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Review of Thermal Design of SiC Power Module for Motor Drive in Electrical Vehicle Application
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作者 Puqi Ning Xiaoshuang Hui +3 位作者 Dongrun Li Yuhui Kang Jiajun Yang chaohui liu 《CES Transactions on Electrical Machines and Systems》 EI CSCD 2024年第3期332-346,共15页
In the current vehicle electric propulsion systems,the thermal design of power modules heavily relies on empirical knowledge,making it challenging to effectively optimize irregularly arranged Pinfin structures,thereby... In the current vehicle electric propulsion systems,the thermal design of power modules heavily relies on empirical knowledge,making it challenging to effectively optimize irregularly arranged Pinfin structures,thereby limiting their performance.This paper aims to review the underlying mechanisms of how irregularly arranged Pinfins influence the thermal characteristics of power modules and introduce collaborative thermal design with DC bus capacitor and motor.Literature considers chip size,placement,coolant flow direction with the goal of reducing thermal resistance of power modules,minimizing chip junction temperature differentials,and optimizing Pinfin layouts.In the first step,algorithms should efficiently generating numerous unique irregular Pinfin layouts to enhance optimization quality.The second step is to efficiently evaluate Pinfin layouts.Simulation accuracy and speed should be ensured to improve computational efficiency.Finally,to improve overall heat dissipation effectiveness,papers establish models for capacitors,motors,to aid collaborative Pinfin optimization.These research outcomes will provide essential support for future developments in high power density motor drive for vehicles. 展开更多
关键词 Thermal design Power module Pinfin Motor drive
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腹腔加压气溶胶化疗治疗结直肠癌腹膜转移研究进展
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作者 曹洪涛 王腾飞 +3 位作者 吴勇 杨劭卿 刘超慧(综述) 韩振国(审校) 《中国肿瘤临床》 CAS CSCD 北大核心 2023年第14期740-745,共6页
腹膜转移是结直肠癌的常见转移方式,即使进行积极治疗,结直肠癌腹膜转移患者的预后仍较差。近年来,腹腔加压气溶胶化疗(pressurized intraperitoneal aerosol chemotherapy,PIPAC)作为一种新的腹腔内化疗方式受到了广泛关注,全球多个国... 腹膜转移是结直肠癌的常见转移方式,即使进行积极治疗,结直肠癌腹膜转移患者的预后仍较差。近年来,腹腔加压气溶胶化疗(pressurized intraperitoneal aerosol chemotherapy,PIPAC)作为一种新的腹腔内化疗方式受到了广泛关注,全球多个国家的研究者开展了大量与PIPAC相关的前瞻性研究和临床试验,对于腹膜癌患者来说,PIPAC已成为一种安全有效的且有前景的治疗方式,多个医疗中心已经将其用于治疗腹膜癌患者。随着PIPAC相关的临床证据越来越多,其在临床中的应用越发受到重视。本文就PIPAC治疗结直肠癌腹膜转移的理论基础、发展历程、操作流程、适应证、禁忌证、药物方案和临床应用的最新进展进行综述,以期为临床实践和研究提供参考。 展开更多
关键词 结直肠癌 腹腔加压气溶胶化疗 腹膜转移
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Research on Inter-turn Short-circuit Fault Diagnosis Method Based on High Frequency Voltage Residual for PMSM
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作者 Xiaobao Feng Bo Wang +2 位作者 chaohui liu Jiayun Zeng Zheng Wang 《CES Transactions on Electrical Machines and Systems》 CSCD 2023年第3期256-265,共10页
Inter-turn fault is a serious stator winding short-circuit fault of permanent magnet synchronous machine(PMSM). Once it occurs, it produces a huge short-circuit current that poses a great risk to the safe operation of... Inter-turn fault is a serious stator winding short-circuit fault of permanent magnet synchronous machine(PMSM). Once it occurs, it produces a huge short-circuit current that poses a great risk to the safe operation of PMSM. Thus, an inter-turn short-circuit fault(ITSCF) diagnosis method based on high frequency(HF) voltage residual is proposed in this paper with proper HF signal injection. First, the analytical models of PMSM after the ITSCF are deduced. Based on the model, the voltage residual at low frequency(LF) and HF can be obtained. It is revealed that the HF voltage residual has a stronger ITSCF detection capability compared to the LF voltage residual. To obtain optimal fault signature, a 3-phase symmetrical HF voltage is injected into the machine drive system, and the HF voltage residuals are extracted. The fault indicator is defined as the standard deviation of the 3-phase HF voltage residuals. The effectiveness of the proposed ITSCF diagnosis method is verified by experiments on a triple 3-phase PMSM. It is worth noting that no extra hardware equipment is required to implement the proposed method. 展开更多
关键词 Inter-turn short-circuit fault(ITSCF) Permanent magnet synchronous machine(PMSM) High frequency(HF)injection Voltage residual Fault diagnosis
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Message from Editors
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作者 Xuhui Wen Tao Fan +10 位作者 Dong Jiang Yinye Yang Xin Zhang Yan Xu Xinhua Guo Shuangxia Niu chaohui liu Yihua Hu Pinjia Zhang Zhaoshun Gao Puqi Ning 《CES Transactions on Electrical Machines and Systems》 CSCD 2023年第3期237-238,共2页
THE rapid growth of new energy vehicles is accelerating the low-carbon transition in the global transportation sector. According to the international energy agency report, more than 10 million electric vehicles(EVs) i... THE rapid growth of new energy vehicles is accelerating the low-carbon transition in the global transportation sector. According to the international energy agency report, more than 10 million electric vehicles(EVs) including pure electric and hybrid models were sold worldwide in 2022, which means that the global share of electric vehicles in the overall automotive market has risen from less than 5% in 2020 to 14% in 2022. 展开更多
关键词 AUTOMOTIVE TRANSPORTATION risen
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Design and experiment of variable rate orchard sprayer based on laser scanning sensor 被引量:12
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作者 Longlong Li Xiongkui He +5 位作者 Jianli Song Yajia liu Aijun Zeng liu Yang chaohui liu Zhixiong liu 《International Journal of Agricultural and Biological Engineering》 SCIE EI CAS 2018年第1期101-108,共8页
During different growth periods,canopy size and density in orchards are variable,which need application conditions(flow rate and air flow)to be adjusted to match the canopy’s characteristics.In order to improve orcha... During different growth periods,canopy size and density in orchards are variable,which need application conditions(flow rate and air flow)to be adjusted to match the canopy’s characteristics.In order to improve orchard sprayer’s automatic operating performance,an automatic variable-rate orchard sprayer(VARS)fixed with 40 electromagnetic valves and 8 brushless fans was developed based on the canopy’s spatial dimensions.Each solenoid valve and brushless motor can be individually adjusted in real-time through pulse width modulation(PWM)signals emitted by a control system to adjust each nozzle’s spout and fan rotation speed.A high-precision laser scanning sensor(light detecting and ranging,LIDAR)was adopted as the detector to measure the canopy volume using the variable rate algorithm principle.Field experiments were conducted in an apple orchard,and conventional air blast sprayer(CABS)and directed air-jet sprayer(DAJS)were tested as a comparison.Results showed that on average,46%less spraying solution was applied compared to conventional applications,while penetration rate was similar to DAJS.Normalized deposition in the canopy with variable application was higher than that of conventional applications,indicating that electronic sprayers are more efficient than conventional sprayers.It was also observed that VARS could significantly reduce off-target loss.The field experiment showed that the newly developed variable-rate sprayer can greatly reduce pesticide use and protect the environment for the orchard fruit production,and also provide a reference for design and performance optimization for plant protection machinery. 展开更多
关键词 variable rate ORCHARD SPRAYER spatial dimension air volume flow rate laser scanning sensor precision agriculture
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