Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

IGBT protection circuit, method and device and three-phase inverter circuit

A protection circuit and device technology, applied in the field of IGBT protection circuit and three-phase inverter circuit, can solve the problems of limiting the working range of the inverter and the inability to fully utilize the output capacity of the IGBT.

Active Publication Date: 2020-06-26
GAC AION NEW ENERGY AUTOMOBILE CO LTD
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on this, it is necessary to address the defects that the traditional IGBT protection circuit has the same voltage protection threshold when the output current is at different current points, so that the output capability of the IGBT cannot be fully utilized and the working range of the inverter is limited, and a kind of IGBT protection circuit, method, device and three-phase inverter circuit

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • IGBT protection circuit, method and device and three-phase inverter circuit
  • IGBT protection circuit, method and device and three-phase inverter circuit
  • IGBT protection circuit, method and device and three-phase inverter circuit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] figure 1 It is the structural diagram of the IGBT protection circuit module of Embodiment 1, such as figure 1 As shown, the IGBT protection circuit of Embodiment 1 includes an adder module 100 and a comparator module 101;

[0061] The input terminal of the adder module 100 is used to access the DC bus voltage U dc and the output current I of the IGBT to be protected c , the adder module 100 is used to calculate the DC bus voltage U dc and output current I c Implement the addition operation;

[0062] Among them, the DC bus voltage U dc That is, the DC bus voltage of the inverter circuit applying the IGBT to be protected, the output current I c is the current flowing through the IGBT to be protected. Among them, the output current I c After inputting into the adder module, according to the characteristics of the input interface of the adder module, the output current I c Converted to the corresponding correction voltage. To the DC bus voltage U dc and output cu...

Embodiment 2

[0090] An embodiment of the present invention also provides a three-phase inverter, including an IGBT protection circuit, a first IGBT, a second IGBT, a third IGBT, a fourth IGBT, a fifth IGBT, and a sixth IGBT;

[0091] The emitter of the first IGBT is connected to the collector of the second IGBT, and the collector of the first IGBT and the emitter of the second IGBT are used to connect the DC bus voltage U dc ;

[0092] The emitter of the third IGBT is connected to the collector of the fourth IGBT, and the collector of the third IGBT and the emitter of the fourth IGBT are used to access the DC bus voltage U dc ;

[0093] The emitter of the fifth IGBT is connected to the collector of the sixth IGBT, and the gap between the collector of the fifth IGBT and the emitter of the sixth IGBT is used to access the DC bus voltage U dc ;

[0094] The IGBT protection circuit includes an adder module and a comparator module;

[0095] The input terminal of the adder module is used to ...

Embodiment 3

[0100] Figure 5 It is the flow chart of the IGBT protection method of embodiment three, such as Figure 5 As shown, the IGBT protection method of the third embodiment includes steps S100 to S102:

[0101] S100, get the DC bus voltage U dc and the output current I of the IGBT to be protected c ;

[0102] S101, according to the output current I c The product of the preset resistance value is obtained to obtain the corrected voltage;

[0103] Wherein, the magnitude of the correction voltage can be adjusted by adjusting the preset resistance value. The smaller the preset resistance value, the higher the output capability of the IGBT to be protected. Wherein, the preset resistance value may correspond to the type of the IGBT to be protected.

[0104] S102, if the DC bus voltage U dc and the sum of the correction voltage is greater than the reference voltage V ref , turn off the IGBT to be protected.

[0105] After obtaining the corrected voltage, calculate the DC bus vol...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to an IGBT protection circuit, method and device and a three-phase inverter circuit. Inputting and outputting current to an adder module is conducted, and the voltage corresponding to the output current is obtained. The sum of the voltage and the direct current bus voltage is calculated and represented as the voltage of a first input end, and the voltage of the first input end is compared with the reference voltage through a comparator module. When the voltage of the first input end is larger than the reference voltage, the IGBT is turned off through the output end of thecomparator module. Based on this, when the output current is small, higher DC bus voltage is allowed, that is, the voltage overvoltage threshold value of the IGBT is increased, so that the output capability of the IGBT is fully utilized, and the working range of the inverter is widened.

Description

technical field [0001] The invention relates to the technical field of power supply circuits, in particular to an IGBT protection circuit, method, device and three-phase inverter circuit. Background technique [0002] A three-phase inverter is a power supply device that converts direct current into alternating current, and is mainly used in communication, factory and enterprise uninterruptible power supply systems. Among them, IGBT (Insulated Gate Bipolar Transistor) is a high-power semiconductor switching tube and is the core component of modern inverters. During the working process of the inverter, the IGBT must be guaranteed to work within a safe range, that is, the DC bus voltage and the output current flowing through the IGBT cannot exceed the allowable value. Among them, the range that can ensure the safe operation of the IGBT is called the safe working area. [0003] The working mode of the traditional IGBT protection circuit is to set the voltage overvoltage thresho...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H03K17/081H03K17/567
CPCH03K17/08116H03K17/567
Inventor 夏铸亮刘呈超王明亮杨康陈平赵小坤
Owner GAC AION NEW ENERGY AUTOMOBILE CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com