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This paper reviews the development and application of the AC motor speed regulation technology and microcontroller technology , elaborated the working principle of the two-phase asynchronous motor , theoretically derived mathematical model of vector control two-phase asynchronous motor , the establishment of a two-phase asynchronous motor vector transformation theory and the theory of coordinate transformation ; application vector transform theory , combined with frequency control and sinusoidal pulse width modulation theory and microcontroller technology , the design of a single-chip control voltage source inverter drive two-phase asynchronous motor vector control VVVF systems. In addition , from the soft , hard and carrot angle proposed a reasonable as long as the control system block diagram and the block diagram , and according to the characteristics of the MCS-51 instruction set , the software architecture of complex vector operations a simplified , all-digital vector control system . Finally, the conclusion of vector control variable speed analysis .
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