| 摘要 |
<p>A stepper motor 10 (fig 1 not shown) has a rotor 20 and a stator 30. The stator 30 has a insulating stator body forming a central rotor chamber 341 and a plurality of stator pole support arms 342 extending radially from the central chamber 341 to outer portions 363 which stator body supports the stator poles. The stator poles comprise pairs of radially engaged stator pole components 36 mounted on a plurality of stator arms 342, the pole surface being formed by inner portions 361. The stator poles outer portions 363 are separated by a plurality of circumferential openings, allowing for winding coils to be wound on the stator poles from outside the stator 30. Subsequently a cylindrical outer ring is mounted about the stator which closes the magnetic circuit and act as a cover protecting the winding coils. Alternatively the pole portions may be axially engaged. The stator body supports terminal post 42 on an end face (fig 1) each phase being wound using a single wire. The rotor employs permanent magnets. Use of a reluctance rotor is also disclosed. An assembly method is described.</p> |
