Optimization of an 80 kW Radial-Radial Flux Compound-Structure Permanent-Magnet Synchronous Machine Used for HEVs

Liu, Yong; Tong, Chengde; Bai, Jingang; Yu, Shuang; Tong, Weiming; Fu, Weinong

doi:10.1109/tmag.2011.2157325

Cited by 18 publications

(6 citation statements)

References 10 publications

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“…There are several PMSM control strategies, such as i d = 0 control, maximum torque per ampere (MTPA) control, maximum speed per voltage (MSPV) control, unity power factor (UPF) control, loss model control (LMC) and etc. [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24]. The i d = 0 control is the most conventional vector control method used in PMSM drive systems.…”

Section: Introductionmentioning

confidence: 99%

“…The i d = 0 control is the most conventional vector control method used in PMSM drive systems. In [9][10][11], the finite element method (FEM) is used to calculate the motor loss, and the i d = 0 control is used to drive the PMSM system to verify the performance of a PMSM. By keeping the motor current in the d-axis at zero, the i d = 0 control can make the electromagnetic torque and q-axis motor current proportional, and will not damage the magnetic properties of the permanent magnet.…”

Section: Introductionmentioning

confidence: 99%

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System Efficiency Improvement for Electric Vehicles Adopting a Permanent Magnet Synchronous Motor Direct Drive System

Zhang

Guo

et al. 2017

Energies

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To improve the endurance mileage of electric vehicles (EVs), it is important to decrease the energy consumption of the Permanent Magnet Synchronous Motor (PMSM) drive system. This paper proposes a novel loss optimization control strategy named system efficiency improvement control which can optimize both inverter and motor losses. A nonlinear power converter loss model is built to fit the nonlinear characteristics of power devices. This paper uses double Fourier integral analysis to analytically calculate the fundamental and harmonic components of motor current by which the fundamental motor loss and harmonic motor loss can be accurately analyzed. From these loss models, a whole-frequency-domain system loss model is derived and presented. Based on the system loss model, the system efficiency improvement control method applies the genetic algorithm to adjust the motor current and PWM frequency together to optimize the inverter and motor losses by which the system efficiency can be significantly improved without seriously influence on the system stability over the whole operation range of EVs. The optimal effects of system efficiency is verified by the experimental results in both Si-IGBT-based PMSM system and SiC-MOSFET-based system.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

System Efficiency Improvement for Electric Vehicles Adopting a Permanent Magnet Synchronous Motor Direct Drive System

Zhang

Guo

et al. 2017

Energies

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“…However, the improvement of power density for these motors is limited due to the simple structure [5,6]. In order to improve the power density, a large number of researchers have paid more attention to special motors such as dual-stator permanent synchronous motor (DSPMSM) [7][8][9][10], dual-rotor permanent synchronous motor (DRPMSM) [11][12][13][14] and compound structure PMSM (CSPMSM) [15,16], which all contain double air gaps and can output more torque and power. Therefore, these motors are more suitable to be used in EVs.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Electromagnetic, Thermal and Mechanical Characteristics of a Five-Phase Dual-Rotor Permanent-Magnet Synchronous Motor

Zhao

Liu

et al. 2015

Energies

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This paper investigates of a kind of five-phase dual-rotor permanent-magnet synchronous motor (DRPMSM), which contains dual rotors and a single stator. This kind of motor has the potential advantages of high power density, high reliability and high efficiency, which make it more appropriate for using in electric vehicles (EVs). In order to evaluate the most suitable power level for this kind of structure, the electromagnetic, the thermal and the mechanical characteristics are investigated in this paper. The length to diameter ratio of motors is researched to obtain the highest power density and then the optimum ratio is obtained. Based on the optimum ratio, the thermal characteristics are researched under natural condition and forced-air cooling condition with different wind speeds. In addition, the mechanical characteristics are analyzed under no-load and different loads conditions, respectively. All of the results are analyzed by two-dimension (2-D) and three-dimension (3-D) finite element method (FEM) simulation, which provide a good reference to select suitable power level for this kind of motor structure. Finally, a DRPMSM prototype is manufactured and tested. The experimental results effectively verify the FEM results.

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“…This mainly benefits from the utilization of a planetary gear unit for power splitting in the Prius hybrid system [6][7][8]. The planetary gear unit with two machines enables the internal combustion engine (ICE) to operate at optimum efficiency during all driving conditions by controlling its torque and speed [2,[6][7][8][9]], yet adds additional mechanical complexity and maintenance issues [10][11][12]. To get rid of the planetary gear unit, a compound-structure permanent-magnet synchronous machine (CS-PMSM) is proposed [13,14].…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Cooling and Thermal-Measuring System of a Compound-Structure Permanent-Magnet Synchronous Machine

et al. 2014

Self Cite

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Abstract:The compound-structure permanent-magnet synchronous machine (CS-PMSM) is a power-split device which can enable the internal combustion engine (ICE) to operate at optimum efficiency during all driving conditions by controlling its torque and speed. However, the CS-PMSM has more serious temperature rise and heat dissipation problems than conventional permanent-magnet (PM) machines, especially when the CS-PMSM is running at low speed and under full load conditions. As the thermal resistance of double-layer air gaps is quite big, the hot spot proves to be in the inner winding rotor. To ensure the safe operation of the CS-PMSM, the use of forced-air and water cooling in the inner winding rotor are investigated. The study shows that the water cooling can provide a better cooling effect, but require a complicated mechanical structure. Considering the complexity of the high efficiency cooling system, a real-time temperature monitoring method is proposed and a temperature measuring system which can accurately measure the real-time temperature of multiple key points in the machine is developed to promptly adjust the operating and cooling conditions based on the measured temperature results. Finally, the temperature rise experiment of the CS-PMSM prototype is done and the simulation results are partly validated by the experimental data.

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Optimization of an 80 kW Radial-Radial Flux Compound-Structure Permanent-Magnet Synchronous Machine Used for HEVs

Cited by 18 publications

References 10 publications

System Efficiency Improvement for Electric Vehicles Adopting a Permanent Magnet Synchronous Motor Direct Drive System

System Efficiency Improvement for Electric Vehicles Adopting a Permanent Magnet Synchronous Motor Direct Drive System

Investigation of Electromagnetic, Thermal and Mechanical Characteristics of a Five-Phase Dual-Rotor Permanent-Magnet Synchronous Motor

Investigation of the Cooling and Thermal-Measuring System of a Compound-Structure Permanent-Magnet Synchronous Machine

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