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Non-contact power supply device

A non-contact power supply and electric power technology, applied in the direction of circuit devices, battery circuit devices, electrical components, etc., can solve problems such as difficult control

Pending Publication Date: 2020-09-22
ORMON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the SP method is generally more difficult to control than the primary series secondary series capacitor method (hereinafter referred to as the SS method) for constant voltage output on the power receiving side.

Method used

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Embodiment Construction

[0025] Hereinafter, a non-contact power supply device according to one embodiment of the present invention will be described with reference to the drawings. This non-contact power supply device has the same structure as the SPL system, thereby enabling bidirectional power supply.

[0026] The inventors of the present application have noticed that in the non-contact power supply device of the SPL system, when power is supplied from the secondary side to the primary side, the circuit on the secondary side (in this case, the power supply side) where the bias excitation phenomenon occurs Too much current flows in the device, and switching elements such as MOSFETs are sometimes damaged.

[0027] Therefore, this non-contact power supply device has a coil connected in series to the transmission coil in a device that resonates in parallel with a resonance capacitor for transmitting electric power (hereinafter referred to as a transmission coil) and has a coil connected in series with ...

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Abstract

A secondary device 3 of this non-contact power supply device has: a resonant circuit 20 having a second transmission coil 21 for transmitting power between a first transmission coil 13 of a primary device 2 and the second transmission coil 21, and a resonant capacitor 22 connected in parallel with the second transmission coil 21; a second conversion circuit 25 connected to the resonant circuit 20and performing conversion between AC power flowing through the resonant circuit 20 and DC power; a coil 24 connected between the resonant circuit 20 and the second conversion circuit 25 in series withthe second transmission coil 21; and a capacitor 23 connected between the second transmission coil 21 and the second conversion circuit 25 in series with the second transmission coil 21.

Description

technical field [0001] The present invention relates to a non-contact power supply device. Background technique [0002] So-called non-contact power feeding (also referred to as wireless power feeding) technology for transmitting electric power through space not via metal contacts or the like has been studied conventionally. [0003] As one of the non-contact power supply techniques, there is known a method of supplying power by electromagnetic induction. As a method of feeding power by electromagnetic induction, a primary series secondary parallel capacitor method (hereinafter referred to as SP method) is used (for example, refer to Non-Patent Document 1). In the SP method, a capacitor is connected in series to a coil operating as a part of the transformer on the primary side (transmitting side), and a capacitor is connected in parallel to a coil operating as another part of the transformer on the secondary side (receiving side). [0004] In the SP method, since a resonan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J50/12
CPCH02J50/12H02J7/02
Inventor 中尾悟朗野村笃司河合佑介财津俊行
Owner ORMON CORP
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