Compressor power supply circuit, compressor and vehicle

Abstract

The utility model discloses a compressor power supply circuit, a compressor and a vehicle, the compressor power supply circuit comprises an LLC switching power supply, the input end of the LLC switching power supply is suitable for being connected with a low-voltage power supply, and the output end of the LLC switching power supply is suitable for being connected with a driver and a controller of the compressor; the LLC switching power supply is configured to generate a first power supply and a second power supply according to the low-voltage power supply, provide the first power supply for the driver so that the driver can drive the compressor motor and provide the second power supply for the controller, and the driver and the controller are arranged in a high-voltage area; the communication unit is arranged in the low-voltage area and is suitable for receiving a sleep instruction; and the isolation communication unit is configured to transmit the dormancy instruction to the controller in an isolated manner, so that the controller generates a dormancy control signal according to the dormancy instruction, and transmits the dormancy control signal to the communication unit in an isolated manner, so that the communication unit enters a dormancy state according to the dormancy control signal, and controls the LLC switching power supply to enter the dormancy state.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of compressors, in particular to a compressor power supply circuit, a compressor and a vehicle. BACKGROUND

[0002] The compressor is a core component of the air conditioning system of the vehicle, and is used for adjusting the temperature inside the vehicle to improve the comfort of passengers. The compressor is not powered for a long time, and when the compressor is not working, the power supply circuit of the compressor needs to stop supplying power to the compressor, so that the compressor is in a low-power consumption state, thereby reducing the static power consumption of the compressor. The power supply circuit of the compressor usually adopts a flyback power supply, and the flyback power supply is prone to generate a large EMI (Electromagnetic Interference), therefore, a complex EMC (Electro Magnetic Compatibility) filter circuit needs to be designed to meet the requirement of electromagnetic compatibility, but the complex EMC filter circuit requires more components, which increases the cost of the hardware circuit, and because of the more components, the connection line becomes complex, which may affect the reliability of the power supply circuit. CONTENT OF THE UTILITY MODEL

[0003] The utility model aims at solving one of the technical problems in the related art at least to some extent. To this end, the first purpose of the utility model is to provide a compressor power supply circuit, which adopts an LLC switching power supply instead of a flyback power supply, because the LLC switching power supply reduces high-frequency switching noise, so the electromagnetic interference of the power supply circuit can be reduced, the EMC requirement can be met, and the efficiency and power density of the power supply circuit can be improved.

[0004] The second purpose of the utility model is to provide a compressor.

[0005] The third purpose of the utility model is to provide a vehicle.

[0006] To achieve the above object, the utility model discloses a compressor power supply circuit, comprising: LLC switching power supply, the input of LLC switching power supply is suitable for connecting low voltage power supply, the output of LLC switching power supply is suitable for connecting the driver and the controller of compressor, LLC switching power supply is configured to generate first power supply and second power supply according to low voltage power supply, and the first power supply is provided to the driver, so that the driver drives the compressor motor, and the second power supply is provided to the controller, wherein, the driver and the controller are arranged in high voltage area respectively;The communication unit of low voltage area is set, and the communication unit is suitable for receiving dormancy instruction;Isolation communication unit, the input of isolation communication unit is connected with communication unit, and the output of isolation communication unit is suitable for connecting the controller, and isolation communication unit is configured to isolate transmission to the controller with dormancy instruction, so that the controller generates dormancy control signal according to dormancy instruction, and the dormancy control signal is isolated transmission to communication unit, so that communication unit enters dormancy state according to dormancy control signal, and controls LLC switching power supply to enter dormancy state.

[0007] The compressor power supply circuit according to the utility model embodiment, comprising LLC switching power supply, the communication unit of low voltage area and isolation communication unit, LLC switching power supply generates first power supply and second power supply according to low voltage power supply, and the first power supply is provided to the driver, and the second power supply is provided to the controller, the communication unit is suitable for receiving dormancy instruction, and isolation communication unit isolates transmission to the controller with dormancy instruction, so that the controller generates dormancy control signal according to dormancy instruction, and the dormancy control signal is isolated transmission to communication unit, so that communication unit enters dormancy state according to dormancy control signal, and controls LLC switching power supply to enter dormancy state. Therefore, when receiving the dormancy instruction, the communication unit isolates transmission to the controller with the dormancy instruction through the isolation communication unit, the controller generates the dormancy control signal according to the dormancy instruction, and transmits the dormancy control signal to the communication unit through the isolation communication unit, the communication unit enters the dormancy state according to the dormancy control instruction, and controls the LLC switching power supply to enter the dormancy state, after the LLC switching power supply enters the dormancy state, stops providing the first power supply and the second power supply, so that the driver and the controller enter the dormancy state, so that the compressor is in the low power consumption state, wherein, the LLC switching power supply is based on the resonance work, therefore, the LLC switching power supply reduces the high frequency switching noise, so the electromagnetic interference of the power supply circuit can be reduced, the EMC requirement can be met, and due to the reduction of switching loss, the LLC switching power supply can use less and more compact components, so as to improve the efficiency and power density of the power supply circuit.

[0008] According to an embodiment of the utility model, LLC switching power supply includes: switching module, switching module's input end is suitable for connecting low voltage power supply, switching module is configured to generate square wave signal according to low voltage power supply, resonant cavity, resonant cavity's input end links with switching module's output end, resonant cavity is configured to generate sinusoidal signal according to square wave signal, transformer, one end of primary winding in transformer links with the output end of resonant cavity to provide the electric energy of sinusoidal signal from primary winding to secondary winding, output module, output module's input end links with secondary winding, output module's output end is suitable for connecting driver and controller, output module is configured to generate first power supply and second power supply according to the electric energy coupled to secondary winding, and provides first power supply for driver and second power supply for controller, control module, control module's input end links with communication unit, control module's output end links with switching module, control module is configured to control switching module according to preset switching frequency, and enters dormancy state after receiving the dormancy signal sent by communication unit to make output module stop generating first power supply and second power supply.

[0009] According to an embodiment of the utility model, output module includes: rectifier submodule, rectifier submodule's input end links with secondary winding to generate direct current signal according to the electric energy coupled to secondary winding, first voltage transformation submodule, first voltage transformation submodule's input end links with rectifier submodule's output end, first voltage transformation submodule's output end is suitable for connecting driver, and first voltage transformation submodule is configured to voltage transformation direct current signal, generates first power supply, second voltage transformation submodule, second voltage transformation submodule's input end links with first voltage transformation submodule's output end, second voltage transformation submodule's output end is suitable for connecting controller, and second voltage transformation submodule is configured to voltage transformation second power supply, generates second power supply.

[0010] According to an embodiment of the utility model, secondary winding includes first secondary winding and second secondary winding, and output module includes first output module and second output module, the input end of first output module links with first secondary winding, the output end of first output module is suitable for connecting driver, and first output module is configured to generate first power supply according to the electric energy coupled to first secondary winding, the input end of second output module links with second secondary winding, the output end of second output module is suitable for connecting driver, and second output module is configured to generate first power supply according to the electric energy coupled to first secondary winding.

[0011] According to one embodiment of the utility model, first output module includes: first rectifier submodule, the input of first rectifier submodule is connected with first secondary winding, so that the first direct current signal is generated according to the electric energy coupled to first secondary winding, first voltage conversion submodule, the output of first rectifier submodule is connected with the input of first voltage conversion submodule, the output of first voltage conversion submodule is suitable for connecting driver, first voltage conversion submodule is configured to voltage conversion for first direct current signal, generates first power supply.

[0012] According to one embodiment of the utility model, second output module includes: second rectifier submodule, the input of second rectifier submodule is connected with second secondary winding, so that the second direct current signal is generated according to the electric energy coupled to second secondary winding, second voltage conversion submodule, the output of second rectifier submodule is connected with the input of second voltage conversion submodule, the output of second voltage conversion submodule is suitable for connecting driver, second voltage conversion submodule is configured to voltage conversion for second direct current signal, generates second power supply.

[0013] According to one embodiment of the utility model, switch module includes: first switch tube, the drain of first switch tube is suitable for connecting low voltage power supply, the gate of first switch tube is connected with control module, the source of first switch tube is connected with one end of primary winding, and has first node, second switch tube, the drain of second switch tube is connected with first node, the gate of second switch tube is connected with control module, the source of second switch tube is grounded.

[0014] According to one embodiment of the utility model, resonant cavity includes: first capacitor, one end of first capacitor is connected with the drain of first switch tube, the other end of first capacitor is connected with the other end of primary winding, and has second node, second capacitor, one end of second capacitor is connected with second node, the other end of second capacitor is connected with the source of second switch tube and then grounded.

[0015] According to one embodiment of the utility model, switch module and control module are integrated in the same chip.

[0016] According to one embodiment of the utility model, compressor power supply circuit further includes: voltage conversion unit arranged in low voltage area, the input of voltage conversion unit is suitable for connecting low voltage power supply, the output of voltage conversion unit is connected with the enablement of control module, the output of communication unit is connected with the enablement of voltage conversion unit, voltage conversion unit is configured to voltage conversion for low voltage power supply, generates third power supply, to power communication unit, and enters dormancy state to make control module enter dormancy state after receiving the dormancy signal sent by communication unit.

[0017] According to one embodiment of the present application, the compressor power supply circuit further comprises: a filter unit, the filter unit is adapted to be connected to the low-voltage power supply to filter the low-voltage power supply, and provide the filtered low-voltage power supply to the LLC switching power supply.

[0018] According to one embodiment of the present application, the filter unit comprises: a first diode, an anode of the first diode is adapted to be connected to the low-voltage power supply; a first inductor, one end of the first inductor is connected to a cathode of the first diode, and the other end of the first inductor is connected to the LLC switching power supply; a second inductor, one end and the other end of the second inductor are grounded; a third capacitor, one end of the third capacitor is connected to the other end of the first inductor, and the other end of the third capacitor is grounded; and a fourth capacitor, one end of the fourth capacitor is connected to the other end of the second inductor, and the other end of the fourth capacitor is grounded.

[0019] To achieve the above purpose, according to the second aspect of the present application, a compressor is provided, which comprises the compressor power supply circuit of any of the preceding embodiments.

[0020] According to the compressor of the present application, by using the compressor power supply circuit as described above, the LLC switching power supply is used to replace the flyback power supply, because the LLC switching power supply reduces high-frequency switching noise, so that the electromagnetic interference of the power supply circuit can be reduced, the EMC requirement can be met, and the efficiency and power density of the power supply circuit can be improved.

[0021] To achieve the above purpose, according to the third aspect of the present application, a vehicle is provided, which comprises the compressor as described above.

[0022] According to the vehicle of the present application, by using the compressor as described above, the LLC switching power supply is used to replace the flyback power supply, because the LLC switching power supply reduces high-frequency switching noise, so that the electromagnetic interference of the power supply circuit can be reduced, the EMC requirement can be met, and the efficiency and power density of the power supply circuit can be improved.

[0023] The additional aspects and advantages of the present application will be partially given in the following description, partially will become obvious from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a structural schematic diagram of the compressor power supply circuit according to one embodiment of the present application;

[0025] Figure 2 is a structural schematic diagram of the LLC switching power supply according to one embodiment of the present application;

[0026] Figure 3 is a circuit diagram of the output module according to one embodiment of the present application;

[0027] Figure 4 This is a circuit diagram of a first output module and a second output module according to an embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram of the structure of a compressor power supply circuit including a voltage conversion unit according to an embodiment of the present invention;

[0029] Figure 6 This is a schematic diagram of the structure of a compressor power supply circuit including a filter unit according to an embodiment of the present invention;

[0030] Figure 7 This is a circuit diagram of a filter unit according to an embodiment of the present invention;

[0031] Figure 8 This is a schematic diagram of the structure of a compressor according to an embodiment of the present invention;

[0032] Figure 9 This is a structural schematic diagram of a vehicle according to an embodiment of the present invention. Detailed Implementation

[0033] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0034] The following description, with reference to the accompanying drawings, describes an embodiment of the present invention, including a compressor power supply circuit, a compressor, and a vehicle.

[0035] Figure 1 This is a schematic diagram of the compressor power supply circuit according to an embodiment of the present invention. Figure 1 As shown, the compressor power supply circuit 100 includes: LLC (resonant conversion circuit) switching power supply 10, communication unit 20 and isolation communication unit 30 located in the low-pressure zone 1000.

[0036] The input end of the LLC switching power supply 10 is adapted to be connected with a low-voltage power supply, the output end of the LLC switching power supply 10 is adapted to be connected with a driver 200 and a controller 300 of the compressor, the LLC switching power supply 10 is configured to generate a first power supply V1 and a second power supply V2 according to the low-voltage power supply, and provide the first power supply V1 to the driver 200 so that the driver 200 drives a compressor motor (not shown), and provide the second power supply V2 to the controller 300, wherein the driver 200 and the controller 300 are respectively arranged in a high-voltage area 2000; the communication unit 20 is adapted to receive a sleep instruction; the input end of the isolation communication unit 30 is connected with the communication unit 20, the output end of the isolation communication unit 30 is adapted to be connected with the controller 300, and the isolation communication unit 30 is configured to isolate and transmit the sleep instruction to the controller 300, so that the controller 300 generates a sleep control signal according to the sleep instruction, and isolate and transmit the sleep control signal to the communication unit 20, so that the communication unit 20 enters a sleep state according to the sleep control signal, and controls the LLC switching power supply 10 to enter a sleep state.

[0037] Specifically, the LLC switching power supply 10 converts the low-voltage power supply into a high-frequency alternating voltage, and realizes zero-voltage switching and zero-current switching through a resonant inductor and a capacitor. The communication unit 20 is adapted to be connected with a vehicle controller 300 (not shown) to receive a sleep instruction sent by the vehicle controller 300. When the compressor does not need to sleep, the vehicle controller 300 does not send a sleep instruction to the communication unit 20, the LLC switching power supply 10 generates a first power supply V1 and a second power supply V2 according to the low-voltage power supply to supply power to the driver 200 and the controller 300, the communication unit 20 receives a control instruction from the vehicle controller 300, and transmits the control instruction to the controller 300 through the isolation communication unit 30, and the controller 300 controls the compressor according to the control instruction. When the compressor needs to sleep, the vehicle controller 300 sends a sleep instruction to the communication unit 20, the communication unit 20 transmits the sleep instruction to the controller 300 through the isolation communication unit 30, the controller 300 generates a sleep control signal according to the sleep instruction, and transmits the sleep control signal to the communication unit 20 through the isolation communication unit 30, the communication unit 20 enters a sleep state after receiving the sleep control signal, stops outputting a signal, so that the LLC switching power supply 10 enters a sleep state, and the LLC switching power supply 10 enters a sleep state, stops outputting the first power supply V1 and the second power supply V2, so that the driver 200 and the controller 300 enter a sleep state, and the compressor enters a low-power consumption state.

[0038] Further, when the vehicle controller 300 needs to wake up the compressor, the vehicle controller 300 sends a wake-up instruction to the communication unit 20, the communication unit 20 wakes up to make the LLC switching power supply 10 wake up, and the LLC switching power supply 10 supplies power to the driver 200 and the controller 300, so that the driver 200 and the controller 300 wake up, thereby realizing the wake-up of the compressor.

[0039] In an optional embodiment, the communication unit 20 and the vehicle controller 300 are connected in communication through one of the following communication modes: CAN (Controller Area Network), CAN FD (CAN with Flexible Data Rate), and LIN (Local Interconnect Network). The communication unit 20 transmits data to the isolation communication unit 30 through SPI (Serial Peripheral Interface), and the isolation communication unit 30 transmits data to the controller 300 through SPI.

[0040] It should be noted that the communication unit 20 can also be a control chip with communication function, so that the communication unit 20 can directly enter the sleep state according to the sleep instruction and make the LLC switching power supply 10 enter the sleep state, but in this way, there is one control chip on the high-voltage side and one control chip on the low-voltage side, which increases the hardware cost.

[0041] In the above embodiment, the compressor power supply circuit can make the compressor enter the sleep state after receiving the sleep instruction, thereby reducing the static power consumption of the compressor and enhancing the endurance; and the compressor power supply circuit is constructed based on the LLC switching power supply, the LLC switching power supply reduces high-frequency switching noise, so the electromagnetic interference of the power supply circuit can be reduced, the EMC requirement can be met, and due to the reduction of switching loss, the LLC switching power supply can use fewer and more compact components, thereby improving the efficiency and power density of the power supply circuit.

[0042] In some embodiments, as Figure 2As shown, the LLC switching power supply 10 comprises a switching module 11, a resonant cavity 12, a transformer 13, an output module 14 and a control module 15, wherein the input end of the switching module 11 is adapted to be connected to a low-voltage power supply, the switching module 11 is configured to generate a square wave signal according to the low-voltage power supply; the input end of the resonant cavity 12 is connected to the output end of the switching module 11, the resonant cavity 12 is configured to generate a sinusoidal signal according to the square wave signal; one end of the primary winding N1 in the transformer 13 is connected to the output end of the resonant cavity 12, so as to couple the electrical energy provided by the sinusoidal signal from the primary winding N1 to the secondary winding N2; the input end of the output module 14 is connected to the secondary winding N2, the output end of the output module 14 is adapted to be connected to the driver 200 and the controller 300, the output module 14 is configured to generate the first power supply V1 and the second power supply V2 according to the electrical energy coupled to the secondary winding N2, and provide the first power supply V1 to the driver 200 and the second power supply V2 to the controller 300; the input end of the control module 15 is connected to the communication unit 20, the output end of the control module 15 is connected to the switching module 11, the control module 15 is configured to control the switching module 11 according to the preset switching frequency, and enter the sleep state after receiving the sleep signal sent by the communication unit 20, so as to make the output module 14 stop generating the first power supply V1 and the second power supply V2.

[0043] Specifically, when the compressor power supply circuit 100 works normally, the control module 15 controls the switching module 11 according to the preset switching frequency, the switching module 11 converts the low-voltage power supply into a square wave signal, the square wave signal is input into the resonant cavity 12, the resonant cavity 12 generates a sinusoidal signal according to the square wave signal, and then transmits it to the secondary winding N2 side through the transformer 13, the output module 14 generates the first power supply V1 and the second power supply V2 according to the electrical energy coupled to the secondary winding N2, and supplies power to the driver 200 and the controller 300. When the communication unit 20 receives the sleep control signal sent by the controller 300 through the isolation communication unit 30, it will enter the sleep state, generate a sleep signal, and the control module 15 stops working, and the switching module 11 is in an off state, therefore, the output module 14 stops generating the first power supply V1 and the second power supply V2.

[0044] In some embodiments, as Figure 3As shown, the output module 14 comprises a rectifier sub-module 141, a first voltage conversion sub-module 142 and a second voltage conversion sub-module 143. The input of the rectifier sub-module 141 is connected to the secondary winding N2 to generate a direct current signal according to the electric energy coupled to the secondary winding N2. The input of the first voltage conversion sub-module 142 is connected to the output of the rectifier sub-module 141, and the output of the first voltage conversion sub-module 142 is adapted to be connected to the driver 200. The first voltage conversion sub-module 142 is configured to convert the voltage of the direct current signal to generate the first power supply V1. The input of the second voltage conversion sub-module 143 is connected to the output of the first voltage conversion sub-module 142, and the output of the second voltage conversion sub-module 143 is adapted to be connected to the controller 300. The second voltage conversion sub-module 143 is configured to convert the voltage of the first power supply V1 to generate the second power supply V2.

[0045] Specifically, the rectifier sub-module 141 rectifies the electric energy coupled to the secondary winding N2 to generate a direct current signal. Because the power supply voltage of the driver 200 and the power supply voltage of the controller 300 are different, two voltage conversion sub-modules are needed to convert the voltage of the direct current signal. The first voltage conversion sub-module 142 is adapted to be connected to the driver 200, and thus the first voltage conversion sub-module 142 is configured to supply power to the driver 200. The first voltage conversion sub-module 142 converts the voltage of the direct current signal to generate the first power supply V1 to supply power to the driver 200. The second voltage conversion sub-module 143 is adapted to be connected to the controller 300, and thus the second voltage conversion sub-module 143 is configured to supply power to the controller 300. The second voltage conversion sub-module 143 converts the voltage of the first power supply V1 to generate the second power supply V2 to supply power to the controller 300.

[0046] It should be noted that the first power supply V1 is 15V, and the second power supply V2 is 3.3V. The driver 200 can comprise an IGBT (Insulate-Gate Bipolar Transistor).

[0047] In an alternative embodiment, as shown in FIG. 2, the output module 14 comprises a rectifier sub-module 141, a first voltage conversion sub-module 142 and a second voltage conversion sub-module 143. The input of the rectifier sub-module 141 is connected to the secondary winding N2 to generate a direct current signal according to the electric energy coupled to the secondary winding N2. The input of the first voltage conversion sub-module 142 is connected to the output of the rectifier sub-module 141, and the output of the first voltage conversion sub-module 142 is adapted to be connected to the driver 200. The first voltage conversion sub-module 142 is configured to convert the voltage of the direct current signal to generate the first power supply V1. The input of the second voltage conversion sub-module 143 is connected to the output of the first voltage conversion sub-module 142, and the output of the second voltage conversion sub-module 143 is adapted to be connected to the controller 300. The second voltage conversion sub-module 143 is configured to convert the voltage of the first power supply V1 to generate the second power supply V2. Figure 3As shown, the rectifier submodule 141 is a voltage doubler rectifier. The rectifier submodule 141 includes a fifth capacitor C5, a sixth capacitor C6, a second diode D2, a third diode D3, and a seventh capacitor C7. One end of the fifth capacitor C5 is connected to one end of the secondary winding N2 and one end of the sixth capacitor C6, respectively. The other end of the fifth capacitor C5 is connected to the cathode of the second diode D2. The other end of the sixth capacitor C6 is connected to the anode of the third diode D3. The anode of the second diode D2 is connected to the other end of the secondary winding N2 and the cathode of the third diode D3, respectively. One end of the seventh capacitor C7 is connected to the cathode of the second diode D2, and the other end of the seventh capacitor C7 is connected to the anode of the third diode D3.

[0048] In the above embodiment, only one secondary winding and one rectifier submodule are used. The two voltage conversion submodules in the output module perform voltage conversion to generate the first power supply and the second power supply. This reduces the number of components used, which can further reduce the size of the power supply circuit and lower the cost of the power supply circuit.

[0049] In some embodiments, such as Figure 4 As shown, the secondary winding N2 includes a primary winding N21 and a secondary winding N22. The output module includes a first output module 16 and a second output module 17. The input terminal of the first output module 16 is connected to the primary winding N21, and the output terminal of the first output module 16 is adapted to connect to the driver 200. The first output module 16 is configured to generate a first power supply V1 based on the electrical energy coupled to the primary winding N21. The input terminal of the second output module 17 is connected to the secondary winding N22, and the output terminal of the second output module 17 is adapted to connect to the driver 200. The second output module 17 is configured to generate a second power supply V2 based on the electrical energy coupled to the secondary winding N22.

[0050] Specifically, the secondary side of transformer 13 may also have two secondary windings, N21 and N22, each with a corresponding output module. Transformer 13 couples the electrical energy provided by the sinusoidal signal from the primary winding N1 to the primary winding N21 and the secondary winding N22. The input terminal of the first output module 16 is connected to the primary winding N21, and generates a first power supply V1 based on the electrical energy coupled to the primary winding N21 to power the driver 200. The input terminal of the second output module 17 is connected to the secondary winding N22, and generates a second power supply V2 based on the electrical energy coupled to the secondary winding N22 to power the controller 300.

[0051] In the above embodiment, the secondary side of the transformer can also be provided with two secondary windings, each of which is connected with an output module, the first output module outputs the first power supply, and the second output module outputs the second power supply. However, this way will increase a secondary winding and an output module, and more components are used, and the circuit cost is higher. Therefore, a suitable circuit can be selected according to actual needs.

[0052] In some embodiments, as shown in Figure 4 The first output module 16 includes a first rectification sub-module 161 and a first voltage transformation sub-module 142. The input end of the first rectification sub-module 161 is connected with the first secondary winding N21 to generate a first direct current signal according to the electrical energy coupled to the first secondary winding N21. The input end of the first voltage transformation sub-module 142 is connected with the output end of the first rectification sub-module 161, and the output end of the first voltage transformation sub-module 142 is adapted to be connected with the driver 200. The first voltage transformation sub-module 142 is configured to perform voltage transformation on the first direct current signal to generate the first power supply V1.

[0053] Specifically, the first rectification sub-module 161 rectifies the electrical energy coupled to the first secondary winding N21 to generate the first direct current signal. The first voltage transformation sub-module 142 is adapted to be connected with the driver 200, and the first voltage transformation sub-module 142 performs voltage transformation on the first direct current signal to generate the first power supply V1 to power the driver 200.

[0054] In an alternative embodiment, as shown in Figure 4 The first rectification sub-module 161 can also be a voltage doubler rectifier. The first rectification sub-module 161 includes an eighth capacitor C8, a ninth capacitor C9, a fourth diode D4, a fifth diode D5, and a tenth capacitor C10. One end of the eighth capacitor C8 is connected with one end of the first secondary winding N21 and one end of the ninth capacitor C9, respectively. The other end of the eighth capacitor C8 is connected with the cathode of the fourth diode D4. The other end of the ninth capacitor C9 is connected with the anode of the fifth diode D5. The anode of the fourth diode D4 is connected with the other end of the first secondary winding N21 and the cathode of the fifth diode D5, respectively. One end of the tenth capacitor C10 is connected with the cathode of the fourth diode D4, and the other end of the tenth capacitor C10 is connected with the anode of the fifth diode D5.

[0055] In some embodiments, as shown in Figure 4As shown, the second output module 17 includes a second rectifier submodule 171 and a second voltage conversion submodule 143. The input terminal of the second rectifier submodule 171 is connected to the second secondary winding N22 to generate a second DC signal based on the electrical energy coupled to the second secondary winding N22. The input terminal of the second voltage conversion submodule 143 is connected to the output terminal of the second rectifier module 171, and the output terminal of the second voltage conversion submodule 143 is adapted to connect to the driver 200. The second voltage conversion submodule 143 is configured to perform voltage conversion on the second DC signal to generate a second power supply V2.

[0056] Understandably, the structure of the second output module 17 is similar to that of the first output module 16. The second rectifier submodule 171 rectifies the electrical energy coupled to the second secondary winding N22 to generate a second DC signal. The second voltage conversion submodule 143 is adapted to connect to the controller 300, and the first voltage conversion submodule 142 performs voltage conversion on the second DC signal to generate a second power supply V2 to power the controller 300.

[0057] In one alternative implementation, such as Figure 4 As shown, the second rectifier submodule 171 can also be a voltage doubler rectifier. The second rectifier submodule 171 includes an eleventh capacitor C11, a twelfth capacitor C12, a sixth diode D6, a seventh diode D7, and a thirteenth capacitor C13. One end of the eleventh capacitor C11 is connected to one end of the second stage winding N22 and one end of the twelfth capacitor C12, respectively. The other end of the eleventh capacitor C11 is connected to the cathode of the sixth diode D6. The other end of the twelfth capacitor C12 is connected to the anode of the seventh diode D7. The anode of the sixth diode D6 is connected to the other end of the second stage winding N22 and the cathode of the seventh diode D7, respectively. One end of the thirteenth capacitor C13 is connected to the cathode of the sixth diode D6, and the other end of the thirteenth capacitor C13 is connected to the anode of the seventh diode D7.

[0058] It should be noted that the first voltage conversion submodule 142 and the second voltage conversion submodule 143 can be LDOs (Low Dropout Regulators), but they are not limited to LDOs. They can also be voltage conversion chips. No specific restrictions are made here.

[0059] In some embodiments, such as Figures 2 to 4As shown, the switching module 11 includes: a first switching transistor Q1 and a second switching transistor Q2, wherein the drain of the first switching transistor Q1 is adapted to be connected to a low-voltage power supply, the gate of the first switching transistor Q1 is connected to the control module 15, the source of the first switching transistor Q1 is connected to one end of the primary winding N1, and has a first node J1; the drain of the second switching transistor Q2 is connected to the first node J1, the gate of the second switching transistor Q2 is connected to the control module 15, and the source of the second switching transistor Q2 is grounded.

[0060] It is understood that the first switch Q1 and the second switch Q2 are MOS (Metal-Oxide-Semiconductor Field-Effect Transistor) transistors. The switching module 11 includes two switching transistors. Therefore, the LLC switching power supply 10 in this embodiment is a half-bridge resonant circuit. The first switch Q1 and the second switch Q2 are connected in the form of totem poles. The control module 15 generates a PWM (Pulse Width Modulation) signal according to a preset switching frequency, and then outputs the PWM signal to the gates of the first switch Q1 and the second switch Q2 to control the first switch Q1 and the second switch Q2 to turn on alternately.

[0061] It should be noted that in practical applications, the number of switching transistors in the switching module 11 is not limited to two, but needs to be set according to the LLC switching power supply 10. Assuming that the LLC switching power supply 10 is a full-bridge resonant circuit, the switching module 11 includes at least four switching transistors.

[0062] In some embodiments, such as Figures 2 to 4 As shown, the resonant cavity 12 includes: a first capacitor C1 and a second capacitor C2, wherein one end of the first capacitor C1 is connected to the drain of the first switching transistor Q1, the other end of the first capacitor C1 is connected to the other end of the primary winding N1, and has a second node J2; one end of the second capacitor C2 is connected to the second node J2, and the other end of the second capacitor C2 is connected to the source of the second switching transistor Q2 and then grounded.

[0063] Specifically, when the first switch Q1 is turned on and the second switch Q2 is turned off, the second capacitor C2 is charged, and the voltage across the second capacitor C2 rises, while the first capacitor C1 is discharged, and the voltage across the first capacitor C1 falls. When the first switch Q1 is turned off and the second switch Q2 is turned on, the first capacitor C1 is charged, and the voltage across the first capacitor C1 rises, while the second capacitor C2 is discharged, and the voltage across the second capacitor C2 falls.

[0064] Furthermore, in some embodiments, the switch module 11 and the control module 15 are integrated within the same chip.

[0065] That is, the switch module 11 and the control module 15 are integrated together, which can further reduce the volume of the circuit, and it is easier to carry out electromagnetic compatibility design, further reducing EMI interference.

[0066] In some embodiments, as shown in Figure 5 The compressor power supply circuit 100 further comprises a voltage conversion unit 40 arranged in the low-voltage area 1000, an input end of the voltage conversion unit 40 is adapted to be connected to the low-voltage power supply, an output end of the voltage conversion unit 40 is connected to the enable end EN of the control module 15, an output end of the communication unit 20 is connected to the enable end EN of the voltage conversion unit 40, and the voltage conversion unit 40 is configured to convert the voltage of the low-voltage power supply to generate a third power supply V3 to power the communication unit 20, and enter the sleep state upon receiving the sleep signal sent by the communication unit 20, so as to make the control module 15 enter the sleep state.

[0067] Specifically, when the compressor power supply circuit 100 is working normally, the voltage conversion unit 40 converts the voltage of the low-voltage power supply to generate a third power supply V3 to power the communication unit 20, and the enable end EN of the control module 15 is high, so the control module 15 controls the switch module 11 to work according to the preset switching frequency. When the communication unit 20 enters the sleep state, the communication unit 20 sends a low-level sleep signal to the voltage conversion unit 40, so the enable end EN signal of the voltage conversion unit 40 is low, and the voltage conversion unit 40 enters the sleep state. When the voltage conversion unit 40 enters the sleep state, the voltage conversion unit 40 stops outputting signals, so the enable end EN signal of the control module 15 is low, and therefore the control module 15 enters the sleep state and stops outputting PWM to the first switch tube Q1 and the second switch tube Q2. The first switch tube Q1 and the second switch tube Q2 are turned off, and the output module 14 stops outputting the first power supply V1 and the second power supply V2.

[0068] It should be noted that the voltage conversion unit 40 can also be an LDO or a voltage conversion chip, which is not limited here.

[0069] In some embodiments, as shown in Figure 6 The compressor power supply circuit 100 further comprises a filter unit 50, and the filter unit 50 is adapted to be connected to the low-voltage power supply to filter the low-voltage power supply, and provide the filtered low-voltage power supply to the LLC switch power supply 10.

[0070] That is, the filter unit 50 is arranged between the low-voltage power supply and the LLC switch power supply 10, and the filter unit 50 filters the low-voltage power supply and provides the filtered low-voltage power supply to the LLC switch power supply 10.

[0071] Further, the filter unit 50 also provides the filtered low-voltage power supply to the voltage conversion unit 40 and the communication unit 20, so that the voltage conversion unit 40 performs voltage conversion on the filtered low-voltage power supply.

[0072] In some embodiments, as shown in Figure 7 The filter unit 50 includes a first diode D1, a first inductor L1, a second inductor L2, a third capacitor C3 and a fourth capacitor C4, wherein the anode of the first diode D1 is adapted to be connected to the low-voltage power supply; one end of the first inductor L1 is connected to the cathode of the first diode D1, and the other end of the first inductor L1 is connected to the LLC switching power supply 10; one end and the other end of the second inductor L2 are grounded; one end of the third capacitor C3 is connected to the other end of the first inductor L1, and the other end of the third capacitor C3 is grounded; one end of the fourth capacitor C4 is connected to the other end of the second inductor L2, and the other end of the fourth capacitor C4 is grounded.

[0073] Specifically, the filter unit 50 of the present embodiment is a differential mode filter circuit. The first diode D1 can be a Schottky diode, which can prevent reverse connection of the power supply. The first inductor L1 and the second inductor L2 are differential mode inductors, which can reduce high-frequency noise, and the third capacitor C3 and the fourth capacitor C4 are differential mode capacitors, which can have a smoothing effect.

[0074] In an alternative embodiment, the filter unit 50 further includes a fourteenth capacitor C14, a fifteenth capacitor C15 and a sixteenth capacitor C16, wherein one end of the fourteenth capacitor C14 is connected to the cathode of the first diode D1, and the other end of the fourteenth capacitor C14 is grounded, and the fifteenth capacitor C15 and the sixteenth capacitor C16 are connected in parallel and arranged between one end of the third capacitor C3 and one end of the fourth capacitor C4, so that a more smoothed power supply can be obtained.

[0075] In the above embodiment, the first diode can prevent reverse connection of the power supply, thereby improving the safety of the compressor power supply circuit, and the differential mode filter circuit composed of the first inductor, the second inductor, the third capacitor and the fourth capacitor filters the low-voltage power supply, which can further suppress electromagnetic interference, thereby meeting the EMC requirement.

[0076] In summary, according to the compressor power supply circuit of the embodiment of the utility model, including LLC switching power supply, communication unit and isolation communication unit set in low voltage area, LLC switching power supply generates first power supply and second power supply according to low voltage power supply, and provides first power supply for driver, and provides second power supply for controller, communication unit is suitable for receiving dormancy instruction, isolation communication unit transmits dormancy instruction to controller, so that controller generates dormancy control signal according to dormancy instruction, and transmits dormancy control signal to communication unit, so that communication unit enters dormancy state according to dormancy control signal, and controls LLC switching power supply to enter dormancy state. Thus, when the communication unit receives the sleep instruction, the sleep instruction is transmitted to the controller through the isolation communication unit, the controller generates the sleep control signal according to the sleep instruction, and transmits the sleep control signal to the communication unit through the isolation communication unit, the communication unit enters the sleep state according to the sleep control instruction, and controls the LLC switching power supply to enter the sleep state, the LLC switching power supply enters the sleep state, stops providing the first power supply and the second power supply, so that the driver and the controller enter the sleep state, so that the compressor is in a low-power state, wherein the LLC switching power supply is based on the resonance operation, therefore, the LLC switching power supply reduces the high-frequency switching noise, so that the electromagnetic interference of the power supply circuit can be reduced, the EMC requirement can be met, and, due to the reduction of switching loss, the LLC switching power supply can use fewer and more compact components, so that the efficiency and power density of the power supply circuit are improved.

[0077] Corresponding to the above embodiment, the embodiment of the utility model further proposes a kind of compressor. As shown in Figure 8 Compressor 3000 includes the compressor power supply circuit 100 of any embodiment described above.

[0078] According to the compressor of the embodiment of the utility model, by using the compressor power supply circuit described above, LLC switching power supply is used instead of flyback power supply, because LLC switching power supply reduces high-frequency switching noise, so that the electromagnetic interference of power supply circuit can be reduced, EMC requirement can be met, and, LLC switching power supply can also improve the efficiency and power density of power supply circuit.

[0079] Corresponding to the above embodiment, the embodiment of the utility model further proposes a kind of vehicle. As shown in Figure 9 Vehicle 4000 includes the compressor 3000 described above.

[0080] According to the vehicle 4000 of the embodiment of the present application, the compressor 3000 described in any of the above embodiments is adopted. Here, the vehicle 4000 can be a new energy vehicle, and in some embodiments, the new energy vehicle can be a pure electric vehicle with a motor as the main driving force, and in other embodiments, the new energy vehicle can also be a hybrid vehicle with an internal combustion engine and a motor as the main driving force. As for the internal combustion engine and the motor mentioned in the above embodiments to provide driving force for the new energy vehicle, the internal combustion engine can use gasoline, diesel, hydrogen, etc. as fuel, and the way to provide power for the motor can use power batteries, hydrogen fuel cells, etc., which are not specially limited here. It should be noted that this is only an exemplary description of the structure of the new energy vehicle, and is not intended to limit the scope of protection of the present application.

[0081] According to the vehicle of the embodiment of the present application, by adopting the above compressor, LLC switching power supply is adopted instead of flyback power supply, because LLC switching power supply reduces high-frequency switching noise, so that the electromagnetic interference of the power supply circuit can be reduced, the EMC requirement can be met, and the efficiency and power density of the power supply circuit can be improved.

[0082] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the description of the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0083] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0084] In addition, the terms "first", "second" and the like in the embodiments of the present application are used only for the purpose of description and can not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated in the embodiments. Therefore, the features defined by the terms "first", "second" and the like in the embodiments of the present application can be explicitly or implicitly indicated to include at least one of the features in the embodiments. In the description of the present application, the meaning of the word "plurality" is at least two or two or more, for example, two, three, four, etc., unless otherwise specifically limited in the embodiments.

[0085] In the present application, unless otherwise specifically provided or limited in the embodiments, the terms "mounting", "connecting", "connecting" and "fixing" and the like appearing in the embodiments should be understood in a broad sense, for example, the connection can be fixed connection, or detachable connection, or integrated, which can be understood, or mechanical connection, electrical connection, etc. Of course, it can also be directly connected, or indirectly connected through an intermediate medium, or it can be the communication between two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific implementation situation.

[0086] In the present application, unless otherwise specifically provided and limited, the first feature "on" or "under" the second feature can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0087] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and can not be understood as limiting the present application, and those skilled in the art can make changes, modifications, replacements and modifications to the above embodiments within the scope of the present application.

Claims

1. A compressor power supply circuit, characterized in that, include: An LLC switching power supply, wherein the input terminal of the LLC switching power supply is adapted to connect to a low-voltage power supply, and the output terminal of the LLC switching power supply is adapted to connect to a compressor driver and a controller, the LLC switching power supply being configured to generate a first power supply and a second power supply based on the low-voltage power supply, and to provide the first power supply to the driver so that the driver drives the compressor motor, and to provide the second power supply to the controller, wherein the driver and the controller are respectively located in a high-voltage area; A communication unit located in a low-voltage area, the communication unit being adapted to receive sleep commands; An isolated communication unit is provided, wherein the input terminal of the isolated communication unit is connected to the communication unit, and the output terminal of the isolated communication unit is adapted to be connected to the controller. The isolated communication unit is configured to transmit the sleep command to the controller in isolation, so that the controller generates a sleep control signal according to the sleep command and transmits the sleep control signal to the communication unit in isolation, so that the communication unit enters a sleep state according to the sleep control signal and controls the LLC switching power supply to enter a sleep state.

2. The compressor power supply circuit according to claim 1, characterized in that, The LLC switching power supply includes: A switching module, the input of which is adapted to be connected to the low-voltage power supply, the switching module being configured to generate a square wave signal according to the low-voltage power supply; A resonant cavity, the input end of which is connected to the output end of the switching module, is configured to generate a sine wave signal based on the square wave signal; A transformer, wherein one end of the primary winding of the transformer is connected to the output end of the resonant cavity to couple the electrical energy provided by the sinusoidal signal from the primary winding to the secondary winding; An output module, wherein the input terminal of the output module is connected to the secondary winding, the output terminal of the output module is adapted to connect to the driver and the controller, and the output module is configured to generate a first power supply and a second power supply based on the electrical energy coupled to the secondary winding, and to provide the first power supply to the driver and the second power supply to the controller. The control module has its input terminal connected to the communication unit and its output terminal connected to the switch module. The control module is configured to control the switch module according to a preset switching frequency and enter a sleep state after receiving a sleep signal sent by the communication unit, so that the output module stops generating the first power supply and the second power supply.

3. The compressor power supply circuit according to claim 2, characterized in that, The output module includes: A rectifier module, the input of which is connected to the secondary winding to generate a DC signal based on the electrical energy coupled to the secondary winding; A first voltage conversion submodule, wherein the input terminal of the first voltage conversion submodule is connected to the output terminal of the rectifier submodule, and the output terminal of the first voltage conversion submodule is adapted to be connected to the driver, and the first voltage conversion submodule is configured to perform voltage conversion on the DC signal to generate the first power supply; A second voltage conversion submodule has its input terminal connected to the output terminal of the first voltage conversion submodule, and its output terminal adapted to be connected to the controller. The second voltage conversion submodule is configured to perform voltage conversion on the first power supply to generate the second power supply.

4. The compressor power supply circuit according to claim 2, characterized in that, The secondary winding includes a primary winding and a secondary winding. The output module includes a first output module and a second output module. The input terminal of the first output module is connected to the primary winding, and the output terminal of the first output module is adapted to be connected to the driver. The first output module is configured to generate a first power supply based on the electrical energy coupled to the primary winding. The input terminal of the second output module is connected to the secondary winding, and the output terminal of the second output module is adapted to be connected to the driver. The second output module is configured to generate a second power supply based on the electrical energy coupled to the secondary winding.

5. The compressor power supply circuit according to claim 4, characterized in that, The first output module includes: A first rectifier submodule, the input terminal of which is connected to the first primary winding, generates a first DC signal based on the electrical energy coupled to the first primary winding; A first voltage conversion submodule, the input terminal of which is connected to the output terminal of the first rectifier submodule, and the output terminal of which is adapted to be connected to the driver, the first voltage conversion submodule is configured to perform voltage conversion on the first DC signal to generate the first power supply.

6. The compressor power supply circuit according to claim 4, characterized in that, The second output module includes: The second rectifier module has its input terminal connected to the second stage winding to generate a second DC signal based on the electrical energy coupled to the second stage winding. The second voltage conversion submodule has its input terminal connected to the output terminal of the second rectifier submodule, and its output terminal adapted to be connected to the driver. The second voltage conversion submodule is configured to perform voltage conversion on the second DC signal to generate the second power supply.

7. The compressor power supply circuit according to claim 2, characterized in that, The switching module includes: The first switching transistor has a drain adapted to be connected to the low-voltage power supply, a gate connected to the control module, and a source connected to one end of the primary winding, and has a first node. The second switch has its drain connected to the first node, its gate connected to the control module, and its source grounded.

8. The compressor power supply circuit according to claim 7, characterized in that, The resonant cavity includes: A first capacitor, one end of which is connected to the drain of the first switching transistor, and the other end of which is connected to the other end of the primary winding, and has a second node; The second capacitor has one end connected to the second node, and the other end connected to the source of the second switch and then grounded.

9. The compressor power supply circuit according to any one of claims 2-8, characterized in that, The switching module and the control module are integrated within the same chip.

10. The compressor power supply circuit according to any one of claims 2-8, characterized in that, Also includes: A voltage conversion unit is installed in the low-voltage zone. The input terminal of the voltage conversion unit is adapted to be connected to the low-voltage power supply. The output terminal of the voltage conversion unit is connected to the enable terminal of the control module. The enable terminal of the voltage conversion unit is connected to the output terminal of the communication unit. The voltage conversion unit is configured to perform voltage conversion on the low-voltage power supply to generate a third power supply to power the communication unit. Upon receiving a sleep signal sent by the communication unit, the voltage conversion unit enters a sleep state, thereby causing the control module to enter a sleep state.

11. The compressor power supply circuit according to claim 1, characterized in that, Also includes: A filtering unit is provided, which is adapted to be connected to the low-voltage power supply to filter the low-voltage power supply and provide the filtered low-voltage power supply to the LLC switching power supply.

12. The compressor power supply circuit according to claim 11, characterized in that, The filtering unit includes: A first diode, the anode of which is adapted to be connected to the low-voltage power supply; A first inductor, one end of which is connected to the cathode of the first diode, and the other end of which is connected to the LLC switching power supply; The second inductor has one end and the other end grounded. A third capacitor, one end of which is connected to the other end of the first inductor, and the other end of which is grounded; A fourth capacitor, one end of which is connected to the other end of the second inductor, and the other end of which is grounded.

13. A compressor, characterized in that, Includes the compressor power supply circuit according to any one of claims 1-12.

14. A vehicle, characterized in that, Includes the compressor according to claim 13.

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