Motor Plant Virtual Tour

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Motor Plant Virtual Map Locations

1. Stamping

   Sheets of steel are fed into a punch press machine where stator and rotor laminations are stamped out to a predetermined size.

2. Laminations

   Individual stator and rotor laminations are made with notching equipment or single punch press depending on size and volume of the stator/rotor cores. As a quality check, the number of punching and notching operations of each die are recorded in order to maintain tight tolerances.

3. Welding

   The stator laminations are stacked and pressed together in a press. They are then held in place by either welding or metal banding depending on the size of the stator.

4. Frame Machining

   Toshiba sources high-grade raw castings for frames, bearing brackets, conduit boxes, fan covers, bearing caps, and other parts. Motor components are precisely machined in-house to tight tolerances to help ensure high quality control over every motor built.

5. Hot Drop

   After the inside of the rotor is burnished in preparation for shaft insertion, the rotor is placed on a conveyor that goes through an oven. After the shaft is inserted into the rotor, the rotor/shaft assembly is lowered into a water bath. This process shrink fits the rotor onto the shaft.

6. Copper Bar Rotors

   Pre-formed copper bars are inserted into slots of the rotor lamination stack with an interference fit. The swaging process expands the bars to create a tight interference fit. Medium voltage motors, 2300V and greater, are manufactured with copper bar rotors.

7. Raw Shafts

   Raw bar stock 1045 or 4142 steel are used to manufacture motor shafts. Each bar stock is cut down to length and faced to prepare it for turning on the lathe.

8. MVM Winding

   Flat rectangular-shaped copper wire is used to manufacture form wound stators. The number of turns that go into coils are based on motor designs. Form wound stators are typically found in medium and high voltage motors.

9. MVM VPI

   Inside the vacuum pressure impregnation (VPI) tank, vacuum pressure is applied while insulating varnish is added to the stator simultaneously. Insulating varnish is injected into every crevice of the stator winding.

10. LVM Winding

    Random winding, sometimes referred to as mush winding, and consisting of circular copper wire is inserted into the stator by hand or machine. Random winding is typically found in low voltage motors.

11. Oven

    Random wound stators go through the dip and bake process where the stators are loaded onto hooks and dipped in a varnish rated for Class H Insulation. Stators then pass through an oven, set to a certain temperature, and baked.

12. LVM Assembly

    The final assembly of low voltage motors consists of bearings pressed onto rotor/shaft assemblies. The rotor/shaft assemblies are then inserted into wound stator frames. End-bells, also known as bearing brackets, are installed, and followed by an installation of conduit and auxiliary boxes and other accessories.

13. Paint & Pack

    After motors pass a routine test, they are moved to the paint booth. After painting is complete, the motors are packaged into boxes or crates, depending on the dimensions and weights of the motors.

14. MVM Assembly

    The final assembly of medium voltage motors consists of bearings pressed onto the rotor/shaft assemblies. The rotor/shaft assemblies are then inserted into wound stator frames. End-bells, also known as bearing brackets are installed, and followed by an installation of conduit and auxiliary boxes and other accessories.

15. MVM Testing

    Motors are given a commercial routine test per IEEE-112 and Toshiba’s Routine Test procedures.