| 摘要 |
<p>A brake mechanism (10) includes an inner assembly (10) secured to a motor shaft (8) and an outer assembly (14) surrounding the inner assembly (12). The outer assembly (14) includes a permanent magnet (102) or an electromagnet (24) between a pair of ferromagnetic pole structures (16, 18). The inner assembly (12) also includes a pair of ferromagnetic pole structures (30, 32). During operation of the brake mechanism (10), the inner assembly (12) is rotated relative to the outer assembly (14), and the pole structures cause a magnetic field within the inner assembly (12) to pulsate. The pulsating magnetic field causes the inner assembly (12) to apply a braking torque to the shaft (8).</p> |
