Electro-magnetic doubly salient motor driving and charging integrated system with energy feedback and control method thereof

Abstract

The invention discloses an electro-magnetic doubly salient motor driving and charging integrated system with energy feedback and a control method thereof. Four switch tubes Sa, Sb, Sc and Sd are added in a front-stage bidirectional DC / DC converter of a two-stage converter topology of the system, and an energy feedback path in a system driving operation mode is formed by combining a split excitation winding; when the electro-magnetic doubly salient motor is braked and runs, the braking energy can be fed back to the storage battery side under the condition that the excitation current direction is not changed in combination with the control of the energy feedback path, the energy utilization rate and the performance of the driving system are improved, the parallel control of the two sections of split excitation windings can be realized in a charging working mode, and the high-power charging requirement of the storage battery is met.

Description

technical field [0001] The invention belongs to the field of motor system and control, and in particular relates to an electric excitation double salient pole motor driving and charging integrated system with energy feedback and a control method thereof. Background technique [0002] As the core component of an electric vehicle, the drive motor must meet the limitations of the vehicle's structural size and the operating conditions under complex working conditions. Its performance is directly related to the power performance and energy conversion efficiency of the electric vehicle. Since the 21st century, permanent magnet synchronous motors, switched reluctance motors and induction motors have been the main types of drive motors for electric vehicles. Electric excitation doubly salient motor is a new type of motor extended on the basis of switched reluctance motor and permanent magnet doubly salient motor, and it has been widely concerned in the field of motors. The electric...

AI Technical Summary

Problems solved by technology

During the driving operation, the two excitation windings are connected in parallel, which can realize the operation of the motor in a wide speed range by adjusting the excitation current; during the charging operation, the charging circuit is constructed through the front stage DC / DC, so that the two excitation windings are connected in parallel and the current flows in the opposite direction, eliminating the electromagnetic Torque: Electromagnetic braking can be realized during deceleration, and energy can be fed back to the battery to increase energy utilization, but it will change the flow direction of the excitation current. This commutation process will affect the dynamic performance of the system and reduce the stability of the system

Images