Driving power supply and oxygen generation device

Abstract

The utility model provides a driving power supply and an oxygen production device, the driving power supply comprises a rectification module, the input end of the rectification module is coupled with an AC power supply; the input end of the power factor correction module is coupled with the output end of the rectification module; the bus capacitor is coupled with the output end of the power factor correction module; the input end of the variable frequency driving module is coupled with the bus capacitor, and the output end of the variable frequency driving module is coupled with the motor; and the control module is coupled with the variable frequency driving module and the power factor correction module. Through the mode, the rectified voltage is converted into the stable voltage through the power factor correction module, and the power factor of the input alternating current power supply is improved, so that the power grid voltage adaptability and the power factor of the oxygen generation device are improved, current harmonics are reduced, and the stability of the oxygen generation device system is improved.

Description

Technical Field

[0001] This application relates primarily to the field of power supply technology, and in particular to drive power supplies and oxygen generation devices. Background Technology

[0002] With the continuous improvement of people's living standards and the increasing aging of the population, oxygen concentrators have gradually become a common medical and health care device in households. For patients with respiratory diseases such as COPD and cardiovascular diseases, as well as pregnant women who are about to give birth, regular oxygen inhalation can improve blood oxygen saturation, enhance the body's immunity, and achieve an auxiliary therapeutic effect.

[0003] Most current medical oxygen generators use AC asynchronous motors with fixed-frequency operation. Fixed-frequency oxygen generators are limited by the voltage and frequency of the mains power supply, causing the compressor to operate at a constant frequency and maximum power point, resulting in high energy consumption (greater than 300W), high noise (greater than 40dB), and short lifespan (less than 10,000 hours). Only a few medical oxygen generators on the market use variable-frequency drives. Their solutions typically involve using large-capacity electrolytic capacitors to smooth and filter the rectified voltage before variable-frequency drive conversion. However, this solution requires very large electrolytic capacitors to obtain a stable DC voltage, and the DC voltage value will change with the rise or fall of the mains voltage, causing fluctuations when the compressor is controlled at a constant speed. Simultaneously, large electrolytic capacitor filtering leads to a low power factor and high current distortion rate on the mains side, causing interference to the mains and other electrical equipment. Furthermore, limited by the rated drive voltage range of the variable-frequency compressor, the input mains voltage of the variable-frequency drive is usually limited to ±10% of the rated voltage, making it unsuitable for different mains voltage levels in different countries and regions. Utility Model Content

[0004] The main purpose of this application is to provide a drive power supply and an oxygen generator to solve the problem that the variable frequency power supply in the oxygen generator is limited by the voltage and frequency of the power grid and cannot be widely used, so as to improve the power grid voltage adaptability and power factor of the oxygen generator, reduce harmonic current and improve the stability of the system.

[0005] To address the aforementioned issues, this application provides a drive power supply and an oxygen generator. The drive power supply includes: a rectifier module, the input of which is coupled to an AC power source; a power factor correction module, the input of which is coupled to the output of the rectifier module; a bus capacitor, the bus capacitor being coupled to the output of the power factor correction module; a frequency converter drive module, the input of which is coupled to the bus capacitor, and the output of which is coupled to a motor; and a control module, coupled to the frequency converter drive module and the power factor correction module.

[0006] In one embodiment, the drive power supply further includes an auxiliary power supply module, the input terminal of which is coupled to a bus capacitor, and the auxiliary power supply module is configured to supply power to the control module.

[0007] In one embodiment, the auxiliary power supply module includes: a transformer, a first terminal of the primary side of the transformer being coupled to a first terminal of a bus capacitor; a first transistor, a first terminal of the first transistor being coupled to a second terminal of the primary side, and a control terminal of the first transistor being coupled to a control module; a first resistor, a first terminal of the first resistor being coupled to a second terminal of the first transistor, and a second terminal of the first resistor being coupled to a second terminal of the bus capacitor; a second transistor, a first terminal of the second transistor being coupled to a first terminal of the secondary side of the transformer, and a control terminal of the second transistor being coupled to the control module; and a first capacitor, a first terminal of the first capacitor being coupled to a second terminal of the second transistor, and a second terminal of the first capacitor being coupled to a second terminal of the secondary side; wherein the first and second terminals of the first capacitor are configured to supply power to the control module.

[0008] In one embodiment, the driving power supply further includes a filtering module, the input terminal of which is coupled to an AC power supply, and the output terminal of which is coupled to an input terminal of a rectifier module; or, the driving power supply further includes a protection module, the input terminal of which is coupled to an AC power supply, and the output terminal of which is coupled to an input terminal of a rectifier module; or, the driving power supply further includes: a filtering module, the input terminal of which is coupled to an AC power supply, and a protection module, the input terminal of which is coupled to an output terminal of the filtering module, and the output terminal of which is coupled to an input terminal of a rectifier module.

[0009] In one embodiment, the drive power supply further includes a filtering module, which includes: a second capacitor, a first terminal of which is coupled to a first terminal of the AC power supply, and a second terminal of which is grounded; a third capacitor, a first terminal of which is coupled to a second terminal of the second capacitor, and a second terminal of which is coupled to a second terminal of the AC power supply; a fourth capacitor, a first terminal of which is coupled to a first terminal of the second capacitor, and a second terminal of which is coupled to a second terminal of the third capacitor; a first common-mode inductor, a first terminal of which is coupled to a first terminal of the fourth capacitor, and a second terminal of which is coupled to a second terminal of the fourth capacitor; a fifth capacitor, a first terminal of which is coupled to a third terminal of the first common-mode inductor, and a second terminal of which is coupled to a fourth terminal of the first common-mode inductor; a second common-mode inductor, a first terminal of which is coupled to a first terminal of the fifth capacitor, and a second terminal of which is coupled to a second terminal of the fifth capacitor; and a sixth capacitor, a first terminal of which is coupled to a third terminal of the second common-mode inductor, and a second terminal of which is coupled to a fourth terminal of the second common-mode inductor; wherein the first and second terminals of the sixth capacitor are coupled to a rectifier module.

[0010] In one embodiment, the drive power supply further includes a protection module, which includes: a surge protection component, the input terminal of which is coupled to an AC power supply; and an overvoltage protection component, the input terminal of which is coupled to the output terminal of the surge protection component, and the output terminal of which is coupled to a rectifier module.

[0011] In one embodiment, the surge protection component includes: a varistor, a first end of which is coupled to a first end of an AC power supply and an overvoltage protection component, and a second end of which is coupled to the first end of the AC power supply and a rectifier module.

[0012] In one embodiment, the overvoltage protection component includes: a first switching unit, a first terminal of which is coupled to the output terminal of the surge protection component; a thermistor, a first terminal of which is coupled to the second terminal of the first switching unit, and the second terminal of which is coupled to the rectifier module; and a second switching unit, a first terminal of which is coupled to the output terminal of the surge protection component, and the second terminal of which is coupled to the second terminal of the thermistor.

[0013] In one embodiment, the rectifier module includes: a first diode, the anode of which is coupled to an AC power supply; a second diode, the cathode of which is coupled to the anode of the first diode; a third diode, the cathode of which is coupled to the cathode of the first diode, and the anode of which is coupled to the AC power supply; a fourth diode, the cathode of which is coupled to the anode of the third diode, and the anode of which is coupled to the anode of the second diode; and a seventh capacitor, the first terminal of which is coupled to the cathode of the third diode, and the second terminal of which is coupled to the anode of the fourth diode; wherein the first and second terminals of the seventh capacitor are coupled to a power factor correction module.

[0014] In one embodiment, the power factor correction module includes: an inductor, a first end of which is coupled to a first output terminal of the rectifier module; a third transistor, a first end of which is coupled to a second end of the inductor, a second end of which is coupled to a second terminal of a bus capacitor, and a control terminal of the third transistor coupled to a control module; a second resistor, a first end of which is coupled to a second output terminal of the rectifier module, and a second end of which is coupled to a second terminal of the third transistor; and a fourth transistor, a first end of which is coupled to a first end of the third transistor, a second end of which is coupled to a first terminal of the bus capacitor, and a control terminal of the fourth transistor coupled to the control module.

[0015] In one embodiment, the frequency converter drive module includes: a fifth transistor, the first terminal of which is coupled to the first terminal of a bus capacitor, the second terminal of which is coupled to the first phase of the oxygen generator motor, and the control terminal of which is coupled to a control module; a sixth transistor, the first terminal of which is coupled to the second terminal of the fifth transistor, the second terminal of which is coupled to the second terminal of the bus capacitor, and the control terminal of which is coupled to the control module; a seventh transistor, the first terminal of which is coupled to the first terminal of the bus capacitor, the second terminal of which is coupled to the second phase of the oxygen generator motor, and the control terminal of which is coupled to the control module; an eighth transistor, the first terminal of which is coupled to the second terminal of the seventh transistor, the second terminal of which is coupled to the second terminal of the bus capacitor, and the control terminal of which is coupled to the control module; a ninth transistor, the first terminal of which is coupled to the first terminal of the bus capacitor, the second terminal of which is coupled to the third phase of the oxygen generator motor, and the control terminal of which is coupled to the control module; and a tenth transistor, the first terminal of which is coupled to the second terminal of the ninth transistor, the second terminal of which is coupled to the second terminal of the bus capacitor, and the control terminal of which is coupled to the control module.

[0016] To address the aforementioned issues, this application also provides an oxygen generating device, which includes a driving power supply as described in any of the embodiments above.

[0017] The driving power supply and oxygen generator provided in this application improve the grid voltage adaptability and power factor of the oxygen generator by adding a power factor correction module between the rectifier module and the bus capacitor of the driving power supply. The power factor correction module converts the rectified voltage into a stable voltage and improves the power factor of the input AC power supply, thereby reducing current harmonics and improving the stability of the oxygen generator system. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0019] Figure 1 This is a schematic diagram of the structure of the first embodiment of the driving power supply provided in this application;

[0020] Figure 2 This is a schematic diagram of the structure of the second embodiment of the driving power supply provided in this application;

[0021] Figure 3 This is a schematic diagram of the structure of an embodiment of the auxiliary power supply module provided in this application;

[0022] Figure 4 This is a schematic diagram of the structure of the third embodiment of the driving power supply provided in this application;

[0023] Figure 5 This is a schematic diagram of the structure of the fourth embodiment of the driving power supply provided in this application;

[0024] Figure 6 This is a schematic diagram of the structure of the fifth embodiment of the driving power supply provided in this application;

[0025] Figure 7 This is a schematic diagram of the structure of an embodiment of the filtering module provided in this application;

[0026] Figure 8 This is a schematic diagram of the structure of the first embodiment of the protection module provided in this application;

[0027] Figure 9 This is a schematic diagram of the structure of the second embodiment of the protection module provided in this application;

[0028] Figure 10 This is a schematic diagram of the structure of an embodiment of the rectifier module provided in this application;

[0029] Figure 11 This is a schematic diagram of the structure of an embodiment of the power factor correction module provided in this application;

[0030] Figure 12 This is a schematic diagram of the structure of an embodiment of the frequency converter drive module provided in this application;

[0031] Figure 13 This is a schematic diagram of an embodiment of the oxygen generating device provided in this application.

[0032] Icon labels:

[0033] 10. Rectifier module; 11. Filter module; 12. Protection module; 121. Surge protection component; 122. Overvoltage protection component; 123. First switching unit; 124. Second switching unit; 20. Power factor correction module; 30. Bus capacitor; 40. Variable frequency drive module; 50. Control module; 60. Auxiliary power supply module; 61. Transformer; 100. Drive power supply; 200. Oxygen generator. Detailed Implementation

[0034] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. It is understood that the specific embodiments described herein are only for explaining this application and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this application are shown in the accompanying drawings, not all structures. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0035] The terms "first," "second," etc., used in this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0036] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0037] See Figure 1 As shown, Figure 1 This is a schematic diagram of the structure of the first embodiment of the drive power supply provided in this application; wherein, the drive power supply 100 includes: a rectifier module 10, a power factor correction module 20, a bus capacitor 30, a frequency converter drive module 40, and a control module 50; specifically, the input terminal of the rectifier module 10 is coupled to an AC power supply; the input terminal of the power factor correction module 20 is coupled to the output terminal of the rectifier module 10; the bus capacitor 30 is coupled to the output terminal of the power factor correction module 20; the input terminal of the frequency converter drive module 40 is coupled to the bus capacitor 30, and the output terminal of the frequency converter drive module 40 is coupled to a motor; the control module 50 is coupled to the frequency converter drive module 40 and the power factor correction module 20.

[0038] By adding a power factor correction module 20 between the rectifier module 10 and the bus capacitor 30 of the drive power supply 100, the rectified voltage is converted into a stable voltage and the power factor of the input AC power supply is improved, thereby enhancing the grid voltage adaptability and power factor of the oxygen generator, reducing current harmonics and improving the stability of the oxygen generator system.

[0039] In one embodiment, the control module 50 includes an MCU circuit, sampling circuits for voltage, current, and temperature, a power factor correction control circuit, a motor drive control circuit, and an external communication circuit. The power supply uses an MCU as the core control chip, integrating power factor correction, motor drive, and external communication, thus simplifying system control. An MCU (Microcontroller Unit) is a microcomputer system that integrates a microprocessor core, memory, and input / output interfaces.

[0040] In one embodiment, such as Figure 2 As shown, Figure 2 This is a schematic diagram of the structure of the second embodiment of the driving power supply provided in this application; the driving power supply 100 also includes: an auxiliary power supply module 60, the input terminal of the auxiliary power supply module 60 is coupled to the bus capacitor 30, the auxiliary power supply module 60 is configured to supply power to the control module 50, and the auxiliary power supply module 60 is also configured to provide power to the oxygen generator.

[0041] Based on the existing structure, by setting up an auxiliary power supply module 60, the oxygen generator can be supplied with control power while simultaneously absorbing the back electromotive force generated when the compressor stops, thus eliminating the hazards caused by back EMF. Back EMF refers to the electromotive force generated in an electric motor or other rotating equipment due to the rotor's rotation cutting the magnetic field. This EMF is in the opposite direction to the EMF of the motor's input power supply, hence the name. The magnitude of the back EMF is directly proportional to the motor's speed. The presence of back EMF reduces the effective value of the motor's input power supply EMF, thereby affecting the motor's output power and efficiency.

[0042] In one embodiment, such as Figure 3 As shown, Figure 3 This is a schematic diagram of an embodiment of the auxiliary power supply module provided in this application; wherein, the auxiliary power supply module 60 includes: a transformer 61, a first transistor Q1, a first resistor, a second transistor Q2, and a first capacitor C1; specifically, the first end of the primary side of the transformer 61 is coupled to the first end of the bus capacitor 30; the first end of the first transistor Q1 is coupled to the second end of the primary side, and the control end of the first transistor Q1 is coupled to the control module 50; the first end of the first resistor is coupled to the second end of the first transistor Q1, and the second end of the first resistor is coupled to the second end of the bus capacitor 30; the first end of the second transistor Q2 is coupled to the first end of the secondary side of the transformer 61, and the control end of the second transistor Q2 is coupled to the control module 50; the first end of the first capacitor C1 is coupled to the second end of the second transistor Q2, and the second end of the first capacitor C1 is coupled to the second end of the secondary side; wherein, the first and second ends of the first capacitor C1 are configured to provide overall power supply to the control module 50 and the oxygen generator.

[0043] In one embodiment, the auxiliary power supply module 60 employs an isolated flyback converter circuit to provide control power for the integrated drive power supply 100 and control power for the entire variable frequency oxygen generator. The output of the control power supply for the entire variable frequency oxygen generator meets the 2MOPP isolation withstand voltage requirements of medical devices when connected to the high-voltage side of the mains power supply. The auxiliary power supply module draws power from the electrolytic capacitor bus capacitor 30 output from the power factor correction module 20, i.e., the variable frequency drive bus. When applied to a scroll compressor, if the compressor outlet pressure is high when the compressor stops, the scroll compressor's moving disc will reverse under pressure, generating a reverse electromotive force (EMF). This reverse EMF is rectified and charged through the body diode of the IGBT or IPM, causing the capacitor voltage to rise and even exceed the device's withstand voltage, posing a risk of damage. Generally, very large-capacity electrolytic capacitors or discharge resistors are needed on the bus to eliminate the back EMF voltage. Drawing power from this electrolytic capacitor provides an energy absorption path for the back EMF through the auxiliary power supply module, thus eliminating the hazards caused by the back EMF.

[0044] In one embodiment, such as Figure 4 , Figure 5 and Figure 6 As shown, Figure 4 This is a schematic diagram of the structure of the third embodiment of the driving power supply provided in this application; Figure 5 This is a schematic diagram of the structure of the fourth embodiment of the driving power supply provided in this application; Figure 6 This is a schematic diagram of the structure of the fifth embodiment of the driving power supply provided in this application; wherein, as shown... Figure 4 As shown, the drive power supply also includes a filter module. The input terminal of the filter module is coupled to the AC power supply, and the output terminal of the filter module is coupled to the input terminal of the rectifier module.

[0045] Or, such as Figure 5 As shown, the drive power supply also includes a protection module. The input terminal of the protection module is coupled to the AC power supply, and the output terminal of the protection module is coupled to the input terminal of the rectifier module; or, as... Figure 6 As shown, the drive power supply also includes a filter module, the input of which is coupled to an AC power supply.

[0046] The protection module has its input terminal coupled to the output terminal of the filter module, and its output terminal coupled to the input terminal of the rectifier module.

[0047] In the above embodiment, the input terminal of the rectifier module 10 is connected to a single-phase AC power supply, which can adapt to a wide range of operating voltages. For example, the normal operating voltage range of the AC power supply can adapt to the global grid voltage of 85-264Vac and the frequency range of 47-63Hz. When the input voltage reaches the range of 265-500Vac, the power supply can provide auxiliary power normally without damage and report overvoltage fault information.

[0048] In one embodiment, such as Figure 7 As shown, Figure 7 This is a schematic diagram of an embodiment of the filtering module provided in this application; the filtering module 11 includes: a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a first common-mode inductor LCM1, a fifth capacitor C5, a second common-mode inductor LCM2, and a sixth capacitor C6; specifically, the first terminal of the second capacitor C2 is coupled to the first terminal of the AC power supply, and the second terminal of the second capacitor C2 is grounded; the first terminal of the third capacitor C3 is coupled to the second terminal of the second capacitor C2, and the second terminal of the third capacitor C3 is coupled to the second terminal of the AC power supply; the first terminal of the fourth capacitor C4 is coupled to the first terminal of the second capacitor C2, and the second terminal of the fourth capacitor C4 is coupled to the second terminal of the third capacitor C3; the first common-mode inductor... The first terminal of LCM1 is coupled to the first terminal of the fourth capacitor C4, and the second terminal of the common-mode inductor L1 is coupled to the second terminal of the fourth capacitor C4; the first terminal of the fifth capacitor C5 is coupled to the third terminal of the first common-mode inductor LCM1, and the second terminal of the fifth capacitor C5 is coupled to the fourth terminal of the first common-mode inductor LCM1; the first terminal of the second common-mode inductor LCM2 is coupled to the first terminal of the fifth capacitor C5, and the second terminal of the second common-mode inductor LCM2 is coupled to the second terminal of the fifth capacitor C5; the first terminal of the sixth capacitor C6 is coupled to the third terminal of the second common-mode inductor LCM2, and the second terminal of the sixth capacitor C6 is coupled to the fourth terminal of the second common-mode inductor LCM2; wherein, corresponding to the above embodiment, combined with Figure 4 and Figure 7 As shown, the first and second terminals of the sixth capacitor C6 are coupled to the rectifier module 10; or, in combination with... Figure 6 and Figure 7 As shown, the first and second ends of the sixth capacitor C6 are coupled to the protection module 12.

[0049] Specifically, the filtering module 11 is a two-stage common-mode filtering module 11, consisting of a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a first common-mode inductor LCM1, a fifth capacitor C5, a second common-mode inductor LCM2, and a sixth capacitor C6, to meet the requirements of the EN55032CLASS B EMC standard for medical devices.

[0050] In one embodiment, such as Figure 8 As shown, Figure 8This is a schematic diagram of the structure of the first embodiment of the protection module provided in this application; the protection module 12 includes: a surge protection component 121 and an overvoltage protection component 122; the input terminal of the surge protection component 121 is coupled to an AC power supply; the input terminal of the overvoltage protection component 122 is coupled to the output terminal of the surge protection component 121, and the output terminal of the overvoltage protection component 122 is coupled to a rectifier module 10. It can be understood that the protection module 12 consists of two parts: surge protection and overvoltage protection, to protect the circuit from impact when a lightning surge voltage occurs, suppress start-up inrush current, and cut off the AC power supply when the input voltage is too high, thereby realizing the function of the protection circuit.

[0051] Specifically, the specific structures of surge protection component 121 and overvoltage protection component 122 are described in detail below:

[0052] In one embodiment, such as Figure 9 As shown, Figure 9 This is a schematic diagram of the structure of the second embodiment of the protection module provided in this application; wherein, the surge protection component 121 includes: a varistor TVS1, the first end of the varistor TVS1 is coupled to the first end of the AC power supply and the overvoltage protection component 122, and the second end of the varistor TVS1 is coupled to the first end of the AC power supply and the rectifier module 10.

[0053] In one embodiment, such as Figure 9 As shown, the overvoltage protection component 122 includes: a first switching unit 123, a thermistor RT1, and a second switching unit 124; wherein, the first terminal of the first switch is coupled to the output terminal of the surge protection component 121 (more specifically, in one embodiment, as shown in the figure). Figure 9 The first terminal of the first switch is coupled to the first terminal of the varistor TVS1; the first terminal of the thermistor RT1 is coupled to the second terminal of the first switch unit 123, and the second terminal of the thermistor RT1 is coupled to the rectifier module 10; the first terminal of the second switch unit 124 is coupled to the output terminal of the surge protection component 121 (more specifically, in one embodiment, such as...). Figure 9 The second terminal of the second switching unit 124 is coupled to the first terminal of the varistor TVS1; the second terminal of the second switching unit 124 is coupled to the second terminal of the thermistor RT1.

[0054] In this configuration, the first switching unit 123 and the thermistor RT1 are connected in series, and the second switching unit 124 is connected in parallel. In one embodiment, the first switching unit 123 is a soft-start relay, the thermistor RT1 is a positive temperature coefficient resistor, and the second switching unit 124 is a power relay. When the AC power supply voltage exceeds the normal operating voltage, the voltage of the bus capacitor 30 rises to the overvoltage protection point, the first switching unit 123 and the second switching unit 124 disconnect, the AC input is disconnected from the power supply, and the bus capacitor 30 drops. When the voltage of the bus capacitor 30 drops to the recovery point, the first switching unit 123 closes, the capacitor voltage continues to rise to the protection point, and then the first switching unit 123 closes. This process is repeated to keep the first switching unit 123 in hiccup mode, ensuring that the power supply is not damaged when the AC input voltage is too high, and that it can normally supply power to the auxiliary power supply module 60.

[0055] In one embodiment, such as Figure 10 As shown, Figure 10 This is a schematic diagram of an embodiment of the rectifier module provided in this application; wherein, the rectifier module 10 includes: a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, and a seventh capacitor C7; wherein, the anode of the first diode D1 is coupled to an AC power supply (in another embodiment, such as...). Figure 9 The anode of the first diode D1 is coupled to the second terminal of the thermistor RT1; the cathode of the second diode D2 is coupled to the anode of the first diode D1; the cathode of the third diode D3 is coupled to the cathode of the first diode D1, and the anode of the third diode D3 is coupled to an AC power supply (in another embodiment, such as...). Figure 9 The anode of the third diode D3 is coupled to the second terminal of the varistor TVS1; the cathode of the fourth diode D4 is coupled to the anode of the third diode D3; the anode of the fourth diode D4 is coupled to the anode of the second diode D2; the first terminal of the seventh capacitor C7 is coupled to the cathode of the third diode D3, and the second terminal of the seventh capacitor C7 is coupled to the anode of the fourth diode D4; wherein, the first and second terminals of the seventh capacitor C7 are coupled to the power factor correction module 20.

[0056] In another embodiment, the rectifier module 10 includes a rectifier bridge and a metal film capacitor, which rectifies the alternating current (AC) voltage into a pulsating direct current (DC) voltage. The rectifier bridge is an electronic component that converts alternating current (AC) into direct current (DC). The metal film capacitor is a type of capacitor characterized by self-healing properties and high stability.

[0057] In one embodiment, such as Figure 11 As shown, Figure 11This is a schematic diagram of an embodiment of the power factor correction module provided in this application; the power factor correction module 20 includes: an inductor L1, a third transistor Q3, a second resistor, and a fourth transistor Q4; the first end of the inductor L1 is coupled to the first output terminal of the rectifier module 10; the first end of the third transistor Q3 is coupled to the second end of the inductor L1, the second end of the third transistor Q3 is coupled to the second end of the bus capacitor 30, and the control terminal of the third transistor Q3 is coupled to the control module 50; the first end of the second resistor is coupled to the second output terminal of the rectifier module 10, and the second end of the second resistor is coupled to the second end of the third transistor Q3; the first end of the fourth transistor Q4 is coupled to the first end of the third transistor Q3, the second end of the fourth transistor Q4 is coupled to the first end of the bus capacitor 30, and the control terminal of the fourth transistor Q4 is coupled to the control module 50.

[0058] The power factor correction module 20 described above transforms the rectified pulsating DC voltage into a stable DC voltage, while simultaneously improving the power factor of the input AC power supply. The DC voltage setting is typically designed based on the rated drive voltage and maximum withstand voltage of the inverter compressor motor, and is generally a constant value. When using the global grid voltage, the DC voltage setting can automatically adjust to follow changes in the grid voltage. Upon detecting a low voltage input, the DC voltage setting is automatically reduced to decrease the voltage boost ratio, thereby eliminating the need for a large inductor L1, improving circuit efficiency, and reducing costs.

[0059] In one embodiment, such as Figure 12 As shown, Figure 12This is a schematic diagram of an embodiment of the frequency converter drive module provided in this application; the frequency converter drive module 40 includes: a fifth transistor Q5, a sixth transistor Q6, a seventh transistor Q7, an eighth transistor Q8, a ninth transistor Q9, and a tenth transistor Q10. The first terminal of the fifth transistor Q5 is coupled to the first terminal of the bus capacitor 30, the second terminal of the fifth transistor Q5 is coupled to the first phase of the motor of the oxygen generator, and the control terminal of the fifth transistor Q5 is coupled to the control module 50; the first terminal of the sixth transistor Q6 is coupled to the second terminal of the fifth transistor Q5, the second terminal of the sixth transistor Q6 is coupled to the second terminal of the bus capacitor 30, and the control terminal of the sixth transistor Q6 is coupled to the control module 50; the first terminal of the seventh transistor Q7 is coupled to the first terminal of the bus capacitor 30, and the seventh transistor... The second terminal of transistor Q7 is coupled to the second phase of the motor of the oxygen generator, and the control terminal of the seventh transistor Q7 is coupled to the control module 50; the first terminal of the eighth transistor Q8 is coupled to the second terminal of the seventh transistor Q7, the second terminal of the eighth transistor Q8 is coupled to the second terminal of the bus capacitor 30, and the control terminal of the eighth transistor Q8 is coupled to the control module 50; the first terminal of the ninth transistor Q9 is coupled to the first terminal of the bus capacitor 30, the second terminal of the ninth transistor Q9 is coupled to the third phase of the motor of the oxygen generator, and the control terminal of the ninth transistor Q9 is coupled to the control module 50; the first terminal of the tenth transistor Q10 is coupled to the second terminal of the ninth transistor Q9, the second terminal of the tenth transistor Q10 is coupled to the second terminal of the bus capacitor 30, and the control terminal of the tenth transistor Q10 is coupled to the control module 50.

[0060] Understandably, the transistors used can be discrete IGBTs or integrated power modules (IPMs) as power devices. Voltage and current sampling circuits collect the motor bus voltage and three-phase current, analyzing the data to determine the compressor's current speed. Software control algorithms then ensure the compressor operates stably at the set speed. The IGBT (Insulated Gate Bipolar Transistor) is a high-performance power semiconductor device that combines the high input impedance of a MOSFET with the low on-state voltage drop of a bipolar junction transistor (BJT). An IPM (Intelligent Power Module) is a module that integrates power devices such as IGBTs and MOSFETs, as well as drive and protection circuits.

[0061] To address the aforementioned problems, this application also provides an oxygen generating device 200, such as... Figure 13 As shown, Figure 13 This is a schematic diagram of an embodiment of the oxygen generating device provided in this application; the oxygen generating device 200 includes a driving power supply 100 as described in any of the above embodiments.

[0062] The drive power supply 100 provided in this application includes: a rectifier module 10, a power factor correction module 20, a bus capacitor 30, a frequency converter drive module 40, and a control module 50. Specifically, the input terminal of the rectifier module 10 is coupled to an AC power supply; the input terminal of the power factor correction module 20 is coupled to the output terminal of the rectifier module 10; the bus capacitor 30 is coupled to the output terminal of the power factor correction module 20; the input terminal of the frequency converter drive module 40 is coupled to the bus capacitor 30, and the output terminal of the frequency converter drive module 40 is coupled to a motor; the control module 50 is coupled to the frequency converter drive module 40 and the power factor correction module 20.

[0063] Through the above method, the power factor correction module 20 converts the rectified voltage into a stable voltage and improves the power factor of the input AC power supply, thereby enhancing the grid voltage adaptability and power factor of the oxygen generator 200. This allows it to meet global grid voltage and high power factor requirements, adaptively adjust the DC bus voltage, and, combined with the auxiliary power supply module 60, provides input high voltage protection, ensuring uninterrupted auxiliary power supply to the entire unit through a hiccup mechanism, and enabling normal fault alarms. It features a high-isolation, withstand-voltage auxiliary power output, providing control power to the entire oxygen generator 200 while absorbing the back electromotive force generated during compressor shutdown, eliminating the need for additional circuitry.

[0064] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A driving power source characterized by comprising: A drive power supply for controlling a motor, the drive power supply comprising: a rectification module, an input of the rectification module coupled to an AC power supply; a power factor correction module, an input of the power factor correction module coupled to an output of the rectification module; a bus capacitor, an output of the power factor correction module coupled to the bus capacitor; a variable frequency drive module, an input of the variable frequency drive module coupled to the bus capacitor, an output of the variable frequency drive module coupled to a motor; a control module, the control module coupled to the variable frequency drive module and the power factor correction module.

2. The driving power supply according to claim 1, characterized by The drive power supply further comprising: an auxiliary power supply module, an input of the auxiliary power supply module coupled to the bus capacitor, the auxiliary power supply module configured to power the control module.

3. The driving power supply according to claim 2, characterized by The auxiliary power supply module comprising: a transformer, a first end of a primary side of the transformer coupled to a first end of the bus capacitor; a first transistor, a first end of the first transistor coupled to a second end of the primary side, a control end of the first transistor coupled to the control module; a first resistor, a first end of the first resistor coupled to a second end of the first transistor, a second end of the first resistor coupled to a second end of the bus capacitor; a second transistor, a first end of the second transistor coupled to a first end of a secondary side of the transformer, a control end of the second transistor coupled to the control module; a first capacitor, a first end of the first capacitor coupled to a second end of the second transistor, a second end of the first capacitor coupled to a second end of the secondary side; wherein the first end and the second end of the first capacitor are configured to power the control module.

4. The driving power supply according to claim 1, wherein The drive power supply further comprising a filter module, an input of the filter module coupled to an AC power supply, an output of the filter module coupled to an input of the rectification module; or, The drive power supply further comprising a protection module, an input of the protection module coupled to an AC power supply, an output of the protection module coupled to an input of the rectification module; or, The drive power supply further comprising a filter module and a protection module, an input of the filter module coupled to an AC power supply, an input of the protection module coupled to an output of the filter module, an output of the protection module coupled to an input of the rectification module.

5. The driving power supply according to claim 1, wherein The drive power supply further comprising a filter module, the filter module comprising: a second capacitor, a first end of the second capacitor coupled to a first end of the AC power supply, a second end of the second capacitor coupled to ground; a third capacitor, a first end of the third capacitor coupled to a second end of the second capacitor, a second end of the third capacitor coupled to a second end of the AC power supply; a fourth capacitor, a first end of the fourth capacitor coupled to a first end of the second capacitor, a second end of the fourth capacitor coupled to a second end of the third capacitor; a first common mode inductor, a first end of the first common mode inductor coupled to a first end of the fourth capacitor, a second end of the common mode inductor coupled to a second end of the fourth capacitor; a fifth capacitor, a first end of the fifth capacitor coupled to a third end of the first common mode inductor, a second end of the fifth capacitor coupled to a fourth end of the first common mode inductor; A second common-mode inductor, a first end of the second common-mode inductor is coupled to a first end of the fifth capacitor, a second end of the second common-mode inductor is coupled to a second end of the fifth capacitor; A sixth capacitor, a first end of the sixth capacitor is coupled to a third end of the second common-mode inductor, a second end of the sixth capacitor is coupled to a fourth end of the second common-mode inductor; Wherein, the first end and the second end of the sixth capacitor are coupled to the rectifier module.

6. The driving power supply according to claim 1, wherein The drive power supply further comprises a protection module, the protection module comprises: A surge protection component, an input end of the surge protection component is coupled to the AC power supply; An overvoltage protection component, an input end of the overvoltage protection component is coupled to an output end of the surge protection component, an output end of the overvoltage protection component is coupled to the rectifier module.

7. The driving power supply according to claim 6, wherein The surge protection component comprises: A voltage-dependent resistor, a first end of the voltage-dependent resistor is coupled to the first end of the AC power supply and the overvoltage protection component, a second end of the voltage-dependent resistor is coupled to the first end of the AC power supply and the rectifier module.

8. The driving power supply according to claim 6, wherein The overvoltage protection component comprises: A first switch unit, a first end of the first switch is coupled to an output end of the surge protection component; A thermistor, a first end of the thermistor is coupled to a second end of the first switch unit, a second end of the thermistor is coupled to the rectifier module; A second switch unit, a first end of the second switch unit is coupled to the output end of the surge protection component, a second end of the second switch unit is coupled to the second end of the thermistor.

9. The driving power supply according to any one of claims 1 to 8, characterized by The rectifier module comprises: A first diode, an anode of the first diode is coupled to the AC power supply; A second diode, a cathode of the second diode is coupled to an anode of the first diode; A third diode, a cathode of the third diode is coupled to a cathode of the first diode, an anode of the third diode is coupled to the AC power supply; A fourth diode, a cathode of the fourth diode is coupled to an anode of the third diode, an anode of the fourth diode is coupled to an anode of the second diode; A seventh capacitor, a first end of the seventh capacitor is coupled to a cathode of the third diode, a second end of the seventh capacitor is coupled to an anode of the fourth diode; Wherein, the first end and the second end of the seventh capacitor are coupled to the power factor correction module.

10. The driving power supply according to any one of claims 1 to 8, characterized by The power factor correction module comprises: An inductor, a first end of the inductor is coupled to a first output end of the rectifier module; A third transistor, a first end of the third transistor is coupled to a second end of the inductor, a second end of the third transistor is coupled to a second end of the bus capacitor, a control end of the third transistor is coupled to the control module; A second resistor, a first end of the second resistor is coupled to a second output end of the rectifier module, a second end of the second resistor is coupled to a second end of the third transistor; A fourth transistor, a first end of the fourth transistor is coupled to a first end of the third transistor, a second end of the fourth transistor is coupled to a first end of the bus capacitor, a control end of the fourth transistor is coupled to the control module.

11. The driving power supply according to any one of claims 1 to 8, characterized by The variable frequency drive module comprises: A fifth transistor, a first end of the fifth transistor is coupled with the first end of the bus capacitor, a second end of the fifth transistor is coupled with the first phase of the motor, and a control end of the fifth transistor is coupled with the control module; A sixth transistor, a first end of the sixth transistor is coupled with the second end of the fifth transistor, a second end of the sixth transistor is coupled with the second end of the bus capacitor, and a control end of the sixth transistor is coupled with the control module; A seventh transistor, a first end of the seventh transistor is coupled with the first end of the bus capacitor, a second end of the seventh transistor is coupled with the second phase of the motor, and a control end of the seventh transistor is coupled with the control module; An eighth transistor, a first end of the eighth transistor is coupled with the second end of the seventh transistor, a second end of the eighth transistor is coupled with the second end of the bus capacitor, and a control end of the eighth transistor is coupled with the control module; A ninth transistor, a first end of the ninth transistor is coupled with the first end of the bus capacitor, a second end of the ninth transistor is coupled with the third phase of the motor, and a control end of the ninth transistor is coupled with the control module; A tenth transistor, a first end of the tenth transistor is coupled with the second end of the ninth transistor, a second end of the tenth transistor is coupled with the second end of the bus capacitor, and a control end of the tenth transistor is coupled with the control module.

12. An oxygen generating apparatus, characterized by comprising: The oxygen production device comprises the driving power supply according to any one of claims 1-11.

Images