Gate drive circuit board, gate drive unit and driving method thereof

Abstract

The invention relates to a gate driving circuit board. The gate driving circuit board is used for driving and controlling a high-power IGBT (insulated gate bipolar transistor and comprises a CPLD (complex programmable logic device) master control chip, a primary low-voltage PCB (printed circuit board), a secondary high-voltage PCB (printed circuit board), an isolation driving transformer and a high-voltage dividing PCB. A gate driving unit in the gate driving circuit board comprises a power source module, a high-voltage dividing module, a short circuit protecting module, a fault display module, a fault feedback module, a self-checking and self-recovery module and an optical fiber starting module. The gate driving circuit board, the gate driving unit and a gate driving method provide update alternatives and optional schemes for same-specification GDU-DYTP 140 A which is commonly used in the past. Compared with imported products, the gate driving circuit board, the gate driving unit and the gate driving method reduce the cost, improve the efficiency and embody significant advantages through excellent performance and excellent service.

Description

Technical field [0001] The invention relates to a traction system, in particular to a gate drive circuit board, a gate drive unit and a drive method thereof used for controlling and monitoring the state of IGBT in the traction system. Background technique [0002] In the traction system, the control of VVVF inverter and chopping is mostly completed by the on-off of the high-power transistor module IGBT, so IGBT plays a key role in this system. Efficient control and monitoring of the IGBT status must become the most critical part of the entire traction system. [0003] Gate Drive Unit (GDU), a programmable printed circuit board used to drive and control high-power IGBT transistors, is especially widely used in traction control. In the past 10 years, several mainstream domestic and foreign vehicles such as BOMBARDIER, SIEMENS, ALSTOM, etc., which are basically used for traction control of EMUs and subways, have occupied the main market with their mature technology, stable performanc...

AI Technical Summary

Problems solved by technology

[0004] However, in recent years, some components of the traction control equipment used in current vehicles at home and abroad have basically reached the end of their service life, especially the GDU, which is directly related to the high-power load of the IGBT, is originally a component with a high failure rate and a high vulnerability rate, which is about to usher in a large-scale Aging, damage and must be replaced

However, the original parts (such as BOMBARDIER) have a long lead time and high price, and there are only pre-sales services and no after-sales technical support for this part

Due to the continuous improvement of domestic and foreign customers in recent years, they have a certain understanding of related technologies and are familiar with key components. They think that the integration of GDU components is limited, and the difference between cost and sales price is too large, and the import price is too high. High, the cycle is too long, and it is expected to provide technical support when the GDU fails or is damaged, and can repair or provide improvement suggestions without affecting the basic performance, but the original import cannot meet these requirements

Images