IGBT drive protective circuit board

Abstract

The invention discloses an IGBT drive protective circuit board. The IGBT drive protective circuit board includes a PCB substrate and a drive protective circuit integrated on a printing surface of the PCB substrate in the form of SMT; the drive protective circuit is provided with a positive 5V voltage access end, a pulse signal access end, a positive 24V voltage access end, a negative 24V voltage access end, a grounding terminal, an IGBT gate connection end, an IGBT emitting electrode connection end, an IGBT collector electrode connection end, and an alarm output end; a side surface of the PCB substrate is perpendicularly provided with direct insertion contact pins which are connected to the positive 5V voltage access end, the pulse signal access end, the positive 24V voltage access end, the negative 24V voltage access end, the grounding terminal, the IGBT gate connection end, the IGBT emitting electrode connection end, the IGBT collector electrode connection end, and the alarm output end respectively. The advantages of the IGBT drive protective circuit board are that the side surface of the PCB substrate is provided with a plurality of contact pins which are perpendicular to the side face and are corresponding to the access ends, the connection ends and the output end respectively; and the IGBT drive protective circuit board has the characteristics of small occupation space, good heat dissipation, and easy maintenance.

Description

technical field [0001] The invention relates to a driving circuit board, in particular to an IGBT driving protection circuit board. Background technique [0002] In recent years, insulated gate bipolar transistors (IGBTs) have been widely used in wind power generation equipment, inverters, automotive electronics, home appliances and other fields due to their advantages such as high operating frequency, low switching loss, and large component capacity. However, the IGBT needs a special driving circuit to drive and protect it during use, and the quality of the driving circuit directly affects the performance and reliability of the IGBT. IGBTs generally operate in high voltage and high current environments, so isolation drive methods are generally used. [0003] The IGBT drive circuit board generally includes a PCB circuit board substrate and an IGBT drive circuit arranged on the PCB circuit board substrate. The existing IGBT drive circuit boards have the following defects: 1....

AI Technical Summary

Problems solved by technology

[0003] The IGBT drive circuit board generally includes a PCB circuit board substrate and an IGBT drive circuit arranged on the PCB circuit board substrate. The existing IGBT drive circuit boards have the following defects: 1. The IGBT drive circuit in some IGBT drive circuit boards only includes drive circuit module, and this driving circuit module cannot protect the IGBT during the operation of the IGBT, so the IGBT is easily damaged; 2. The IGBT driving circuit of some IGBT driving circuit boards includes a driving circuit module and a protection circuit module, which can realize the However, the IGBT drive circuit board directly uses the external circuit board as the PCB circuit board substrate, that is, the components inside the IGBT drive circuit are directly welded on the external circuit board together with the components inside other external circuits, so there are many components 1. The structure is more complex, resulting in a large space occupation and poor heat dissipation; 3. Some IGBT drive circuit boards use integrated thick film circuits (such as EXB841) produced by special manufacturers. Although this IGBT drive circuit board includes drive circuit modules inside and protection circuit modules, but the entire circuit is packaged together, the internal components cannot be replaced separately, and only the entire circuit can be replaced during maintenance, so the maintenance cost is high

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