US 12,316,251 B2
Variable-speed drive for single-phase asynchronous motors
Manfred Horstmann, Pasadena, CA (US)
Assigned to HORSTMANN SYSTEMS CORPORATION, Pasadena, CA (US)
Filed by HORSTMANN SYSTEMS CORPORATION, Pasadena, CA (US)
Filed on Feb. 26, 2024, as Appl. No. 18/587,509.
Application 18/587,509 is a continuation of application No. 17/863,431, filed on Jul. 13, 2022, granted, now 11,916,497.
Application 17/863,431 is a continuation in part of application No. 17/529,233, filed on Nov. 17, 2021, abandoned.
Prior Publication US 2024/0195336 A1, Jun. 13, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H02P 23/00 (2016.01)
CPC H02P 23/00 (2013.01) 5 Claims
OG exemplary drawing
 
1. A control circuit for controlling a single-phase AC motor, comprising:
a quadrature oscillator configured to output a first sinusoidal signal and a second sinusoidal signal, the first sinusoidal signal and the second sinusoidal signal being out of phase;
a first circuitry configured to:
generate a first pulsing voltage based on the first sinusoidal signal;
generate a second pulsing voltage using the first pulsing voltage;
convert the second pulsing voltage to a first sine voltage; and
output the first sine voltage to a main winding of the single-phase AC motor; and
a second circuitry configured to:
generate a third pulsing voltage based on the second sinusoidal signal;
generate a fourth pulsing voltage using the third pulsing voltage;
convert the third pulsing voltage to a second sine voltage; and
output the second sine voltage to an auxiliary winding of the single-phase AC motor.