公开(公告)号：US20150222330A1

公开(公告)日：2015-08-06

申请号：US14427821

申请日：2013-08-23

Applicant: ST-ERICSSON SA

Inventor： Harri Rapakko ,  Mikko Lintonen ,  Marko Pessa

IPC: H04B5/00 ,  H02J5/00

CPC classification number: H04B5/0037 ,  H02J5/005 ,  H02J7/025 ,  H02J17/00 ,  H02J50/12 ,  H02J50/80

Abstract: In a wireless power charger a receiver (6) is inductively coupled to a transmitter (1) to receive power for charging an accumulator in a device (11). The receiver (6) communicates charging data to the transmitter (1) by imposing current pulses across the direct current output terminals of a rectifier (9) in the receiver. To enhance the performance of the receiver without reducing the signal to noise ratio of the current pulse receiver to transmitter communication the shape of unwanted transient currents in a filter capacitor (10) are sensed and the transient current shape added to an ideal rectangular step function pulse shape to produce a communication pulse shape. As a result the communication pulse shape seen at a secondary inductor (7) of the receiver closely approximates the ideal rectangular step function shape desired whereby the signal to noise ratio is kept high. The receiver is particularly useful in mobile devices such as cell phones, tablet PC's and laptops.

Abstract translation: 在无线电力充电器中，接收器（6）感应耦合到发射器（1）以接收用于为设备（11）中的蓄电池充电的电力。 接收器（6）通过在接收器中的整流器（9）的直流输出端施加电流脉冲来将充电数据传送到发射器（1）。 为了在不降低当前脉冲接收器与发射器通信的信噪比的情况下提高接收机的性能，检测滤波电容器（10）中的不需要的瞬态电流的形状，并将瞬态电流形状加到理想的矩形步长函数脉冲 形状产生通信脉冲形状。 结果，在接收机的次级电感器（7）处看到的通信脉冲形状紧密地接近理想的矩形阶梯函数形状，由此使信噪比保持较高。 接收器在诸如手机，平板电脑和笔记本电脑的移动设备中特别有用。