Title:
THREE PHASE PERMANENT MAGNET MOTOR DRIVING METHOD
Document Type and Number:
WIPO Patent Application WO/2019/010518
Kind Code:
A8
Abstract:
This invention provides a better 3 phase sensor-less permanent magnet motor control which further reduces power loss and electrical noise, and to provide a higher effective supply voltage to each winding. In order to do this the common node of a star connected 3 phase permanent magnet motor is disconnected to provide 3 separated windings and each 2 ends of the winding are driven separately by a full bridge inverter. Current flowing into each coil is sensed with analogue to digital converter to provide speed and torque information of the motor into the feedback loop. 3 phase current information is fed into the Clarke Transform of the Field Oriented Control (FOC ) or Direct Torque Control (DTC ) for close loop motor control. Replacing the Space Vector Modulation output, the 2 dimension rotational control voltages are transformed into 3 sinusoidal voltage vectors with anti-Clarke Transform, each sinusoidal voltage is then converted into Sinusoidal Pulse Width Modulation ( SPWM ) to control the full bridges. With proper configurations, the motor can also run in open loop mode.
Inventors:
LAU CHUN TO (AU)
Application Number:
PCT/AU2017/050775
Publication Date:
February 14, 2019
Filing Date:
July 26, 2017
Export Citation:
Assignee:
LAU CHUN TO (AU)
LAU SIU HEI (AU)
LAU SIU HEI (AU)
International Classes:
H02P21/08; H02P21/10; H02P21/30; H02P23/30
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