US 12,463,572 B2
Motor bus switching
Girish Potdar, Pune (IN); and Darshan Harish Bhatt, Amravati (IN)
Assigned to Eaton Intelligent Power Limited, Dublin (IE)
Filed by EATON INTELLIGENT POWER LIMITED, Dublin (IE)
Filed on Oct. 13, 2023, as Appl. No. 18/486,692.
Claims priority of application No. 202211058716 (IN), filed on Oct. 14, 2022.
Prior Publication US 2024/0128909 A1, Apr. 18, 2024
Int. Cl. H02P 23/10 (2006.01); H02P 27/08 (2006.01)
CPC H02P 23/10 (2013.01) [H02P 27/08 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A motor system, comprising:
a motor;
first and second power rails connected to a DC voltage input terminal;
a DC bus capacitor connected between the first and second power rails;
an inverter circuit including a first inverter leg, a second inverter leg and a third inverter leg, each of the first, second and third inverter legs including first and second power switches connected in series between the first and second power rails, the inverter circuit configured to selectively output energization signals to phase windings of the motor;
a DC link discharge circuit configured to monitor a voltage level of the DC bus capacitor; and
a bus switching circuit configured to selectively output one of a first DC voltage level or a second DC voltage level to the DC voltage input terminal in response to an output of the DC link discharge circuit.