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A transmitter for an inductive power transfer system

一种感应电能传输、感应电能的技术，应用在电磁波系统、电感器、变压器/电感器磁芯等方向，能够解决效率降低、损耗增加等问题

Inactive Publication Date: 2014-07-09
APPLE INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thus, in order to guarantee sufficient power transfer even if the device is located in the center of the case, the power on the primary side must be higher, which leads to increased losses and lower efficiency

Method used

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  • A transmitter for an inductive power transfer system
  • A transmitter for an inductive power transfer system
  • A transmitter for an inductive power transfer system

Examples

Experimental program
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Embodiment Construction

[0023] Coil arrangement

[0024] see figure 1 , shows a transmitter 1 of an IPT system according to an embodiment of the present invention. The transmitter takes the form of a charging housing 2 with side walls 3 and a base part 4 . The transmitter comprises a coil 5 which generates a time-varying magnetic field inside the housing. Arranged inside the housing is a device 6 comprising a receiving coil 7 which is inductively coupled to the time-varying magnetic field and generates an electrical current which can be used to charge or power the device. The coil is surrounded by the side walls of the housing and wound around the perimeter of the housing, coplanar with the base portion, as figure 1 shown by the dotted line in .

[0025] The transmitter 1 is connected to a suitable power source 8 and a drive circuit (not shown) is configured to drive the coil such that it generates a magnetic field. The drive circuit is configured such that the coil 5 produces a time-varying mag...

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PUM

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Abstract

An inductive power transfer transmitter that includes an enclosure for accommodating devices to be energised. The enclosure has one or more side walls and one or more coils for generating an alternating magnetic field within the enclosure. The density of the one or more coils varies with distance from an end of the one or more sidewalls. There is also disclosed an inductive power transmitter that includes one or more magnetically permeable layers wherein the combined thickness or the permeability of the one or more magnetically permeable layers varies.

Description

technical field [0001] The present invention is in the field of inductive power transfer (IPT) systems. More specifically, the present invention relates to power transmitters with novel configurations for use in such systems. Background technique [0002] IPT systems are a known domain of established technologies (eg wireless charging of electric toothbrushes) and developing technologies (eg wireless charging of handheld devices on 'charging pads'). Typically, the primary generates a time-varying magnetic field from a transmit coil or coils. This magnetic field induces an alternating current in a suitable receiving coil, which can then be used to charge a battery, or power a device or other load. In some cases, a resonant circuit can be created for a transmit or receive coil connected to a capacitor, whereby power throughput and efficiency can be increased at the corresponding resonant frequency. [0003] The basic problem to be overcome in the design of IPT system is to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F38/14H02J17/00
CPCH02J5/005H02J7/025H02J50/10H01F27/02H01F27/24H01F38/14H01F27/324H02J7/0044H02J50/402
Inventor 李昊
Owner APPLE INC
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