Title:
【発明の名称】高安定性のダイナミックフォースリラクタンスモータ
Document Type and Number:
Japanese Patent JP2003515436
Kind Code:
A
Abstract:
Motor control of a variable reluctance motor is obtained by providing a periodic voltage waveform to a coil of a motor. No coil current control or current or flux feedback is needed to obtain flux waveforms that allow for low-distortion or distortion-free operation of the motor. The periodic voltage waveform may be a sinusoidal or sawtooth signal, for example, and has a substantially zero mean for each cycle of the signal. The periodic voltage waveform may be offset to compensate for the resistance of the coil, and the coil current may be monitored in order to determine the amount of offset required. By providing a zero-mean or substantially zero-mean periodic voltage waveform, the coil current and flux in the gap between the core and the moving part are guaranteed to reach a zero value at some point during each period (or cycle) of the periodic voltage waveform.
Inventors:
Keith F. Joseph
Application Number:
JP2001541331A
Publication Date:
May 07, 2003
Filing Date:
December 06, 2000
Export Citation:
Assignee:
Macrosonics Corporation
International Classes:
B06B1/04; H02P25/02; H02P25/06; H02P25/08; (IPC1-7): B06B1/04; H02P7/00; H02P7/05
Attorney, Agent or Firm:
Shimizu Hatsushi (1 person outside)