Magnetic bearing controller and power supply control method, device and storage medium thereof

Abstract

The application belongs to the technical field of magnetic suspension, and discloses a power supply control method and device of a magnetic suspension bearing controller, the magnetic suspension bearing controller and a storage medium, the method comprising: controlling a current switching power supply to supply power to the magnetic suspension bearing controller; acquiring current temperature information and current noise information of the current switching power supply; determining whether the current switching power supply has failed according to the current temperature information and the current noise information of the current switching power supply of the magnetic suspension bearing controller; if the current switching power supply has failed, switching the current switching power supply to another switching power supply to control the other switching power supply to supply power to the magnetic suspension bearing controller; and if the current switching power supply has not failed, continuing to control the current switching power supply to supply power to the magnetic suspension bearing controller. According to the scheme, a redundant power supply is arranged as a power supply, the temperature and sound of the power supply are detected, and the redundant power supply is switched to supply power when it is determined that the power supply is abnormal, so that normal power supply is ensured.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of magnetic suspension, and particularly relates to a power supply control method and device of a magnetic suspension bearing controller, the magnetic suspension bearing controller, and a storage medium, and more particularly relates to a multi-dimensional detection and control method and device for power supply of a magnetic suspension bearing controller of a magnetic suspension compressor, the magnetic suspension bearing controller of the magnetic suspension compressor, and a storage medium. BACKGROUND

[0002] In the power supply circuit, the number of electronic components is large, and the arrangement structure is complex. In the power supply circuit, if the selected specifications of the electronic components are abnormal, the output of the power supply circuit will be abnormal, that is, the power supply will fail. In related solutions, the detection means for detecting whether the power supply fails is single, such as detecting whether the electronic components in the power supply circuit are damaged by breaking the power supply again. In addition, once the power supply fails, the only way to normally supply power to the electrical equipment is to replace a new power supply.

[0003] For the magnetic suspension compressor, when the magnetic suspension compressor is working, if the power supply control power supply of the magnetic suspension bearing controller suddenly fails, the magnetic suspension bearing controller cannot be stably powered, which leads to instability of the rotor of the magnetic suspension compressor and damage to the magnetic suspension compressor.

[0004] The above content is only used to assist in understanding the technical solutions of the present application and does not mean that the above content is prior art. SUMMARY

[0005] The present application aims to provide a power supply control method and device of a magnetic suspension bearing controller, the magnetic suspension bearing controller, and a storage medium, to solve the problem that when the magnetic suspension compressor is working, if the power supply control power supply of the magnetic suspension bearing controller suddenly fails, the magnetic suspension bearing controller cannot be stably powered, which leads to instability of the rotor of the magnetic suspension compressor and damage to the magnetic suspension compressor, affecting the reliability and safety of the magnetic suspension compressor. The first switching power supply and the second switching power supply are redundantly arranged as the power supply of the magnetic suspension bearing controller of the magnetic suspension compressor. The temperature and sound of the power supply of the magnetic suspension bearing controller of the magnetic suspension compressor are detected. When it is determined that the current switching power supply in the power supply of the magnetic suspension bearing controller of the magnetic suspension compressor is abnormal, another switching power supply in the power supply of the magnetic suspension bearing controller of the magnetic suspension compressor is switched to supply power, so as to ensure normal power supply of the magnetic suspension bearing controller of the magnetic suspension compressor, which is beneficial to improving the reliability and safety of the magnetic suspension compressor.

[0006] The application provides a power supply control method of a magnetic suspension bearing controller, a power supply of the magnetic suspension bearing controller, and a power supply control method of the magnetic suspension bearing controller.

[0007] In some embodiments, obtaining the power board temperature of the current switching power supply of the magnetic suspension bearing controller to obtain the current temperature information of the current switching power supply of the magnetic suspension bearing controller comprises: obtaining the power board temperature detected by a temperature detection module arranged on the power board of the power supply of the magnetic suspension bearing controller, and converting the power board temperature into voltage information as the current temperature information of the current switching power supply of the magnetic suspension bearing controller; and / or obtaining the noise emitted by the current switching power supply of the magnetic suspension bearing controller to obtain the current noise information of the current switching power supply of the magnetic suspension bearing controller comprises: obtaining the noise in the electric appliance box detected by a noise detection module arranged in the power supply box of the power supply of the magnetic suspension bearing controller, and converting the noise in the electric appliance box into a signal in the frequency domain by Fourier transform after the noise in the electric appliance box is converted into a signal in the time domain to obtain the sound vibration frequency as the current noise information of the current switching power supply of the magnetic suspension bearing controller.

[0008] In some embodiments, the noise detection module comprises a sound sensor with a built-in condenser microphone; and the temperature detection module comprises a temperature sensor with a built-in PT resistor.

[0009] In some embodiments, the method for determining whether the current switching power supply of the magnetic suspension bearing controller has failed according to the current temperature information of the current switching power supply of the magnetic suspension bearing controller and the current noise information of the current switching power supply of the magnetic suspension bearing controller comprises: determining a reference voltage of the current switching power supply of the magnetic suspension bearing controller at a rated working temperature and a working frequency of the current switching power supply of the magnetic suspension bearing controller at the rated working temperature; determining whether the voltage information corresponding to the current temperature information of the current switching power supply of the magnetic suspension bearing controller is greater than or equal to the reference voltage of the current switching power supply of the magnetic suspension bearing controller at the rated working temperature and whether the sound vibration frequency corresponding to the current noise information of the current switching power supply of the magnetic suspension bearing controller is greater than or equal to the working frequency of the current switching power supply of the magnetic suspension bearing controller at the rated working temperature; if so, determining that the current switching power supply of the magnetic suspension bearing controller has failed; and if not, determining that the current switching power supply of the magnetic suspension bearing controller has not failed.

[0010] In some embodiments, further comprising: after controlling the other one of the first switching power supply and the second switching power supply to supply power to the magnetic levitation bearing controller, recording the other one of the first switching power supply and the second switching power supply currently supplying power to the magnetic levitation bearing controller as a new current switching power supply of the magnetic levitation bearing controller; detecting a power board temperature of the new current switching power supply of the magnetic levitation bearing controller under the power supply of the new current switching power supply of the magnetic levitation bearing controller to obtain current temperature information of the new current switching power supply of the magnetic levitation bearing controller; detecting noise emitted by the new current switching power supply of the magnetic levitation bearing controller to obtain current noise information of the new current switching power supply of the magnetic levitation bearing controller; determining whether the new current switching power supply of the magnetic levitation bearing controller has failed according to the current temperature information of the new current switching power supply of the magnetic levitation bearing controller and the current noise information of the new current switching power supply of the magnetic levitation bearing controller; if it is determined that the new current switching power supply of the magnetic levitation bearing controller has failed, determining that the power supply of the magnetic levitation bearing controller has failed, controlling the magnetic levitation bearing controller to be powered off, and initiating a prompt message that the power supply of the magnetic levitation bearing controller needs to be replaced; and if it is determined that the new current switching power supply of the magnetic levitation bearing controller has not failed, continuing to control the new current switching power supply of the magnetic levitation bearing controller to supply power to the magnetic levitation bearing controller.

[0011] According to the method, the application provides a power supply control device of a magnetic suspension bearing controller, the power supply of the magnetic suspension bearing controller comprising a first switching power supply and a second switching power supply; the first switching power supply and the second switching power supply are redundant power supplies; the power supply control device of the magnetic suspension bearing controller comprises a control unit configured to control one of the first switching power supply and the second switching power supply to supply power to the magnetic suspension bearing controller when the magnetic suspension bearing controller needs power supply; one of the first switching power supply and the second switching power supply currently supplying power to the magnetic suspension bearing controller is recorded as the current switching power supply of the magnetic suspension bearing controller; a obtaining unit is configured to obtain the power board temperature of the current switching power supply of the magnetic suspension bearing controller to obtain the current temperature information of the current switching power supply of the magnetic suspension bearing controller and obtain the noise emitted by the current switching power supply of the magnetic suspension bearing controller to obtain the current noise information of the current switching power supply of the magnetic suspension bearing controller when the current switching power supply of the magnetic suspension bearing controller supplies power to the magnetic suspension bearing controller; the control unit is further configured to determine whether the current switching power supply of the magnetic suspension bearing controller has failed according to the current temperature information of the current switching power supply of the magnetic suspension bearing controller and the current noise information of the current switching power supply of the magnetic suspension bearing controller; the control unit is further configured to switch the current switching power supply of the magnetic suspension bearing controller to another switching power supply except the current switching power supply of the magnetic suspension bearing controller among the first switching power supply and the second switching power supply to control the other switching power supply among the first switching power supply and the second switching power supply to supply power to the magnetic suspension bearing controller if it is determined that the current switching power supply of the magnetic suspension bearing controller has failed; and the control unit is further configured to continue to control the current switching power supply of the magnetic suspension bearing controller to supply power to the magnetic suspension bearing controller if it is determined that the current switching power supply of the magnetic suspension bearing controller has not failed.

[0012] In some embodiments, the obtaining unit obtains the current power board temperature of the current switching power supply of the magnetic suspension bearing controller to obtain the current temperature information of the current switching power supply of the magnetic suspension bearing controller, including: obtaining the power board temperature detected by a temperature detection module arranged on the power board of the power supply of the magnetic suspension bearing controller, converting the power board temperature into voltage information as the current temperature information of the current switching power supply of the magnetic suspension bearing controller; and / or the obtaining unit obtains the noise emitted by the current switching power supply of the magnetic suspension bearing controller to obtain the current noise information of the current switching power supply of the magnetic suspension bearing controller, including: obtaining the noise in the power box detected by a noise detection module arranged in the power box of the power supply of the magnetic suspension bearing controller, converting the noise in the power box into a signal in the frequency domain by Fourier transform after converting the noise in the power box into a signal in the time domain to obtain the sound vibration frequency as the current noise information of the current switching power supply of the magnetic suspension bearing controller.

[0013] In some embodiments, the noise detection module includes a sound sensor with a capacitive electret microphone; and the temperature detection module includes a temperature sensor with a PT resistor.

[0014] In some embodiments, the control unit determines whether the current switching power supply of the magnetic suspension bearing controller has failed according to the current temperature information of the current switching power supply of the magnetic suspension bearing controller and the current noise information of the current switching power supply of the magnetic suspension bearing controller, including: determining the reference voltage of the current switching power supply of the magnetic suspension bearing controller at the rated working temperature, and determining the working frequency of the current switching power supply of the magnetic suspension bearing controller at the rated working temperature; determining whether the voltage information corresponding to the current temperature information of the current switching power supply of the magnetic suspension bearing controller is greater than or equal to the reference voltage of the current switching power supply of the magnetic suspension bearing controller at the rated working temperature, and whether the sound vibration frequency corresponding to the current noise information of the current switching power supply of the magnetic suspension bearing controller is greater than or equal to the working frequency of the current switching power supply of the magnetic suspension bearing controller at the rated working temperature; if yes, it is determined that the current switching power supply of the magnetic suspension bearing controller has failed; if not, it is determined that the current switching power supply of the magnetic suspension bearing controller has not failed.

[0015] In some embodiments, the control unit is further configured to, after controlling the other one of the first switching power supply and the second switching power supply to supply power to the magnetic levitation bearing controller, record the other one of the first switching power supply and the second switching power supply that is currently supplying power to the magnetic levitation bearing controller as a new current switching power supply of the magnetic levitation bearing controller; the acquisition unit is further configured to, under the condition that the new current switching power supply supplies power, detect a power board temperature of the new current switching power supply to obtain current temperature information of the new current switching power supply; and detect noise emitted by the new current switching power supply to obtain current noise information of the new current switching power supply; the control unit is further configured to determine whether the new current switching power supply has failed according to the current temperature information of the new current switching power supply and the current noise information of the new current switching power supply; the control unit is further configured to, if it is determined that the new current switching power supply has failed, determine that the power supply of the magnetic levitation bearing controller has failed, control the magnetic levitation bearing controller to be powered off, and initiate a prompt message that the power supply of the magnetic levitation bearing controller needs to be replaced; and the control unit is further configured to, if it is determined that the new current switching power supply has not failed, continue to control the new current switching power supply to supply power to the magnetic levitation bearing controller.

[0016] In another aspect, the present application provides a magnetic levitation bearing controller matched with the above-mentioned device, comprising the above-mentioned power supply control device of the magnetic levitation bearing controller.

[0017] In another aspect, the present application provides a storage medium matched with the above-mentioned method, comprising a stored program, wherein when the program runs, the device where the storage medium is located performs the above-mentioned power supply control method of the magnetic levitation bearing controller.

[0018] According to the scheme, the first switching power supply and the second switching power supply are arranged for the power supply of the magnetic suspension bearing controller of the magnetic suspension compressor, and the first switching power supply and the second switching power supply are arranged in a redundant structure; the temperature detection logic circuit and the noise detection logic circuit are arranged for the power supply of the magnetic suspension bearing controller of the magnetic suspension compressor; the temperature detection logic circuit can detect the temperature information of the power supply of the magnetic suspension bearing controller of the magnetic suspension compressor, convert the detected temperature information of the power supply of the magnetic suspension bearing controller of the magnetic suspension compressor into a voltage, compare the voltage with the reference voltage of the power supply under the rated working temperature, and output a temperature abnormality signal if the voltage exceeds the reference voltage of the power supply under the rated working temperature; the noise detection logic circuit can detect the noise information of the power supply of the magnetic suspension bearing controller of the magnetic suspension compressor, obtain a noise frequency through Fourier transform of the detected noise information of the power supply of the magnetic suspension bearing controller of the magnetic suspension compressor, compare the noise frequency with the working frequency of the power supply under the rated working temperature, and output a sound abnormality signal if the noise frequency exceeds the working frequency of the power supply under the rated working temperature; the control chip of the magnetic suspension bearing controller of the magnetic suspension compressor determines that the current switching power supply in the power supply of the magnetic suspension bearing controller of the magnetic suspension compressor is abnormal when receiving the temperature abnormality signal and the sound abnormality signal, switches the current switching power supply in the power supply of the magnetic suspension bearing controller of the magnetic suspension compressor to another switching power supply, and makes the other switching power supply supply power to the magnetic suspension bearing controller of the magnetic suspension compressor; thus, the first switching power supply and the second switching power supply are redundantly arranged as the power supply of the magnetic suspension bearing controller of the magnetic suspension compressor, the temperature and sound of the power supply of the magnetic suspension bearing controller of the magnetic suspension compressor are detected, another switching power supply in the power supply of the magnetic suspension bearing controller of the magnetic suspension compressor is switched to supply power when it is determined that the current switching power supply in the power supply of the magnetic suspension bearing controller of the magnetic suspension compressor is abnormal, the normal power supply of the magnetic suspension bearing controller of the magnetic suspension compressor is ensured, and the reliability and safety of the magnetic suspension compressor are improved.

[0019] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent to those skilled in the art from the description, or can be learned by practice of the application.

[0020] The technical scheme of the present application will be further described in detail below with the help of the drawings and examples. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 Flowchart of an embodiment of the power supply control method of the magnetic suspension bearing controller of the present application;

[0022] Figure 2Flow chart of an embodiment of the method of the present application for determining whether a current switching power supply has failed according to current temperature information and current noise information of the current switching power supply;

[0023] Figure 3 Flow chart of an embodiment of the method of the present application for detecting and determining whether another switching power supply has failed;

[0024] Figure 4 Structure diagram of an embodiment of the power supply control device of the magnetic suspension bearing controller of the present application;

[0025] Figure 5 Structure diagram of an embodiment of the power supply multi-dimension detection and control device of the magnetic suspension bearing controller of the magnetic suspension compressor of the present application;

[0026] Figure 6 Structure diagram of an embodiment of the noise detection logic circuit of the power supply multi-dimension detection and control device of the magnetic suspension bearing controller of the magnetic suspension compressor of the present application;

[0027] Figure 7 Structure diagram of an embodiment of the temperature detection logic circuit of the power supply multi-dimension detection and control device of the magnetic suspension bearing controller of the magnetic suspension compressor of the present application;

[0028] Figure 8 Linear relationship between voltage and temperature of the temperature detection logic circuit of the power supply multi-dimension detection and control device of the magnetic suspension bearing controller of the magnetic suspension compressor of the present application;

[0029] Figure 9 Flow chart of an embodiment of the power supply multi-dimension detection and control method of the magnetic suspension bearing controller of the magnetic suspension compressor of the present application.

[0030] In combination with the drawings, the reference signs in the embodiments of the present application are as follows:

[0031] 102 - acquisition unit; 104 - control unit. DETAILED DESCRIPTION

[0032] To make the objectives, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described below in combination with specific embodiments of the present application and corresponding drawings. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0033] Considering that, when the magnetic suspension compressor is working, the power supply control power of the magnetic suspension bearing controller is suddenly damaged, the power supply control power of the magnetic suspension bearing controller cannot be stably supplied, thereby causing the rotor of the magnetic suspension compressor to be unstable and the magnetic suspension compressor to be damaged, and the reliability and safety of the magnetic suspension compressor are affected. Therefore, when the power supply control power of the magnetic suspension bearing controller fails, the failure of the power supply control power of the magnetic suspension bearing controller needs to be detected in time, and effective solutions are given.

[0034] In addition, through a large number of experiments on the switching power supply, it is found that the switching power supply will appear some phenomena before failure, for example, the transformer will emit abnormal sound, the temperature of the power device will suddenly rise, the chip and other devices will emit black smoke and choking smell due to high temperature, and the switching power supply will not work normally and can cause harm to the magnetic suspension bearing controller of the magnetic suspension compressor and the magnetic suspension bearing of the magnetic suspension compressor. Among them, the chip refers to the main component for controlling the working of the power supply, and the internal control circuit is more precise, such as AD unit, EPWM unit, CAN unit and the like. For example, the chip can be a chip made by TI company, such as a chip with model IC LM5021MM-2 / NOPB.

[0035] Therefore, the scheme of the present application provides a power supply control method of a magnetic suspension bearing controller, specifically a power supply multi-dimensional detection and control method of a magnetic suspension bearing controller of a magnetic suspension compressor. By adopting a redundant structure of a switching power supply, a redundant power supply is arranged for the power supply of the magnetic suspension bearing controller. By adding temperature sensors and sound sensors, whether the power supply of the magnetic suspension bearing controller fails is detected and judged from multiple dimensions such as temperature and sound. When it is judged that the power supply of the magnetic suspension bearing controller fails, the failure of the power supply of the magnetic suspension bearing controller is fed back to the magnetic suspension bearing controller, and the control chip of the magnetic suspension bearing controller switches the power supply mode from the current power supply to the redundant power supply, so as to ensure the normal operation of the magnetic suspension bearing controller and improve the safety and reliability of the power supply of the magnetic suspension bearing controller.

[0036] According to the embodiment of the present application, a power supply control method of a magnetic suspension bearing controller is provided, as shown in Figure 1 The power supply of the magnetic suspension bearing controller includes a first switching power supply and a second switching power supply. The first switching power supply and the second switching power supply are redundant power supplies. By arranging the redundant power supply, the lower computer can be protected, and the bearing can be effectively protected to reduce the wear of the bearing. Specifically, Figure 5 is a structural schematic diagram of an embodiment of a power supply multi-dimensional detection and control device of a magnetic suspension bearing controller of a magnetic suspension compressor.Figure 5 As shown in the figure, the power supply multi-dimension detection and control device of the magnetic suspension bearing controller of the magnetic suspension compressor comprises a power supply 1 and a power supply 2, the first switching power supply is the power supply 1, and the second switching power supply is the power supply 2. Figure 1 As shown in the figure, the power supply control method of the magnetic suspension bearing controller comprises steps S110 to S150.

[0037] At step S110, when the magnetic suspension bearing controller needs to be powered, one of the first switching power supply and the second switching power supply is controlled to power the magnetic suspension bearing controller; the one of the first switching power supply and the second switching power supply currently powering the magnetic suspension bearing controller is recorded as the current switching power supply of the magnetic suspension bearing controller.

[0038] At step S120, when the current switching power supply of the magnetic suspension bearing controller is powering the magnetic suspension bearing controller, the power panel temperature of the current switching power supply of the magnetic suspension bearing controller is obtained to obtain the current temperature information of the current switching power supply of the magnetic suspension bearing controller; and the noise emitted by the current switching power supply of the magnetic suspension bearing controller is obtained to obtain the current noise information of the current switching power supply of the magnetic suspension bearing controller.

[0039] In some embodiments, obtaining the power panel temperature of the current switching power supply of the magnetic suspension bearing controller to obtain the current temperature information of the current switching power supply of the magnetic suspension bearing controller in step S120 comprises: obtaining the power panel temperature detected by the temperature detection module arranged on the power panel of the power supply of the magnetic suspension bearing controller, and converting the power panel temperature into voltage information as the current temperature information of the current switching power supply of the magnetic suspension bearing controller.

[0040] In the example shown in the figure, the over-temperature detection unit is a temperature detection logic circuit. Figure 5 As shown in the figure, the over-temperature detection unit is a temperature detection logic circuit. Figure 7 As shown in the figure, the over-temperature detection unit is a temperature detection logic circuit. Figure 7As shown, the temperature detection logic circuit comprises a PT resistor, a resistor 1, a resistor 2, a resistor 3, a resistor 4, and a voltage comparator. The resistor 1, the resistor 2, and the resistor 3 are resistors with the same resistance value, the PT resistor is a thermistor, and the resistance value of the PT resistor decreases with the increase of temperature. The PT resistor and the resistor 1 are connected in series and are connected in parallel to the two ends of the power supply. The resistor 2 and the resistor 3 are connected in series and are connected in parallel to the two ends of the power supply. The common end of the PT resistor and the resistor 1 and the common end of the resistor 2 and the resistor 3 are connected to the first input end of the voltage comparator. The second input end of the voltage comparator is used to input a reference voltage (VEF) of the power supply at a rated working temperature.

[0041] In Figure 7 In the example shown, the temperature detection logic circuit is composed of a power supply, a PT resistor, three resistors with constant resistance values (such as a resistor 1, a resistor 2, and a resistor 3), and a voltage comparator. The four resistors form a bridge circuit (i.e., a bridge), which serves as the temperature detection logic circuit. The resistance value of the PT resistor built in the temperature detection logic circuit decreases with the increase of temperature, and then the voltage difference between the two sides of the bridge gradually increases. The temperature detection logic circuit serves as a temperature sensor, and the temperature sensor collects temperatures T1, T2,..., TN (N is a natural number) of N points on the power board of the power supply. When the temperature sensor senses that a certain temperature increases to a preset temperature protection threshold, the voltage between the two ends of the bridge exceeds the reference voltage of the power supply at the rated working temperature, and the temperature detection logic circuit outputs an abnormal signal to the first input end of the AND logic gate circuit (i.e., the No. 1 pin of the AND logic gate circuit).

[0042] In some embodiments, the current noise information of the current switching power supply of the magnetic suspension bearing controller is obtained by Fourier transforming the noise detected by the noise detection module in the power supply box of the power supply of the magnetic suspension bearing controller, and converting the signal of the noise in the electrical appliance box from the time domain to the frequency domain to obtain the sound vibration frequency.

[0043] In Figure 5 In the example shown, the sound frequency detection unit can adopt a noise detection logic circuit. Figure 6 FIG. 1 is a structural schematic diagram of an embodiment of a noise detection logic circuit in a power supply multi-dimensional detection and control device of a magnetic suspension bearing controller of a magnetic suspension compressor according to the present application. Figure 6As shown, the noise detection logic circuit includes a sound frequency detection module, an FFT module (i.e. Fourier transform module) and a frequency comparator. Power supply 1 and power supply 2, after the sound frequency detection module and the FFT module, are input to the first input end of the frequency comparator, the second input end of the frequency comparator inputs the working frequency (FEF) of the power supply at the rated working temperature, and the output end of the frequency comparator is output to the second input end of the AND gate logic circuit.

[0044] In Figure 6 In the example shown, the sound frequency detection module is composed of a noise sensor, which is applied to the electrical box of power supply 1 and power supply 2 and is stored in a sealed space, so as to effectively block the influence of external noise. At the same time, the noise information detected by the noise sensor is subjected to Fourier transform by the FFT module to detect the frequency of the sound vibration. If there is no fault, the detected frequency of the sound vibration will be a periodic waveform within a specified range. If the detected frequency of the sound vibration is greater than the working frequency of the power supply at the rated working temperature, the sound frequency detection unit outputs an abnormal signal to the second input end of the AND logic gate circuit (i.e. pin 2 of the AND logic gate circuit). Among them, the noise sensor needs to be placed close to the power supply. When the power supply is abnormal, the sound frequency emitted by the power supply is relatively high, and the sound frequency of the external noise is relatively low. After Fourier transform, the waveform of the low-frequency external noise is relatively smooth and can be ignored.

[0045] Preferably, the noise detection module includes a sound sensor with a built-in capacitive electret microphone, for example, in the noise detection logic circuit, the sound sensor is built-in a sound-sensitive capacitive electret microphone. The temperature detection module includes a temperature sensor with a built-in PT resistor. Specifically, Figure 8 A linear relationship between voltage and temperature of the temperature detection logic circuit of the power supply multi-dimensional detection and control device of the magnetic suspension bearing controller of the magnetic suspension compressor is shown in the schematic diagram. As shown in Figure 8 , Figure 8 The voltage-temperature linear relationship diagram of the temperature detection logic circuit is shown. The principle is that the resistance of the PT resistor will decrease with the increase of temperature, thereby causing the change of the voltage across the bridge, and the voltage and the temperature show a linear increase relationship. The higher the temperature, the higher the voltage. Therefore, the real-time power supply temperature can be determined by the voltage-temperature linear relationship diagram.

[0046] At step S130, whether the current switching power supply of the magnetic suspension bearing controller has appeared a fault is determined according to the current temperature information of the current switching power supply of the magnetic suspension bearing controller and the current noise information of the current switching power supply of the magnetic suspension bearing controller. In this way, whether the current switching power supply of the magnetic suspension bearing controller has appeared a fault is determined according to the current temperature information of the current switching power supply of the magnetic suspension bearing controller and the current noise information of the current switching power supply of the magnetic suspension bearing controller, so that the control method of multi-dimensional detection is realized through two dimensions of sound and temperature, and whether the current switching power supply of the magnetic suspension bearing controller has appeared a fault is determined from two dimensions, so that the detection rigor can be well increased and the accuracy of the detection result can be improved.

[0047] In some embodiments, the specific process of determining whether the current switching power supply of the magnetic suspension bearing controller has appeared a fault according to the current temperature information of the current switching power supply of the magnetic suspension bearing controller and the current noise information of the current switching power supply of the magnetic suspension bearing controller in step S130 is described in the following exemplary description.

[0048] The following Figure 2 The following embodiment flowchart of determining whether the current switching power supply has appeared a fault according to the current temperature information and the current noise information of the current switching power supply in the method of the present application is further used to illustrate the specific process of determining whether the current switching power supply has appeared a fault according to the current temperature information and the current noise information of the current switching power supply in step S130, which includes steps S210 to S230.

[0049] At step S210, the reference voltage of the current switching power supply of the magnetic suspension bearing controller at the rated working temperature is determined, and the working frequency of the current switching power supply of the magnetic suspension bearing controller at the rated working temperature is determined.

[0050] At step S220, whether the following conditions are met is determined: the voltage information corresponding to the current temperature information of the current switching power supply of the magnetic suspension bearing controller is greater than or equal to the reference voltage of the current switching power supply of the magnetic suspension bearing controller at the rated working temperature; and the sound vibration frequency corresponding to the current noise information of the current switching power supply of the magnetic suspension bearing controller is greater than or equal to the working frequency of the current switching power supply of the magnetic suspension bearing controller at the rated working temperature.

[0051] At step S230, if the conditions are met, it is determined that the current switching power supply of the magnetic suspension bearing controller has appeared a fault; if the conditions are not met, it is determined that the current switching power supply of the magnetic suspension bearing controller has not appeared a fault.

[0052] Specifically, Figure 9A flowchart of an embodiment of the power supply multi-dimensional detection and control method of the magnetic suspension bearing controller of a magnetic suspension compressor of the present application. As shown in Figure 9 The power supply multi-dimensional detection and control method of the magnetic suspension bearing controller of a magnetic suspension compressor of the present application includes the following steps:

[0053] Step S1, in the initial state, power supply by power supply 1, that is, power supply 1 supplies power to the magnetic suspension bearing controller of the magnetic suspension compressor. Since the temperature detection logic circuit and the noise detection logic circuit detect the power supply 1, the power supply 1 also supplies power to the temperature detection logic circuit and the noise detection logic circuit. Then, step S2 is performed.

[0054] Step S2, the temperature detection logic circuit and the noise detection logic circuit detect whether the power supply 1 has an abnormality: if yes, step S4 is performed, otherwise, step S3 is performed, that is, the CPU normally works. The CPU is only the overall control chip of the switching power supply.

[0055] In the step of detecting whether the power supply 1 has an abnormality, the resistance value of the PT resistor built in the temperature detection logic circuit decreases with the increase of temperature, and the voltage difference on both sides of the bridge gradually increases. The temperature sensor collects the temperatures T1, T2,..., TN (N is a natural number) of N points on the power supply board of the power supply. When the temperature sensor senses that a certain temperature rises to a preset temperature protection threshold, the voltage across the bridge exceeds the reference voltage at the rated working temperature of the power supply, and the temperature detection logic circuit outputs an abnormal signal to the first input end of the AND logic gate circuit (i.e. the No. 1 pin of the AND logic gate circuit). In the noise detection logic circuit, a capacitive electret microphone sensitive to sound is built in the sound sensor. The sound wave makes the electret film in the capacitive electret microphone vibrate, causing the change of the capacitance, and generating a voltage corresponding thereto. The frequency of the sound vibration is detected by Fourier transform. If there is no fault, the detected frequency of the sound vibration will be a periodic waveform within a specified range. If the detected frequency of the sound vibration is greater than the working frequency at the rated working temperature of the power supply, the sound frequency detection unit outputs an abnormal signal to the second input end of the AND logic gate circuit (i.e. the No. 2 pin of the AND logic gate circuit). The logic gate uses the AND logic gate circuit. The AND logic gate circuit has the characteristic that when the input is all 1, the output is 1; otherwise, the output is 0. Therefore, only when both power supply detection modules (i.e. the temperature detection logic circuit and the noise detection logic circuit) output an abnormality, the AND logic gate circuit outputs a control signal to control the closing and opening of the switch (such as the single-pole double-throw switch in Figure 5 When the AND logic gate circuit does not detect an abnormal signal or detects only one abnormal signal, step S3 is performed, and 0 is output, the power supply 1 normally supplies power; when the AND logic gate circuit detects two abnormal signals, step S4 is performed. See Figure 5The example shows that the single-pole double-throw switch has a first connection end, a second connection end and a control end, the first connection end of the single-pole double-throw switch is connected with the power supply 1, the second connection end of the single-pole double-throw switch is connected with the power supply 2, and the control end of the single-pole double-throw switch is connected with the control signal output end of the CPU. The scheme of the present application is a multi-dimensional detection control method through two dimensions of sound and temperature, and the control logic selects an AND gate (i.e. an AND logic gate circuit), which can well increase the detection rigor and improve the detection accuracy.

[0056] In step S4, the AND logic gate circuit outputs 1, at this time, the power supply 1 is disconnected, the switch is connected to the power supply 2, and the power supply 2 is used for power supply, i.e. the power supply 2 is used for power supply of the magnetic suspension bearing controller of the magnetic suspension compressor. Since the temperature detection logic circuit and the noise detection logic circuit detect the power supply 2, the power supply 2 also supplies power to the temperature detection logic circuit and the noise detection logic circuit. Then, step S5 is performed.

[0057] At step S140, if it is determined that the current switching power supply of the magnetic suspension bearing controller has failed, the current switching power supply of the magnetic suspension bearing controller is switched to another switching power supply except the current switching power supply of the magnetic suspension bearing controller among the first switching power supply and the second switching power supply, so as to control the other switching power supply among the first switching power supply and the second switching power supply to supply power to the magnetic suspension bearing controller.

[0058] At step S150, if it is determined that the current switching power supply of the magnetic suspension bearing controller has not failed, the current switching power supply of the magnetic suspension bearing controller is continued to be controlled to supply power to the magnetic suspension bearing controller.

[0059] As Figure 5As shown, the power supply multi-dimensional detection and control device of the magnetic suspension bearing controller of the magnetic suspension compressor further comprises: a switching power supply of the magnetic suspension bearing controller of the magnetic suspension compressor, a sound receiver, a PT resistance, an over-temperature detection unit, a sound frequency detection unit, an AND logic circuit and a CPU. The PT resistance is a platinum resistance, and the resistance value of the platinum resistance changes with temperature. The switching power supply comprises a power supply 1 and a power supply 2, and the power supply 1 and the power supply 2 constitute a redundant structure and are redundant power supplies of each other. After the PT resistance samples the temperature information of the switching power supply of the magnetic suspension bearing controller, the first detection result is obtained after detection by the over-temperature detection unit, and the first detection result is input to the first input end of the AND logic module. After the sound receiver samples the noise information of the switching power supply of the magnetic suspension bearing controller, the second detection result is obtained after detection by the sound frequency detection unit, and the second detection result is transmitted to the second input end of the AND logic circuit. The AND logic circuit outputs a signal indicating that the switching power supply is normal or abnormal based on the first detection result and the second detection result. The CPU controls the power supply 1 and the power supply 2 in the switching power supply based on the signal indicating that the switching power supply is normal or abnormal, such as switching to the power supply 2 for power supply when the power supply 1 is abnormal, to realize stable power supply of the magnetic suspension bearing controller of the magnetic suspension compressor and reduce damage to the magnetic suspension compressor.

[0060] Although two power supplies are used in the related scheme, only the magnetic suspension bearing of the magnetic suspension compressor is detected from the displacement dimension, and the drop protection branch works in the displacement abnormal condition. The scheme of the present application mainly detects the temperature and sound signals of the power supply from two dimensions, which is beneficial to increase the reliability of the detection result. Once one power supply is abnormal, the other power supply is replaced immediately, and the power supply redundant structure effectively reduces the risk of magnetic suspension bearing abrasion of the magnetic suspension compressor and protects the magnetic suspension bearing of the magnetic suspension compressor.

[0061] The power supply multi-dimensional detection and control method of the magnetic suspension bearing controller of the magnetic suspension compressor provided by the scheme has the following advantages. The power supply of the magnetic suspension bearing controller adopts a switching power supply, and the switching power supply is provided with a redundant power supply in a redundant structure. The temperature sensor and the sound sensor are added to form a detection and control circuit with the control chip of the magnetic suspension bearing controller. The condition of whether the power supply of the magnetic suspension bearing controller is faulty is detected and judged from multiple dimensions such as temperature and sound. When it is judged that the power supply of the magnetic suspension bearing controller is faulty, the condition of the faulty power supply of the magnetic suspension bearing controller is fed back to the magnetic suspension bearing controller. The control chip of the magnetic suspension bearing controller switches the power supply mode from the current power supply to the redundant power supply, so as to ensure the normal operation of the magnetic suspension bearing controller. In this way, the multi-dimensional detection of the power supply of the magnetic suspension bearing controller can realize real-time monitoring and detection of faults and intelligent switching of the redundant power supply, effectively guaranteeing the detection of false detection faults, missed detection faults and excessively high temperature conditions of the power supply of the magnetic suspension bearing controller, intelligently switching the redundant power supply, and effectively guaranteeing that the magnetic suspension bearing controller can continuously obtain stable power supply, thereby improving the safety and reliability of the power supply of the magnetic suspension bearing controller. Thus, the problem that the rotor of the magnetic suspension compressor is damaged due to the instability of the rotor of the magnetic suspension compressor caused by the sudden damage of the power supply control power supply of the magnetic suspension bearing controller and the inability of the power supply control power supply of the magnetic suspension bearing controller to supply stable power is solved.

[0062] In some embodiments, the power supply control method of the magnetic suspension bearing controller also includes the process of detecting and determining whether the other switching power supply has appeared abnormal.

[0063] The following will be described in detail with reference to the accompanying drawings. Figure 3 The following will be described in detail with reference to the accompanying drawings.

[0064] Step S310, after controlling the other switching power supply of the first switching power supply and the second switching power supply to supply power to the magnetic suspension bearing controller, the other switching power supply currently supplying power to the magnetic suspension bearing controller of the first switching power supply and the second switching power supply is recorded as the new current switching power supply of the magnetic suspension bearing controller.

[0065] Step S320, detecting the power board temperature of the current switching power supply of the new magnetic suspension bearing controller under the condition that the new magnetic suspension bearing controller is powered by the current switching power supply, to obtain the current temperature information of the current switching power supply of the new magnetic suspension bearing controller; and detecting the noise emitted by the current switching power supply of the new magnetic suspension bearing controller, to obtain the current noise information of the current switching power supply of the new magnetic suspension bearing controller.

[0066] Step S330, determining whether the current switching power supply of the new magnetic suspension bearing controller has failed according to the current temperature information of the current switching power supply of the new magnetic suspension bearing controller and the current noise information of the current switching power supply of the new magnetic suspension bearing controller. The specific way of determining whether the current switching power supply of the new magnetic suspension bearing controller has failed according to the current temperature information of the current switching power supply of the new magnetic suspension bearing controller and the current noise information of the current switching power supply of the new magnetic suspension bearing controller in step S330 is the same as that of determining whether the current switching power supply of the magnetic suspension bearing controller has failed according to the current temperature information of the current switching power supply of the magnetic suspension bearing controller and the current noise information of the current switching power supply of the magnetic suspension bearing controller in step S130.

[0067] Step S340, if it is determined that the current switching power supply of the new magnetic suspension bearing controller has failed, it is determined that the power supply of the magnetic suspension bearing controller has failed, that is, it is determined that both the first switching power supply and the second switching power supply have failed, the magnetic suspension bearing controller is powered off, and a prompt message is initiated that the power supply of the magnetic suspension bearing controller needs to be replaced.

[0068] Step S350, if it is determined that the current switching power supply of the new magnetic suspension bearing controller has not failed, the current switching power supply of the new magnetic suspension bearing controller continues to power the magnetic suspension bearing controller.

[0069] Specifically, as shown in Figure 9 The power supply multi-dimensional detection and control method of the magnetic suspension bearing controller of the magnetic suspension compressor provided by the scheme of the present application further comprises: step S5, detecting whether the power supply 2 is abnormal by the temperature detection logic circuit and the noise detection logic circuit; if yes, step S7 is executed, otherwise, step S6, that is, the CPU normally works, is executed.

[0070] In the detection of power supply 2 whether there is an abnormality, the resistance value of PT resistance built-in temperature detection logic circuit decreases with temperature rise, then the voltage difference of the two sides of the bridge gradually increases, the temperature sensor collects the temperature T1, T2,..., TN (N is a natural number) of N points on the power supply board of the power supply, when the temperature sensor senses that a certain temperature rises to the preset temperature protection threshold, the voltage across the bridge exceeds the reference voltage at the rated working temperature of the power supply, the temperature detection logic circuit outputs an abnormal signal to the first input end of the AND logic gate circuit (i.e. the No. 1 pin of the AND logic gate circuit). In the noise detection logic circuit, a sound-sensitive capacitive electret microphone is built-in the sound sensor, the sound wave makes the electret film in the capacitive electret microphone vibrate, resulting in the change of the capacitance, and the voltage corresponding thereto is generated, the frequency of the sound vibration is detected by Fourier transform, if there is no fault, the detected frequency of the sound vibration will be periodic waveform within the specified range, if the detected frequency of the sound vibration is greater than the working frequency at the rated working temperature of the power supply, the sound frequency detection unit outputs an abnormal signal to the second input end of the AND logic gate circuit (i.e. the No. 2 pin of the AND logic gate circuit). In the scheme of the application, the noise detection method adopted is to convert the sampled noise signal from time domain to frequency domain by Fourier transform, and to observe whether the frequency change in the frequency spectrum of the frequency domain is abnormal in the upper computer to judge whether the noise signal is abnormal. The logic gate uses the AND logic gate circuit, and the characteristic of the AND logic gate circuit is that when the input is all 1, the output is 1, otherwise the output is 0. Therefore, only when both power supply detection modules (i.e. the temperature detection logic circuit and the noise detection logic circuit) output abnormals, the AND logic gate circuit outputs a control signal to control the closing and opening of the switch. When the AND logic gate circuit does not detect an abnormal signal or detects only one abnormal signal, step S6 is performed to output 0, and the power supply 2 normally supplies power; when the AND logic gate circuit detects two abnormal signals, step S7 is performed to replace the power supply.

[0071] In the scheme of the application, the switching power supply, i.e. the power supply 1 and the power supply 2, adopts a redundant structure, by adding a sound sensor and a corresponding bridge circuit as a temperature sensor, and combining Fourier transform to form two detection circuits (i.e. the temperature detection logic circuit and the noise detection logic circuit), the power supply of the first block is stopped when both detection circuits output abnormals, and the power supply of the next block is used for power supply, which improves the safety and reliability of the power supply of the magnetic levitation bearing controller, and ensures the normal operation of the magnetic levitation bearing controller.

[0072] The technical scheme of the embodiment is adopted, the first switching power supply and the second switching power supply are arranged for the power supply of the magnetic suspension bearing controller of the magnetic suspension compressor, and the first switching power supply and the second switching power supply are arranged in a redundant structure; the temperature detection logic circuit and the noise detection logic circuit are arranged for the power supply of the magnetic suspension bearing controller of the magnetic suspension compressor; wherein the temperature detection logic circuit can detect the temperature information of the power supply of the magnetic suspension bearing controller of the magnetic suspension compressor, convert the detected temperature information of the power supply of the magnetic suspension bearing controller of the magnetic suspension compressor into a voltage, compare the voltage with the reference voltage of the power supply under the rated working temperature, and output a temperature abnormality signal if the voltage exceeds the reference voltage of the power supply under the rated working temperature; the noise detection logic circuit can detect the noise information of the power supply of the magnetic suspension bearing controller of the magnetic suspension compressor, obtain a noise frequency through Fourier transform on the detected noise information of the power supply of the magnetic suspension bearing controller of the magnetic suspension compressor, compare the noise frequency with the working frequency of the power supply under the rated working temperature, and output a sound abnormality signal if the noise frequency exceeds the working frequency of the power supply under the rated working temperature; the control chip of the magnetic suspension bearing controller of the magnetic suspension compressor determines that the current switching power supply in the power supply of the magnetic suspension bearing controller of the magnetic suspension compressor is abnormal when the temperature abnormality signal and the sound abnormality signal are received, switches the current switching power supply in the power supply of the magnetic suspension bearing controller of the magnetic suspension compressor to another switching power supply, and makes the other switching power supply supply power to the magnetic suspension bearing controller of the magnetic suspension compressor; thereby, the first switching power supply and the second switching power supply are redundantly arranged as the power supply of the magnetic suspension bearing controller of the magnetic suspension compressor, the temperature and the sound of the power supply of the magnetic suspension bearing controller of the magnetic suspension compressor are detected, another switching power supply in the power supply of the magnetic suspension bearing controller of the magnetic suspension compressor is switched to supply power when it is determined that the current switching power supply in the power supply of the magnetic suspension bearing controller of the magnetic suspension compressor is abnormal, the normal power supply of the magnetic suspension bearing controller of the magnetic suspension compressor is ensured, and the reliability and the safety of the magnetic suspension compressor are improved.

[0073] According to the embodiment of the application, a power supply control device corresponding to the power supply control method of the magnetic suspension bearing controller is also provided. Figure 4 The structure schematic diagram of an embodiment of the device of the application is shown in the figure. The power supply of the magnetic suspension bearing controller comprises a first switching power supply and a second switching power supply; the first switching power supply and the second switching power supply are redundant power supplies; specifically, Figure 5 The structure schematic diagram of an embodiment of the device of the application is shown in the figure. The power supply of the magnetic suspension bearing controller comprises a first switching power supply and a second switching power supply; the first switching power supply and the second switching power supply are redundant power supplies; specifically, Figure 5As shown in the figure, the power supply multi-dimension detection and control device of the magnetic suspension bearing controller of the magnetic suspension compressor comprises a power supply 1 and a power supply 2, and the first switching power supply is, for example, the power supply 1, and the second switching power supply is, for example, the power supply 2. Figure 4 As shown in the figure, the power supply control device of the magnetic suspension bearing controller comprises an acquisition unit 102 and a control unit 104.

[0074] The control unit 104 is configured to control one of the first switching power supply and the second switching power supply to supply power to the magnetic suspension bearing controller when the magnetic suspension bearing controller needs power supply, and the one of the first switching power supply and the second switching power supply currently supplying power to the magnetic suspension bearing controller is recorded as the current switching power supply of the magnetic suspension bearing controller. For specific functions and processes of the control unit 104, see step S110.

[0075] The acquisition unit 102 is configured to acquire the power panel temperature of the current switching power supply of the magnetic suspension bearing controller to obtain the current temperature information of the current switching power supply of the magnetic suspension bearing controller when the current switching power supply of the magnetic suspension bearing controller supplies power to the magnetic suspension bearing controller, and acquire the noise emitted by the current switching power supply of the magnetic suspension bearing controller to obtain the current noise information of the current switching power supply of the magnetic suspension bearing controller. For specific functions and processes of the acquisition unit 102, see step S120.

[0076] In some embodiments, the acquisition unit 102 acquires the power panel temperature of the current switching power supply of the magnetic suspension bearing controller to obtain the current temperature information of the current switching power supply of the magnetic suspension bearing controller, which comprises that the acquisition unit 102 is specifically further configured to acquire the power panel temperature detected by the temperature detection module arranged on the power panel of the power supply of the magnetic suspension bearing controller, and convert the power panel temperature into voltage information as the current temperature information of the current switching power supply of the magnetic suspension bearing controller.

[0077] In some embodiments, the acquisition unit 102 acquires the power panel temperature of the current switching power supply of the magnetic suspension bearing controller to obtain the current temperature information of the current switching power supply of the magnetic suspension bearing controller, which comprises that the acquisition unit 102 is specifically further configured to acquire the power panel temperature detected by the temperature detection module arranged on the power panel of the power supply of the magnetic suspension bearing controller, and convert the power panel temperature into voltage information as the current temperature information of the current switching power supply of the magnetic suspension bearing controller. Figure 5 In the example shown in the figure, the over-temperature detection unit is, for example, a temperature detection logic circuit. Figure 7 For the structure of an embodiment of the temperature detection logic circuit in the power supply multi-dimension detection and control device of the magnetic suspension bearing controller of the magnetic suspension compressor of the present application. As shown in the figure, Figure 7As shown, the temperature detection logic circuit comprises a PT resistor, a resistor 1, a resistor 2, a resistor 3, a resistor 4, and a voltage comparator. The PT resistor and the resistor 1 are connected in series and then connected in parallel to both ends of the power supply. The resistor 2 and the resistor 3 are connected in series and then connected in parallel to both ends of the power supply. The common end of the PT resistor and the resistor 1 and the common end of the resistor 2 and the resistor 3 are connected to the first input end of the voltage comparator. The second input end of the voltage comparator is used to input a reference voltage (VEF) of the power supply at a rated working temperature.

[0078] In Figure 7 As shown in the example, the temperature detection logic circuit is composed of a power supply, a PT resistor, three constant resistance resistors (such as a resistor 1, a resistor 2, and a resistor 3), and a voltage comparator. The four resistors form a bridge circuit (i.e., a bridge), which serves as the temperature detection logic circuit. The resistance value of the PT resistor built in the temperature detection logic circuit decreases with the increase of temperature, and then the voltage difference between both sides of the bridge gradually increases. The temperature detection logic circuit serves as a temperature sensor, and the temperature sensor collects temperatures T1, T2,..., TN (N is a natural number) of N points on the power board of the power supply. When the temperature sensor senses that a certain temperature increases to a preset temperature protection threshold, the voltage between both ends of the bridge exceeds the reference voltage of the power supply at the rated working temperature, and the temperature detection logic circuit outputs an abnormal signal to the first input end of the AND logic gate circuit (i.e., the No. 1 pin of the AND logic gate circuit).

[0079] In some embodiments, the acquisition unit 102 acquires the noise emitted by the current switching power supply of the magnetic suspension bearing controller to obtain current noise information of the current switching power supply of the magnetic suspension bearing controller, including: the acquisition unit 102 is specifically further configured to acquire the noise in the electric appliance box detected by the noise detection module arranged in the power supply box of the power supply of the magnetic suspension bearing controller, and convert the noise in the electric appliance box into frequency domain after Fourier transform to obtain the sound vibration frequency as the current noise information of the current switching power supply of the magnetic suspension bearing controller.

[0080] In Figure 5 As shown in the example, the sound frequency detection unit can adopt a noise detection logic circuit. Figure 6 It is an embodiment of the structure of the noise detection logic circuit in the power supply multi-dimensional detection and control device of the magnetic suspension bearing controller of the magnetic suspension compressor of the application. As shown in Figure 6 As shown, the noise detection logic circuit comprises a sound frequency detection module, an FFT module, and a frequency comparator. The power supply 1 and the power supply 2 are input to the first input end of the frequency comparator after the sound frequency detection module and the FFT module, the second input end of the frequency comparator inputs the working frequency (FEF) of the power supply at the rated working temperature, and the output end of the frequency comparator is output to the second input end of the AND gate logic circuit.

[0081] In Figure 6 In the example shown, the sound frequency detection module is composed of a noise sensor, which is applied to the electrical appliance boxes of the power supply 1 and the power supply 2 and is stored in a sealed space, so that the influence of external noise can be effectively hindered. At the same time, the noise information detected by the noise sensor is subjected to Fourier transform by the FFT module to detect the frequency of the sound vibration. If there is no fault, the detected frequency of the sound vibration will be a periodic waveform within a specified range. If the detected frequency of the sound vibration is greater than the working frequency under the rated working temperature of the power supply, the sound frequency detection unit outputs an abnormal signal to the second input end of the logic gate circuit (i.e., the No. 2 pin of the logic gate circuit). Among them, when the power supply is abnormal, the sound frequency of the power supply is relatively high, and the sound frequency of the external noise is relatively low. After Fourier transform, the waveform of the low-frequency external noise is relatively smooth and can be ignored.

[0082] Preferably, the noise detection module includes a sound sensor with a built-in capacitive electret microphone, for example, in the noise detection logic circuit, the sound sensor is built-in a sound-sensitive capacitive electret microphone. The temperature detection module includes a temperature sensor with a built-in PT resistor. Specifically, Figure 8 The linear relationship between the voltage and the temperature of the temperature detection logic circuit in the power supply multi-dimensional detection and control device of the magnetic suspension bearing controller of the magnetic suspension compressor is shown in the schematic diagram. As Figure 8 , Figure 8 The voltage-temperature linear relationship schematic diagram of the temperature detection logic circuit. The principle is that the resistance value of the PT resistor decreases as the temperature rises, thereby causing a change in the voltage across the bridge. The voltage and the temperature show a linear increase relationship. The higher the temperature, the higher the voltage. Therefore, the real-time power supply temperature can be determined through the voltage-temperature linear relationship schematic diagram.

[0083] The control unit 104 is also configured to determine whether the current switching power supply of the magnetic suspension bearing controller has failed according to the current temperature information of the current switching power supply of the magnetic suspension bearing controller and the current noise information of the current switching power supply of the magnetic suspension bearing controller. The specific functions and processes of the control unit 104 are also referred to step S130.

[0084] In some embodiments, the control unit 104 determines whether the current switching power supply of the magnetic suspension bearing controller has failed according to the current temperature information of the current switching power supply of the magnetic suspension bearing controller and the current noise information of the current switching power supply of the magnetic suspension bearing controller, including:

[0085] The control unit 104 is further configured to determine the reference voltage of the current switching power supply of the magnetic suspension bearing controller at the rated operating temperature, and determine the operating frequency of the current switching power supply of the magnetic suspension bearing controller at the rated operating temperature. The specific functions and processes of the control unit 104 are also described in step S210.

[0086] The control unit 104 is further configured to determine whether the voltage information corresponding to the current temperature information of the current switching power supply of the magnetic suspension bearing controller is greater than or equal to the reference voltage of the current switching power supply of the magnetic suspension bearing controller at the rated operating temperature, and the sound vibration frequency corresponding to the current noise information of the current switching power supply of the magnetic suspension bearing controller is greater than or equal to the operating frequency of the current switching power supply of the magnetic suspension bearing controller at the rated operating temperature. The specific functions and processes of the control unit 104 are also described in step S220.

[0087] The control unit 104 is further configured to determine that the current switching power supply of the magnetic suspension bearing controller has failed if the condition is met, and determine that the current switching power supply of the magnetic suspension bearing controller has not failed if the condition is not met. The specific functions and processes of the control unit 104 are also described in step S230.

[0088] Specifically, Figure 9 A flowchart of an embodiment of a power supply multi-dimensional detection and control method for a magnetic suspension bearing controller of a magnetic suspension compressor of the present application is shown in FIG. 2. As shown in FIG. 2, the power supply multi-dimensional detection and control device for the magnetic suspension bearing controller of the magnetic suspension compressor according to the present application includes: Figure 9 The power supply multi-dimensional detection and control device for the magnetic suspension bearing controller of the magnetic suspension compressor according to the present application includes:

[0089] Step S1, in the initial state, the power supply 1 is powered, that is, the power supply 1 supplies power to the magnetic suspension bearing controller of the magnetic suspension compressor. Since the temperature detection logic circuit and the noise detection logic circuit detect the power supply 1, the power supply 1 also supplies power to the temperature detection logic circuit and the noise detection logic circuit. Then, step S2 is executed.

[0090] Step S2, the temperature detection logic circuit and the noise detection logic circuit detect whether the power supply 1 is abnormal: if yes, step S4 is executed, otherwise, step S3 is executed, that is, the CPU works normally. The CPU is only the overall control chip of the switching power supply.

[0091] Wherein, in detecting whether the power supply 1 has an abnormality, the resistance value of the PT resistance built-in in the temperature detection logic circuit decreases with the temperature rising, then the voltage difference between the two sides of the bridge gradually increases, the temperature sensor collects the temperature T1, T2,..., TN (N is a natural number) of N points on the power supply board of the power supply, when the temperature sensor senses that a certain temperature rises to the preset temperature protection threshold, the voltage between the two ends of the bridge exceeds the reference voltage under the rated working temperature of the power supply, the temperature detection logic circuit outputs an abnormal signal to the first input end of the AND logic gate circuit (i.e. the No. 1 pin of the AND logic gate circuit). In the noise detection logic circuit, a sound-sensitive capacitive electret microphone is built-in in the sound sensor, the sound wave makes the electret film in the capacitive electret microphone vibrate, resulting in the change of the capacitance, and a voltage corresponding thereto is generated, the frequency of the sound vibration is detected through Fourier transform, if there is no fault, the detected frequency of the sound vibration will be a periodic waveform within the specified range, if the detected frequency of the sound vibration is greater than the working frequency under the rated working temperature of the power supply, the sound frequency detection unit outputs an abnormal signal to the second input end of the AND logic gate circuit (i.e. the No. 2 pin of the AND logic gate circuit). The logic gate uses the AND logic gate circuit, the characteristic of the AND gate logic circuit is that when the input is all 1, the output is 1; otherwise, the output is 0. Therefore, only when both the two power supply detection modules (i.e. the temperature detection logic circuit and the noise detection logic circuit) output abnormals, the AND gate logic circuit outputs a control signal to control the closing and opening of the switch (such as the single-pole double-throw switch in Figure 5 When the AND logic gate circuit does not detect an abnormal signal or detects only one abnormal signal, step S3 is performed to output 0, and the power supply 1 normally supplies power; when the AND logic gate circuit detects two abnormal signals, step S4 is performed. Referring to the example shown in Figure 5 The single-pole double-throw switch has a first connection end, a second connection end and a control end, the first connection end of the single-pole double-throw switch is connected to the power supply 1, the second connection end of the single-pole double-throw switch is connected to the power supply 2, and the control end of the single-pole double-throw switch is connected to the control signal output end of the CPU.

[0092] Step S4, the AND logic gate circuit outputs 1, at this time the power supply 1 is disconnected, the switch is connected to the power supply 2, and the power supply 2 supplies power, i.e. the power supply 2 supplies power to the magnetic suspension bearing controller of the magnetic suspension compressor. Since the temperature detection logic circuit and the noise detection logic circuit detect the power supply 2, the power supply 2 also supplies power to the temperature detection logic circuit and the noise detection logic circuit. Then, step S5 is performed.

[0093] The control unit 104 is further configured to, if it is determined that the current switching power supply of the magnetic suspension bearing controller has failed, switch the current switching power supply of the magnetic suspension bearing controller to another switching power supply among the first switching power supply and the second switching power supply other than the current switching power supply of the magnetic suspension bearing controller, to control the other switching power supply among the first switching power supply and the second switching power supply to supply power to the magnetic suspension bearing controller. The specific functions and processes of the control unit 104 are also described in step S140.

[0094] The control unit 104 is further configured to, if it is determined that the current switching power supply of the magnetic suspension bearing controller has failed, switch the current switching power supply of the magnetic suspension bearing controller to another switching power supply among the first switching power supply and the second switching power supply other than the current switching power supply of the magnetic suspension bearing controller, to control the other switching power supply among the first switching power supply and the second switching power supply to supply power to the magnetic suspension bearing controller. The specific functions and processes of the control unit 104 are also described in step S140.

[0095] As shown in Figure 5 The power supply multi-dimensional detection and control device of the magnetic suspension bearing controller of the magnetic suspension compressor further comprises a switching power supply of the magnetic suspension bearing controller of the magnetic suspension compressor, a sound receiver, a PT resistance, an over-temperature detection unit, a sound frequency detection unit, an AND logic circuit, and a CPU. The PT resistance is a platinum resistance, and the resistance value of the platinum resistance changes with temperature. The switching power supply comprises a power supply 1 and a power supply 2, and the power supply 1 and the power supply 2 form a redundant structure and are redundant power supplies of each other. After the PT resistance samples the temperature information of the switching power supply of the magnetic suspension bearing controller, the first detection result is obtained after detection by the over-temperature detection unit, and the first detection result is input to the first input end of the AND logic module. After the sound receiver samples the noise information of the switching power supply of the magnetic suspension bearing controller, the second detection result is obtained after detection by the sound frequency detection unit, and the second detection result is transmitted to the second input end of the AND logic circuit. The AND logic circuit outputs a signal indicating normal switching power supply or abnormal switching power supply based on the first detection result and the second detection result. The CPU controls the power supply 1 and the power supply 2 in the switching power supply correspondingly based on the signal indicating normal switching power supply or abnormal switching power supply, such as switching to the power supply 2 for power supply when the power supply 1 is abnormal, to realize stable power supply of the magnetic suspension bearing controller of the magnetic suspension compressor and reduce damage to the magnetic suspension compressor.

[0096] Although two power supplies are used in the related scheme, only the magnetic suspension bearing of the magnetic suspension compressor is detected from the displacement dimension, and the drop protection branch works in the displacement abnormal condition. The scheme of the present application mainly detects the temperature and sound of the power supply in two dimensions. Detecting from two dimensions is beneficial to increase the reliability of the detection result. Once one power supply is abnormal, the other power supply is replaced immediately. The power supply redundancy structure effectively reduces the risk of magnetic suspension bearing abrasion of the magnetic suspension compressor, and protects the magnetic suspension bearing of the magnetic suspension compressor.

[0097] The scheme of the present application proposes a multi-dimensional detection and control device for the power supply of the magnetic suspension bearing controller of the magnetic suspension compressor. The power supply of the magnetic suspension bearing controller adopts a switching power supply, and the switching power supply adopts a redundant structure and is provided with a redundant power supply. By adding a temperature sensor and a sound sensor, the temperature sensor and the sound sensor and the control chip of the magnetic suspension bearing controller form a detection and control circuit. The temperature and sound of the magnetic suspension bearing controller are detected and judged from multiple dimensions such as temperature and sound. When it is judged that the power supply of the magnetic suspension bearing controller fails, the failure of the power supply of the magnetic suspension bearing controller is fed back to the magnetic suspension bearing controller. The control chip of the magnetic suspension bearing controller switches the power supply mode from the current power supply to the redundant power supply, so as to ensure the normal operation of the magnetic suspension bearing controller. In this way, through the multi-dimensional detection of the power supply of the magnetic suspension bearing controller, the failure is monitored and detected in real time, the redundant power supply is intelligently switched, the detection of the misjudgment failure and the missed failure of the power supply of the magnetic suspension bearing controller and the high temperature condition is effectively protected, the redundant power supply is intelligently switched, the stable power supply of the magnetic suspension bearing controller can be continuously obtained, and the safety and reliability of the power supply of the magnetic suspension bearing controller are improved. Therefore, the problem that when the magnetic suspension compressor works, the power supply of the magnetic suspension bearing controller suddenly fails, the power supply of the magnetic suspension bearing controller cannot be stably powered, and the rotor of the magnetic suspension compressor is unstable and the magnetic suspension compressor is damaged is solved.

[0098] In some embodiments, the power supply control device of the magnetic suspension bearing controller according to the scheme of the present application further comprises a process of detecting and determining whether another switching power supply has appeared abnormal, specifically as follows:

[0099] The control unit 104 is further configured to, after controlling another one of the first switching power supply and the second switching power supply to supply power to the magnetic suspension bearing controller, record the other one of the first switching power supply and the second switching power supply currently supplying power to the magnetic suspension bearing controller as a new current switching power supply of the magnetic suspension bearing controller. The specific functions and processes of the control unit 104 are also described in step S310.

[0100] The acquisition unit 102 is further configured to, in the case that the new current switching power supply of the magnetic suspension bearing controller is powered, detect the power panel temperature of the new current switching power supply of the magnetic suspension bearing controller to obtain the current temperature information of the new current switching power supply of the magnetic suspension bearing controller, and detect the noise emitted by the new current switching power supply of the magnetic suspension bearing controller to obtain the current noise information of the new current switching power supply of the magnetic suspension bearing controller. The specific functions and processes of the control unit 104 will also be described in step S320.

[0101] The control unit 104 is further configured to determine whether the new current switching power supply of the magnetic suspension bearing controller has failed according to the current temperature information of the new current switching power supply of the magnetic suspension bearing controller and the current noise information of the new current switching power supply of the magnetic suspension bearing controller. The specific functions and processes of the control unit 104 will also be described in step S330. Wherein, the specific way of determining whether the new current switching power supply of the magnetic suspension bearing controller has failed according to the current temperature information of the new current switching power supply of the magnetic suspension bearing controller and the current noise information of the new current switching power supply of the magnetic suspension bearing controller is the same as the specific way of determining whether the current switching power supply of the magnetic suspension bearing controller has failed according to the current temperature information of the current switching power supply of the magnetic suspension bearing controller and the current noise information of the current switching power supply of the magnetic suspension bearing controller.

[0102] The control unit 104 is further configured to, if it is determined that the new current switching power supply of the magnetic suspension bearing controller has failed, determine that the power supply of the magnetic suspension bearing controller has failed, i.e., it is determined that both the first switching power supply and the second switching power supply have failed, control the magnetic suspension bearing controller to be powered off, and initiate a reminder message that the power supply of the magnetic suspension bearing controller needs to be replaced. The specific functions and processes of the control unit 104 will also be described in step S340.

[0103] The control unit 104 is further configured to, if it is determined that the new current switching power supply of the magnetic suspension bearing controller has not failed, continue to control the new current switching power supply of the magnetic suspension bearing controller to power the magnetic suspension bearing controller. The specific functions and processes of the control unit 104 will also be described in step S350.

[0104] Specifically, as Figure 9As shown, the power supply multi-dimensional detection and control device of the magnetic suspension bearing controller of the magnetic suspension compressor provided by the scheme of the present application further comprises: step S5, detecting whether the power supply 2 is abnormal by the temperature detection logic circuit and the noise detection logic circuit; if yes, step S7 is performed, otherwise, step S6, i.e., the CPU normally works, is performed.

[0105] In the detection of whether the power supply 2 is abnormal, the resistance value of the PT resistor built in the temperature detection logic circuit decreases with the increase of temperature, and the voltage difference on both sides of the bridge gradually increases. The temperature sensor collects the temperatures T1, T2,..., TN (N is a natural number) of N points on the power supply board of the power supply. When the temperature sensor senses that a certain temperature increases to a preset temperature protection threshold, the voltage on both ends of the bridge exceeds the reference voltage at the rated working temperature of the power supply, and the temperature detection logic circuit outputs an abnormal signal to the first input end (i.e., the No. 1 pin) of the AND logic gate circuit. In the noise detection logic circuit, the sound sensor is built with a capacitive electret microphone sensitive to sound. The sound wave makes the electret film in the capacitive electret microphone vibrate, resulting in the change of the capacitance and the generation of a voltage corresponding thereto. The frequency of the sound vibration is detected by Fourier transform. If there is no fault, the detected frequency of the sound vibration will be a periodic waveform within a specified range. If the detected frequency of the sound vibration is greater than the working frequency at the rated working temperature of the power supply, the sound frequency detection unit outputs an abnormal signal to the second input end (i.e., the No. 2 pin) of the AND logic gate circuit. The logic gate uses the AND logic gate circuit. The AND gate logic circuit has the characteristic that when the input is all 1, the output is 1; otherwise, the output is 0. Therefore, only when both power supply detection modules (i.e., the temperature detection logic circuit and the noise detection logic circuit) output an abnormality, the AND gate logic circuit outputs a control signal to control the closing and opening of the switch. When the AND logic gate circuit does not detect an abnormal signal or detects only one abnormal signal, step S6 is performed, i.e., 0 is output, and the power supply 2 normally supplies power; when the AND logic gate circuit detects two abnormal signals, step S7 is performed, i.e., the power supply is replaced.

[0106] In the scheme of the present application, the switching power supply, i.e., the power supply 1 and the power supply 2, adopts a redundant structure. By adding a sound sensor and a corresponding bridge circuit as a temperature sensor, and combining Fourier transform to form two detection circuits (i.e., the temperature detection logic circuit and the noise detection logic circuit), the first power supply is stopped when both detection circuits output an abnormality, and the next power supply is used for power supply, thereby improving the safety and reliability of the power supply of the magnetic suspension bearing controller and ensuring the normal operation of the magnetic suspension bearing controller.

[0107] Since the processing and functions realized by the device of the present embodiment are basically corresponding to the embodiments, principles and examples of the foregoing method, the description of the present embodiment will not be described in detail, and the relevant description in the foregoing embodiments can be referred to, which will not be described herein.

[0108] According to the technical scheme, the first switching power supply and the second switching power supply are arranged for the power supply of the magnetic suspension bearing controller of the magnetic suspension compressor, and the first switching power supply and the second switching power supply are arranged in a redundant structure; the temperature detection logic circuit and the noise detection logic circuit are arranged for the power supply of the magnetic suspension bearing controller of the magnetic suspension compressor; the temperature detection logic circuit can detect the temperature information of the power supply of the magnetic suspension bearing controller of the magnetic suspension compressor, convert the detected temperature information of the power supply of the magnetic suspension bearing controller of the magnetic suspension compressor into a voltage, compare the voltage with a reference voltage of the power supply under a rated working temperature, and output a temperature abnormality signal if the voltage exceeds the reference voltage of the power supply under the rated working temperature; the noise detection logic circuit can detect noise information of the power supply of the magnetic suspension bearing controller of the magnetic suspension compressor, obtain a noise frequency through Fourier transform of the detected noise information of the power supply of the magnetic suspension bearing controller of the magnetic suspension compressor, compare the noise frequency with a working frequency of the power supply under the rated working temperature, and output a sound abnormality signal if the noise frequency exceeds the working frequency of the power supply under the rated working temperature; the control chip of the magnetic suspension bearing controller of the magnetic suspension compressor determines that the current switching power supply in the power supply of the magnetic suspension bearing controller of the magnetic suspension compressor is abnormal when receiving the temperature abnormality signal and the sound abnormality signal, switches the current switching power supply in the power supply of the magnetic suspension bearing controller of the magnetic suspension compressor to another switching power supply, and makes the other switching power supply supply power to the magnetic suspension bearing controller of the magnetic suspension compressor, so as to realize stable power supply of the magnetic suspension bearing controller of the magnetic suspension compressor and reduce damage to the magnetic suspension compressor.

[0109] According to the embodiment of the present application, a magnetic suspension bearing controller corresponding to the power supply control device of the magnetic suspension bearing controller is also provided. The magnetic suspension bearing controller can include the power supply control device of the magnetic suspension bearing controller described above.

[0110] Since the processing and functions realized by the magnetic suspension bearing controller of the present embodiment are basically corresponding to the embodiments, principles and examples of the foregoing device, the description of the present embodiment will not be described in detail, and the related description in the foregoing embodiments can be referred to, which will not be described herein.

[0111] The technical scheme of the present application is characterized in that: a first switching power supply and a second switching power supply are arranged for the power supply of the magnetic suspension bearing controller of the magnetic suspension compressor, and the first switching power supply and the second switching power supply are arranged in a redundant structure; a temperature detection logic circuit and a noise detection logic circuit are arranged for the power supply of the magnetic suspension bearing controller of the magnetic suspension compressor; the temperature detection logic circuit can detect the temperature information of the power supply of the magnetic suspension bearing controller of the magnetic suspension compressor, convert the detected temperature information of the power supply of the magnetic suspension bearing controller of the magnetic suspension compressor into a voltage, compare the voltage with a reference voltage of the power supply under a rated working temperature, and output a temperature abnormality signal if the voltage exceeds the reference voltage of the power supply under the rated working temperature; the noise detection logic circuit can detect the noise information of the power supply of the magnetic suspension bearing controller of the magnetic suspension compressor, obtain a noise frequency through Fourier transform of the detected noise information of the power supply of the magnetic suspension bearing controller of the magnetic suspension compressor, compare the noise frequency with a working frequency of the power supply under the rated working temperature, and output a sound abnormality signal if the noise frequency exceeds the working frequency of the power supply under the rated working temperature; the control chip of the magnetic suspension bearing controller of the magnetic suspension compressor determines that the current switching power supply in the power supply of the magnetic suspension bearing controller of the magnetic suspension compressor is abnormal when receiving the temperature abnormality signal and the sound abnormality signal, switches the current switching power supply in the power supply of the magnetic suspension bearing controller of the magnetic suspension compressor to another switching power supply, and makes the other switching power supply supply power to the magnetic suspension bearing controller of the magnetic suspension compressor, thereby intelligently switching the redundant power supply, effectively ensuring that the magnetic suspension bearing controller can continuously obtain stable power supply, and improving the safety and reliability of the power supply of the magnetic suspension bearing controller.

[0112] According to the embodiment of the present application, a storage medium corresponding to the power supply control method of the magnetic suspension bearing controller is also provided, and the storage medium comprises a stored program, wherein when the program runs, the device where the storage medium is located executes the power supply control method of the magnetic suspension bearing controller.

[0113] Since the processing and functions realized by the storage medium of the present embodiment are basically corresponding to the embodiments, principles and examples of the foregoing method, the description of the present embodiment is not detailed, and the relevant description in the foregoing embodiments can be referred to, which is not repeated here.

[0114] The technical scheme of the present application is characterized in that: a first switching power supply and a second switching power supply are arranged for the power supply of the magnetic suspension bearing controller of the magnetic suspension compressor, and the first switching power supply and the second switching power supply are arranged in a redundant structure; a temperature detection logic circuit and a noise detection logic circuit are arranged for the power supply of the magnetic suspension bearing controller of the magnetic suspension compressor; the temperature detection logic circuit can detect the temperature information of the power supply of the magnetic suspension bearing controller of the magnetic suspension compressor, convert the detected temperature information of the power supply of the magnetic suspension bearing controller of the magnetic suspension compressor into a voltage, compare the voltage with a reference voltage of the power supply under a rated working temperature, and output a temperature abnormality signal if the voltage exceeds the reference voltage of the power supply under the rated working temperature; the noise detection logic circuit can detect the noise information of the power supply of the magnetic suspension bearing controller of the magnetic suspension compressor, obtain a noise frequency through Fourier transform of the detected noise information of the power supply of the magnetic suspension bearing controller of the magnetic suspension compressor, compare the noise frequency with a working frequency of the power supply under the rated working temperature, and output a sound abnormality signal if the noise frequency exceeds the working frequency of the power supply under the rated working temperature; the control chip of the magnetic suspension bearing controller of the magnetic suspension compressor determines that the current switching power supply in the power supply of the magnetic suspension bearing controller of the magnetic suspension compressor is abnormal when receiving the temperature abnormality signal and the sound abnormality signal, switches the current switching power supply in the power supply of the magnetic suspension bearing controller of the magnetic suspension compressor to another switching power supply, and makes the other switching power supply supply power to the magnetic suspension bearing controller of the magnetic suspension compressor, thereby improving the safety and reliability of the power supply of the magnetic suspension bearing controller and ensuring the normal operation of the magnetic suspension bearing controller.

[0115] In summary, those skilled in the art can easily understand that the above-mentioned advantageous modes can be freely combined and superimposed without conflict.

[0116] The above only describes the embodiments of the present application and is not intended to limit the present application. Those skilled in the art can make various modifications and changes to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the scope of the claims of the present application.

Claims

1. A power supply control method of a magnetic bearing controller, characterized by, The power supply of the magnetic suspension bearing controller comprises a first switching power supply and a second switching power supply; the first switching power supply and the second switching power supply are redundant power supplies; the power supply control method of the magnetic suspension bearing controller comprises: In the case that the magnetic suspension bearing controller needs power supply, one of the first switching power supply and the second switching power supply is controlled to supply power to the magnetic suspension bearing controller; the one of the first switching power supply and the second switching power supply currently supplying power to the magnetic suspension bearing controller is recorded as the current switching power supply of the magnetic suspension bearing controller; In the case that the current switching power supply of the magnetic suspension bearing controller supplies power to the magnetic suspension bearing controller, the power panel temperature of the current switching power supply of the magnetic suspension bearing controller is acquired to obtain the current temperature information of the current switching power supply of the magnetic suspension bearing controller; and the noise emitted by the current switching power supply of the magnetic suspension bearing controller is acquired to obtain the current noise information of the current switching power supply of the magnetic suspension bearing controller; According to the current temperature information of the current switching power supply of the magnetic suspension bearing controller and the current noise information of the current switching power supply of the magnetic suspension bearing controller, it is determined whether the current switching power supply of the magnetic suspension bearing controller has failed; If it is determined that the current switching power supply of the magnetic suspension bearing controller has failed, the current switching power supply of the magnetic suspension bearing controller is switched to another switching power supply of the first switching power supply and the second switching power supply except the current switching power supply of the magnetic suspension bearing controller, so as to control the other switching power supply of the first switching power supply and the second switching power supply to supply power to the magnetic suspension bearing controller; If it is determined that the current switching power supply of the magnetic suspension bearing controller has not failed, the current switching power supply of the magnetic suspension bearing controller continues to supply power to the magnetic suspension bearing controller.

2. The power supply control method of a magnetic bearing controller according to claim 1, characterized by, Wherein, The power panel temperature of the current switching power supply of the magnetic suspension bearing controller is acquired to obtain the current temperature information of the current switching power supply of the magnetic suspension bearing controller, which comprises: The power panel temperature detected by a temperature detection module arranged on the power panel of the power supply of the magnetic suspension bearing controller is acquired, and the power panel temperature is converted into voltage information as the current temperature information of the current switching power supply of the magnetic suspension bearing controller; And / or, The noise emitted by the current switching power supply of the magnetic suspension bearing controller is acquired to obtain the current noise information of the current switching power supply of the magnetic suspension bearing controller, which comprises: The noise in the electric appliance box detected by a noise detection module arranged in the power box of the power supply of the magnetic suspension bearing controller is acquired, and the noise in the electric appliance box is subjected to Fourier transform, so that the signal of the noise in the electric appliance box is converted from time domain to frequency domain to obtain the sound vibration frequency as the current noise information of the current switching power supply of the magnetic suspension bearing controller.

3. The power supply control method of a magnetic bearing controller according to claim 2, characterized by, Wherein, The noise detection module comprises a sound sensor with a capacitive electret microphone built-in; The temperature detection module comprises a temperature sensor with a PT resistor built-in.

4. The method of power supply control for a magnetic bearing controller according to claim 1, wherein, According to the current temperature information of the current switching power supply of the magnetic suspension bearing controller and the current noise information of the current switching power supply of the magnetic suspension bearing controller, it is determined whether the current switching power supply of the magnetic suspension bearing controller has failed, comprising: Determine the reference voltage of the current switching power supply of the magnetic suspension bearing controller at the rated working temperature, and determine the working frequency of the current switching power supply of the magnetic suspension bearing controller at the rated working temperature; Determine whether the following conditions are met: the voltage information corresponding to the current temperature information of the current switching power supply of the magnetic suspension bearing controller is greater than or equal to the reference voltage of the current switching power supply of the magnetic suspension bearing controller at the rated working temperature; and the sound vibration frequency corresponding to the current noise information of the current switching power supply of the magnetic suspension bearing controller is greater than or equal to the working frequency of the current switching power supply of the magnetic suspension bearing controller at the rated working temperature; If yes, it is determined that the current switching power supply of the magnetic suspension bearing controller has failed; if no, it is determined that the current switching power supply of the magnetic suspension bearing controller has not failed.

5. The power supply control method of a magnetic bearing controller according to any one of claims 1 to 4, characterized by, Further comprising: After controlling the other one of the first switching power supply and the second switching power supply to supply power to the magnetic suspension bearing controller, the other one of the first switching power supply and the second switching power supply currently supplying power to the magnetic suspension bearing controller is recorded as the new current switching power supply of the magnetic suspension bearing controller; Under the power supply of the new current switching power supply of the magnetic suspension bearing controller, the power panel temperature of the new current switching power supply of the magnetic suspension bearing controller is detected to obtain the current temperature information of the new current switching power supply of the magnetic suspension bearing controller; and the noise emitted by the new current switching power supply of the magnetic suspension bearing controller is detected to obtain the current noise information of the new current switching power supply of the magnetic suspension bearing controller; According to the current temperature information of the new current switching power supply of the magnetic suspension bearing controller and the current noise information of the new current switching power supply of the magnetic suspension bearing controller, it is determined whether the new current switching power supply of the magnetic suspension bearing controller has failed; If it is determined that the new current switching power supply of the magnetic suspension bearing controller has failed, it is determined that the power supply of the magnetic suspension bearing controller has failed, the power supply of the magnetic suspension bearing controller is controlled to be powered off, and a prompt message is initiated to replace the power supply of the magnetic suspension bearing controller; If it is determined that the new current switching power supply of the magnetic suspension bearing controller has not failed, the new current switching power supply of the magnetic suspension bearing controller continues to supply power to the magnetic suspension bearing controller.

6. A power supply control device for a magnetic bearing controller, characterized by comprising: The power supply of the magnetic suspension bearing controller comprises a first switching power supply and a second switching power supply; the first switching power supply and the second switching power supply are redundant power supplies; the power supply control device of the magnetic suspension bearing controller comprises: The control unit is configured to control one of the first switching power supply and the second switching power supply to supply power to the magnetic suspension bearing controller when the magnetic suspension bearing controller needs to be powered; and record the one of the first switching power supply and the second switching power supply currently supplying power to the magnetic suspension bearing controller as the current switching power supply of the magnetic suspension bearing controller. The acquisition unit is configured to acquire the power panel temperature of the current switching power supply of the magnetic suspension bearing controller to obtain current temperature information of the current switching power supply of the magnetic suspension bearing controller when the current switching power supply of the magnetic suspension bearing controller supplies power to the magnetic suspension bearing controller; and acquire the noise emitted by the current switching power supply of the magnetic suspension bearing controller to obtain current noise information of the current switching power supply of the magnetic suspension bearing controller. The control unit is further configured to determine whether the current switching power supply of the magnetic suspension bearing controller has failed according to the current temperature information of the current switching power supply of the magnetic suspension bearing controller and the current noise information of the current switching power supply of the magnetic suspension bearing controller. The control unit is further configured to switch the current switching power supply of the magnetic suspension bearing controller to another switching power supply of the first switching power supply and the second switching power supply other than the current switching power supply of the magnetic suspension bearing controller to control the other switching power supply of the first switching power supply and the second switching power supply to supply power to the magnetic suspension bearing controller if it is determined that the current switching power supply of the magnetic suspension bearing controller has failed. The control unit is further configured to continue to control the current switching power supply of the magnetic suspension bearing controller to supply power to the magnetic suspension bearing controller if it is determined that the current switching power supply of the magnetic suspension bearing controller has not failed.

7. The power supply control device for a magnetic bearing controller according to claim 6, wherein The acquisition unit acquires the power panel temperature of the current switching power supply of the magnetic suspension bearing controller to obtain current temperature information of the current switching power supply of the magnetic suspension bearing controller, including: The temperature detection module detects the power panel temperature and converts the power panel temperature into voltage information as the current temperature information of the current switching power supply of the magnetic suspension bearing controller. And / or The acquisition unit acquires the noise emitted by the current switching power supply of the magnetic suspension bearing controller to obtain current noise information of the current switching power supply of the magnetic suspension bearing controller, including: The noise detection module detects the noise in the power box and converts the noise in the power box into a signal in the frequency domain through Fourier transform to obtain the sound vibration frequency as the current noise information of the current switching power supply of the magnetic suspension bearing controller. The noise detection module includes a sound sensor with a capacitive electret microphone.

8. The power supply control device of a magnetic bearing controller according to claim 7, wherein The temperature detection module includes a temperature sensor with a PT resistor. ​ ​ 9. The power supply control device for a magnetic bearing controller according to claim 6, wherein The control unit determines whether the current switching power supply of the magnetic suspension bearing controller has failed according to current temperature information of the current switching power supply of the magnetic suspension bearing controller and current noise information of the current switching power supply of the magnetic suspension bearing controller, including: determining the reference voltage of the current switching power supply of the magnetic suspension bearing controller at the rated working temperature and determining the working frequency of the current switching power supply of the magnetic suspension bearing controller at the rated working temperature; determining whether the voltage information corresponding to the current temperature information of the current switching power supply of the magnetic suspension bearing controller is greater than or equal to the reference voltage of the current switching power supply of the magnetic suspension bearing controller at the rated working temperature and whether the sound vibration frequency corresponding to the current noise information of the current switching power supply of the magnetic suspension bearing controller is greater than or equal to the working frequency of the current switching power supply of the magnetic suspension bearing controller at the rated working temperature; if yes, determining that the current switching power supply of the magnetic suspension bearing controller has failed; if no, determining that the current switching power supply of the magnetic suspension bearing controller has not failed.

10. The power supply control device of a magnetic bearing controller according to any one of claims 6 to 9, characterized by, Further comprising: The control unit is further configured to, after controlling the other one of the first switching power supply and the second switching power supply to supply power to the magnetic suspension bearing controller, record the other one of the first switching power supply and the second switching power supply currently supplying power to the magnetic suspension bearing controller as the new current switching power supply of the magnetic suspension bearing controller; The acquisition unit is further configured to, under the power supply of the new current switching power supply of the magnetic suspension bearing controller, detect the power board temperature of the new current switching power supply of the magnetic suspension bearing controller to obtain the current temperature information of the new current switching power supply of the magnetic suspension bearing controller, and detect the noise emitted by the new current switching power supply of the magnetic suspension bearing controller to obtain the current noise information of the new current switching power supply of the magnetic suspension bearing controller; The control unit is further configured to determine whether the new current switching power supply of the magnetic suspension bearing controller has failed according to the current temperature information of the new current switching power supply of the magnetic suspension bearing controller and the current noise information of the new current switching power supply of the magnetic suspension bearing controller; The control unit is further configured to, if it is determined that the new current switching power supply of the magnetic suspension bearing controller has failed, determine that the power supply of the magnetic suspension bearing controller has failed, control the magnetic suspension bearing controller to be powered off, and initiate a prompt message that the power supply of the magnetic suspension bearing controller needs to be replaced; The control unit is further configured to, if it is determined that the new current switching power supply of the magnetic suspension bearing controller has not failed, continue to control the new current switching power supply of the magnetic suspension bearing controller to supply power to the magnetic suspension bearing controller.

11. A magnetic bearing controller characterized by comprising: Comprising: The power supply control device of the magnetic suspension bearing controller according to any one of claims 6 to 10.

12. A storage medium, characterized by The storage medium includes a stored program, wherein the program, when executed, controls a device in which the storage medium is located to perform the power supply control method of the magnetic bearing controller of any one of claims 1 to 5.

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