发明名称 Safety Circuit and Brush Holder for Preventing Fault Conditions in an Alternator
摘要 A fault protection circuit for an alternator is provided for preventing faults such as a prolonged full-field condition in the alternator. The fault protection circuit includes a safety switch that is opened when the alternator output voltage becomes too high, as may occur during a full-field condition caused by an electrical short, or when some other fault is detected within the alternator. The opening of this safety switch disconnects a supply voltage feeding an excitation current control switch. The excitation current control switch normally adjusts an excitation current provided to a rotor in the alternator, in order to regulate a voltage output from the alternator. By providing a safety switch that disconnects the supply voltage for the rotor excitation in the alternator, the alternator output voltage may be prevented from reaching excessive levels that may damage devices in an electrical system and a battery coupled to the alternator.
申请公布号 US2016365813(A1) 申请公布日期 2016.12.15
申请号 US201514735831 申请日期 2015.06.10
申请人 Infineon Technologies AG 发明人 Graefling Martin;Seidl Christoph
分类号 H02P9/00 主分类号 H02P9/00
代理机构 代理人
主权项 1. A fault protection circuit for an alternator, comprising: a first switch having a first terminal electrically connected to a supply voltage, a second terminal electrically connected to a rotor in the alternator, and a third terminal, wherein the first switch is configured to provide an excitation current to the rotor as a function of an excitation current control signal applied to the third terminal and the supply voltage, so as to regulate an output voltage of the alternator; and a second switch electrically connected in series between the first terminal of the first switch and the supply voltage, the second switch configured to disconnect the supply voltage from the first terminal of the first switch, responsive to receiving a fault indication signal.
地址 Neubiberg DE