A three-parallel igbt drive control circuit for electric vehicles

Abstract

The invention relates to a three-parallel insulated gate bipolar transistor (IGBT) driving control circuit for an electromobile. The three-parallel IGBT driving control circuit comprises a push-pull output circuit, wherein the push-pull output circuit is used for receiving pulse width modulation (PWM) driving pulse K1, the output end of the push-pull output circuit is connected with the input end of a current equalization circuit, the output end of the current equalization circuit is connected with gate poles of a first IGBT, a second IGBT and a third IGBT separately, the input end of an overvoltage balancing protection circuit is used for receiving a signal K2 of a control end, the output end of the overvoltage balancing protection circuit is connected with the gate poles of the first IGBT, the second IGBT and the third IGBT separately, emitters of the first IGBT, the second IGBT and the third IGBT are all connected with a reference signal K3, the output end of the voltage equalization circuit is connected with the gate poles of the first IGBT, the second IGBT and the third IGBT and the emitters of the first IGBT, the second IGBT and the third IGBT separately. The three-parallel IGBT driving control circuit is simple in structure and is high in driving capability, and the PWM signal is used for simultaneously driving signals of the gate poles of three paths of IGBTs by the push-pull circuit; with the arrangement of the push-pull output circuit, the voltage equalization circuit and the overvoltage balancing protection circuit, the parallel outputs of the three IGBTs are high in symmetry, and the three-phase output stability of the three IGBTs working in parallel is ensured.

Description

technical field [0001] The invention relates to the technical field of new energy vehicles, in particular to a three-parallel IGBT drive control circuit for electric vehicles. Background technique [0002] Most of the inverter drive control of new energy vehicles adopts one-way control to drive one IGBT, but because the load capacity of a single IGBT is limited, especially when the inverter output power is required to be large, the load capacity of a single IGBT It is far from meeting the requirements, and even if the use of double IGBTs in parallel still cannot meet the requirements of use, this can improve the load capacity of the inverter by using three IGBTs in parallel. In the field of new energy vehicles, compared with small passenger cars, the development of pure electric buses has higher requirements in terms of load output power. In order to meet high output power and obtain higher economic benefits Under the situation, it is urgent to adopt three parallel IGBT dri...

AI Technical Summary

Problems solved by technology

[0002] Most of the inverter drive control of new energy vehicles adopts one-way control to drive one IGBT, but because the load capacity of a single IGBT is limited, especially when the inverter output power is required to be large, the load capacity of a single IGBT It is far from meeting the requirements, and even if the use of double IGBTs in parallel still cannot meet the requirements of use, this can improve the load capacity of the inverter by using three IGBTs in parallel.

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