Stepping motors with small step intervals

Patent metadata

Field	Value
Publication number	US-8970083-B2
Application number	US-200913124851-A
Country	US
Kind code	B2
Filing date	Sep 8, 2009
Priority date	Sep 8, 2009
Publication date	Mar 3, 2015
Grant date	Mar 3, 2015

Abstract

An improved motor ( 90 ) broadly including a first member ( 30 ) and a second member ( 20 ) mounted for movement relative to one another. The first member has a plurality of poles ( 32 ) spaced substantially equidistantly. The second member has a plurality of arms ( 22 ). Each arm includes a plurality of fingers ( 27 ), a permanent magnet ( 29 ), and a coil ( 25 ). The fingers are arranged such that their distal end generally faces toward the poles on the first member. Each permanent magnet has a width that is greater than the pole spacing. Each arm is associated with one of a number of phases. The fingers of the arms within a particular phase are arranged such that they simultaneously align with respective poles when the first and second members are in one position relative to one another.

First claim

What is claimed is:

1. A motor, comprising:
a first member;
a second member;
the members being mounted for movement relative to one another;
the first member having a plurality of poles;
the poles being spaced substantially equidistantly along the first member;
the second member having a plurality of arms;
each arm having a plurality of fingers, a monolithic permanent magnet positioned along the first member between at least two of the fingers, and a coil;
the finger…

Assignees

• Zhao Steve Zong-Ping
• Moog Inc

Inventors

• Zhao Steve Zong-Ping

Classifications

• H02K37/20 Primary

  Electricity · mapped topic

• H02K37/04

  Electricity · mapped topic

• H02K2213/03

  Electricity · mapped topic