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公开(公告)号：US20200328655A1
公开(公告)日：2020-10-15
申请号：US16382914
申请日：2019-04-12
申请人： Caterpillar Inc.
摘要： A rotary electric machine includes a stator, a rotor, a plurality of coils and a plurality of spacers. The stator has a stator body and a plurality of stator poles. Each stator pole has a pair of oppositely facing side surfaces. The rotor is positioned within the stator and has a plurality of rotor poles. One coil is disposed about each stator pole. The spacers are disposed between one coil and at least one of an inner circumferential surface of the stator body and the side surfaces of the stator body to define a fluid flow opening between the coil and the stator.
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公开(公告)号：US10965192B2
公开(公告)日：2021-03-30
申请号：US16382914
申请日：2019-04-12
申请人： Caterpillar Inc.
摘要： A rotary electric machine includes a stator, a rotor, a plurality of coils and a plurality of spacers. The stator has a stator body and a plurality of stator poles. Each stator pole has a pair of oppositely facing side surfaces. The rotor is positioned within the stator and has a plurality of rotor poles. One coil is disposed about each stator pole. The spacers are disposed between one coil and at least one of an inner circumferential surface of the stator body and the side surfaces of the stator body to define a fluid flow opening between the coil and the stator.
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公开(公告)号：US11811344B2
公开(公告)日：2023-11-07
申请号：US17132076
申请日：2020-12-23
申请人： Caterpillar Inc.
发明人： Jesse R. Gerdes , Thomas M. Sopko , Carlos E. Nino Baron , Jackson Wai , Ahmed Khalil , Sajan Abdul , Amara Ashfaq , James Michael Thorne
CPC分类号： H02P23/30 , E02F9/207 , E02F3/7609 , E02F3/841 , E02F9/02
摘要： A work machine includes a frame, a traction system supporting the frame, a power source mounted on the frame, a switched reluctance motor, an inverter configured to control power to the motor from a power source, and a controller. The controller is configured to receive a signal indicating a desired torque and determine if the desired torque is between an upper threshold and a lower threshold. If the desired torque is between the upper threshold and the lower threshold, pulse width modulation is used to produce a PWM adjusted torque command, and the motor is commanded based on the PWM adjusted torque command. The PWM adjusted torque command is configured to cycle between the upper threshold and the lower threshold to produce the desired torque.
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公开(公告)号：US10666182B1
公开(公告)日：2020-05-26
申请号：US15947540
申请日：2018-04-06
申请人： Caterpillar Inc.
发明人： Carlos E. Nino Baron , Ahmed Khalil , Jackson Wai , Jesse R. Gerdes , Sangameshwar Sonth , Amir Saad
摘要： A control system for a rotary electric machine includes a controller configured to generate dynamic input current data based upon a dynamic analysis of self flux data, mutual flux data, and saturation scaling factor data. Upon generating a torque request, the controller is configured to determine a desired electrical input based upon the dynamic input current data to generate the desired output torque. The desired electrical input includes a magnitude and duration of an electrical pulse and a desired angular position of the rotor of the rotary electric machine relative to the stator of the machine. The controller determines an angular position of the rotor and generates an operating command to generate the desired electrical input at the desired angular position of the rotor to propel the rotary electric machine and generate the desired output torque. A rotary electric machine and method of operating same are provided.
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公开(公告)号：US20240097516A1
公开(公告)日：2024-03-21
申请号：US17947309
申请日：2022-09-19
申请人： Caterpillar Inc.
CPC分类号： H02K3/14 , H02K15/026 , H02K2203/15
摘要： An assembly for an electric motor includes a stator including a plurality of stator poles, each stator pole including a base end and a rotor end opposite the base end, and an electromagnetic coil around each stator pole. The coil around each stator pole includes at least two electrically conductive wires wound into multiple wire turns around the stator pole that extend from the base end of the stator pole to the rotor end of the stator pole. Wire turns of the coil closer to the rotor end of the stator pole are twisted and wire turns of the coil closer to the base end of the stator pole are not twisted.
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公开(公告)号：US20220200501A1
公开(公告)日：2022-06-23
申请号：US17132076
申请日：2020-12-23
申请人： Caterpillar Inc.
发明人： Jesse R. Gerdes , Thomas M. Sopko , Carlos E. Nino Baron , Jackson Wai , Ahmed Khalil , Sajan Abdul , Amara Ashfaq , James Michael Thorne
摘要： A work machine includes a frame, a traction system supporting the frame, a power source mounted on the frame, a switched reluctance motor, an inverter configured to control power to the motor from a power source, and a controller. The controller is configured to receive a signal indicating a desired torque and determine if the desired torque is between an upper threshold and a lower threshold. If the desired torque is between the upper threshold and the lower threshold, pulse width modulation is used to produce a PWM adjusted torque command, and the motor is commanded based on the PWM adjusted torque command. The PWM adjusted torque command is configured to cycle between the upper threshold and the lower threshold to produce the desired torque.
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