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    • 2. 发明授权
    • Field exerting and regulator circuit for a brushless alternator
    • 无刷交流发电机的励磁和调节电路
    • US4210857A
    • 1980-07-01
    • US897689
    • 1978-04-19
    • George K. Korbell
    • George K. Korbell
    • H02J7/16H02P9/30H02P9/26
    • H02P9/302H02J7/16
    • A field regulating circuit for a brushless alternator or the like in which a field winding is disposed on a rotor and energized from the secondary winding of a rotary transformer which has its primary winding connected to be energized from a circuit controlled by an oscillator and wherein the frequency of the oscillator is varied in response to a voltage sensing circuit providing a potential which varies with the output of the alternator, the output of the oscillator effecting the generation of first and second pulse trains with the trains being 180.degree. out of phase and effecting energization of the primary of the rotary transformer by current pulses of a fixed width with the current pulses caused by the first and second pulse trains flowing in different directions through the primary winding of the brushless transformer, the pulse trains have pulses of fixed duration which is substantially equal to a half period of the oscillation for the frequency of the oscillator for supplying full field current.
    • 一种用于无刷交流发电机等的场调节电路,其中励磁绕组设置在转子上并从旋转变压器的次级绕组通电,该旋转变压器的初级绕组从由振荡器控制的电路连接而被激励,并且其中, 振荡器的频率响应于电压感测电路而变化,该电压检测电路提供随交流发电机的输出而变化的电位,振荡器的输出影响产生第一和第二脉冲序列,其中火车相位相差180°,并实现 由具有固定宽度的电流脉冲使电流脉冲激励由第一和第二脉冲串引起的电流脉冲通过无刷变压器的初级绕组在不同方向上流动,脉冲串具有固定持续时间的脉冲, 基本上等于用于充满电的振荡器的频率的振荡的一半周期 励磁电流。
    • 3. 发明授权
    • Rotating alternator current generator system
    • 旋转交流发电机系统
    • US3673488A
    • 1972-06-27
    • US3673488D
    • 1971-05-17
    • GEN ELECTRIC
    • SPILLER WILLAIM H
    • H02P9/10H02P9/36H02P7/06H02P9/26
    • H02P9/105H02P9/36Y10S322/02
    • The invention relates to rotating alternating current generator systems. Generator excitation is normally controlled by varying the field current to the exciter. An SCR rectifier circuit responsive to exciter output voltage normally provides controlled direct current for the exciter field while a diode rectifier circuit responsive to exciter output current provides direct current only during transient conditions when the exciter voltage may be low. The current boost diode rectifier circuit is coupled to current transformers located in the exciter output lines. The current boost circuit including the current transformers is designed to take advantage of the characteristic of most alternators that its short-circuit excitation requirement is considerably less than its rated-load excitation requirement, for the same alternator line current. Some exciters, notably salientpole alternators, do not have the large separation between the short-circuit excitation condition and the rated-load excitation condition. Thus, it is difficult to design current transformers with a ratio low enough to insure that the current boost circuit will be regenerative under short-circuit conditions, and yet with a ratio high enough so that the current fed back will not interfere with the exciter field current supplied by the SCR circuit under normal operating conditions. A static switch, of unique design, is provided to insure compatibility between the SCR circuit and the diode rectifier circuit under normal operation, and yet permit the current feedback to be sufficient to support an exciter short circuit, regardless of the separation between the short circuit and rated-load circuit excitation conditions.
    • 本发明涉及旋转交流发电机系统。 发电机励磁通常通过改变励磁机的励磁电流来控制。 响应于激励器输出电压的SCR整流电路通常为激励器场提供受控的直流电,而响应激励器输出电流的二极管整流电路仅在激励器电压可能低的瞬态条件下提供直流电流。 电流升压二极管整流电路耦合到位于励磁机输出线路中的电流互感器。 包括电流互感器的电流升压电路被设计为利用大多数交流发电机的特性,即其相对于相同的交流发电机线路电流,其短路励磁要求明显小于其额定负载励磁要求。 一些兴奋剂,特别是凸极交流发电机,在短路励磁条件和额定负载激励条件之间没有很大的分离。 因此,难以设计电流互感器,其比例足够低,以确保电流升压电路在短路条件下将再生,而且具有足够高的比例,使得反馈的电流将不会干扰励磁场 在正常工作条件下由SCR电路提供的电流。 提供独特设计的静态开关,以确保在正常操作下SCR电路和二极管整流电路之间的兼容性,并且允许电流反馈足以支持励磁机短路,而不管短路之间的间隔 和额定负载电路励磁条件。