Current Injection Networks for the Third-Harmonic Current Injection

2007 ◽  
pp. 91-115
Keyword(s):  
Current Injection ◽  
Harmonic Current ◽  
Third Harmonic ◽  
The Third

scholarly journals Third harmonic current injection into highly saturated multi-phase machines

2017 ◽  
Vol 66 (1) ◽  
pp. 179-187
Author(s):  
Felix Klute ◽  
Torben Jonsky
Keyword(s):  
Current Injection ◽  
Saturation Level ◽  
Permanent Magnet Synchronous Machines ◽  
Flux Linkage ◽  
Harmonic Current ◽  
Fem Model ◽  
Third Harmonic ◽  
The Third ◽  
Rotor Flux ◽  
Multi Phase

Abstract One advantage of multi-phase machines is the possibility to use the third harmonic of the rotor flux for additional torque generation. This effect can be maximised for Permanent Magnet Synchronous Machines (PMSM) with a high third harmonic content in the magnet flux. This paper discusses the effects of third harmonic current injection (THCI) on a five-phase PMSM with a conventional magnet shape depending on saturation. The effects of THCI in five-phase machines are shown in a 2D FEM model in Ansys Maxwell verified by measurement results. The results of the FEM model are analytically analysed using the Park model. It is shown in simulation and measurement that the torque improvement by THCI increases significantly with the saturation level, as the amplitude of the third harmonic flux linkage increases with the saturation level but the phase shift of the rotor flux linkage has to be considered. This paper gives a detailed analysis of saturation mechanisms of PMSM, which can be used for optimizing the efficiency in operating points of high saturations, without using special magnet shapes.

scholarly journals A compare research on third harmonic current control for five-phase permanent magnet synchronous motor

2021 ◽  
Vol 39 (4) ◽  
pp. 865-875
Author(s):  
Tianxing Li ◽  
Ruiqing Ma ◽  
Hao Bai ◽  
Ping Fan ◽  
Yuchen Zhang
Keyword(s):  
Permanent Magnet ◽  
Permanent Magnet Synchronous Motor ◽  
Reference Value ◽  
Synchronous Motor ◽  
Electromagnetic Torque ◽  
Harmonic Current ◽  
Third Harmonic ◽  
The Third ◽  
Current Reference ◽  
Maximum Current

The injection of a third harmonic current can improve the electromagnetic torque output of the five-phase permanent magnet synchronous motor. In this paper, constant copper consumption and constant maximum current are used as constraints, and the influence of the ratio between the third harmonic current and the fundamental current on the electromagnetic torque under the two constraints is analyzed. The electromagnetic torque is the largest when the third harmonic current reference value is equal to the fundamental current reference value of ψf3/ψf times under the premise of the constant copper loss. On the premise that the maximum current is constant, the electromagnetic torque is the largest when the third harmonic current reference value is equal to the fundamental current reference value of kw/(6kw-kw3/3) times. On this basis, according to the vector amplitude, phase and action time, the changing trends of maximum voltage utilization rate with Vref3/Vref1 under three different kinds of methods are given. Finally, through the experimental platform, the control effects of the three kinds of SVPWM are compared under two constraint conditions.

Third-Harmonic Current Injection for Wear-out Reduction in Single-Phase PV Inverters

2021 ◽  
pp. 1-1
Author(s):  
Rafaela de Paula Silva ◽  
Diogo Borges Da Silveira ◽  
Rodrigo Cassio De Barros ◽  
Joao Marcus Soares Callegari ◽  
Allan Fagner Cupertino ◽  
...  
Keyword(s):  
Single Phase ◽  
Current Injection ◽  
Harmonic Current ◽  
Third Harmonic
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