CN111106596A - Upper bridge arm IGBT driving power supply under-voltage protection circuit, control method and motor driver - Google Patents
Upper bridge arm IGBT driving power supply under-voltage protection circuit, control method and motor driver Download PDFInfo
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- CN111106596A CN111106596A CN201911281366.XA CN201911281366A CN111106596A CN 111106596 A CN111106596 A CN 111106596A CN 201911281366 A CN201911281366 A CN 201911281366A CN 111106596 A CN111106596 A CN 111106596A
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- power supply
- igbt
- driving power
- bridge arm
- upper bridge
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/122—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters
- H02H7/1225—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters responsive to internal faults, e.g. shoot-through
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/04—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
- H02H3/042—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned combined with means for locating the fault
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/09—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against over-voltage; against reduction of voltage; against phase interruption
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The invention provides an upper bridge arm IGBT driving power supply under-voltage protection circuit, a control method and a motor driver, wherein the upper bridge arm IGBT driving power supply under-voltage protection circuit is used for an inverter module or an IPM module, and comprises the following steps: the IGBT driving circuit drives the IGBT through the driving power supply, the undervoltage detection circuit is used for detecting whether the driving voltage is undervoltage or not and outputting an FO signal when the driving voltage is undervoltage, and the control chip is used for controlling the IGBT driving circuit to be conducted, acquiring the FO signal output by the undervoltage detection circuit and outputting a fault code at the display terminal when the FO signal is acquired. When the drive power supply of the upper bridge arm IGBT of the IPM module or the inverter module is under-voltage, the alarm signal FO can be timely output to the control chip, the controller stops the PWM wave transmission, and the damage caused by the error switching-on of the IGBT is prevented; after the main control chip receives the alarm signal, the corresponding alarm code can be displayed, and fault positioning and processing are facilitated.
Description
Technical Field
The invention relates to the field of motor protection, in particular to an upper bridge arm IGBT driving power supply under-voltage protection circuit, a control method and a motor driver.
Background
In the field of motor control, an integrated inverter Module formed by 6 IGBTs (Insulated Gate Bipolar transistors) or an IPM Module (Intelligent Power Module) integrated with a driving circuit and a protection circuit is generally used. The stability of the IGBT driving power supply in the integrated inverter module and the IPM module directly influences the working state of the IGBT, when the driving power supply voltage is too low, the IGBT is difficult to be completely conducted by the driving signal, the conducting impedance is large at the moment, the loss and the heat are serious, and the IGBT can be burnt out.
Corresponding protection circuits are not integrated in a traditional IGBT module, power supply over-voltage and under-voltage protection is generally integrated in the IPM module, but only a power supply on the N side of a lower bridge arm can output a protection signal when the power supply on the P side of an upper bridge arm is under-voltage in 6 IGBTs in the traditional IPM module, the protection signal can not be output although the power supply on the N side of the lower bridge arm can be protected when the power supply on the P side of the upper bridge arm is under-voltage, the PWM signal output of a main control chip is difficult to prevent at the moment, the switching action in a limit state can occur, the IGBT is not completely conducted, the module.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides an inverter module upper bridge arm IGBT driving power supply under-voltage protection circuit, a control method and a motor driver, so that the inverter module or the upper bridge arm IGBT in an IPM module can be under-voltage protected.
The purpose of the invention is realized by the following technical scheme:
in a first aspect, the present invention provides an under-voltage protection circuit for an upper bridge arm IGBT driving power supply, which is used for an inverter module or an IPM module, and includes:
IGBT drive circuit: the first end of the IGBT driving circuit is connected with the grid electrode of the IGBT and drives the IGBT through a driving power supply;
the undervoltage detection circuit: one end of the undervoltage detection circuit is connected with the second end of the IGBT drive circuit and is used for detecting whether the drive power supply is undervoltage or not and outputting an FO signal when the drive power supply is undervoltage;
a control chip: the first port of the control chip is connected with the third end of the IGBT drive circuit, the second port of the control chip is connected with the second end of the undervoltage detection circuit, the control chip controls the IGBT drive circuit to be conducted, the FO signal output by the undervoltage detection circuit is obtained, and a fault code is output at a display terminal when the FO signal is obtained.
Further, the undervoltage detection circuit comprises a voltage regulator tube D1, an optocoupler U1, a resistor R1 and a power supply VDD, wherein a negative electrode of the voltage regulator tube D1 is connected with an output end of the driving power supply, a first end of the IGBT driving circuit is connected with a gate of the IGBT, a positive electrode of the voltage regulator tube D1 is connected with a positive electrode of a light emitting diode of the optocoupler U1, a negative electrode of the light emitting diode of the optocoupler U1 is grounded, a collector of a phototriode of the optocoupler U1 is connected with one end of the resistor R1, a common end of the phototriode is connected with a second port of the control chip, an emitter of the phototriode of the optocoupler U1 is grounded, and the other end of the resistor R1.
Furthermore, the control chip is any one of MCU, ARM, DSP, FPGA and CPU.
Further, the sum of the conduction voltage of the zener diode D1 and the conduction voltage of the light emitting diode of the optocoupler U1 is greater than the lowest reliable voltage of the driving power supply.
Further, the optical coupler U1 is a single-output NPN triode output type optical coupler.
In a second aspect, the invention further provides a control method of the upper bridge arm IGBT driving power supply under-voltage protection circuit, which is applied to the upper bridge arm IGBT driving power supply under-voltage protection circuit of the first aspect.
Further, the control method of the upper bridge arm IGBT driving power supply under-voltage protection circuit comprises the following steps:
the control chip outputs a PWM signal to control the IGBT drive circuit to work, the IGBT drive circuit drives the IGBT through the drive power supply, the undervoltage detection circuit detects whether the drive power supply is undervoltage or not in real time, an FO signal is output to the control chip when the drive power supply is undervoltage, and the control chip displays a fault code on a display terminal after receiving the FO signal.
In a third aspect, the motor driver includes the upper bridge arm IGBT driving power supply under-voltage protection circuit of the first aspect.
The invention has the beneficial effects that: the invention provides an under-voltage protection circuit, a control method and a motor driver of an upper bridge arm IGBT (insulated gate bipolar transistor) driving power supply, when the driving power supply of the upper bridge arm IGBT of an IPM (intelligent power module) or an inverter module is under-voltage, an alarm signal FO can be timely output to a control chip, a controller stops sending PWM (pulse-width modulation) waves, and the IGBT is prevented from being damaged due to mistaken switching-on; after the main control chip receives the alarm signal, the corresponding alarm code can be displayed, and fault positioning and processing are facilitated.
Drawings
The invention is further illustrated by means of the attached drawings, but the embodiments in the drawings do not constitute any limitation to the invention, and for a person skilled in the art, other drawings can be derived on the basis of the following drawings without inventive effort.
Fig. 1 is a circuit configuration diagram of an undervoltage detection circuit of an undervoltage protection circuit of an upper arm IGBT driving power supply according to an embodiment of the present invention.
Fig. 2 is a working schematic diagram of an under-voltage protection circuit of an upper bridge arm IGBT driving power supply according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, 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 only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Embodiment 1, an upper bridge arm IGBT drive power supply undervoltage protection circuit.
The upper bridge arm IGBT driving power supply under-voltage protection circuit of the present embodiment is used for an inverter module or an IPM module, and is described by taking the inverter module as an example, where the inverter module is composed of 6 IGBTs, and 3 upper bridge arms are provided. The driving power supply is divided into two conditions, one is a bootstrap power supply, the other is an independent power supply, and the upper bridge arm power supply has three paths in any condition, so that the upper bridge arm IGBT driving power supply under-voltage protection circuit of the embodiment can be added to each path of driving power supply, the fault signals of the three IGBTs are divided into FO1, FO2, FO3 and the like, and at the moment, the fault position can be accurately judged through the fault signals.
As shown in fig. 1 and fig. 2, the under-voltage protection circuit for any one of the bridge arm IGBT driving power supplies includes:
IGBT drive circuit: the first end of the IGBT driving circuit is connected with the grid electrode of the IGBT and drives the IGBT through a driving power supply;
the undervoltage detection circuit: one end of the undervoltage detection circuit is connected with the second end of the IGBT drive circuit and is used for detecting whether the drive power supply is undervoltage or not and outputting an FO signal when the drive power supply is undervoltage;
a control chip: and the first port of the control chip is connected with the third end of the IGBT drive circuit, the second port of the control chip is connected with the second end of the undervoltage detection circuit, the control chip controls the IGBT drive circuit to be switched on, acquires the FO signal output by the undervoltage detection circuit and outputs a fault code at the display terminal when acquiring the FO signal.
The control chip may be any control chip with logic operation and I/O output functions, such as an MCU, an ARM, a DSP, an FPGA, and a CPU, and the control chip in this embodiment is described by taking the CPU as an example.
The undervoltage detection circuit comprises a voltage regulator tube D1, an optocoupler U1, a resistor R1 and a power supply VDD, the negative electrode of a voltage regulator tube D1 is connected with the output end of the driving power supply, the first end of the IGBT driving circuit is connected with the grid electrode of the IGBT, the positive electrode of a voltage regulator tube D1 is connected with the positive electrode of a light emitting diode of the optocoupler U1, the negative electrode of the light emitting diode of the optocoupler U1 is grounded, the collector of a phototriode of the optocoupler U1 is connected with one end of a resistor R1 and the common end of the phototriode is connected with the second port of the control chip, the emitter of the phototriode of the optocoupler U.
When the voltage of an IGBT driving power VCC is higher than the sum of the conduction voltage of a voltage regulator tube D1 and the conduction voltage of a light emitting diode of the optocoupler U1, the light emitting diode of the optocoupler U1 is conducted, at the moment, a triode of the optocoupler U1 is conducted, and FO outputs low level. When the voltage of an IGBT driving power VCC is lower than the sum of the conduction voltage of a voltage regulator tube D1 and the conduction voltage of a light emitting diode of the optocoupler U1, the light emitting diode of the optocoupler U1 is turned off, at the moment, a triode of the optocoupler U1 is turned off, and FO outputs high level.
The FO signal can be used as a fault alarm signal to be sent to the main control chip, and the main control chip can judge whether the power supply of the driving circuit is in an undervoltage state or not by judging the level of the FO signal.
In a specific implementation mode, for example, the lowest reliable voltage of a driving power supply of the IGBT is 12V, the conduction voltage of a voltage regulator tube D1 is 11.4V, and the conduction voltage drop of a light emitting diode of an optocoupler U1 is 0.7V, that is, when the driving power supply voltage VCC of the IGBT is higher than 12.1V, the voltage regulator tube D1 of the undervoltage detection circuit and the light emitting diode of the optocoupler U1 are conducted, a triode on the other side of the optocoupler U1 is conducted, and at this time, an FO signal is pulled to be low-point flat, so that the IGBT can be driven normally; when the VCC voltage is lower than 12.1V, a voltage regulator tube D1 in the undervoltage detection circuit cannot be conducted at the moment, so that a light emitting diode of the optocoupler U1 is not lighted, a triode of the optocoupler U1 on the other isolation side is closed, the FO signal is connected to VDD through a resistor R1 at the moment, a high-level VDD is output to a CPU, and after the CPU detects the high-level FO signal, the PWM signal is turned off, and a corresponding fault code is given to a display module for fault positioning and diagnosis.
The embodiment provides an under-voltage protection circuit of an upper bridge arm IGBT driving power supply, which can output an alarm signal FO to a control chip in time when the driving power supply of the upper bridge arm IGBT of an IPM module or an inverter module is under-voltage, and a controller stops PWM (pulse width modulation) wave transmission to prevent the IGBT from being damaged due to mistaken turn-on; after receiving the alarm signal, the main control chip can display a corresponding alarm code, so that fault positioning and processing are facilitated; and realize undervoltage fault signal and module part circuit isolation through the opto-coupler, make things convenient for main control chip direct processing.
Embodiment 2 is a control method of an upper bridge arm IGBT driving power supply undervoltage protection circuit.
The embodiment provides a control method of an upper bridge arm IGBT driving power supply under-voltage protection circuit, which is applied to the upper bridge arm IGBT driving power supply under-voltage protection circuit described in embodiment 1, and includes:
the control chip outputs PWM signals to control the IGBT driving circuit to work, the IGBT driving circuit drives the IGBT through the driving power supply, the under-voltage detection circuit detects whether the driving power supply is under-voltage or not in real time, an FO signal is output to the control chip when the driving power supply is under-voltage, and the control chip displays fault codes on the display terminal after receiving the FO signal.
Embodiment 3, a motor driver.
The embodiment provides a motor driver, which comprises an IPM module or an IGBT module, wherein the IPM module or the IGBT module comprises the upper bridge arm IGBT driving power supply under-voltage protection circuit of embodiment 1.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (8)
1. The utility model provides an upper bridge arm IGBT drive power supply under-voltage protection circuit for contravariant module or IPM module, its characterized in that includes:
IGBT drive circuit: the first end of the IGBT driving circuit is connected with the grid electrode of the IGBT and drives the IGBT through a driving power supply;
the undervoltage detection circuit: one end of the undervoltage detection circuit is connected with the second end of the IGBT drive circuit and is used for detecting whether the drive power supply is undervoltage or not and outputting an FO signal when the drive power supply is undervoltage;
a control chip: the first port of the control chip is connected with the third end of the IGBT drive circuit, the second port of the control chip is connected with the second end of the undervoltage detection circuit, the control chip controls the IGBT drive circuit to be conducted, the FO signal output by the undervoltage detection circuit is obtained, and a fault code is output at a display terminal when the FO signal is obtained.
2. The undervoltage protection circuit of an upper bridge arm IGBT driving power supply as claimed in claim 1, wherein the undervoltage detection circuit includes a voltage regulator tube D1, an optocoupler U1, a resistor R1 and a power supply VDD, a negative electrode of the voltage regulator tube D1 is connected to an output end of the driving power supply, a first end of the IGBT driving circuit is connected to a gate of the IGBT, a positive electrode of the voltage regulator tube D1 is connected to a positive electrode of a light emitting diode of the optocoupler U1, a negative electrode of the light emitting diode of the optocoupler U1 is grounded, a collector of a phototransistor of the optocoupler U1 is connected to one end of the resistor R1, a common end of the phototransistor is connected to the second port of the control chip, an emitter of the phototransistor of the optocoupler U1 is grounded, and the other end of the resistor R1 is connected to the power supply.
3. The under-voltage protection circuit for the upper bridge ARM IGBT driving power supply of claim 1, wherein the control chip is any one of MCU, ARM, DSP, FPGA and CPU.
4. The undervoltage protection circuit for the upper bridge arm IGBT driving power supply of claim 2, wherein the sum of the conduction voltage of the voltage regulator diode D1 and the conduction voltage of the light emitting diode of the optocoupler U1 is greater than the lowest reliable voltage of the driving power supply.
5. The undervoltage protection circuit for the upper bridge arm IGBT driving power supply of claim 2, wherein the optocoupler U1 is a single-output NPN triode output type optocoupler.
6. A control method of an upper bridge arm IGBT driving power supply under-voltage protection circuit is characterized in that the control method of the upper bridge arm IGBT driving power supply under-voltage protection circuit is applied to the upper bridge arm IGBT driving power supply under-voltage protection circuit of any one of claims 1 to 5.
7. The control method of the under-voltage protection circuit of the upper bridge arm IGBT driving power supply of claim 6, characterized by comprising the following steps:
the control chip outputs a PWM signal to control the IGBT drive circuit to work, the IGBT drive circuit drives the IGBT through the drive power supply, the undervoltage detection circuit detects whether the drive power supply is undervoltage or not in real time, an FO signal is output to the control chip when the drive power supply is undervoltage, and the control chip displays a fault code on a display terminal after receiving the FO signal.
8. A motor driver, characterized in that the motor driver comprises the upper bridge arm IGBT driving power supply under-voltage protection circuit of any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911281366.XA CN111106596A (en) | 2019-12-13 | 2019-12-13 | Upper bridge arm IGBT driving power supply under-voltage protection circuit, control method and motor driver |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911281366.XA CN111106596A (en) | 2019-12-13 | 2019-12-13 | Upper bridge arm IGBT driving power supply under-voltage protection circuit, control method and motor driver |
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| CN111106596A true CN111106596A (en) | 2020-05-05 |
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| CN201911281366.XA Pending CN111106596A (en) | 2019-12-13 | 2019-12-13 | Upper bridge arm IGBT driving power supply under-voltage protection circuit, control method and motor driver |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113872148A (en) * | 2020-06-30 | 2021-12-31 | 比亚迪半导体股份有限公司 | Undervoltage protection circuit, device and method |
| CN115037193A (en) * | 2022-06-09 | 2022-09-09 | 常熟理工学院 | Direct current brushless motor drive plate with protection function |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101882860A (en) * | 2010-06-23 | 2010-11-10 | 山东大学威海分校 | Novel insulated gate bipolar translator (IGBT) drive and protection circuit |
| CN102612239A (en) * | 2012-04-01 | 2012-07-25 | 洪路 | Ballast for low-frequency electrodeless lamp |
| CN104779778A (en) * | 2015-03-27 | 2015-07-15 | 洛阳中重自动化工程有限责任公司 | Integrated IGBT driving method and device |
| CN105529679A (en) * | 2016-02-18 | 2016-04-27 | 杭州士兰微电子股份有限公司 | IGBT (Insulated Gate Bipolar Transistor) tube protection method and protection circuit and power module using protection circuit |
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2019
- 2019-12-13 CN CN201911281366.XA patent/CN111106596A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101882860A (en) * | 2010-06-23 | 2010-11-10 | 山东大学威海分校 | Novel insulated gate bipolar translator (IGBT) drive and protection circuit |
| CN102612239A (en) * | 2012-04-01 | 2012-07-25 | 洪路 | Ballast for low-frequency electrodeless lamp |
| CN104779778A (en) * | 2015-03-27 | 2015-07-15 | 洛阳中重自动化工程有限责任公司 | Integrated IGBT driving method and device |
| CN105529679A (en) * | 2016-02-18 | 2016-04-27 | 杭州士兰微电子股份有限公司 | IGBT (Insulated Gate Bipolar Transistor) tube protection method and protection circuit and power module using protection circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113872148A (en) * | 2020-06-30 | 2021-12-31 | 比亚迪半导体股份有限公司 | Undervoltage protection circuit, device and method |
| CN115037193A (en) * | 2022-06-09 | 2022-09-09 | 常熟理工学院 | Direct current brushless motor drive plate with protection function |
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