Electricity: motor control systems – Closed loop speed control system for dc motor with commutator – Armature control by digital or combined analog and digital...
Patent
1991-10-09
1993-11-30
Shoop, Jr., William M.
Electricity: motor control systems
Closed loop speed control system for dc motor with commutator
Armature control by digital or combined analog and digital...
318138, 318139, 318439, 318254, 388910, 388915, H02P 700
Patent
active
052673448
ABSTRACT:
A solid state DC power control circuit to efficiently use DC battery power without the normally associated energy waste which includes an input control signal, amplifying and conditioning circuit (133), a triangular waveform generator circuit (131), a comparator circuit (135), an inverting MOSFET (metal oxide semiconductor field effect transistor) circuit (137), and a plurality of power MOSFET devices (42), which together combine to translate a typical variable resistance control input into a voltage level and condition it suitably to be compared with a known triangular waveform thereby creating a pulse width modulated signal whose pulse widths correspond in duration to the relative percent "on" or "off" of the control input signal and which regulates a plurality of parallel MOSFET devices (42) which together share the load of an external DC power drain circuit (143).
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DAX Industries, Inc.
Martin David
Shoop Jr. William M.
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