Electricity: motor control systems – Closed loop speed control system for dc motor with commutator – Armature control by digital or combined analog and digital...
Patent
1988-01-13
1989-05-23
Shoop, Jr., William M.
Electricity: motor control systems
Closed loop speed control system for dc motor with commutator
Armature control by digital or combined analog and digital...
307246, 307594, 361 89, 388810, 388918, 388921, H02P 706
Patent
active
048333794
ABSTRACT:
A fail-safe circuit is disclosed for use with an intermittently operated d.c. motor connected by means of a circuit breaker to a power supply, wherein a control circuit provides control pulses intermittently to the motor. The fail-safe circuit includes a capacitor which is charged when the drive pulses are being applied to said motor, and is discharged when the drive pulses are not being applied to said motor. A reference voltage is generated and compared with the voltage stored on said capacitor. When the voltage on the capacitor exceeds the reference voltage, the circuit breaker is caused to interrupt the power supply to the motor.
REFERENCES:
patent: 3215896 (1965-11-01), Shattuck et al.
patent: 3348099 (1967-10-01), Schweitzer et al.
patent: 3466527 (1969-09-01), Chun
patent: 3700968 (1971-12-01), Spies
patent: 3719858 (1971-08-01), Gilbreath
patent: 4258404 (1981-03-01), Challet
patent: 4280161 (1981-07-01), Kuhn et al.
Kaibel Gary W.
Schweitzer Frederick F.
Martin David
Sherwood Medical Company
Shoop Jr. William M.
LandOfFree
Motor control fail-safe 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 control fail-safe circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Motor control fail-safe circuit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1732586