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.
This paper proposes a novel scheme of reducing the commutation torque ripple of BLDC motors by injecting additional voltage in the non-commutating phase of the motor. The SIDO converter used in this work provides two independent output voltages with different magnitudes. One of the voltages (V1) is connected to Voltage Source Inverter (VSI) which runs BLDC motor. Another voltage (V2) provides an additional...
Advanced angle commutation is an effective approach to suppress the commutation torque ripple for doubly salient electromagnetic machine (DSEM). In this paper, the commutation process under “three-phase three-state” conduction mode is analyzed in detail at first. On this base, a novel self-optimizing control strategy of advanced commutation angle for DSEM is proposed, it starts with setting an initial...
In this paper an application of artificial neural controller for compensation of torque ripple in electrical drive with PMSM (Permanent Magnet Synchronous Motor) is presented. Due to cogging torque, electromagnetic torque ripple and also, current measurement error of the motor, are created a ripple of angular velocity, finally. This parasite phenomenon influence on the precision of control, especially...
Energy saving is arguably the most important factor in issues regarding energy and carbon emission. For electric vehicles in particular, saving energy extends the driving range. This can be achieved with a highly efficient variable-speed drive that can cover a wide speed range, and changing the number of poles is one way of realizing such a drive. In addition, electric vehicles must be fault tolerant...
Torque pulsation in permanent magnet synchronous motor impairs their performance in critical applications, particularly for direct-drive. A practical approach to compensation of selected torque harmonics is presented. The approach consists of two steps: identification of dominant torque harmonics (the cogging harmonics and the flux linkage harmonics) and cuckoo search algorithm to tune the compensation...
This paper addresses trade-off with starting capability to maximize efficiency of a small single-phase line-start permanent magnet motor. In general, as the number of main winding turns is higher, the induced electromotive force is higher. As a result, as the input current is reduced, the copper loss of the stator windings (main and auxiliary windings) is lower. Therefore, the motor efficiency is...
With the rapid development of electric vehicles, fault tolerance requirements of the motor used in electric vehicles become higher and higher. Multi-phase permanent magnet synchronous motors (PMSM) with their low torque ripple and high reliability and other advantages gradually become the main choice of electric vehicle drive motor. In this paper, taken six-phase double Y-shift 30° windings PMSM as...
This paper presents the design and analysis of an interior permanent magnet synchronous motor (IPMSM) with a novel tangentially magnetized rotor for refrigerant compressors in inverter air-conditioners. To reduce cogging torque, torque ripple, and the weight of magnet usage, a new salient pole rotor design is proposed using permanent magnets arranged for tangential magnetization. The results of magnetic...
Recently the multi-objective optimization of Interior Permanent Magnet Synchronous Motor (IPMSM) used for Electrical Vehicles (EVs) has attracted widely attention. However, it not only suffers from its lower optimization efficiency, but also is difficult to achieve the optimal solution. Therefore, an effective multi-objective optimization design scheme is presented which innovatively integrates Taguchi...
This paper suggests asymmetric stator teeth design to reduce torque ripple and back EMF Total Harmonic Distortion(THD) for Interior Permanent Magnet Synchronous Machine(IPMSM). IPMSM which has 8 poles, 12 slots is analyzed in this study. From changing design parameter in stator structure, 8 comparison models are analyzed. Analysis of proposed method is carried out using Finite Element Method(FEM)...
This paper proposes a simple duty cycle modulated direct torque control (DDTC) for permanent magnet synchronous motors (PMSMs). DDTC sequentially output an active vector and a zero vector during each control period. The duty cycle of active vector is obtained using a duty cycle generator according to the torque error, which can avoid the complex calculation process associated with conventional DDTC...
Torque calculation using the d-q axis has the advantage of faster execution time; however, the torque ripple cannot be considered in torque calculation using the d-q axis equivalent circuit because the time-dependent component is removed. In this work, with d-q transformation, the characteristics of some parameters were identified. These characteristics were considered for representing torque ripple...
The load torque observation issue for permanent magnet synchronous motor(PMSM) is studied in the paper, and a design method for exponential decay H∞ load torque observer is obtained. The disturbance rejection rate and the exponential decay rate of observation error can be specified through the studied designed method. So the required disturbance rejection and dynamic responsibility performance can...
This paper deals with issues created by the cogging torque exhibited in permanent magnet synchronous motors in a motor drive with field oriented control. Experimental results are shown for both the start-up procedure and the steady-state operation of the used motor. The static and cogging torque are also measured at low speed to optimize the parameters of the start-up algorithm.
Torque ripple exists at the output of permanent magnet synchronous motors (PMSMs) as a result of current measurement error, non-sinusoidal back-electromotive force (EMF), and cogging torque. Acoustic emissions caused by torque ripple coupling through the mechanical system and interacting with the motor housing limit the applications available to PMSMs. Since part of the cogging torque component is...
Inset permanent magnet (PM) synchronous motor (PMSM) has been widely used in various occasions due to its high efficiency and high torque density, such as the electric vehicle, wind power generation, ship propulsion, home appliances and other high precision machining and servo control systems [1]–[3].
In this paper, a Single Ended Primary Inductor Converter (SEPIC) fed brushless dc motor (BLDCM) incorporated with a torque ripple minimization scheme is developed for enhancing the power factor at supply mains and reducing the torque ripples. By varying dc link voltage, speed of BLDCM is regulated. Generally, current ripple is responsible for the presence of ripple in commutation torque. By inserting...
In the design process of permanent magnet synchronous motors (PMSMs), the hysteresis torque has so far been ignored under the understanding that it is already small enough. However, for some delicate applications, such as an exoskeleton wearable robot, the hysteresis torque, whose proportion increases under no-load or low-load conditions, needs to be further minimized even though the hysteresis torque...
Accurate measurement of rotor angle in Permanent Magnet Synchronous Motor (PMSM) drive applications is important when high performances as low level torque ripples are required. If the relationship between torque ripple and angle error is known, then, further steps can be done in order to reduce the level of the ripple. Based on an analytical description of the sensor model, a relationship between...
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.