Electricity: motive power systems – Positional servo systems – Digital or numerical systems
Patent
1995-10-24
1997-11-18
Martin, David S.
Electricity: motive power systems
Positional servo systems
Digital or numerical systems
318608, 318432, 318606, 328812, 328912, G05B 1929
Patent
active
056891636
ABSTRACT:
A motor controller of the present invention has a frequency generator which outputs, in accordance with a rotation of the motor, a predetermined number of rotational signals every time the motor makes one rotation. A period signal representative of the period of the rotational signals is calculated, and the period signal and a predetermined value are subtracted to obtain a speed error signal. The error signal is stored at a predetermined address of a memory. A filter which performs filtering by use of a plurality of error signals in the memory and a subtracter which subtracts the error signals and the contents of the memory are provided. A selecting circuit outputs the error signal when the error signal is outside a predetermined range and outputs an output of the filter when the error signal is within the predetermined range. Thereafter, the selecting circuit outputs an output signal of the subtracter. A control signal is produced from an output of the selecting circuit. The driving torque of the motor is varied in accordance with the control signal.
REFERENCES:
patent: 4543516 (1985-09-01), Kobori et al.
patent: 4710825 (1987-12-01), Oita et al.
patent: 4819087 (1989-04-01), Takeuchi et al.
patent: 4823207 (1989-04-01), Kobayashi et al.
patent: 5023924 (1991-06-01), Tajima et al.
patent: 5220551 (1993-06-01), Tateishi et al.
patent: 5239245 (1993-08-01), Lee
patent: 5298841 (1994-03-01), Katayama et al.
Martin David S.
Rohm & Co., Ltd.
LandOfFree
Motor controller 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 controller, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Motor controller will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1568370