US 10,833,622 B2 · Hybrid transmission wiring verification

Abstract

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.

Claims17

Dependent claims

An electrified vehicle comprising:

a synchronous motor having a stator and a rotor;
an inverter connected to three stator windings by three cables;
and
a controller programmed to
command the inverter to establish a rotating magnetic field in the motor while the rotor is stationary,
measure a rotor position using a resolver,
sample a current response,
calculate a phase angle of a negative response current using a discrete Fourier transform, and
selectively preclude motive motor operation based on the current response on the cables and the position of the rotor, wherein the current response comprises an absolute value of a difference between the phase angle of the negative response current and twice the rotor position minus pi/2 being greater than a threshold.

6 more elements

Dependencies are inferred from the claim text.

Hybrid transmission wiring verification

Life of this patent

Hybrid transmission wiring verification

Life of this patent

Abstract

Claims17