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公开(公告)号：US08988028B2
公开(公告)日：2015-03-24
申请号：US13211491
申请日：2011-08-17
CPC分类号： H02P6/12 , F04B35/04 , F04B49/06 , F04B2203/0202 , H02P3/18 , H02P3/22 , H02P6/182 , H02P6/24 , H02P29/0241
摘要： A system includes a motor, an inverter bridge, a voltage detection circuit, and a controller. The motor has a stator and a rotor. The inverter bridge is configured to provide a voltage to the stator, and includes a first switch connected in a series-type relationship with a second switch, a first diode coupled across the first switch, and a second diode coupled across the second switch. The voltage detection circuit is configured to detect a back EMF voltage in the winding. The controller is configured to control the first switch and the second switch to drive the motor, and to receive an indication of the back EMF voltage in the winding from the voltage detection circuit. The controller is also configured to determine a fault has occurred, and to drive one of the first switch and the second switch when a fault has occurred.
摘要翻译： 系统包括电动机，逆变器桥，电压检测电路和控制器。 电机具有定子和转子。 逆变器桥被配置为向定子提供电压，并且包括与第二开关以串联型关系连接的第一开关，跨越第一开关耦合的第一二极管和跨越第二开关耦合的第二二极管。 电压检测电路被配置为检测绕组中的反电动势电压。 控制器被配置为控制第一开关和第二开关以驱动电动机，并且从电压检测电路接收绕组中的反电动势电压的指示。 控制器还被配置为确定发生了故障，并且在发生故障时驱动第一交换机和第二交换机之一。
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公开(公告)号：US20130045113A1
公开(公告)日：2013-02-21
申请号：US13211491
申请日：2011-08-17
IPC分类号： F04B49/06
CPC分类号： H02P6/12 , F04B35/04 , F04B49/06 , F04B2203/0202 , H02P3/18 , H02P3/22 , H02P6/182 , H02P6/24 , H02P29/0241
摘要： A system for operating a compressor. The system includes a motor, an inverter bridge, a voltage detection circuit, and a controller. The motor has a stator and a rotor. The inverter bridge is configured to provide a voltage to the stator, and includes a first switch connected in a series-type relationship with a second switch, a first diode coupled across the first switch, and a second diode coupled across the second switch. The voltage detection circuit is configured to detect a back EMF voltage in the winding. The controller is coupled to the inverter bridge and the voltage detection circuit. The controller is configured to control the first switch and the second switch to drive the motor, and to receive an indication of the back EMF voltage in the winding from the voltage detection circuit. The controller is also configured to determine a fault has occurred, and to drive one of the first switch and the second switch when a fault has occurred.
摘要翻译： 一种用于操作压缩机的系统。 该系统包括电动机，逆变桥，电压检测电路和控制器。 电机具有定子和转子。 逆变器桥被配置为向定子提供电压，并且包括与第二开关以串联型关系连接的第一开关，跨越第一开关耦合的第一二极管和跨越第二开关耦合的第二二极管。 电压检测电路被配置为检测绕组中的反电动势电压。 控制器耦合到逆变桥和电压检测电路。 控制器被配置为控制第一开关和第二开关以驱动电动机，并且从电压检测电路接收绕组中的反电动势电压的指示。 控制器还被配置为确定发生了故障，并且在发生故障时驱动第一交换机和第二交换机之一。
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公开(公告)号：US09176193B2
公开(公告)日：2015-11-03
申请号：US13454047
申请日：2012-04-23
申请人： David M. Foye , Nathan T. West
发明人： David M. Foye , Nathan T. West
IPC分类号： G01R31/34
CPC分类号： G01R31/343
摘要： A test setup for a permanent magnet motor provides a method for identifying symmetry or asymmetry in the magnetic fields of the motor's permanent magnets. The setup comprises a test circuit that includes a fixed reference node that provides a stable reference to which the motor's common node can be compared. Observing the waveform of the voltage between the two nodes while the motor is running helps identify an imbalance in the magnetic fields of the motor's permanent magnets.
摘要翻译： 用于永磁电动机的测试装置提供了一种用于识别电动机永磁体的磁场中的对称性或不对称性的方法。 该设置包括测试电路，该测试电路包括固定参考节点，其提供可以比较电动机的公共节点的稳定基准。 在电机运行时观察两个节点之间的电压波形有助于识别电机永磁体磁场的不平衡。
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公开(公告)号：US08179157B2
公开(公告)日：2012-05-15
申请号：US12321451
申请日：2009-01-21
申请人： David M. Foye , Nathan T. West
发明人： David M. Foye , Nathan T. West
IPC分类号： G01R31/34
CPC分类号： G01R31/343
摘要： A test setup for a permanent magnet motor provides a method for identifying symmetry or asymmetry in the magnetic fields of the motor's permanent magnets. The setup comprises a test circuit that includes a fixed reference node that provides a stable reference to which the motor's common node can be compared. Observing the waveform of the voltage between the two nodes while the motor is running helps identify an imbalance in the magnetic fields of the motor's permanent magnets.
摘要翻译： 用于永磁电动机的测试装置提供了一种用于识别电动机永磁体的磁场中的对称性或不对称性的方法。 该设置包括测试电路，该测试电路包括固定参考节点，其提供可以比较电动机的公共节点的稳定基准。 在电机运行时观察两个节点之间的电压波形有助于识别电机永磁体磁场的不平衡。
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公开(公告)号：US5385297A
公开(公告)日：1995-01-31
申请号：US64387
申请日：1993-05-21
申请人： Alan D. Rein , David M. Foye
发明人： Alan D. Rein , David M. Foye
CPC分类号： H02J13/0079 , F24F11/00 , G05D23/1905 , G05D23/1934 , G08C17/00 , F24F11/0009 , F24F11/04 , F24F2011/0067 , F24F2011/0068 , F24F2221/54 , F24F3/00 , G08C2201/40 , G08C2201/41 , Y02B70/3216 , Y02B70/3241 , Y02B70/3275 , Y02B90/2684 , Y02E60/74 , Y02E60/7884 , Y04S10/30 , Y04S20/221 , Y04S20/227 , Y04S20/244 , Y04S40/143
摘要： A hierarchical control system including a central receiver; a first communications medium operably connecting the central receiver to at least one controller; and a controller operably connected to the central receiver by the first communications medium. The system also includes a sensor for sensing conditions; a second communication medium; and a transmitter for transmitting the sensed conditions from the sensor to the central receiver via the second communications medium. The central receiver also includes receiver for receiving transmissions on the second communications medium and a transmitter for retransmitting the transmissions on the first communications medium.
摘要翻译： 包括中央接收机的分级控制系统; 第一通信介质，可操作地将所述中央接收机连接到至少一个控制器; 以及通过第一通信介质可操作地连接到中央接收器的控制器。 该系统还包括用于感测条件的传感器; 第二通信介质; 以及发射机，用于经由第二通信介质将感测到的条件从传感器发送到中央接收机。 中央接收机还包括用于在第二通信介质上接收传输的接收机和用于在第一通信介质上重传传输的发射机。
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公开(公告)号：US5058031A
公开(公告)日：1991-10-15
申请号：US502355
申请日：1990-03-30
IPC分类号： H02H7/09
CPC分类号： H02H7/09
摘要： A method of protecting the compressor motor of a refrigeration system using a multiphase AC power source. The method comprises the steps of monitoring each phase of the power supply to the compressor motor; calculating the average phase for the phases of the AC power supply; determining a maximum phase unbalance deviation from the average phase; determining if a first level of phase unbalance protection is active; setting a system protection level as the first level of phase unbalance protection if the first level is active; setting the system protection level as a second higher level of phase unbalance protection if the first level is not active; and initiating a compressor motor shutdown if the system protection level is exceeded by the maximum unbalanced phase deviation.
摘要翻译： 使用多相交流电源保护制冷系统的压缩机电动机的方法。 该方法包括以下步骤：监测对压缩机电动机的电源的每个相位; 计算交流电源的相位的平均相位; 确定与平均相位的最大相位不平衡偏差; 确定相位不平衡保护的第一级是否有效; 如果第一级激活，则将系统保护级别设置为第一级相位不平衡保护; 如果第一级不活动，则将系统保护级别设置为第二级相位不平衡保护级别; 如果系统保护等级超过最大不平衡相位偏差，则启动压缩机电机停机。
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公开(公告)号：US20110041533A1
公开(公告)日：2011-02-24
申请号：US12544582
申请日：2009-08-20
CPC分类号： F25B49/022 , F04B35/04 , F04C18/00 , F04C18/16 , F04C28/08 , F04C2240/403 , F04C2240/81 , F04C2270/03 , F25B1/047 , F25B49/025 , F25B2600/02 , F25B2600/0253 , Y02B30/741
摘要： An embodiment of method used to control operation of a screw compressor of a refrigeration system may include receiving status signals regarding operation of the screw compressor of the refrigeration system. The method may further include determining an operating point of the screw compressor based upon the received status signals, and selecting a torque profile for the screw compressor based upon the operating point. The method may also include driving the screw compressor per the selected torque profile. Refrigeration systems and compressor systems suitable for implementing the method are also presented.
摘要翻译： 用于控制制冷系统的螺杆式压缩机的操作的方法的实施例可以包括接收关于制冷系统的螺杆式压缩机的操作的状态信号。 该方法还可以包括基于接收到的状态信号来确定螺杆式压缩机的工作点，以及基于操作点选择用于螺杆式压缩机的扭矩分布。 该方法还可以包括根据所选择的扭矩分布来驱动螺杆式压缩机。 还介绍了适用于实施该方法的制冷系统和压缩机系统。
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公开(公告)号：US20080166246A1
公开(公告)日：2008-07-10
申请号：US11650279
申请日：2007-01-05
申请人： Robert M. Swanson , Joel S. Duga , David M. Foye
发明人： Robert M. Swanson , Joel S. Duga , David M. Foye
CPC分类号： F25B1/04 , F04D25/0606 , F04D27/0292 , F04D29/059 , H02K11/20 , Y10T29/49238
摘要： To protect the bearings, lubricant and seals of a refrigerant compressor, the compressor includes one or more inductors for mitigating a high frequency common mode current that produces a high frequency shaft voltage. Each inductor is a ring of magnetic material encircling three insulated cables that convey three-phase power from an adjustable frequency drive to the compressor's motor. Without the inductors, the high frequency shaft voltage can become damagingly high due to the length of a cast iron housing that can be particularly long if the housing contains both a motor and several centrifugal impellers. The high frequency shaft voltage is just one component of a composite adverse shaft voltage. Another component, known as an operationally induced shaft voltage, can be reduced by a grounding contact, so instead of using just an inductor or just a contact, both can be used to provide a total solution to the problem.
摘要翻译： 为了保护制冷剂压缩机的轴承，润滑剂和密封件，压缩机包括用于减轻产生高频轴电压的高频共模电流的一个或多个电感器。 每个电感都是环绕三根绝缘电缆的磁性材料环，将三相电源从变频器传输到压缩机的电机。 没有电感器，由于铸铁壳体的长度，高频轴电压可能会变得很高，如果外壳包含电动机和多个离心式叶轮，则可能特别长。 高频轴电压只是复合不利轴电压的一个组成部分。 被称为可操作感应的轴电压的另一个组件可以通过接地触点来减少，因此，不仅仅使用电感器或仅仅使用接触器，所以可以使用这两个部件来提供问题的总体解决方案。
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公开(公告)号：US5161387A
公开(公告)日：1992-11-10
申请号：US691940
申请日：1991-04-26
申请人： Alan G. Metcalfe , Tedd P. Johnson , David M. Foye
发明人： Alan G. Metcalfe , Tedd P. Johnson , David M. Foye
CPC分类号： G05D23/1905 , F24F11/02
摘要： A method of determining and controlling a load by a controller. The method comprises the steps of transmitting a signal for a first predetermined time period on an electrical line having a load in parallel with a capacitor; monitoring the electrical line for electrical activity within a second predetermined time period following the first time period; and controlling the load in response to the presence or absence of the electrical activity.
摘要翻译： 一种由控制器确定和控制负载的方法。 该方法包括以下步骤：在具有与电容器并联的负载的电线上传送第一预定时间段的信号; 在第一时间段之后的第二预定时间段内监测电线路的电活动; 并响应于是否存在电活动来控制负载。
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公开(公告)号：US4487028A
公开(公告)日：1984-12-11
申请号：US534849
申请日：1983-09-22
申请人： David M. Foye
发明人： David M. Foye
CPC分类号： G05D23/1917 , F25B49/022 , F25D17/02 , F25B2400/075
摘要： A control for a variable capacity reciprocating compressor water chiller system. A microprocessor connected to monitor return and supply fluid temperature sensors in the system is programmed to vary the compressor capacity in response to the deviation of the return and supply chilled water temperatures from desired values. The control determines these desired values as a function of predetermined full load return, supply, and reference temperature setpoints, and as a function of the relative loading of the chiller system. The control also functions to selectively offset the chilled water temperatures in one of three control modes. If zone temperature sensors are connected to the control, the offset is a function of the deviation of the weighted average zone temperature from a setpoint. The second control mode allows offset as a function of the outdoor ambient air temperature, and the third, as a function of a temporary setpoint.
摘要翻译： 可变容量往复式压缩机水冷却器系统的控制。 连接到监视系统中返回和供应液体温度传感器的微处理器被编程为响应于返回和供应冷却水温度与期望值的偏差来改变压缩机容量。 控制器将这些期望值确定为预定的全负载返回，供应和参考温度设定值的函数，并且作为冷却器系统的相对负载的函数。 控制还用于以三种控制模式之一选择性地抵消冷冻水温度。 如果区域温度传感器连接到控制器，则偏移量是加权平均区域温度与设定值偏差的函数。 第二控制模式允许作为室外环境空气温度的函数的偏移，并且第三控制模式作为临时设定点的函数。
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