Shaft voltage test structure for permanent magnet synchronous motor

The utility model provides a voltage test structure for a permanent magnet synchronous motor shaft, which is used for rapidly detecting the voltage of a motor shaft, ensures the stable and reliable detection, is simple in structure and reduces the manufacturing cost. The motor comprises an end cover and a motor shaft, and the corresponding end side of the motor shaft protrudes out of the end cover, and is characterized by comprising a first semicircular hole cover, a second semicircular hole cover and a third semicircular hole cover, a second semicircular hole cover; the first semi-circular hole cover and the second semi-circular hole cover are spliced and sleeved at the axial position, laterally protruding out of the end cover, of the motor shaft, and are fixedly connected with the outer end surface of the end cover through fasteners respectively; a gap is reserved between an inner ring wall formed by combining the first semicircular hole cover and the second semicircular hole cover and a corresponding outer