Motor drive method and drive circuit

Details Motor drive method and drive circuit Motor drive method and drive circuit

1998-01-29

2000-05-23

Ro, Bentsu

Textiles: ironing or smoothing

Smoothing implements

Flatirons

318724, 318696, H02P 800

Patent

active

060652314

ABSTRACT:
There is disclosed a synchronous motor drive in which in a record disc drive of an information recording device a quantity of generated excitation noise is reduced to a small level to which a reading/writing signal is not influenced and a substantial motor generation torque is prevented from lowering. An absolute value of a maximum voltage gradient of a coil excitation voltage waveform is set to a certain value or less. The waveform alternates at a synchronous frequency which is determined by the number of poles of a rotating magnetic field produced in an air gap by a stator winding and the number of revolutions.

REFERENCES:
patent: 3740629 (1973-06-01), Kohlhagen
patent: 4087732 (1978-05-01), Pritchard
patent: 4349867 (1982-09-01), Otsuka et al.
patent: 5043642 (1991-08-01), Ohi
patent: 5296793 (1994-03-01), Lang
patent: 5504404 (1996-04-01), Tamaki et al.
patent: 5825151 (1998-10-01), Ikawa et al.

Affiliated with

Also associated with

Rating

Motor drive method and drive circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Motor drive method and drive circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Motor drive method and drive circuit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1828215