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1. 发明授权

US6042265A Sensorless estimation of rotor temperature in induction motors 失效
标题翻译：感应电动机转子温度的无传感器估计
公开(公告)号：US6042265A
公开(公告)日：2000-03-28
申请号：US1233
申请日：1997-12-30
申请人： Gerald Burt Kliman , James Henry Dymond
发明人： Gerald Burt Kliman , James Henry Dymond
IPC分类号： G01K7/42 , G01K1/12
CPC分类号： G01K7/42
摘要： Rotor temperature in induction motors is estimated without the need for any direct temperature sensors, by using only computer calculations based on data readily available in the motor control center. Thus for any given motor, it is generally possible to predetermine a relationship between rotor temperature and rotor resistance, so that by determining rotor resistance, rotor temperature can be calculated. Rotor resistance, in turn, can be calculated from measured information relating motor slip and motor torque. Any of several methods can be employed for determining torque and slip. Temperature estimation can be obtained by use of equivalent circuit methods, and additional relationships can be obtained from a simplified equivalent circuit.
摘要翻译：估计感应电机的转子温度不需要任何直接的温度传感器，只能使用基于马达控制中心现有数据的计算机计算。因此，对于任何给定的电动机，通常可以预先确定转子温度和转子电阻之间的关系，从而通过确定转子电阻，可以计算转子温度。转子电阻又可以根据与电机滑差和电机转矩相关的测量信息来计算。可以采用几种方法中的任何一种来确定扭矩和滑移。可以通过使用等效电路方法来获得温度估计，并且可以从简化的等效电路获得额外的关系。

2. 发明授权

US5886435A Reduction of windage noise in dynamoelectric machines 失效
标题翻译：降低电动机中的风阻噪声
公开(公告)号：US5886435A
公开(公告)日：1999-03-23
申请号：US944031
申请日：1997-09-24
申请人： James Henry Dymond
发明人： James Henry Dymond
IPC分类号： H02K1/20 , H02K1/32 , H02K9/00
CPC分类号： H02K1/20 , H02K1/32 , H02K2205/12
摘要： This apparatus is directed to reduction in emitted windage sound in dynamoelectric machines by detuning cavities formed in the ventilation spaces of the machine.
摘要翻译：该装置旨在通过使在机器的通风空间中形成的空腔失谐来减少电动机中的发出的风声。

3. 发明授权

US5886443A Spark suppression of induction type rotors of dynamoelectric machines 失效
标题翻译：电动机感应式转子的火花抑制
公开(公告)号：US5886443A
公开(公告)日：1999-03-23
申请号：US984620
申请日：1997-12-03
申请人： James Henry Dymond , Bernard John Moore , Robert Henry Rehder
发明人： James Henry Dymond , Bernard John Moore , Robert Henry Rehder
IPC分类号： H02K17/16 , H02K1/00
CPC分类号： H02K17/165
摘要： A rotor for an induction motor of the squirrel cage type wherein the rotor bars are exposed to a resilient anti-sparking compound in the rotor slots of the machine. The rotor bars are provided with a longitudinal slot to permit the insertion of the anti-sparking compound after assembly of the squirrel cage rotor. Alternatively, the laminations may be shaped to produce a longitudinal groove in the rotor bar slot to permit the insertion of the anti-sparking compound in the groove so produced. Of course, both the rotor bar and the rotor slot may both be provided with complimentary slots adjacent one another in which the anti-sparking compound may be injected.
摘要翻译：用于鼠笼型感应电动机的转子，其中转子杆暴露于机器的转子槽中的弹性防火化合物。转子杆设置有纵向狭槽，以允许在组装鼠笼式转子之后插入防火化合物。或者，叠片可以被成形为在转子条槽中产生纵向槽，以允许将防火花化合物插入所产生的槽中。当然，转子条和转子槽两者都可以设置有彼此相邻的互补槽，其中可以注射防火化合物。

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