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 order to reduce the torque ripple and improve the torque-speed characteristic of switched reluctance motor, a novel predictive current control method is proposed in this paper. Compared with conventional current hysteresis control, the current tracing ability is improved by using proposed method without increasing switch frequency or changing hysteresis band. Both of torque ripples and copper loss...
Most of magnetic encoder ICs are on-axis, and they are generally suitable for inner rotor PMSM, sometimes used in external rotor PMSM. However, in some special occasions, these ICs are not used for the difficulty of mounting, for example, there is an external rotor PMSM with a hollow shaft, which is convenient for passing the control wire. It is difficult to mount these encoder ICs, because there...
Synchronous reluctance machine (SynRM) has attracted much attention thanks to the advantages such as low cost, rugged rotor structure and high efficiency. Conventional drive for the SynRM is the same as that for permanent magnet synchronous machine (PMSM), i.e., the sine-wave drive. In this paper, square-wave drive is proposed for the SynRM. The torque performances with square-wave drive are analyzed...
This paper presents a novel harmonic current injection method to optimize air-gap flux density distribution for multiphase induction machine. The control objective is to generate a nearly rectangular air-gap flux for better iron utilization. The proposed method uses air-gap field-oriented control and rotor field-oriented control to realize a real-time adjustment of the third harmonic current under...
This paper introduces nonlinear modeling of a new dual rotor machine named dual-rotor permanent magnet reluctance (DRPMR) machine. The paper proposes the varying magnetic network model of DRPMR machine considering possible saturation and nonlinearity according to its novel structure. The final results are verified by the finite element method (FEM) and results prove the validity of the proposed model.
Sensorless and torque control of Switched Reluctance Motors (SRMs) is a well-researched field. Many techniques rely on the measurement of phase inductance and or flux-linkage which can be significantly affected by the mutual phase inductance. By measuring the mutual inductance over an electrical cycle or at particular locations, the accuracy of the sensorless and torque control techniques can be improved...
This paper proposes a novel technique to estimate online the inductances of a Permanent Magnet Synchronous Machine (PMSM) based on the measurement of the current derivatives excited by two active-voltage vectors and one zero-voltage vector within a PWM cycle. The d- and q-axes inductances of PMSMs are calculated during normal operation of the drive system. The influence of the magnetic saturation...
We have proposed a claw pole type half-wave rectified variable field flux motor (CP-HVFM) with special self-excitation method. The claw pole rotor needs the 3D magnetic path core. This paper reports an analysis method with experimental BH and loss data of the iron powder core for FEM. And it shows a designed analysis model and characteristics such as torque, efficiency and loss calculation results.
This paper proposes a novel 16/10 segmented rotor switched reluctance machine (SSRM) for belt-driven starter generators (BSGs) of hybrid electric vehicles. The stator of proposed SSRM consists of two types of stator poles: exciting pole and auxiliary pole, and the rotor of proposed SSRM is made up of a series of discrete segments. Firstly, the concept of the conventional SRM and proposed machine is...
Position sensors like hall sensors, optical encoder and electromagnetic sensors are widely used in motor drive systems for providing reliable rotor positions for the motors like switched reluctance motors and brushless DC motors. However, the position measurement effects of most traditional sensors are highly dependent on the operational environmental conditions. In this paper, a method of using the...
This paper examines several techniques for determining the parameters of the Brushless Doubly Fed Reluctance Machine (BDFRM). Even though the mathematical model for this machine is like that of a double-fed induction machine, the very high leakage inductances prevent the use of the normal locked rotor/unloaded rotor tests. The accuracy of the parameters found is validated by machine testing and comparison...
With the increasing rotated speed of the magnetic electrical machine with active magnetic bearings (AMBs), improving the dynamic response and the resolution of the displacement sensor turn into a key problem. In this paper, a novel self-differential eddy current displacement sensor (ECDS) based on the Hartley principle for high-speed electrical machine was proposed. First, the integrated structure...
Aiming at the application of fan, pump and compressor load, a cost-effective sensorless drive control system of permanent magnet synchronous motor (PMSM) based on V/f control is proposed and realized in this paper. Aiming at the problem that conventional V/f control cannot maintain the stable operation in middle and high frequency domain and the load fluctuation, a method of adding the speed stabilizing...
The electrical machines are gaining more and more attentions nowadays, especially for the electric vehicle application. Compared with the radial flux machine, the axial flux machine can have higher torque density and efficiency due to its tight structure. However, most of the axial flux machines are designed with the surface mounted permanent magnets (PMs) rotor, where the reluctance torque ability...
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.