Electric vehicle integrated charger based on double three-phase motors and control method thereof

Abstract

The invention relates to a permanent magnet motor technology, and aims to provide an electric vehicle integrated charger based on double three-phase motors and a control method thereof. A dual three-phase open winding permanent magnet motor is adopted, two ends of a stator winding are opened and led out of a stator shell, and the stator winding is respectively connected with an alternating current input power supply and a motor converter through a mode switch; the mode switch reconstructs a winding of the dual three-phase open-winding permanent magnet motor to serve as an electric vehicle charging circuit inductor, so that a motor rotor is kept static during charging; the motor winding is multiplexed as an alternating current side filter inductor during the charging period, and forms a rectifying circuit together with the motor converter. According to the invention, flexible switching between the charging state and the driving state can be realized, and the hardware cost of the electric vehicle is saved; the reconstruction mode is based on original hardware conditions, the scheme is simple, and the universality is high. Compared with the traditional voltage outer loop-current inner loop current feedforward decoupling control, the current dynamic response is fast; and circuit parameters are not used in control operation, so that the system robustness is good.

Description

technical field [0001] The invention relates to permanent magnet motor technology, in particular to an electric vehicle integrated charger based on a dual-three-phase motor and a control method thereof, belonging to the field of electrical technology. Background technique [0002] With the progress of society, people pay more and more attention to the sustainable development mode of green, low-carbon and environmental protection. In recent years, the global development trend has gradually shifted towards green and low-carbon development. Compared with traditional fuel vehicles, electric vehicles have attracted the attention of researchers because of their environmental protection and energy saving features, and the research on electric vehicles is booming. The current charging power of the existing vehicle-mounted AC charging system is generally low, and due to redundant components, the charging equipment is relatively large, which is not conducive to the development of ele...

AI Technical Summary

Problems solved by technology

However, the current winding reconstruction methods for multi-phase motors are complex, resulting in poor versatility of the system in different charging modes.

And most of the control adopts the traditional current feed-forward decoupling control method. When the system is running in the single-phase integrated charging state, there are problems of control delay and poor dynamic response; when the system is running in the three-phase integrated charging system, it is necessary to ignore the AC The difference in the parameters of the side filter inductance can be applied, and because there are multiple PI controllers at the same time, it is difficult to set the control parameters

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