Driving method for multiple-pole motors with optimum driving wav

Details Driving method for multiple-pole motors with optimum driving wav Driving method for multiple-pole motors with optimum driving wav

1997-08-13

1998-11-17

Wysocki, Jonathan

Electricity: motive power systems

Limitation of motor load, current, torque or force

318254, 318432, H02P 700

Patent

active

058381295

ABSTRACT:
This invention concerns a method for driving multiple poles (rotors and stators) motors. A driving waveform with the best efficiency according to electromagnetic analysis is used to avoid unnecessary magnetic saturation effect to reduce iron loss of the motor. Since the smallest possible current is used to generate maximum torque, copper loss is reduced so the motor is not heated and its efficiency is increased. In addition, the driving method divides magnetic poles into 3N parts (N is an integer) so that poles at opposite corners has the same waveform and the same torque. This implementation avoids generation of static force, effectively generates torque and avoids vibration and noises. It is an energy saving, effective and stable way of driving motor.

REFERENCES:
patent: 4876491 (1989-10-01), Squires et al.
patent: 5321343 (1994-06-01), Kane, Jr. et al.
patent: 5497064 (1996-03-01), Sistine
patent: 5717298 (1998-02-01), Tang et al.

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