A varnish injection system includes a varnish injector including a base, a nozzle extending from the base, and a spacer disposed on the nozzle, and an electric motor including a stator, a wire, and an insulating layer between the stator and the wire. The nozzle is arranged to deposit varnish between the stator and the insulating layer. The nozzle and the stator define a gap therebetween when the spacer engages the stator.

A varnish injection system includes a varnish injector including a base, a nozzle extending from the base, and a spacer disposed on the nozzle, and an electric motor including a stator, a wire, and an insulating layer between the stator and the wire. The nozzle is arranged to deposit varnish between the stator and the insulating layer. The nozzle and the stator define a gap therebetween when the spacer engages the stator.

An electric motor includes a stator, an insulating layer, and a wire. The stator includes a first circular laminate and a second circular laminate. The first laminate includes a first finger having a distal end extending toward a center point of the first circular laminate. The second laminate includes a second finger having a distal end extending toward a center point of the second circular laminate. The first and second fingers define a wall. The distal ends of the first and second fingers define a space therebetween. The insulating layer extends along the wall and into the space. The insulating layer is spaced from the distal end of the second finger. The wire extends along the insulating layer below the distal ends of the first and second fingers.

An electric motor includes a stator, an insulating layer, and a wire. The stator includes a first circular laminate and a second circular laminate. The first laminate includes a first finger having a distal end extending toward a center point of the first circular laminate. The second laminate includes a second finger having a distal end extending toward a center point of the second circular laminate. The first and second fingers define a wall. The distal ends of the first and second fingers define a space therebetween. The insulating layer extends along the wall and into the space. The insulating layer is spaced from the distal end of the second finger. The wire extends along the insulating layer below the distal ends of the first and second fingers.

A varnish application system includes an electric motor, a clamp, and a varnish injector. The clamp includes a beam, a first end plate fixed to the beam and engageable to a first end of the electric motor, and a second end plate releasably connected the beam and engageable to a second end of the electric motor. The varnish injector is arranged to apply varnish to the electric motor when the clamp engages the electric motor.

A varnish application system includes an electric motor, a clamp, and a varnish injector. The clamp includes a beam, a first end plate fixed to the beam and engageable to a first end of the electric motor, and a second end plate releasably connected the beam and engageable to a second end of the electric motor. The varnish injector is arranged to apply varnish to the electric motor when the clamp engages the electric motor.

A rotor magnet installation structure includes: a first shaft including a shrinkage-fit portion in which an accommodation space is formed; at least one magnet inserted in the accommodation space, an installation outer diameter of the magnet being greater than an inner diameter of the accommodation space before the magnet is inserted in the accommodation space; and a second shaft comprising a connection portion inserted in the accommodation space, an outer diameter of the connection portion being greater than the inner diameter of the accommodation space before the connection portion is inserted in the accommodation space.

A rotor magnet installation structure includes: a first shaft including a shrinkage-fit portion in which an accommodation space is formed; at least one magnet inserted in the accommodation space, an installation outer diameter of the magnet being greater than an inner diameter of the accommodation space before the magnet is inserted in the accommodation space; and a second shaft comprising a connection portion inserted in the accommodation space, an outer diameter of the connection portion being greater than the inner diameter of the accommodation space before the connection portion is inserted in the accommodation space.

A method of preheating an unfinished stator as an intermediate product before a stator as a final product for a motor is provided in order to preheat a mold for molding together with the unfinished stator in short time by using preheating facilities with simplified structures. In the method, the mold has a hollow and longitudinal barrel portion and a flange portion extending outward from an end of the barrel portion. The flange portion is arranged at a horizontal position to turn the barrel portion upward and an end of a cylindrical and longitudinal frame is put on the flange portion in a state where a core of the unfinished stator is fitted in the frame. A heat-resistant box of which an underside is opened covers the frame and the mold to surrounded outsides of the frame and the mold.

A method of preheating an unfinished stator as an intermediate product before a stator as a final product for a motor is provided in order to preheat a mold for molding together with the unfinished stator in short time by using preheating facilities with simplified structures. In the method, the mold has a hollow and longitudinal barrel portion and a flange portion extending outward from an end of the barrel portion. The flange portion is arranged at a horizontal position to turn the barrel portion upward and an end of a cylindrical and longitudinal frame is put on the flange portion in a state where a core of the unfinished stator is fitted in the frame. A heat-resistant box of which an underside is opened covers the frame and the mold to surrounded outsides of the frame and the mold.