Method and apparatus for DC motor speed control

Details Method and apparatus for DC motor speed control Method and apparatus for DC motor speed control

1989-01-19

1993-11-09

Shoop, Jr., William M.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

388903, 388915, 361 31, 318258, H02P 500

Patent

active

052610250

ABSTRACT:
In a preferred embodiment, a high-frequency, pulse-width-modulated, power-transistor, DC motor speed controller having current limiting in both drive and regenerative modes, essentially constant ramping rates regardless of whether or not the operator switches to neutral before changing direction, a simple sequencer which controls the timing of four functions--both drive and regenerative current measuring circuits and both drive and regenerative transistors, a highly effective transistor filter capacitor arrangement, and circuitry in which the level of regenerative current is used as an input to control the current under which the direction relays switch.

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