| 摘要 |
A system is provided for transmitting a.c. electrical power across a small, even gap, without any physical contact, from a primary pole system to a secondary pole system, one of which moves relative to the other. Relative movement between the pole system may be rotational as when the primary and secondary pole systems are coaxial, or may involve translational linear motion as when there is an elongate primary pole system and an elongate parallel secondary pole system. The purpose, whether the relative motion is rotational or translational, is to transfer electrical power at a controlled frequency, voltage, and current level across the gap for utilization at the relatively moving poles/elements of the system. The magnetic field across the gap between the primary and secondary pole systems is always changing in accordance with the power supplied to the primary coils and this changing field remains continuous throughout the distance traveled by the secondary poles.
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