Electric power steering apparatus and control method thereof

A control method, applied to an electric power steering apparatus, wherein the electric power steering apparatus comprises a first motor and a second motor;

• the first motor is powered by two power supplies, each of the two power supplies drives the first motor to generate a part of steering assistance corresponding to rotation of a steering wheel, and the second motor is driven by one power supply coupled from the two power supplies, to generate additional steering assistance;
• and
• the method comprises:
• shutting down the second motor when the first motor provides the steering assistance corresponding to the rotation of the steering wheel;
• and
• starting the second motor when the first motor loses part or all of the steering assistance corresponding to the rotation of the steering wheel.

A vehicle, comprising:

• an electric power steering apparatus, wherein the electric power steering apparatus comprises:
• a first motor, configured to provide steering assistance corresponding to rotation of a steering wheel, wherein the first motor is powered by two power supplies, and each of the two power supplies drives the first motor to generate part of the steering assistance;
• and
• a second motor, configured to provide additional steering assistance corresponding to the rotation of the steering wheel when the first motor loses part or all of the steering assistance, wherein the additional steering assistance comprises at least part of the steering assistance lost by the first motor, and the second motor is driven by an isolated power supplier that couples the two power supplies into one power supply, to generate the additional steering assistance.