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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 9362048 B1

PDFFull Text
Date of Patent:
Jun. 07, 2016

Filed:

Mar. 08, 2012

Contactless power feed equipment

Applicant:

Masaaki Yamamoto, Osaka, JP;

Inventor:

Masaaki Yamamoto, Osaka, JP;

Assignee:

Daifuku Co., Ltd., Osaka, JP;

Attorney:

Kusner & Jaffe

Primary Examiner:

Rexford Barnie

Assistant Examiner:

Thai Tran

Int. Cl.
CPC ...
H02J 50/00 (2016.01); H02J 50/10 (2016.01); H02J 50/12 (2016.01); H02J 50/80 (2016.01); H01F 38/14 (2006.01); B60L 11/18 (2006.01); B60L 3/00 (2006.01); B60L 3/04 (2006.01);
U.S. Cl.
CPC ...
H01F 38/14 (2013.01); B60L 3/003 (2013.01); B60L 3/04 (2013.01); B60L 11/182 (2013.01); B60L 11/1833 (2013.01); B60L 2200/18 (2013.01); B60L 2210/10 (2013.01); B60L 2210/30 (2013.01); B60L 2210/40 (2013.01); B60L 2240/527 (2013.01); B60L 2240/529 (2013.01); Y02T 10/7005 (2013.01); Y02T 10/7072 (2013.01); Y02T 10/7216 (2013.01); Y02T 10/7241 (2013.01); Y02T 90/12 (2013.01); Y02T 90/121 (2013.01); Y02T 90/122 (2013.01); Y02T 90/125 (2013.01); Y02T 90/127 (2013.01); Y02T 90/14 (2013.01);
Abstract

At the start of power supply from a power supply device to an induction line, the oscillation frequency of an inverter of the power supply device is set at a predetermined frequency shifted from the resonance frequency of a resonant circuit. After a predetermined time, the frequency is changed from the predetermined frequency to the resonance frequency. Thus, at the start of power supply, only small power is obtained by the resonant circuits in all transport carriages from the induction line in a full-load condition. Thus, total power is suppressed within power that can be supplied by the power supply device, avoiding an overloaded condition of the power supply device.

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