POWER TRANSMISSION DEVICE AND POWER RECEPTION DEVICE

• US 20160308399A1
• Filed: 04/15/2016
• Published: 10/20/2016
• Est. Priority Date: 04/17/2015
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Nakamura, Toru, Yamaguchi, Nobuhisa
• Granted Patent: US 9,887,592 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B60L 2210/30 AC to DC converters
• CPC Class Codes: B60L 2270/147 electro magnetic [EMI]
• CPC Class Codes: B60L 53/122 Circuits or methods for driving the primary coil, e.g. supplying electric power to the coil
• CPC Class Codes: H02J 2310/48 for electric vehicles [EV] or hybrid vehicles [HEV]
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 10/72 Electric energy management in electromobility
• CPC Class Codes: Y02T 90/12 Electric charging stations
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles

Abstract

An AC line filter is connected to an enclosure serving as a ground. A power transmission unit is configured to transmit electric power to a power reception device in a contactless manner. An inverter is provided between the AC line filter and the power transmission unit. A common mode filter is provided between the inverter and the power transmission unit. A Y capacitor of the common mode filter is not connected to the enclosure, but is connected to a power line between the AC line filter and the inverter.

Claims

1. A power transmission device comprising:

an AC line filter provided on an AC power line connected to an AC power supply, and connected to a ground;

an inverter configured to convert electric power supplied from the AC power supply through the AC line filter into electric power to be transmitted;

a power transmission coil electrically connected to the inverter, and configured to receive from the inverter the electric power to be transmitted and transmit the electric power to a power reception coil of a power reception device in a contactless manner; and

a common mode filter provided on a power line between the inverter and the power transmission coil,

the common mode filter including a first Y capacitor,

the first Y capacitor not being connected to the ground, but being connected to a power line between the AC line filter and the inverter.

2. The power transmission device according to claim 1, further comprising a rectifier circuit electrically connected between the AC line filter and the inverter, wherein

the first Y capacitor is connected to a DC power line between the rectifier circuit and the inverter.

3. The power transmission device according to claim 2, wherein

the rectifier circuit is a power factor correction circuit.

4. The power transmission device according to claim 2, further comprising a second Y capacitor provided on the DC power line and connected to the ground.

5. A power reception device comprising:

a power reception coil configured to receive electric power from a power transmission coil of a power transmission device in a contactless manner;

a rectifier configured to rectify the electric power received by the power reception coil;

a DC filter provided on a power line to which the electric power rectified by the rectifier is output, and connected to a ground; and

a common mode filter provided on a power line between the power reception coil and the rectifier.

the common mode filter including a first Y capacitor,

the first Y capacitor not being connected to the ground, but being connected to a power line between the rectifier and the DC filter.

6. The power reception device according to claim 5, further comprising a second Y capacitor provided on the power line between the rectifier and the DC filter and connected to the ground.