Motor driven power steering and method for driving the same
AssigneeHyundai Mobis Co., Ltd.
InventorSe Wook Oh
Life of this patent
Estimating the term…
Abstract
A motor driven power steering (MDPS) may include: a vehicle speed sensor configured to sense vehicle speed; a temperature sensor configured to sense a temperature of a power pack; a current sensor configured to sense an amount of current applied to the MDPS; a storage unit configured to store a thermal resistance value based on the vehicle speed with respect to the temperature of the power pack; and a control unit configured to calculate an estimated temperature by reflecting the thermal resistance value based on the vehicle speed with respect to the temperature of the power pack and the current amount applied to the MDPS into a temperature estimation function, and drive a motor according to the calculated estimated temperature.
Claims15
A motor driven power steering (MDPS) comprising:
- a power pack comprising a motor and a control unit;
- a vehicle speed sensor configured to sense a vehicle speed;
- a temperature sensor configured to sense a temperature at the power pack;
- a current sensor configured to sense a current applied to the motor;
- and
- the control unit configured to calculate an estimated temperature using the current from the current sensor and a thermal resistance value that is obtained using the vehicle speed and the temperature at the power pack, the control unit further configured to control driving of the motor using the estimated temperature.
A method for operating an MDPS that comprises a power pack, the method comprising:
- sensing a temperature at the power pack;
- sensing a vehicle speed;
- sensing a current applied to a motor of the MDPS;
- obtaining a thermal resistance value based on the vehicle speed and the temperature;
- calculating an estimated temperature using the current and the thermal resistance value;
- and
- controlling driving of the mother using estimated temperature.
Dependencies are inferred from the claim text.