Controller, compressor and vehicle

Abstract

The utility model discloses a kind of controller, compressor and vehicle, the controller includes: power module, power module is integrated with multiple bridge arms, each bridge arm includes upper bridge switch tube and lower bridge switch tube;Drive chip, drive chip is independently set with power module, and the upper bridge drive output end of drive chip is connected with the control end of upper bridge switch tube, the lower bridge drive output end of drive chip is connected with the control end of lower bridge switch tube, to drive upper bridge switch tube and lower bridge switch tube conduction or turn off based on control signal. Thus, the controller will switch tube and drive chip be integrated respectively, improve the space utilization of PCB board, reduce circuit installation and design difficulty, and have better heat dissipation condition and higher operation reliability.

Description

Technical Field

[0001] This utility model relates to the field of power electronics technology, and in particular to a controller, a compressor, and a vehicle. Background Technology

[0002] In the field of electric vehicle air conditioning compressors, the technical solution of building inverter circuits using discrete components is usually adopted. However, this technical solution occupies a lot of space and has a complex circuit structure, which increases the application cost.

[0003] To solve the above technical problems, the related technologies adopt the intelligent power module solution, which integrates all the components of the inverter circuit together, but it has the problem of serious heat generation. Utility Model Content

[0004] This invention aims to at least partially solve one of the technical problems in the related art. Therefore, the first objective of this invention is to provide a controller that integrates the switching transistor and the driver chip separately, thereby improving the space utilization of the PCB (Printed Circuit Board), reducing the difficulty of circuit installation and design, and providing better heat dissipation and higher operational reliability.

[0005] The second objective of this invention is to provide a compressor.

[0006] The third objective of this utility model is to provide a vehicle.

[0007] To achieve the above objectives, the first aspect of this utility model proposes a controller, comprising: a power module integrating multiple bridge arms, each bridge arm including an upper bridge switch and a lower bridge switch; and a driver chip, which is set independently of the power module, wherein the upper bridge drive output terminal of the driver chip is connected to the control terminal of the upper bridge switch, and the lower bridge drive output terminal of the driver chip is connected to the control terminal of the lower bridge switch, for driving the upper bridge switch and the lower bridge switch to be turned on or off based on a control signal.

[0008] According to the controller of this utility model, the power module integrates multiple bridge arms, each including an upper bridge switch and a lower bridge switch. The driver chip is set independently of the power module, and the upper bridge drive output terminal of the driver chip is connected to the control terminal of the upper bridge switch, while the lower bridge drive output terminal of the driver chip is connected to the control terminal of the lower bridge switch. The driver chip drives the upper and lower bridge switches to turn on or off based on control signals. Thus, this controller integrates the switches and driver chip separately, improving the space utilization of the PCB board, reducing the difficulty of circuit installation and design, and providing better heat dissipation and higher operational reliability.

[0009] In addition, the controller according to the above embodiments of the present invention may also have the following additional technical features:

[0010] Specifically, the upper-bridge switch and the lower-bridge switch are one or more of HEMT (High Electron Mobility Transistor), MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor), and IGBT (Insulated Gate Bipolar Transistor). When the switch is an HEMT, the control terminal of the switch is connected to the corresponding drive output terminal of the driver chip through a filter inductor. When the switch is a MOSFET, the control terminal of the switch is connected to the corresponding drive output terminal of the driver chip through a drive resistor. When the switch is an IGBT, the control terminal of the switch is connected to the corresponding drive output terminal of the driver chip through a drive resistor, and a freewheeling diode is connected in parallel with the switch.

[0011] Specifically, the first terminal of the upper bridge switch is connected to the high voltage input terminal, the second terminal of the upper bridge switch is connected to the first terminal of the lower bridge switch, and the second terminal of the lower bridge switch is connected to the low voltage drive return terminal of the driver chip; wherein, in the case of the switch being a HEMT, a filter capacitor is also connected in series between the first terminal of the upper bridge switch and the second terminal of the lower bridge switch.

[0012] Specifically, after the second end of the upper bridge switch and the first end of the lower bridge switch are connected, they are also connected to the negative terminal of the upper bridge floating power supply of the driver chip. A bootstrap capacitor is connected in series between the negative terminal of the upper bridge floating power supply and the positive terminal of the upper bridge floating power supply of the driver chip. A bootstrap diode is connected in series between the positive terminal of the upper bridge floating power supply and the power supply terminal of the driver chip, and the anode of the bootstrap diode is connected to the power supply terminal of the driver chip.

[0013] Furthermore, the controller also includes: a current detection module, which is connected to the second terminal of the lower bridge switch and the overcurrent detection input terminal of the driver chip, respectively, to detect the operating current of the power module and output a corresponding detection voltage; the driver chip integrates an overcurrent detection unit, the first input terminal of which is connected to the overcurrent detection input terminal, and the second input terminal of which is connected to the reference terminal, to output an overcurrent signal when the detection voltage is greater than the reference voltage provided by the reference terminal, and to output a non-overcurrent signal when the detection voltage is less than the reference voltage.

[0014] Furthermore, the controller also includes: a delay circuit, which is connected to the power supply terminal and the fault clearing delay input terminal of the driver chip respectively; the driver chip also integrates a control unit, which is connected to the output terminal of the overcurrent detection unit, the fault clearing delay input terminal and the fault signal output terminal of the driver chip respectively, to control the fault signal output terminal to output an overcurrent fault signal and control the delay circuit to discharge based on the overcurrent signal, and to control the delay circuit to perform a delay based on the non-overcurrent signal, and to control the fault signal output terminal to output an overcurrent fault recovery signal after the delay circuit finishes its delay.

[0015] Specifically, the delay circuit includes: a delay resistor, one end of which is connected to the power supply terminal of the driver chip; and a delay capacitor, one end of which is connected to the other end of the delay resistor and the fault clear delay input terminal, and the other end of which is connected to the logic ground of the driver chip.

[0016] Specifically, the control unit includes: a first switching transistor, the control terminal of which is connected to the output terminal of the overcurrent detection unit, the first terminal of which is connected to the fault clearing delay input terminal, and the second terminal of which is grounded; a logic gate, the first input terminal of which is connected to the output terminal of the overcurrent detection unit, and the second input terminal of which is connected to the first terminal of the first switching transistor and the fault clearing delay input terminal respectively; and a second switching transistor, the control terminal of which is connected to the output terminal of the logic gate, the first terminal of which is connected to the fault signal output terminal, and the second terminal of which is grounded.

[0017] Specifically, the overcurrent detection unit includes: a sampling resistor, one end of which is connected to the second terminal of the lower bridge switch, and the other end of which is connected to the logic ground of the driver chip; and an operational amplifier, the input terminal of which is connected to both ends of the sampling resistor, and the output terminal of which is connected to the overcurrent detection input terminal.

[0018] Specifically, a filter capacitor is connected in series between the power supply terminal of the driver chip and the logic ground of the driver chip.

[0019] Furthermore, the controller also includes a main control chip, which is connected to the driver chip to output control signals.

[0020] To achieve the above objectives, a second aspect of this utility model provides a compressor, including the aforementioned controller.

[0021] The compressor according to the present invention, based on the above-described controller, reduces the design and installation difficulty and improves the operational reliability of the compressor.

[0022] To achieve the above objectives, a second aspect of this utility model provides a vehicle including the aforementioned controller or the aforementioned compressor.

[0023] The vehicle according to this utility model, based on the aforementioned controller or compressor, reduces design and installation difficulty and improves vehicle operational reliability.

[0024] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0025] Figure 1 This is a schematic diagram showing the connection of discrete technical solutions in related technologies;

[0026] Figure 2 This is a connection diagram of the intelligent power module in the related technology;

[0027] Figure 3 This is a connection diagram of a controller according to an embodiment of the present invention;

[0028] Figure 4 This is a connection diagram of the controller according to another embodiment of the present invention;

[0029] Figure 5 This is a circuit topology diagram of a controller according to a specific embodiment of the present invention;

[0030] Figure 6 This is a circuit topology diagram of a driver chip according to a specific embodiment of the present invention;

[0031] Figure 7 This is a block diagram of a compressor according to an embodiment of the present invention;

[0032] Figure 8 This is a block diagram of a vehicle according to an embodiment of the present invention;

[0033] Figure 9 This is a block diagram of a vehicle according to another embodiment of the present invention. Detailed Implementation

[0034] 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.

[0035] The controller, compressor, and vehicle proposed in this utility model are described below with reference to the accompanying drawings.

[0036] In the field of electric vehicle air conditioning compressors, a technical solution that typically employs discrete components to build the inverter circuit is used. Figure 1 As shown, however, this technical solution occupies a significant amount of space and has a complex circuit structure, increasing application costs. Additionally, related technologies also employ intelligent power module solutions, specifically... Figure 2 As shown, all components of the inverter circuit are integrated together to solve the problems of discrete technology solutions. However, the intelligent power module generates a lot of heat during operation, which reduces the operational reliability of the inverter circuit.

[0037] To address the aforementioned technical problems, this utility model proposes a controller that integrates the switching transistor and the driver chip separately. Compared to discrete solutions, this improves the space utilization of the PCB board and reduces the difficulty of circuit installation and design. Compared to intelligent power module solutions, it offers better heat dissipation and higher operational reliability.

[0038] The controller of this utility model will now be described in detail with reference to the accompanying drawings.

[0039] like Figure 3 As shown, the controller 100 of this utility model may include a power module 10 and a driver chip 20. The power module 10 integrates multiple bridge arms, each bridge arm including an upper bridge switch and a lower bridge switch. The driver chip 20 is set independently of the power module 10, and the upper bridge drive output terminal of the driver chip 20 is connected to the control terminal of the upper bridge switch, and the lower bridge drive output terminal of the driver chip 20 is connected to the control terminal of the lower bridge switch. The driver chip 20 is used to drive the upper bridge switch and the lower bridge switch to turn on or off based on the control signal.

[0040] Specifically, the driver chip 20 receives control signals and controls the upper and lower bridge switches of the power module 10 based on the received control signals. The power module 10 achieves AC-DC conversion output based on the conduction or cutoff of the upper and lower bridge switches. For example, the DC side of the power module 10 is connected to DC power, and the AC side of the power module 10 is connected to a motor. Under the control of the driver chip 20, it is used to convert DC power into AC power to drive the motor.

[0041] The power module 10 integrates the upper and lower bridge switches of each bridge arm, meaning it contains several power devices packaged together. These power devices can be IGBTs, MOSFETs, etc. For example, if the power module 10 includes three bridge arms, then each bridge arm has one upper and one lower bridge switch, and the power module 10 integrates six switches into a single package. In this case, the driver chip 20 is an integration of six driver sub-chips, and the output of each driver sub-chip is connected to the control terminals of the six switches in the power module 10. The driver chip 20 can be an isolated chip or a non-isolated chip; there are no specific limitations. In addition, the power module 10 and the driver chip 20 may also include a temperature detection unit, etc., with no specific limitations.

[0042] This embodiment integrates the driver chip and power device of the traditional discrete solution into a single device, which improves the space utilization of the PCB board, reduces the difficulty of installation and design, and has better heat dissipation and higher reliability compared with the intelligent power module solution.

[0043] Combination Figure 5 As shown, in one embodiment of the present invention, the controller 100 further includes a main control chip 50, which is connected to the driver chip 20 and is used to output control signals.

[0044] Specifically, continuing with the example of power module 10 comprising three bridge arms, combined with... Figure 6 As shown, ports "HIN1, 2, 3" of the driver chip 20 are connected to ports "HIN1, 2, 3" of the main control chip 50 to receive control signals corresponding to the three upper bridge arms; ports "LIN1, 2, 3" of the driver chip 20 are connected to ports "LIN1, 2, 3" of the main control chip 50 to receive control signals corresponding to the three upper bridge arms. Ports "HO1, 2, 3" of the driver chip 20 are connected to the control terminals of the three upper bridge switches of the power module 10 to send corresponding drive signals to control the on / off state of the three upper bridge arms; ports "LO1, 2, 3" of the driver chip 20 are connected to the control terminals of the three lower bridge switches of the power module 10 to send corresponding drive signals to control the on / off state of the three lower bridge arms. It should be noted that "HIN1,2,3", "LIN1,2,3", "HO1,2,3" and "LO1,2,3" are all simplifications of three ports. For example, "HIN1,2,3" includes "HIN1", "HIN2" and "HIN3".

[0045] During operation, the main control chip 50 sends corresponding control signals to the driver chip 20 based on "HIN1,2,3" and "HIN1,2,3". The driver chip 20 outputs corresponding drive signals to the control terminal of the switching transistor through "HO1,2,3" and "LO1,2,3" based on the received control signals, so as to control the switching transistor of the power module 10 to drive the external load such as the motor 200.

[0046] In one embodiment of this utility model, the upper bridge switch and the lower bridge switch are one or more of HEMT, MOSFET and IGBT, wherein when the switch is HEMT, the control terminal of the switch is connected to the corresponding drive output terminal of the driver chip 20 through a filter inductor; when the switch is MOSFET, the control terminal of the switch is connected to the corresponding drive output terminal of the driver chip 20 through a drive resistor; when the switch is IGBT, the control terminal of the switch is connected to the corresponding drive output terminal of the driver chip 20 through a drive resistor, and a freewheeling diode is connected in parallel with the switch.

[0047] Specifically, when the switching transistor is a HEMT, electromagnetic interference in the drive control signal is filtered out by a filter inductor to prevent the switching transistor from being mis-turned on.

[0048] When the switching transistor is a MOSFET, a drive resistor reduces drive circuit oscillation, preventing malfunctions of the switch. It also shares the drive power and adjusts the switching speed. The power of the drive resistor is determined by the gate drive power of the switching transistor; for example, the drive resistor power can be twice the gate drive power. To achieve faster drive performance, different drive resistors can be configured to achieve different turn-on and turn-off speeds.

[0049] When the switching transistor is an IGBT, in order to reduce the oscillation of the drive circuit, share the drive power, and adjust the switching speed through the drive circuit, the freewheeling diodes are connected in parallel to provide a current freewheeling path.

[0050] by Figure 5For example, in a power module 10, the switching transistors are MOSFETs, and three bridge arms are integrated. The upper bridge switch of the first bridge arm is HMOS1, and the lower bridge switch of the first bridge arm is LMOS1; the upper bridge switch of the second bridge arm is HMOS2, and the lower bridge switch of the second bridge arm is LMOS2; the upper bridge switch of the third bridge arm is HMOS3, and the lower bridge switch of the third bridge arm is LMOS3. The control terminals of the switching transistors include HO1 connected to the upper bridge switch HMOS1 via a first driving resistor, HO2 connected to the upper bridge switch HMOS2 via a second driving resistor, HO3 connected to the upper bridge switch HMOS3 via a third driving resistor, LO1 connected to the lower bridge switch LMOS1 via a fourth driving resistor, LO2 connected to the lower bridge switch LMOS2 via a fifth driving resistor, and LO3 connected to the lower bridge switch LMOS3 via a sixth driving resistor.

[0051] In one embodiment of this utility model, the first end of the upper bridge switch is connected to the high voltage input terminal HV_BUS, the second end of the upper bridge switch is connected to the first end of the lower bridge switch, and the second end of the lower bridge switch is connected to the low voltage drive return terminal COM of the driver chip 20; wherein, when the switch is a HEMT, a filter capacitor is also connected in series between the first end of the upper bridge switch and the second end of the lower bridge switch.

[0052] In other words, when the switching transistors are MOSFETs or IGBTs, the connection between the upper and lower bridge switching transistors... Figure 4 As shown. When the switching transistor is a HEMT, a filter capacitor is connected in series between the first terminal of the upper bridge switching transistor and the second terminal of the lower bridge switching transistor to filter out high-frequency noise generated by the external circuit.

[0053] In one embodiment of this utility model, after the second end of the upper bridge switch and the first end of the lower bridge switch are connected, they are also connected to the negative terminal Vs of the upper bridge floating power supply of the driver chip 20. A bootstrap capacitor C1 is connected in series between the negative terminal Vs of the upper bridge floating power supply and the positive terminal VB of the upper bridge floating power supply of the driver chip 20. A bootstrap diode D1 is connected in series between the positive terminal VB of the upper bridge floating power supply and the power supply terminal VCC of the driver chip 20. The anode of the bootstrap diode D1 is connected to the power supply terminal VCC of the driver chip 20.

[0054] In other words, a bootstrap circuit is formed by bootstrap capacitor C1 and bootstrap diode D1. The bootstrap circuit is used to increase the voltage for driving applications with high voltage requirements or for floating ground driving.

[0055] Combination Figure 5 and Figure 6As shown, in one embodiment of this utility model, the controller 100 further includes: a current detection module 30, which is connected to the second terminal of the lower bridge switch and the overcurrent detection input terminal ITRIIP of the driver chip 20, respectively, to detect the operating current of the power module 10 and output a corresponding detection voltage V0; the driver chip 20 integrates an overcurrent detection unit 21, the first input terminal of the overcurrent detection unit 21 is connected to the overcurrent detection input terminal ITRIIP, and the second input terminal of the overcurrent detection unit 21 is connected to the reference terminal, to output an overcurrent signal when the detection voltage V0 is greater than the reference voltage Vref provided by the reference terminal, and to output a non-overcurrent signal when the detection voltage V0 is less than the reference voltage Vref.

[0056] Specifically, the current detection module 30 is used to detect and output the operating current of the power module 10. For example, the current detection module 30 can sample the operating current of the power module 10 through a sampling resistor connected in series between the second terminal of the lower bridge switch and the ground terminal, and output the voltage across the resistor as the detection voltage V0. The sampling resistor can be arranged in series with the second terminal of the lower bridge switch of each phase bridge arm, or it can be connected in series between the connection node formed by connecting the second terminals of the lower bridge switches of multiple phase bridge arms and the ground. There is no specific limitation.

[0057] like Figure 6 As shown, the overcurrent detection unit 21 is constructed using a comparator. The detected voltage V0 is input to the first input terminal of the overcurrent detection unit 21 within the driver chip 20 through the overcurrent detection input terminal ITRIP. The overcurrent detection unit 21 compares the detected voltage V0 with the reference voltage Vref received at the second input terminal, and determines whether an overcurrent fault has occurred based on the voltage comparison. If the detected voltage V0 is greater than the reference voltage Vref, an overcurrent is considered to have occurred, and the overcurrent detection unit 21 outputs an overcurrent signal, allowing the driver chip 20 to perform protection actions based on the overcurrent signal. If the detected voltage V0 is less than the reference voltage Vref, no overcurrent is considered to have occurred, and the overcurrent detection unit 21 outputs a non-overcurrent signal, allowing the driver chip 20 to continue normal operation based on the non-overcurrent signal.

[0058] In one embodiment of this utility model, the current detection module 30 includes: a sampling resistor R1, one end of which is connected to the second end of the lower bridge switch transistor, and the other end of which is connected to the logic ground VSS of the driver chip 20; an operational amplifier OA, the input terminal of which is connected to both ends of the sampling resistor R1, and the output terminal of which is connected to the overcurrent detection input terminal ITRIP.

[0059] Specifically, continuing with the example of power module 10 comprising three bridge arms, the lower-side switch of the first bridge arm is LMO1, the lower-side switch of the second bridge arm is LMO2, and the lower-side switch of the third bridge arm is LMO3. The second terminals of the lower-side switches LMO1, LMO2, and LMO3 are connected and then connected to one end of the sampling resistor R1. The other end of the sampling resistor R1 is connected to the logic ground VSS of the driver chip 20. The input terminals of operational amplifier OA are connected to both ends of the sampling resistor R1. When the operating current of power module 10 is not overcurrent, the current flowing through the sampling resistor R1 is within a safe range, and the detection voltage V0 output by operational amplifier OA is less than the reference voltage Vref. When the operating current of power module 10 is overcurrent, the current flowing through the sampling resistor R1 increases beyond the safe range, and the detection voltage V0 output by operational amplifier OA increases, exceeding the reference voltage Vref.

[0060] Therefore, the overcurrent detection unit 21 can determine whether the power module 10 has experienced an overcurrent based on the voltage relationship between the detection voltage V0 and the reference voltage Vref. The reference voltage Vref can be set according to the circuit design and operating current requirements of the overcurrent detection unit 21.

[0061] In one embodiment of this utility model, the controller 100 further includes: a delay circuit 40, which is connected to the power supply terminal VCC and the fault clearing delay input terminal RCIN of the driver chip 20 respectively; the driver chip 20 also integrates a control unit 22, which is connected to the output terminal of the overcurrent detection unit 21, the fault clearing delay input terminal RCIN, and the fault signal output terminal of the driver chip 20 respectively. Connected to control the fault signal output terminal based on the overcurrent signal. The system outputs an overcurrent fault signal and controls the delay circuit 40 to discharge. It also controls the delay circuit 40 to perform a delay based on a non-overcurrent signal, and controls the fault signal output terminal after the delay circuit 40 finishes its delay. Output overcurrent fault recovery signal.

[0062] Specifically, the overcurrent signal and the non-overcurrent signal can be high or low level signals. For example, if the overcurrent signal is a high level signal and the non-overcurrent signal is a low level signal, then when the detected voltage V0 is greater than the reference voltage Vref, the overcurrent detection unit 21 outputs a high level overcurrent signal, and the control unit 22 controls the fault signal output terminal based on the high level overcurrent signal. An overcurrent fault signal is output so that the main control chip 50 can perform corresponding protection actions based on the overcurrent fault signal. Simultaneously, the control unit 22 controls the delay circuit 40 to discharge via the fault clearing delay input terminal RCIN. If the overcurrent fault in the power module 10 is cleared, the detection voltage V0 drops below the reference voltage Vref, and the overcurrent detection unit 21 outputs a low-level non-overcurrent signal. Based on the low-level non-overcurrent signal, the control unit 22 controls the delay circuit 40 to perform a charging delay, and after the delay ends, controls the fault signal output terminal... Output an overcurrent fault recovery signal so that the main control chip 50 can continue to perform control work based on the overcurrent fault recovery signal.

[0063] This embodiment adjusts the fault clearing delay time TFLTCLR through the delay circuit 40, so that the driver chip 20 controls the fault signal output terminal after the overcurrent fault clearing time of the power module 10 reaches TFLTCLR. Outputs an overcurrent fault recovery signal. The delay time TFLTCLR can be set based on actual conditions.

[0064] In one embodiment of this utility model, the delay circuit 40 includes: a delay resistor R2, one end of which is connected to the power supply terminal VCC of the driver chip 20; and a delay capacitor C2, one end of which is connected to the other end of the delay resistor R1 and the fault clear delay input terminal RCIN, and the other end of the delay capacitor C2 is connected to the logic ground VSS of the driver chip 20.

[0065] In other words, after the power supply terminal VCC of the driver chip 20 is powered on, the delay capacitor C2 is charged through the delay resistor R2, and the current state is maintained after the charging is completed.

[0066] When the detection voltage V0 output by the current detection module 30 is greater than the reference voltage Vref, the overcurrent detection unit 21 outputs an overcurrent signal. The control unit 22, based on the overcurrent signal, grounds the fault clearing delay input RCIN. At this time, the delay capacitor C2 discharges until the discharge is complete. When the overcurrent fault in the power module 10 is cleared, the detection voltage V0 drops below the reference voltage Vref, and the overcurrent detection unit 21 outputs a non-overcurrent signal. The control unit 22, based on the non-overcurrent signal, disconnects the fault clearing delay input RCIN from ground. At this time, the power supply terminal VCC of the driver chip 20 charges the delay capacitor C2 through the delay resistor R2. After charging is complete, the delay is determined to end, and the fault signal output terminal is controlled. Output overcurrent fault recovery signal.

[0067] The delay time TFLTCLR in this embodiment can be adjusted by changing the values ​​of the delay resistor R2 and the delay capacitor C2. The delay time TFLTCLR is approximately equal to R2*C1.

[0068] In one embodiment of this utility model, the control unit 22 includes: a first switch Q1, the control terminal of which is connected to the output terminal of the overcurrent detection unit 21, the first terminal of which is connected to the fault clearing delay input terminal RCIN, and the second terminal of which is grounded; a logic gate 221, the first input terminal of which is connected to the output terminal of the overcurrent detection unit 21, and the second input terminal of which is connected to the first terminal of the first switch Q1 and the fault clearing delay input terminal RCIN; and a second switch Q2, the control terminal of which is connected to the output terminal of the logic gate 221, and the first terminal of which is connected to the fault signal output terminal. Connected, the second terminal of the second switch Q2 is grounded.

[0069] Specifically, logic gate 221 can be constructed based on existing electronic components. Figure 6 For example, logic gate 221 includes a Schmitt trigger and a latch. The first switch Q1 and the second switch Q2 can also be used for switching applications based on actual conditions.

[0070] When the detected voltage V0 is greater than the reference voltage Vref, the overcurrent detection unit 21 outputs a high-level overcurrent signal. The first switch Q1 is turned on under high-level control, the fault clearing delay input terminal RCIN is grounded, and the delay capacitor C2 begins to discharge. At the same time, the high-level overcurrent signal is input to the latch through the noise filter, and a high level is output through the latch's output terminal Q to drive the second switch Q2 to turn on. The fault signal output terminal... Grounding, fault signal output terminal Output a low-level overcurrent fault signal.

[0071] When the detected voltage V0 is less than the reference voltage Vref, the overcurrent detection unit 21 outputs a low-level non-overcurrent signal. The first switch Q1 is turned off under the low-level action, the fault clearing delay input RCIN is grounded, and the delay capacitor C2 begins charging. After charging is complete, the voltage at the fault clearing delay input RCIN reaches a high level. Simultaneously, the low-level non-overcurrent signal is input to the latch through a noise filter. The latch outputs a low level at its output Q, driving the second switch Q2 to turn off, and the fault signal output... Output overcurrent recovery fault signal.

[0072] In one embodiment of this utility model, a filter capacitor C3 is connected in series between the power supply terminal VCC of the driver chip 20 and the logic ground of the driver chip 20, so as to filter VCC through the filter capacitor C3.

[0073] In addition to the above technical solutions, the controller 100 may also have functions such as undervoltage detection, self-recovery after fault clearance, and enabling. For example, an overvoltage sampling module can be added to the controller 100 to detect the input voltage of HV_BUS and input the voltage sampling value into the driver chip 20. The driver chip 20 judges the voltage based on its internal undervoltage detection unit. When the voltage sampling value is less than a preset voltage threshold, it determines that undervoltage has occurred and executes the corresponding undervoltage protection control; when the voltage sampling value is greater than the preset voltage threshold, it determines that the power supply is normal. And after the undervoltage fault is cleared, it realizes delayed self-recovery based on delay control.

[0074] In addition, the output of the driver chip 20 includes, but is not limited to, negative voltage, clamping, etc., which can be limited according to the actual situation.

[0075] In summary, according to the controller of this utility model, the power module integrates multiple bridge arms, each including an upper bridge switch and a lower bridge switch. The driver chip is set independently of the power module, and the upper bridge drive output terminal of the driver chip is connected to the control terminal of the upper bridge switch, while the lower bridge drive output terminal of the driver chip is connected to the control terminal of the lower bridge switch. The driver chip drives the upper and lower bridge switches to turn on or off based on control signals. Therefore, this controller integrates the switches and driver chip separately, improving the space utilization of the PCB board, reducing the difficulty of circuit installation and design, and providing better heat dissipation and higher operational reliability.

[0076] Corresponding to the above embodiments, this utility model also proposes a compressor.

[0077] like Figure 7 As shown, the compressor 300 of this utility model includes the controller 100 described above.

[0078] The compressor according to the present invention, based on the above-described controller, reduces the design and installation difficulty and improves the operational reliability of the compressor.

[0079] Corresponding to the above embodiments, this utility model also proposes a vehicle.

[0080] like Figure 8 As shown, the vehicle 1000 of this utility model includes the controller 100 described above, or as... Figure 9 As shown, the vehicle 1000 of this utility model includes the compressor 300 described above.

[0081] Vehicle 1000 can be a new energy vehicle. In some embodiments, the new energy vehicle can be a pure electric vehicle with an electric motor as the main driving force. In other embodiments, the new energy vehicle can also be a hybrid vehicle with both an internal combustion engine and an electric motor as the main driving force. Regarding the internal combustion engine and electric motor mentioned in the above embodiments that provide driving power for the new energy vehicle, the internal combustion engine can use gasoline, diesel, hydrogen, etc. as fuel, and the way to provide electrical energy to the electric motor can be a power battery, hydrogen fuel cell, etc., without special limitation. It should be noted that this is merely an exemplary description of the structure of new energy vehicles, etc., and is not intended to limit the protection scope of this utility model.

[0082] The vehicle according to this utility model, based on the aforementioned controller or compressor, reduces design and installation difficulty and improves vehicle operational reliability.

[0083] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0084] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0085] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0086] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A controller, characterized in that, include: A power module, which integrates multiple bridge arms, each bridge arm including an upper bridge switch and a lower bridge switch; A driver chip is provided independently of the power module. The upper bridge driver output terminal of the driver chip is connected to the control terminal of the upper bridge switch, and the lower bridge driver output terminal of the driver chip is connected to the control terminal of the lower bridge switch, so as to drive the upper bridge switch and the lower bridge switch to be turned on or off based on the control signal.

2. The controller according to claim 1, characterized in that, The upper bridge switch and the lower bridge switch are one or more of HEMT, MOSFET and IGBT, respectively. When the switching transistor is the HEMT, the control terminal of the switching transistor is connected to the corresponding drive output terminal of the driver chip through a filter inductor; When the switching transistor is the MOSFET, the control terminal of the switching transistor is connected to the corresponding drive output terminal of the drive chip through a drive resistor; When the switching transistor is the IGBT, the control terminal of the switching transistor is connected to the corresponding drive output terminal of the drive chip through a drive resistor, and the switching transistor is connected in parallel with a freewheeling diode.

3. The controller according to claim 2, characterized in that, The first terminal of the upper bridge switch is connected to the high-voltage input terminal, the second terminal of the upper bridge switch is connected to the first terminal of the lower bridge switch, and the second terminal of the lower bridge switch is connected to the low-voltage drive return terminal of the driver chip; wherein... When the switching transistor is the HEMT, a filter capacitor is connected in series between the first terminal of the upper bridge switching transistor and the second terminal of the lower bridge switching transistor.

4. The controller according to claim 3, characterized in that, The second terminal of the upper bridge switch and the first terminal of the lower bridge switch are connected to the negative terminal of the upper bridge floating power supply of the driver chip. A bootstrap capacitor is connected in series between the negative terminal of the upper bridge floating power supply and the positive terminal of the upper bridge floating power supply of the driver chip. A bootstrap diode is connected in series between the positive terminal of the upper bridge floating power supply and the power supply terminal of the driver chip, and the anode of the bootstrap diode is connected to the power supply terminal of the driver chip.

5. The controller according to claim 3, characterized in that, Also includes: A current detection module is connected to the second terminal of the lower bridge switch and the overcurrent detection input terminal of the driver chip, respectively, to detect the operating current of the power module and output a corresponding detection voltage. The driver chip integrates an overcurrent detection unit. The first input terminal of the overcurrent detection unit is connected to the overcurrent detection input terminal, and the second input terminal of the overcurrent detection unit is connected to the reference terminal. It is used to output an overcurrent signal when the detected voltage is greater than the reference voltage provided by the reference terminal, and to output a non-overcurrent signal when the detected voltage is less than the reference voltage.

6. The controller according to claim 5, characterized in that, Also includes: The delay circuit is connected to the power supply terminal and the fault clearing delay input terminal of the driver chip, respectively. The driver chip also integrates a control unit, which is connected to the output terminal of the overcurrent detection unit, the fault clearing delay input terminal, and the fault signal output terminal of the driver chip, respectively. The control unit is used to control the fault signal output terminal to output an overcurrent fault signal and control the delay circuit to discharge based on the overcurrent signal, and to control the delay circuit to perform a delay based on the non-overcurrent signal, and to control the fault signal output terminal to output an overcurrent fault recovery signal after the delay circuit finishes its delay.

7. The controller according to claim 6, characterized in that, The delay circuit includes: A delay resistor, one end of which is connected to the power supply terminal of the driver chip; A delay capacitor, one end of which is connected to the other end of the delay resistor and the fault clearing delay input terminal, and the other end of which is connected to the logic ground of the driver chip.

8. The controller according to claim 6, characterized in that, The control unit includes: The first switching transistor has its control terminal connected to the output terminal of the overcurrent detection unit, its first terminal connected to the fault clearing delay input terminal, and its second terminal grounded. The logic gate has its first input terminal connected to the output terminal of the overcurrent detection unit, and its second input terminal connected to the first terminal of the first switching transistor and the fault clearing delay input terminal, respectively. The second switch has its control terminal connected to the output terminal of the logic gate, its first terminal connected to the fault signal output terminal, and its second terminal grounded.

9. The controller according to claim 5, characterized in that, The overcurrent detection unit includes: A sampling resistor, one end of which is connected to the second terminal of the lower bridge switch transistor, and the other end of which is connected to the logic ground of the driver chip; An operational amplifier, wherein the input terminal of the operational amplifier is connected to both ends of the sampling resistor, and the output terminal of the operational amplifier is connected to the overcurrent detection input terminal.

10. The controller according to claim 4, characterized in that, A filter capacitor is connected in series between the power supply terminal of the driver chip and the logic ground of the driver chip.

11. The controller according to claim 1, characterized in that, Also includes: The main control chip is connected to the driver chip and is used to output the control signal.

12. A compressor, characterized in that, Includes the controller according to any one of claims 1-11.

13. A vehicle, characterized in that, Includes the controller according to any one of claims 1-11, or the compressor according to claim 12.

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