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1. 发明授权

US10790773B2 Doubly fed induction motor 有权
公开(公告)号：US10790773B2
公开(公告)日：2020-09-29
申请号：US16078026
申请日：2017-01-30
申请人： NRG TECH LTD.
发明人： Lachezar Lazarov Petkanchin
IPC分类号： H02P23/08 , H02P9/00 , H02P23/20
摘要： Electric motor, in particular induction motor, comprising a stator, a rotor and a control device which is arranged at the rotor. The three rotor windings are connected to a Rotor Control device with inverter and controller unit mounted on the rotor. A capacitor is placed in the DC link. The capacitor is supplied from the EMF induced in the rotor. The current in the rotor windings is advanced in order to achieve a 90 degree phase shift between rotor current and stator MMF vector. To achieve this the frequency and amplitude of the rotor current as well as the phase shift can be varied. Wherein the frequency of the rotor inverter is matching the slip frequency.

2. 发明授权

US10432126B2 Control device for an asynchronous machine and method for operating an asynchronous machine 有权
公开(公告)号：US10432126B2
公开(公告)日：2019-10-01
申请号：US15551652
申请日：2016-01-13
申请人： Robert Bosch GmbH
发明人： Martin Hennen
IPC分类号： G01H3/00 , H02P6/10 , H02P23/08 , H02P1/00 , H02P27/06
摘要： The invention relates to a method for operating an asynchronous machine comprising the steps: determining an operating point trajectory for the asynchronous machine for a plurality of desired torques of the asynchronous machine by calculating 2-tuples from longitudinal current values and cross current values in a synchronously rotating coordinate system of the asynchronous machine; calculating a slip frequency of the asynchronous machine for each of the 2-tuples calculated from longitudinal current values and cross current values; determining a current rotor speed of the asynchronous machine; calculating an excitation frequency of the asynchronous machine by summation of the calculated slip frequency and the current rotor speed weighted with the number of pole pairs of the asynchronous machine; and comparing the calculated excitation frequency of the asynchronous machine with at least one predetermined resonance frequency value of the asynchronous machine. The determined operating point trajectory is thereby corrected by changing the ratio between longitudinal current value and cross current value at a constant desired torque for each of the 2-tuples for which the calculated excitation frequency corresponds to the at least one resonance frequency value.

3. 发明授权

US10277143B1 Inverter supplying power to induction motor for driving hoist 有权
公开(公告)号：US10277143B1
公开(公告)日：2019-04-30
申请号：US15958201
申请日：2018-04-20
申请人： LSIS CO., LTD.
发明人： Eun-Woo Lee , Jung-Han Kim
IPC分类号： H02M5/40 , H02M7/48 , B66C13/26 , H02P23/08 , H02P27/04 , H02P27/06 , H02P6/08 , H02P25/062
摘要： The present disclosure relates to an inverter provided in a hoist system, which includes a scale unit configured to control a size of a DC link voltage of the inverter, a proportional-integral (PI) controller configured to perform PI-control on an output of the scale unit and an output voltage of the inverter and outputting a control signal, a first calculating unit configured to sum a command frequency of the inverter and the control signal, and a voltage determining unit configured to determine an output voltage of the inverter from an output frequency of the first calculating unit.

4. 发明授权

US10116239B2 Single phase motor energy economizer for regulating the use of electricity 有权
公开(公告)号：US10116239B2
公开(公告)日：2018-10-30
申请号：US15218116
申请日：2016-07-25
申请人： Protective Energy Economizer Technology
发明人： Mario Marcelo Marcoccia
IPC分类号： H02P1/24 , H02P1/02 , H02P1/42 , H02P23/02 , H02P23/08 , H02P23/26 , G05B19/042 , H02H7/09 , H02H11/00
摘要： A system for reducing inrush loading when a source power is restored includes a device for switching power that selectively connects a load to the source of power and a circuit for measuring the AC voltage at the source and for determining when the AC voltage is within operating range. Responsive to the AC voltage being within operating range, the system delays for a time period then connects the load to the source of power by way of the device for switching power.

5. 发明授权

US09843283B2 Control device of rotating electric machine and method for controlling the same 有权
公开(公告)号：US09843283B2
公开(公告)日：2017-12-12
申请号：US14892119
申请日：2014-05-19
申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA
发明人： Takashi Ota , Youhei Yamada
IPC分类号： H02P23/08 , H02P21/00
CPC分类号： H02P23/08 , H02P21/0025
摘要： An electronic control unit includes calculating a slip frequency of a rotating electric machine from a torque instruction value to the rotating electric machine and a target value of output efficiency to the rotating electric machine, calculating a frequency of the instruction signal from the slip frequency and a rotational frequency of the rotating electric machine, the slip frequency being changed by changing the target value of the output efficiency with the torque instruction value maintained and changing the slip frequency so as to change the frequency of the instruction signal to out of an inverter lock frequency band when the frequency of the instruction signal is included in the inverter lock frequency band.

6. 发明授权

US09641116B2 Method and device for operating an asynchronous machine, and an asynchronous machine 有权
公开(公告)号：US09641116B2
公开(公告)日：2017-05-02
申请号：US14901437
申请日：2014-06-04
申请人： Robert Bosch GmbH
发明人： Manfred Weiffen
IPC分类号： H02P1/24 , H02P23/08 , H02P27/06
CPC分类号： H02P23/08 , H02P27/06
摘要： The invention relates to a method for operating an asynchronous machine (1) comprising a rotor (3) and a stator (2), in which a torque of the asynchronous machine (1) is adjusted by specifying a desired magnetic flux of a surrounding magnetic field of the stator (2) and specifying a desired slip between a rotational speed of the rotor (3) and the rotational speed of the surrounding magnetic field. According to the invention, at least in the load condition and when a rotary frequency of the surrounding magnetic field of the stator is equal to zero, the desired magnetic flux and/or the desired slip with constant torque is changed in such a way that an actual rotary frequency of the surrounding magnetic field is not equal to zero.

7. 发明申请

US20160276971A1 METHODS OF AUTO TUNING MACHINE PARAMETERS AND SYSTEMS THEREOF 审中-公开
标题翻译：自动调谐机参数及其系统的方法
公开(公告)号：US20160276971A1
公开(公告)日：2016-09-22
申请号：US14658804
申请日：2015-03-16
申请人： Lav THYAGARAJAN , Long WU , Tianjun FU
发明人： Lav THYAGARAJAN , Long WU , Tianjun FU
IPC分类号： H02P23/08 , H02P25/02 , H02P23/30
CPC分类号： H02P23/08 , H02P21/14 , H02P23/30 , H02P25/02
摘要： In one example embodiment, a method includes determining a first adjustment value for a slip frequency of a rotor in an induction motor, determining a second adjustment value for an inductance of the induction motor and tuning the slip frequency of the rotor and the inductance of the induction motor based on the first adjustment value and the second adjustment value, respectively.
摘要翻译：在一个示例性实施例中，一种方法包括确定感应电动机中转子的转差频率的第一调整值，确定感应电动机的电感的第二调整值并调整转子的转差频率和感应电动机分别基于第一调整值和第二调整值。

8. 发明授权

US09431949B2 Induction motor speed estimation 有权
标题翻译：感应电机速度估算
公开(公告)号：US09431949B2
公开(公告)日：2016-08-30
申请号：US14264332
申请日：2014-04-29
申请人： General Electric Company
发明人： Pinjia Zhang , Prabhakar Neti , Patel Bhageerath Reddy
IPC分类号： H02P23/00 , H02P25/00 , H02P27/00 , H02P23/08 , H02P23/14 , H02P27/02
CPC分类号： H02P23/08 , H02P21/18 , H02P23/14 , H02P23/16 , H02P27/026 , H02P29/0241
摘要： A method for estimating a speed of an induction motor includes applying a voltage to the induction motor and measuring a current of the induction motor. A current fast fourier transform (FFT) of the current is then determined and a slip of the induction motor is calculated based on the current FFT. A speed of the induction motor is then estimated based on the slip of the induction motor.
摘要翻译：用于估计感应电动机的速度的方法包括向感应电动机施加电压并测量感应电动机的电流。然后确定电流的当前快速傅立叶变换（FFT），并且基于当前FFT来计算感应电动机的滑差。然后基于感应电动机的滑移来估计感应电动机的速度。

9. 发明申请

US20160156298A1 METHOD AND DEVICE FOR OPERATING AN ASYNCHRONOUS MACHINE, AND AN ASYNCHRONOUS MACHINE 有权
标题翻译：用于操作异步机的方法和装置，以及异步机
公开(公告)号：US20160156298A1
公开(公告)日：2016-06-02
申请号：US14901437
申请日：2014-06-04
申请人： ROBERT BOSCH GMBH
发明人： Manfred Weiffen
IPC分类号： H02P23/08
CPC分类号： H02P23/08 , H02P27/06
摘要： The invention relates to a method for operating an asynchronous machine (1) comprising a rotor (3) and a stator (2), in which a torque of the asynchronous machine (1) is adjusted by specifying a desired magnetic flux of a surrounding magnetic field of the stator (2) and specifying a desired slip between a rotational speed of the rotor (3) and the rotational speed of the surrounding magnetic field. According to the invention, at least in the load condition and when a rotary frequency of the surrounding magnetic field of the stator is equal to zero, the desired magnetic flux and/or the desired slip with constant torque is changed in such a way that an actual rotary frequency of the surrounding magnetic field is not equal to zero.
摘要翻译：本发明涉及一种用于操作包括转子（3）和定子（2）的异步电机（1）的方法，其中异步电机（1）的扭矩通过指定周围磁体的期望磁通量来调节并且确定转子（3）的旋转速度与周围磁场的旋转速度之间的期望滑差。根据本发明，至少在负载条件下，当定子的周围磁场的旋转频率等于零时，具有恒定转矩的所需磁通量和/或期望的滑差以这样的方式改变：周围磁场的实际旋转频率不等于零。

10. 发明授权

US09190947B2 Electric power tool 有权
标题翻译：电动工具
公开(公告)号：US09190947B2
公开(公告)日：2015-11-17
申请号：US13760435
申请日：2013-02-06
申请人： MAKITA CORPORATION
发明人： Kenya Yanagihara , Yoshitaka Ichikawa , Motohiro Omura , Yutaka Matsunaga
IPC分类号： H02P6/00 , H02P23/08 , H02P23/00 , B25F5/00
CPC分类号： H02P23/08 , B25F5/00 , H02P23/00
摘要： An electric power tool according to the present invention is provided with a tool main body, an induction motor, a power supply unit, and an inverter. The power supply unit and the inverter are integrally incorporated in the tool main body together with the induction motor.
摘要翻译：根据本发明的电动工具设置有工具主体，感应电动机，电源单元和逆变器。电源单元和逆变器与感应电动机一体地并入工具主体。

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