Contactless power supply system
First Claim
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1. A contactless power supply system, comprising:
- a power supply device, comprising;
inductive wires for an alternating current power supply at a predetermined frequency along a traveling path; and
a plurality of switching devices driven by square waves respectively converting direct current to alternating current with the predetermined frequency to supply the inductive wires, a moving object on the traveling path, comprising;
a power inducing coil that induces power through the inductive wires and supplies power to the moving object load; and
wherein the inductive wires are connected in series to a capacitor, and a variable inductor as a predetermined length of the inductive wires is not reached; and
wherein the inductive wires, connected in series to the capacitor and the variable inductor under the predetermined frequency result in a capacitive impedance.
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Abstract
A contactless power supply system that limits current to inductive wires, even when circuit load varies. The inductive wires are connected in series to a capacitor and a variable inductor to yield a capacitive impedance at a predetermined frequency f (e.g., 10 KHz). In doing so, a finite current at the predetermined frequency f can be asserted to the inductive wires even when circuit load is reduced to 0. Consequently the current fluctuation in the inductive wires is suppressed and the contactless power supply system becomes more manageable.
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Citations
4 Claims
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1. A contactless power supply system, comprising:
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a power supply device, comprising;
inductive wires for an alternating current power supply at a predetermined frequency along a traveling path; and
a plurality of switching devices driven by square waves respectively converting direct current to alternating current with the predetermined frequency to supply the inductive wires, a moving object on the traveling path, comprising;
a power inducing coil that induces power through the inductive wires and supplies power to the moving object load; and
wherein the inductive wires are connected in series to a capacitor, and a variable inductor as a predetermined length of the inductive wires is not reached; and
wherein the inductive wires, connected in series to the capacitor and the variable inductor under the predetermined frequency result in a capacitive impedance. - View Dependent Claims (2, 3, 4)
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Specification