Ford Global Technolgoies, LLC

Yinghan Xu

Jiyao Wang

Wei Xu

Silong Li

In an electrified vehicle having a synchronous traction motor, an inverter is connected to stator windings by three power cables. If these cables are accidentally connected to the wrong windings, the resulting torque will not match the desired torque, and may even be in the wrong direction. To avoid this problem, a test is performed any time that the cables may have been unplugged and re-connected. The inverter is commanded to generate a rotating magnetic field while the rotor is held stationary, resulting in a positive and a negative response current. A relationship between a phase angle of the negative response current and the rotor position indicates which cables are connected to which windings. If the cables are incorrectly connected, the controller disables the motor and informs an operator which cables to swap to achieve correct connection.

Hybrid transmission wiring verification

An electric drive system for a vehicle includes an electric machine having first conductors arranged in slots of a stator to form phase windings and a second conductor arranged in the slots to form a secondary winding that produces a voltage indicative of a common mode voltage caused by voltages applied to the phase windings. The voltage can be used to supply power to electronic components and for diagnosis and control of the electric machine and an associated inverter.

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San Jose, CA, United States of America

Yinghan Xu