CN111817548A - Intelligent power module - Google Patents

Intelligent power module Download PDF

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Publication number
CN111817548A
CN111817548A CN202010735009.2A CN202010735009A CN111817548A CN 111817548 A CN111817548 A CN 111817548A CN 202010735009 A CN202010735009 A CN 202010735009A CN 111817548 A CN111817548 A CN 111817548A
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China
Prior art keywords
tube
power module
terminal
hvic
igbt
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CN202010735009.2A
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CN111817548B (en
Inventor
冯锴雄
杨忠添
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Guangdong Huixin Semiconductor Co Ltd
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Guangdong Huixin Semiconductor Co Ltd
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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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
    • 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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/12—Arrangements for reducing harmonics from ac input or output
    • 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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
    • H02M1/4208—Arrangements for improving power factor of AC input
    • H02M1/4225—Arrangements for improving power factor of AC input using a non-isolated boost converter
    • 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
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
    • H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
    • H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
    • H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M5/4585—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only having a rectifier with controlled elements
    • 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
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
    • H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
    • 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
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
    • H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
    • H02M7/53871—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current
    • H02M7/53873—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current with digital control
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
    • H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
    • H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
    • H02P27/08—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters with pulse width modulation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Inverter Devices (AREA)

Abstract

The invention discloses an intelligent power module, comprising: the device comprises an HVIC (high voltage integrated circuit), a three-phase bridge inverter circuit, a switching tube, a diode, a detection resistor and a comparator; the HVIC tube is connected with the three-phase bridge type inverter circuit and is used for receiving an external control signal and controlling each switching device of the three-phase bridge type inverter circuit to complete inversion; after external alternating current is rectified into direct current, the direct current passes through three inductors connected in parallel, the direct current is respectively input into the intelligent power module and respectively forms three boost unit circuits connected in parallel with a switching tube and a diode inside the module, the current of the PFC circuit is detected through three detection resistors and is output to the outside through a comparator, and the three boost unit circuits are controlled to work by the outside. The invention integrates the staggered PFC circuit and the inverter circuit, reduces current ripples, reduces local heating of the module, adopts integrated packaging, saves the cost of independent packaging and improves the reliability.

Description

Intelligent power module
Technical Field
The invention relates to the technical field of power semiconductors, in particular to an intelligent power module.
Background
In most household appliance applications, the commercial Power needs to be converted into direct current through a rectifier bridge and a PFC (Power Factor Correction) circuit. At present, PFCs of household appliances such as air conditioners and the like all adopt a boost circuit form, as shown in fig. 1: a boost circuit is inserted between the rectifier bridge and the large electrolytic capacitor, the forced current follows the voltage change, and the forced current and the voltage change are kept in the same phase, no obvious waveform distortion exists, and the power factor of the circuit is close to 1. According to the working principle of the boost circuit, the current of the inductor works in a continuous mode and can be modulated in the whole power frequency period, so that the circuit can achieve a higher power factor. Compared with other circuits, the peak current flowing in the switching tube is relatively small, and the voltage of the leakage emitter of the switching tube does not exceed the output voltage, so that the voltage stress of the tube can be reduced; meanwhile, the inductor is connected in series at the input side of the boost, and can inhibit the current ripple to a certain extent; the design of the EMI circuit is simplified, the requirements of the input filter circuit are reduced, and the inductance also prevents transient currents in the grid. The input Power is rectified and then converted into direct current to be supplied to an Intelligent Power Module (IPM). The IPM is used for realizing the continuous adjustment of the rotating speed of the motor and is a core component of the variable-frequency household appliance. A conventional IPM is an inverter module composed of three half-bridges and a control IC.
When the power of the system is high, the PFC in the boost circuit needs to select a device with a high rated current, and a switching tube and a rectifying diode in the circuit can bear high switching stress, so that the loss of the converter is increased, high heat is generated, and the efficiency of the system is reduced. Switching at high currents can also cause severe electromagnetic interference, causing EMI problems. In addition, the external inductor needs to be large in volume and weight and cannot be directly welded on a PCB, and great difficulty is brought to structural design. For the current two-in-one module of the PFC and the inverter in the market, the current born by the PFC part is large, so that the local heat generation is serious. In order to improve heat dissipation, a heat sink is required to be added below the wafer of the PFC, which increases the process difficulty and cost. From the point of view of market failure data, most of the failure samples of the two-in-one module are PFC partial failures.
Disclosure of Invention
In order to solve the technical problems that when the system power is high in the prior art, the current borne by PFC is high, the local heating is serious, and the failure is easy, the invention provides an intelligent power module which integrates an inverter circuit, a three-way staggered PFC circuit and a current detection circuit of the PFC circuit, wherein devices forming the circuits are attached to a substrate or a metal frame and are packaged by plastic packaging materials, and only pins are left to be in contact with the outside. The invention can effectively reduce the heating, improve the reliability of the intelligent power module and improve the electromagnetic interference of the application circuit.
Specifically, the present invention provides an intelligent power module, comprising: the three-phase inverter comprises an HVIC tube, a three-phase bridge inverter circuit, a first drive IC tube, a second drive IC tube, a third drive IC tube, a first switch tube, a second switch tube, a third switch tube, a first diode, a second diode, a third diode, a fourth diode, a fifth diode, a sixth diode, a first detection resistor, a second detection resistor, a third detection resistor, a first comparator, a second comparator and a third comparator; the HVIC tube is connected with the three-phase bridge type inverter circuit and is used for receiving an external control signal and controlling each switching device of the three-phase bridge type inverter circuit to complete inversion; the input end of the first driving IC tube is used as a first PFC control input end of the smart power module, the output end of the first driving IC tube is connected to the gate of the first switching tube, the emitter of the first switching tube is connected to the anode of the first diode, the first end of the first detection resistor and the input end of the first comparator, the collector of the first switching tube is connected to the cathode of the first diode and the anode of the fourth diode and is used as a first PFC inductor connection end of the smart power module, the second end of the first detection resistor is used as a first reference ground end of the smart power module, the output end of the first comparator is used as a first current detection output end of the smart power module, the power supply end of the first comparator is used as a first reference voltage end of the smart power module, and the input end of the second driving IC tube is used as a second PFC control input end of the smart power module, the output end of the second driving IC tube is connected to the gate of the second switching tube, the emitter of the second switching tube is connected to the anode of the second diode, the first end of the second detection resistor and the input end of the second comparator, the collector of the second switching tube is connected to the cathode of the second diode and the anode of the fifth diode and serves as the second PFC inductor connection end of the smart power module, the second end of the second detection resistor serves as the second reference ground end of the smart power module, the output end of the second comparator serves as the second current detection output end of the smart power module, the power supply end of the second comparator serves as the second reference voltage end of the smart power module, the input end of the third driving IC tube serves as the third PFC control input end of the smart power module, and the output end of the third driving IC tube is connected to the gate of the third switching tube, an emitter of the third switching tube is connected to an anode of the third diode, a first end of the third detection resistor and an input end of the third comparator, a collector of the third switching tube is connected to a cathode of the third diode and an anode of the sixth diode and serves as a third PFC inductor connection end of the smart power module, a second end of the third detection resistor serves as a third reference ground end of the smart power module, an output end of the third comparator serves as a third current detection output end of the smart power module, a power end of the third comparator serves as a third reference voltage end of the smart power module, a power end of the first driver IC tube, a power end of the second driver IC tube and a power end of the third driver IC tube are connected to each other and serve as a low-voltage region power supply positive end of the smart power module, and cathodes of the fourth diode, the fifth diode and the sixth diode are connected to each other and serve as a high-voltage region power supply positive end of the smart power module And a voltage input end.
Further, the three-phase bridge inverter circuit comprises a first IGBT tube, a second IGBT tube, a third IGBT tube, a fourth IGBT tube, a fifth IGBT tube, a sixth IGBT tube, a first FRD tube, a second FRD tube, a third FRD tube, a fourth FRD tube, a fifth FRD tube and a sixth FRD tube, wherein the grid electrode of the first IGBT tube is connected with the output end of the U-phase high-voltage region of the HVIC tube, the grid electrode of the second IGBT tube is connected with the output end of the V-phase high-voltage region of the HVIC tube, the grid electrode of the third IGBT tube is connected with the output end of the W-phase high-voltage region of the HVIC tube, the grid electrode of the fourth IGBT tube is connected with the output end of the U-phase low-voltage region of the HVIC tube, the grid electrode of the fifth IGBT tube is connected with the output end of the V-phase low-voltage region of the HVIC tube, the grid electrode of the sixth IGBT tube is connected with the output end of the W-phase low-voltage region of the HVIC tube, the collector electrode of the first IGBT tube is connected with the cathode of the, The cathode of the second FRD tube, the collector of the third IGBT tube, the cathode of the third FRD tube and the high voltage input end of the intelligent power module, the emitter of the first IGBT tube is connected with the anode of the first FRD tube, the cathode of the U-phase high voltage area power supply of the HVIC tube, the collector of the fourth IGBT tube and the cathode of the fourth FRD tube and is used as the negative end of the U-phase high voltage area power supply of the intelligent power module, the emitter of the second IGBT tube is connected with the anode of the second FRD tube, the cathode of the V-phase high voltage area power supply of the HVIC tube, the collector of the fifth IGBT tube and the cathode of the fifth FRD tube and is used as the negative end of the V-phase high voltage area power supply of the intelligent power module, the emitter of the third IGBT tube is connected with the anode of the third FRD tube, the cathode of the W-phase high voltage area power supply of the HVIC tube, the collector of the sixth IGBT tube and the cathode of the sixth FRD tube and is used as the negative end of the W-phase high voltage area power supply of the intelligent power, an emitting electrode of the fourth IGBT tube is connected with an anode of the fourth FRD tube and serves as a U-phase low-voltage reference end of the intelligent power module, an emitting electrode of the fifth IGBT tube is connected with an anode of the fifth FRD tube and serves as a V-phase low-voltage reference end of the intelligent power module, and an emitting electrode of the sixth IGBT tube is connected with an anode of the sixth FRD tube and serves as a W-phase low-voltage reference end of the intelligent power module.
Furthermore, a power supply end of the HVIC pipe is connected with a positive end of a low-voltage area power supply of the intelligent power module, an HIN1 end of the HVIC pipe is used as an input end of a U-phase upper bridge arm of the intelligent power module, an HIN2 end of the HVIC pipe is used as an input end of a V-phase upper bridge arm of the intelligent power module, an HIN3 end of the HVIC pipe is used as an input end of a W-phase upper bridge arm of the intelligent power module, an LIN1 end of the HVIC pipe is used as an input end of a U-phase lower bridge arm of the intelligent power module, an LIN2 end of the HVIC pipe is used as an input end of a V-phase lower bridge arm of the intelligent power module, an LIN3 end of the HVIC pipe is used as a negative end of a W-phase lower bridge arm of the intelligent power module, a VB1 end of the HVIC pipe is used as a positive end of a U-phase high-voltage area power supply of the intelligent power module, and a VB2, and the VB3 end of the HVIC tube is used as the positive end of the W-phase high-voltage area power supply of the intelligent power module.
The invention has the beneficial effects that:
(1) the staggered PFC circuit and the inverter circuit are integrated, so that the cost of independent packaging is saved, and the total area is reduced.
(2) Through the staggered PFC, current ripples are reduced, local heating of the module is reduced, and the reliability of the module is improved.
(3) And the integrated packaging reduces exposed connection points, shortens the distance between devices and improves the reliability.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
Fig. 1 is a schematic diagram of a prior art boost circuit.
Fig. 2 is a schematic structural diagram of the present invention.
The objectives, features, and advantages of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Examples
Referring to fig. 2, the present invention provides an intelligent power module 100, which includes an HVIC (High voltage integrated Circuit) transistor 101, a three-phase bridge inverter Circuit, a first driving IC transistor 102, a second driving IC transistor 103, a third driving IC transistor 104, a first switching transistor 131, a second switching transistor 132, a third switching transistor 133, a first diode 141, a second diode 142, a third diode 143, a fourth diode 144, a fifth diode 145, a sixth diode 146, a first detection resistor 151, a second detection resistor 152, a third detection resistor 153, a first comparator 154, a second comparator 155, and a third comparator 156; the HVIC tube is connected with the three-phase bridge type inverter circuit and is used for receiving an external control signal and controlling each switching device of the three-phase bridge type inverter circuit to complete inversion; an input terminal of the first driving IC tube 102 serves as a first PFC control input terminal PFCIN1 of the smart power module 100, an output terminal of the first driving IC tube 102 IS connected to a gate of the first switching tube 131, an emitter of the first switching tube 131 IS connected to an anode of the first diode 141, a first terminal of the first detection resistor 151 and an input terminal of the first comparator 154, a collector of the first switching tube 131 IS connected to a cathode of the first diode 141 and an anode of the fourth diode 144 and serves as a first PFC inductor connection terminal PFC1 of the smart power module 100, a second terminal of the first detection resistor 151 serves as a first reference ground terminal GND1 of the smart power module 100, an output terminal of the first comparator 154 serves as a first current detection output terminal IS1 of the smart power module 100, a power terminal of the first comparator 154 serves as a first reference voltage terminal VDD1 of the smart power module 100, an input terminal of the second driving IC tube 103 serves as a second PFC control input terminal PFCIN2 of the smart power module 100, the output terminal of the second driving IC tube 103 IS connected to the gate of the second switching tube 132, the emitter of the second switching tube 132 IS connected to the anode of the second diode 142, the first terminal of the second detection resistor 152 and the input terminal of the second comparator 155, the collector of the second switching tube 132 IS connected to the cathode of the second diode 142 and the anode of the fifth diode 145 and serves as the second PFC inductor connection terminal PFC2 of the smart power module 100, the second terminal of the second detection resistor 152 serves as the second reference ground terminal GND2 of the smart power module 100, the output terminal of the second comparator 155 serves as the second current detection output terminal IS2 of the smart power module 100, the power terminal of the second comparator 155 serves as the second reference voltage terminal VDD2 of the smart power module 100, the input terminal of the third driving IC tube 104 serves as the third PFC control input terminal PFC3 of the smart power module 100, the output terminal of the third driving IC tube 104 IS connected to the gate of the third switching tube 133, an emitter of the third switching transistor 133 IS connected to an anode of the third diode 143, a first terminal of the third detection resistor 153 and an input terminal of the third comparator 156, a collector of the third switching transistor 133 IS connected to a cathode of the third diode 143 and an anode of the sixth diode 146 and serves as a third PFC inductor connection terminal 3 of the smart power module 100, a second terminal of the third detection resistor 153 serves as a third reference ground terminal GND3 of the smart power module 100, an output terminal of the third comparator 156 serves as a third current detection output terminal IS3 of the smart power module 100, a power terminal of the third comparator 156 serves as a third reference voltage terminal VDD3 of the smart power module 100, a power terminal of the first driving IC transistor 102, a power terminal of the second driving IC transistor 103 and a power terminal of the third driving IC transistor 104 are connected to each other and serve as a low voltage region power supply positive terminal VDD of the smart power module 100, and cathodes of the fourth diode 144, the fifth diode 145 and the sixth diode 146 are connected to each other and serve as a high voltage terminal of the smart power module 100 An input terminal P. The high voltage input terminal P of the smart power module 100 is generally connected to 300V, connected to the inverter circuit bus, and connected to the bus large capacitance. The first switch tube 131, the second switch tube 132, and the third switch tube 133 are all IGBT (Insulated Gate bipolar transistor) tubes.
The first driving IC tube 102, the second driving IC tube 103 and the third driving IC tube 104 are respectively used for controlling the turn-on and turn-off of the corresponding IGBT. The first comparator 154, the second comparator 155 and the third comparator 156 are respectively used for reading voltage drops on the first detection resistor 151, the second detection resistor 152 and the third detection resistor 153, so as to obtain corresponding current values, and feeding the current values back to an externally controlled microcontroller.
Further, referring to fig. 2, the three-phase bridge inverter circuit includes a first IGBT tube 121, a second IGBT tube 122, a third IGBT tube 123, a fourth IGBT tube 124, a fifth IGBT tube 125, a sixth IGBT tube 126, a first FRD (Fast recovery diode) tube 111, a second FRD tube 112, a third FRD tube 113, a fourth FRD tube 114, a fifth FRD tube 115, and a sixth FRD tube 116, a gate of the first IGBT tube 121 is connected to a U-phase high voltage region output terminal 1 of the HVIC tube 101, a gate of the second IGBT tube 122 is connected to a V-phase high voltage region output terminal HO2 of the HVIC tube 101, a gate of the third IGBT tube 123 is connected to a W-phase high voltage region output terminal HO3 of the HVIC tube 101, a gate of the fourth IGBT tube 124 is connected to a U-phase low voltage region LO output terminal 1 of the HVIC tube 101, a gate of the fifth IGBT tube 125 is connected to a V-phase low voltage region LO2 of the HVIC tube 101, a gate of the sixth IGBT tube 126 is connected to a cathode of the first IGBT tube 121, a collector of the first FRD tube 111 is connected to a W-phase low voltage region output terminal HO tube HO3 of the HVIC tube 101, A collector of the second IGBT tube 122, a cathode of the second FRD tube 112, a collector of the third IGBT tube 123, a cathode of the third FRD tube 113, and a high voltage input terminal P of the smart power module 100, an emitter of the first IGBT tube 121 is connected to an anode of the first FRD tube 111, a U-phase high voltage region power negative electrode VS1 of the HVIC tube 101, a collector of the fourth IGBT tube 124, and a cathode of the fourth FRD tube 114 and serves as a U-phase high voltage region power supply negative terminal UVS of the smart power module 100, an emitter of the second IGBT tube 122 is connected to an anode of the second FRD tube 112, a V-phase high voltage region power negative electrode VS2 of the HVIC tube 101, a collector of the fifth IGBT tube 125, and a cathode of the fifth FRD tube 115 and serves as a V-phase high voltage region power supply negative terminal hvvvs of the smart power module 100, an emitter of the third IGBT tube 123 is connected to an anode of the third FRD tube 113, a W-phase high voltage region power negative electrode VS3 of the HVIC tube 101, a collector of the sixth IGBT tube 126, and a collector of the smart power module 100 and serves as a W-phase high voltage region power supply terminal WVS, an emitter of the fourth IGBT tube 124 is connected to an anode of the fourth FRD tube 114 and serves as a U-phase low-voltage reference end UN of the smart power module 100, an emitter of the fifth IGBT tube 125 is connected to an anode of the fifth FRD tube 115 and serves as a V-phase low-voltage reference end VN of the smart power module 100, and an emitter of the sixth IGBT tube 126 is connected to an anode of the sixth FRD tube 116 and serves as a W-phase low-voltage reference end WN of the smart power module 100.
Further, referring to fig. 2, a power supply end of the HVIC tube 101 is connected to a positive low-voltage supply terminal VDD of the smart power module 100, a HIN1 end of the HVIC tube 101 serves as an U-phase upper arm input end UHIN of the smart power module 100, a HIN2 end of the HVIC tube 101 serves as a V-phase upper arm input end VHIN of the smart power module 100, a HIN3 end of the HVIC tube 101 serves as a W-phase upper arm input end WHIN of the smart power module 100, a LIN1 end of the HVIC tube 101 serves as a U-phase lower arm input end ULIN of the smart power module 100, a LIN2 end of the HVIC tube 101 serves as a V-phase lower arm input end VLIN of the smart power module 100, and a LIN3 end of the HVIC tube 101 serves as a W-phase lower arm input end WLIN of the smart power module 100. The input of the U, V, W three-phase six-way upper and lower bridge arms of the intelligent power module 100 receives 0-5V input signals. The ground terminal of the HVIC tube 101 serves as the negative terminal COM of the low-voltage area power supply of the intelligent power module 100, the VB1 terminal of the HVIC tube 101 serves as the positive terminal UVB of the U-phase high-voltage area power supply of the intelligent power module 100, the VB2 terminal of the HVIC tube 101 serves as the positive terminal VVB of the V-phase high-voltage area power supply of the intelligent power module 100, and the VB3 terminal of the HVIC tube 101 serves as the positive terminal WVB of the W-phase high-voltage area power supply of the intelligent power module 100.
The HVIC tube 101 functions to:
and respectively transmitting the 0-5V logic signals of input terminals HIN1, HIN2, HIN3, LIN1, LIN2 and LIN3 to output terminals HO1, HO2, HO3, LO1, LO2 and LO3, wherein HO1, HO2 and HO3 are logic signals of VS-VS +15V, and LO1, LO2 and LO3 are logic signals of 0-15V. VS is the voltage at the emitter of the corresponding upper bridge IGBT, i.e. the voltage at the UVS, VVS, WVS terminals.
The working principle of the invention is as follows:
after the alternating current is converted into direct current through the rectifier bridge, the direct current is respectively input to the PFC1, PFC2 and PFC3 terminals of the intelligent power module 100 through three parallel inductors, and the external controller respectively controls the first switching tube 131, the second switching tube 132 and the third switching tube 133 through the PFCIN1, PFCIN2 and PFCIN3 terminals. Each external inductor and the switch tube and the diode in the smart power module 100 form a boost unit circuit, for example, the first inductor and the first switch tube 131, the first diode 141 and the fourth diode 144 form a first boost unit circuit, three parallel boost unit circuits operate independently, and the input current is the sum of the three inductor currents. The current of the three-way boost PFC circuit is detected by the negative terminal of three independent first, second and third sampling resistors 151, 152 and 153, fed back to the first, second and third comparators 154, 155 and 156 in real time, and output to the outside by the respective comparators. As long as the conduction time of the three switching tubes is controlled to enable the three inductive currents to be staggered, the ripple wave of the input current can be reduced to the minimum. Since the three boost unit circuits are independent of each other, only one or two of them may be used. During design, the three units need to select devices with the same specification, so that current sharing is realized.
The invention is applied to household appliances such as an air conditioner and the like, and in order to improve that the air conditioner can work in the highest efficiency state in each load stage, when the air conditioner works in the condition of low frequency and light load, three paths of PFC (power factor correction) do not need to work simultaneously, and one path of PFC circuit needs to be closed or only one path of PFC circuit needs to be opened. In the case of two PFC circuits, the on phase of each path will be 180 °.
The input peak average current I _ iavg of each PFC circuit is calculated by the following formula, and the design of the input circuit, such as a rectifier bridge, an EMC part of the circuit input and the like, can be selected according to the calculated value.
Figure BDA0002604677600000091
In the formula: p _ out is the total output power, and the unit is W; u _ imin is the minimum value of the input voltage and has the unit of V; η is the operating efficiency of the PFC circuit.
The current passes through the PFC circuit and is then output to the three-phase bridge inverter circuit inside the intelligent power module 100, and is connected to the external large capacitor through the P terminal. The three-phase bridge type inverter circuit is powered by a PFC circuit and an external large capacitor through a P terminal, and the operation of the motor is controlled through PWM modulation.
In summary, the invention provides an intelligent power module, which integrates a staggered PFC circuit and an inverter circuit, thereby saving the cost of individual packaging and reducing the total area; through the staggered PFC, current ripples are reduced, local heating of the module is reduced, and the reliability of the module is improved; and the integrated packaging reduces exposed connection points, shortens the distance between devices and improves the reliability.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: it is to be understood that modifications may be made to the above-described arrangements in the embodiments or equivalents may be substituted for some of the features of the embodiments without departing from the spirit or scope of the present invention.

Claims (3)

1. A smart power module, comprising: the circuit comprises an HVIC (high voltage integrated circuit) tube (101), a three-phase bridge inverter circuit, a first drive IC tube (102), a second drive IC tube (103), a third drive IC tube (104), a first switch tube (131), a second switch tube (132), a third switch tube (133), a first diode (141), a second diode (142), a third diode (143), a fourth diode (144), a fifth diode (145), a sixth diode (146), a first detection resistor (151), a second detection resistor (152), a third detection resistor (153), a first comparator (154), a second comparator (155) and a third comparator (156); the HVIC tube is connected with the three-phase bridge type inverter circuit and is used for receiving an external control signal and controlling each switching device of the three-phase bridge type inverter circuit to complete inversion; an input end of the first driving IC tube (102) serves as a first PFC control input end (PFCIN1) of the smart power module, an output end of the first driving IC tube (102) IS connected to a gate of the first switching tube (131), an emitter of the first switching tube (131) IS connected to an anode of the first diode (141), a first end of the first detection resistor (151) and an input end of the first comparator (154), a collector of the first switching tube (131) IS connected to a cathode of the first diode (141) and an anode of the fourth diode (144) and serves as a first PFC inductor connection end (PFC1) of the smart power module, a second end of the first detection resistor (151) serves as a first reference ground end (GND1) of the smart power module, and an output end of the first comparator (154) serves as a first current detection output end (IS1) of the smart power module, a power supply terminal of the first comparator (154) is used as a first reference voltage terminal (VDD1) of the smart power module, an input terminal of the second driver IC (103) is used as a second PFC control input terminal (PFCIN2) of the smart power module, an output terminal of the second driver IC (103) is connected with a gate of the second switch tube (132), an emitter of the second switch tube (132) is connected with an anode of the second diode (142), a first terminal of the second detection resistor (152) and an input terminal of the second comparator (155), a collector of the second switch tube (132) is connected with a cathode of the second diode (142) and an anode of the fifth diode (145) and is used as a second PFC inductance connection terminal (PFC2) of the smart power module, a second terminal of the second detection resistor (152) is used as a second reference ground terminal (2) of the smart power module, the output terminal of the second comparator (155) IS used as the second current detection output terminal (IS2) of the smart power module, the power supply terminal of the second comparator (155) IS used as the second reference voltage terminal (VDD2) of the smart power module, the input terminal of the third driver IC (105) IS used as the third PFC control input terminal (PFCIN3) of the smart power module, the output terminal of the third driver IC (104) IS connected with the gate of the third switching tube (133), the emitter of the third switching tube (133) and the anode of the third diode (143), the first terminal of the third detection resistor (153) IS connected with the input terminal of the third comparator (156), the collector of the third switching tube (133) IS connected with the cathode of the third diode (143) and the anode of the sixth diode (146) and IS used as the third PFC inductance connection terminal (PFC3) of the smart power module, the second end of the third detection resistor (153) IS used as a third reference ground terminal (GND3) of the smart power module, the output terminal of the third comparator (156) IS used as a third current detection output terminal (IS3) of the smart power module, the power supply terminal of the third comparator (156) IS used as a third reference voltage terminal (VDD3) of the smart power module, the power supply terminal of the first driving IC transistor (102), the power supply terminal of the second driving IC transistor (103) and the power supply terminal of the third driving IC transistor (104) are connected with each other and used as a low-voltage region power supply positive terminal (VDD) of the smart power module, and the cathodes of the fourth diode (144), the fifth diode (145) and the sixth diode (146) are connected with each other and used as a high-voltage input terminal (P) of the smart power module.
2. The intelligent power module as claimed in claim 1, wherein the three-phase bridge inverter circuit comprises a first IGBT (121), a second IGBT (122), a third IGBT (123), a fourth IGBT (124), a fifth IGBT (125), a sixth IGBT (126), a first FRD (111), a second FRD (112), a third FRD (113), a fourth FRD (114), a fifth FRD (115), and a sixth FRD (116), the gate of the first IGBT (121) is connected to the U-phase high voltage region output terminal (HO1) of the HVIC (101), the gate of the second IGBT (122) is connected to the V-phase high voltage region output terminal (HO2) of the HVIC (101), the gate of the third IGBT (123) is connected to the W-phase high voltage region output terminal (HO3) of the HVIC (101), and the gate of the fourth IGBT (124) is connected to the U-phase low voltage region output terminal (HO1) of the HVIC (101), the grid of the fifth IGBT tube (125) is connected with a V-phase low-voltage area output end (LO2) of the HVIC tube (101), the grid of the sixth IGBT tube (126) is connected with a W-phase low-voltage area output end (LO3) of the HVIC tube (101), the collector of the first IGBT tube (121) is connected with the cathode of the first FRD tube (111), the collector of the second IGBT tube (122), the cathode of the second FRD tube (112), the collector of the third IGBT tube (123), the cathode of the third FRD tube (113) and the high-voltage input end (P) of the intelligent power module, the emitter of the first IGBT tube (121) is connected with the anode of the first FRD tube (111), the U-phase high-voltage area power negative pole (VS1) of the HVIC tube (101), the collector of the fourth IGBT tube (124) and the cathode of the fourth FRD tube (114) and serves as the negative pole (UVS) of the U-phase high-voltage area power supply of the intelligent power module, the emitter of the second IGBT (122) is connected with the anode of the second FRD (112), the V-phase high-voltage region power negative electrode (VS2) of the HVIC (101), the collector of the fifth IGBT (125) and the cathode of the fifth FRD (115) and serves as the V-phase high-voltage region power supply negative terminal (VVS) of the intelligent power module, the emitter of the third IGBT (123) is connected with the anode of the third FRD (113), the W-phase high-voltage region power negative electrode (VS3) of the HVIC (101), the collector of the sixth IGBT (126) and the cathode of the sixth FRD (116) and serves as the W-phase high-voltage region power supply negative terminal (WVS) of the intelligent power module, the emitter of the fourth IGBT (124) is connected with the anode of the fourth FRD (114) and serves as the U-phase low-voltage reference terminal (UN) of the intelligent power module, the emitter of the fifth IGBT (125) is connected with the anode of the fifth FRD (115) and serves as the V-phase low-voltage reference terminal (UN) of the intelligent power module And the emitter of the sixth IGBT tube (126) is connected with the anode of the sixth FRD tube (116) and is used as a W-phase low-voltage reference end (WN) of the intelligent power module.
3. An intelligent power module according to claim 2, wherein the power supply terminals of the HVIC tubes (101) are connected to the positive low-voltage region power supply terminal (VDD) of the intelligent power module, the HIN1 terminals of the HVIC tubes (101) are used as the U-phase upper bridge arm input terminals (UHIN) of the intelligent power module, the HIN2 terminals of the HVIC tubes (101) are used as the V-phase upper bridge arm input terminals (VHIN) of the intelligent power module, the HIN3 terminals of the HVIC tubes (101) are used as the W-phase upper bridge arm input terminals (WHIN) of the intelligent power module, the LIN1 terminals of the HVIC tubes (101) are used as the U-phase lower bridge arm input terminals (ULIN) of the intelligent power module, the LIN2 terminals of the HVIC tubes (101) are used as the V-phase lower bridge arm input terminals (VLIN) of the intelligent power module, the LIN3 terminals of the HVIC tubes (101) are used as the W-phase lower bridge arm input terminals (VLIN) of the intelligent power module, and the ground terminals of the HVIC tubes (101) are used, the VB1 end of the HVIC tube (101) is used as a U-phase high-voltage area power supply positive end (UVB) of the intelligent power module, the VB2 end of the HVIC tube (101) is used as a V-phase high-voltage area power supply positive end (VVB) of the intelligent power module, and the VB3 end of the HVIC tube (101) is used as a W-phase high-voltage area power supply positive end (WVB) of the intelligent power module.
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