Offset compensation method of current sensor and motor driving system
AssigneeHyundai Motor Company
InventorsJae-Sang Lim, Seong Yeop Lim, Gu Bae Kang, Ji Wan Cha
Life of this patent
Estimating the term…
Abstract
An offset compensation method of a current sensor is provided for determining whether an offset compensation of the current sensor is abnormal, and a motor driving system includes the current sensor. The offset compensation method includes: compensating for an offset of the current sensor, and determining whether the offset compensation of the current sensor is abnormal.
Claims12
An offset compensation method of a current sensor arranged in a vehicle, comprising the steps of:
- compensating for an offset of the current sensor;
- and
- determining whether the offset compensation of the current sensor is abnormal,
- wherein in the step of determining whether the offset compensation of the current sensor is abnormal, the offset compensation is determined to be abnormal when a difference between a power module estimation temperature generated by a motor controller and a measured inverter temperature during stopping of the vehicle is greater than or equal to a first reference.
A motor driving system of a vehicle, comprising:
- an inverter including a motor controller;
- an inverter temperature sensor that senses a temperature of the inverter;
- and
- a current sensor that senses a current of a 3-phase power cable that connects the inverter with a motor,
- wherein the motor controller includes an offset compensation unit that performs an offset compensation of the current sensor, and an offset compensation abnormality determination unit that determines whether the offset compensation is abnormal, and
- the offset compensation abnormality determination unit determines that the offset compensation is abnormal when a difference between a generated power module estimation temperature and a measured inverter temperature during stopping of the vehicle is greater than or equal to a first reference.
An offset compensation method of a current sensor arranged in a vehicle, comprising the steps of:
- compensating for an offset of the current sensor;
- and
- determining whether the offset compensation of the current sensor is abnormal,
- wherein in the step of determining whether the offset compensation of the current sensor is abnormal, the offset compensation is determined to be abnormal when an increased speed of a measured inverter temperature is greater than or equal to a second reference during driving of the vehicle.
A motor driving system of a vehicle, comprising:
- an inverter including a motor controller;
- an inverter temperature sensor that senses a temperature of the inverter;
- and
- a current sensor that senses a current of a 3-phase power cable that connects the inverter with a motor,
- wherein the motor controller includes an offset compensation unit that performs an offset compensation of the current sensor, and an offset compensation abnormality determination unit that determines whether the offset compensation is abnormal, and
- the offset compensation abnormality determination unit determines that the offset compensation is abnormal when an increased speed of a measured inverter temperature is greater than or equal to a second reference during driving of the vehicle.
Dependencies are inferred from the claim text.