US 12,231,070 B2
Minimizing dc-link current ripple and acoustic noise, and reducing DC-link capacitor requirement, for electric motors
Yilmaz Sozer, Peninsula, OH (US); Omer Gundogmus, Niskayuna, NY (US); Md Ehsanul Haque, Akron, OH (US); Anik Chowdhury, Akron, OH (US); and Shuvajit Das, Sterling Heights, MI (US)
Assigned to THE UNIVERSITY OF AKRON, Akron, OH (US)
Appl. No. 18/031,042
Filed by The University of Akron, Akron, OH (US)
PCT Filed Oct. 8, 2021, PCT No. PCT/US2021/054181
§ 371(c)(1), (2) Date Apr. 10, 2023,
PCT Pub. No. WO2022/076825, PCT Pub. Date Apr. 14, 2022.
Claims priority of provisional application 63/089,615, filed on Oct. 9, 2020.
Prior Publication US 2023/0378892 A1, Nov. 23, 2023
Int. Cl. H02P 6/10 (2006.01); H02P 21/20 (2016.01); H02P 21/22 (2016.01); H02P 27/08 (2006.01)
CPC H02P 6/10 (2013.01) [H02P 21/20 (2016.02); H02P 21/22 (2016.02); H02P 27/08 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method performed by a controller of an electric motor, the method comprising steps of:
generating control parameters, wherein the step of generating control parameters is selected from:
inputting a given reference torque (Tref) and a speed command to a torque generation lookup table (LUT) such that the step of generating the control parameters includes the torque generation lookup table at the given reference torque and the speed command; or
utilizing an analytical model that includes one or more analytical equations or one or more functions;
inputting the control parameters to a DC-link current ripple, torque ripple, and radial force ripple minimization lookup table;
inputting position to the DC-link current ripple, torque ripple, and radial force ripple minimization lookup table;
generating a reference current profile from the DC-link current ripple, torque ripple, and radial force ripple minimization lookup table; and
inputting the reference current profile to the electric motor.