Voltage closed loop control method of ISG motor for hybrid electric vehicle

A technology of hybrid electric vehicles and control methods, applied in the direction of motor generator control, electronic commutation motor control, control of electromechanical brakes, etc., to achieve the effect of improving safety

Inactive Publication Date: 2011-01-05
CHONGQING CHANGAN AUTOMOBILE CO LTD +1
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Problems solved by technology

[0002] At present, the electric / power generation integrated motor used in hybrid electric vehicles, hereinafter referred to as ISG motor, mostly adopts permanent magnet synchronous motor, and the functions realized can be divided into two aspects: power generation and electric motor, but the current ISG motor control is generally torque Loop control, that is, the motor realizes the power generation function, which requires an external given torque input, which is equivalent to a current source, and does not output a relatively stable voltage like a conventional car generator

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  • Voltage closed loop control method of ISG motor for hybrid electric vehicle
  • Voltage closed loop control method of ISG motor for hybrid electric vehicle
  • Voltage closed loop control method of ISG motor for hybrid electric vehicle

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[0016] The present invention will be further described below in conjunction with the accompanying drawings.

[0017] figure 1 Shown is the ISG motor voltage closed-loop control algorithm flow chart of the present invention, the ISG motor voltage closed-loop control method of the present invention comprises the following steps:

[0018] First, a reference voltage U is set by the reference voltage setting module d , this value is determined by the optimal operating voltage range of the motor controller output load;

[0019] The voltage detection and feedback module detects the actual DC voltage U through the DC side voltage sensor of the motor controller f , and feed this value back to the data processing module;

[0020] The data processing module subtracts the reference voltage from the actual voltage value output by the voltage feedback module, and outputs the difference ΔU to the PI adjustment module;

[0021] The PI adjustment module performs proportional and integral c...

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Abstract

The invention discloses a voltage closed loop control method of an ISG (Integrated Starter Generator) motor for a hybrid electric vehicle, which comprises a reference voltage setting module, a data processing module, a PI (Proportion Integral) adjusting module, a moment executing module, an inverter and a driving module thereof, and a voltage detection and feedback module. By adding a voltage closed loop module algorithm in the original motor control policy, the function that a motor controller outputs a constant voltage is achieved. According to the invention, the ISG motor can generate constant-voltage electricity as the conventional generators for vehicles, has reliable and stable performances and output voltage with relatively smaller fluctuation along with load and rotation speed.

Description

technical field [0001] The invention belongs to the technical field of hybrid electric vehicles, and is especially suitable for ISG motor control on hybrid electric vehicles without traditional generators. Background technique [0002] At present, the electric / power generation integrated motor used in hybrid electric vehicles, hereinafter referred to as ISG motor, mostly adopts permanent magnet synchronous motor, and the functions realized can be divided into two aspects: power generation and electric motor, but the current ISG motor control is generally torque Loop control, that is, the motor realizes the power generation function, which requires an external given torque input, which is equivalent to a current source, and does not output a relatively stable voltage like a conventional car generator. However, when some special circumstances occur, the ISG motor loses the given torque input, and the power generation is abnormal. Therefore, if the ISG motor needs to be able to...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P9/48H02P21/14H02P21/24
Inventor 王璐肖伟薛山周洪波
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD
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