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Lumped-Parameter Thermal Analysis and Experimental Validation of Interior IPMSM for Electric Vehicle
Qixu Chen,Zhongyue Zou 대한전기학회 2018 Journal of Electrical Engineering & Technology Vol.13 No.6
A 50㎾-4000rpm interior permanent magnet synchronous machine (IPMSM) applied to the high-performance electric vehicle (EV) is introduced in this paper. The main work of this paper is that a 2-D T-type lumped-parameter thermal network (LPTN) model is presented for IPMSM temperature rise calculation. Thermal conductance matrix equation is generated based on calculated thermal resistance and loss. Thus the temperature of each node is obtained by solving thermal conductance matrix. Then a 3-D liquid-solid coupling model is built to compare with the 2-D T-type LPTN model. Finally, an experimental platform is established to verify the above-mentioned methods, which obtains the measured efficiency map and current wave at rated load case and overload case. Thermocouple PTC100 is used to measure the temperature of the stator winding and iron core, and the FLUKE infrared-thermal-imager is applied to measure the surface temperature of IPMSM and controller. Test results show that the 2-D T-type LPTN model have a high accuracy to predict each part temperature.
Lumped-Parameter Thermal Analysis and Experimental Validation of Interior IPMSM for Electric Vehicle
Chen, Qixu,Zou, Zhongyue The Korean Institute of Electrical Engineers 2018 Journal of Electrical Engineering & Technology Vol.13 No.6
A 50kW-4000rpm interior permanent magnet synchronous machine (IPMSM) applied to the high-performance electric vehicle (EV) is introduced in this paper. The main work of this paper is that a 2-D T-type lumped-parameter thermal network (LPTN) model is presented for IPMSM temperature rise calculation. Thermal conductance matrix equation is generated based on calculated thermal resistance and loss. Thus the temperature of each node is obtained by solving thermal conductance matrix. Then a 3-D liquid-solid coupling model is built to compare with the 2-D T-type LPTN model. Finally, an experimental platform is established to verify the above-mentioned methods, which obtains the measured efficiency map and current wave at rated load case and overload case. Thermocouple PTC100 is used to measure the temperature of the stator winding and iron core, and the FLUKE infrared-thermal-imager is applied to measure the surface temperature of IPMSM and controller. Test results show that the 2-D T-type LPTN model have a high accuracy to predict each part temperature.
Effect of Axial-Layered Permanent-Magnet on Operating Temperature in Outer Rotor Machine
Phuong Thi Luu,Ji-Young Lee,Ji-Won Kim,Yon-Do Chun,Hong-Seok Oh 대한전기학회 2018 Journal of Electrical Engineering & Technology Vol.13 No.6
This paper discusses the thermal effect of the number of permanent-magnet (PM) layers in an outer rotor machine. Depending on the number of axial-layer of PM, the operating temperature is compared analytically and experimentally. The electromagnetic analysis is performed using 3-dimensional time varying finite element method to get the heat sources depending on axial-layered PM models. Then thermal analysis is conducted using the lumped-parameter-thermal-network method for each case. Two outer rotor machines, which have the different number of axial-layer of PM, are manufactured and tested to validate the analysis results.
Effect of Axial-Layered Permanent-Magnet on Operating Temperature in Outer Rotor Machine
Luu, Phuong Thi,Lee, Ji-Young,Kim, Ji-Won,Chun, Yon-Do,Oh, Hong-Seok The Korean Institute of Electrical Engineers 2018 Journal of Electrical Engineering & Technology Vol.13 No.6
This paper discusses the thermal effect of the number of permanent-magnet (PM) layers in an outer rotor machine. Depending on the number of axial-layer of PM, the operating temperature is compared analytically and experimentally. The electromagnetic analysis is performed using 3-dimensional time varying finite element method to get the heat sources depending on axial-layered PM models. Then thermal analysis is conducted using the lumped-parameter-thermal-network method for each case. Two outer rotor machines, which have the different number of axial-layer of PM, are manufactured and tested to validate the analysis results.
Soo-Hwan Park,Jin-Cheol Park,Jun-Woo Chin,Hyeon-Jin Park,Soon-O Kwon,Sung-Il Kim,Myung-Seop Lim 한국자기학회 2019 Journal of Magnetics Vol.24 No.4
This paper proposes a design method of the surface-mounted permanent magnet synchronous motor using electromagnetic and thermal analysis. Since the electromagnetic and thermal fields are related, the permanent magnet synchronous motor should be considered not only in terms of the power density but also the thermal characteristics. The analytic method was used to investigate the power density of the concentrated winding model using the same number of poles. In the thermal design process, the analytic prediction was carried out by using the electromagnetic and thermal analysis called the lumped parameter thermal network (LPTN). The optimized geometry and losses which were calculated by the electromagnetic finite-element analysis were considered in the LPTN. As a result, an improved model was designed with superior power density and thermal characteristics to the prototype. Finally, the experiments were conducted to verify the validity of the design process and results.
DCT용 자속집중형 동기전동기의 회전자 형상 등가화를 통한 열 해석
손동균(Dong-Kyun Son),진준우(Jun-Woo Chin),홍정표(Jung-Pyo Hong) 한국자동차공학회 2017 한국자동차공학회 부문종합 학술대회 Vol.2017 No.5
This paper presents a thermal model of Concentrated Flux-type Synchronous Motor(CFSM) for Dual Clutch Transmission(DCT) applying the equivalent rotor model. In order to perform the thermal analysis of CFSM using Lumped Parameter Thermal Network(LPTN), the shape of motor is reflected as hollow cylinder. Especially for the rotor of CFSM, the area, outer and inner diameter of the permanent magnet were constantly equalized. Conduction and convection thermal resistances were calculated by using dimensions of the equivalent rotor model. Then, the losses such as copper loss, iron loss, and mechanical loss are calculated and applied to the LPTN as heat sources. The heat capacity, which enables the transient thermal analysis, is calculated by using dimensions and the material properties. Finally, the temperature characteristics of each part of the CFSM are predicted using LPTN.
수소 전기차 공기압축기용 초고속 모터의 PWM 고조파 전류에 대한 온도 특성 예측
임소연(So-Yeon Im),박수환(Soo-Hwan Park),김재현(Jae-Hyun Kim),임명섭(Myung-Seop Lim) 한국자동차공학회 2021 한국자동차공학회 부문종합 학술대회 Vol.2021 No.6
The fuel cell electric vehicle’s air compressor is driven by an ultra-high-speed(UHS) surface-mounted permanent magnet synchronous motor(SPMSM). UHS SPMSM has a large electromagnetic losses due to high rotational speed. Motor losses increase the temperature inside the motor. Increased motor temperature can cause deterioration in motor performance. In addition, since the motor is driven by an inverter, pulse width modulation(PWM) harmonic current is input to the motor. Since the PWM harmonic current increases the electromagnetic losses of the motor, it is necessary to analyze the effect of the PWM harmonic current on the temperature distribution of the motor. In this paper, the inverter simulation is conducted to predict the PWM harmonic current waveform, and the temperature distribution of the motor due to the PWM harmonic current is predicted through the lumped parameter thermal network (LPTN).
전기자동차 구동모터의 자기포화와 온도변화를 고려한 1D 모델링과 시뮬레이션
안성호(Sungho Ahn),민승재(Seungjae Min) 대한기계학회 2021 대한기계학회 춘추학술대회 Vol.2021 No.11
This study proposes 1D simulation model of electric vehicle whose objective is to consider both magnetic saturation and varying temperature of permanent magnet traction motor during operation. The electromagnetic parameters such as torque and losses are determined from maps constructed in advance by finite element analysis at different combinations of current, motor speed and permanent magnet temperature. The temperature change of the motor is calculated using lumped parameter thermal network (LPTN), which is computationally efficient model for thermal analysis of motor. As the LTPN is integrated in the simulation model, iterative process of analyzing the operating scenario is not required. Appling the proposed model to Worldwide Harmonised Light Vehicle Test Procedure (WLTP) class 3 driving cycle, it is confirmed that the model reflects varying efficiency of the motor depending on the temperature well. Also, reasonable time is spent on both preparing maps and simulation.