Insulated gate bipolar transistor (IGBT)-bridge-switch-topology-based driving circuit and protection module thereof
A drive circuit and bridge switch technology, which is applied in the direction of emergency protection circuit devices, circuit devices, emergency protection circuit devices, etc. for limiting overcurrent/overvoltage, can solve the problems of inability to protect, high circuit cost, etc., and achieve cost Reduced, reliable short-circuit protection effect
Active Publication Date: 2014-04-02
深圳市澳地特智控技术有限公司
View PDF4 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0006] The technical problem to be solved by the present invention is to provide a protection for the drive circuit based on the IGBT bridge switch topology in view of the defects of the prior art that the above-mentioned circuits are high in cost and cannot protect the output short circuit and the short circuit of the upper and lower bridge arms. modules for reliable short-circuit protection at low cost
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0028] image 3 It is a logic structure diagram of Embodiment 1 of the protection module of the drive circuit based on the IGBT bridge switch topology of the present invention, combined with figure 1 , Q1 isolation drive circuit 1, Q3 isolation drive circuit 3, Q5 isolation drive circuit 5, Q2 isolation drive circuit 2, Q4 isolation drive circuit 4, Q6 isolation drive circuit 6 in the drive circuit 00 respectively according to the gate drive signal output by the MCU Drive IGBT tubes Q1, Q3, Q5, Q2, Q4, Q6. It should be noted that the bridge switching topology in all embodiments of the present invention is illustrated by taking six IGBT tubes outputting three-phase inverter voltage as an example, but the present invention does not limit the number of IGBT tubes to 6, and can also be When there are 4 IGBT tubes, the bridge switching topology outputs a single-phase inverter voltage. The protection module includes a bus current detection unit 8, a threshold value comparison unit...
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
Login to View More Abstract
The invention relates to an insulated gate bipolar transistor (IGBT)-bridge-switch-topology-based driving circuit and a protection module thereof, which are used for a frequency converter, an inverter and a switching power supply. The protection module comprises a bus current detection unit, a threshold value comparison unit, a low-side control unit and a fault feedback unit, wherein the bus current detection unit is used for detecting bus current and converting a detected current signal into a voltage signal; the threshold value comparison unit is used for comparing the voltage signal with a set reference voltage threshold value; the low-side control unit is used for regulating the positive gate pole driving voltage of a low-side IGBT to second voltage which is lower than the positive gate pole driving voltage of the IGBT which works normally when the voltage signal is greater than the reference voltage threshold value; and the fault feedback unit is used for feeding a fault signal back to a micro control unit (MCU) when the voltage signal is greater than the reference voltage threshold value and the positive gate pole driving voltage of the low-side IGBT is regulated to the second voltage, and the MCU stops outputting a gate pole driving signal according to the fault signal. By the technical scheme provided by the invention, reliable short-circuit protection can be realized, and cost is low.
Description
technical field [0001] The present invention relates to a drive circuit based on IGBT tube (Insulated Gate Bipolar Transistor, insulated gate bipolar crystal oscillator tube) bridge switching topology, more specifically, relates to a drive circuit based on IGBT tube for frequency converters, inverters, and switching power supplies The drive circuit and its protection module of the bridge switch topology. Background technique [0002] Due to its low conduction loss, small average driving power and fast switching characteristics, IGBT tube devices have been widely used in frequency converters, inverters, switching power supplies and other equipment. IGBT tubes are the key to bridge switching topology. device to complete the power conversion. [0003] figure 1 It is the most common bridge switching topology circuit with IGBT tube devices Q1, Q2, Q3, Q4, Q5, and Q6 as switching elements on the market. The driving methods of the IGBT tubes are as follows: [0004] The first is...
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
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/32H02M7/537H02H9/02
Inventor 金昕明
Owner 深圳市澳地特智控技术有限公司