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.
The paper proposes an implementation of a motion sensorless control system in a very wide speed range — from zero speed operation, based on direct and quadrature inductance components of the stator flux linkage for the interior permanent magnet synchronous motor-IPMSM, without signal injection. The proposed observer is developed using the Lyapunov design, resulting a scheme with a full observer for...
This paper proposes a new high-bandwidth speed sensorless field orientated control system for interior permanent magnet synchronous motor drives for wide speed range operation, including standstill. The sliding mode observer is used for joint stator flux and rotor speed estimation at all speeds. At low speeds, the flux vector estimate of the observer is enhanced by the fundamental PWM excitation technique...
This paper presents a model predictive control technique for standalone doubly fed induction generators (DFIGs) without using position sensor. The technique uses a discrete-time model of the system to predict the future value of the rotor current for all possible voltage vectors generated by the rotor side converter (RSC). In this study, due to computational simplicity, the absolute error is selected...
Dynamic states of a synchronous machine, i.e. rotor angle and rotor speed, are important variables for power system control, studies and analysis. Availability or estimating of these variables would help us to monitor effectively the stability condition of the power systems in order to develop local or wide-area control loop to improve power system stability and reliability. To estimate the rotor...
This paper investigates a control strategy for grid-connected wind energy conversion systems with doubly-fed induction generators, that employs a novel d-q hysteresis current regulator in the inner control loops. Although the current control is implemented in a rotating reference frame synchronous to the positive sequence space vector of the grid voltage, it can be used to generate negative sequence...
The micro-Doppler spectrogram depends on parts of a target moving and rotating in addition to the main body motion (e.g., spinning rotor blades) and is thus characteristic for the type of target. In this study, the micro-Doppler spectrogram is exploited to distinguish between birds and small unmanned aerial vehicles (UAVs). The focus hereby is on micro-Doppler features enabling fast classification...
This paper proposes a simulation model of an adaptive optimal control strategy for the traction drive of the hybrid electric vehicle. The control unit has to ensure the stability of the power network at different operating conditions. Moreover, the optimal design of the controller is required for the power management in order to reduce the energy losses during acceleration and braking processes. The...
This paper proposes a simple and effective scheme for Direct Torque Control (DTC) of Brushless DC Motor. Unlike the traditional DTC where both the torque and flux must to be employed in order to deliver the switching table for the inverter, the proposed DTC scheme utilizes only the torque information. By considering the particular operating principle of the motor, the instantaneous torque can be estimated...
The stator current signals of induction motors are often used to detect the broken rotor bar faults. However, the detection work becomes rather tedious owing to the fact that the fundamental supply frequency is much greater and quite close to the fault frequency. To get rid of this difficulty, the use of filters is often employed. Besides the fundamental supply frequency, the filter methods used tend...
In the present work an analytical investigation of the behavior of the subsynchronous cascade drive at certain slip values is carried out, specifically at the multiples of 1/6. The drive behavior at these slip values has caused controversy among the researchers in the past. With the help of the space vector theory an analytical investigation is carried out which shows a specific synchronization of...
In recent years, there is an increasing interest in adopting synchronous reluctance machines for several applications. This is due to two main factors. The first is the increasing and highly variable cost of rare-earth permanent magnet (PM), such as NdFeB and SmCo. The second is the requirement for more efficient machines with respect to induction machines in general applications. However, a drawback...
The paper investigates methods for achieving really wide constant power speed range in electric drives. In particular, focusing the attention to hybrid excitation synchronous machines, five control strategies are presented and compared. It is shown how one of these allows for theoretically infinite constant power speed range. The strategies are also experimentally verified and a 10:1 range is demonstrated.
We propose a new sensorless control method that uses the neutral point voltage from stator windings in this paper. Each inductance of the three phase coils of the Permanent Magnet Synchronous Motor (PMSM) is slightly affected by the rotor magnet flux. As a result, the neutral point voltage also changes depending on the rotor position. The rotor position can be estimated by detecting the neutral point...
This paper proposes a Wound-Rotor Brushless Doubly Fed Induction Machine (WRBDFIM), an alternative Brushless Doubly Fed Induction Machine (BDFIM) concept for wind turbine applications. The WRBDFIM consists of two separate machine winding sets different in pole-numbers, whose rotor windings are connected together. Both of the winding sets are housed in the same machine frame. The separate winding set...
In general, switched reluctance motors (SRMs) are driven by the unipolar current excitation. The conventional drive technique requires simultaneous optimization process for some controlled-parameters: the turn-on angle, turn-off angle, and current chopping level. The difficulty in the current command generation makes the torque controller design complicated. In the previous paper, to give a general...
In this paper, a novel method for predicting the torque-speed characteristics of salient-pole synchronous machines (SPSM) is presented. These characteristics are commonly used as the basis for evaluating drives with variable operating ranges, e.g. traction drives for electric and hybrid electric vehicles. Such vehicles are often powered by permanent magnet synchronous machines (PMSM) which contain...
The paper focuses on the synchronous reluctance machine rotor design. The rotor's shape in this machine should maximize the flux passing in the d axis while minimizing the flux in its q axis. This can be achieved by designing the rotor to respect the natural flow of the flux in the d axis in order to reduce the magnetic resistance while increasing the insulation in the q axis. The proposed design...
A flux-weakening predictive control algorithm (FWPC) is proposed in this paper with the aim of extending Constant-Power Speed Range (CPSR) of Surface-Mounted Permanent Magnet Synchronous Machines (SPMs). The proposed FWPC is developed on the basis of an accurate SPM sampled-data model and consists of appropriately exploiting the DC-link voltage reserve that is generally set aside for dynamic purpose...
Sensorless field oriented control has always been an area of study with many insecurities, parameter sensitivities and instabilities. In this paper, after giving a short overview of standard sensorless field oriented control algorithms, a new technology by Texas Instruments called “InstaSPIN” will be evaluated. InstaSPIN promises to solve all of the well-known problems of sensorless control as, weak...
This paper first extend the Fundamental PWM Excitation (FPE) sensorless control technique on Interior Permanent Magnet Synchronous Machine (IPMSM) and investigates the torque control bandwidth of three sensorless control schemes for Direct Torque and Flux Control (DTFC) for IPMSMs, including High Frequency (HF) Injection, Adaptive Sliding Mode Observer (SMO) and FPE. Through the frequency response...
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.