Primary for linear drive motor with solid steel stacks

摘要

A primary for a linear drive motor has a stage with stacks made from solid steel. Each stack has inner and outer teeth made that form a generally u-shaped cross-section for the stack. A magnet is disposed between the first and second stacks and a a coil wrapped between the first and second stacks. The stacks may be placed in a housing or may be formed as a housingless stage. The stacks and/or housing may be modified to selectively skew motor alignment to reduce motor cogging. The stacks may be contoured to follow various secondary forms. The stack inner and outer teeth lengths may be adjusted to help balance or optimize the magnetic circuit, to increase tooth surface area for increasing force, to allow more motor windings in the coil of the stack assembly, and to help locate the magnet and coil near the tooth surface.

主权项

1. A primary for a linear drive motor:
a stage comprising:
a first stack having an inner tooth with an interior surface and exterior surface and an outer tooth with an interior surface and an exterior surface, the inner and outer teeth being monolithically formed in the first stack, the inner tooth interior surface being spaced from the outer tooth interior surface so that the inner and outer teeth form a generally u-shaped cross-section for the first stack, the first stack being monolithically formed from a steel, the inner tooth having a tooth width defined by the inner tooth interior surface and inner tooth exterior surface, the outer tooth having a tooth width defined by the outer tooth interior surface and outer tooth exterior surface;a second stack having an inner tooth with an interior surface and exterior surface and an outer tooth with an interior surface and an exterior surface, the inner and outer teeth being monolithically formed in the second stack, the inner tooth interior surface being spaced from the outer tooth interior surface so that the inner and outer teeth form a generally u-shaped cross-section for the second stack, the second stack being monolithically formed from a steel, the inner tooth having a tooth width defined by the inner tooth interior surface and inner tooth exterior surface, the outer tooth having a tooth width defined by the outer tooth interior surface and outer tooth exterior surface;a magnet disposed between the first and second stacks adjacent the exterior surfaces of the inner teeth of the first and second stacks; anda coil wrapped between the first and second stacks with an inner diameter portion of the coil circumscribing the interior surfaces of the inner teeth of the first and the second stacks and an outer diameter portion of the coil adjacent the interior surfaces of the outer teeth of the first and the second stacks.