Method of detecting disconnection state of power cable in inverter system

摘要

Disclosed is a method of detecting the disconnection state of a power cable in an inverter system. The method includes detecting a battery voltage, detecting a DC-link voltage, detecting the disconnection state of the power cable based on a difference value between the detected battery voltage and the DC-link voltage, and stopping driving of a motor if the power cable is detected as being disconnected.

主权项

1. A method of detecting disconnection of a power cable in an inverter system, the method comprising:
driving of a motor; determining if a driving speed of the motor exceeds a reference speed; determining if a phase current instruction value to drive the motor is greater than a first reference value if the driving speed of the motor exceeds the reference speed; determining if an actual phase current applied to the motor is less than a second reference value if the phase current instruction value is greater than the first reference value; and turning off a main relay if the actual phase current is less than the second reference value and no longer driving the motor, wherein the first reference value is set to 50% of a theoretical current instruction value corresponding to a torque instruction; and wherein the second reference value is set to a value greater then zero.