DC motor control in electronic sewing machine

Electricity: motive power systems – Positional servo systems – Pulse-width modulated power input to motor

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

318269, 112275, 112277, 364513, H02P 506, D05B 6926

Patent

active

050577573

ABSTRACT:
A load of an electronic sewing machine is self-diagnosed by a control system to cause a DC motor to be operated under control to drive upper and lower shafts of the sewing machine. The control system includes an evaluating device to which a voltage value applied to the DC motor and a rotating speed of the DC motor, both detected, are inputted for determining a current value supplied to the DC motor and a power loss of the DC motor. These data are supplied to a fuzzy theory applying device for estimating if the power loss of the DC motor exceeds a rated value by application of a prescribed fuzzy rule. A control command signal representing an amount of the excessive power loss is outputted from the fuzzy theory applying device to the DC motor for the control of the applied voltage. No need to directly measure the current value, and therefore no need to provide a current detecting resistor in a control circuit.

REFERENCES:
patent: 4384241 (1983-05-01), Stillhard
patent: 4545314 (1985-10-01), Fujikawa
patent: 4628434 (1986-12-01), Tashiro et al.
patent: 4628435 (1986-12-01), Tashiro et al.
patent: 4673851 (1987-06-01), Disser
patent: 4691653 (1987-09-01), Neki et al.
patent: 4692676 (1987-09-01), Dohi et al.
patent: 4738211 (1988-04-01), Nakamara et al.
patent: 4749923 (1988-06-01), Chieng
patent: 4749927 (1988-06-01), Rodal et al.
patent: 4763052 (1988-08-01), Lundin et al.
patent: 4777585 (1988-10-01), Kokawa et al.
patent: 4791344 (1988-12-01), Yoshida et al.
patent: 4839823 (1989-06-01), Matsumoto
patent: 4842342 (1989-06-01), Takahashi et al.
patent: 4864490 (1989-09-01), Nomoto et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

DC motor control in electronic sewing machine does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with DC motor control in electronic sewing machine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and DC motor control in electronic sewing machine will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-993238

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.