EP 0576668 A4 19941109 - PULSE WIDTH MODULATION POWER CIRCUIT.
Title (en)
PULSE WIDTH MODULATION POWER CIRCUIT.
Title (de)
LEISTUNGSSCHALTUNG FÜR PULSWEITENMODULATION.
Title (fr)
CIRCUIT DE PUISSANCE A MODULATION DE LARGEUR D'IMPULSIONS.
Publication
Application
Priority
- US 9300523 W 19930121
- US 82274792 A 19920121
Abstract (en)
[origin: WO9314559A1] A pulse width modulation speed control for a d.c. motor (12). A control input (26) corresponding to a motorist setting or a sensed condition is coupled to pulse width modulation circuit (16) that generates a variable duty cycle signal. The signal is used to adjust the speed of the motor. Auxiliary sensing of the motor's operating condition, such as current sensing, automatically shuts down the motor.
IPC 1-7
IPC 8 full level
G05D 23/19 (2006.01); H02P 7/29 (2006.01)
CPC (source: EP)
G05D 23/1913 (2013.01); H02P 7/2913 (2013.01)
Citation (search report)
- [X] EP 0240172 A2 19871007 - GEN MOTORS CORP [US]
- [X] US 4706180 A 19871110 - WILLS FRANK E [US]
- [A] PATENT ABSTRACTS OF JAPAN vol. 13, no. 383 (E - 811) 24 August 1989 (1989-08-24)
- [A] PATENT ABSTRACTS OF JAPAN vol. 14, no. 425 (E - 0977) 13 September 1990 (1990-09-13)
- See references of WO 9314559A1
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
WO 9314559 A1 19930722; EP 0576668 A1 19940105; EP 0576668 A4 19941109
DOCDB simple family (application)
US 9300523 W 19930121; EP 93904552 A 19930121