Construction method of electric vehicle permanent magnet hub motor energy composite controller

Abstract

The invention discloses a construction method of an electric vehicle permanent magnet wheel hub motor energy composite controller.A composite controlled object is formed by a permanent magnet wheel hub motor, a temperature measurement module and a rotating speed and electric angle calculation module, and a PARK conversion module, a CLARK conversion module and a PWM inverter module are sequentially connected in series to form a composite inverter control module; an intelligent heat control module is composed of a temperature setting module, a heat calculation module, and a heat regulation and control module, a heat PI regulation module and a current conversion module which are sequentially connected in series; a flux linkage observation module, a coordinate transformation module, a torque error calculation module, a reference torque calculation module, a torque estimation module, a target torque giving module, a PI adjustment module, a phase angle updating module and a current transformation module jointly form a composite temperature control torque module, and the temperature of the hub motor is measured to feed back and adjust the running state of the motor; and the composite temperature control torque module and the heat control module are jointly regulated and controlled to realize temperature and torque control.

Description

technical field [0001] The invention relates to a permanent magnet hub motor for an electric vehicle, in particular to a construction method of a controller thereof, which is suitable for compound control of heat feedback and torque fluctuation of a permanent magnet hub motor system of an electric vehicle, and belongs to the technical field of permanent magnet hub motor control. Background technique [0002] The transformation from traditional cars to pure electric vehicles will effectively solve the energy and environmental problems faced by the automotive industry. Pure electric vehicles are clean and environmentally friendly and can achieve zero emissions. The in-wheel motor is to install the motor in the wheel, which has the advantages of high transmission efficiency and flexible control. Compared with the traditional driving method, it saves the complicated mechanical rotation, not only reduces the weight of the vehicle, but also increases the size of the vehicle interio...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for constructing an energy compound controller of a permanent magnet hub motor for an electric vehicle, aiming at the problem of demagnetization of the permanent magnet caused by the overheating of the operating environment of the current hub motor and the corresponding output torque ripple. The controller can effectively improve the problems of motor heat rise and torque fluctuation caused by temperature, so as to achieve the goal of high-performance control of permanent magnet hub motors for electric vehicles

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