Contactless power supply system and power transmission device

A power supply system, non-contact technology, applied in circuit devices, control devices, transportation and packaging, etc., can solve problems such as vehicle movement
CN106030980BActive Publication Date: 2018-04-24NISSAN MOTOR CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NISSAN MOTOR CO LTD
Publication Date
2018-04-24

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Abstract

A power transmitting device (10) having a power transmitting coil (14) and a power receiving device (40) having a power receiving coil (41) are provided. Then, electric power is transmitted from the power transmitting coil (14) to the power receiving coil (41) in a non-contact manner, and electric power is supplied to a battery (44) mounted on the power receiving device (40). The power transmission device (10) includes: a power factor calculation unit (31) that calculates a power factor (cosθ) based on a phase difference between a voltage and a current supplied to the power transmission coil (14); and a control amount calculation unit (29), It controls the power supplied to the power transmission coil (14) based on the power command value (Pbat*), and performs a function of suppressing the power supplied to the power transmission coil (14) when the power factor is equal to or less than a preset threshold power factor. Control of supplied power. Therefore, when the position of the power receiving coil (41) is displaced relative to the power transmitting coil (14), it is possible to immediately suppress the power to be transmitted.
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Description

technical field

[0001] The present invention relates to a contactless power supply system and a power transmission device for supplying electric power to a vehicle equipped with a battery, such as an electric car, in a contactless manner. Background technique

[0002] A non-contact power supply system has been proposed that supplies electric power to an electrical load mounted on a vehicle by supplying electric power from a power transmitting device installed on the ground side to a power receiving device installed on the vehicle side in a contactless manner. In such a non-contact power supply system, when the vehicle is parked at the power supply position to perform power supply, there are cases where the vehicle moves from the power supply position. In such a case, a misalignment occurs between the power transmitting coil and the power receiving coil, so it is necessary to immediately detect this misalignment to stop the supply of electric power.

[0003] As a technique f...

Claims

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