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A three-phase induction motor emulator based on a bidirectional six-switch bridge-type power electronic converter is demonstrated. Two current control techniques in the abc-natural reference frame based on pulse-width modulation and hysteresis current control switching techniques are used and compared. The dynamic responses of the three-phase induction motor emulator during direct on-line start-up...
In this paper, the effect of variation of angle between the magnetic field axes of armature field and PM rotor field on armature reaction and performance of a Hybrid Permanent Magnet Induction Machine (PMIM) is presented. The variation of resultant air gap flux density and torque-slip characteristics of the machine for different angle between the magnetic field axes were obtained using Finite Element...
Switched reluctance motors, due to their simple constructions, are drawing the attentions for industrial applications. It is superior to other electrical machines because of less manufacturing cost, reduced losses and greater reliability. But these machines have a severe drawback that they have large torque ripples which make the operation noisy and increase the wear and tear in the SRM drive. The...
A dual-rotor Hybrid Permanent Magnet Induction Machine (PMIM) having high torque and high power capability and possessing the advantages of both PM synchronous and induction machines can be a suitable option for electric vehicle application. This paper deals with the performance analysis of various possible topologies of PMIM and a conventional Squirrel Cage Induction Machine (SCIM) along with their...
Volts-per-hertz (V/f) controlled induction motor drive connected with LC filter may experience small-signal instabilities in different operating conditions and creates sustained oscillations in motor current, inverter current, motor voltage, developed torque and speed of the motor. This paper investigates the small signal instabilities of the drive at different speeds and load torques. This paper...
PTC is a kind of finite control set model predictive control (FCS-MPC) technique gaining its attention in high-performance electric drive applications due to its intuitive concepts and simple structure. Further, additional control parameters (switching frequency, common mode voltage etc.) can be directly included into the objective-function of the control algorithm. However, suitable weighting factors...
Predictive torque control (PTC) is a kind of finite control set model predictive control (FCSMPC) technique and this method is one of the widely used modern control techniques for induction motor drives. This control method becomes popular due to its simple structure, fast dynamic response and ability to include additional constraints (control parameters) into the objective function of the control...
In this paper a novel three stage control for squirrel cage induction generator (SCIG) fed to standalone system through back to back converter is presented. In the proposed technique dc bus voltage controller is implemented to regulate the output voltage of the stand alone system. The voltage controller is generating the speed command of the speed controller followed by inner current controller. The...
In this paper, a Square root Cubature Kalman filter (SCKF) is applied for speed and position estimation in the control of Interior Permanent Magnet Synchronous Motor (IPMSM). Cubature Kalman filter avoids the linearization errors prevailing in the Extended Kalman filter algorithm, and is much easier to tune than the Unscented Kalman filter. The square root version of the Cubature Kalman filter gives...
The major disadvantage of Switched Reluctance Motors (SRMs) is their high torque ripples which limits their suitability to high performance Adjustable Speed Motor Drive (ASMD) applications. Various Instantaneous Torque Control (ITC) schemes have been developed to mitigate the SRM torque ripples. Among them, Torque Sharing Function (TSF) is a popular torque control method. Various conventional offline...
The aim of this paper is to compare performances of brushless DC (BLDC) motor on two different inverter control strategies. Sinusoidal and square wave are individually applied to the motor and characteristics are studied. A prototype inverter fed BLDC motor drive is designed and developed. DSP dsPIC30F3011 along with MPLAB IDE software is used for generation of firing pulses for each type of inverter...
In this paper, direct torque control scheme using space vector approach is implemented on an open-end winding induction motor. The three-level inverter is used to drive the motor by feeding two two-level inverter from both open ends of the motor. A three-level inverter drive will provide more number of voltage space vectors, thereby reducing the torque ripple compared to a two-level DTC scheme. The...
Wide torque-speed range and high reliability are the primary need of the traction motor in electric vehicles. Switched Reluctance machine (SRM) offers numerous advantages such as simple and robust construction, high speed and high durability, low cost, and fault tolerance control capabilities, high reliability as each phase works independently. In view of this, the paper describes the design methodology...
Brushless direct current motor finds its applications in electric propulsion due to its reliability, reduced electromagnetic interference and improved life cycle cost. Rotor position sensing with sensorless techniques exhibit better performance with varying temperature and humidity conditions as well as continual motion of the vessels and also overthrow the use of hall sensors. A control technique...
Dynamic performance of a brushless DC motor is greatly influenced by a controller and the controller design relies on average-value models, which are vital in small signal and large signal analysis of electromechanical systems. Average-value model (AVM) of a brushless DC motor can be constructed by averaging motor variables or by exploring its resemblance to a DC motor. AVM can also be constructed...
This paper presents proportional integral direct torque control (PIDTC) and fuzzy-2 DTC (F2DTC) of the induction motor (IM) drive using space vector modulation (SVM) for five-level diode clamped inverter (FDCI). The above control schemes have been implemented in the laboratory using 2HP IM through a DSPACE DS-1104 controller. The dc-link capacitor voltages of FDCI are balanced in both the control...
This paper proposes a grid interactive bidirectional solar water pumping system using a three phase induction motor drive (IMD). A single phase voltage source converter (VSC) is used to direct the flow of power from grid supply to the pump and back to the grid from SPV array. A boost converter is used for the maximum power point tracking (MPPT) of the SPV array. A smart power sharing control is proposed,...
In this paper, a permanent magnet synchronous generator (PMSG) is emulated using power hardware in-the-loop (PHIL). This emulation scheme provides a method to eliminate risks and costs associated with the testing, prototyping and validation of control structures and power converter topologies that form parts of a motor drive system. The proposed implementation scheme can be used to test drives for...
This paper presents a novel topology of dual rotor radial flux-BLDC motor with Halbach array magnets as an efficient solution for drives. Energy efficient motors are the need of day for electric vehicles, industrial and consumer products. Especially this concept is arrived to cater for the requirements of electrical vehicle. Due to advent of high permeability, high saturation magnetic materials, high...
Microstepping drive for stepper motor is a well-known technique to improve stepper motor performance. Normally microstepping is carried at fixed pulse width planned. But this method is suitable only when motors are driven at fixed pre-defined speeds for non-real time applications. The problem discussed in this paper considers an application where motors need to track a given reference position profile...
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