Study Of Permanent Magnet Synchronous Motor Step Motion Control For The Electric Actuator

Permanent magnet synchronous motor (PMSM) step motion control for the electric actuator is a new actuator control system adopted incremental motion control theory. By means of the step control of PMSM, it can offer accurate and reliable position control for the angle travel terminal equipment. Step angle is small, torque is large and inertia is small. This system will promote the technical guideline and control accuracy of the flow and pressure control.PMSM step motion control for the electric actuator is a new mechatronics device based on new control theory and technology, based on ac step motion control theory, that selects the stator field position as the primary control objects and sets the ac step motion control model based on digital control to attain optimal time control through position feedback. This system makes a breakthrough of traditional incremental motion control theories. It breaks the strict ambit between continuum and discrete, speed and position, rotation and step, the space vectors of stator magnetic field and rotor magnetic field are selected as the main control objects, incremental motion control and motion control are combined organically to make incremental motion control develop to large capability, high efficiency, high precision.In this paper, the method of dividing circle rotating magnetic field into polygonal step magnetic field and the step orientation characteristic of space rotating vectors are researched. The analyse method for time-space variables of step motion drive is also introduced. Step power is the key for step magnetic potential, the pulse width modulate technology that selects the triangle wave as the carrier and ladder sine wave as the modulate wave is researched, furthermore the design of the actuator drive adopts DSP as the digital controller is introduced. In the end, the construct and performance of the actuator system are introduced and analysed.Experiments proved that this system has good control capability for speed and position and has good foreground.