Abstract: With the fast development of the semiconductor industry, especially the appearance of the digital signal processor, and accurate asynchronous electrical machinery model and proposition of different advanced control strategy, heavy promotion development that electrical machinery control very, make precision to be high, range wide to transfer speed, control of good performance electrical machinery realization of controller become possible. Vector control as one advanced control strategy, to unify theory , electromechanical energy change with coordinate varying foundation of theory develop in electrical machinery, have the characteristics of advance , emergent novelty and practicability. Its thought is to change the model of the asynchronous motor through the coordinate, make it become direct current motor model, divided the electric current vector of the stator into according to the weight of two pieces of direct current with directional magnetic field of the rotor and controls, realize magnetism coherent and torque solve lotus root control , in the hope of the control result of the direct current reaching machine.
This subject uses the principle that the vector controls, control special-purpose DSP chip TMS320F240 as the core with the electrical machinery, develop one transfer speed to be systematic on the basis of frequency conversion that vector control. Urge realization of software make detailed introduction to whole hardware circuit of system in the article, adopt one new-type PWM modulate method one voltage space vector law (SVPWM ) is it realize control on asynchronous electrical machinery to come at the same time, have improved the utilization efficiency of energy . Proved by practice, the vector based on DSP chip controls frequency conversion and adjusts the speed systematically and of good performance, running steadily, anti-interference ability is strong, it is with low noises that the electrical machinery runs , can yet be regarded as a set of control systems with advanced type , emergent novelty , practicability.
Keyword: The vector is controlled;frequency conversion adjusts the speed;the digital signal processor (DSP );space vector law of the voltage (SVPWM)。