Contactless power supply

• US 20050018452A1
• Filed: 06/10/2004
• Published: 01/27/2005
• Est. Priority Date: 06/11/2003
• Status: Abandoned Application

• Current Assignee: Winia Mando Incorporated
• Original Assignee: Winia Mando Incorporated
• Inventors: Seo, Wan Seok
• Application Number:
  US10/864,355
• Publication Number:
  US 20050018452A1
• Time in Patent Office: Days
• US Class Current: 363/16
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• CPC Class Codes: H02M 3/28 using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac

Abstract

A contactless power supply is provided, which includes a main body; a primary circuit having a power input portion receiving main power, a switching circuit having a plurality of direct-current (DC) converter, and a primary transformer, which is disposed in one-side of the main body; and a secondary circuit having a secondary transformer which is disposed at a predetermined distance from the primary circuit and receiving power from the primary transformer contactlessly, a peripheral circuit which filters and rectifies the power, and a power supply unit supplying the rectified power to a control system. As described above, the contactless power supply has a long life span of use and a characteristic of non-occurrence of mis-operations as well as an efficient power transfer function even at the state of a low coupling coefficient and a large leakage inductance, due to a contactless power transfer, in which a load-side power supply control system is designed in various schemes so as to be adapted in various ways.

Claims

1. A contactless power supply comprising:

a main body;

a primary circuit having a power input portion receiving main power, a switching circuit having a plurality of direct-current (DC) converter, and a primary transformer, which is disposed in one-side of the main body; and

a secondary circuit having a secondary transformer which is disposed at a predetermined distance from the primary circuit and receiving power from the primary transformer contactlessly, a peripheral circuit which filters and rectifies the power, and a power supply unit supplying the rectified power to a control system.

2. The contactless power supply of claim 1, wherein the primary and secondary transformers are made of a UU-shaped core, respectively.

3. The contactless power supply of claim 2, wherein a bobbin is mounted in both columns or the center of the UU-shaped core, respectively, and coils are wound in parallel connection with respect to each bobbin.

4. The contactless power supply of claim 3, wherein a core cross-sectional area of the secondary transformer is same as or larger than that of the primary transformer, between the cores of the primary and secondary transformers which oppose each other.