Method for operating an electric motor for braking a vehicle, and control device for an electric motor designed at least for braking a vehicle

A control device for an electric motor which is designed at least for braking a vehicle, the control device comprising:

• an electronics unit which is designed for controlling the electric motor, taking into account at least one provided default signal concerning a setpoint speed change requested by a driver of the vehicle or an autonomous automatic control system of the vehicle, in such a way that a motor braking torque is exertable on at least one of:
• i) at least one wheel of the vehicle, and ii) at least one axle of the vehicle, with the aid of the controlled electric motor, so that the vehicle may be slowed/decelerated at least with the aid of the motor braking torque of the electric motor;
• wherein the electronics unit is additionally designed to:
• i) recognize whether the requested setpoint speed change is in a predefined normal range, taking the at least one default signal into account, ii) control the electric motor in such a way that a load to be applied by the electric motor remains less than or equal to a nominal load capacity of the electric motor, if the requested setpoint speed change is in the predefined normal range, and iii) control the electric motor in such a way that the load to be applied by the electric motor exceeds the nominal load capacity of the electric motor, at least during a predefined overload operation time interval, if the requested setpoint speed change is outside the predefined normal range.

An electric motor which is designed at least for braking a vehicle, the electric motor including a control device comprising:

• an electronics unit which is designed for controlling the electric motor, taking into account at least one provided default signal concerning a setpoint speed change requested by a driver of the vehicle or an autonomous automatic control system of the vehicle, in such a way that a motor braking torque is exertable on at least one of:
• i) at least one wheel of the vehicle, and ii) at least one axle of the vehicle, with the aid of the controlled electric motor, so that the vehicle may be slowed/decelerated at least with the aid of the motor braking torque of the electric motor;
• wherein the electronics unit is additionally designed to:
• i) recognize whether the requested setpoint speed change is in a predefined normal range, taking the at least one default signal into account, ii) control the electric motor in such a way that a load to be applied by the electric motor remains less than or equal to a nominal load capacity of the electric motor, if the requested setpoint speed change is in the predefined normal range, and iii) control the electric motor in such a way that the load to be applied by the electric motor exceeds the nominal load capacity of the electric motor, at least during a predefined overload operation time interval, if the requested setpoint speed change is outside the predefined normal range.

A braking system for a vehicle, the braking system including a control device, the control device comprising:

• an electronics unit which is designed for controlling the electric motor, taking into account at least one provided default signal concerning a setpoint speed change requested by a driver of the vehicle or an autonomous automatic control system of the vehicle, in such a way that a motor braking torque is exertable on at least one of:
• i) at least one wheel of the vehicle, and ii) at least one axle of the vehicle, with the aid of the controlled electric motor, so that the vehicle may be slowed/decelerated at least with the aid of the motor braking torque of the electric motor;
• wherein the electronics unit is additionally designed to:
• i) recognize whether the requested setpoint speed change is in a predefined normal range, taking the at least one default signal into account, ii) control the electric motor in such a way that a load to be applied by the electric motor remains less than or equal to a nominal load capacity of the electric motor, if the requested setpoint speed change is in the predefined normal range, and iii) control the electric motor in such a way that the load to be applied by the electric motor exceeds the nominal load capacity of the electric motor, at least during a predefined overload operation time interval, if the requested setpoint speed change is outside the predefined normal range.