US 11,807,111 B2
Electric drive system for a mower
Randall D. Thompson, Lancaster, SC (US); and Steven R. Huard, Greenville, TN (US)
Assigned to Parker-Hannifin Corporation, Cleveland, OH (US)
Filed by Parker-Hannifin Corporation, Cleveland, OH (US)
Filed on Jul. 15, 2022, as Appl. No. 17/865,672.
Application 17/865,672 is a continuation of application No. 16/861,382, filed on Apr. 29, 2020, granted, now 11,427,091.
Claims priority of provisional application 62/839,876, filed on Apr. 29, 2019.
Prior Publication US 2022/0363142 A1, Nov. 17, 2022
Int. Cl. B60L 50/14 (2019.01); A01D 34/00 (2006.01); A01D 101/00 (2006.01)
CPC B60L 50/14 (2019.02) [A01D 34/006 (2013.01); A01D 2101/00 (2013.01); B60L 2200/40 (2013.01); B60L 2210/40 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A vehicle comprising:
a source of direct current (DC) power;
a DC voltage bus coupled to the source of DC power and configured to transmit DC voltage generated by the source of DC power;
a power converter coupled to the DC voltage bus, wherein the power converter comprises a semiconductor switching matrix including a plurality of semiconductor switching elements configured to convert the DC voltage to three-phase electric power;
an electric motor coupled to the power converter and configured to receive the three-phase electric power, thereby generating a torque at an output shaft of the electric motor;
a commutator configured to receive a three-phase commutation feedback signal from the electric motor, and responsively generate respective activation signals for the plurality of semiconductor switching elements of the power converter; and
a wheel coupled to the output shaft of the electric motor and configured to be driven by the torque generated at the output shaft of the electric motor.