Coupling with concentric contact around motor shaft for line start synchronous motor

A method comprising:

• accessing a line-start permanent magnet synchronous motor;
• accessing a load to be driven by the motor;
• operatively coupling the load to a shaft of the motor with a coupling;
• and
• driving the load from start to synchronous speed during steady state operation of the motor with the load coupled thereto;
• wherein the coupling has a motor shaft attachment portion and a load attachment portion, and the step of operatively coupling the load to the shaft includes placing the motor shaft attachment portion in concentric contact with the shaft of the motor and operatively connecting the load attachment portion to the load;
• and
• wherein the step of placing the motor shaft attachment portion in concentric contact with the shaft of the motor includes increasing a contact force between a first tapered surface of a first member of a bushing assembly and a second tapered surface of a second member of the bushing assembly that is complementary to the first tapered surface.

A method comprising:

• accessing a line-start permanent magnet synchronous motor;
• accessing a load to be driven by the motor;
• operatively coupling the load to a shaft of the motor with a coupling;
• and
• driving the load from start to synchronous speed during steady state operation of the motor with the load coupled thereto;
• wherein the coupling has a motor shaft attachment portion and a load attachment portion, and the step of operatively coupling the load to the shaft includes placing the motor shaft attachment portion in concentric contact with the shaft of the motor and operatively connecting the load attachment portion to the load;
• and
• wherein the step of placing the motor shaft attachment portion in concentric contact with the shaft of the motor includes configuring an interior diameter surface of the motor shaft attachment portion to provide an interference fit with the motor shaft.