Abstract: The present invention is a permanent magnet synchronous submersible motor comprised of a motor stator and a rotor core. The motor stator includes a stator core formed by laminating a plurality of stator punching sheets. Each of the stator punching sheets is provided with an odd number of stator slots and any two of a X-phase coil, a Y-phase coil and a Z-phase coil are wound in each of the stator slots. The rotor core is formed by laminating a plurality of rotor punching sheets wherein each of the rotor punching sheets is provided with rotor slots and a permanent magnet inserted into each of the rotor slots. Furthermore, the permanent magnet submersible motor can be started with a conventional V/F controlled (variable frequency) converter.

Abstract: The present invention is a permanent magnet synchronous submersible motor comprised of a motor stator and a rotor core. The motor stator includes a stator core formed by laminating a plurality of stator punching sheets. Each of the stator punching sheets is provided with an odd number of stator slots and any two of a X-phase coil, a Y-phase coil and a Z-phase coil are wound in each of the stator slots. The rotor core is formed by laminating a plurality of rotor punching sheets wherein each of the rotor punching sheets is provided with rotor slots and a permanent magnet inserted into each of the rotor slots. Furthermore, the permanent magnet submersible motor can be started with a conventional V/F controlled (variable frequency) converter.

Abstract: A torque shaft, and couplings for connecting a progressing cavity pump and a driving part. The torque shaft, which accommodates the differing rotational motion of driver shaft and pump rotor, includes a shaft body and shaft heads both ends of the shaft body. The shaft heads have a transverse cross section of a hexagonal shape. An assembly for connecting a pump with a driving part which includes the above-mentioned torque shaft, a driver coupling, and a pump coupling and static components that connect the driving part housing to the progressing cavity pump stator. The connecting assembly includes provision for containing up thrust when the pump rotor rotation is reversed.