| 摘要 |
<p>A method of magnetising members of magnetisable material (210) including presenting a magnetiser head to a circular array of the members (210) mounted on a rotor plate (200) of an electrical machine. The magnetiser head includes a circular array of coils (142), each coil (142) being positioned adjacent a respective one of the members (210). A current is supplied to selected juxtaposed pairs of the coils (142) so as to set up a magnetic field. Flux of the field forms a closed loop through the pair of coils (142) and the adjacent pair of members (210), such that uncontrolled flux leakage from this loop is minimised and such that the pair of members (210) are at least partially magnetised. Current is then passed through a second selected juxtaposed pair of the coils (142) so as to at least partially magnetise the respective adjacent pair of members (210), the second pair of coils (142) and the adjacent members (210) overlapping the first pair by one coil (142) and one member (210) respectively. Current is passed through successive pairs of coils (142), each overlapping with the respective previous pair (142), until all the members (200) are magnetised.</p> |
