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IGBT discrete device parallel-connection dynamic current-sharing circuit structure and motor controller

A technology of motor controllers and discrete devices, applied in the direction of AC motor control, control systems, electrical components, etc., can solve problems such as busbar structure asymmetry, current imbalance, etc., to improve output power and reliability, and improve unevenness The effect of flow problems

Inactive Publication Date: 2019-04-16
SHENZHEN HOPEWIND ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of this, the purpose of this application is to provide a parallel dynamic current sharing circuit structure and motor controller of IGBT discrete devices to solve the current unbalanced problem caused by the asymmetric busbar structure of the existing IGBT parallel connection

Method used

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  • IGBT discrete device parallel-connection dynamic current-sharing circuit structure and motor controller
  • IGBT discrete device parallel-connection dynamic current-sharing circuit structure and motor controller
  • IGBT discrete device parallel-connection dynamic current-sharing circuit structure and motor controller

Examples

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no. 1 example

[0023] Such as figure 1 As shown, the first embodiment of the present application provides a parallel dynamic current sharing circuit structure of IGBT discrete devices, and the parallel dynamic current sharing circuit structure of IGBT discrete devices includes N IGBT discrete devices (shown as VT1 and VT2 in the figure), The drive circuit, the first busbar (shown by the straight line where Lac is located in the figure) and the second busbar (shown by the straight line where Ldc is located in the figure);

[0024] The gates of the N IGBT discrete devices (shown by G1 of VT1 and G2 of VT2) are all connected to the output end of the drive circuit, and the emitters of the N IGBT discrete devices (E1 of VT1 and E2 of VT2 shown) are connected to the first busbar, and the collectors of the N IGBT discrete devices (shown as C1 of VT1 and C2 of VT2) are connected to the second busbar;

[0025] The output terminal of the first busbar (shown by A in the figure) is routed from one side...

no. 2 example

[0033] Such as image 3 As shown, the second embodiment of the present application provides a motor controller. The motor controller includes a DC bus capacitor C1, a positive DC bus DC+, a negative DC bus DC-, and connections between the positive DC bus DC+ and A three-phase half-bridge inverter between the negative DC busbar DC-.

[0034] The three-phase half-bridge inverter includes three bridge arms connected in parallel, and each bridge arm includes an upper tube and a lower tube connected in series, an AC busbar, an upper tube drive circuit and a lower tube drive circuit.

[0035] The upper tube includes N first IGBT discrete devices (shown by VT1 and VT2 of the A-phase bridge arm, VT5 and VT6 of the B-phase bridge arm, and VT9 and VT10 of the C-phase bridge arm); the N The gates of the first IGBT discrete device (shown by G1 of VT1 and G2 of VT2, G5 of VT5 and G6 of VT6, G9 of VT9 and G10 of VT10) are connected to the upper tube drive circuit Output terminals, the emi...

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Abstract

The invention discloses an IGBT discrete device parallel-connection dynamic current-sharing circuit structure and a motor controller. The circuit structure comprises N IGBT discrete devices, a drivingcircuit, a first busbar and a second busbar. The gates of the N IGBT discrete devices are connected to the output end of the driving circuit. The emitter electrodes of the N IGBT discrete devices areconnected to the first busbar. The collector electrodes of the N IGBT discrete devices are connected to the second busbar. The output terminal of the first busbar is led out from one side of the N IGBT discrete devices. The driving circuit is arranged at the position, closest to the output terminal of the first busbar, of the IGBT discrete devices. The potential reference point of the driving circuit is connected with the emittor electrode of one IGBT discrete device at the above position. The input terminal of the driving circuit receives a driving signal. The problem of uneven current between IGBTs is improved by using the negative feedback effect of a parasitic inductor. The effect of dynamic current sharing is achieved, and the output power and the reliability of the motor controllerare improved.

Description

technical field [0001] The present application relates to the technical field of power electronics, in particular to a parallel dynamic current sharing circuit structure of IGBT discrete devices and a motor controller. Background technique [0002] The main power topology of the current mainstream electric vehicle motor controllers is a three-phase half-bridge. Most of the power devices used are IGBT modules, and only a few use IGBT discrete devices. [0003] The advantages of using IGBT modules are high reliability and relatively simple structural design. Using a single module can increase the power of the motor controller, and can meet the power requirements without parallel connection. Its drive design is relatively easy, but the IGBT module There is the problem of high prices, and the cost pressure is high. [0004] The motor controller using IGBT discrete devices, the upper and lower bridge arms of each phase are connected in parallel by multiple IGBTs packaged in TO-2...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/088H02M7/5387H02P27/06
CPCH02M1/088H02M7/5387H02P27/06
Inventor 张永岚文熙凯李锦达
Owner SHENZHEN HOPEWIND ELECTRIC CO LTD
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