Permanent magnet motor controller applied to pure electric car and control method

Abstract

The invention discloses a permanent magnet motor controller applied to a pure electric car and a control method. The controller is mainly composed of a power panel, a control board, a drive board and a power component; the power panel is connected with the control board, the drive board and the power component; the control board is connected with a vehicle controller through a CAN bus; the control output of the control board is connected with the drive board; the output of the drive board is connected with the power component; a group of analogue quantity inputs of the control board are respectively connected with a current transformer and a rotary transformer; the current transformer is connected with a power terminal of the permanent magnet motor, and the rotary transformer is connected with the rotating shaft of the permanent magnet motor. The permanent magnet motor controller applied to the pure electric car disclosed by the invention can precisely control the rotating speed of the motor, effectively reduces the switching loss and greatly improves the dynamic response speed of the system and the acceleration characteristics of the motor. The controller can meet the requirement of the pure electric car, of which the power requirement is less than 60KW, just by exchanging a cooler and the drive board as to the electric cars with different requirements, and saves the production cost and the production cycle for a manufacturing plant of the controller.

Description

technical field [0001] The invention relates to a permanent magnet motor controller and a control method applied to a pure electric car. Background technique [0002] With the rapid growth of the number of cars in the world, traditional internal combustion engine vehicles bring more and more harm to the human environment while bringing convenience to people. The rising demand for environmental protection and the increasing shortage of oil reserves have made internal combustion engines unable to meet the requirements, and the efficiency of traditional fuel engines is low, generally between 30% and 50%. Now, electric vehicles are powered by on-board power supplies and driven by motors. Car driving, as a zero-pollution vehicle, electric vehicles do not pollute the environment generated by internal combustion engine vehicles, and the efficiency of electric vehicles exceeds that of traditional vehicles. The highest efficiency of the system is usually above 90%, especially the per...

AI Technical Summary

Problems solved by technology

[0003] At present, most electric vehicles in China use AC asynchronous motors and DC motors as the driving core, but the power factor of AC asynchronous motors lags behind, the power factor of light loads is low, and the speed regulation performance is slightly poor, while the manufacture of DC motors is relatively expensive, and there are carbon brushes and commutators. wear, short service life, loud noise

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