Magnetic suspension controller current protection circuit

Abstract

The invention discloses a magnetic suspension controller current protection circuit, which relates to the field of electrical technology and comprises a detection circuit, a protection circuit, a reset circuit and a magnetic suspension controller, the detection circuit is respectively connected with an external power supply, the protection circuit and the reset circuit and is used for detecting input current and outputting a detection signal to the protection circuit and the reset circuit; the protection circuit is respectively connected with the detection circuit, the magnetic suspension controller and the reset circuit, and is used for receiving the detection signal output by the detection circuit, indicating that the current is abnormal in response to the detection signal, and disconnecting the input current flowing to the magnetic suspension controller; and the reset circuit is respectively connected with the detection circuit and the protection circuit, and is used for receiving the detection signal, indicating that the current returns to normal in response to the detection signal, and resetting the protection circuit. The magnetic suspension controller is protected from being damaged due to abnormal current, the service life of the magnetic suspension controller is prolonged, and the operation efficiency and stability of the magnetic suspension motor are improved.

Description

Technical Field

[0001] The present application relates to the field of electrical technology, and in particular to a current protection circuit for a magnetic levitation controller. Background Art

[0002] With the continuous progress of magnetic levitation technology, magnetic levitation motors have been widely adopted and applied in situations requiring high-speed rotation, low friction, low noise and long life due to their high efficiency, low noise characteristics and low maintenance costs. However, it cannot be ignored that the magnetic levitation controller is a key component for achieving stable suspension of the magnetic levitation system, and its performance directly affects the stability and reliability of the entire system. Therefore, the protection of the magnetic levitation controller is particularly critical and important. Summary of the invention

[0003] In view of this, the main purpose of the present application is to provide a current protection circuit for a magnetic levitation controller, the purpose of which is to switch the circuit in time when the current is abnormal to prevent the magnetic levitation controller from being damaged due to the abnormal current.

[0004] The present application provides a magnetic suspension controller current protection circuit, which includes: a detection circuit, a protection circuit, a reset circuit and a magnetic suspension controller;

[0005] The detection circuit is connected to the external power supply, the protection circuit, and the reset circuit respectively, and is used to detect the input current provided by the external power supply and output a detection signal to the protection circuit and the reset circuit;

[0006] The protection circuit is respectively connected to the detection circuit, the magnetic suspension controller, and the reset circuit, and is used to receive the detection signal output by the detection circuit, and disconnect the input current flowing to the magnetic suspension control machine in response to the detection signal indicating that the current is abnormal;

[0007] The reset circuit is connected to the detection circuit and the protection circuit respectively, and is used to receive the detection signal output by the detection circuit, and reset the protection circuit in response to the detection signal indicating that the current returns to normal.

[0008] Optionally, the detection circuit includes: a current sensor, a processing unit, a comparator and a reference circuit.

[0009] Optionally, the current sensor is connected to the external power supply and the processing unit respectively, and is used to perform signal detection on the input current provided by the external power supply;

[0010] The processing unit is connected to the current sensor and the comparator respectively, and is used for performing signal processing on the input current flowing through the current sensor;

[0011] The reference circuit is connected to the comparator and is used to provide a reference current for the comparator;

[0012] The comparator is connected to the processing unit, the protection circuit, the reference circuit and the reset circuit respectively, and is used to compare the input current flowing through the processing unit and the reference current, generate a detection signal, and output it to the protection circuit and the reset circuit.

[0013] Optionally, the processing unit includes: an amplifier and a filter.

[0014] Optionally, the amplifier is connected to the current sensor and the filter respectively, or the filter is connected to the current sensor and the amplifier respectively;

[0015] An amplifier for signal amplification of an input current;

[0016] Filter to remove noise from the input current.

[0017] Optionally, the protection circuit is an overcurrent protection circuit;

[0018] The overcurrent protection circuit is used to disconnect the input current in response to a detection signal indicating that the input current exceeds a safe value.

[0019] Optionally, the overcurrent protection circuit includes: a switch circuit, a control circuit and an independent power supply;

[0020] The control circuit is connected to the detection circuit, the switch circuit and the independent power supply respectively, and is used to control the switch circuit to disconnect in response to the detection signal output by the detection circuit indicating that the input current exceeds the safety value;

[0021] The switch circuit is respectively connected to the detection circuit, the control circuit, the independent power supply and the magnetic suspension controller, and is used to disconnect or connect the input current flowing to the magnetic suspension controller;

[0022] The independent power supply is connected to the control circuit and the switch circuit respectively, and is used to provide working voltage for the switch circuit and the control circuit.

[0023] Optionally, the circuit further includes: an anti-shock circuit;

[0024] The anti-shock circuit is respectively connected between the external power supply and the detection circuit, and between the protection circuit and the magnetic suspension controller;

[0025] Anti-surge circuit is used to handle transient changes in input current.

[0026] Optionally, the anti-shock circuit includes: a resistor and a capacitor connected in series or in parallel;

[0027] Resistors are used to limit the current of the input current;

[0028] Capacitors are used to smooth out circuit fluctuations in input current.

[0029] Optionally, the reset circuit is also used to receive a manual reset signal and reset the protection circuit.

[0030] The technical solution provided by this application has the following beneficial effects:

[0031] This application ensures that the circuit can respond quickly and safely when faced with current anomalies through a comprehensive detection, protection and reset mechanism. The detection circuit is responsible for real-time monitoring of the current state, the protection circuit disconnects the input current to protect the circuit and controller when the current is abnormal, and the reset circuit restores the normal operation of the circuit after the current returns to normal. This protects the magnetic levitation controller from damage due to abnormal current, helps to extend the service life of the magnetic levitation controller, and further improves the operating efficiency and stability of the magnetic levitation motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic diagram of the structure of a current protection circuit of a magnetic suspension controller provided in an embodiment of the present application;

[0033] Figure 2 A schematic diagram of the structure of another current protection circuit of a magnetic suspension controller provided in an embodiment of the present application;

[0034] Figure 3 A schematic diagram of the structure of another current protection circuit of a magnetic suspension controller provided in an embodiment of the present application;

[0035] Figure 4 A schematic diagram of the structure of another current protection circuit of a magnetic suspension controller provided in an embodiment of the present application;

[0036] Figure 5 A schematic diagram of the structure of another magnetic levitation controller current protection circuit provided in an embodiment of the present application. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0038] An embodiment of the present application provides a current protection circuit for a magnetic levitation controller.

[0039] See also Figure 1 As shown, the current protection circuit of the magnetic suspension controller includes: a detection circuit, a protection circuit, a reset circuit and a magnetic suspension controller;

[0040] The input end of the detection circuit is connected to the output end of the external power supply, and the output end of the detection circuit is respectively connected to the input end of the protection circuit and the input end of the reset circuit, wherein the detection circuit is specifically used to detect the input current provided by the external power supply, and output a detection signal generated based on the input current to the protection circuit and the reset circuit; for example, the detection current monitors the size and state of the input current in real time, and generates a corresponding detection signal when the current exceeds a preset safety range or other abnormal state or changes from an abnormal state to a normal state.

[0041] The input end of the protection circuit is respectively connected to the output end of the detection circuit, the output end of the protection circuit is connected to the input end of the magnetic suspension controller, and the control end of the protection circuit is connected to the output end of the reset circuit. The protection circuit is used to receive the detection signal output by the detection circuit, and in response to the detection signal indicating the current abnormality, disconnect the input current flowing to the magnetic suspension controller to ensure that the power supply is quickly disconnected in the event of current abnormalities such as overload and short circuit, thereby protecting the magnetic suspension controller.

[0042] The input end of the reset circuit is connected to the output end of the detection circuit, and the output end of the reset circuit is connected to the control end of the protection circuit. The reset circuit is used to receive the detection signal, and in response to the detection signal indicating that the current has returned to normal, reset the protection circuit to release the disconnection state of the protection circuit to the input current, so that the circuit can be restored to a normal working state, ensuring that the normal operation of the circuit can be restored in time after the current anomaly is released.

[0043] exist Figure 1 In the circuit shown, a comprehensive detection, protection and reset mechanism is used to ensure that the circuit can respond quickly and safely when faced with current anomalies. The detection circuit is responsible for real-time monitoring of the current state, the protection circuit disconnects the input current to protect the circuit and the magnetic suspension controller when the current is abnormal, and the reset circuit restores the normal operation of the circuit after the current returns to normal. This protects the magnetic suspension controller from damage due to current anomalies, helps to extend the service life of the magnetic suspension controller, and further improves the operating efficiency and stability of the magnetic suspension motor. In addition, the protection circuit helps maintain the stable operation of the system, avoids system crashes or data loss caused by faults, and can reduce equipment damage and failures, and reduce the cost of maintenance and replacement of equipment.

[0044] See also Figure 2 As shown, in some implementations of the embodiments of the present application, the detection circuit includes: a current sensor, a processing unit, a comparator, and a reference circuit. The connection relationship and functions of the components in the detection circuit are as follows:

[0045] The input end of the current sensor is connected to the output end of the external power supply, and the output end of the current sensor is connected to the input end of the processing unit; the current sensor is a current detection element, which is used to detect the magnitude and state of the input current of the external power supply. Preferably, the current sensor adopts a Hall effect sensor.

[0046] The input end of the processing unit is connected to the output end of the current sensor, and the output end of the processing unit is connected to the input end of the comparator; the processing unit is responsible for receiving the detection signal output by the current sensor, and performing signal processing, such as amplification, filtering, etc., and outputting the processed signal to the comparator.

[0047] The output end of the reference circuit is connected to the input end of the comparator to provide a reference current for the comparator. The reference current serves as a reference standard for the current and is used to compare with the input current output by the processing unit. It can be understood that the reference current can be set according to the design requirements of the magnetic levitation controller and the characteristics of the current protection circuit.

[0048] The input end of the comparator is respectively connected to the output end of the processing unit and the output end of the reference circuit, and the output end of the comparator is connected to the input end of the protection circuit, for comparing the input current and the reference current, and generating a corresponding detection signal, which is used to indicate whether the current is abnormal, and output the detection signal to the protection circuit and the reset circuit to achieve on-off control of the circuit.

[0049] exist Figure 2 In the circuit shown, the input current is accurately detected by setting a current sensor and a processing unit, and converted into a signal that is convenient for subsequent processing; the reference circuit provides a stable reference current for the comparator, making the comparator more accurate when comparing currents, ensuring that abnormal currents can be discovered in time, so as to respond quickly and prevent damage to the magnetic suspension controller due to abnormal currents. The processing unit optimizes the input current, which can filter out noise signals in the current and avoid misjudgments caused by interference, thereby further improving the reliability of the loop, reducing misjudgments, and improving the reliability of the loop.

[0050] See also Figure 3 As shown, in some implementations of the embodiments of the present application, the processing unit includes: an amplifier and a filter, wherein the connection relationship and functions of the components in the processing unit are as follows:

[0051] The input end of the amplifier is connected to the output end of the current sensor, and the output end of the amplifier is connected to the input end of the filter; or; the input end of the filter is connected to the output end of the current sensor, and the output end of the filter is connected to the input end of the amplifier;

[0052] Among them, the amplifier is a component that can enhance the amplitude of electrical signals. It is used to enhance the input current signal, making the signal easier to be accurately processed by subsequent circuits; and the filter is used to remove interference or clutter in the input current, filter out unnecessary noise in the input signal, and leave the pure signal part to ensure the stability and reliability of the signal.

[0053] exist Figure 3 In the circuit shown, by setting the amplifier in the processing unit, the input current signal can be amplified, making the weak current change more significant, which helps to detect more subtle current anomalies and improve the detection accuracy of the loop. The filter can remove the noise signal in the input current, making the amplified current signal purer, reducing the misjudgment caused by current fluctuations, and significantly improving the stability of the circuit.

[0054] See also Figure 4 As shown, in some implementations of the embodiments of the present application, the protection circuit is an overcurrent protection circuit; specifically, the overcurrent protection circuit is used to respond to the detection signal when the detection signal indicates that the input current exceeds the safety value, and disconnect the input current to protect the magnetic levitation controller.

[0055] In some implementations of the embodiments of the present application, the overcurrent protection circuit includes: a switch circuit, a control circuit, and an independent power supply;

[0056] Among them, the input end of the switching circuit is connected to the output end of the comparator in the detection circuit, which is used to control or disconnect the input current flowing to the controller; the control end of the switching circuit is connected to the output end of the control circuit, which is used to receive a control signal to control the on and off state of the switch; the output end of the switching circuit is connected to the magnetic levitation controller, and the working voltage is provided by an independent power supply.

[0057] The input end of the control circuit is connected to the output end of the detection circuit, the output end of the control circuit is connected to the control end of the protection circuit, and the working voltage is provided by an independent power supply, and is used to receive the detection signal, and when the detection signal indicates that the input current exceeds the safety value, respond to the detection signal and output a control signal to control the switch circuit to disconnect;

[0058] The independent power supply is connected to the control circuit and the switch circuit respectively, and is used for providing a stable working voltage for the control circuit and the switch circuit.

[0059] exist Figure 4In the circuit shown, by real-time monitoring of the detection signal and disconnecting the circuit when the detection signal indicates that the input current exceeds the safety value, the occurrence of safety accidents such as equipment damage or fire caused by excessive current is effectively prevented. The design of the independent power supply ensures that the overcurrent protection circuit can still work normally when the main circuit power fails, improving the reliability of the entire circuit system. The control circuit can be adjusted according to different safety value settings to meet the current protection requirements of different equipment or application scenarios.

[0060] See also Figure 5 As shown, in some implementations of the embodiments of the present application, the current protection circuit of the magnetic suspension controller further includes: an anti-shock circuit;

[0061] The input end of the anti-shock circuit is connected between the output end of the external power supply and the input end of the detection circuit, and the output end of the anti-shock circuit is connected between the output end of the protection circuit and the input end of the magnetic suspension controller; it is used to smooth the transient changes of the input current and withstand the impact of instantaneous large current on the circuit.

[0062] In some implementations of the embodiments of the present application, the anti-shock circuit includes: a resistor and a capacitor;

[0063] In some implementations of the embodiments of the present application, resistors and capacitors may be connected in parallel or in series, wherein the resistor is used to limit the magnitude of the instantaneous current flowing through, and the capacitor is used to smooth current fluctuations. Through the combination of resistors and capacitors, the anti-shock circuit can effectively alleviate current shocks and smooth current output.

[0064] exist Figure 5 In the circuit shown, the resistor in the anti-shock circuit limits the peak value of the transient current, so that the current does not impact the circuit when it changes suddenly, avoiding overload and damage to circuit components. The capacitor can buffer the transient current changes and smooth the fluctuations, thereby maintaining the stability of the input current, reducing the impact of the instantaneous current changes on the magnetic suspension controller, and ensuring the smooth operation of the system.

[0065] In some implementations of the embodiments of the present application, after the protection circuit is actuated, the action information may be further uploaded to the host computer via the communication circuit to monitor the on / off status of the circuit.

[0066] In some implementations of the embodiments of the present application, the reset circuit not only has an automatic reset function, but can also receive a manual reset signal and perform a manual reset operation on the protection circuit. For example, a reset signal is output to the protection circuit via the reset circuit through a host computer.

[0067] It is understandable that the manual reset signal may be a physical signal in the form of a button press, a switch switch, etc., or an electrical signal in the form of a digital signal, an analog signal, etc.

[0068] By adding a manual reset function, users can manually trigger the reset operation when needed, rather than relying solely on the automatic reset mechanism, which improves the flexibility and controllability of the circuit, especially when dealing with complex faults or performing equipment maintenance.

[0069] Finally, it should be noted that, in the embodiments of the present application, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also includes other elements that are not clearly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of more restrictions, the elements limited by the statement "comprise one..." do not exclude the presence of other identical elements in the process, method, article or equipment including the elements.

[0070] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A magnetic suspension controller current protection circuit, characterized in that: The circuit includes: a detection circuit, a protection circuit, a reset circuit and a magnetic suspension controller; The detection circuit is connected to the external power supply, the protection circuit, and the reset circuit respectively, and is used to detect the input current provided by the external power supply and output a detection signal to the protection circuit and the reset circuit; The protection circuit is respectively connected to the detection circuit, the magnetic suspension controller, and the reset circuit, and is used to receive the detection signal output by the detection circuit, and disconnect the input current flowing to the magnetic suspension controller in response to the detection signal indicating that the current is abnormal; The reset circuit is connected to the detection circuit and the protection circuit respectively, and is used to receive the detection signal output by the detection circuit, and reset the protection circuit in response to the detection signal indicating that the current returns to normal.

2. The circuit according to claim 1, characterized in that The detection circuit includes: a current sensor, a processing unit, a comparator and a reference circuit.

3. The circuit according to claim 2, It is characterized by: The current sensor is connected to the external power supply and the processing unit respectively, and is used to perform signal detection on the input current provided by the external power supply; The processing unit is connected to the current sensor and the comparator respectively, and is used to perform signal processing on the input current flowing through the current sensor; The reference circuit is connected to the comparator and is used to provide a reference current for the comparator; The comparator is respectively connected to the processing unit, the protection circuit, the reference circuit and the reset circuit, and is used to compare the input current flowing through the processing unit and the reference current, generate the detection signal, and output it to the protection circuit and the reset circuit.

4. The circuit according to claim 2, characterized in that The processing unit includes: an amplifier and a filter.

5. The circuit according to claim 4, characterized in that ； The amplifier is connected to the current sensor and the filter respectively, or the filter is connected to the current sensor and the amplifier respectively; The amplifier is used to perform signal amplification on the input current; The filter is used to remove noise from the input current.

6. The circuit according to claim 1, characterized in that The protection circuit is an overcurrent protection circuit; The overcurrent protection circuit is used to disconnect the input current in response to the detection signal indicating that the input current exceeds a safe value.

7. The circuit according to claim 6, characterized in that The overcurrent protection circuit includes: a switch circuit, a control circuit and an independent power supply; The control circuit is connected to the detection circuit, the switch circuit and the independent power supply respectively, and is used to control the switch circuit to disconnect in response to the detection signal output by the detection circuit indicating that the input current exceeds the safety value; The switch circuit is connected to the detection circuit, the control circuit, the independent power supply and the magnetic suspension controller respectively, and is used to disconnect or connect the input current flowing to the magnetic suspension controller; The independent power supply is connected to the control circuit and the switch circuit respectively, and is used to provide working voltage for the switch circuit and the control circuit.

8. The circuit according to claim 1, characterized in that The circuit also includes: an anti-shock circuit; The anti-shock circuit is respectively connected between the external power supply and the detection circuit, and between the protection circuit and the magnetic suspension controller; The anti-shock circuit is used to process transient changes of the input current.

9. The circuit according to claim 8, characterized in that The anti-shock circuit comprises: a resistor and a capacitor connected in series or in parallel; The resistor is used to limit the current magnitude of the input current; The capacitor is used to smooth the circuit fluctuation of the input current.

10. The circuit according to claim 1, characterized in that The reset circuit is also used to receive a manual reset signal and reset the protection circuit.

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