Permanent magnet synchronous motor vector decoupling controller for electromobile based on DSP (Digital Signal Processor)

Abstract

The invention discloses a permanent magnet synchronous motor (PMSM) vector decoupling controller for an electromobile based on a DSP (Digital Signal Processor). The controller is based on a DSP chip and comprises a DSP power supply, a serial port communication circuit, a power main circuit, a signal detection circuit, a protection circuit and a CAN (Controller Area Network) communication interface circuit; the controller receives a motor control mode and a torque parameter from a VCU (Vector Control Unit) on a bus; the DSP chip accomplishes corresponding vector control, current speed ring control and an SVPWM (Space Vector Pulse Width Modulation) algorithm; an output PWM signal controls on-off of a power electronic device in an inverter circuit, thereby controlling a PMSM; a current and voltage detection circuit realizes self-protection and fault diagnosis by the protection circuit by acquiring real-time voltage and current parameters of the PMSM; a photoelectric encoder obtains an electrical angle and a rotating speed feedback value by acquiring position and rotating speed parameters of the PMSM; and finally the real-time status of motor control is fed back to the VCU by the CAN communication interface circuit. With the adoption of the controller, a PMSM control system for the electromobile has the advantages of high performance, high reliability, convenience in maintenance and full digitalization.

Description

technical field [0001] The invention relates to the field of motor drive transmission for power electric vehicles, in particular to a DSP-based permanent magnet synchronous motor vector decoupling controller for electric vehicles. Background technique [0002] With the rapid development of the world economy and the automobile industry, automobiles have gradually become people's daily means of transportation, but at the same time, the world's environmental pollution and resource shortages have prompted the development of automobiles from traditional fuel vehicles to new energy electric vehicles, so vigorous research And the development of electric vehicle technology, to realize the transformation of vehicle energy power system from oil to electricity, has set off a great research boom all over the world. [0003] The overall structure of the electric vehicle drive system is a motor control system composed of a battery as a power supply, a motor as a power output, and a power ...

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Problems solved by technology

[0005] At present, my country already has related technologies for software and hardware development of motor controllers, but the product functions are not perfect compared with foreign countries, and there are shortcomings such as low power, poor dynamic performance, large torque inertia and time constant, and weak anti-interference. , unable to meet the needs of electric vehicle controllers

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