Electricity: motive power systems – Braking – Automatic and/or with time-delay means
Patent
1980-08-29
1982-10-26
Truhe, J. V.
Electricity: motive power systems
Braking
Automatic and/or with time-delay means
318334, 318350, 307420, H02P 518
Patent
active
043564380
ABSTRACT:
A motor speed control system utilizing a pulse duty controlling element including a core of an amorphous, magnetically soft material having a first and a second coil disposed thereon. A first set of pulses are applied to one end of the first coil while a constant voltage or a second set of pulses are applied to one end of the second coil. A duty controlled pulse is outputted from the other end of the first coil for supply to an electric motor. The other end of the second coil is connected to a current level controlling transistor, the base of which is connected to speed presetting means. The output pulse appearing at the other end of the first coil has a rising edge which lags behind the rising edge of a pulse in the first set of pulses by a time delay which depends on the degree of conduction of the transistor which is in turn determined by a preset value of the speed presetting means, and has a falling edge which is substantially synchronized with the falling edge of the pulse in the first set.
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Aisin Seiki Company Limited
Moose Richard M.
Truhe J. V.
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