http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Zichong Zhu (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
-
A New Rotor Structure for High Speed Flywheel Permanent Magnet Synchronous Machine
Zichong Zhu,Yunkai Huang,Jianning Dong,Fei Peng 한국자기학회 2019 Journal of Magnetics Vol.24 No.3
This paper presents a new rotor design with assembled permeable retaining sleeve (APRS) to improve performances of a high speed permanent magnet synchronous machine (PMSM). The APRS consists of equal number of permeable and nonmagnetic parts, which are alternately arranged and assembled together circumferentially via keyways. Electromagnetic and mechanical characteristics of the rotor applied to a high speed flywheel PMSM are analyzed using finite element method. Machine performances are compared to an original design with commonly used rotor structure. It shows that phase inductance of the high speed machine increases dramatically due to smaller effective air gap, which may benefit suppressing inverter current harmonics. Also, permanent magnet usage reduces by 9.4 % to obtain identical back electromotive force and torque constant. In addition, a smaller skin depth owing to high-permeability material and the circumferential segmentation of the retaining sleeve effectively reduce rotor eddy current. Associated loss decreases by 40.7 % under open-circuit condition. A prototype rotor is fabricated and preliminary experimental tests are performed to confirm the analysis results.
-
Variation Regularity of Key Performance Indexes Against the Slot Number of Tooth-Coil PMSMs
Zhu Zichong,Ge Wenjie,Mei Lei,Huang Yunkai 대한전기학회 2024 Journal of Electrical Engineering & Technology Vol.19 No.4
Tooth-coil permanent magnet synchronous machines (TC-PMSMs) are commonly used in wind power generation and wheelhub propulsion applications. These machines operate at low speeds and have a large number of poles and slots, providing various pole/slot combinations as options. Typically, these combinations have similar performances, making it challenging to choose the best one from diff erent perspectives. This study focuses on 32-pole TC-PMSMs with diff erent slot numbers to understand how key electromagnetic and thermal performance indicators vary with slot numbers. Using the fi nite element method, parameters such as torque density, cogging torque, inductance, fl ux-weakening capability, losses, and temperature rise are evaluated and compared. Prototypes of the wheel-hub TC-PMSM are manufactured and tested on a back-to-back test rig, to validate the analysis results. The fi ndings and conclusions derived from this research can assist in determining the optimal slot number or narrowing down the selection range of competitive pole/slot combinations during the scheme comparison stage.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
