US 12,334,840 B2
Variable speed constant frequency (VSCF) voltage regulation circuit for an aircraft
Lev Sorkin, Twinsburg, OH (US); Sergey Mischuk, Twinsburg, OH (US); and Boaz De-Medonsa, Twinsburg, OH (US)
Assigned to SAFRAN POWER USA, LLC, Twinsburg, OH (US)
Appl. No. 17/922,904
Filed by SAFRAN POWER USA, LLC, Twinsburg, OH (US)
PCT Filed May 5, 2020, PCT No. PCT/US2020/031408
§ 371(c)(1), (2) Date Nov. 2, 2022,
PCT Pub. No. WO2021/225580, PCT Pub. Date Nov. 11, 2021.
Prior Publication US 2023/0163698 A1, May 25, 2023
Int. Cl. H02M 7/538 (2007.01); H02M 1/00 (2006.01); H02M 7/5387 (2007.01); H02M 7/5395 (2006.01)
CPC H02M 7/53871 (2013.01) [H02M 1/0025 (2021.05); H02M 7/5395 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A variable speed constant frequency electric voltage regulation circuit for use in an aircraft, the circuit comprising:
a slow voltage loop including a rectifier and a sample and hold circuit, the slow voltage loop configured to detect an amplitude of an output signal of the circuit and adjust the amplitude of the output signal of the circuit;
a fast voltage loop including an error amplifier configured to detect a difference between a reference sine wave signal and the output signal;
a current control loop including a current controller and an inverter, wherein the current controller receives a feedback from an output of the inverter, a sawtooth reference signal, and a current controller reference signal from the fast voltage loop;
a first switch; and
a second switch,
wherein the first switch and the second switch are connected to the fast voltage loop,
wherein the first switch is configured to toggle a gain of the circuit between a gain associated with a normal mode and a gain associated with a power transfer mode based on a power transfer command signal, and
wherein the second switch is configured to toggle control between the current control loop in the power transfer mode and the fast and slow voltage loops in the normal mode.