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Induction motors are the workhorse of modern industry. Three-phase induction motors are the most common and frequently encountered machines in industry because of their simple design, rugged, low-price, easy maintenance and wide range of power ratings ranging from fractional horsepower to 10 MW. A low cost technique based on principle of motion is presented here to measure torque against speed of...
Three-phase induction motor due to simple structure, reliable operation, as well as the advantages of low cost is widely used in industrial, agricultural production and the areas of daily life. However, induction motors starting directly have great impacts on the power grid and electrical equipment. There are different performance requirements in different applications, and increasing emphasis on...
The IM has been adopted widely as the driving sources of the industrial machine and the plants. That reason is that IM is robust and easy to drive. A typical line-start drive system is a motor operated valve arranged to the power plants, the chemical plants. These valves are used for application that energy supply is shut down in an emergency. So, the IM which makes valve operate is connected to 3-phase...
This paper studies measurement uncertainty propagation and parameter sensitivity based on a torque-estimation model for induction machines. The model is based on the equation that describes the interaction of rotor flux and rotor currents. Contrary to classical schemes for induction motor control, this is an open-loop scheme; however, the model still requires different machine parameters. Therefore,...
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