Intelligent power module driving IC circuit, intelligent power module and air conditioner

Abstract

The present invention discloses a driving IC circuit of an intelligent power module, an intelligent power module and an air conditioner. The driving IC circuit of the intelligent power module includes a logic input buffer circuit, a first upper bridge driving circuit, a second upper bridge driving circuit, a first lower bridge driving circuit, a second lower bridge driving circuit and a PFC driving circuit; the first upper bridge driving circuit is used to drive the operation of the upper bridge arm switch tube corresponding to the external first motor; the first lower bridge driving circuit is used to drive the operation of the lower bridge arm switch tube corresponding to the external first motor; the second upper bridge driving circuit is used to drive the operation of the upper bridge arm switch tube corresponding to the external second motor; the second lower bridge driving circuit is used to drive the operation of the lower bridge arm switch tube corresponding to the external second motor; and the PFC driving circuit is used to drive the operation of the external PFC switch tube. The present invention improves the integration of the intelligent power module.

Description

Technical Field

[0001] The present invention relates to the field of intelligent power modules, and in particular to a driving IC circuit of an intelligent power module, an intelligent power module and an air conditioner. Background Art

[0002] Intelligent Power Module, or IPM (Intelligent Power Module), is a power drive product that combines power electronics and integrated circuit technology. The intelligent power module integrates power switching devices and high-voltage drive circuits, and has built-in fault detection circuits such as overvoltage, overcurrent and overheating. On the one hand, the intelligent power module receives the control signal of the MCU to drive the subsequent circuit to work, and on the other hand, it sends the system status detection signal back to the MCU. Compared with traditional discrete solutions, the intelligent power module has won an increasingly large market with its advantages such as high integration and high reliability. It is especially suitable for frequency converters and various inverter power supplies that drive motors. It is an ideal power electronic device for variable frequency speed regulation, metallurgical machinery, electric traction, servo drive and variable frequency home appliances.

[0003] IPM is widely used in air conditioners. The current variable frequency air conditioner includes a fan, a compressor and a PFC module. The existing variable frequency air conditioner is usually driven by three separate IPMs, which leads to high cost and low reliability of the electric control operation of the variable frequency air conditioner, and the wiring difficulty of the circuit system is also relatively large. With the continuous increase in the use of variable frequency air conditioners, the number of cases of variable frequency air conditioner failure has also increased. In the prior art, the reason for the failure of variable frequency air conditioners is usually due to a fault in its drive system; coupled with the higher price of variable frequency air conditioners compared to fixed frequency air conditioners, how to reduce the manufacturing cost of the drive system of variable frequency air conditioners has become an important research topic. High integration, miniaturization and cost reduction are the future development trends of variable frequency air conditioner IPM. Integrating multiple parts of the control chip MCU, rectifier bridge, partially active PFC, compressor IPM and fan IPM on the variable frequency board of the traditional variable frequency air conditioner into one module is a highly integrated IPM. However, the existing high-integration IPM of variable frequency air conditioners simply integrates the fan drive circuit and the compressor drive circuit together. Its internal structure is similar to the simple superposition of the fan drive circuit and the compressor drive circuit, and it does not achieve true high integration and miniaturization. Therefore, how to further optimize the high-integration IPM of the air conditioner is an urgent problem to be solved. Summary of the invention

[0004] The main purpose of the present invention is to provide a driving IC circuit of an intelligent power module, aiming to further improve the integration of the intelligent power module, so as to reduce the cost of the intelligent power module and improve the reliability of the intelligent power module.

[0005] In order to achieve the above object, the present invention provides a driving IC circuit of an intelligent power module, the driving IC circuit includes an upper bridge control signal input terminal, a lower bridge control signal input terminal, a PFC control signal input terminal, a logic input buffer circuit, a first upper bridge driving circuit, a second upper bridge driving circuit, a first lower bridge driving circuit, a second lower bridge driving circuit and a PFC driving circuit; wherein:

[0006] The logic input buffer circuit is used to perform rectification and filtering processing on the control signals input from the upper bridge control signal input terminal, the lower bridge control signal input terminal and the PFC control signal input terminal, and output the control signals after rectification and filtering processing to the first upper bridge driving circuit, the second upper bridge driving circuit, the first lower bridge driving circuit, the second lower bridge driving circuit and the PFC driving circuit accordingly;

[0007] The first upper bridge driving circuit is used to drive the operation of the upper bridge arm switch tube corresponding to the external first motor according to the control signal output by the logic input buffer circuit;

[0008] The first lower bridge driving circuit is used to drive the operation of the lower bridge arm switch tube corresponding to the external first motor according to the control signal output by the logic input buffer circuit;

[0009] The second upper bridge driving circuit is used to drive the operation of the upper bridge arm switch tube corresponding to the external second motor according to the control signal output by the logic input buffer circuit;

[0010] The second lower bridge driving circuit is used to drive the operation of the lower bridge arm switch tube corresponding to the external second motor according to the control signal output by the logic input buffer circuit;

[0011] The PFC driving circuit is used to drive the operation of an external PFC switch tube according to the control signal output by the logic input buffer circuit.

[0012] Preferably, the driving IC circuit further includes an enable terminal, an error signal output terminal, a protection circuit, an error judgment logic circuit and a driving logic circuit; wherein:

[0013] The protection circuit is used to output a first undervoltage protection signal to the error judgment logic circuit when undervoltage occurs at the input end of the low-voltage side power supply of the driver IC circuit, output an overcurrent protection signal to the error judgment logic circuit when overcurrent occurs in any of the switch tubes, and output an overtemperature protection signal to the error judgment logic circuit when overtemperature occurs in the intelligent power module;

[0014] The error judgment logic circuit is used to output an error signal to the error signal output terminal when receiving the first undervoltage protection signal, the overcurrent protection signal or / and the overtemperature protection signal;

[0015] The driving logic circuit is used to output a start signal to the logic input buffer circuit when the error judgment logic circuit does not output the error signal and the enable end inputs an enable signal, so as to control the first upper bridge driving circuit, the second upper bridge driving circuit, the first lower bridge driving circuit, the second lower bridge driving circuit and the PFC driving circuit to start working.

[0016] Preferably, the protection circuit includes a low-voltage side undervoltage protection circuit, an overcurrent protection circuit and an overtemperature protection circuit; wherein:

[0017] The low-voltage side undervoltage protection circuit is used to output a first undervoltage protection signal to the error judgment logic circuit when an undervoltage occurs at the low-voltage side power supply input terminal of the driver IC circuit;

[0018] The overcurrent protection circuit is used to output an overcurrent protection signal to the error judgment logic circuit when an overcurrent occurs in any of the switch tubes;

[0019] The over-temperature protection circuit is used to output an over-temperature protection signal to the error judgment logic circuit when the intelligent power module is over-heated.

[0020] Preferably, the driver IC circuit further includes:

[0021] The high-voltage side undervoltage protection circuit is used to output a second undervoltage protection signal to the logic input buffer circuit when undervoltage occurs at the high-voltage side power supply input end of the driver IC circuit, so as to control the first upper bridge drive circuit, the second upper bridge drive circuit, the first lower bridge drive circuit, the second lower bridge drive circuit and the PFC drive circuit to stop working.

[0022] In addition, to achieve the above-mentioned purpose, the present invention further provides an intelligent power module, which includes a PFC switch tube, a plurality of resistors, a first upper bridge arm switch tube corresponding to an external first motor, a second upper bridge arm switch tube, a third upper bridge arm switch tube, a first lower bridge arm switch tube, a second lower bridge arm switch tube and a third lower bridge arm switch tube, a fourth upper bridge arm switch tube corresponding to an external second motor, a fifth upper bridge arm switch tube, a sixth upper bridge arm switch tube, a fourth lower bridge arm switch tube, a fifth lower bridge arm switch tube and a sixth lower bridge arm switch tube, and a driving IC circuit of the intelligent power module as described above; wherein:

[0023] The first output end of the first upper bridge driving circuit in the driving IC circuit is connected to the control end of the first upper bridge arm switch tube via the resistor, the second output end of the first upper bridge driving circuit is connected to the control end of the second upper bridge arm switch tube via the resistor, and the third output end of the first upper bridge driving circuit is connected to the control end of the third upper bridge arm switch tube via the resistor; the first output end of the first lower bridge driving circuit in the driving IC circuit is connected to the control end of the first lower bridge arm switch tube via the resistor, the second output end of the first lower bridge driving circuit is connected to the control end of the second lower bridge arm switch tube via the resistor, and the third output end of the first lower bridge driving circuit is connected to the control end of the third lower bridge arm switch tube via the resistor;

[0024] The first output end of the second upper bridge driving circuit in the driving IC circuit is connected to the control end of the fourth upper bridge arm switch tube via the resistor, the second output end of the second upper bridge driving circuit is connected to the control end of the fifth upper bridge arm switch tube via the resistor, and the third output end of the second upper bridge driving circuit is connected to the control end of the sixth upper bridge arm switch tube via the resistor; the first output end of the second lower bridge driving circuit in the driving IC circuit is connected to the control end of the fourth lower bridge arm switch tube via the resistor, the second output end of the second lower bridge driving circuit is connected to the control end of the fifth lower bridge arm switch tube via the resistor, and the third output end of the second lower bridge driving circuit is connected to the control end of the sixth lower bridge arm switch tube via the resistor;

[0025] The output end of the PFC driving circuit in the driving IC circuit is connected to the control end of the PFC switch tube via the resistor.

[0026] Preferably, the intelligent power module further includes a first current sampling resistor, a second current sampling resistor and a third current sampling resistor; wherein:

[0027] The first end of the first current sampling resistor is connected to the current output end of the PFC switch tube, the first end of the second current sampling resistor is respectively connected to the current output ends of the first lower bridge arm switch tube, the second lower bridge arm switch tube and the third lower bridge arm switch tube, the first end of the third current sampling resistor is respectively connected to the current output ends of the fourth lower bridge arm switch tube, the fifth lower bridge arm switch tube and the sixth lower bridge arm switch tube, the second end of the first current sampling resistor, the second end of the second current sampling resistor and the second end of the third current sampling resistor are grounded; the first end of the first current sampling resistor is also connected to the first input end of the overcurrent protection circuit in the drive IC circuit, the first end of the second current sampling resistor is also connected to the second input end of the overcurrent protection circuit in the drive IC circuit, and the first end of the third current sampling resistor is also connected to the third input end of the overcurrent protection circuit in the drive IC circuit.

[0028] Preferably, the intelligent power module further comprises a temperature detection circuit for detecting the temperature of the intelligent power module, and the temperature detection circuit is connected to the input end of the over-temperature protection circuit in the driving IC circuit.

[0029] Preferably, the PFC switch tube, the first upper bridge arm switch tube, the second upper bridge arm switch tube, the third upper bridge arm switch tube, the first lower bridge arm switch tube, the second lower bridge arm switch tube, the third lower bridge arm switch tube, the fourth upper bridge arm switch tube, the fifth upper bridge arm switch tube, the sixth upper bridge arm switch tube, the fourth lower bridge arm switch tube, the fifth lower bridge arm switch tube and the sixth lower bridge arm switch tube are IGBT tubes.

[0030] Preferably, the intelligent power module further includes a first high-voltage area power supply input terminal, a second high-voltage area power supply input terminal, a plurality of freewheeling diodes, a PFC signal output terminal and a first diode; wherein:

[0031] The collector of the first upper arm switch tube, the collector of the second upper arm switch tube, the collector of the third upper arm switch tube, the collector of the fourth upper arm switch tube, the collector of the fifth upper arm switch tube, and the collector of the sixth upper arm switch tube are connected to the first high-voltage area power supply input terminal, the emitter of the first upper arm switch tube is connected to the collector of the first lower arm switch tube, the emitter of the second upper arm switch tube is connected to the collector of the second lower arm switch tube, the emitter of the third upper arm switch tube is connected to the collector of the third lower arm switch tube, the emitter of the fourth upper arm switch tube is connected to the collector of the fourth lower arm switch tube, the emitter of the fifth upper arm switch tube is connected to the collector of the fifth lower arm switch tube, and the sixth upper arm switch tube The emitter of the first lower bridge arm switch tube is connected to the collector of the sixth lower bridge arm switch tube; the emitter of the first lower bridge arm switch tube, the emitter of the second lower bridge arm switch tube and the emitter of the third lower bridge arm switch tube are connected to the first end of the second current sampling resistor, and the emitter of the fourth lower bridge arm switch tube, the emitter of the fifth lower bridge arm switch tube and the emitter of the sixth lower bridge arm switch tube are connected to the first end of the third current sampling resistor; the collector of the PFC switch tube is respectively connected to the PFC signal output end and the anode of the first diode, the cathode of the first diode is connected to the second high-voltage area power supply input end, and the emitter of the PFC switch tube is connected to the first end of the first current sampling resistor; a freewheeling diode is connected between the collector and emitter of each switch tube;

[0032] A connection node between the first upper bridge arm switch tube and the first lower bridge arm switch tube, a connection node between the second upper bridge arm switch tube and the second lower bridge arm switch tube, and a connection node between the third upper bridge arm switch tube and the third lower bridge arm switch tube are connected to an external first motor, and a connection node between the fourth upper bridge arm switch tube and the fourth lower bridge arm switch tube, a connection node between the fifth upper bridge arm switch tube and the fifth lower bridge arm switch tube, and a connection node between the sixth upper bridge arm switch tube and the sixth lower bridge arm switch tube are connected to an external second motor.

[0033] In addition, to achieve the above-mentioned purpose, the present invention also provides an air conditioner, which includes the intelligent power module as described above.

[0034] The driving IC circuit of the intelligent power module of the present invention integrates the first upper bridge driving circuit for driving the upper bridge arm switch tube corresponding to the external first motor, the first lower bridge driving circuit for driving the lower bridge arm switch tube corresponding to the external first motor, the second upper bridge driving circuit for driving the upper bridge arm switch tube corresponding to the external second motor, the second lower bridge driving circuit for driving the lower bridge arm switch tube corresponding to the external second motor, and the PFC driving circuit into the same IC chip, so that the driving IC circuit of the intelligent power module of the present invention further improves the integration of the intelligent power module compared with the driving IC circuit of the intelligent power module in the prior art, thereby reducing the cost of the intelligent power module and also improving the reliability of the intelligent power module. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0036] Figure 1 It is a structural schematic diagram of an embodiment of a driver IC circuit of an intelligent power module of the present invention;

[0037] Figure 2 FIG. 1 is a schematic diagram of the structure of an intelligent power module according to an embodiment of the present invention.

[0038] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0039] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0040] The present invention provides a driving IC circuit 100 of an intelligent power module, which is used to further improve the integration of the intelligent power module, so as to reduce the cost of the intelligent power module and improve the reliability of the intelligent power module.

[0041] Figure 1 FIG. 1 is a schematic diagram of a driving IC circuit of an embodiment of an intelligent power module of the present invention, referring to FIG. Figure 1In this embodiment, the driver IC circuit 100 of the intelligent power module includes a first upper bridge control signal input terminal HIN1, a second upper bridge control signal input terminal HIN2, a third upper bridge control signal input terminal HIN3, a fourth upper bridge control signal input terminal HIN4, a fifth upper bridge control signal input terminal HIN5, a sixth upper bridge control signal input terminal HIN6, a first lower bridge control signal input terminal LIN1, a second lower bridge control signal input terminal LIN2, a third lower bridge control signal input terminal LIN3, a fourth lower bridge control signal input terminal LIN4, a fifth lower bridge control signal input terminal LIN5, a sixth lower bridge control signal input terminal LIN6, a PFC control signal input terminal PFCIN, a logic input buffer circuit 101, a first upper bridge driving circuit 102, a first lower bridge driving circuit 103, a second upper bridge driving circuit 104, a second lower bridge driving circuit 105 and a PFC driving circuit 106.

[0042] The logic input buffer circuit 101 is used to perform wave rectification and filtering on the control signals inputted from the first upper bridge control signal input terminal HIN1, the second upper bridge control signal input terminal HIN2 and the third upper bridge control signal input terminal HIN3, and output the control signals after wave rectification and filtering to the first upper bridge driving circuit 102; the logic input buffer circuit 101 performs wave rectification and filtering on the control signals inputted from the first lower bridge control signal input terminal LIN1, the second lower bridge control signal input terminal LIN2 and the third lower bridge control signal input terminal LIN3, and output the control signals after wave rectification and filtering to the first lower bridge driving circuit 103; the logic input buffer circuit 101 performs wave rectification and filtering on the control signals inputted from the fourth upper bridge control signal input terminal HIN4, the fifth upper bridge control signal input terminal HIN5 and the fifth upper bridge control signal input terminal HIN6. The logic input buffer circuit 101 performs rectification and filtering on the control signals inputted from the fourth lower bridge control signal input terminal LIN4, the fifth lower bridge control signal input terminal LIN5 and the sixth lower bridge control signal input terminal LIN6, and outputs the rectification and filtering control signals to the second upper bridge driving circuit 104; the logic input buffer circuit 101 performs rectification and filtering on the control signals inputted from the fourth lower bridge control signal input terminal LIN4, the fifth lower bridge control signal input terminal LIN5 and the sixth lower bridge control signal input terminal LIN6, and outputs the rectification and filtering control signals to the second lower bridge driving circuit 105; the logic input buffer circuit 101 performs rectification and filtering on the control signals inputted from the PFC control signal input terminal PFCIN, and outputs the rectification and filtering control signals to the PFC driving circuit 106;

[0043] The first upper bridge driving circuit 102 is used to drive the upper bridge arm switch tube (not shown) corresponding to the external first motor (not shown) according to the control signal output by the logic input buffer circuit 101. It should be noted that the upper bridge arm switch tube corresponding to the external first motor includes 3 switch tubes, so the output end of the first upper bridge driving circuit 102 includes a first output end HO1, a second output end HO2 and a third output end HO3;

[0044] The first lower bridge driving circuit 103 is used to drive the lower bridge arm switch tube (not shown) corresponding to the external first motor according to the control signal output by the logic input buffer circuit 101. It should be noted that the lower bridge arm switch tube corresponding to the external first motor also includes 3 switch tubes, so the output end of the first lower bridge driving circuit 103 includes a first output end LO1, a second output end LO2 and a third output end LO3;

[0045] The second upper bridge driving circuit 104 is used to drive the upper bridge arm switch tube (not shown) corresponding to the external second motor (not shown) according to the control signal output by the logic input buffer circuit 101. It should be noted that the upper bridge arm switch tube corresponding to the external second motor includes three switch tubes, so the output end of the second upper bridge driving circuit 104 includes a first output end HO4, a second output end HO5 and a third output end HO6;

[0046] The second lower bridge driving circuit 105 is used to drive the lower bridge arm switch tube (not shown) corresponding to the external second motor to work according to the control signal output by the logic input buffer circuit 101. It should be noted that the lower bridge arm switch tube corresponding to the external second motor also includes 3 switch tubes, so the output end of the second lower bridge driving circuit 105 includes a first output end LO4, a second output end LO5 and a third output end LO6;

[0047] The PFC driving circuit 106 is used to drive the operation of an external PFC switch tube (not shown) according to the control signal output by the logic input buffer circuit 101 , and the output end of the PFC driving circuit 106 is PFCO.

[0048] Furthermore, the driver IC circuit 100 of the intelligent power module of this embodiment further includes an enable terminal EN, an error signal output terminal FAULT, a reset terminal RS, a protection circuit 107, an error judgment logic circuit 108 and a drive logic circuit 109. The driver IC circuit 100 is reset when a reset signal is input to the reset terminal RS.

[0049] Specifically, the protection circuit 107 is used to output a first undervoltage protection signal to the error judgment logic circuit 108 when the low-voltage side power supply input terminal VDD (i.e., the driving voltage input port) of the driver IC circuit 100 of the intelligent power module of this embodiment is undervoltage, output an overcurrent protection signal to the error judgment logic circuit 108 when any of the above-mentioned switch tubes has an overcurrent, and output an overtemperature protection signal to the error judgment logic circuit 108 when the intelligent power module is overheated;

[0050] The error judgment logic circuit 108 is used to output an error signal to the error signal output terminal FUALT when receiving the first undervoltage protection signal, the overcurrent protection signal or / and the overtemperature protection signal;

[0051] The driving logic circuit 109 is used to output a start signal to the logic input buffer circuit 101 when the error judgment logic circuit 108 does not output the error signal and the enable terminal EN inputs an enable signal, so as to control the first upper bridge driving circuit 102, the first lower bridge driving circuit 103, the second upper bridge driving circuit 104, the second lower bridge driving circuit 105 and the PFC driving circuit 106 to start working.

[0052] Furthermore, in this embodiment, the protection circuit 107 includes a low-voltage side undervoltage protection circuit 1071 , an overcurrent protection circuit 1072 , and an overtemperature protection circuit 1073 .

[0053] The low-voltage side undervoltage protection circuit 1071 is used to output a first undervoltage protection signal to the error judgment logic circuit 108 when the low-voltage side power supply input terminal VDD of the driver IC circuit 100 of the intelligent power module of this embodiment is undervoltage;

[0054] The overcurrent protection circuit 1072 is used to output an overcurrent protection signal to the error judgment logic circuit 108 when any of the above-mentioned switch tubes has an overcurrent;

[0055] The over-temperature protection circuit 1073 is used to output an over-temperature protection signal to the error judgment logic circuit 108 when the intelligent power module is over-heated.

[0056] Furthermore, the driver IC circuit 100 of the intelligent power module of the present embodiment also includes a high-voltage side undervoltage protection circuit 110, which is used to output a second undervoltage protection signal to the logic input buffer circuit 101 when undervoltage occurs at the high-voltage side power supply input terminal (not shown) of the driver IC circuit 100 of the intelligent power module of the present embodiment, so as to control the first upper bridge drive circuit 102, the first lower bridge drive circuit 103, the second upper bridge drive circuit 104, the second lower bridge drive circuit 105 and the PFC drive circuit 106 to stop working.

[0057] The driver IC circuit 100 of the intelligent power module of this embodiment integrates the first upper bridge driving circuit 102 for driving the upper bridge arm switch tube corresponding to the external first motor, the first lower bridge driving circuit 103 for driving the lower bridge arm switch tube corresponding to the external first motor, the second upper bridge driving circuit 104 for driving the upper bridge arm switch tube corresponding to the external second motor, the second lower bridge driving circuit 105 for driving the lower bridge arm switch tube corresponding to the external second motor, and the PFC driving circuit 106 into the same IC chip, so that the driver IC circuit 100 of the intelligent power module of this embodiment further improves the integration of the intelligent power module compared with the driver IC circuit of the intelligent power module in the prior art, thereby reducing the cost of the intelligent power module and also improving the reliability of the intelligent power module.

[0058] The present invention also provides an intelligent power module. Figure 2 FIG. 1 is a schematic diagram of a structure of an embodiment of an intelligent power module of the present invention, and Figure 1 and Figure 2 The intelligent power module 200 includes a PFC switch tube Q5, a plurality of resistors (such as a resistor R1, a resistor R2, a resistor R3, a resistor R4, and a resistor R5), a first upper bridge arm switch tube Q1, a second upper bridge arm switch tube (not shown), a third upper bridge arm switch tube (not shown), a first lower bridge arm switch tube Q2, a second lower bridge arm switch tube (not shown), and a third lower bridge arm switch tube (not shown) corresponding to an external first motor M1, a fourth upper bridge arm switch tube Q3, a fifth upper bridge arm switch tube (not shown), a sixth upper bridge arm switch tube (not shown), a fourth lower bridge arm switch tube Q4, a fifth lower bridge arm switch tube (not shown), and a sixth lower bridge arm switch tube (not shown) corresponding to an external second motor, and a driving IC circuit 100 (i.e., Figure 1 The driving IC circuit 100 of the intelligent power module shown in FIG.

[0059] Specifically, in this embodiment, the first output terminal HO1 of the first upper bridge driving circuit 102 in the driving IC circuit 100 is connected to the control terminal of the first upper bridge arm switch tube Q1 via the resistor R1, and the second output terminal HO2 of the first upper bridge driving circuit 102 is connected to the control terminal of the second upper bridge arm switch tube (not shown) via a resistor (not shown) (i.e. Figure 2 The connection structure of the second upper bridge arm switch tube is not shown in the figure, and its connection structure is the same as the connection structure of the first upper bridge arm switch tube Q1), and the third output terminal HO3 of the first upper bridge driving circuit 102 is connected to the control terminal of the third upper bridge arm switch tube (not shown) through a resistor (not shown) (i.e. Figure 2 The connection structure of the third upper bridge arm switch tube is not shown, and its connection structure is the same as the connection structure of the first upper bridge arm switch tube Q1); the first output terminal LO1 of the first lower bridge drive circuit 103 in the driver IC circuit 100 is connected to the control terminal of the first lower bridge arm switch tube Q2 via a resistor R2, and the second output terminal LO2 of the first lower bridge drive circuit 103 is connected to the control terminal of the second lower bridge arm switch tube (not shown) via a resistor (not shown) (i.e. Figure 2 The connection structure of the second lower bridge arm switch tube is not shown in the figure, and its connection structure is the same as the connection structure of the first lower bridge arm switch tube Q2), and the third output terminal LO3 of the first lower bridge drive circuit 103 is connected to the control terminal of the third lower bridge arm switch tube (not shown) through a resistor (not shown) (i.e. Figure 2 The connection structure of the third lower bridge arm switch tube is not shown, and its connection structure is the same as the connection structure of the first lower bridge arm switch tube Q2);

[0060] The first output terminal HO4 of the second upper bridge driving circuit 104 in the driving IC circuit 100 is connected to the control terminal of the fourth upper bridge arm switch tube Q3 via a resistor R3, and the second output terminal HO5 of the second upper bridge driving circuit 104 is connected to the control terminal of the fifth upper bridge arm switch tube (not shown) via a resistor (not shown) (i.e. Figure 2 The connection structure of the fifth upper bridge arm switch tube is not shown, and its connection structure is the same as the connection structure of the fourth upper bridge arm switch tube Q3), the third output terminal HO6 of the second upper bridge drive circuit 104 is connected to the control terminal of the sixth upper bridge arm switch tube (not shown) via a resistor (not shown) (i.e. Figure 2The connection structure of the sixth upper bridge arm switch tube is not shown, and its connection structure is the same as the connection structure of the fourth upper bridge arm switch tube Q3); the first output terminal LO4 of the second lower bridge drive circuit 105 in the driver IC circuit 100 is connected to the control terminal of the fourth lower bridge arm switch tube Q4 via a resistor R4, and the second output terminal LO5 of the second lower bridge drive circuit 105 is connected to the control terminal of the fifth lower bridge arm switch tube (not shown) via a resistor (not shown) (i.e. Figure 2 The connection structure of the fifth lower bridge arm switch tube is not shown, and its connection structure is the same as the connection structure of the fourth lower bridge arm switch tube Q4), the third output terminal LO6 of the second lower bridge drive circuit 105 is connected to the control terminal of the sixth lower bridge arm switch tube (not shown) via a resistor (not shown) (i.e. Figure 2 The connection structure of the sixth lower bridge arm switch tube is not shown, and its connection structure is the same as the connection structure of the fourth lower bridge arm switch tube Q4); in this embodiment, the output terminal PFCO of the PFC drive circuit 106 in the drive IC circuit 100 is connected to the control terminal of the PFC switch tube Q5 through a resistor R5. In this embodiment, the low-voltage side power supply input terminal VDD of the drive IC circuit 100 provides a drive voltage for the external first motor M1, the external second motor M2 and the PFC drive circuit 106.

[0061] The intelligent power module 200 of this embodiment further includes a first current sampling resistor R6, a second current sampling resistor R7 and a third current sampling resistor R8. The first end of the first current sampling resistor R6 is connected to the current output end of the PFC switch tube Q5, and the second end of the first current sampling resistor R6 is grounded; the first end of the second current sampling resistor R7 is respectively connected to the current output ends of the first lower bridge arm switch tube Q2, the second lower bridge arm switch tube (not shown) and the third lower bridge arm switch tube (not shown), and the second end of the second current sampling resistor R7 is grounded; the first end of the third current sampling resistor R8 is respectively connected to the current output ends of the fourth lower bridge arm switch tube Q4, the fifth lower bridge arm switch tube (not shown) and the sixth lower bridge arm switch tube (not shown), and the second end of the third current sampling resistor R8 is grounded. In this embodiment, the first end of the first current sampling resistor R6 is also connected to the first input end of the overcurrent protection circuit 1072 in the driver IC circuit 100, the first end of the second current sampling resistor R7 is also connected to the second input end of the overcurrent protection circuit 1072 in the driver IC circuit 100, and the first end of the third current sampling resistor R8 is also connected to the third input end of the overcurrent protection circuit 1072 in the driver IC circuit 100.

[0062] The intelligent power module 200 of this embodiment further includes a temperature detection circuit 201 for detecting the temperature of the intelligent power module 200 of this embodiment. The temperature detection circuit 201 is connected to the input end of the over-temperature protection circuit 1073 in the driver IC circuit 100 .

[0063] In this embodiment, the PFC switch tube Q5, the first upper bridge arm switch tube Q1, the second upper bridge arm switch tube (not shown in the figure), the third upper bridge arm switch tube (not shown in the figure), the first lower bridge arm switch tube Q2, the second lower bridge arm switch tube (not shown in the figure), the third lower bridge arm switch tube (not shown in the figure), the fourth upper bridge arm switch tube Q3, the fifth upper bridge arm switch tube (not shown in the figure), the sixth upper bridge arm switch tube (not shown in the figure), the fourth lower bridge arm switch tube Q4, the fifth lower bridge arm switch tube (not shown in the figure) and the sixth lower bridge arm switch tube (not shown in the figure) are IGBT tubes.

[0064] The intelligent power module 200 of this embodiment further includes a first high-voltage area power supply input terminal P1, a second high-voltage area power supply input terminal P2, a plurality of freewheeling diodes (such as freewheeling diode FRD1, freewheeling diode FRD2, freewheeling diode FRD3, freewheeling diode FRD4 and freewheeling diode FRD5), a PFC signal output terminal PFCOUT and a first diode D1. Specifically, in this embodiment, the collector of the first upper arm switch tube Q1, the collector of the second upper arm switch tube (not shown), the collector of the third upper arm switch tube (not shown), the collector of the fourth upper arm switch tube Q3, the collector of the fifth upper arm switch tube (not shown), and the collector of the sixth upper arm switch tube (not shown) are connected to the first high-voltage area power supply input terminal P1, the emitter of the first upper arm switch tube Q1 is connected to the collector of the first lower arm switch tube Q2, the emitter of the second upper arm switch tube (not shown) is connected to the collector of the second lower arm switch tube (not shown), the emitter of the third upper arm switch tube (not shown) is connected to the collector of the third lower arm switch tube (not shown), the emitter of the fourth upper arm switch tube Q3 is connected to the collector of the fourth lower arm switch tube Q4, and the emitter of the fifth upper arm switch tube (not shown) is connected to the collector of the fifth lower arm switch tube The collector of the sixth upper bridge arm switch tube (not shown) is connected, the emitter of the sixth lower bridge arm switch tube (not shown) is connected to the collector of the sixth lower bridge arm switch tube (not shown); the emitter of the first lower bridge arm switch tube Q2, the emitter of the second lower bridge arm switch tube (not shown) and the emitter of the third lower bridge arm switch tube (not shown) are connected to the first end of the second current sampling resistor R7, the emitter of the fourth lower bridge arm switch tube Q4, the emitter of the fifth lower bridge arm switch tube (not shown) and the emitter of the sixth lower bridge arm switch tube (not shown) are connected to the first end of the third current sampling resistor R8; the collector of the PFC switch tube Q5 is respectively connected to the PFC signal output terminal PFCOUT and the anode of the first diode D1, the cathode of the first diode D1 is connected to the second high voltage area power supply input terminal P2, and the emitter of the PFC switch tube Q5 is connected to the first end of the first current sampling resistor R6.

[0065] In this embodiment, the cathode of the freewheeling diode FRD1 is connected to the collector of the first upper bridge arm switch tube Q1, the anode of the freewheeling diode FRD1 is connected to the emitter of the first upper bridge arm switch tube Q1, the cathode of the freewheeling diode FRD2 is connected to the collector of the first lower bridge arm switch tube Q2, the anode of the freewheeling diode FRD2 is connected to the emitter of the first lower bridge arm switch tube Q2, the cathode of the freewheeling diode FRD3 is connected to the collector of the fourth upper bridge arm switch tube Q3, the anode of the freewheeling diode FRD3 is connected to the emitter of the fourth upper bridge arm switch tube Q3, the cathode of the freewheeling diode FRD4 is connected to the collector of the fourth lower bridge arm switch tube Q4, and the anode of the freewheeling diode FRD4 is connected to the emitter of the fourth lower bridge arm switch tube Q4. Similarly, a freewheeling diode (not shown) is connected between the collector and the emitter of each other switch tube, which will not be repeated here.

[0066] In this embodiment, the connection node between the first upper bridge arm switch tube Q1 and the first lower bridge arm switch tube Q2, the connection node between the second upper bridge arm switch tube and the second lower bridge arm switch tube, and the connection node between the third upper bridge arm switch tube and the third lower bridge arm switch tube are connected to the external first motor M1, and the connection node between the fourth upper bridge arm switch tube Q3 and the fourth lower bridge arm switch tube Q4, the connection node between the fifth upper bridge arm switch tube and the fifth lower bridge arm switch tube, and the connection node between the sixth upper bridge arm switch tube and the sixth lower bridge arm switch tube are connected to the external second motor M2. When the intelligent power module 200 of this embodiment is applied to an air conditioner (such as a variable frequency air conditioner), the first motor M1 can be a fan of the air conditioner, and the second motor M2 can be a compressor of the air conditioner.

[0067] Since the driving IC circuit 100 inside the intelligent power module 200 of this embodiment integrates the first upper bridge driving circuit 102, the first lower bridge driving circuit 103, the second upper bridge driving circuit 104, the second lower bridge driving circuit 105 and the PFC driving circuit 106 into the same IC chip, the intelligent power module 200 of this embodiment further improves the integration of the intelligent power module compared to the intelligent power module in the prior art, thereby reducing the cost of the intelligent power module. In addition, the intelligent power module 200 of this embodiment shares a set of protection circuits 107 for the external first motor M1, the external second motor M2 and the PFC switch tube Q5. Specifically, in this embodiment, when the low-voltage side power supply input terminal VDD of the driver IC circuit 100 is undervoltage, the low-voltage side undervoltage protection circuit 1071 in the protection circuit 107 will output a first undervoltage protection signal to the error judgment logic circuit 108. In this embodiment, when any of the above-mentioned switch tubes has an overcurrent, the overcurrent protection circuit 1072 in the protection circuit 107 will output an overcurrent protection signal to the error judgment logic circuit 108. When the temperature of the intelligent power module 200 of this embodiment is too high, the overtemperature protection circuit 1073 in the protection circuit 107 will output an overtemperature protection signal. The error judgment logic circuit 108 outputs an error signal to the error signal output terminal FUALT when receiving the first under-voltage protection signal, the over-current protection signal or / and the over-temperature protection signal. The error signal output terminal FUALT is connected to an external controller (not shown). When the external controller receives the error signal, the external controller outputs a corresponding control signal to the driver IC circuit 100 to control the first upper bridge driver circuit 102, the first lower bridge driver circuit 103, the second upper bridge driver circuit 104, the second lower bridge driver circuit 105 and the PFC driver circuit 106 to stop working, thereby controlling the first motor M1, the second motor M2 and the PFC switch tube Q5 to stop working. Similarly, in this embodiment, when the high-voltage side power supply input terminal (not shown) of the driver IC circuit 100 is undervoltage, the high-voltage side undervoltage protection circuit 110 will output a second undervoltage protection signal to the logic input buffer circuit 101 to control the first upper bridge drive circuit 102, the first lower bridge drive circuit 103, the second upper bridge drive circuit 104, the second lower bridge drive circuit 105 and the PFC drive circuit 106 to stop working. That is, this embodiment can effectively prevent the situation where one of the separation devices has a problem and causes other modules to continue to work, thereby better protecting the intelligent power module 200 of this embodiment and improving the reliability of the intelligent power module 200.

[0068] In summary, the intelligent power module 200 of this embodiment adopts the highly integrated driving IC circuit 100, and the intelligent power module 200 of this embodiment shares a set of protection circuits 107, which simplifies the internal structure of the highly integrated intelligent power module (also called highly integrated IPM), greatly improves the integration and reliability of the intelligent power module, and also reduces the cost and volume; the intelligent power module 200 of this embodiment also reduces the difficulty of internal wiring of the intelligent power module. The intelligent power module 200 of this embodiment has the advantages of simple and reasonable structure, flexible operation, low cost, high integration, high reliability and wide application range.

[0069] The present invention also provides an air conditioner, which includes an intelligent power module. The structure of the intelligent power module can refer to the above embodiment and will not be described in detail here. As a matter of course, since the air conditioner of this embodiment adopts the technical solution of the above intelligent power module, the air conditioner has all the beneficial effects of the above intelligent power module.

[0070] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A driver IC circuit for an intelligent power module, characterized in that: The driving IC circuit includes an upper bridge control signal input terminal, a lower bridge control signal input terminal, a PFC control signal input terminal, a logic input buffer circuit, a first upper bridge driving circuit, a second upper bridge driving circuit, a first lower bridge driving circuit, a second lower bridge driving circuit and a PFC driving circuit; wherein: The logic input buffer circuit is used to perform rectification and filtering processing on the control signals input from the upper bridge control signal input terminal, the lower bridge control signal input terminal and the PFC control signal input terminal, and output the control signals after rectification and filtering processing to the first upper bridge driving circuit, the second upper bridge driving circuit, the first lower bridge driving circuit, the second lower bridge driving circuit and the PFC driving circuit accordingly; The first upper bridge driving circuit is used to drive the operation of the upper bridge arm switch tube corresponding to the external first motor according to the control signal output by the logic input buffer circuit; The first lower bridge driving circuit is used to drive the operation of the lower bridge arm switch tube corresponding to the external first motor according to the control signal output by the logic input buffer circuit; The second upper bridge driving circuit is used to drive the operation of the upper bridge arm switch tube corresponding to the external second motor according to the control signal output by the logic input buffer circuit; The second lower bridge driving circuit is used to drive the operation of the lower bridge arm switch tube corresponding to the external second motor according to the control signal output by the logic input buffer circuit; The PFC driving circuit is used to drive the operation of the external PFC switch tube according to the control signal output by the logic input buffer circuit; The driving IC circuit further includes an enable terminal, an error signal output terminal, a reset terminal, a protection circuit, an error judgment logic circuit and a driving logic circuit; the driving IC circuit is reset when a reset signal is input to the reset terminal; wherein: The protection circuit is used to output a first undervoltage protection signal to the error judgment logic circuit when undervoltage occurs at the input end of the low-voltage side power supply of the driver IC circuit, output an overcurrent protection signal to the error judgment logic circuit when overcurrent occurs in any of the switch tubes, and output an overtemperature protection signal to the error judgment logic circuit when overtemperature occurs in the intelligent power module; The error judgment logic circuit is used to output an error signal to the error signal output terminal when receiving the first undervoltage protection signal, the overcurrent protection signal or / and the overtemperature protection signal; The driving logic circuit is used to output a start signal to the logic input buffer circuit when the error judgment logic circuit does not output the error signal and the enable end inputs an enable signal, so as to control the first upper bridge driving circuit, the second upper bridge driving circuit, the first lower bridge driving circuit, the second lower bridge driving circuit and the PFC driving circuit to start working.

2. The driving IC circuit of the intelligent power module according to claim 1, characterized in that: The protection circuit includes a low-voltage side undervoltage protection circuit, an overcurrent protection circuit and an overtemperature protection circuit; wherein: The low-voltage side undervoltage protection circuit is used to output a first undervoltage protection signal to the error judgment logic circuit when an undervoltage occurs at the low-voltage side power supply input terminal of the driver IC circuit; The overcurrent protection circuit is used to output an overcurrent protection signal to the error judgment logic circuit when an overcurrent occurs in any of the switch tubes; The over-temperature protection circuit is used to output an over-temperature protection signal to the error judgment logic circuit when the intelligent power module is over-heated.

3. The driving IC circuit of the intelligent power module according to claim 2, characterized in that: The driver IC circuit also includes: The high-voltage side undervoltage protection circuit is used to output a second undervoltage protection signal to the logic input buffer circuit when undervoltage occurs at the high-voltage side power supply input end of the driver IC circuit, so as to control the first upper bridge drive circuit, the second upper bridge drive circuit, the first lower bridge drive circuit, the second lower bridge drive circuit and the PFC drive circuit to stop working.

4. An intelligent power module, characterized in that: The intelligent power module includes a PFC switch tube, a plurality of resistors, a first upper bridge arm switch tube corresponding to an external first motor, a second upper bridge arm switch tube, a third upper bridge arm switch tube, a first lower bridge arm switch tube, a second lower bridge arm switch tube and a third lower bridge arm switch tube, a fourth upper bridge arm switch tube, a fifth upper bridge arm switch tube, a sixth upper bridge arm switch tube, a fourth lower bridge arm switch tube, a fifth lower bridge arm switch tube and a sixth lower bridge arm switch tube corresponding to an external second motor, and a driving IC circuit of the intelligent power module according to any one of claims 2 to 3; wherein: The first output end of the first upper bridge driving circuit in the driving IC circuit is connected to the control end of the first upper bridge arm switch tube via the resistor, the second output end of the first upper bridge driving circuit is connected to the control end of the second upper bridge arm switch tube via the resistor, and the third output end of the first upper bridge driving circuit is connected to the control end of the third upper bridge arm switch tube via the resistor; the first output end of the first lower bridge driving circuit in the driving IC circuit is connected to the control end of the first lower bridge arm switch tube via the resistor, the second output end of the first lower bridge driving circuit is connected to the control end of the second lower bridge arm switch tube via the resistor, and the third output end of the first lower bridge driving circuit is connected to the control end of the third lower bridge arm switch tube via the resistor; The first output end of the second upper bridge driving circuit in the driving IC circuit is connected to the control end of the fourth upper bridge arm switch tube via the resistor, the second output end of the second upper bridge driving circuit is connected to the control end of the fifth upper bridge arm switch tube via the resistor, and the third output end of the second upper bridge driving circuit is connected to the control end of the sixth upper bridge arm switch tube via the resistor; the first output end of the second lower bridge driving circuit in the driving IC circuit is connected to the control end of the fourth lower bridge arm switch tube via the resistor, the second output end of the second lower bridge driving circuit is connected to the control end of the fifth lower bridge arm switch tube via the resistor, and the third output end of the second lower bridge driving circuit is connected to the control end of the sixth lower bridge arm switch tube via the resistor; The output end of the PFC driving circuit in the driving IC circuit is connected to the control end of the PFC switch tube via the resistor.

5. The intelligent power module according to claim 4, characterized in that: The intelligent power module further includes a first current sampling resistor, a second current sampling resistor and a third current sampling resistor; wherein: The first end of the first current sampling resistor is connected to the current output end of the PFC switch tube, the first end of the second current sampling resistor is respectively connected to the current output ends of the first lower bridge arm switch tube, the second lower bridge arm switch tube and the third lower bridge arm switch tube, the first end of the third current sampling resistor is respectively connected to the current output ends of the fourth lower bridge arm switch tube, the fifth lower bridge arm switch tube and the sixth lower bridge arm switch tube, the second end of the first current sampling resistor, the second end of the second current sampling resistor and the second end of the third current sampling resistor are grounded; the first end of the first current sampling resistor is also connected to the first input end of the overcurrent protection circuit in the drive IC circuit, the first end of the second current sampling resistor is also connected to the second input end of the overcurrent protection circuit in the drive IC circuit, and the first end of the third current sampling resistor is also connected to the third input end of the overcurrent protection circuit in the drive IC circuit.

6. The intelligent power module according to claim 5, characterized in that: The intelligent power module further comprises a temperature detection circuit for detecting the temperature of the intelligent power module, and the temperature detection circuit is connected to an input end of the over-temperature protection circuit in the driving IC circuit.

7. The intelligent power module according to any one of claims 5 to 6, characterized in that: The PFC switch tube, the first upper bridge arm switch tube, the second upper bridge arm switch tube, the third upper bridge arm switch tube, the first lower bridge arm switch tube, the second lower bridge arm switch tube, the third lower bridge arm switch tube, the fourth upper bridge arm switch tube, the fifth upper bridge arm switch tube, the sixth upper bridge arm switch tube, the fourth lower bridge arm switch tube, the fifth lower bridge arm switch tube and the sixth lower bridge arm switch tube are IGBT tubes.

8. The intelligent power module according to claim 7, characterized in that: The intelligent power module further includes a first high-voltage area power supply input terminal, a second high-voltage area power supply input terminal, a plurality of freewheeling diodes, a PFC signal output terminal and a first diode; wherein: The collector of the first upper arm switch tube, the collector of the second upper arm switch tube, the collector of the third upper arm switch tube, the collector of the fourth upper arm switch tube, the collector of the fifth upper arm switch tube, and the collector of the sixth upper arm switch tube are connected to the first high-voltage area power supply input terminal, the emitter of the first upper arm switch tube is connected to the collector of the first lower arm switch tube, the emitter of the second upper arm switch tube is connected to the collector of the second lower arm switch tube, the emitter of the third upper arm switch tube is connected to the collector of the third lower arm switch tube, the emitter of the fourth upper arm switch tube is connected to the collector of the fourth lower arm switch tube, the emitter of the fifth upper arm switch tube is connected to the collector of the fifth lower arm switch tube, and the sixth upper arm switch tube The emitter of the first lower bridge arm switch tube is connected to the collector of the sixth lower bridge arm switch tube; the emitter of the first lower bridge arm switch tube, the emitter of the second lower bridge arm switch tube and the emitter of the third lower bridge arm switch tube are connected to the first end of the second current sampling resistor, and the emitter of the fourth lower bridge arm switch tube, the emitter of the fifth lower bridge arm switch tube and the emitter of the sixth lower bridge arm switch tube are connected to the first end of the third current sampling resistor; the collector of the PFC switch tube is respectively connected to the PFC signal output end and the anode of the first diode, the cathode of the first diode is connected to the second high-voltage area power supply input end, and the emitter of the PFC switch tube is connected to the first end of the first current sampling resistor; a freewheeling diode is connected between the collector and emitter of each switch tube; A connection node between the first upper bridge arm switch tube and the first lower bridge arm switch tube, a connection node between the second upper bridge arm switch tube and the second lower bridge arm switch tube, and a connection node between the third upper bridge arm switch tube and the third lower bridge arm switch tube are connected to an external first motor, and a connection node between the fourth upper bridge arm switch tube and the fourth lower bridge arm switch tube, a connection node between the fifth upper bridge arm switch tube and the fifth lower bridge arm switch tube, and a connection node between the sixth upper bridge arm switch tube and the sixth lower bridge arm switch tube are connected to an external second motor.

9. An air conditioner, characterized in that: The air conditioner comprises the intelligent power module according to any one of claims 4 to 8.

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