A Novel Method for the Fast Calculation of the Characteristics of PM Synchronous Machines

2020 ◽  
Author(s):  
Constantin Wohlers ◽  
Bernd Ponick
Keyword(s):  
Synchronous Machines ◽  
Fast Calculation ◽  
Novel Method

scholarly journals A Novel Method for Harmonic Current Injection with Sensor Supported Adaptation on Permanent Magnet Synchronous Machines

Machines ◽  
2021 ◽  
Vol 9 (8) ◽  
pp. 139
Author(s):  
Matthias Vollat ◽  
Dominik Krahe ◽  
Frank Gauterin
Keyword(s):  
Permanent Magnet ◽  
Current Injection ◽  
Synchronous Machines ◽  
Permanent Magnet Synchronous Machine ◽  
Permanent Magnet Synchronous Machines ◽  
Harmonic Current ◽  
Harmonic Currents ◽  
Sensor Signals ◽  
Novel Method ◽  
Higher Harmonic

To reduce torque oscillations in electric motors, harmonic current injection (HCI) has been used in industry for some time. For this purpose, higher harmonic currents calculated in advance are injected into the machine. Since the general conditions for the machine can change during its life cycle, this article presents a method that makes it possible to change the parameters of HCI during operation. For this purpose, sensor signals are used to detect the reaction of the electric motor to small variations of the HCI parameters. The knowledge gained in this way is used to make further suitable variations. FEM simulations were used to verify the effectiveness of the approach. The results show that the algorithm can independently optimize the HCI parameters during runtime and reduces the amplitude of the 6th harmonic in the torque by 87% for a permanent magnet synchronous machine.

Calibrated Coarse Grid-Finite Volume Method for the Fast Calculation of the Underhood Flow of a Vehicle

2013 ◽  
Vol 135 (10) ◽  
Author(s):  
D. Langmayr ◽  
R. A. Almbauer ◽  
N. Peller ◽  
W. Puntigam ◽  
A. Lichtenberger
Keyword(s):  
Finite Volume ◽  
Cfd Simulation ◽  
3D Flow ◽  
Cfd Simulations ◽  
Fast Calculation ◽  
Novel Method ◽  
Computational Fluid Dynamics Cfd ◽  
Flow Through ◽  
Finite Volume Approach ◽  
Volume Method

In this paper we introduce a novel method for calculating 3D flow through the underhood compartement of a vehicle. The method is based on the system of Euler equations, which are numerically solved by a finite volume approach. The total number of finite volumes is very low (<1000 cells). The applied numerics are calibrated to recapture a preceding detailed computational fluid dynamics {CFD) simulation. This calibration is established by two sets of factors. The main advantage of the present approach is that the calibration factors can be inter- and extrapolated between different CFD simulations.

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