Speed-and-phase control circuit for a rotary machine

Details Speed-and-phase control circuit for a rotary machine Speed-and-phase control circuit for a rotary machine

1978-07-28

1979-12-04

Smith, Jr., David

Electricity: motive power systems

Braking

Automatic and/or with time-delay means

318318, 318341, H02D 506

Patent

active

041774116

ABSTRACT:
A speed-and-phase control circuit for a rotary machine. A frequency divider is responsive to an input signal whose frequency is proportional to the revolution number of the rotary machine. The frequency divider provides as a first output signal a frequency-divided version of the input signal. A logical circuit is responsive to the input signal and to the first output signal. The logical circuit provides in timed relationship first, second and third timing pulses. The pulse width of the first timing pulse and of the second timing pulse is equal to a half period of the input signal. The pulse width of the second timing pulse is equal to one period of the input signal. The rising edge of the first timing pulse is substantially coincident with the falling edge of the input signal, the rising edge of the second timing pulse is substantially coincident with the falling edge of the first timing pulse, and the rising edge of the third timing pulse is substantially coincident with the falling edge of the second timing pulse. A charging circuit charges a first capacitor to a predetermined voltage level in response to the first timing pulse. A discharge circuit discharges according to the constant current mode the first capacitor circuit in response to the second timing pulse. A first gate circuit transfers the charge present on the first capacitor circuit to a second capacitor circuit in response to the second timing pulse. A second gate circuit transfer the charge present on the first capacitor circuit to a third capacitor circuit in response to a reference pulse having a reference phase. The speed and phase of the rotary machine is selectively controlled in accordance with the voltages present on the second and third capacitor circuits.

REFERENCES:
patent: 3478128 (1969-11-01), Grace
patent: 3609488 (1971-09-01), Sampson et al.
patent: 3952237 (1976-04-01), Kimizuka
patent: 4061950 (1977-12-01), Kayanuma

Affiliated with

Also associated with

Rating

Speed-and-phase control circuit for a rotary machine does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Speed-and-phase control circuit for a rotary machine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Speed-and-phase control circuit for a rotary machine will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-92746