The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In this paper the virtual short pitch control model for a fully pitched switched reluctance machine (FPSRM) is presented. The simulated results proved that it is possible to control a FPSRM in the same way as a short pitch switched reluctance machine (SPSRM) when certain matrix conversions are used. Three virtual short pitch phases can then be controlled independently as for the SPSRM. This is implemented...
This paper discusses a DSP/FPGA-based control system for a permanent magnet machine with concentrated windings. In this setup each coil is driven by a separate H-bridge inverter. Operation is considered under normal and fault condition. An interleaved modulation technique is introduced and compared with two standard modulations. A control for a 12-slot 8-pole machine with field orientation in single...
Switched reluctance machines exhibit highly nonlinear characteristics which must be known to accurately model and control this machine type. These profiles are typically derived by finite-element analysis or measured on dedicated test benches. The aim of this paper is to propose a measurement procedure that requires only standard laboratory equipment. Moreover, a method is presented that allows the...
Recent publications have shown that the adverse acoustic behavior of automotive-size switched reluctance machines can be tackled by aid of Direct Instantaneous Force Control. The former work mainly focused on the functionality regarding acoustics. This paper, however, compares the drive losses between standard Hysteresis Current Control and Direct Instantaneous Force Control. Iron loss, copper loss...
It is well-known that electric vehicles emit high-frequency acoustic noise, which can be prejudicial to market acceptance. It has often been reported on vibration mode-shape 0 of the electrical machine. However, this vibration shape has never been characterized as the main noise source of the electrical traction machine for a broad variety of cars throughout the market. This paper examines the acoustic...
To make the development process of electric machines more efficient, it is very important to assess the characteristics of a given machine design early in the design process. In the case of a Switched Reluctance Machine in single-pulse operation, the efficiency is mainly determined by the turn-on and turn-off angle. These parameters on the other hand have a significant impact on the acoustic behavior...
The cost-efficient switched reluctance machine is highly appealing to the automotive industry. In this application acoustic noise is a crucial criterion, which is usually addressed during the design process. However, parasitic effects, such as rotor eccentricity, are normally not a design target but only a finding during the test of the prototype. This paper deduces a theory that mathematically describes...
Practical experience has shown that parasitic effects such as rotor eccentricity can have crucial influence on the performance of switched reluctance machines. Strong eccentricity can even be a knock-out criterion as it potentially causes additional acoustic noise and increased bearing wear. Nowadays only very few publications consider simulation methods without online finite-element analysis regarding...
An offline algorithm for induction machine parameter determination from power and torque measurements over several torque-slip curves is presented. Based on a parameter sensitivity function, the algorithm fits the measured data of torque, stator voltage amplitude and power factor to the parameters of an equivalent circuit of the induction machine which takes main inductance saturation, iron losses...
Rotor eccentricity is expected to cause vibrational and acoustic noise due to periodic unbalanced radial tooth forces. It thus should be analysed and modelled during the motor design even if no faults are present. The paper focuses on the consequences of rotor eccentricity using finite element analysis. Furthermore, a possible machine model for eccentricity simulation in a drive system is presented...
The automotive industry demands small and cheap drive trains to compensate for battery weight and cost. A fully integrated high-speed SRM drive train could be an answer to this demand. However, high-speed SRM exhibit some characteristic shortcomings such as torque ripple, acoustic noise and partly low efficiency. This paper presents a way to develop a concept which overcomes all these factors. This...
Lumped parameter thermal networks (LPTN) have been widely used for the thermal modeling of the electrical machine due to its low computing time. In spite of the simple structure of the network, much effort has to be invested to define the thermal circuit in a physically proper way. This paper discusses details of lumped parameter thermal modeling and explains where attention should be paid for an...
Even though plenty has been reported on the excellent advantages of SRM, its main challenge - the unpleasant acoustic behavior - is still fairly unresolved. Most SRM research not only has to cope with machine inherent noise but also with comparatively strong switching harmonics. The aim of this paper is not to completely solve the acoustic problem but to eliminate distinct switching harmonics by implementing...
Recently, it has been proposed to overcome the well-known acoustic problem of switched reluctance machines (SRM) by Direct Instantaneous Force Control (DIFC). By now, DIFC has employed a PWM-based dead-beat controller which causes strong modulation-related harmonics in the spectrum and does not adapt to the non-constant dynamics of the SRM. This paper aims to overcome both problems by hysteresis-based...
This paper presents a universal acoustic modeling process for efficient, high-quality acoustic modeling of electrical drives. It combines the two fast and user-interactive steps system simulation and vibration synthesis. The underlying model parameters are obtained via automated offline finite-element simulations based on generic input parameters. This allows using complex electromagnetic and structural...
A new versatile and modular hardware platform for distributed real-time simulation is presented in this paper. The system is aimed at large-scale simulation on system level but with the ability to include simulation of switched power electronics for hardware-in-the-loop components connected to single nodes of the simulated system. High complexity is possible through parallelization on the system level...
Acoustic noise and vibration of electrical machines becomes increasingly relevant. The determination of equivalent mechanical material parameters of electrical steel is therefore necessary to bound the computational costs of the structural dynamic simulation to practical levels. An analytical model based on fundamental laws of mixture is compared to three different experimental approaches to from...
A comprehensive procedure allows an efficient and fast design of switched reluctance machines (SRM) by understanding the influence of relevant design parameters. So far, guides in literature use empirical values to set parameters, require extensive parameter variation or do not cover the whole design process. This paper addresses the complete electromagnetic dimensioning of rotor and stator geometry...
In this survey we introduce a simple high-gain based adaptive controller — the funnel controller — which neither identifies nor estimates the system under control. The proportional funnel controller is applicable for all (nonlinear) systems with relative degree one or two, stable zero-dynamics (e.g. minimum-phase in the linear case) and known sign of the high-frequency gain; hence only structural...
To be able to use film capacitances in the dc-link of single phase chargers, the needed capacity has to be reduced. This can be achieved by directly controlling the dc-link voltage with the high bandwidth of the dc-dc converter, but in this case the complete fluctuation of the grid power is seen by the battery. In order to reduce the stress on batteries through micro cycles and to increase the efficiency...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.