Flying Start of PMSM Strategy Based on Adaptive Triple Zero Voltage Vector Pulses Method
Permanent magnet synchronous motor(PMSM)is often operates at high speed due to its inertia or external propulsion when the power supply is interrupted during operation.It is necessary to estimate the initial position/speed before flying start.The fixed action time and interval time of the traditional zero voltage vector pulse method often reduce the estimation accuracy and even cause overcurrent.Therefore,an adaptive triple zero voltage vector pulses method is studied in this paper,which can adaptively adjust the action time according to the amplitude of the current vector excited by the zero voltage vector pulses and adjust the interval time according to the initial speed estimation twice successively,so as to automatically apply the reasonable zero voltage vector pulses for different PMSM parameters or operating states.The simulation results show that the proposed adaptive triple zero voltage vector pulses method can adaptively adjust the reasonable action time and interval time,so as to improve the reliability of initial position/speed estimation and flying start.
NETL
NSTL
万方数据
