Power supply apparatus

Patent metadata

Field	Value
Publication number	US-12403773-B2
Application number	US-202318231356-A
Country	US
Kind code	B2
Filing date	Aug 8, 2023
Priority date	Aug 9, 2022
Publication date	Sep 2, 2025
Grant date	Sep 2, 2025

Abstract

A power supply apparatus mounted in a moving body includes: a pickup coil configured to generate induced electromotive force by an AC current flowing through a feeder line arranged along a moving route of the moving body; a power receiver configured to convert an AC power into a DC power; a capacitor connected to the output side of the power receiver; a circuit protector provided between the power receiver and the capacitor, and an electrical load; and an external power supply connector provided to allow connection of a DC external power supply to a first node between the circuit protector and the electrical load.

First claim

What is claimed is:

1. A power supply apparatus mounted in a moving body and receiving power in a contactless manner from a feeder line arranged along a moving route of the moving body and supplying the power to an electrical load of the moving body,
the power supply apparatus comprising:
a pickup coil configured to generate induced electromotive force by an alternating current flowing through the feeder line;
a power receiver configured to convert an alternating-current power received by the pickup coil into a direct-current power, the power receiver comprising a rectifier circuit and a voltage regulator;
a capacitor connected to a positive electrode and a negative electrode on an output side of the power receiver;
a first circuit protector provided between (i) the power receiver and the capacitor and (ii) the electrical load, wherein the power receiver and the capacitor are electrically upstream of the first circuit protector and the electrical load is electrically downstream of the first circuit protector; and
an external power supply connector provided to allow connection of a direct-current external power supply to a first node between the first circuit protector and the electrical load,

wherein the direct-current external power supply is connected to the external power supply connector when the moving body is moved to a position deviated from the moving route and cannot receive the power from the feeder line.

2. The power supply apparatus according to claim 1 , further comprising:
a second circuit protector between the first node and an internal circuit of the direct-current external power supply.

3. The power supply apparatus according to claim 1 , further comprising:
an electromagnetic switch connected to the first node and the electrical load, the electromagnetic switch controlled by a controller of the moving body and capable of cutting off electrical connection between the first node and the electrical load.

4. A power supply apparatus mounted in a moving body and receiving power in a contactless manner from a feeder line arranged along a moving route of the moving body and supplying the power to an electrical load of the moving body,
the power supply apparatus comprising:
a pickup coil configured to generate induced electromotive force by an alternating current flowing through the feeder line;
a power receiver configured to convert an alternating-current power received by the pickup coil into a direct-current power;
a capacitor connected to a positive electrode and a negative electrode on an output side of the power receiver;
a first circuit protector provided between (i) the power receiver and the capacitor and (ii) the electrical load; and
an external power supply connector provided to allow connection of a direct-current external power supply to a first node between the first circuit protector and the electrical load,
wherein:
the moving route is a rail suspended from a ceiling of a building,
the moving body is an overhead transport vehicle configured to move along the rail and transport an article,
a vertically moving device for removing the moving body from the moving route is provided in a specific place of the moving route, and
the direct-current external power supply is connectable to the external power supply connector after the moving body is removed from the moving route.

Assignees

• Daifuku Kk

Inventors

• Takimoto Hiroki

Classifications

• B60L2210/30

  AC to DC converters · CPC title

• B60L2200/26

  Rail vehicles · CPC title

• B65G1/0457

  with suspended load carriers · CPC title

• H02J50/12 Primary

  of the resonant type · CPC title

• B60L3/0069

  relating to the isolation, e.g. ground fault or leak current · CPC title