公开(公告)号：US20080315896A1

公开(公告)日：2008-12-25

申请号：US12140232

申请日：2008-06-16

Applicant: BABAK FAHIMI ,  UMAMAHESHWAR KRISHNAMURTHY

Inventor： BABAK FAHIMI ,  UMAMAHESHWAR KRISHNAMURTHY

IPC: G01R27/02 ,  H02P6/16

CPC classification number: G01R31/34 ,  G01R27/2611 ,  H02P25/089

Abstract: A system and technique for measuring the mutual inductance in a switched reluctance machine (SRM). In a first example embodiment of the technique, a voltage pulse is applied to primary coil when the machine is stationery. By measuring current in the primary coil and measuring induced voltages in adjacent open circuited coils mutual inductance may be determined. In another example embodiment, a voltage pulse is applied to the primary coil when the machine is stationery. The secondary coil is allowed to freewheel current through the phase. By measuring time taken by the primary phase to reach a preset value, the mutual inductance for the known position of a rotor can be determined.

Abstract translation: 用于测量开关磁阻电机（SRM）中互感的系统和技术。 在该技术的第一示例性实施例中，当机器是文具时，将电压脉冲施加到初级线圈。 通过测量初级线圈中的电流并测量相邻开路线圈中的感应电压，可以确定互感。 在另一个示例实施例中，当机器是文具时，电压脉冲被施加到初级线圈。 允许次级线圈使电流通过相位。 通过测量主相达到预设值所花费的时间，可以确定转子已知位置的互感。

公开(公告)号：US20130033215A1

公开(公告)日：2013-02-07

申请号：US13195461

申请日：2011-08-01

Applicant: Umamaheshwar Krishnamurthy ,  Yao Da

Inventor： Umamaheshwar Krishnamurthy ,  Yao Da

IPC: H02P23/14

CPC classification number: H02P21/14 ,  H02P29/0241

Abstract: An apparatus and method for determining a condition of an electric machine. Search coils are wound around stator teeth and the induced voltage is used to decouple stator and rotor fluxes. The decoupled fluxes allow for machine condition monitoring and fault diagnosis.

Abstract translation: 一种用于确定电机状况的装置和方法。 搜索线圈缠绕在定子齿上，感应电压用于去耦定子和转子磁通。 去耦通量允许机器状态监测和故障诊断。

公开(公告)号：US20110248582A1

公开(公告)日：2011-10-13

申请号：US12758967

申请日：2010-04-13

Applicant: Piyush C. Desai ,  Ali Emadi ,  Umamaheshwar Krishnamurthy

Inventor： Piyush C. Desai ,  Ali Emadi ,  Umamaheshwar Krishnamurthy

IPC: H02K37/08

CPC classification number: H02K19/103 ,  H02K19/24 ,  H02K2201/12

Abstract: A switched reluctance machine (SRM) having a rotor and stator pole numerical relationship of S number of stator poles and R number of rotor poles, where R=2S−2, when S is greater than 4; provides improved power density, torque production, torque ripple, and is readily adaptable to existing hardware such as known controllers and the like.

Abstract translation: 具有S个定子极的转子和定子极数值关系的开关磁阻电机（SRM）和当S大于4时R = 2S-2的转子极数R; 提供了改进的功率密度，扭矩产生，扭矩波动，并且容易地适应于诸如已知的控制器等的现有硬件。

公开(公告)号：US08125170B2

公开(公告)日：2012-02-28

申请号：US12140232

申请日：2008-06-16

Applicant: Babak Fahimi ,  Umamaheshwar Krishnamurthy

Inventor： Babak Fahimi ,  Umamaheshwar Krishnamurthy

IPC: H02P6/00

CPC classification number: G01R31/34 ,  G01R27/2611 ,  H02P25/089

Abstract: A system and technique for measuring the mutual inductance in a switched reluctance machine (SRM). In a first example embodiment of the technique, a voltage pulse is applied to primary coil when the machine is stationery. By measuring current in the primary coil and measuring induced voltages in adjacent open circuited coils mutual inductance may be determined. In another example embodiment, a voltage pulse is applied to the primary coil when the machine is stationery. The secondary coil is allowed to freewheel current through the phase. By measuring time taken by the primary phase to reach a preset value, the mutual inductance for the known position of a rotor can be determined.

Abstract translation: 用于测量开关磁阻电机（SRM）中互感的系统和技术。 在该技术的第一示例性实施例中，当机器是文具时，将电压脉冲施加到初级线圈。 通过测量初级线圈中的电流并测量相邻开路线圈中的感应电压，可以确定互感。 在另一个示例实施例中，当机器是文具时，电压脉冲被施加到初级线圈。 允许次级线圈使电流通过相位。 通过测量主相达到预设值所花费的时间，可以确定转子已知位置的互感。