Linear motor with commutation coil

Details Linear motor with commutation coil Linear motor with commutation coil

1999-07-06

2000-12-19

Ramirez, Nestor

Electrical generator or motor structure

Dynamoelectric

Linear

310 13, H02K 4100

Patent

active

061630918

ABSTRACT:
A linear motor supplying a nearly constant force along its entire length is presented. The linear motor includes two parallel magnet arrays having magnet strips of alternating magnetic polarity positioned along the length of the motor. A three-phase commutation coil is attached to a center pole such that individual coils are wrapped around the center pole. In some embodiments, the center pole runs the length of the motor and the three-phase commutation coil slides on the center pole. In other embodiments, the center pole is attached to the coils. The three-phase commutation coil includes any number of sets of three coils, each coil in the set carrying one of the three phases of current. A driver supplies three phases of current to the three-phase commutation coil in response to the position of the three-phase commutation coil relative to the magnet arrays.

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B. Brunelli et al., T-Shaped Lim Driven By A Three-Phase PWM AC Chopper, EPE Firenze 1991, pp. 1-492 through 1-499.
J.R. Hendershot, Jr., TJE Miller, Design of Brushless Permanent-Magnet Motors, (Motor and Controller Types), 1994, Page 2-31.

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