CN108281941B - Intelligent power module, air conditioner controller and air conditioner - Google Patents
Intelligent power module, air conditioner controller and air conditioner Download PDFInfo
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- CN108281941B CN108281941B CN201810057591.4A CN201810057591A CN108281941B CN 108281941 B CN108281941 B CN 108281941B CN 201810057591 A CN201810057591 A CN 201810057591A CN 108281941 B CN108281941 B CN 108281941B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
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Abstract
The invention provides an intelligent power module, an air conditioner controller and an air conditioner, wherein a detection circuit, an upper bridge over-current control circuit and a lower bridge over-current control circuit are added in the air conditioner, the sampling resistor is changed into a built-in structure, so that when the intelligent power module drives the load to generate overcurrent, the voltage signal on the sampling resistor can be fed back in a delayed manner during the overcurrent, therefore, the voltage noise is filtered, the accuracy of overcurrent detection is improved, the upper bridge arm IGBT tubes of the three phases are controlled to be cut off by the upper bridge overcurrent control circuit during overcurrent, and when the overcurrent occurs and the environmental temperature is lower than a preset value, the three-phase lower bridge arm IGBT tubes are controlled to be conducted through the lower bridge over-current control circuit, so that induced charges generated by a load driven by the IPM module during over-current can be effectively discharged, therefore, the impact of residual charges on the IGBT tube is avoided, and the reliability of the IPM module is improved.
Description
Technical Field
The invention relates to the technical field of intelligent power modules, in particular to an intelligent power module, an air conditioner controller and an air conditioner.
Background
An Intelligent Power Module, i.e., an IPM (Intelligent Power Module), is a Power driving product combining Power electronics and integrated circuit technology. The intelligent power module integrates a power switch device and a high-voltage driving circuit, and is internally provided with fault detection circuits such as overvoltage, overcurrent and overheat. The intelligent power module receives a control signal of the MCU to drive a subsequent circuit to work on one hand, and sends a state detection signal of the system back to the MCU on the other hand. The intelligent power module is especially suitable for frequency converter of driving motor and various inverter power sources, and is an ideal power electronic device for frequency conversion speed regulation, metallurgical machinery, electric traction, servo drive and frequency conversion household appliances.
As shown in fig. 1, a Circuit structure of a conventional IPM module 100 includes HVIC transistors (High voltage integrated Circuit chips) 111, three-phase upper arm IGBT transistors (Insulated gate bipolar transistors) 111, 112, 113, and three-phase lower arm IGBT transistors 114, 115, 116, where the HVIC transistors 111 include therein a UH driving Circuit 101, a VH driving Circuit 102, and a WH driving Circuit 103 connected to the three-phase upper arm IGBT transistors, and a UL driving Circuit 104, a VL driving Circuit 105, and a WL driving Circuit 106 connected to the three-phase lower arm IGBT transistors, and the six driving circuits respectively drive six corresponding IGBT transistors to switch states under the control of six control signals input by the IPM module 100. The recommended circuit of the IPM module 100 during actual operation is shown in fig. 2, the IPM module 100 is connected to the MCU200 through six input control signals, the U, V, W three-phase output end of the IPM module 100 is connected to the three-phase winding of the motor 139, the capacitors 135, 136, 137 are bootstrap capacitors respectively connecting the three-phase output terminal and the positive end of the corresponding phase high-voltage power supply, the six control signals output by the MCU200 control the switching states of the six IGBT tubes of the IPM module 100 to switch, and output the corresponding three-phase driving signals to the motor 139, thereby driving the motor 139 to operate. Further, UN, VN, WN are connected to one end of a parallel resistor 138, the resistor 138 is used to detect the output current value of the IPM module 100 driving motor 139 and input the output current value to Pin7 Pin of the MCU, in practical applications, especially in variable frequency air conditioning applications, according to environmental changes, the MCU detects the voltage change of the resistor 138 to control the working state of the intelligent power module 100, when the voltage value of the resistor 138 is greater than a certain specific value, that is, when the current flowing through the intelligent power module 100 is greater than a certain specific value, it is proved that the intelligent power module 100 has a risk of abnormal heating due to overload operation, and the PINs 1-Pin 6 ends of the MCU tube 200 simultaneously output low levels to control the intelligent power module 100 to stop operating. Through the above mechanism, as long as the specific voltage value is set to be small enough, the smart power module 100 can be ensured not to be damaged, but the disadvantages caused by the method are also obvious:
firstly, the intelligent power module has a severe working environment and very high voltage noise, and is very easy to generate false triggering, so that the intelligent power module is shut down without overcurrent of actual current;
secondly, when a real overcurrent occurs, because the load of the intelligent power module 100 is an inductive element, the overcurrent inevitably generates residual charges, the sudden stop of the intelligent power module 100 causes the residual charges not to have a discharge loop and to be accumulated, and after the intelligent power module 100 is powered on again, the residual charges at the load end impact the IGBT tube, so that the IGBT tube may be slightly damaged, and in a serious case, the intelligent power module 100 may be burnt, so that a system is paralyzed, and even a fire hazard and other safety accidents are caused.
Disclosure of Invention
The invention mainly aims to provide an intelligent power module, an air conditioner controller and an air conditioner, and aims to solve the problems that overcurrent detection of the intelligent power module is easy to trigger by mistake due to interference in the working process, and induced charges generated by a load impact the intelligent power module to influence the working reliability of the intelligent power module.
In order to achieve the purpose, the intelligent power module provided by the invention comprises a three-phase upper bridge arm IGBT tube, a three-phase lower bridge arm IGBT tube, a driving circuit corresponding to each IGBT tube in the three-phase upper bridge arm IGBT tube and the three-phase lower bridge arm IGBT tube, and a bridge arm control signal input end, and is characterized by further comprising an overcurrent detection circuit, an upper bridge overcurrent control circuit and a lower bridge overcurrent control circuit;
the first output end of the over-current detection circuit is connected with the control end of the upper bridge over-current control circuit, the second output end of the over-current detection circuit is connected with the control end of the lower bridge over-current control circuit, three output ends of the upper bridge over-current control circuit are respectively connected with the driving circuits corresponding to the three-phase upper bridge arm IGBT tubes, three output ends of the lower bridge over-current control circuit are respectively connected with the driving circuits corresponding to the three-phase lower bridge arm IGBT tubes, and three input ends of the upper bridge over-current control circuit and the lower bridge over-current control circuit are respectively connected with the corresponding bridge arm control signal input ends;
the overcurrent detection circuit is used for detecting the current value of the intelligent power module driving load, when the current value is larger than a preset current threshold value, the overcurrent detection circuit outputs a protection signal to the upper bridge overcurrent control circuit and the lower bridge overcurrent control circuit so as to disconnect the bridge arm control signal input end corresponding to the corresponding IGBT tube from the driving circuit, control the three-phase upper bridge arm IGBT tube to be cut off, and simultaneously control the three-phase lower bridge arm IGBT tube to be conducted when the ambient temperature is lower than a preset temperature value so as to discharge the induced charge of the intelligent power module driving load.
In one possible design, the over-current detection circuit includes a comparison module, a delay module, and an output module;
the input end of the comparison module is the input end of the over-current detection circuit, the output end of the comparison module is connected with the input end of the delay module, the output end of the delay module is connected with the output module, and the two output ends of the output module are the output ends of the over-current detection circuit;
the input end of the comparison module is used for detecting an input voltage signal of the intelligent power module driving load current value, comparing the voltage signal with a preset voltage value, outputting an overcurrent signal to the delay module when the voltage signal exceeds the preset voltage value, delaying the overcurrent signal by the delay module and inputting the delayed overcurrent signal to the output module, and performing level conversion by the output module to output two paths of protection signals to the upper bridge overcurrent control circuit and the lower bridge overcurrent control circuit.
In one possible design, the comparison module includes a comparator, a first voltage source;
one end of the first voltage source is grounded, the other end of the first voltage source is connected with the non-inverting input end of the comparison module, and the inverting input end of the comparison module is the input end of the comparison module.
In one possible design, the delay module includes a delay circuit, a first not gate, and a second not gate;
the input end of the first not gate is the input end of the delay module, and the output end of the first not gate is connected with the input end of the delay circuit;
the output end of the delay circuit is connected with the input end of the second not gate, and the output end of the second not gate is the output end of the delay module.
In one possible design, the delay circuit includes a third not gate, a fourth not gate, and a first capacitor;
the input end of the third not gate is the input end of the delay circuit, the output end of the third not gate and one end of the first capacitor are connected to the input end of the fourth not gate in a shared mode, and the output end of the fourth not gate is the output end of the delay circuit.
In one possible design, the output module includes a fifth not gate;
the first output end of the output module and the input end of the output module are connected to the input end of the fifth not gate in a shared mode, and the output end of the fifth not gate is the second output end of the output module.
In one possible design, the lower bridge over-current control circuit includes a sixth not gate, a first resistor, a second thermistor, a second comparator, a first and gate, a second voltage source, a first or gate, a second or gate, and a third or gate;
one end of the second thermistor is connected with the anode of a low-voltage power supply of the intelligent power module, the common junction of the other end of the second thermistor and one end of the first resistor is connected with the inverting input end of the second comparator, the other end of the first resistor and one end of the second voltage source are connected to the ground in a common mode, and the other end of the second voltage source is connected with the non-inverting input end of the second comparator;
the input end of the sixth not gate is the control end of the lower bridge over-current control circuit, the output end of the sixth not gate is connected with one input end of the first and gate, and the output end of the second comparator is connected with the other input end of the first and gate;
the output end of the first AND gate is respectively connected with one input end of the first OR gate, the second OR gate and the third OR gate in a common mode, the other input ends of the first OR gate, the second OR gate and the third OR gate form three input ends of the lower bridge over-current control circuit, and the output ends of the first OR gate, the second OR gate and the third OR gate form three output ends of the lower bridge over-current control circuit.
In one possible design, the upper bridge over-current control circuit comprises a seventh not gate, a second and gate, a third and gate and a fourth and gate;
the input end of the seventh not gate is the control end of the upper bridge over-current control circuit, the output end of the seventh not gate is respectively connected with one input end of the second and gate, one input end of the third and gate and one input end of the fourth and gate, the other input ends of the second and gate, the third and gate and the fourth and gate form three input ends of the upper bridge over-current control circuit, and the output ends of the second and gate, the third and gate and the fourth and gate form three output ends of the upper bridge over-current control circuit.
In order to achieve the above object, the present invention further provides an air conditioner controller, wherein the air conditioner comprises the intelligent power module.
In order to achieve the above object, the present invention further provides an air conditioner, which includes the air conditioner controller.
According to the intelligent power module provided by the invention, the detection circuit, the upper bridge over-current control circuit and the lower bridge over-current control circuit are added in the intelligent power module, and the sampling resistor is changed into a built-in structure, so that when the intelligent power module drives a load to generate over-current, a voltage signal on the sampling resistor during over-current can be subjected to delay feedback, and thus the filtering of voltage noise is realized, the accuracy of over-current detection is improved, the upper bridge over-current control circuit controls the three-phase upper bridge arm IGBT tubes to be all cut off during over-current, and when over-current occurs and the ambient temperature is lower than a preset value, the lower bridge over-current control circuit controls the three-phase lower bridge arm IGBT tubes to be all conducted, and induced charges generated by the load driven by the IPM module during over-current can be effectively discharged, so that the residual charges are prevented from impacting the IGBT.
Drawings
FIG. 1 is a circuit block diagram of a prior art smart power module;
FIG. 2 is a circuit diagram of the actual operation of a prior art smart power module;
FIG. 3 is a circuit block diagram of the smart power module of the present invention;
FIG. 4 is a specific circuit structure diagram of the output adjustment circuit shown in FIG. 3;
FIG. 5 is a detailed enlarged view of the circuit of area A in FIG. 4;
fig. 6 is a specific circuit configuration diagram of the delay circuit in fig. 4.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
Referring to fig. 3, fig. 3 is a schematic structural diagram of an IPM module 4100 according to a first embodiment of the present invention, and for convenience of illustration, only the relevant parts related to the embodiment of the present invention are shown.
In this embodiment, the IPM module 4100 includes a three-phase upper bridge arm IGBT tube and a three-phase lower bridge arm IGBT tube, and a driving circuit and a bridge arm control signal input terminal corresponding to each of the three-phase upper bridge arm IGBT tube and the three-phase lower bridge arm IGBT tube, and the IPM module 4100 further includes an overcurrent detection circuit 4302, an upper bridge overcurrent control circuit 4304, and a lower bridge overcurrent control circuit 4303;
a first output end of the over-current detection circuit 4302 is connected with a control end of the lower bridge over-current control circuit 4303, a second output end of the over-current detection circuit 4302 is connected with a control end of the upper bridge over-current control circuit 4304, three output ends of the upper bridge over-current control circuit 4304 are respectively connected with a driving circuit corresponding to a three-phase upper bridge arm IGBT tube, three output ends of the lower bridge over-current control circuit 4303 are respectively connected with a driving circuit corresponding to a three-phase lower bridge arm IGBT tube, and three input ends of the upper bridge over-current control circuit 4304 and the lower bridge over-current control circuit 4303 are respectively connected with corresponding bridge arm control signal;
the over-current detection circuit 4302 is configured to detect a current value of a load driven by the intelligent power module 4100, and when the current value is greater than a preset current threshold, the over-current detection circuit 4302 outputs a protection signal to the upper bridge over-current control circuit 4304 and the lower bridge over-current control circuit 4303 to disconnect the bridge arm control signal input end corresponding to the corresponding IGBT tube from the drive circuit, control the three-phase upper bridge arm IGBT tube to be turned off, and control the three-phase lower bridge arm IGBT tube to be turned on when the ambient temperature is lower than a preset temperature value, so as to discharge an induced charge of the load driven by the intelligent power module 4100.
As shown in fig. 2, the intelligent power module 4100 includes a power driving circuit 4400 and a sampling resistor 4301 for detecting the magnitude of the current value of the driving load of the intelligent power module 4100, where the sampling resistor 4301 is integrated in the intelligent power module 4100, and of course, the sampling resistor 4301 may also be connected to the intelligent power module 4100, where a power supply positive terminal VCC of the power driving circuit 4400 serves as a low-voltage area power supply positive terminal VDD of the intelligent power module 4100, and VDD is generally 15V;
a first input terminal HIN1 of the power driving circuit 4400 serves as a U-phase upper bridge arm input terminal UHIN of the intelligent power module 4100, a second input terminal HIN2 of the power driving circuit 4400 serves as a V-phase upper bridge arm input terminal VHIN of the intelligent power module 4100, a third input terminal HIN3 of the power driving circuit 4400 serves as a W-phase upper bridge arm input terminal WHIN of the intelligent power module 4100, a fourth input terminal LIN1 of the power driving circuit 4400 serves as a U-phase lower bridge arm input terminal ULIN of the intelligent power module 4100, a fifth input terminal 2 of the power driving circuit 4400 serves as a V-phase lower bridge arm input terminal VLIN of the intelligent power module 4100, and a sixth input terminal 3 of the power driving circuit 4400 serves as a W-phase lower bridge arm input terminal WLIN of the intelligent power module 4100.
A seventh output terminal ITRIP of the power driving circuit 4400 is connected to the U-phase low-voltage reference terminal UN of the power driving circuit 4400, the V-phase low-voltage reference terminal VN of the power driving circuit 4400, the W-phase low-voltage reference terminal WN of the power driving circuit 4400, and one end of the sampling resistor 4301, and serves as an abnormal feedback terminal ISO of the intelligent power module 4100.
A power supply negative terminal GND of the power driving circuit 4400 is connected with the other end of the sampling resistor 4301 and serves as a lowest voltage reference point N of the intelligent power module 4100, a U-phase high-voltage area power supply positive terminal VB1 of the power driving circuit 4400 is connected with one end of the capacitor 4133 and serves as a U-phase high-voltage area power supply positive terminal UVB of the intelligent power module 4100, and a U-phase high-voltage area power supply negative terminal VS1 of the power driving circuit 4400 is connected with the other end of the capacitor 4133 and serves as a U-phase high-voltage area power supply negative terminal UVS of the intelligent power module 4100; a positive end VB2 of a V-phase high-voltage region power supply source of the power driving circuit 4400 is connected with one end of the capacitor 4132 and serves as a positive end VVB of the V-phase high-voltage region power supply source of the intelligent power module 4100, and a negative end VS2 of the V-phase high-voltage region power supply source of the power driving circuit 4400 is connected with the other end of the capacitor 4132 and serves as a negative end VVS of the V-phase high-voltage region power supply source of the intelligent power module 4100; a W-phase high-voltage region power supply positive terminal VB3 of the power driving circuit 4400 is connected to one end of the capacitor 4131 and serves as a W-phase high-voltage region power supply positive terminal WVB of the intelligent power module 4100, a W-phase high-voltage region power supply negative terminal VS3 of the power driving circuit 4400 is connected to the other end of the capacitor 4131 and serves as a W-phase high-voltage region power supply negative terminal WVS of the intelligent power module 4100, and a highest voltage reference terminal P of the power driving circuit 4400 serves as a highest voltage reference point P of the intelligent power module 4100.
In the power driving circuit 4400, a voltage signal ITRIP is connected to an input end of the overcurrent detection circuit 4302; a first output end of the over-current detection circuit 4302 is connected to a control end of the lower bridge over-current control circuit 4303, and a second output end of the over-current detection circuit 4302 is connected to a control end of the upper bridge over-current control circuit 4304.
An LIN1 end of the power driving circuit 4400 is connected with a first input end of the lower bridge over-current control circuit 4303, an LIN2 end of the lower bridge over-current control circuit 4303, an LIN3 end of the lower bridge over-current control circuit 4303, an HIN1 end of the power driving circuit is connected with a first input end of the upper bridge over-current control circuit 4304, an HIN2 end of the power driving circuit 4400 is connected with a second input end of the upper bridge over-current control circuit 4304, and an HIN3 end of the power driving circuit 43034.
Specifically, a specific circuit of the over-current detection circuit 4302, the upper bridge over-current control circuit 4304, and the lower bridge over-current control circuit 4303 based on the above scheme is shown in fig. 4, and a further circuit diagram of the amplifying circuit of the above portion can be seen in fig. 5, where the specific circuit is as follows:
the over-current detection circuit 4302 comprises a comparison module 10, a delay module 20 and an output module 30;
the input end of the comparison module 10 is the input end of the over-current detection circuit 4302, the output end of the comparison module 10 is connected with the input end of the delay module 20, the output end of the delay module 20 is connected with the output module 30, and two output ends of the output module 30 are the output ends of the over-current detection circuit 4302;
the input end of the comparison module 10 is used for detecting a voltage signal itrp of an input intelligent power module driving load current value, comparing the voltage signal with a preset voltage value, outputting an overcurrent signal to the delay module 20 when the voltage value exceeds the preset voltage value, delaying the voltage signal by the delay module 20, inputting the delayed overcurrent signal to the output module 30, and performing level conversion by the output module 30 to output two paths of protection signals to the upper bridge overcurrent control circuit 4304 and the lower bridge overcurrent control circuit 4303.
Further, as a specific application circuit of the comparing module 10, the comparing module 10 includes a comparator 4312, a first voltage source 4322; one end of the first voltage source 4322 is grounded, the other end is connected to the non-inverting input terminal of the comparing module 10, and the directional input terminal of the comparing module 10 is the input terminal of the comparing module 10.
The delay module 20 includes a delay circuit 4342, a first not gate 4332 and a second not gate 4352;
the input end of the first not gate 4332 is the input end of the delay module 20, and the output end of the first not gate 4332 is connected to the input end of the delay circuit 4342;
the output terminal of the delay circuit 4342 is connected to the input terminal of the second not gate 4352, and the output terminal of the second not gate 4352 is the output terminal of the delay module 20.
Further, as a specific application circuit of the delay circuit 4342, as shown in fig. 6, the delay circuit 4342 includes a third not gate 43421, a fourth not gate 43422 and a first capacitor 43423, where the delay circuit mainly charges through the first capacitor 4345 to implement a delay function;
the input terminal of the third not gate 43421 is the input terminal of the delay circuit 4342, the output terminal of the third not gate 43421 and one end of the first capacitor 43422 are commonly connected to the input terminal of the fourth not gate 43422, and the output terminal of the fourth not gate 43422 is the output terminal of the delay circuit 4342.
The output module 30 includes a fifth not gate 4362;
the first output end OUT1 of the output block 30 and the input end of the output block 30 are commonly connected to the input end of the fifth not gate 4362, and the output end of the fifth not gate 4362 is the second output end OUT2 of the output block 30.
Further, as a specific application circuit of the lower bridge over-current control circuit 4303, the lower bridge over-current control circuit 4303 includes a sixth not gate 4313, a second thermistor 4383, a first resistor 4393, a second comparator 4373, a first and gate 4353, a second voltage source 4363, a first or gate 4343, a second or gate 4333, and a third or gate 4323;
one end of the second thermistor 4383 is connected to the positive electrode VDD of the low-voltage power supply of the intelligent power module 4100, a common junction of the other end of the second thermistor 4383 and one end of the first resistor 4393 is connected to the inverting input terminal of the second comparator 4373, the other end of the first resistor 4393 and one end of the second voltage source 4363 are connected to ground, and the other end of the second voltage source 4363 is connected to the non-inverting input terminal of the second comparator 4373;
the input end of the sixth not gate 4313 is the control end of the lower bridge over-current control circuit 4303, the output end of the sixth not gate 4313 is connected to one input end of the first and gate 4353, and the output end of the second comparator 4373 is connected to the other input end of the first and gate 4353;
the output terminal of the first and gate 4353 is commonly connected to one input terminal of the first or gate 4343, the second or gate 4333 and the third or gate 4323, the other input terminals of the first or gate 4343, the second or gate 4333 and the third or gate 4323 form three input terminals of the under-bridge over-current control circuit 4303, and the output terminals of the first or gate 4343, the second or gate 4333 and the third or gate 4323 form three output terminals of the under-bridge over-current control circuit 4303.
Further, as a specific application circuit of the upper bridge over-current control circuit 4304, the upper bridge over-current control circuit 4304 includes a seventh not gate 4314, a second and gate 4344, a third and gate 4334, and a fourth and gate 4324;
the input end of the seventh not gate 4314 is the control end of the upper bridge over-current control circuit 4304, the output end of the seventh not gate 4314 is respectively connected to one input end of the second and gate 4344, the third and gate 4334 and the fourth and gate 4324, the other input ends of the second and gate 4344, the third and gate 4334 and the fourth and gate 4324 form three input ends of the upper bridge over-current control circuit 4304, and the output ends of the second and gate 4344, the third and gate 4334 and the fourth and gate 4324 form three output ends of the upper bridge over-current control circuit 4304.
It should be noted that the circuit structure of the delay circuit 4342 is only a specific application circuit, and may be implemented by other application circuits, such as a counter delay circuit.
In the specific circuit shown in fig. 4, the power driving circuit 4400 further includes three-phase upper arm IGBT tubes 4111, 4112, 4113, a UH driving circuit 4101, a VH driving circuit 4102 and a WH driving circuit 4103 respectively connected to the three-phase upper arm IGBT tubes, and the power driving circuit 4400 further includes three-phase lower arm IGBT tubes 4114, 4115, 4116, and a UL driving circuit 4104, a VL driving circuit 4105 and a WL driving circuit 4106 respectively connected to the three-phase lower arm IGBT tubes.
Specifically, a first output terminal of the upper bridge overcurrent control circuit 4304 is connected to an input terminal of the UH driver circuit 4101, a second output terminal of the upper bridge overcurrent control circuit 4304 is connected to an input terminal of the VH driver circuit 4102, a third output terminal of the upper bridge overcurrent control circuit 4304 is connected to an input terminal of the WH driver circuit 4103, a first output terminal of the lower bridge overcurrent control circuit 4303 is connected to an input terminal of the UL driver circuit 4104, a second output terminal of the lower bridge overcurrent control circuit 4303 is connected to an input terminal of the VL driver circuit 4105, and a third output terminal of the lower bridge overcurrent control circuit 4303 is connected to an input terminal of the WL driver circuit 4106.
Here, the U, V, W three-phase six-input of the smart power module 4100 receives input signals of 0V or 5V.
The GND terminal of the power driver circuit 4400 serves as the low-voltage power supply negative terminal COM of the intelligent power module 4100, and is connected to the low-voltage power supply negative terminals of the UH driver circuit 4101, the VH driver circuit 4102, the WH driver circuit 4103, the UL driver circuit 4104, the VL driver circuit 4105, and the WL driver circuit 4106.
The VB1 end of the power driving circuit 4400 is connected to the positive end of the high-voltage power supply of the UH driving circuit 4101 inside the power driving circuit 4400, and is connected to one end of the capacitor 4131 outside the power driving circuit 4400, and is used as the positive end UVB of the U-phase high-voltage power supply of the intelligent power module 4100.
The HO1 terminal of the power driving circuit 4400 is connected to the output terminal of the UH driving circuit 4101 inside the power driving circuit 4400, and is connected to the gate of the U-phase upper arm IGBT tube 4121 outside the power driving circuit 4400.
The VS1 end of the power driving circuit 4400 is connected to the negative end of the high-voltage area power supply of the UH driving circuit 4101 inside the power driving circuit 4400, and is connected to the emitter of the IGBT 4121, the anode of the FRD tube 4111, the collector of the U-phase lower arm IGBT 4124, the cathode of the FRD tube 4114, and the other end of the capacitor 4131 outside the power driving circuit 4400, and serves as the negative end UVS of the U-phase high-voltage area power supply of the intelligent power module 4100.
The VB2 end of the power driving circuit 4400 is connected to the positive end of the high-voltage region power supply of the VH driving circuit 4102 inside the power driving circuit 4400, and one end of the capacitor 4132 is connected to the outside of the power driving circuit 4400 as the positive end VVB of the U-phase high-voltage region power supply of the intelligent power module 4100.
The HO2 terminal of the power driver circuit 4400 is connected to the output terminal of the VH driver circuit 4102 inside the power driver circuit 4400, and is connected to the gate of the V-phase upper arm IGBT tube 4122 outside the power driver circuit 4400.
The VS2 end of the power driving circuit 4400 is connected to the negative end of the high-voltage area power supply of the VH driving circuit 4102 inside the power driving circuit 4400, and is connected to the emitter of the IGBT 4122, the anode of the FRD tube 4112, the collector of the V-phase lower arm IGBT 4125, the cathode of the FRD tube 4115, and the other end of the capacitor 4132 outside the power driving circuit 4400, and is used as the negative end VVS of the V-phase high-voltage area power supply of the intelligent power module 4100.
The VB3 end of the power driving circuit 4400 is connected to the positive end of the high voltage power supply of the WH driving circuit 4103 inside the power driving circuit 4400, and one end of the capacitor 4133 is connected to the outside of the power driving circuit 4400 as the positive end WVB of the W-phase high voltage power supply of the intelligent power module 4100.
The HO3 terminal of the power driving circuit 4400 is connected to the output terminal of the WH driving circuit 4103 inside the power driving circuit 4400, and is connected to the gate of the W-phase upper arm IGBT 4123 outside the power driving circuit 4400.
The VS3 end of the power driving circuit 4400 is connected to the negative end of the high voltage area power supply of the WH driving circuit 4103 inside the power driving circuit 4400, and is connected to the emitter of the IGBT 4123, the anode of the FRD tube 4113, the collector of the W-phase lower arm IGBT 4126, the cathode of the FRD tube 4116, and the other end of the capacitor 4133 outside the power driving circuit 4400, and serves as the negative end WVS of the W-phase high voltage area power supply of the intelligent power module 4100.
An LO1 end of the power driving circuit 4400 is connected with the gate of the IGBT tube 4124, an LO2 end of the power driving circuit 4400 is connected with the gate of the IGBT tube 4125, and an LO3 end of the power driving circuit 4400 is connected with the gate of the IGBT tube 4126.
The emitter of the IGBT tube 4124 is connected to the anode of the FRD tube 4114 and serves as the U-phase low-voltage reference terminal UN of the intelligent power module 4100, the emitter of the IGBT tube 4125 is connected to the anode of the FRD tube 4115 and serves as the V-phase low-voltage reference terminal VN of the intelligent power module 4100, and the emitter of the IGBT tube 4126 is connected to the anode of the FRD tube 4116 and serves as the W-phase low-voltage reference terminal WN of the intelligent power module 4100.
The collector of the IGBT tube 4121, the cathode of the FRD tube 4111, the collector of the IGBT tube 4122, the cathode of the FRD tube 4112, the collector of the IGBT tube 4123, and the cathode of the FRD tube 4113 are connected to each other and serve as a high voltage input terminal P of the intelligent power module 4100, P is generally connected to 300V, UN, VN, and WN and is commonly connected to the ISO terminal of the intelligent power module 4100 at the same time, the power supply point serves as the voltage signal itrp terminal of the power driving circuit 4400, and the voltage signal itrp is connected to the input terminal of the current detecting circuit 4302 inside the power driving circuit 4400.
The power driver circuit 4400 functions as follows:
VDD is the positive terminal of the power supply of the power driving circuit 4400, and GND is the negative terminal of the power supply of the power driving circuit 4400; the VDD-GND voltage is generally 15V;
VB1 and VS1 are respectively the positive pole and the negative pole of a power supply of a U-phase high-voltage area, HO1 is the output end of the U-phase high-voltage area, VB2 and VS2 are respectively the positive pole and the negative pole of the power supply of the V-phase high-voltage area, HO2 is the output end of the V-phase high-voltage area, VB3 and VS3 are respectively the positive pole and the negative pole of the power supply of the U-phase high-voltage area, HO3 is the output end of the W-phase high-voltage area, and LO1, LO2 and LO3 are respectively the output ends of the U-phase, the V-phase and the W-phase.
The operation principle based on the circuits of fig. 4 and 6 is as follows:
when the load is driven by the intelligent power module 4100 to normally operate, the output currents of the U-phase low-voltage reference terminal UN, the V-phase low-voltage reference terminal VN and the W-phase low-voltage reference terminal WN are normal, at this time, the voltage of the output current on the sampling resistor 4301 is made normal, that is, the voltage of the voltage signal itrep is normal, therefore, the voltage of the itrep is smaller than the voltage of the first voltage source 4322, the output terminal of the voltage comparator 4312 is at a high level, the high level passes through the first not gate 4332, the delay circuit 4342 and the second not gate 4352, then the first output terminal OUT1 outputs a first output high-level signal, and the second output terminal OUT2 of the fifth not gate 4362 outputs a second low-level signal, at this time:
a first output end of the current detection circuit 4302 is at a high level, and a second output end of the current detection circuit 4302 is at a low level; the sixth not gate 4313 outputs a low level to an input terminal of the first and gate 4353, so that the first and gate 4353 outputs a low level to three or gates of the lower bridge overcurrent control circuit 4303, the seventh not gate 4314 outputs a high level to three and gates of the upper bridge overcurrent control circuit 4304, as is apparent from the logical relationship of the or gates and the and gates,
at this time, the level of the first output end of the lower bridge over-current control circuit 4303 is made to be consistent with the level of the first input end of the lower bridge over-current control circuit 4303, the level of the second output end of the lower bridge over-current control circuit 4303 is made to be consistent with the level of the second input end of the lower bridge over-current control circuit 4303, and the level of the third output end of the lower bridge over-current control circuit 4303 is made to be consistent with the level of the third input end of the lower bridge over-current control circuit 4303; the level of the first output end of the upper bridge over-current control circuit 4304 is made to be consistent with the level of the first input end of the upper bridge over-current control circuit 4304, the level of the second output end of the upper bridge over-current control circuit 4304 is made to be consistent with the level of the second input end of the upper bridge over-current control circuit 4304, and the level of the third output end of the upper bridge over-current control circuit 4304 is made to be consistent with the level of the third input end of the upper bridge over-current control circuit 4304.
Transmitting 0 or 5V logic input signals of input terminals HIN1, HIN2, HIN3 and LIN1, LIN2 and LIN3 to output terminals HO1, HO2, HO3 and LO1, LO2 and LO3 respectively, wherein HO1 is a logic output signal of VS1 or VS1+15V, HO2 is a logic output signal of VS2 or VS2+15V, HO3 is a logic output signal of VS3 or VS3+15V, and LO1, LO2 and LO3 are logic output signals of 0 or 15V;
note that input signals of the same phase cannot be high at the same time, that is, HIN1 and LIN1, HIN2 and LIN2, HIN3 and LIN3 cannot be high at the same time.
When the current value of the load driven by the intelligent power module 4100 is too large, the output currents of the U-phase low-voltage reference terminal UN, the V-phase low-voltage reference terminal VN and the W-phase low-voltage reference terminal WN are correspondingly increased, and at this time, the voltage of the output current on the sampling resistor 4301 is increased, that is, the voltage of the voltage signal ITRIP is increased, so that the voltage of the ITRIP is greater than the voltage of the first voltage source 4322, the output terminal of the voltage comparator 4312 is at a low level, and at this time:
after the delay circuit 4342 starts to operate, the low level signal output by the voltage comparator 4312 starts to discharge to the first capacitor 43422 after passing through the first not gate 4332 and the third not gate 43421, so that the voltage on the first capacitor 43422 gradually decreases, when the voltage decreases to the trigger voltage at the input end of the fourth not gate 43422, the output end of the fourth not gate 43422 outputs a high level signal, and outputs a first output low level signal through the first output end OUT1 after passing through the second not gate 4352, and outputs a second output high level signal through the second output end OUT2 of the fifth not gate 4362, at this time:
a first output terminal of the current detection circuit 4302 is at a low level, and a second output terminal of the current detection circuit 4302 is at a high level; the sixth not gate 4313 outputs a high level and the seventh not gate 4314 outputs a low level; the sixth not gate 4313 outputs a high level to one input terminal of the first and gate 4353, and the level of the other input terminal of the first and gate 4353 is related to the temperature detected by the second thermistor 4383, specifically, when the second thermistor 4383 can be an NTC, i.e. a negative temperature coefficient thermistor, or a PTC, i.e. a positive temperature coefficient thermistor, taking the second thermistor 4383 as an example, and when the temperature detected by the second thermistor 4383 is higher than a preset temperature value, the resistance thereof becomes smaller, and the voltage output from the second thermistor 4383 through the voltage dividing circuit connected in series with the first resistor 4393 to the inverting input terminal of the second comparator 4373 becomes higher, which is higher than the voltage of the second voltage source 4363 applied to the non-inverting input terminal of the second comparator 4373, so that the second comparator 4373 outputs a low level to the other input terminal of the first and gate 4353, thereby making the first and gate 4353 output a low level to the three or gates of the lower bridge control circuit 4303, and the seventh not gate 4314 outputs a low level to three and gates of the upper bridge over-current control circuit 4304, as is known from the logical relationship between the or gate and the and gate,
the levels of the output terminals of the first or gate 4343, the second or gate 4333 and the third or gate 4323 at this time coincide with LIN1, LIN2 and LIN3, respectively; at this time, no matter what levels the first input end, the second input end and the third input end of the upper bridge over-current control circuit 4304 are, the first output end, the second output end and the third output end of the upper bridge over-current control circuit 4304 are all low levels; since the upper bridge is all at a low level, the intelligent power module 4100 does not work at this time, and a discharge loop cannot be formed on the load;
when the temperature detected by the second thermistor 4383 is lower than the preset temperature value, the resistance value thereof is increased, and at this time, the voltage output by the second thermistor 4383 via the voltage divider circuit connected in series with the first resistor 4393 to the inverting input terminal of the second comparator 4373 is decreased and is lower than the voltage of the second voltage source 4363 loaded on the non-inverting input terminal of the second comparator 4373, so that the second comparator 4373 outputs a high level to the other input terminal of the first and gate 4353, and since one input terminal of the first and gate 4353 is a high level, the first and gate 4353 outputs a high level to three or gates of the lower bridge overcurrent control circuit 4303, which is known from the logical relationship of the or gates,
therefore, no matter what levels the first input end, the second input end and the third input end of the lower bridge over-current control circuit 4303 are, the first output end, the second output end and the third output end of the lower bridge over-current control circuit 4303 are all high levels;
because the high levels of the first output end, the second output end and the third output end of the lower bridge over-current control circuit 4303 enable the LO1, the LO2 and the LO3 to output high levels, the IGBT 4124, the IGBT 4125 and the IGBT 4126 are turned on to form an N discharge loop, that is, the induced charge of the load driven by the intelligent power module 4100 is rapidly discharged at this time;
the low level of the first output terminal, the second output terminal and the third output terminal of the upper bridge over-current control circuit 4304 enables HO1, HO2 and HO3 to output low level, so that the IGBT 4121, the IGBT 4122 and the IGBT 4123 are turned off.
Specifically, taking a 15A smart power module as an example, the sampling resistor 4301 may be designed to 33m Ω, and the voltage of the first voltage source 4322 may be designed to 0.5V, then:
when the current flowing through the sampling resistor 4301 is less than 15A, the voltage of ITRIP is less than the voltage of the first voltage source 4322;
when the current flowing through the sampling resistor 4301 is greater than 15A, the voltage of ITRIP is greater than the voltage of the first voltage source 4322.
The second thermistor 4383, i.e. NTC resistor, is designed to be 10k Ω at 75 ℃, then:
when the temperature of the second thermistor 4383 is higher than 75 ℃, the resistance value is greater than 10k Ω, and when the temperature of the second thermistor 4383 is lower than 75 ℃, the resistance value is less than 10k Ω;
the first resistor 4393 is designed to be 140k Ω, so that:
when the temperature of the second thermistor 4383 is higher than 75 ℃, the negative input terminal voltage of the second voltage comparator 4373 is >1V, and when the temperature of the second thermistor 4383 is lower than 75 ℃, the negative input terminal voltage of the second voltage comparator 4373 is < 1V;
when the second voltage source 4363 is designed to be 1V, then:
the second voltage comparator 4373 outputs a low level when the temperature of the second thermistor 4383 is higher than 75 deg.c, and the second voltage comparator 4373 outputs a high level when the temperature of the second thermistor 4383 is lower than 75 deg.c;
generally, when the smart power module 4100 operates, the temperature of the internal NTC resistor is 30 ℃ higher than the case temperature of the smart power module, and the case temperature of the smart power module operates 25 ℃ higher than the ambient temperature, so the internal NTC resistor is 55 ℃ higher than the gold temperature, according to the above design:
when the ambient temperature is lower than 20 ℃, that is, the temperature of the internal NTC resistor is lower than 75 ℃, and the voltage signal ITRIP is over-current, the intelligent power module 4100 of the present invention cannot continue to operate and the three phases of the lower bridge are all turned on, discharging the load,
when the ambient temperature is higher than 20 ℃, that is, the temperature of the internal NTC resistor is higher than 75 ℃, and the voltage signal ITRIP is over-current, the intelligent power module 4100 of the present invention cannot continue to operate but the three phases of the lower bridge do not discharge to the load.
It can be known from the above analysis that, when the intelligent power module 4100 drives the load to generate an overcurrent, the overcurrent detection circuit 4302 delays the time to output a protection control signal through the internal delay circuit 4342, and controls the three-phase upper bridge arm IGBT and the three-phase lower bridge arm IGBT to be turned off when the protection is generated, so that the filtering of noise is facilitated by the delay of the built-in sampling resistor 4301 in response to the overcurrent voltage signal ITRIP, and the unnecessary shutdown is reduced, and when the overcurrent is generated, the current detection circuit 4302 makes the input signals of the upper and lower bridges fail to be transmitted to the output end of the power driving circuit 4400, and makes the three output ends of the upper bridge of the power driving circuit 4400 be at a low level to turn off the three IGBT of the lower bridge, and further makes the three output ends of the lower bridge of the power driving circuit 4400 be at a high level to turn on the three IGBT of the lower bridge when the ambient temperature of the detection module is lower than a preset value, And three IGBT tubes of the lower bridge are conducted to form a discharge loop, so that residual charges of inductive loads are discharged at low temperature, the impact of the residual charges on the intelligent power module 4100 when the power is on again is avoided, the possibility of micro-damage to the intelligent power module is greatly reduced, the long-term reliability of the intelligent power module is improved, the risk of burning the intelligent power module during long-term working is reduced, and the device plays an important role in improving the safety and the robustness of a frequency conversion system and promoting the popularization and application of frequency conversion household appliances.
The IPM module 4100 of the embodiment of the invention is internally provided with the detection circuit 4302, the upper bridge over-current control circuit 4304 and the lower bridge over-current control circuit 4303, and the sampling resistor 4301 is internally arranged, so that when the intelligent power module 4100 drives a load to generate over-current, a voltage signal on the sampling resistor 4301 during over-current can be subjected to delay feedback, so that the filtering of voltage noise is realized, the accuracy of over-current detection is improved, the upper bridge over-current control circuit 4304 controls the three-phase upper bridge arm IGBT tubes to be all cut off during over-current, and when the over-current is generated and the environmental temperature is lower than a preset value, the lower bridge over-current control circuit 4303 controls the three-phase lower bridge arm IGBT tubes to be all conducted, so that induced charges generated by the load driven by the IPM module 4100 during over-current can be effectively discharged, thereby avoiding the impact of residual charges on the IGBT tubes, improving the reliability of the IPM module 4100, and in addition, the induced charges generated by the load can be discharged under the, therefore, the phenomenon that the temperature of the IGBT tube inside the module is too high to dissipate heat in time when the inductive charge of the load is discharged when the environmental temperature is high is avoided, and the effect of protecting the IGBT tube is achieved.
The invention also provides an air conditioner controller, which is used for realizing the control of the air conditioner in relative charge, in particular to a variable frequency air conditioner, the air conditioner controller can be divided into controllers of an indoor unit part and an outdoor unit part, the indoor unit controller realizes the driving of the running of loads such as an indoor unit fan motor, an air guide strip and the like, the outdoor unit controller realizes the driving of the running of loads such as a compressor, an outdoor fan motor, a four-way valve and the like, wherein the outdoor controller comprises the IPM module for driving the running of the compressor, if the outdoor fan motor is a direct current fan, the interior of the outdoor controller also comprises the IPM module for driving the direct current fan, and if the indoor fan motor is a direct current fan, the interior of the indoor controller also comprises the IPM module for driving the direct current fan. For specific implementation and effects of the IPM module, reference may be made to the above embodiments, which are not described herein again.
The invention also provides an air conditioner, which comprises the air conditioner controller.
In the description herein, references to the description of the terms "first embodiment," "second embodiment," "example," etc., mean that a particular method, apparatus, or feature described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, methods, apparatuses, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (9)
1. An intelligent power module comprises a three-phase upper bridge arm IGBT tube, a three-phase lower bridge arm IGBT tube, a driving circuit corresponding to each IGBT tube in the three-phase upper bridge arm IGBT tube and the three-phase lower bridge arm IGBT tube, and a bridge arm control signal input end, and is characterized by further comprising an overcurrent detection circuit, an upper bridge overcurrent control circuit and a lower bridge overcurrent control circuit;
the first output end of the over-current detection circuit is connected with the control end of the upper bridge over-current control circuit, the second output end of the over-current detection circuit is connected with the control end of the lower bridge over-current control circuit, three output ends of the upper bridge over-current control circuit are respectively connected with the driving circuits corresponding to the three-phase upper bridge arm IGBT tubes, three output ends of the lower bridge over-current control circuit are respectively connected with the driving circuits corresponding to the three-phase lower bridge arm IGBT tubes, and three input ends of the upper bridge over-current control circuit and the lower bridge over-current control circuit are respectively connected with the corresponding bridge arm control signal input ends;
the over-current detection circuit is used for detecting the current value of the intelligent power module driving load, when the current value is larger than a preset current threshold value, the over-current detection circuit outputs a protection signal to the upper bridge over-current control circuit and the lower bridge over-current control circuit so as to disconnect the bridge arm control signal input end corresponding to the corresponding IGBT tube from the driving circuit and control the three-phase upper bridge arm IGBT tube to be cut off, and simultaneously controls the three-phase lower bridge arm IGBT tube to be conducted when the ambient temperature is lower than a preset temperature value so as to discharge the induced charge of the intelligent power module driving load;
the lower bridge overcurrent control circuit comprises a sixth NOT gate, a first resistor, a second thermistor, a second comparator, a first AND gate, a second voltage source, a first OR gate, a second OR gate and a third OR gate;
one end of the second thermistor is connected with the anode of a low-voltage power supply of the intelligent power module, the common junction of the other end of the second thermistor and one end of the first resistor is connected with the inverting input end of the second comparator, the other end of the first resistor and one end of the second voltage source are connected to the ground in a common mode, and the other end of the second voltage source is connected with the non-inverting input end of the second comparator;
the input end of the sixth not gate is the control end of the lower bridge over-current control circuit, the output end of the sixth not gate is connected with one input end of the first and gate, and the output end of the second comparator is connected with the other input end of the first and gate;
the output end of the first AND gate is respectively connected with one input end of the first OR gate, the second OR gate and the third OR gate in a common mode, the other input ends of the first OR gate, the second OR gate and the third OR gate form three input ends of the lower bridge over-current control circuit, and the output ends of the first OR gate, the second OR gate and the third OR gate form three output ends of the lower bridge over-current control circuit.
2. The smart power module of claim 1 wherein the over-current detection circuit comprises a comparison module, a delay module, and an output module;
the input end of the comparison module is the input end of the over-current detection circuit, the output end of the comparison module is connected with the input end of the delay module, the output end of the delay module is connected with the output module, and the two output ends of the output module are the output ends of the over-current detection circuit;
the input end of the comparison module is used for detecting an input voltage signal of the intelligent power module driving load current value, comparing the voltage signal with a preset voltage value, outputting an overcurrent signal to the delay module when the voltage signal exceeds the preset voltage value, delaying the overcurrent signal by the delay module and inputting the delayed overcurrent signal to the output module, and performing level conversion by the output module to output two paths of protection signals to the upper bridge overcurrent control circuit and the lower bridge overcurrent control circuit.
3. The smart power module of claim 2 wherein the comparison module comprises a comparator, a first voltage source;
one end of the first voltage source is grounded, the other end of the first voltage source is connected with the non-inverting input end of the comparison module, and the inverting input end of the comparison module is the input end of the comparison module.
4. The smart power module of claim 2 wherein the delay module comprises a delay circuit, a first not gate and a second not gate;
the input end of the first not gate is the input end of the delay module, and the output end of the first not gate is connected with the input end of the delay circuit;
the output end of the delay circuit is connected with the input end of the second not gate, and the output end of the second not gate is the output end of the delay module.
5. The smart power module of claim 4, wherein the delay circuit comprises a third not gate, a fourth not gate, and a first capacitor;
the input end of the third not gate is the input end of the delay circuit, the output end of the third not gate and one end of the first capacitor are connected to the input end of the fourth not gate in a shared mode, and the output end of the fourth not gate is the output end of the delay circuit.
6. The smart power module of claim 2, wherein the output module comprises a fifth not gate;
the first output end of the output module and the input end of the output module are connected to the input end of the fifth not gate in a shared mode, and the output end of the fifth not gate is the second output end of the output module.
7. The smart power module of claim 1, wherein the upper bridge over-current control circuit comprises a seventh not gate, a second and gate, a third and gate, and a fourth and gate;
the input end of the seventh not gate is the control end of the upper bridge over-current control circuit, the output end of the seventh not gate is respectively connected with one input end of the second and gate, one input end of the third and gate and one input end of the fourth and gate, the other input ends of the second and gate, the third and gate and the fourth and gate form three input ends of the upper bridge over-current control circuit, and the output ends of the second and gate, the third and gate and the fourth and gate form three output ends of the upper bridge over-current control circuit.
8. An air conditioner controller comprising the smart power module of any one of claims 1 to 7.
9. An air conditioner comprising the air conditioner controller as claimed in claim 8.
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| CN109510562A (en) * | 2019-01-02 | 2019-03-22 | 广东美的暖通设备有限公司 | Power module, air conditioner |
| CN110707664B (en) * | 2019-10-30 | 2020-10-02 | 珠海格力电器股份有限公司 | IPM protection detection circuit |
| CN112731249B (en) * | 2020-12-30 | 2022-11-01 | 海信冰箱有限公司 | Electronic device and detection method |
| CN112994424B (en) * | 2021-03-29 | 2024-04-09 | 广东汇芯半导体有限公司 | Intelligent dual-drive IPM variable frequency controller and air conditioner |
| CN113341298B (en) * | 2021-06-01 | 2024-04-02 | 广东汇芯半导体有限公司 | Semiconductor circuit testing method, semiconductor circuit testing device, electronic equipment and computer storage medium |
| CN117220250B (en) * | 2023-11-09 | 2024-03-01 | 浙江地芯引力科技有限公司 | Power protection circuit, chip and data line |
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