CN107492876A

CN107492876A - SPM and controller of air conditioner

Info

Publication number: CN107492876A
Application number: CN201710816079.9A
Authority: CN
Inventors: 冯宇翔
Original assignee: Guangdong Midea Refrigeration Equipment Co Ltd
Current assignee: GD Midea Air Conditioning Equipment Co Ltd
Priority date: 2017-09-11
Filing date: 2017-09-11
Publication date: 2017-12-19
Anticipated expiration: 2037-09-11
Also published as: CN107492876B

Abstract

The invention provides a kind of SPM and controller of air conditioner, by increasing an adjustment circuit between each drive circuit internally and corresponding IGBT pipes, the adjustment circuit can detect the change of SPM low-pressure area voltage value in real time, and its low-voltage power supply fluctuation cause magnitude of voltage it is too low make module stop export so that cause the energy storage of motor cause inside modules IGBT pipes savings electric charge when, the electric charge that can be put aside to inside modules IGBT pipes is released, and cause when supply voltage recovers normal work, a suitable time is selected to continue completely to release above-mentioned electric charge by timing, to avoid impact of its electric charge on inside modules circuit from influenceing the reliability of its work.

Description

Intelligent power module and air conditioner controller

Technical Field

The invention relates to the technical field of intelligent power modules, in particular to an intelligent power module and an air conditioner controller.

Background

An intelligent Power module, i.e., 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. In practical applications, the IPM module 100 has a severe working environment and unstable power supply, the sudden power down may be caused by a voltage fluctuation of the low voltage power supply of the IPM module 100 or the like, the IPM module 100 abruptly stops outputting, and an induced electromotive force is generated due to the inductive energy storage of the motor 139, the induced electromotive force is transmitted to the IPM module 100, so that the IGBT tube therein accumulates charges, cannot be discharged in time within a short time, and if the IPM module 100 resumes normal operation when the power supply is restored to steady, the residual charge on the IGBT tube inside the IPM module may discharge to the IPM module 100 in the next normal switching cycle, which affects the effective driving of the load motor by the IPM module, and unnecessary charge impact is possibly formed on the internal circuit of the IPM module, the long-term reliability of the IPM module is influenced, and the large-area popularization of the intelligent power module in the field of frequency conversion is hindered.

Disclosure of Invention

The invention mainly aims to provide an intelligent power module and an air conditioner controller, and aims to solve the problems that the effective driving of a motor is influenced and the working reliability of the module is influenced due to the fact that the electric charge accumulated in an IGBT (insulated gate bipolar transistor) tube in the intelligent power module cannot be discharged in a short time because of the instability of a power supply in the working process of the intelligent power module and the impact is generated on the 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 and an adjusting circuit, wherein the driving circuit and the adjusting circuit correspond to each IGBT tube in the three-phase upper bridge arm IGBT tube and the three-phase lower bridge arm IGBT tube;

the output end of each driving circuit is connected with the signal input end of each corresponding adjusting circuit, and the signal output end of each adjusting circuit is connected with the grid electrode of each corresponding IGBT;

the positive electrode and the negative electrode of the power supply end of the adjusting circuit corresponding to each IGBT tube of the three-phase upper bridge arm are respectively connected with the positive electrode and the negative electrode of the power supply of the high-voltage area of the corresponding phase; the positive electrode and the negative electrode of the power supply end of the adjusting circuit corresponding to each IGBT tube of the three-phase lower bridge arm are respectively connected with the positive electrode and the negative electrode of the low-voltage power supply of the intelligent power module; wherein,

the adjusting circuit is used for detecting the voltage value of a power supply end of the adjusting circuit, when the voltage value is smaller than a preset voltage threshold value, the adjusting circuit cuts off a driving signal output by the driving circuit to the corresponding IGBT tube and starts timing, and when the timing time does not reach a preset target time and the voltage value is larger than or equal to the preset voltage threshold value, the adjusting circuit discharges the charges of the corresponding IGBT tube; and when the timing time reaches the preset target time, controlling the driving circuit to output a driving signal to the corresponding IGBT tube.

In one possible design, each of the adjusting circuits includes a voltage detecting module, a counting module, an output module, and a first switch;

the input end of the voltage detection module, the power end of the counting module and the power end of the output module are interconnected to form a power end of the adjusting circuit; the output end of the voltage detection module is respectively connected with the input end of the counting module and the control end of the first switch; the output end of the counting module is connected with the control end of the output module; the input end of the output module is the signal input end of the adjusting circuit, the output end of the output module is connected with the input end of the first switch, and the output end of the first switch is the signal output end of the adjusting circuit; wherein,

the voltage detection module is used for controlling the counting module to start timing and controlling the first switch to be switched from on to off in normal working when detecting that the voltage value of the input end of the adjusting circuit is smaller than a preset voltage threshold;

the counting module is used for outputting a first trigger signal to control the output module to output a low-resistance state when the timing is started;

when the timing time does not reach the preset target time and the voltage value is greater than or equal to the preset voltage threshold value, the low-resistance state output by the output module discharges the charges corresponding to the IGBT tube; when the timing time reaches the preset target time, the counting module outputs a second trigger signal to control the driving circuit to output a driving signal to the corresponding IGBT tube.

In one possible design, the counting module includes a first not gate and a counter;

the input end of the first not gate is the input end of the counting module, the output end of the first not gate is connected with the input end of the counter, and the output end of the counter is the output end of the counting module.

In one possible design, the voltage detection module includes a comparator, a voltage source;

the in-phase end of the comparator is connected with the positive electrode of the power end of the adjusting circuit, the positive electrode of the voltage source is connected with the reverse-phase end of the comparator, and the negative electrode of the voltage source is connected with the negative electrode of the power end of the adjusting circuit.

In one possible design, the output module comprises a second switch, a third switch, a first PMOS transistor and a second NMOS transistor;

the input end of the second switch, the first selection end of the third switch and the source electrode of the first PMOS tube are respectively connected with the positive electrode of the power end of the regulating circuit, and the output end of the second switch is connected with the control end of the third switch;

the second selection end of the third switch is connected with the grid electrode of the first PMOS tube, the fixed end of the third switch is connected with the grid electrode of the second NMOS tube, the connecting end of the drain electrode of the first PMOS tube and the drain electrode of the second NMOS tube is the output end of the output module, and the source electrode of the second NMOS tube is connected with the negative electrode of the power end of the adjusting circuit.

In one possible design, the output module further includes a shaping unit;

the output end of the second switch is connected with the input end of the shaping unit, the output end of the shaping unit is the control end of the third switch, and the shaping unit shapes the control signal output by the second switch and outputs the control signal to the control end of the third switch.

In one possible design, the shaping unit includes a first not gate and a second not gate;

the input end of the first not gate is the input end of the shaping unit, the output end of the first not gate 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 shaping unit.

In one possible design, each of the adjusting circuits further includes a shaping and amplifying module:

the input end of the shaping amplification module is connected with the input end of the adjusting circuit, the output end of the shaping amplification module is connected with the input end of the output module, and the shaping amplification module amplifies and shapes the signal at the input end of the adjusting circuit and outputs the signal to the input end of the output module.

In one possible design, the shaping amplification module includes a third not gate and a fourth not gate;

the input end of the third not gate is the input end of the shaping amplification module, the output end of the third not gate is connected with the input end of the fourth not gate, and the output end of the fourth not gate is the output end of the shaping amplification module.

In one possible design, the size of the MOS transistor in the third not gate is 1/2 of the size of the MOS transistor in the fourth not gate.

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.

The intelligent power module provided by the invention adds an adjusting circuit between each driving circuit in the intelligent power module and the corresponding IGBT tube, the adjusting circuit can detect the change of the power supply voltage value of the IPM module in real time, and can cut off the driving signal of the driving output and the IGBT tube when the voltage value is too low due to the fluctuation of the low-voltage power supply to stop the output of the module and further to accumulate the charge in the IGBT tube in the module due to the energy storage of the driving motor, so that the charge accumulated in the IGBT tube is naturally discharged, at this moment, the adjusting circuit starts to time, then when the low-voltage power supply recovers to normal, if the voltage value is reduced to the recovery time and exceeds the target time, the driving signal output by the driving circuit is directly controlled to the corresponding IGBT tube, and if the time for the voltage value to be recovered is shorter than the target time, outputting a low-resistance state within the residual time from the timing of the voltage recovery to the target time, and further quickly discharging the charge accumulated in the IGBT tube. The device has the advantages that the accumulated charges in the IGBT can be discharged quickly, the recovery time of the IPM module in low-voltage power supply voltage fluctuation can be shortened, the module can quickly recover to work normally, the motor is driven effectively, and meanwhile, the phenomenon that the impact of the accumulated charges on the module affects the working reliability of the module is avoided.

Drawings

FIG. 1 is a schematic diagram of a prior art circuit configuration of an intelligent power module;

FIG. 2 is a circuit diagram of the actual operation of a prior art smart power module;

FIG. 3 is a schematic circuit diagram of an intelligent power module according to the present invention;

fig. 4 is a schematic diagram of a specific circuit structure of the output adjustment circuit in fig. 3.

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 arm IGBT tube, a three-phase lower arm IGBT tube, and a driving circuit and an adjusting circuit corresponding to each of the three-phase upper arm IGBT tube and the three-phase lower arm IGBT tube;

the positive electrode and the negative electrode of the power supply end of the adjusting circuit corresponding to each IGBT tube of the three-phase upper bridge arm are respectively connected with the positive electrode and the negative electrode of the power supply of the high-voltage area of the corresponding phase; the positive electrode and the negative electrode of the power supply end of the adjusting circuit corresponding to each IGBT tube of the three-phase lower bridge arm are respectively connected with the positive electrode and the negative electrode of the low-voltage power supply of the intelligent power module 4100; wherein,

the adjusting circuit is used for detecting the voltage value of a power supply end of the adjusting circuit, cutting off a driving signal output to the corresponding IGBT tube by the driving circuit and starting timing when the voltage value is smaller than a preset threshold value, and discharging the charge of the corresponding IGBT tube by the adjusting circuit when the timing time does not reach the preset target time and the voltage value is larger than or equal to the preset threshold value; and when the timing time reaches the preset target time, controlling the driving circuit to output a driving signal to the corresponding IGBT tube.

In this embodiment, the three-phase upper arm IGBT tube is a U-phase upper arm IGBT tube 4121, a V-phase upper arm IGBT tube 4122, and a W-phase upper arm IGBT tube 4123, and the three-phase lower arm IGBT tube is a U-phase lower arm IGBT tube 4124, a V-phase lower arm IGBT tube 4125, and a W-phase lower arm IGBT tube 4126, and these six IGBT tubes respectively constitute power circuits corresponding to the three-phase upper arm and the three-phase lower arm of the IPM module, and provide corresponding three-phase current and voltage for the IPM module to drive the load motor.

In this embodiment, the driving circuit and the adjusting circuit corresponding to each of the three-phase upper arm IGBT tube and the three-phase lower arm IGBT tube are respectively:

a UH output adjusting circuit 14A connected with the U-phase upper bridge arm IGBT tube 4121, and a UH driving circuit 14 connected with the UH output adjusting circuit 14A;

a VH output adjustment circuit 24A connected to the V-phase upper arm IGBT tube 4122, a VH drive circuit 24 connected to the VH output adjustment circuit 24A;

a WH output adjusting circuit 34A connected to the W-phase upper arm IGBT tube 4123, a WH drive circuit 34 connected to the WH output adjusting circuit 34A;

a UL output adjusting circuit 44A connected to the U-phase lower arm IGBT tube 4124, and a UL driving circuit 44 connected to the UL output adjusting circuit 44A;

a WL output regulator circuit 54A connected to the W-phase lower arm IGBT tube 4125, a WL driver circuit 54 connected to the WL output regulator circuit 54A;

a VL output adjusting circuit 64A connected to the V-phase lower arm IGBT tube 4126, and a VL drive circuit 64 connected to the VL output adjusting circuit 64A;

in this embodiment, the six driving circuits and the adjusting circuits are integrated in the HVIC transistor 4400, in practical application, the six driving circuits and the adjusting circuits may also exist independently, or the three driving circuits and the adjusting circuits corresponding to the upper bridge arm are integrated in the HVIC transistor, and the three driving circuits and the adjusting circuits corresponding to the lower bridge arm are integrated in an LVIC transistor (Low voltage integrated Circuit chip), and the specific arrangement manner may be different according to the internal structure manner of the IPM module.

In this embodiment, the power supply positive terminal VCC of the HVIC tube 4400 is used as the low-voltage area power supply positive terminal VDD of the intelligent power module 4100, VDD is generally 15V, the power supply negative terminal GND of the HVIC tube 4400 is used as the low-voltage area power supply negative terminal COM of the intelligent power module 4100, and the corresponding high-voltage area power supply forms a high voltage due to the connection with the dc bus voltage, for example, the dc bus voltage is connected to about 300V through the P terminal;

a first input terminal HIN1 of the HVIC tube 4400 serves as an input terminal UHIN of a U-phase upper bridge arm of the intelligent power module 4100 and is connected with an input terminal of the UH driving circuit 14;

a second input terminal HIN2 of the HVIC tube 4400 serves as a V-phase upper bridge arm input terminal VHIN of the intelligent power module 4100 and is connected with the input terminal of the VH driving circuit 24;

a third input terminal HIN3 of the HVIC tube 4400 serves as a W-phase upper bridge arm input terminal WHIN of the intelligent power module 4100 and is connected with the input terminal of the WH driving circuit 34;

a fourth input terminal LIN1 of the HVIC tube 4400 serves as an input terminal ULINs of the U-phase lower bridge arm of the intelligent power module 4100 and is connected with the input terminal of the UL driving circuit 44;

a fifth input terminal LIN2 of the HVIC tube 4400 serves as a V-phase lower bridge arm input terminal VLIN of the intelligent power module 4100 and is connected with the input terminal of the VL drive circuit 54;

a sixth input terminal LIN3 of the HVIC 4400 is used as a W-phase lower bridge arm input terminal WLIN of the intelligent power module 4100 and is connected with the input terminal of the WL driving circuit 64;

the power supplies of the UL driver circuit 44, the WL driver circuit 54, and the VL driver circuit 64 are low-voltage power supplies of the intelligent power module 4100, and the power supply input of the output adjusting circuit 54A, VL of the UL output adjusting circuit 44A, WL output adjusting circuit 64A is the same as that of the low-voltage power supplies of the intelligent power module 4100;

the UH drive circuit 14, the VH drive circuit 24, and the WH drive circuit 34 have two sets of power supply inputs, one is a low-voltage region power supply of the intelligent power module 4100, and the other is a high-voltage region power supply of the corresponding phase, and the UH output adjustment circuit 14A, VH outputs the power supply input of the adjustment circuit 24A, WH output adjustment circuit 34A to be the same as the high-voltage region power supply of the drive circuit connected correspondingly, that is, the power supply inputs of the UH drive circuit 14 and the UH output adjustment circuit 14A are U-phase high-voltage power supplies UVB and UVS; the power supply inputs of the VH drive circuit 24 and the VH output adjustment circuit 24A are a V-phase high-voltage power supply VVB and VVS; the power supply inputs of the WH driving circuit 34 and the WH output adjusting circuit 34A are V-phase high-voltage power supply sources WVB and WVS.

In this embodiment, the dc bus voltage input end P of the IPM module 4100 is connected to the collector electrodes of the six IGBT tubes, and UN, VN and WN are the emitter output ends of the three lower arm IGBT tubes, respectively, and the IPM module 4100 further includes three bootstrap capacitors 4133, 4132 and 4131, which are connected in parallel to the power supply ends of the corresponding high voltage regions, respectively.

In the normal working process of the IPM module 4100, only one of the input signals of the upper bridge arm and the lower bridge arm which are in the same phase in the six input signals of UHIN, VHIN, WHIN, ULIN, VLIN and WLIN can be at a high level, and the other input signal must be at a low level, that is, only one of UHIN and ULIN can be at a high level, only one of VHIN and VLIN can be at a high level, and only one of WHIN and WLIN can be at a high level.

Taking U-phase upper and lower bridge arm input signals UHIN, ULIN as an example, when UHIN inputs a low level, the ULIN must input a high level, at this time, UHIN is input to the gate of the U-phase upper bridge arm IGBT 4121 through the UH driving circuit 14 and the UH output adjusting circuit 14A to turn off the UHIN, and the ULIN is input to the gate of the U-phase lower bridge arm IGBT 4124 through the UL driving circuit 44 and the UL output adjusting circuit 44A to turn on the U-phase lower bridge arm IGBT 4124, at this time, the low-voltage region power supply VDD of the IPM module 4100 charges the bootstrap capacitor 4133 through the bootstrap circuit inside the UH driving circuit 14, and the low-voltage region power supply VDD reaches the negative terminal COM of the low-voltage region power supply through the capacitor bootstrap IGBT 4133 and the U-phase lower bridge arm IGBT 4124, and after a sufficient time, the voltage of the two ends of the capacitor approaches the voltage region, that is 15V, that is, at this time, the voltage of the U-phase high-voltage power; when UHIN inputs a high level and ULin must input a low level, the U-phase upper arm IGBT tube 4121 is turned on, the U-phase lower arm IGBT tube 4124 is turned off, and at the moment, the direct-current bus voltage reaches UVS close to 300V through the P end and the U-phase upper arm IGBT tube 4121, and the UVB end of the bootstrap capacitor 4133 is lifted to be close to 315V due to the fact that voltage close to 15V is already arranged at the two ends of the bootstrap capacitor 4133. Therefore, the voltages of the U-phase high-voltage power supply UVB and UVS vary with the difference of the U-phase upper and lower bridge arm input signals UHIN and ULIN, and if the high-level signal input by the U-phase upper bridge arm is relatively short and the electric quantity stored in the bootstrap capacitor 4133 is relatively large, the voltage of the UVB with respect to the UVS can be maintained above 14V, that is, the voltage of the UH output adjusting circuit 14A and the input power of the UH driving circuit 14 in the high-voltage region can be maintained above 14V.

Similarly, the input power of the high-voltage area of other phases can also be kept above 14V.

In this embodiment, each of the adjusting circuits includes a voltage detecting module, a counting module, an output module, and a first switch, and taking the UH output adjusting circuit 14A as an example, as shown in fig. 4, the UH output adjusting circuit 14A includes a voltage detecting module 10, a counting module 20, an output module 30, and a first switch 5001.

An input end IN of the adjusting circuit is connected with a second selection end of the second switch 5007;

the input end of the voltage detection module 10, the power end of the counting module 20 and the power end of the output module 30 are interconnected to form a power end of the adjusting circuit 14A; the output end of the voltage detection module 10 is connected to the input end of the counting module 20 and the control end of the first switch 5001 respectively; the output end of the counting module 20 is connected with the control end of the output module 30; the input end of the output module 30 is a signal input end of the adjusting circuit 14A, the output end of the output module 30 is connected to the input end of the first switch 5001, and the output end of the first switch 5001 is a signal output end of the adjusting circuit 14A; wherein,

the voltage detection module 10 is configured to control the counting module 20 to start timing and control the first switch to be turned off from on during normal operation when detecting that the voltage value at the input end of the adjustment circuit 14A is smaller than a preset threshold;

the counting module 20 is configured to output a first trigger signal to control the output module 30 to output a low impedance state when the timer starts;

when the timing time does not reach the preset target time and the voltage value is greater than or equal to the preset threshold value, the low resistance state output by the output module 30 discharges the charges corresponding to the IGBT tube; when the timing time reaches the preset target time, the counting module 20 outputs a second trigger signal to control the driving circuit to output a driving signal to the corresponding IGBT tube.

Specifically, the voltage detection module 10 includes a comparator 5009 and a voltage source 5008;

the in-phase terminal of the comparator 5009 is connected to the positive terminal of the power supply terminal of the regulation circuit, the positive terminal of the voltage source 5008 is connected to the inverting terminal of the comparator 5009, and the negative terminal of the voltage source 5008 is connected to the negative terminal of the power supply terminal of the regulation circuit.

The counting module 10 includes a first not gate 5012 and a counter 5002;

the input end of the first not gate 5012 is the input end of the counting module 10, the output end of the first not gate 5012 is connected to the input end of the counter 5002, and the output end of the counter 5002 is the output end of the counting module 10.

The output module 30 includes a second switch 5011, a third switch 5007, a first PMOS transistor 5003 and a second NMOS transistor 5004;

the input end of the second switch 5011, the first selection end of the third switch 5007 and the source of the first PMOS transistor 5003 are respectively connected with the positive electrode of a power supply terminal VB1 of the adjusting circuit 14A, and the output end of the second switch 5011 is connected with the control end of the third switch 5007;

a second selection end of the third switch 5007 is connected to the gate of the first PMOS transistor 5003, a fixed end of the third switch 5007 is connected to the gate of the second NMOS transistor 5004, a connection end between the drain of the first PMOS transistor 5003 and the drain of the second NMOS transistor 5004 is an output end of the output module 30, and a source of the second NMOS transistor 5004 is connected to the negative electrode VS1 of the power supply end of the adjusting circuit 14A.

It is worth noting that the first switch 5001, the second switch 5011, and the third switch 5007 may be analog electronic switches.

The operating principle of the adjusting circuit of the embodiment is as follows: in the normal working process of the IPM module 4100, six input signals can be driven and amplified by the corresponding driving circuit and then input to the gate of the IGBT of the corresponding bridge arm through the adjusting circuit to control the switching state of the gate, and finally output corresponding three-phase driving signals to drive the normal operation of the motor, because the operating environment of the IPM module 4100 is relatively bad and the power supply is unstable, the low-voltage power supply, namely VDD, of the IPM module 4100 can fluctuate, so that VDD is lower than the under-voltage protection value of the IPM module 4100, the driving module cannot normally work to turn off the output driving signals, and further the IPM module 4100 stops outputting suddenly, because the driving motor is an inductive load, the internal winding of the driving motor can store energy to generate induced electromotive force, which can be conducted to the IPM module 4100, and further charge is accumulated on the IGBT of the PM module 4100, at this time, the output adjusting circuit connected with the IGBT starts to play a role in discharging the charge on the IGBT, specifically as follows:

when the voltage detection module 10 detects that the voltage value at the input end of the adjustment circuit is smaller than the preset voltage threshold, specifically, when the voltage value at the non-inverting end of the comparator 5009 is smaller than the voltage value of the voltage source 5008 connected to the inverting end, the voltage detection module 10 outputs a control signal, i.e., a low level signal, to the control end of the first switch 5001 and the counting module 20 through the output end of the comparator 5009, so as to control the first switch 5001 to be turned off from on during normal operation.

When the first switch 5001 is turned off, the output end of the output module 30 is disconnected from the output end OUT of the adjusting circuit, and at this time, the adjusting circuit cuts off the driving signal output by the driving circuit to the corresponding IGBT, that is, the output end OUT of the adjusting circuit is turned off, and at this time, the accumulated electric charge on the IGBT performs natural discharge.

When the input terminal of the counting module 20 changes to a low level, the first not gate 5012 of the counting module 20 changes to a high level through phase reversal, and at this time, the level of the input terminal of the counter 5002 changes from a low level to a high level, so that the counter 5002 starts counting, and at the same time, the counter 5002 outputs a first trigger signal changing to a low level, so that the second switch 5011 is turned off, and further the control terminal of the third switch 5007 also changes from being connected with the second selection terminal to being connected with the first selection terminal, and at this time, the positive terminal of the power supply of the adjusting circuit is loaded on the gate of the second NMOS transistor 5004 of the output module 30, so that the second NMOS transistor 5004 is turned on.

When the voltage detection module 10 detects that the voltage value at the input end of the adjustment circuit rises, so that the voltage value is greater than or equal to the preset voltage threshold, specifically, when the voltage of the non-inverting terminal of the comparator 5009 is greater than or equal to the voltage value of the voltage source 5008 connected to the inverting terminal, the voltage detection module 10 outputs a control signal, i.e., a high level signal, to the control terminal of the first switch 5001 and the counting module 20 through the output end of the comparator 5009, so as to control the first switch 5001 to be turned on from off.

When the first switch 5001 is turned on, there are two states according to the timing of the counting module 20 at this time:

if the counter 5002 of the counting module 20 does not count for the preset target time, for example, 1024us, the output terminal of the counter 5002 keeps the first level state at this time, the state of the third switch 5007 is unchanged, and since the second NMOS transistor 5004 is already in the conducting state, the output of the output module 30 is in the low-resistance state at this time, the accumulated charge on the IGBT transistor is further discharged through the second NMOS transistor 5004, and the speed of discharging the charge is faster than the previous natural discharge.

If the time counted by the counter 5002 of the counting module 20 reaches the preset target time, for example, 1024us, the counter 5002 counts time and finishes outputting the high-level second trigger signal, so that the second switch 5011 is turned on, and further, the control terminal of the third switch 5007 is also changed from being connected with the first selection terminal to being connected with the second selection terminal, at this time, the driving signal output by the driving circuit is output to the corresponding IGBT through the output module 30 and the first switch 5001, that is, the input terminal IN of the adjusting circuit can be normally output to the output terminal OUT, that is, the IPM module 4100 recovers to the normal operating state.

When the voltage value at the input end of the regulating circuit recovers after dropping, the time for further discharging the accumulated charge on the IGBT through the output module 30 depends on the length relationship between the time for the voltage value to drop to recover and the timing time of the counting module 20. If the voltage value drops to the recovery time for a longer time and exceeds the timing time of the counting module 20, the accumulated charge on the IGBT tube is completely discharged after natural discharge, so that when the voltage rises to recover, the output module directly drives the driving signal output by the circuit to output to the corresponding IGBT tube through the first switch 5001, and further discharge through the low-resistance state of the output module is not required. If the time of the voltage value falling to the recovery is short and is less than the timing time of the counting module 20, when the voltage rises to the recovery, the accumulated charge on the IGBT may not be completely discharged naturally in the previous step, and further discharge in the low resistance state of the output module is required, and if the timing time of the counting module 20 is 1024us, the time that the counting module 20 has timed when the voltage rises to the recovery is TM. Its further bleeding time TT is calculated as follows:

TT＝1024-TM

the time TT ensures that the charge accumulated on the IGBT tube is further discharged completely after the last step of natural discharge.

The IPM module 4100 of the embodiment of the present invention adds an adjusting circuit between each driving circuit inside and the corresponding IGBT, the regulation circuit can detect the variation of the power supply voltage value of the IPM module 4100 in real time, when the voltage value is too low due to the fluctuation of the low-voltage power supply to stop the output of the module so as to cause the energy storage of the driving motor to cause the IGBT tube in the module to accumulate charges, the driving output and the driving signal of the IGBT tube can be cut off firstly, so that the charge accumulated in the IGBT tube is naturally discharged, at this moment, the adjusting circuit starts to time, then when the low-voltage power supply recovers to normal, if the voltage value is reduced to the recovery time and exceeds the target time, the driving signal output by the driving circuit is directly controlled to the corresponding IGBT tube, and if the time for the voltage value to be recovered is shorter than the target time, outputting a low-resistance state within the residual time from the timing of the voltage recovery to the target time, and further quickly discharging the charge accumulated in the IGBT tube. The method ensures that the accumulated charges in the IGBT can be discharged quickly, and can shorten the recovery time of the IPM module 4100 when the low-voltage power supply voltage fluctuates, so that the module can recover normal operation quickly, and meanwhile, the influence of the impact of the accumulated charges on the module on the operational reliability of the module is avoided.

Further, based on the first embodiment of the intelligent power module of the present invention, in the second embodiment of the intelligent power module of the air conditioner of the present invention, as shown in fig. 4, each adjusting circuit further includes a shaping amplifying module, taking the UH output adjusting circuit 14A as an example, the UH output adjusting circuit 14A further includes a shaping amplifying module 40:

the input end of the shaping amplifying module 40 is connected to the input end of the adjusting circuit 14A, the output end of the shaping amplifying module 40 is connected to the input end of the output module 30, and the shaping amplifying module 40 amplifies and shapes the signal at the input end of the adjusting circuit and outputs the signal to the input end of the output module 30.

Specifically, the shaping amplifying module 40 includes a third not gate 5005 and a fourth not gate 5006;

the input of the third not gate 5005 is the input of the shaping amplifying module 40, the output of the third not gate 5005 is connected to the input of the fourth not gate 5006, and the output of the fourth not gate 5006 is the output of the shaping amplifying module 40.

IN the normal operation process of the IPM module 4100, an input signal at the input terminal IN of the adjustment circuit is amplified and shaped by the third not gate 5005 and the fourth not gate 5006, and then is output after being power-driven by the first PMOS transistor 5003 and the second NMOS transistor 5004 of the output module 30.

Further, the MOS transistors forming the third not gate 5005 and the fourth not gate 5006 may have different sizes, and the MOS transistor size of the third not gate 5005 is smaller than that of the fourth not gate 5006, because the signal strength of the signal is increased after the signal is first amplified by the third not gate 5005, and the power of the device is increased when the signal is amplified by the fourth not gate 5006, so the design size of the MOS transistor therein may be larger than that of the third not gate 5005, for example, the MOS transistor size of the third not gate 5005 may be designed to be 1/2 of the MOS transistor size in the fourth not gate 5006.

Further, based on the first embodiment of the intelligent power module of the present invention, in the third embodiment of the intelligent power module of the air conditioner of the present invention, as shown in fig. 4, the output module 30 further includes a shaping unit 31;

the output terminal of the second switch 5011 is connected to the input terminal of the shaping unit 31, the output terminal of the shaping unit 31 is the control terminal of the third switch 5007, and the shaping unit 31 shapes the control signal output by the second switch 5011 and outputs the shaped control signal to the control terminal of the third switch 5007.

Specifically, the shaping unit 31 includes a first not gate 5010 and a second not gate 5008;

an input terminal of the first not gate 5010 is an input terminal of the shaping unit 21, an output terminal of the first not gate 5010 is connected to an input terminal of the second not gate 5008, and an output terminal of the second not gate 5008 is an output terminal of the shaping unit 21.

The first not gate 5010 and the second not gate 5008 provide a shaped control signal output from the second switch 5011 to the control terminal of the third switch 5007.

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.

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

1. An intelligent power module is characterized by comprising a three-phase upper bridge arm IGBT tube, a three-phase lower bridge arm IGBT tube, a driving circuit and an adjusting circuit, wherein the driving circuit and the adjusting circuit correspond to each IGBT tube in the three-phase upper bridge arm IGBT tube and the three-phase lower bridge arm IGBT tube;

2. The smart power module of claim 1 wherein each of the regulation circuits includes a voltage detection module, a counting module, an output module, and a first switch;

3. The smart power module of claim 2 wherein the counting module comprises a first not gate and a counter;

4. The smart power module of claim 2 wherein the voltage detection module comprises a comparator, a voltage source;

5. The smart power module of claim 2 wherein the output module comprises a second switch, a third switch, a first PMOS transistor and a second NMOS transistor;

6. The smart power module of claim 5 wherein the output module further comprises a shaping unit;

7. The smart power module of claim 6 wherein the shaping unit comprises a first not gate and a second not gate;

8. The smart power module of claim 2 wherein each of said regulation circuits further comprises a shaping amplification module:

9. The smart power module of claim 8 wherein the shaping amplification module comprises a third not gate and a fourth not gate;

10. The smart power module of claim 9 wherein the MOS transistor size in the third not gate is 1/2 times the MOS transistor size in the fourth not gate.

11. An air conditioner controller comprising the smart power module of any one of claims 1 to 10.