Inventors:
Chingchi Chen - Ann Arbor MI, US
Jin Wang - Northville MI, US
Michael W. Degner - Novi MI, US
Assignee:
Ford Global Technologies, LLC - Dearborn MI
International Classification:
H02P 1/00
US Classification:
318490, 318491, 318496, 318288, 318801
Abstract:
In a multi-phase motor drive that includes a bus capacitor, a multi-phase motor, a multi-phase inverter, multiple switches each having an on-state and an off-state, and multiple current sensors each being in series with respective phase winding, a method for checking the accuracy of circuit parameters of the motor drive, including using the switches to produce a first loop that includes the capacitor bank, a first phase winding, a first current sensor, a second phase winding, and a second current sensor, using the current sensors to determine a magnitude of current in the first and second phase windings, comparing a magnitude of current indicated by the first current sensor and the second current sensor, and determining a magnitude of a difference between the current in the first and second phase windings.