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1. 发明授权

US5170040A Device for supplying energy to a heated window pane from an electrical network of a motor vehicle 失效
标题翻译：从电动汽车电气网络向加热窗帘提供能量的装置
公开(公告)号：US5170040A
公开(公告)日：1992-12-08
申请号：US605116
申请日：1990-10-26
申请人： Rainer Wirtz , Wunibald Frey , Ralph-Gebhard Renk
发明人： Rainer Wirtz , Wunibald Frey , Ralph-Gebhard Renk
IPC分类号： B60R16/02 , B60R16/03 , B60S1/02 , H02M3/337 , H05B3/84
CPC分类号： H05B3/84 , B60S1/026 , H02M3/3372 , H05B1/0236 , B60R16/03 , H05B2203/035
摘要： The device for energizing a heating element of a window pane from a direct current network of a motor vehicle includes a converting device for converting the d.c. voltage of the direct current network into an alternating current voltage of a predetermined frequency and a resonant circuit connected to the output of the converting device having a Q-factor high enough to produce a low number of harmonics in operation. The resonant circuit has a resonant frequency corresponding to that of the alternating current voltage. The heating element is a part of a resistance of the resonant circuit. The converting device can include a control circuit for producing alternating control signals, a base driving circuit controlled by the control signals and having two outputs connected respectively to a base of a switching transistor. The device can also include a protecting circuit for picking up energy during opening of the respective switching transistors and returning the picked-up energy to the d.c. network.
摘要翻译：用于从机动车辆的直流网络供电窗玻璃的加热元件的装置包括用于转换直流电的转换装置。直流网络的电压成为预定频率的交流电压，以及连接到转换装置的输出的谐振电路，其具有足够高的Q因数，以在操作中产生低数量的谐波。谐振电路具有与交流电压相对应的谐振频率。加热元件是谐振电路的电阻的一部分。转换装置可以包括用于产生交流控制信号的控制电路，由控制信号控制的基极驱动电路，并且具有分别连接到开关晶体管的基极的两个输出。该装置还可以包括保护电路，用于在打开各个开关晶体管期间拾取能量并将拾取的能量返回到直流电。网络。

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