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.
Current-Controlled Pulse Width Modulated (CCPWM) Voltage Source Inverters (VSIs) receive an extensive coverage in high performance drives because of the sovereign dynamic feedback and essential over-current protection, juxtaposed with the voltage-Controlled PWM (VC-PWM) VSIs. Here a new Current Error Space Vector (CESV)based constant switching frequency hysteresis controller which get rid of the boundary...
This paper proposes a neuro-fuzzy controlled three-zone hybrid space vector pulse width modulation (HSVPWM) method for a two-level voltage source inverter (VSI) fed induction motor. The three-zone HSVPWM improves the performance of induction motor compared to popular literature reported methods. Hence a pre-learned neuro-fuzzy controller (NFC) based HSVPWM is designed to directly obtain three phase...
This paper proposes a method to enhance the power quality of the medium voltage multilevel inverter based induction motor drive system. An 18-pulse AC-DC converter is used to feed a 27-level inverter based vector controlled induction motor drive (VCIMD). Using this configuration, the input supply current distortion decreases to meet the demand of an IEEE-519 standard. The distortion in the 27-level...
In this paper, the simulation of dynamic model of Linear induction Motor (LIM) using Model predictive control (MPC) is presented. Various control methods have been previously proposed for the control of three phase two level inverter. A Model Predictive Control method is a simple and powerful control scheme used for the control of voltage of a three-phase inverter. A discrete time model of the inverter,...
Modular multilevel converter (MMC) is now the state-of-the-art converter topology for high power applications. MMC topology has been commercially introduced in high-voltage dc transmission (HVDC) converter systems as well as medium-voltage (MV) industrial AC drives. To limit overall device losses in high power applications, the device switching frequency of power semiconductor devices should be limited...
Direct torque control (DTC) of an induction motor fed by a two-level voltage source inverter (VSI) is a simple scheme that need less computation time, can be implemented without mechanical speed sensors and is insensitive to parameter variations. In principle, the motor terminal voltages and currents are sampled and used to estimate the motor flux and torque. Based on estimates of the flux position...
Medium voltage high power drives require low device switching frequency operation to bring down the dominating device switching losses. However, low device switching frequency operation leads to increase in total harmonic distortion (THD) of machine stator currents. Synchronous optimal pulsewidth modulation (SOP) is an emerging technique for controlling multilevel inverters of medium voltage drives...
Multilevel converters are now popular power electronic converters for medium-voltage high power drives. The switching losses dominate in the high power drives and hence, low device switching frequencies are preferred to improve the overall efficiency of drive system. However, low device switching frequencies leads to increase in total harmonic distortion (THD) of stator currents. One emerging technique...
Variable switching frequency PWM (VSFPWM) control has been adopted in the induction motor drive in recent work. Due to the position-related phase inductance, interior permanent magnet synchronous motors (IPMSM) have the difficulty to adopt VSFPWM. In contrast to using thevenin theory from previous work, this paper applies d-q transformation to IPMSM drives to predict the phase-current ripple and applies...
Power factor correction (PFC) is common in commercial and industrial applications. A need to extend its application increased with the dwindling natural resources used for power generation and also exceeding energy demand, hence more efficient motor systems and power usage are required at the forefront of utility's demand side management system. The aim is to design and build an active PFC using a...
In this paper, the application of adjustable angle ds-qs axis transformation for three-phase current source induction motor drive is proposed. In order to reduce higher switching number caused by ignoring induction motor back-EMF, the ds-qs axis transformation with regulating angle technology is applied to motor drive. Using hysteresis current controller and voltage space vector, the status of switches...
In this paper a Random Pulse Width Modulation (RPWM) scheme for a dual inverter fed 3-level open-end winding induction motor based drive is presented. The proposed scheme is a variable switching frequency technique in which randomization is achieved by sampling the reference space vector at random intervals. Any reference space vector for the 3-level inverter is mapped into a vector of a basic 2-level...
A Pulse Density Modulation scheme based on Space Vector with Vector Quantization for four level inverter is proposed in this paper. The scheme disperses the power spectrum of the inverter output voltage as a wide-spectrum noise. The vector space of inverter reference space vector region is divided into voronoi regions to find out switching vectors. A new method is presented to code these voronoi regions...
Hybrid Electric Vehicle (HEV) is an emerging technology in the modern world because of the fact that it mitigates environmental pollutions and at the same time increases fuel efficiency of the vehicles. Multilevel inverter controls electric drive of HEV of high power and enhances its performance which is the reflection of the fact that it can generate sinusoidal voltages with only fundamental switching...
Since there's a biggish output ripple in current direct torque's control, we design a direct torque control system for three-level inverters used in asynchronous motors by analyzing the operational principle of the diode clamped three-level inverters, and simulation is done as well. Ripples of the torque and the rotational speed of the motor can be deduced effectively, and a stable output and a good...
In this study, the speed control of the vector controlled induction motor was implemented by using hard switching and soft switching inverters. A TMS320F243 digital signal processor was used to implement control algorithm during practical implementation. With the use of the vector control, complex structure of the controller is simplified, and dependence to variations of the motor parameters is reduced...
In this paper, a new PWM technique for induction motor drives involving six concentric dodecagonal space vector structures is proposed. Apart from increasing the linear modulation range compared to a hexagonal space vector structure, the proposed configuration helps in total elimination of 5th and 7th order harmonics from the phase voltage throughout the modulation range. Thus, it is possible to operate...
In high power applications the inverter of a motor drive should have a switching frequency as low as possible in order to reduce the switching and snubber losses. An effective pulse width modulation (PWM) approach that can be utilized successfully with high control accuracy is combination of selective harmonic elimination and pulse width modulation (SHEPWM). This technique offers many advantages other...
A novel dodecagonal space vector structure for induction motor drive is presented in this paper. It consists of two dodecagons, with the radius of the outer one twice the inner one. Compared to existing dodecagonal space vector structures, to achieve the same PWM output voltage quality, the proposed topology lowers the switching frequency of the inverters and reduces the device ratings to half. At...
Component minimized multi-machine drives have recently become an area of much research interest. One such drive comprises two three-phase induction motors supplied by a five-leg voltage source inverter (VSI). With only five legs available to supply two three-phase motors one inverter leg is connected to both motors and the drive is controlled in such a way that both machines can operate independently...
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.