Baldor Electric Company

Abb Oy

Rui Qiao

Glenn Sterling Trammell

Glenn S Trammell

A secondary for a motor, for instance a linear drive motor, has a sheet of highly magnetic permeable material with a plurality of slots extending through the sheet spaced along a length of the sheet. The slots define a plurality of teeth in the sheet and enable the sheet to be conformable to a mounting surface when forming the secondary of the motor. The top surface of the sheet has a plurality of pockets formed adjacent the plurality of slots. The pockets extend parallel to the width and are spaced along the length of the sheet. The pockets form a sensor operatively connected to a control of the motor. The sensor may be an encoder, and/or the sensor may be operatively connected to a control for controlling commutation of the motor, and/or setting positional limits and/or 'home(s)' for the motor, providing absolute positional information and/or providing information about the sheet, for instance, the identity of one platen among many.

Secondary for linear drive motor comprising sheet of highly permeable magnetic material having synchronized motor teeth, encoder teeth, and commutation tracks integrally formed therein

A method for forming a secondary for a motor, for instance a linear drive motor, includes providing a sheet of highly magnetic permeable material with a plurality of slots extending through the sheet spaced along a length of the sheet. The slots define a plurality of teeth in the sheet and enable the sheet to be conformable to a mounting surface when forming the secondary of the motor. The top surface of the sheet has a plurality of pockets formed adjacent the plurality of slots. The pockets extend parallel to the width and are spaced along the length of the sheet. The pockets form a sensor operatively connected to a control of the motor. The sensor may be an encoder, and/or operatively connected to a control for controlling commutation of the motor, and/or setting positional limits, absolute positional information, and/or providing information about the sheet.

Method of forming a secondary for linear drive motor comprising sheet of highly permeable magnetic material having synchronized motor teeth, encoder teeth, and commutation tracks integrally formed therein

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Fort Smith, AR, United States of America

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