US 12,015,366 B2
Parallel synchronous machines with single motor drive
Lorenzo Mazza, Fort Smith, AR (US); Zubair Ali, New Berlin, WI (US); Toni Tuovinen, New Berlin, WI (US); and Brian Pisani, New Berlin, WI (US)
Assigned to ABB SCHWEIZ AG, Baden (CH)
Filed by ABB Schweiz AG, Baden (CH)
Filed on Apr. 8, 2022, as Appl. No. 17/658,621.
Prior Publication US 2023/0327583 A1, Oct. 12, 2023
Int. Cl. H02P 5/50 (2016.01); H02P 21/22 (2016.01); H02P 21/34 (2016.01)
CPC H02P 5/50 (2013.01) [H02P 21/22 (2016.02); H02P 21/34 (2016.02); H02P 2207/05 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A system comprising:
a single motor drive comprising,
an input comprising an input signal based on a user input,
an output comprising an output signal determined by the single motor drive, and
a sensor comprising:
a current sensor external to the single motor drive,
wherein only one sensor detects the output signal; and
a plurality of synchronous motors,
wherein the plurality of synchronous motors comprises being connected in parallel to the single motor drive, the plurality of synchronous motors having a similar load connected to each of the plurality of synchronous motors;
wherein the single motor drive receives the output signal from the sensor and controls the plurality of synchronous motors based on the input signal and an output current; and
wherein the sensor detects a power perturbation from the plurality of synchronous motors in the output signal and the single motor drive rejects the power perturbation to maintain the plurality of synchronous motors in synchronous operation.