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Closed-loop torque and speed control of the brushless permanent magnet (BLPM) machine requires rotor positional information to control the associated power electronic inverter. Rotor position information is acquired by position sensors or position sensorless schemes. These position sensors increase the cost and size of the BLPM drive systems and make it prone to mechanical failure due to the sensitive...
The use of an integrated, low cost, non-contact, SAW torque sensor to improve the dynamic performance of permanent magnet servo drive systems has been reported previously. This paper reports on an extension to this research that proposes the use of the SAW device for rotor mechanical position detection. A start-up procedure that enables machine control at and from zero speed is presented.
This paper proposes the use of an integrated low cost SAW torque sensor to improve the dynamic performance of permanent magnet servo drive systems including rotor position detection. A start-up procedure that enables machine control at and from zero speed is discussed and results presented to illustrate performance.
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