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Closed-loop control method for power generation power of range extender of electric automobile

A power generation, closed-loop control technology, applied in electric vehicle charging technology, electric vehicles, motor vehicles, etc., can solve the problems of low emission, lack of dynamic responsiveness, small power range, etc., to achieve fast response, ensure controllability and Running performance, feedback control output stabilization effect

Active Publication Date: 2019-08-30
ZHEJIANG UNIV
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Problems solved by technology

The advantage of this operation method is that it can maintain the high efficiency and low emission of the range extender, but the disadvantage is that it lacks dynamic response and the power range that can be realized is small

Method used

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  • Closed-loop control method for power generation power of range extender of electric automobile
  • Closed-loop control method for power generation power of range extender of electric automobile
  • Closed-loop control method for power generation power of range extender of electric automobile

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with accompanying drawing.

[0028] The electric vehicle range extender mentioned in the present invention includes an engine, a generator, an engine controller (Engine Control Unit, referred to as ECU), a generator controller (Generator Control Unit, referred to as GCU), a range extender controller (Range-extender Control Unit, referred to as RCU); the engine and the generator are connected in a mechanical coaxial manner to form a range extender; the generator outputs high-voltage direct current through the generator controller; both the ECU and the GCU communicate with the RCU through the CAN bus to interact.

[0029] attached figure 2 The general flow chart of the closed-loop control method of the electric vehicle range extender generating power of the present invention is given. The closed-loop control method can be roughly divided into six steps: mechanical power prediction, mechanical power co...

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Abstract

The invention discloses a closed-loop control method for power generation power of a range extender of an electric automobile. The method comprises the six steps of mechanical power prediction, mechanical power modification, mechanical power decoupling, migration trajectory control, mechanical power realization and power generation power feedback. According to the method, feedforward prediction and feedback closed-loop control are carried out on a range extender system at the same time, the advantages of high feedforward control response are kept, the characteristics of control output stability and high control precision of feedback are further inherited, so that the errors between the target power generation power and the actual power generation power of the range extender are reduced, and the high-efficient and stable operation of the range extender is ensured. According to the method, an optimal operation trajectory line and a trajectory control line are arranged, so that in steady-state and transient-state power generation power regulation processes of the range extender, the rotating speed and the torque of the range extender can be adjusted and transferred along the optimal operation trajectory line as far as possible, the efficiency and the emission of the range extender reach an ideal state while the range extender responds to request power with different levels, and the controllability and the running performance of the range extender are effectively ensured.

Description

technical field [0001] The invention mainly relates to a closed-loop control method for power generation of an electric vehicle range extender, which belongs to the field of new energy vehicles, and is mainly used for controlling the power generation of the range extender of an electric vehicle, so that the response speed of the power generation is fast and the steady-state error is small. And it can dynamically migrate along the optimal running trajectory, so that the range extender can not only dynamically respond to the generated power, but also ensure its high efficiency and low emissions during the response process. Background technique [0002] Limited by the technical level and manufacturing cost of current batteries, range-extended electric vehicles are one of the most ideal models for the transition from traditional vehicles to future pure electric vehicles. By adding a set of internal combustion engine power generation or fuel cell power generation devices to the t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L50/62B60L15/20
CPCB60L15/20B60L50/62Y02T10/62Y02T10/70Y02T10/72Y02T90/16
Inventor 姚栋伟吕成磊吴锋侯珏金一垒
Owner ZHEJIANG UNIV
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