Amp LLC

John F Lill

Nelson E Neff

A stator for a stepper motor comprises a stator core having a plurality of coil supports on which coils are wound. Selected predetermined coils are connected in series by intermediate portions of the coil wires which extend around the periphery of the core. The end portions of the wires which extend from the series connected coils to terminal housings are connected to terminals in the housings. The lead wires which extend from the stator are also connected to the terminals in the housings. The stator is produced by a continuous winding process followed by a terminal insertion step in which the terminals are inserted into the terminal housings. The method substantially reduces the amount of labor required to produce the stator.

Stator for stepper motor

An electrical connecting means and overload protector mounting means for a motor stator comprises a housing having a plurality of terminal receiving cavities therein which receive the ends of the motor winding conductors. The cavities are dimensioned to receive electrical terminals of the type which have wire-receiving slots therein such that upon movement of the terminals into the cavities, the ends of the windings are electrically and mechanically connected to the terminals. The terminals are also connected to lead wires by means of which the control circuits to the motor are interconnected to the windings. The housing has integral supporting means for an overload protector, the arrangement being such that the protector is located adjacent to the motor windings. The electrical connections to the protector are also achieved by terminals which are inserted into cavities in the housing.

Interconnecting means for coil windings and overload protector

A terminal housing which is intended to be mounted on a motor stator comprises a housing member having a terminal-receiving face and a base surface which is directed in the opposite direction from the terminal-receiving face. The housing has an integral open rectangular mounting frame which comprises arms extending in opposite directions from the endwalls of the housing, parallel legs which extend from the ends of the arms, and a strut which extends between the ends of the legs. The housing and the integral mounting frame are dimensioned such that the housing can be mounted on one face of the stator with the legs extending across the circumferential surface of the stator and with the strut extending across the other face of the stator. When the stator is assembled to the motor housing, the frame is captured by the motor housing and flexed by the surface of the motor housing so that the terminal housing is firmly retained on the surface of the stator face.

Electrical connections for windings of motor stators

The electrical connections to the main winding and the auxiliary winding of an induction motor are made with three identical terminals, each of which has one wire-receiving slot means dimensioned to receive the wire of the main winding and another wire-receiving slot means which is dimensioned to receive the wire of the auxiliary winding. A terminal housing is used which has three cavities, one for each of the terminals. The housing has a wire-admitting slot means communicating with the first cavity which receives only one end of the main winding, a wire-admitting slot means which communicates with the second cavity and which receives only one end of the auxiliary winding. Two wire-admitting slots communicate with the third cavity and these slots receive the other ends of the main and auxiliary windings. Three identical terminals are crimped to lead wires so that when the terminals are inserted into the cavities, the required electrical connections will be made to the main and auxiliary windings of the motor.

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Harrisburg, PA, United States of America

John F Lill