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1. 发明授权

US5420492A Method and apparatus of operating a dynamoelectric machine using DC bus current profile 失效
标题翻译：使用直流母线电流曲线来操作电动机的方法和装置
公开(公告)号：US5420492A
公开(公告)日：1995-05-30
申请号：US4411
申请日：1993-01-14
申请人： Pradeep K. Sood , james L. Skinner , Douglas M. Petty
发明人： Pradeep K. Sood , james L. Skinner , Douglas M. Petty
IPC分类号： H02P6/08 , H02P6/18 , H02P5/40 , H02P1/26
CPC分类号： H02P6/18 , H02P6/08 , Y02P80/116
摘要： A dynamoelectric machine, for example, a brushless permanent magnet motor (M) has a plurality of stator windings (S) and a rotor (T) which rotates with respect to the windings. Apparatus (10) is provided for controlling winding commutation with respect to the rotor. A DC bus (14) supplies current to the windings. The current waveshape has characteristics which are a function of the commutation angle with respect to the windings. Current magnitude and waveshape are sensed by a sensing unit (22) and the sensed waveshape is sampled to obtain commutation information. An inverter (20) successively energizes and de-energizes the respective stator windings. A controller (26) obtains samples of the waveshape, and processes the information obtained by the sampling to control winding commutation. The controller controls the inverter operation to provide a commutation angle which optimizes motor performance and efficiency for a particular set of motor operating conditions. To do this, the processor evaluates slope and amplitude information from the sampled DC bus current waveshape, determines if the waveshape corresponds to a desired waveshape representing a desired commutation angle, and adjusts the commutation frequency produced by the inverter, if necessary, to obtain the desired waveshape.
摘要翻译：电动机，例如，无刷永磁电动机（M）具有相对于绕组旋转的多个定子绕组（S）和转子（T）。提供装置（10）用于控制相对于转子的绕组换向。 DC总线（14）向绕组提供电流。当前波形具有相对于绕组的换向角的函数的特性。电流幅度和波形由感测单元（22）感测，并且感测的波形被采样以获得换向信息。逆变器（20）相应地对相应的定子绕组通电和断电。控制器（26）获得波形的采样，并处理通过采样得到的信息以控制绕组换向。控制器控制变频器运行，以提供换向角，从而优化电机运行条件下的特定电机性能和效率。为此，处理器从采样的直流总线当前波形图中评估斜率和振幅信息，确定波形是否对应于表示期望换向角的期望波形，并且如果需要则调整由逆变器产生的换向频率，以获得想要的波形

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