Dragon Sun Law Firm, PC
Position-sensorless control method and device for long-cable drive permanent magnet motor
A position-sensorless control method and device for long-cable drive permanent magnet motors, including: adding a coupling circuit after boost transformers in the long-cable drive circuit of a permanent magnet motor; coupling three high frequency detection signals with different frequencies into a power supply cable and windings of the motor through three coupling transformers in the coupling circuit respectively; obtaining high frequency voltage components on primary windings of the coupling transformers by bandpass filters; obtaining the position signals according to relations among effective values of the high frequency voltage components; and finally realizing the position-sensorless control of the motor by a controller according to the obtained position signals.
TIANGONG UNIVERSITY
H H H
H02P H02P H02P
inventional inventional inventional
Wei Tingna Xinglong Changliang Xinmin
Chen Shi Sun Xia Li