A method for increasing that maximum output power of an IPM motor control of an electric vehicle

Abstract

The invention discloses a method for increasing that maximum output power of an IPM motor control of an electric vehicle. A motor controller of the present invention uses a current command obtaining module, A proportional-integral control, a voltage vector limiting algorithm module, a coordinate inverse conversion module, a vector control overmodulation module and a three-phase inverter drive motor, wherein output signals of that three-phase inverter are fed back to the proportional-integral controller through a coordinate conversion module, and position and speed signals of the motor are measured and fed back through a position and speed measurement module; The current command obtaining module gives current commands of d and q axes of the motor according to three regions. The voltage vector limiting algorithm module judges the working condition of the motor and gives the voltage limiting amplitude of d and q axes of the motor. Vector-controlled overmodulation module modulates voltageaccording to region and defines pulse width modulation ratio. The dynamic model of the motor is established to optimize the d, q axis current output quality of the motor. The method improves the maximum output power, realizes the stable control of the current, good dynamic response of the current following and steady-state performance.

Description

technical field [0001] The invention relates to the technical field of motor control, in particular to a method for increasing the maximum output power of an IPM motor controller of an electric vehicle. Background technique [0002] In the interior permanent magnet synchronous motor (IPMSM, Interior Permanent Magnet Synchronous Machine) controller for battery-powered electric vehicles, there are deficiencies in the narrow output voltage range and small output torque, which are the main reasons for the low maximum output power . In order to increase the output power of the motor control system, the design of the motor body is usually considered. The design aims to reduce loss and improve efficiency. To reduce copper loss, the stator resistance is designed to be small. To improve current and torque response, the stator d, q-axis inductance is also small. However, it does not consider the operating characteristics of the motor, and the increase in output power is limited, whi...

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Problems solved by technology

However, it does not consider the operating characteristics of the motor, and the increase in output power is limited, which affects the operating performance of the motor

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