DETECTION METHOD USING BY APPARATUS FOR DETECTION AN ENCORDER DEFECT AND A PHASE ANGLE ERROR OF SYNCHRONOUS MOTOR

摘要

According to the present invention, the encoder fault and the phase angle error of the synchronous motor can be detected by checking whether the encoder signal line is faulty and the phase angle error according to the comparison between the encoder signal and the phase angle in accordance with the sequence of encoder signals in the synchronous motor. A detection method using a device.;To this end, in the present invention, six binary codes represented by a combination of signals of U, V, and W phases, which are pulse signals of an encoder, are sequentially performed by negative or positive signals of the encoder according to the rotation direction of the synchronous motor. Determining whether a failure occurs in a signal line of an encoder corresponding to the number of the binary code when the binary code does not proceed sequentially according to the resu And determining whether each value of the U phase, V phase, and W phase of the pulse signals of the encoder is within a range of a predetermined phase angle, and whether or not an error occurs in the phase angle according to the result. It is made of a process that is determined.;Accordingly, the pulse signals such as the "U, V, W, A, B, Z" phases are not required to detect the absolute position of the conventional rotor, and the configuration of hardware capable of detecting the pulse failure may be omitted. It can be expected to reduce costs.