Electricity: motive power systems – Motor-reversing
Patent
1996-07-16
1998-08-04
Ip, Paul
Electricity: motive power systems
Motor-reversing
318139, 318587, 318630, 318640, G05G 700, B62D 5104, B60K 2706
Patent
active
057898847
ABSTRACT:
A control arrangement for a motorised trolley having a handle by which to control a driving motor which propels the trolley. The handle works a transducer which supplies a control signal for the driving motor. Then handle has limited movement relative to the trolley in the fore and aft direction but is stiffly connected to the trolley in the vertical and lateral direction whereby the trolley can be manually controlled by the handle in pitch and yaw by the pedestrian operating the trolley. The motor is controlled in a proportional or integral manner to accelerate, to decelerate, or to maintain a constant (cruise) velocity of the trolley. The acceleration, deceleration and velocity maintenance are achieved by ramping and constant voltages applied, preferably by a microprocessor-based control system, to a D.C. shunt motor which drives one or more wheels of the trolley.
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Ip Paul
Ley John R.
Phillips John B.
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