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    • 71. 发明授权
    • Electric generator
    • 发电机
    • US08432051B2
    • 2013-04-30
    • US12670542
    • 2008-07-25
    • Udaya Madawala
    • Udaya Madawala
    • H02P9/44F03D9/00
    • H02K17/42H02P9/46H02P2101/10H02P2101/15H02P2207/01
    • An electric power generator for generating a substantially constant frequency output from a varying mechanical speed input such as from a wind or water turbine, comprises a three-phase induction machine in which at least one stator winding is magnetically and electrically decoupled from at least one other stator winding which is arranged to be connected to an external load, and a power source is arranged to excite said at least one stator winding with an AC current at a desired output frequency. The power generator can be directly connected to the mains grid without requiring a power electronics rectifier and inverter stage to convert the generator output to constant frequency AC.
    • 一种用于从诸如风力或水力涡轮机的变化的机械速度输入产生基本上恒定的频率输出的发电机包括三相感应电动机,其中至少一个定子绕组与至少一个其他的磁性和电分离 定子绕组被布置成连接到外部负载,并且电源被布置成以期望的输出频率以交流电流激励所述至少一个定子绕组。 发电机可以直接连接到电网,而不需要电力电子整流器和逆变器级将发电机输出转换为恒定频率AC。
    • 72. 发明授权
    • Zero crossing detection for an electric power generation system
    • 发电系统的零交叉检测
    • US07557544B2
    • 2009-07-07
    • US11788924
    • 2007-04-23
    • John E. HeinzBrian G. Haupt
    • John E. HeinzBrian G. Haupt
    • H02P9/44G05F1/10
    • H02P9/42
    • One system of the present application includes an electric power generation device structured to provide an AC electric power output at a target frequency. This device includes: an electric power generator; a sensing arrangement structured to provide samples corresponding to magnitude of the AC electric power output; and a controller including operational logic responsive to the sensing arrangement to calculate a peak amplitude as a function of a waveform period corresponding to the target frequency and two of the samples separated in time by a target duration of 20 to 30 percent of the waveform period and determine a zero crossing of the output from the peak amplitude and the target frequency. The operating logic is further structured to control operation of the device in accordance with the zero crossing.
    • 本申请的一个系统包括构造成以目标频率提供AC电力输出的发电装置。 该装置包括:发电机; 感测装置,被构造成提供对应于交流电力输出的大小的样本; 以及控制器,其包括响应于感测装置的操作逻辑,以计算作为对应于目标频率的波形周期的函数的峰值幅度,以及在时间上分离的两个采样的波形周期的20至30%的目标持续时间, 确定输出与峰值幅度和目标频率的过零点。 操作逻辑被进一步构造以根据零交叉来控制设备的操作。
    • 73. 发明授权
    • Systems and methods involving variable speed generators
    • 涉及变速发电机的系统和方法
    • US07466109B1
    • 2008-12-16
    • US12098585
    • 2008-04-07
    • Einar Vaughn LarsenJames Michael FogartyCyrus David Harbourt
    • Einar Vaughn LarsenJames Michael FogartyCyrus David Harbourt
    • H02P9/44
    • H02P9/007
    • An electrical generation system comprising a generator. The generator including, a stator portion, and a rotor portion, and a variable frequency generator (VFG) exciter. The VFG exciter including, a first converter, operative to convert DC current to AC current connected to a DC link and a second converter, operative to convert DC current to AC current connected to the DC link. The system including a first switch operative, when closed, to connect the first converter to the stator portion while the generator is operating in a starting condition, wherein the first switch is open while the generator is operating in a running condition. The system including second switch operative, when closed, to connect the first converter and the second converter in parallel to the rotor portion while the generator is operating in a running condition, wherein the second switch is open while the generator is operating in the starting condition.
    • 一种发电系统,包括发电机。 发电机包括定子部分和转子部分,以及可变频率发生器(VFG)激励器。 VFG激励器包括第一转换器,用于将DC电流转换成连接到DC链路的AC电流和第二转换器,用于将DC电流转换为连接到DC链路的AC电流。 所述系统包括第一开关,当所述第一开关闭合时,所述第一开关在所述发电机起动状态下工作时将所述第一变换器连接到所述定子部分,其中所述第一开关在所述发电机运行时处于运行状态。 所述系统包括第二开关,当闭合时,当所述发电机在运行状态下工作时,所述第二开关在闭合时工作,以将所述第一转换器和所述第二转换器并联连接到所述转子部分,其中所述第二开关在所述发电机起动状态下工作时打开 。
    • 75. 发明授权
    • Frequency converter for high-speed generators
    • 变频器用于高速发电机
    • US07180270B2
    • 2007-02-20
    • US11324890
    • 2006-01-04
    • Alfred RuferMartin Veenstra
    • Alfred RuferMartin Veenstra
    • H02P9/44
    • H02J3/38H02M5/4585H02M7/487H02P9/30H02P2101/10
    • The present invention relates to a method and to a device for adapting the alternating current generated by a generator (1) and the alternating voltage generated by a generator (1) to a grid (8), whereby the generator (1) has at least one excitation coil (2). The power fed into the grid (8) can be flexibly adapted while entailing low switching losses in that a static frequency converter (9) is employed for the adaptation between the generator (1) and the grid (8), and in that, in order to control the power fed into the grid (8), means (3) are provided with which, on the one hand, the strength of the excitation field generated by the at least one excitation coil (2) is regulated and, on the other hand, the phase angle between the frequency converter voltage and the generator or grid voltage is appropriately controlled.
    • 本发明涉及一种用于使由发电机(1)产生的交流电和由发电机(1)产生的交流电压适配到电网(8)的方法和装置,由此发电机(1)至少具有 一个励磁线圈(2)。 馈电到电网(8)的功率可以灵活地适应,同时需要低的开关损耗,因为静态变频器(9)被用于发电机(1)和电网(8)之间的适应,并且在 为了控制馈送到电网(8)的电力,装置(3)被设置成一方面由至少一个励磁线圈(2)产生的励磁场的强度被调节,并且在 另一方面,适当地控制变频器电压与发电机或电网电压之间的相位角。