公开(公告)号：US20180159392A1

公开(公告)日：2018-06-07

申请号：US15367351

申请日：2016-12-02

Applicant: Rockwell Automation Technologies, Inc.

Inventor： Xikai Sun ,  Kun Wei ,  Gennadi Sizov ,  Jingbo Liu

IPC: H02K1/27 ,  H02K1/08

CPC classification number: H02K1/276 ,  H02K1/08 ,  H02K1/2766 ,  H02K21/16

Abstract: An electric motor in which at least one of the rotor and the stator has, an asymmetric design is disclosed. The electric motor is divided into a number of segments, where each segment has an equal number of windings and an equal number of poles. The physical construction of each pole within a segment is identical and the number of turns of each winding within a segment is identical. The asymmetry is formed by varying the physical construction of the either the rotor or the stator within one segment from the corresponding construction of the rotor or stator in the other segments. The asymmetries are designed to improve one or more operating characteristics such as sensorless performance, torque ripple, or cogging torque in the motor.

公开(公告)号：US20150333663A1

公开(公告)日：2015-11-19

申请号：US14321330

申请日：2014-07-01

Applicant: Rockwell Automation Technologies, Inc.

Inventor： Kun Wei ,  HaiHui Lu ,  Andrew Jaap ,  David Messersmith ,  Randall Langer ,  Ping Lee

IPC: H02P1/04 ,  H02P1/16

CPC classification number: H02P27/047 ,  H02P1/04 ,  H02P1/16 ,  H02P1/26 ,  H02P1/40 ,  H02P21/28 ,  H02P21/34 ,  H02P27/16

Abstract: An apparatus for a quasi variable frequency motor controller is includes a DFC module that applies a first frequency to a motor as part of a discrete frequency control (“DFC”) method for motor starting. The first frequency includes a discrete frequency in a plurality of discrete frequencies of the DFC method and each discrete frequency includes a frequency lower than a fundamental frequency of an alternating current (“AC”) voltage source providing power to the motor. The apparatus includes a torque module that determines when motor torque generated by the motor reaches a negative torque threshold and a next frequency module that applies a second frequency to the motor in response to the torque module determining that the motor torque has reached the negative torque threshold. The second frequency is a next frequency in the DFC method.

Abstract translation: 准变频电机控制器的装置包括：DFC模块，其将作为电动机起动的离散频率控制（“DFC”）方法的一部分施加于电动机的第一频率。 第一频率包括在DFC方法的多个离散频率中的离散频率，并且每个离散频率包括低于向电动机提供电力的交流（“AC”）电压源的基频的频率。 该装置包括扭矩模块，其确定电动机产生的电动机扭矩何时达到负转矩阈值;以及下一个频率模块，其响应于转矩模块确定电动机转矩达到负转矩阈值，向电动机施加第二频率 。 第二个频率是DFC方法中的下一个频率。