Segmented resistance type IGBT driving circuit and control method thereof

A segmented resistance and drive circuit technology, applied in the control of segmented resistive IGBT drive circuits, in the field of segmented resistive IGBT drive circuits, can solve the problems of low application frequency and large switching losses of IGBT tubes, and improve device application frequency, reduced switching loss, and easy programming

Inactive Publication Date: 2017-05-10
NANJING NARI GROUP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art, provide a segmented resistance type IGBT

Method used

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  • Segmented resistance type IGBT driving circuit and control method thereof
  • Segmented resistance type IGBT driving circuit and control method thereof
  • Segmented resistance type IGBT driving circuit and control method thereof

Examples

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Example Embodiment

[0023] The present invention proposes a segmented resistance type IGBT drive circuit and control method on the basis of traditional drive technology. The drive resistance of the IGBT is controlled at the rising edge and the falling edge of the gate drive pulse to reduce the switching loss of IGBT devices and improve The application frequency of the device. The present invention will be further described below in conjunction with the drawings. The following embodiments are only used to illustrate the technical solutions of the present invention more clearly, and cannot be used to limit the protection scope of the present invention.

[0024] Such as figure 1 As shown, IGBT is the driven element, G is the IGBT gate, C is the collector, and E is the emitter. The segmented resistance type IGBT drive circuit provided by the present invention includes a drive push-pull circuit, a segmented resistance drive circuit and an IGBT gate clamp circuit.

[0025] The segmented resistance drive c...

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Abstract

The invention discloses a segmented resistance type IGBT driving circuit, which is characterized in that a segmented resistor driving circuit comprises a plurality of segmented resistors which are connected in series, both ends of each segmented resistors are connected with a bypass MOS transistor in parallel; each bypass MOS transistor and a driving push-pull circuit are connected with a driving controller; and an IGBT gate clamping circuit comprises an IGBT gate voltage-stabilized clamping circuit and an IGBT gate power supply clamping circuit. The invention further discloses a control method of the segmented resistance type IGBT driving circuit, which is characterized in that a pulse rising edge and a falling edge are driven at the gate, and the size of the gate driving resistance is changed through switching of the bypass MOS transistors. The segmented resistance type IGBT driving circuit and the control method thereof can achieve the purposes of reducing the switching loss of an IGBT device and improving the application frequency of the device while ensuring suppression for surge and gate oscillation.

Description

technical field [0001] The invention relates to a segmented resistance type IGBT drive circuit and a control method for the segmented resistance type IGBT drive circuit, belonging to the technical field of power electronics. Background technique [0002] Like other power electronic devices, the reliability of IGBT depends on the driving circuit. The high input impedance of IGBT makes it easier to drive, but it is also easy to cause excessive source current or excessive dv / dt, resulting in latch-up effect and failure. Therefore, a drive circuit with excellent performance is a necessary condition to ensure the efficient and reliable operation of the IGBT. The gate drive resistance Rg of the IGBT has a direct impact on the driving effect, and the turn-on and turn-off of the IGBT depends on the size of Rg. The larger Rg is, the longer its turn-on and turn-off time is, and the switching loss is also larger, but the surge voltage becomes smaller, which reduces the possibility of ...

Claims

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Application Information

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IPC IPC(8): H03K17/567H03K17/081
CPCH03K17/567H03K17/08116H03K2217/0036
Inventor 郑玉平李伟邦侯凯何安然蒋应伟范镇淇王后生王志刚
Owner NANJING NARI GROUP CORP
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