Electricity: motive power systems – Battery-fed motor systems
Patent
1975-12-30
1978-03-28
Schaefer, Robert K.
Electricity: motive power systems
Battery-fed motor systems
318447, 318484, H02P 100, H02P 300
Patent
active
040817253
ABSTRACT:
A chopper motor-controller for regulating a lift truck traction motor incorporates means for detecting faults which may cause the truck to run out of control, such as the high speed bypass contacts which shunt the semiconductor power switch being welded closed, and for disabling the controller in response thereto and also has time delay means for preventing a directional contactor from closing in on a fault before the fault detecting means can operate to disable the controller. The disclosed controller may alternatively be connected to require the operator to relax the accelerator foot pedal when starting or changing direction or to permit change of direction while the foot pedal is depressed.
REFERENCES:
patent: 3855520 (1974-12-01), Stich
patent: 3902105 (1975-08-01), Delaney et al.
Gilmore Thomas P.
Henry Luke F.
Murphy Howard G.
Schmidt Harvey E.
Allis-Chalmers Corporation
Indyk Eugene S.
Kaiser Lee H.
Schaefer Robert K.
LandOfFree
Lift truck control providing time delay in operation of directio does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Lift truck control providing time delay in operation of directio, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lift truck control providing time delay in operation of directio will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-644877