Electric vehicle driving motor controller with charging function and control method thereof

Abstract

An electric vehicle driving motor controller with a charging function is characterized by comprising a three-phase bridge-type DC-AC bidirectional converter, a first relay switch, a second relay switch, an AC power supply input interface device, a driving motor, a voltage reduction transformer, a charging power battery and a central control microprocessor. The electric vehicle driving motor controller and the control method thereof have advantages of concise circuit structure, effective number reduction of electrical elements, higher operation reliability, low cost, small weight, small size and high power factor.

Description

technical field [0001] The invention relates to an electric vehicle drive motor controller integrating the charging functions of single-phase slow charging and three-phase fast charging, in particular to a controller and a control method integrating motor driving and charging functions. Background technique [0002] At present, the solution of foreign electric vehicle drive motor controller with integrated charging function based on the non-isolated integrated "charging-driving" system has been applied in the automotive industry. From the perspective of existing foreign technical solutions, the current "drive-charge" integrated solutions based on PWM rectification technology have realized functions such as efficient charging and unit power factor control, and have great advantages in performance; Three-phase inverters share power electronic devices, which saves the cost of uncontrolled rectification + active power factor correction circuit or PWM rectification circuit. It is...

AI Technical Summary

Problems solved by technology

However, the foreign technology uses the motor winding as the inductance, which has higher requirements on the design of the motor.

In the three-phase charging mode, an additional locking device must be added to the permanent magnet synchronous motor, which is difficult to achieve in terms of control technology

Domestic solutions for motor controllers that integrate driving and charging functions have to add a bidirectional DC-DC buck-boost conversion unit at the front end of the original motor controller, which increases costs and reduces reliability.

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