scholarly journals Thermal Analysis of Electric Machines for Combined Stirling Engine-Generator Performance

2021 ◽  
Vol 8 (3) ◽  
pp. 621-630
Author(s):  
V. Zogbochi ◽  
P. Chetangny ◽  
D. Chamagne
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Heat Engine ◽  
Thermal Characteristics ◽  
Heat Propagation ◽  
Stirling Engine ◽  
Electric Machine ◽  
Switched Reluctance ◽  
The One ◽  
Element Method

The performance of an electric machine depends on its ability to resist rising internal temperature and ambient temperature. In particular when it is a combination with a heat engine, it is essential to know the thermal characteristics of the electric machine in connection with its operating environment to decide which type of machine for a better result. This work will make a comparative thermal study of three types of generators namely: the permanent magnet generator (PMSG), the squirrel cage asynchronous generator (SCIG) and the switched reluctance generator (SRG), all driven by Stirling engine. The method involves solving the heat propagation equation to determine the thermal resistance network for each machine. The resolution of the network combined with the finite element method will allow a comparison of the temperature rise and its effect on the performance of each machine. The simulation results show that the temperature of the PMSG windings stabilizes at 430 K while that of the others stabilizes at 373 K and 346 K respectively. However, when comparing the performances for the specifications of this work (i.e., produce minimum electric power of 2kW at low speed generated by the Stirling engine), PMSG is the one that fulfil all the requirements. For the use of this machine for the generator set, it will be necessary to use magnets of types GNS-39EH whose operating temperature is approximately 473K (200 ° C) with magnetic induction of 1.22 T. Keywords: choice of machines, thermal network, Finite Element Method, machine’s performances, Stirling engine.

scholarly journals Thermal Analysis of Electric Machines for Combined Stirling Engine-Generator Performance

2021 ◽  
Vol 8 (3) ◽  
pp. 621-630
Author(s):  
V. Zogbochi ◽  
P. Chetangny ◽  
D. Chamagne
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Heat Engine ◽  
Thermal Characteristics ◽  
Heat Propagation ◽  
Stirling Engine ◽  
Electric Machine ◽  
Switched Reluctance ◽  
The One ◽  
Element Method

The performance of an electric machine depends on its ability to resist rising internal temperature and ambient temperature. In particular when it is a combination with a heat engine, it is essential to know the thermal characteristics of the electric machine in connection with its operating environment to decide which type of machine for a better result. This work will make a comparative thermal study of three types of generators namely: the permanent magnet generator (PMSG), the squirrel cage asynchronous generator (SCIG) and the switched reluctance generator (SRG), all driven by Stirling engine. The method involves solving the heat propagation equation to determine the thermal resistance network for each machine. The resolution of the network combined with the finite element method will allow a comparison of the temperature rise and its effect on the performance of each machine. The simulation results show that the temperature of the PMSG windings stabilizes at 430 K while that of the others stabilizes at 373 K and 346 K respectively. However, when comparing the performances for the specifications of this work (i.e., produce minimum electric power of 2kW at low speed generated by the Stirling engine), PMSG is the one that fulfil all the requirements. For the use of this machine for the generator set, it will be necessary to use magnets of types GNS-39EH whose operating temperature is approximately 473K (200 ° C) with magnetic induction of 1.22 T. Keywords: choice of machines, thermal network, Finite Element Method, machine’s performances, Stirling engine.

scholarly journals Influence of Control and Structure Parameters on the Starting Performance of a 12/8 Pole Switched Reluctance Motor

Energies ◽  
2020 ◽  
Vol 13 (14) ◽  
pp. 3744
Author(s):  
Jichao Han ◽  
Baojun Ge ◽  
Kai Zhang ◽  
Yang Wang ◽  
Chao Wang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Switched Reluctance Motor ◽  
Structure Parameters ◽  
Two Phase ◽  
Switched Reluctance ◽  
Reluctance Motor ◽  
Calculation Results ◽  
Starting Torque ◽  
Element Method

To investigate the influence of control and structure parameters on the starting performance of a switched reluctance motor, a 12/8 pole switched reluctance motor is analyzed in this paper. The novel field-circuit coupled finite element method of switched reluctance motor is proposed in the paper. The influence of the controller on the switched reluctance motor is considered. The influence of rotor initial position angle, starting mode, starting current, and structure parameters on the starting performance of the switched reluctance motor is studied using the field-circuit coupled finite element method. The starting performance of the switched reluctance motor is obtained under the different control and structure parameters. The alternating starting mode of single- and two-phase winding can improve the starting torque of switched reluctance motor (SRM). As the stator pole arc coefficient increases, the starting torque of SRM increases. The appropriate reduction of the air gap length can improve the starting torque of SRM. Experimental results of the prototype are compared with the calculation results, which verifies the reliability of the calculation method and accuracy of the calculation results.

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