US 12,155,326 B2
System and method of wiper electric drive control using four quadrant operation
Muthukumar Murthy, Bangalore (IN); Ashok Kumar Thirunarayana, Karnataka (IN); Srividya Aryasomayajula, Karnataka (IN); and Rohini Kundanagar, Bangalore (IN)
Assigned to ROSEMOUNT AEROSPACE INC., Burnsville, MN (US)
Filed by Rosemount Aerospace Inc., Burnsville, MN (US)
Filed on Nov. 4, 2022, as Appl. No. 18/052,778.
Claims priority of application No. 202141053856 (IN), filed on Nov. 23, 2021.
Prior Publication US 2023/0163707 A1, May 25, 2023
Int. Cl. H02P 21/36 (2016.01); B64C 1/14 (2006.01); H02P 21/18 (2016.01); H02P 21/22 (2016.01); H02P 27/12 (2006.01)
CPC H02P 21/36 (2016.02) [B64C 1/1484 (2013.01); H02P 21/18 (2016.02); H02P 21/22 (2016.02); H02P 27/12 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A windshield wiper system comprising:
a three-phase motor;
a three-phase inverter comprising a positive direct current bus, a negative direct current bus, a plurality of high-side power switches, and a plurality of low-side power switches;
a brake circuit connected in parallel between the positive direct current bus and the negative direct current bus, the brake circuit comprising a brake power switch and a resistor connected in series with the brake power switch;
a controller operably connected to the three-phase motor, the three-phase inverter, and the brake circuit, the controller comprising a processor and a computer-readable memory encoded with instructions that, when executed by the processor, cause the controller to:
transmit first commutation signals to the high-side power switches and low-side power switches to thereby drive the motor according to a first speed profile associated with a first rotational direction of the motor;
transmit second commutation signals to the high-side power switches and low-side power switches to thereby drive the motor according to a second speed profile associated with a second rotational direction of the motor opposite the first rotational direction of the motor; and
transmit a first gate signal to the brake power switch to thereby close the brake power switch, wherein the controller sends the first gate signal based on a DC bus voltage and the first speed profile or the second speed profile, the DC bus voltage measured between the positive direct current bus and the negative direct current bus of the three-phase inverter.