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公开(公告)号：US11052751B2
公开(公告)日：2021-07-06
申请号：US16349723
申请日：2017-01-20
Applicant: Jing-Jin Electric Technologies Co., Ltd.
Abstract: A coaxial propulsion system is provided, which comprises a housing, and two or more electric motors provided in the housing, wherein the electric motors share one common shaft. At least one of the two or more electric motors is a permanent-magnet synchronous motor, an asynchronous motor or a switched reluctance motor, and of different efficiency maps. The system can improve the power density and system efficiency of propulsion system while maintaining high performance output, to enhance the integration level, and reduce size, weight and cost.
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公开(公告)号：US10944349B2
公开(公告)日：2021-03-09
申请号：US16311889
申请日：2017-09-08
Applicant: JING-JIN ELECTRIC TECHNOLOGIES CO., LTD.
Inventor： Zifu Wang
IPC: H02P27/04 , H02P23/28 , H02M7/5387
Abstract: The present disclosure discloses a multi-inverter electric motor controller, which solves the technical problem that the existing inverter with silicon-based devices cannot accurately modulate high-frequency currents. The multi-inverter electric motor controller comprises a primary inverter and one or more secondary inverters, where the primary inverter and the secondary inverters connect in parallel to a same electrical motor, the primary inverter employs silicon-material power electronic devices, the secondary inverters employ wide-bandgap semiconductor power electronic devices, and the switching frequency of the primary inverter is less than the switching frequencies of the secondary inverters. According to the present disclosure, the existing inverter with silicon-based devices and the inverters with wide-bandgap semiconductor devices are connected in parallel, and can complete the fine control of the harmonic waves of high-frequency currents.
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公开(公告)号：US20190322166A1
公开(公告)日：2019-10-24
申请号：US16349723
申请日：2017-01-20
Applicant: Jing-Jin Electric Technologies Co., Ltd.
Abstract: The disclosure discloses a coaxial propulsion system with multiple electric motors, comprising a housing, two or more electric motors being provided in the housing, wherein the electric motors share one common shaft. Electric motor is a permanent-magnet synchronous motor, an asynchronous motor or a switched reluctance motor, and of different efficiency maps. The disclosure can improve the power density and system efficiency of propulsion system while maintaining high performance output, to enhance the integration level, and reduce size, weight and cost.
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