Methods and Motor Computer Program Products for Motor Control by the Implementation of Damping for Over-Speed Conditions

A method for controlling the response of an electric steering system by implementing damping for over-speed conditions, the method comprising:

• receiving the velocity of an electric motor;
• calculating a voltage limit value;
• calculating a modulation index;
• determining a modulation index limit;
• determining a minimum modulation index value;
• applying the sign of the calculated modulation index to the determined minimum modulation index value;
• determining a limited modulation index value;
• utilizing the limited modulation index command value to generate a control signal;
• and
• applying the control signal to the electric motor in order to generate a braking torque in the electric steering system.

A computer program product that includes a computer readable medium useable by a processor, the medium having stored thereon a sequence of instructions which, when executed by the processor, causes the processor to control the response of an electric steering system by implementing damping for over-speed conditions by:

• receiving the velocity of an electric motor;
• calculating a voltage limit value;
• calculating a modulation index;
• determining a modulation index limit;
• determining a minimum modulation index value;
• applying the sign of the calculated modulation index to the determined minimum modulation index value;
• determining a limited modulation index command value;
• utilizing the limited modulation index command value to generate a control signal;
• and
• applying the control signal to the electric motor in order to generate a braking torque in the electric steering system.