Electricity: motive power systems – Induction motor systems – Primary circuit control
Patent
1978-09-19
1981-05-12
Shoop, William M.
Electricity: motive power systems
Induction motor systems
Primary circuit control
318811, 363 97, 363141, H02P 700
Patent
active
042675006
ABSTRACT:
Cooling means for cooling a control such as for use in controlling the operation of electric vehicles or the like. The control utilizes a direct current battery power supply and includes an inverter for delivering alternating current to an alternating current motor of an air moving structure, such as a fan, provided for cooling the control during the operation thereof. The circuit is arranged to cause the fan to have variable power as a direct function of the load demand of the control circuit so that maximum cooling occurs when the load demand in the control is maximum and minimum cooling occurs when the load demand is minimum. The circuit is arranged to maintain an effectively constant volt-second duty cycle characteristic at the control power supply to the air moving structure whereby the variation in power developed by the motor thereof is a function of the duty cycle characteristics of the control power supply as applied to the motor. The control may include an oscillator and ramp for providing, in combination with a feedback signal from the output of the control power supply, a variable duty cycle control of the inverter of the control so as to provide the desired maintained volt-second characteristic of the control power supply.
REFERENCES:
patent: 2959723 (1960-11-01), Lordo
patent: 3059164 (1962-10-01), Johnson
patent: 3373334 (1968-03-01), Geisz et al.
patent: 3869566 (1975-03-01), Smith
patent: 4148097 (1979-04-01), Deisch
Bourke Robert F.
Johansen David K.
Gould Inc.
Shoop William M.
Wong Peter S.
LandOfFree
Control cooling means does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Control cooling means, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Control cooling means will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2049216