Sensorless Speed Control Scheme for Induction Motor Drive Using DC link Measurements
Journal Title: International Journal of Science Engineering and Advance Technology - Year 2014, Vol 2, Issue 1
Abstract
The controlled induction motor drives without mechanical speed sensors at the motor shaft have the attractions of low cost and high reliability. To replace the sensor, the information on the rotor speed is extracted from measured stator voltages and currents at the motor terminals. Vector controlled drives requires estimating the magnitude and spatial orientation of the fundamental magnetic flux waves in the stator or in the rotor. Open loop estimators or closed loop observers are used for this purpose. They differ with respect to accuracy, robustness and sensitivity against model parameter variations. This paper presents a new control strategy for three-phase induction motor which includes independent speed &torque control loops and the current regulation thereby overcoming the limitation (i.e. sluggish response) of volts per hertz controlled industrial drives. For closed-loop control, the feedback signals including the rotor speed, flux and torque are not measured directly but are estimated by means of an algorithm. The inputs to this algorithm are the reconstructed waveforms of stator currents and voltages obtained from the dc link and not measured directly on stator side. The proposed drive thus requires only one sensor in the dc link to implement the close-loop speed and torque control of a threephase induction motor.
Authors and Affiliations
Yesupadam C| Pursuing M.Tech in the field of Power & Industrial Drives, Sk Gouse Basha| Working as, Assistant Professor in the EEE Department, NCET, Vijayawada, Ravi Kumar Reddy P| Working as, PPC In-charge in Transformers manufacturing Industry, AP, India
Keywords
Related Articles
- EP ID EP16256
- DOI -
- Views 362
- Downloads 20
Controller Implementation for PV Interconnection Based ThreePhase UPS Systems Operating Under Highly Nonlinear Loads
This paper presents the design of a PV interconnection system based three-phase uninterruptible power supply (UPS) systems that are operating under highly nonlinear loads. The classical high-performance sinusoidal pu...
Fusing Local Patterns Of Gabor Magnitue For Recognition System
Face recognition is a process of analyzing (or) comparing face with the previously stored face images. Training phase involves the collection of images and checking it for the presence of noise. A testing phase is a...
Power Quality Improvement In Distribution Systems Using Facts Devices
The quality of available supply power has a direct economic impact on industrial and domestic sectors which affects the growth of any nation.This paper proposes an algorithm to produce reference voltage for a distrib...
Twitter has drew a large number of users to share and disperse most onward data, bringing about large volumes of information produced systematic. In any case, various applications in Information Retrieval (IR) and Na...
Huddling For Anonymization Of Compacted And Disseminated Public Systems
Social network: a social structure consists of nodes and ties. Noes are the individual actors within the networks May be different kinds May have attributes, labels or classes Ties are the relationships between the a...