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

摘要

The present invention is an encoder failure of a synchronous motor to determine the error if the phase angle depending on a comparison of the encoder signal and the phase angle and failure whether or not the encoder signal according to the Procedure of an encoder signal from the synchronous motor and the phase angle error is detected It relates to an apparatus and a detection method using him.; The present invention to accomplish this, when the predetermined signal type of the permanent magnet type synchronous electric motor 3 Encoder signal detection, the encoder signal detection unit for the phase voltage extracting a signal of the absolute encoder mounted on the rotor of the motor drive outputs for driving the reads the encoder signal is detected from the receiving provide a three-phase pulse signal and the phase angle information from the encoder state determining unit, and a synchronous motor type the permanent magnets to determine the failure or absence of the encoder is an error occurs in the phase angle of the pulse signal the determining phase that that is configured to determine the respective error add further comprising,; In addition, and to determine whether the six binary code represented by the following combination on the pulse signal of the encoder U, V, W signal by the signal of the negative or positive of the encoder according to the direction of rotation in progress in order of the synchronous motor , If the binary code is conducted in sequence according to the result of the process it is determined that a failure has occurred in the signal lines of the encoder corresponding to the number of said second binary code; And whether the U-phase, V-phase, respectively, of the value of the group determines whether within the range of the phase angle defines the error generation of the phase angle depending on the result on the W for a pulse signal the U, V, W of the encoder the process consists of being judged.; Accordingly, in order to detect the absolute position of a conventional rotor "U, V, W, A, B, Z" phase and the pulse signals it does not require all the same, be a configuration of hardware that can detect the pulse failure omitted it can be expected to reduce costs.