US 12,445,079 B2
Motor control system for energizing a low-voltage motor from a high-voltage source
Martin Kovarik, Brno (CZ); Roman Kostka, Brno (CZ); and Michal Vavrda, Brno (CZ)
Assigned to HONEYWELL INTERNATIONAL, INC., Charlotte, NC (US)
Filed by HONEYWELL INTERNATIONAL INC., Charlotte, NC (US)
Filed on Oct. 16, 2023, as Appl. No. 18/487,641.
Prior Publication US 2025/0125760 A1, Apr. 17, 2025
Int. Cl. H02P 6/08 (2016.01); B60L 15/08 (2006.01); H02M 1/44 (2007.01); H02P 27/08 (2006.01)
CPC H02P 27/085 (2013.01) [B60L 15/08 (2013.01); H02P 6/08 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A motor control system, comprising:
a voltage source configured to supply a voltage at a maximum voltage magnitude;
a multi-phase motor having a motor voltage rating that is less than the maximum voltage magnitude, the multi-phase motor including a multi-phase stator and a rotor, each phase of the multi-phase stator configured to be energized to thereby generate a rotating magnetic field that causes the rotor to rotate; and
a motor control circuit coupled to the voltage source and to each phase of the multi-phase stator, the motor control circuit configured to energize each phase of the multi-phase stator with a voltage having a peak magnitude at or below the motor voltage rating voltage, the motor control circuit including:
a multi-phase inverter coupled to the voltage source and coupled to receive a duty-cycle control signal, the multi-phase inverter configured, in response to the duty-cycle control signal, to generate a plurality of pulse-width-modulated (PWM) voltages, each PWM voltage having a magnitude based on the duty-cycle control signal,
a multi-phase output filter circuit coupled to receive the PWM voltages and configured to supply the voltage to each phase of the multi-phase stator, and
a duty-cycle control circuit configured to generate and supply the duty-cycle control signal,
wherein the duty-cycle control signal and multiphase output filter ensure the peak magnitude of the voltage supplied to each phase of the multi-phase stator is at or below the motor voltage rating.