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公开(公告)号：US20190173403A1
公开(公告)日：2019-06-06
申请号：US16251035
申请日：2019-01-17
摘要： A power system includes a bus, a first controller and one or more second controllers. The first controller is configured to excite a first generator to generate electric power on the bus in response to initiation of rotation of the first generator. The one or more second controllers are configured to excite one or more respective second generators with a constant excitation in response to initiation of rotation of the first generator. The second generator(s) are electrically coupled with the bus and configured to operate as a motor to commence synchronous rotation with the first generator in response to electric power being present on the bus. The second controller(s) are further configured to initiate dynamic adjustment of the excitation of the second generator(s) to generate electric power on the bus with the second generator(s) in response to the first generator and the second generator(s) synchronously reaching a predetermined rotational speed.
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公开(公告)号：US20190165677A1
公开(公告)日：2019-05-30
申请号：US16111350
申请日：2018-08-24
发明人： Andrew Ferencz , Todd E. Takken , Paul W. Coteus , Xin Zhang
CPC分类号： H02M3/158 , H02M1/08 , H02M1/36 , H02M2001/0003 , H02M2003/1566 , H02P9/30
摘要： A power-delivery system may comprise a load device and a direct-current converter configured to deliver current to the load device when the direct-current converter is in an on state. The power-deliver system may comprise a voltage-measurement system configured to measure, at a beginning of each measurement cycle in a cyclic measurement pattern, a voltage at the load device. The power-deliver system may comprise a power controller configure to receive, at the beginning of each measurement cycle, the measurement of the voltage, and to perform, at the beginning of a control cycle in a cyclic control pattern, a voltage-control decision in response to a change in the measurement of the voltage being below a voltage-change threshold. The voltage-control decision may comprise whether to switch the state of the first direct-current converter. The cyclic control pattern may operate at a first frequency, and the measurement pattern may operate at a second frequency.
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公开(公告)号：US20190140571A1
公开(公告)日：2019-05-09
申请号：US16178631
申请日：2018-11-02
CPC分类号： H02P9/42 , F03D7/0272 , H02J3/01 , H02J3/386 , H02M1/12 , H02M2001/0025 , H02P9/02 , H02P9/30 , H02P29/50 , H02P2101/15
摘要： Provided is an arrangement for determining an operation parameter reference for controlling a generator side converter portion coupled to a generator, in particular of a wind turbine, the arrangement comprising: an arithmetic element configured to derive a fundamental current error by subtracting a, in particular unfiltered, generator output current from a sum of a fundamental current reference and at least one harmonic current reference; a fundamental current controller adapted to determine a fundamental operation parameter reference based on the fundamental current error; at least one other arithmetic element configured to derive at least one harmonic current error by subtracting a, in particular band pass filtered according to the harmonics, generator output current from the at least one harmonic current reference; at least one harmonic current controller configured to determine at least one harmonic operation parameter reference based on the harmonic current error.
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公开(公告)号：US10014807B2
公开(公告)日：2018-07-03
申请号：US15406631
申请日：2017-01-13
申请人： Deere & Company
发明人： Sumit Dutta , Lav Thyagarajan , Long Wu , Kent D. Wanner
摘要： A capacitor is connected between the direct current voltage terminals. Switched terminals of a first switch and a second switch are coupled in series, between the direct current voltage terminals. An electric machine or generator has one or more windings and a first phase output terminal associated with the switched terminals. A first set of blocking diodes are cascaded in series and second set of blocking diodes are cascaded in series. A first voltage supply provides a first output voltage level and a second output level switchable to the first control terminal, where the first output level is distinct from the second output level. A second voltage supply provides the first output voltage level and the second output level switchable to the second control terminal.
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公开(公告)号：US09837943B2
公开(公告)日：2017-12-05
申请号：US15103882
申请日：2014-12-12
IPC分类号： F03D9/00 , H02P9/04 , H02P9/40 , H02P9/10 , H02P9/30 , H02P21/24 , H02P9/02 , H02M3/335 , H02M5/42 , H02P101/15
摘要： Multiphase generator-conversion systems are disclosed. The system includes a multiphase generator having one rotor and m+1 number of electromagnetically coupled stators, each stator having a plurality of phase legs. The system includes a converter having m+1 conversion lines, each conversion line connected to the plurality of phase legs of one of the m+1 stators. Each conversion line has a rectification module. At most m of the m+1 rectification modules has an active filtering converter. At least one of the m+1 rectification modules has a passive rectifier. At least one of the active filtering converters is configured to directly control its current to vary the magnetic flux of the stator to which it is connected and indirectly affect the magnetic flux of the rest of the stators through the electromagnetic coupling. Also disclosed are wind turbines that include generation conversion systems and methods of mitigating harmonics in multi-phase generator-conversion systems.
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公开(公告)号：US20170110996A1
公开(公告)日：2017-04-20
申请号：US14885112
申请日：2015-10-16
申请人： Kohler Co.
发明人： Isaac S. Frampton , Adam Larson
摘要： A generator or another type machine includes a controlled field alternator, a segmented waveform converter, and a controller. The controlled field alternator is configured to generate a polyphase signal. The segmented waveform converter includes multiple switches connected between the polyphase signal of the controlled field alternator and an output filter. The controller is configured to provide a control signal for the switches based on measured electrical quantities associated with the output filter and provide a field current control signal to the controlled field alternator.
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公开(公告)号：US20170110976A1
公开(公告)日：2017-04-20
申请号：US15175761
申请日：2016-06-07
申请人： Kohler Co.
发明人： Isaac S. Frampton , Adam Larson , Terrence Rotter
CPC分类号： H02J50/10 , H02J7/1492 , H02M1/126 , H02M3/158 , H02M5/297 , H02M7/219 , H02M2001/007 , H02M2001/0077 , H02M2001/008 , H02P9/30 , H02P9/48
摘要： An apparatus includes a controlled field alternator or utility source of electrical power, a segmented waveform converter, and a controller. The source of electrical power is configured to generate a polyphase signal. The synchronous inverter includes multiple switches connected between the polyphase signal of the source of electrical power and an output filter. The controller is configured to provide a control signal for the switches based on measured electrical quantities associated with the output filter and may provide a field control signal to the controlled field alternator. The apparatus may be applied to a vehicle, a lawnmower, a zero turn radius lawnmower, or another type of machine.
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公开(公告)号：US09602192B2
公开(公告)日：2017-03-21
申请号：US14763014
申请日：2013-01-30
申请人： HITACHI, LTD.
发明人： Hiroshi Shinoda
摘要： An insulating transmission medium with high insulation reliability which transmits electromagnetic energy between circuits having different reference voltages, with low loss, in small size, and at low cost, and a communication apparatus which uses radio waves between a rotator and a stator to perform two-way communication between at least one rotator-specific communication device placed on a rotator. One stator-specific communication device is placed on a stator and is connected to multiple stator-specific antennas. The rotator-specific communication device is connected to at least one rotator-specific antenna, and includes a signal strength indicator. The stator-specific communication device includes a phase shifter which increases or decreases the phase angle of the signal by a phase shift amount in such a manner as that the signal strength is equal to or more than a predetermined value.
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9.发明授权公开(公告)号：US09590548B2
公开(公告)日：2017-03-07
申请号：US14669802
申请日：2015-03-26
申请人： Vasily Alekseyevich Syngaevskiy , Denis Sergeevich Shuvalov , Kirill Alexandrovich Treshchanovskiy
发明人： Vasily Alekseyevich Syngaevskiy , Denis Sergeevich Shuvalov , Kirill Alexandrovich Treshchanovskiy
摘要： A method of regulating an output voltage of an alternator. The method comprises measuring first and second external contacts of the alternator regulator module operably coupled to first and second output contacts of the alternator respectively during an ON state of an excitation cycle for the alternator, measuring a second voltage across the first and second external contacts of the alternator regulator module during an OFF state of an excitation cycle for the alternator, deriving an average voltage value of the first and second voltage measurements, and deriving an offset value based at least partly on the derived average voltage value.The method further comprises measuring an instantaneous voltage across the first and second external contacts of the alternator regulator module, and configuring a control signal for regulating the output voltage of the alternator based at least partly on the instantaneous voltage measurement and the derived offset value.
摘要翻译： 该方法还包括测量交流发电机调节器模块的第一和第二外部触点两端的瞬时电压，并且至少部分地基于瞬时电压测量和导出的偏移值来配置用于调节交流发电机的输出电压的控制信号。
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10.发明授权Method and device for operating an electrical machine having separate excitation 有权用于操作具有单独激励的电机的方法和装置公开(公告)号：US09531304B2
公开(公告)日：2016-12-27
申请号：US13990898
申请日：2011-09-30
申请人： Mercedes Herranz Gracia , Stefan Kolmorgen , Stefan Spannhake , Yves Challand , Daniel Raichle , Mario Beyer , Dragan Mikulec , Gunther Goetting , Alexander Scheidle
发明人： Mercedes Herranz Gracia , Stefan Kolmorgen , Stefan Spannhake , Yves Challand , Daniel Raichle , Mario Beyer , Dragan Mikulec , Gunther Goetting , Alexander Scheidle
CPC分类号： H02P6/08 , G05D23/20 , H02P9/30 , H02P9/48 , H02P29/666 , H02P2101/45
摘要： A method and a device for operating an electrical machine having separate excitation, especially a synchronous machine. With the aid of a sensor system, a variable characterizing a rotor temperature and/or a stator temperature are/is determined, and an excitation current and stator currents for the electrical machine are specified by a control unit as a function of the variable characterizing the rotor temperature and/or the stator temperature, at least in specifiable operating ranges.
摘要翻译： 一种用于操作具有单独激励的电机的方法和装置，特别是同步电机。 借助于传感器系统，确定表征转子温度和/或定子温度的变量，并且电机的励磁电流和定子电流由控制单元作为变量的函数来指定，其特征在于： 转子温度和/或定子温度，至少在可指定的工作范围内。
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