NON-CONTACT POWER SUPPLY SYSTEM

• US 20130264886A1
• Filed: 03/06/2013
• Published: 10/10/2013
• Est. Priority Date: 04/06/2012
• Status: Abandoned Application

• Current Assignee: Hitachi Metals (Thailand) Ltd.
• Original Assignee: Hitachi Cable Limited (Proterial Ltd.)
• Inventors: KOTANI, Kazuo, CHIWATA, Naofumi, NAKATANI, Katsutoshi, SAGAWA, Masanori
• Application Number:
  US13/786,877
• Publication Number:
  US 20130264886A1
• Time in Patent Office: Days
• US Class Current: 307/104
• CPC Class Codes: H04B 5/266 One coil at each side, e.g. with primary and secondary coils
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer

Abstract

A non-contact power supply system for supplying power from a power transmission-side AC source to a power receiving-side load in a non-contact manner includes a power transmission-side resonance coil receiving AC power supplied from the AC source, a power receiving-side resonance coil having a resonant frequency causing electromagnetic-coupling to the power transmission-side resonance coil, a power transmission-side transformer disposed between the power transmission-side resonance coil and the AC source, and a power receiving-side transformer disposed between the power receiving-side resonance coil and the load.

Claims

1. A non-contact power supply system for supplying power from a power transmission-side AC source to a power receiving-side load in a non-contact manner, comprising:

a power transmission-side resonance coil receiving AC power supplied from the AC source;

a power receiving-side resonance coil having a resonant frequency causing electromagnetic-coupling to the power transmission-side resonance coil;

a power transmission-side transformer disposed between the power transmission-side resonance coil and the AC source; and

a power receiving-side transformer disposed between the power receiving-side resonance coil and the load.

2. The non-contact power supply system according to claim 1, wherein the power transmission-side transformer is configured such that the number of turns in a primary coil on the AC source side is less than the number of turns in a secondary coil on the power transmission-side resonance coil side, and

wherein the power receiving-side transformer is configured such that the number of turns in a primary coil on the power receiving-side resonance coil side is more than the number of turns in a secondary coil on the load side.

3. The non-contact power supply system according to claim 2, wherein the power transmission-side transformer is configured such that the number of turns in the secondary coil on the power transmission-side resonance coil side is not more than twice the number of turns in the primary coil on the AC source side, and

wherein the power receiving-side transformer is configured such that the number of turns in the primary coil on the power receiving-side resonance coil side is not more than twice the number of turns in the secondary coil on the load side.

4. The non-contact power supply system according to claim 2, wherein the number of turns in the primary coil on the AC source side of the power transmission-side transformer is the same as that in the secondary coil on the load side of the power receiving-side transformer, and

wherein the number of turns in the secondary coil on the power transmission-side resonance coil side of the power transmission-side transformer is the same as that in the primary coil on the power receiving-side resonance coil side of the power receiving-side transformer.

5. The non-contact power supply system according to claim 1, wherein the power transmission-side transformer and the power receiving-side transformer each comprise a toroidal transformer.