专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US4873792A Polishing apparatus 失效
标题翻译：抛光设备
公开(公告)号：US4873792A
公开(公告)日：1989-10-17
申请号：US200842
申请日：1988-06-01
申请人： Thomas A. Linke , Issa R. Dandan , Troy W. Livingston , Alan W. Wilkerson
发明人： Thomas A. Linke , Issa R. Dandan , Troy W. Livingston , Alan W. Wilkerson
IPC分类号： B24B7/04 , B24B37/005 , B24B49/04
CPC分类号： B24B37/005 , B24B49/04
摘要： Apparatus for polishing or grinding specimens in which the pressure between the sample and the platen against which it presses for grinding or polishing is controlled by a feedback system, which includes a strain gauge from which the sample-holding grinding shaft is suspended.
摘要翻译：用于抛光或研磨样品的装置，其中样品和压板之间的压力被挤压用于研磨或抛光的试样由反馈系统控制，反馈系统包括一个应变计，样品保持研磨轴从该应变仪悬挂起来。

2. 发明授权

US4942795A Precision cutter with automated pressure control 失效
标题翻译：精密切割机具有自动压力控制
公开(公告)号：US4942795A
公开(公告)日：1990-07-24
申请号：US201531
申请日：1988-06-02
申请人： Thomas A. Linke , Alan W. Wilkerson , Ashok K. Parida
发明人： Thomas A. Linke , Alan W. Wilkerson , Ashok K. Parida
IPC分类号： B23D45/00 , B23D45/04 , B23D47/08 , B23D47/12 , B23D59/00 , B23D59/02 , B24B49/16 , B28D5/02
CPC分类号： B28D5/025 , B23D47/12 , B23D59/001 , B23D59/02 , B24B49/16 , Y10T83/141 , Y10T83/6475 , Y10T83/6555 , Y10T83/6563 , Y10T83/6667
摘要： A saw apparatus comprises an operatable saw blade and a holding arm for gripping an object to be sawed, plus means for moving the saw blade and holding arm together to cause the saw blade to engage the object for sawing under controlled-pressure conditions. The saw blade is carried by strain gauge means, the strain gauge means being part of electronic means for sensing the load of the operatable saw blade on the strain gauge means. Thus, pressure of the object for sawing against the top of the saw blade causes an increase in the load sensed by the strain gauge. The electronic signal generated thereby may be used in a feedback system to control the pressure of the workpiece against the saw blade.
摘要翻译：锯装置包括可操作的锯片和用于夹持被锯切物体的保持臂，以及用于将锯片和保持臂一起移动在一起的装置，以使锯片接合物体以在受控压力条件下进行锯切。锯片由应变计装置承载，应变计装置是用于感测应变计装置上可操作的锯片的负载的电子装置的一部分。因此，用于锯切锯片的顶部的物体的压力导致应变计感测到的负载增加。由此生成的电子信号可以用在反馈系统中以控制工件抵抗锯片的压力。

3. 外观设计

USD430856S Circuit board 失效
公开(公告)号：USD430856S
公开(公告)日：2000-09-12
申请号：US108871
申请日：1999-08-05
申请人： Alan W. Wilkerson
设计人： Alan W. Wilkerson

4. 发明授权

US5629598A Speed control for induction motor having improved sensing of motor operative conditions 失效
标题翻译：感应电动机的速度控制具有改善的电动机操作条件的感测
公开(公告)号：US5629598A
公开(公告)日：1997-05-13
申请号：US489944
申请日：1995-06-13
申请人： Alan W. Wilkerson
发明人： Alan W. Wilkerson
IPC分类号： H02P1/42 , H02P5/41
CPC分类号： H02P1/42
摘要： An apparatus and method controls the speed of an AC induction motor by varying the frequency and current to the motor from an inverter power supply. A Counter EMF regulator receives a reference signal corresponding to the desired speed, and a signal proportional to CEMF for feedback. The output of the CEMF regulator is provided to the power supply to control the current to the motor. The CEMF feedback signal is also utilized to vary the output frequency of the power supply in accordance with the magnitude of the CEMF. This maintains the magnetizing component of stator winding current at a constant value for all operating frequencies of the motor. A signal corresponding to the load current component of the stator winding adds to the speed reference signal to the CEMF regulator to increase CEMF and frequency with increasing load, thereby to compensate for increased slip and maintain constant speed. The voltage on a DC bus in the inverter power supply is compared to a reference signal, the magnitude of which corresponds to the voltage on the bus when the motor is operating at synchronous speed. If the bus voltage is less than the reference voltage, the motor is in the motoring condition and the frequency of the power supply is determined by the CEMF. If the bus voltage is greater than the reference voltage, the motor is regenerating, and the frequency of the power supply is increased to prevent regeneration, and to avoid the need for the power supply to absorb regenerative energy.
摘要翻译：装置和方法通过从逆变器电源改变电动机的频率和电流来控制AC感应电动机的速度。反电动势调节器接收对应于期望速度的参考信号，并且与CEMF成比例的信号用于反馈。将CEMF调节器的输出提供给电源以控制电机的电流。 CEMF反馈信号也用于根据CEMF的大小来改变电源的输出频率。这将电机的所有工作频率的定子绕组电流的磁化部件保持在恒定值。与定子绕组的负载电流分量相对应的信号将增加到CEMF调节器的速度参考信号，以增加负载的CEMF和频率，从而补偿增加的滑差并保持恒定的速度。将变频器电源中的直流总线上的电压与参考信号进行比较，参考信号的大小对应于电机以同步速度运行时总线上的电压。如果总线电压小于参考电压，则电机处于运转状态，电源频率由CEMF决定。如果总线电压大于参考电压，则电机正在再生，并且增加电源的频率以防止再生，并避免电源吸收再生能量。

5. 发明授权

US4020287A Telephonic troubleshooting circuit for electric motor drives 失效
标题翻译：电动机驱动电话故障排除电路
公开(公告)号：US4020287A
公开(公告)日：1977-04-26
申请号：US554506
申请日：1975-03-03
申请人： Alan W. Wilkerson
发明人： Alan W. Wilkerson
IPC分类号： H04M11/00
CPC分类号： H04M11/002
摘要： Electrical phenomena from electric motor drive circuitry is transmitted through telephone couplers, telephones, and telephone lines to provide signal data to a service technician remote from the circuitry for ascertaining the operative condition of the motor drive circuitry.
摘要翻译：来自电动机驱动电路的电气现象通过电话耦合器，电话和电话线传输，以向远离电路的维修技术人员提供信号数据，以确定电机驱动电路的工作状态。

6. 发明授权

US3946242A Geophysical energy source utilization circuit 失效
标题翻译：地球物理能源利用电路
公开(公告)号：US3946242A
公开(公告)日：1976-03-23
申请号：US554972
申请日：1975-03-03
申请人： Alan W. Wilkerson
发明人： Alan W. Wilkerson
IPC分类号： F03G7/00 , F03D9/00 , H02J3/00 , H02J3/36 , H02M7/515 , H02M7/525 , H02J3/40
CPC分类号： H02J3/36 , F03D9/003 , H02M7/515 , H02M7/525 , F05B2220/706 , F05B2220/7062 , Y02E10/725 , Y02E10/76 , Y02E60/60 , Y10T307/511 , Y10T307/675
摘要： A conversion means converts the energy available from a source, such as the wind or sun, into a corresponding amount of d.c. electrical power. A switching circuit, typically a thyristor bridge, is connected between the conversion means and an a.c. load and across a.c. power mains energizing the load. The switching circuit is operable to periodically connect the conversion means to the a.c. load in a power supplying manner. The a.c. mains impart suitable voltage and frequency characteristics to the electrical power so supplied. In the event the supplied power exceeds the power required by the a.c. load, the difference is taken by the a.c. power mains.
摘要翻译：转换装置将来自源（例如风或太阳）的能量转换成相应量的直流。电力。开关电路，通常是晶闸管桥，连接在转换装置和交流电路之间。负载和交叉电源为负载供电。切换电路可操作以将转换装置周期性地连接到交流电。以供电方式加载。 a.c. 电源为所供应的电力赋予适当的电压和频率特性。如果供电功率超过交流所需的功率。负载，差异由a.c. 电源。

7. 发明授权

US5440219A Induction motor speed control having improved sensing of motor operative conditions 失效
标题翻译：感应电动机速度控制具有改善的电动机操作条件的感测
公开(公告)号：US5440219A
公开(公告)日：1995-08-08
申请号：US65604
申请日：1993-05-21
申请人： Alan W. Wilkerson
发明人： Alan W. Wilkerson
IPC分类号： H02P1/42
CPC分类号： H02P1/42
摘要： An apparatus and method controls the speed of an AC induction motor by varying the frequency and current to the motor from an inverter power supply. A Counter EMF regulator receives a reference signal corresponding to the desired speed, and a signal proportional to CEMF for feedback. The output of the CEMF regulator is provided to the power supply to control the current to the motor. The CEMF feedback signal is also utilized to vary the output frequency of the power supply in accordance with the magnitude of the CEMF. This maintains the magnetizing component of stator winding current at a constant value for all operating frequencies of the motor. A signal corresponding to the load current component of the stator winding adds to the speed reference signal to the CEMF regulator to increase CEMF and frequency with increasing load, thereby to compensate for increased slip and maintain constant speed. The phase displacement between CEMF and stator winding current is determined. If the phase displacement is less than 90.degree., the motor is in the motoring condition and the frequency of the power supply is determined solely by the CEMF. If the phase displacement is greater than 90.degree., the motor is regenerating, and the frequency of the power supply is increased to prevent regeneration, and to avoid the need for the power supply to absorb regenerative energy.
摘要翻译：装置和方法通过从逆变器电源改变电动机的频率和电流来控制AC感应电动机的速度。反电动势调节器接收对应于期望速度的参考信号，并且与CEMF成比例的信号用于反馈。将CEMF调节器的输出提供给电源以控制电机的电流。 CEMF反馈信号也用于根据CEMF的大小来改变电源的输出频率。这将电机的所有工作频率的定子绕组电流的磁化部件保持在恒定值。与定子绕组的负载电流分量相对应的信号将增加到CEMF调节器的速度参考信号，以增加负载的CEMF和频率，从而补偿增加的滑差并保持恒定的速度。确定CEMF与定子绕组电流之间的相位位移。如果相位位移小于90°，电机处于运转状态，电源频率由CEMF决定。如果相位位移大于90°，则电机正在再生，电源频率提高，防止再生，避免电源吸收再生能。

8. 发明授权

US4074194A Watt meter providing electrical signal proportional to power 失效
标题翻译：电力仪表提供电力信号
公开(公告)号：US4074194A
公开(公告)日：1978-02-14
申请号：US773070
申请日：1977-02-28
申请人： Alan W. Wilkerson
发明人： Alan W. Wilkerson
IPC分类号： G01R21/00 , G01R7/00
CPC分类号： G01R21/00
摘要： A watt meter circuit capable of providing an electrical signal indicative of power includes a signal forming means for providing a pair of signals proportional to current. The signals are equal to each other in magnitude but opposite in polarity and are provided in parallel through a switch to filter which provides the electrical power signal. The switch is operated by a signal generating means which generates a triangular wave form. The voltage to the watt meter is compared with the triangular wave form to vary the duty cycle of the switch and the magnitude and polarity of the output signal in accordance with the algebraic product of voltage and current.

9. 发明授权

US4027220A Regenerative motor control having improved field circuit 失效
标题翻译：再生电机控制具有改进的励磁电路
公开(公告)号：US4027220A
公开(公告)日：1977-05-31
申请号：US574550
申请日：1975-05-05
申请人： Alan W. Wilkerson
发明人： Alan W. Wilkerson
IPC分类号： H02P3/14 , H02P7/28
CPC分类号： H02P3/14 , H02P7/2815
摘要： The field circuit of a regenerative direct current motor control provides rapid reversal of motor field current by discharging the inductive energy of the winding back to an alternating current power supply. This is accomplished by firing the thyristors means in the field circuit late in the half cycles of alternating current by means of an improved firing circuit.
摘要翻译：再生直流电动机控制的励磁电路通过将绕组的感应能量放回到交流电源来提供马达励磁电流的快速反转。这是通过借助于改进的点火电路在交流电的半周期内在场电路中触发晶闸管装置来实现的。

10. 发明授权

US5351336A Motor control having improved speed regulation under intermittent loading 失效
标题翻译：电机控制在间歇加载下具有改进的速度调节
公开(公告)号：US5351336A
公开(公告)日：1994-09-27
申请号：US916037
申请日：1992-07-17
申请人： Alan W. Wilkerson
发明人： Alan W. Wilkerson
IPC分类号： H02P7/29 , H02P5/17
CPC分类号： H02P7/2913 , Y10S388/902 , Y10S388/91
摘要： A control for energizing a DC motor to provide improved speed regulation to the motor under transient conditions. The control includes a regulating circuit having an output signal controlling the armature voltage applied to the motor. An input speed reference signal corresponding to the desired speed of said motor is provided to the regulating circuit. An input armature voltage feedback signal is also provided to the regulating circuit to produce an error signal for operating said regulating circuit to establish the armature voltage, and hence the speed of said motor. The armature current of the motor is sensed and a signal corresponding to the voltage drop resulting from the inductance of the armature circuit provided to the regulating circuit for altering the output of the regulating circuit in a manner tending to establish the speed of said motor at that established by said speed reference signal. An IR compensating circuit provides an IR compensating signal to the regulating circuit.
摘要翻译：用于激励直流电动机的控制，以在瞬态条件下为电动机提供改进的速度调节。该控制器包括调节电路，该调节电路具有控制施加到电机的电枢电压的输出信号。将与所述电动机的期望速度相对应的输入速度参考信号提供给调节电路。输入电枢电压反馈信号也被提供给调节电路以产生用于操作所述调节电路的误差信号，以建立电枢电压，并因此建立所述电动机的速度。感测到电动机的电枢电流，并且产生一个信号，该信号对应于提供给调节电路的电枢电路的电感所产生的电压降，以便以这种方式改变调节电路的输出，以便确定所述电动机的速度由所述速度参考信号建立。 IR补偿电路向调节电路提供IR补偿信号。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式