| 摘要 |
An induction machine having a stator carrying phase coils divided into at least two independently fed sets of coils, with a rotor or armature carrying one or more loop members, each of which is a short-circuited, continuous isolated loop conductor member having elements thereof positioned and received within the slots of the armature in a generally serpentine configuration forming at least two open loop portions, each loop portion being in a spatially related position to a corresponding coil of the stator structure, with each conductor element within a slot phasing or linking the fluxes of one stator pole. The machine may be single phase or polyphase. At least one stator phase coil of a set includes a controllable device in circuit relation therewith to enable control of one stator coil relative to the other, either in current magnitude or in current phase shift, the controllable device being either a silicon controlled rectifier or a triac. With the loop member, and by continuous control of the controllable device an approximately linear speed torque relation is obtained.
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