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Armature reconfiguration type charger sliding-mode control method for electric automobile

A technology of electric vehicles and control methods, which is applied in the direction of motor generator control, electric vehicle charging technology, electronic commutation motor control, etc., can solve the problem of whether the current ripple motor generates electromagnetic torque and the control method has low robustness , unsatisfactory control effects, etc., to achieve good portability and versatility, reduce pollution, and facilitate engineering debugging

Pending Publication Date: 2020-01-21
NANTONG UNIVERSITY
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For electric drive reconfigurable chargers, scholars at home and abroad have done a lot of research on its circuit topology, but the research on its control method is not comprehensive. Electromagnetic torque is generated, and the current flowing through the motor winding is generally controlled by a PI controller. The control method has low robustness, and for a nonlinear system such as an electric drive reconfigurable charger, the control effect is not ideal

Method used

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  • Armature reconfiguration type charger sliding-mode control method for electric automobile
  • Armature reconfiguration type charger sliding-mode control method for electric automobile
  • Armature reconfiguration type charger sliding-mode control method for electric automobile

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Embodiment Construction

[0035] The present invention will be further explained below in conjunction with the accompanying drawings.

[0036] like figure 1 As shown, a sliding mode control method for an electric drive reconfigurable charger for an electric vehicle includes the following steps:

[0037] Step 1: In each control cycle, sample the current charging current of the battery 1, use the charging current PI controller 2, and then pass through the first limiter controller 3 to calculate the charging voltage reference value u of the battery in real time o * . Specifically:

[0038] The battery reference charging current i o * with the current battery charging current i o The difference e io Input the charging current PI controller 2, then input the output value of the charging current PI controller 2 into the first limiter controller 3, calculate the charging voltage reference value u of the battery according to the formula (1) o * ;

[0039]

[0040] where k pi and k ii are the pro...

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Abstract

The invention discloses an armature reconfiguration type charger sliding-mode control method for an electric automobile. The method comprises the steps that firstly, battery charging current is sampled, charging current deviation obtained through charging current negative feedback passes through a PI controller and an amplitude limiting controller, and given charging voltage uo* is obtained; battery charging voltage is sampled, and charging voltage deviation obtained through charging voltage negative feedback passes through the PI controller to be multiplied with sampled rectifier bridge output voltage to obtain motor winding flowing-through current given value; and finally, motor winding flowing-through current is sampled, and is subjected to independent sliding-mode control, and a control signal of a three-phase inverter is obtained to control the three-phase inverter. Alternating-current side unit power running is achieved, the content of AC side input current ripple waves is effectively reduced, it is ensured that in the charging period, the automobile is in the static state all the time, and robustness and anti-interference capacity of the system are greatly improved.

Description

technical field [0001] The invention relates to a sliding mode control method for an electric drive reconfiguration charger for an electric vehicle, belongs to the field of power electronics and electric transmission, and can be applied to the application occasion of on-board charging of new energy vehicles. Background technique [0002] The development of renewable energy technology can deal with global energy and environmental protection issues, and has extremely important strategic significance for improving the existing energy structure and ensuring the sustainable development of the national economy. The large-scale development of new energy vehicles can effectively alleviate the pressure on energy and the environment, and is an important strategic measure to promote technological innovation, transformation and upgrading of the automotive industry. Electric vehicles are an important part of new energy vehicles, and batteries are a key factor restricting their developmen...

Claims

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Application Information

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IPC IPC(8): B60L53/20H02J7/04H02P21/00
CPCB60L53/20H02P21/0007Y02T10/64Y02T10/72Y02T10/70Y02T10/7072Y02T90/14
Inventor 於锋刘兴朱志豪周陈辉吴晓新
Owner NANTONG UNIVERSITY
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