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Inverter for inductive power transmitter

A technology of inductive electric energy and inverter, applied in the direction of instruments, electrical components, circuit devices, etc., can solve the problems of inapplicable IPT system, increased volume, and extra cost of inverters.

Inactive Publication Date: 2016-07-13
APPLE INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this inverter requires an additional DC inductor to supply the inverter with a quasi-constant DC current
The DC inductor being a larger component adds significant volume to the inverter in addition to adding additional cost
Also, the resonant stage relies on a separate resonant inductor, which may not be suitable for IPT systems

Method used

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  • Inverter for inductive power transmitter
  • Inverter for inductive power transmitter
  • Inverter for inductive power transmitter

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Embodiment Construction

[0021] Before discussing the inverter of the present invention, it is useful to first consider an inductive power transfer (IPT) system. figure 1 A representative of IPT system 1 is shown. The IPT system includes an inductive power transmitter 2 and an inductive power receiver 3 . The inductive power transmitter is connected to a suitable power source 4, such as mains power. The inductive power transmitter may comprise an AC-DC converter 5 connected to an inverter 6 . The inverter supplies AC current to the transmitting coil or coil 7 so that the transmitting coil or coil generates an alternating magnetic field. In some configurations, the transmit coil can also be considered separate from the inverter. The transmitting coil or coils may be connected in parallel or in series with a capacitor (not shown) to create a resonant circuit.

[0022] figure 1 Also shown is the controller 8 in the inductive power transmitter 2 . A controller can be interfaced with each component o...

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Abstract

A push-pull inverter for an inductive power transmitter including a DC power supply that supplies power to a first and second branches; a resonant inductor connected between a first node on the first branch and a second node on the second branch; a first switch, switched by a first switching signal, connected between the first node and a common ground; and a second switch, switched by a second switching signal, connected between the second node and the common ground. The first switching signal is based upon the second node when the second node is low and based upon a DC source when the second node is high. The second switching signal is based upon the first node when the first node is low and based upon a DC source when the first node is high.

Description

technical field [0001] The present invention generally relates to an inverter. More specifically, the present invention relates to novel configurations of inverters suitable for use in inductive power transmitters. Background technique [0002] Electrical converters are found in many different types of electronic systems. Generally speaking, a converter converts a first type of supply into a second type of output. Such conversion may include: DC-DC, AC-AC, and DC-AC electrical conversion. In some configurations, a converter may have any number of DC and AC "components", for example, a DC-DC converter may include an AC-AC converter stage in the form of a transformer. [0003] Sometimes the term "inverter" may be used to specifically describe a DC-AC converter. Again, such an inverter may comprise other conversion stages, or the inverter may be a stage as in the case of a more conventional converter. Accordingly, the term inverter should be interpreted to include isolated...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/337H02M5/00H02H7/122H02M1/00H02M7/48H02M7/5383
CPCH02M3/3382H02M7/53832H02J50/12H02J7/00712H02J50/00Y02B70/10H02M1/0058H02M7/4815H02J50/80H02M1/44H02M7/53835H02M1/0048H02M7/538
Inventor 阿里·阿卜杜勒哈尼胡爱国
Owner APPLE INC
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