17-08-2016, 08:05 PM
Sir i want a ppt in modren speed control technologies of Ac motors
17-08-2016, 08:05 PM
Sir i want a ppt in modren speed control technologies of Ac motors
18-08-2016, 02:19 PM
Abstract
The electric drive systems used in industrial applications are increasingly required to meet the higher performance and reliability requirement. Today about 90% of all industrial motor applications use three phase induction motors because they are simple in design, easy to maintain, and are less costly than other designs. The paper is depend upon the batching system which is one application of weaving machine which rolls the cloth with specific tension so that it should neither slacken the cloth nor tightened it by replacing DC system with the AC system.. The motion of this loom is controlled by induction motor where in the AC drive is used to run the induction motor which rotates the drum through pulleys.
25-02-2017, 07:25 PM
25-02-2017, 07:47 PM
27-02-2017, 11:49 AM
Various types of speed control methods For the single-phase induction motor. This investigation Paper explains the speed control of the single-phase induction motor by Means of frequency, its application and test result also The power conversion section in the given speed unit consists of IRF840 N-channel MOSFET as switching element. These MOSFET (four in number) are used in H-bridge Form inverter to supply a.c. Current to motor. Driver For this bridge inverter H is composed of transistors C124 And MJE 13002 transistors. The bridge inverter H is supplied with 300v power supply and for the driver and the frequency control circuit, A 12V power supply is supplied. Here, IC SG3525A is used as pulse Width modulation IC for frequency control purpose. So, Built-in frequency range is 16 to 57 Hz to constant To change the speed of the induction motor.
Reference : http://www.ijctee.org/files/VOLUME2ISSUE...012_07.pdf
21-03-2017, 04:38 PM
23-03-2017, 09:18 AM
Several types of speed control methods are described for the single-phase induction motor. This research work explains the speed control of the single-phase induction motor by means of the frequency, its implementation and the test result also the section of power conversion in the given speed variator consists of N-channel MOSFET IRF840 as element Of switching. These MOSFETs (four in number) are used in bridge configuration H to form an inverter to supply a.c. Current to motor. The control circuit for this bridge inverter H is formed by transistors C124 and transistors MJE 13002. The bridge inverter H is supplied with a 300v power supply and for the controller and the frequency control circuit, a source 12V power supply. Here, IC SG3525A is used as pulse width modulation IC for the purpose of frequency control. Therefore, the system built the frequency range is 16 to 57 Hz at constant voltage to change the speed of the induction motor. Induction motors are widely used in many residential, industrial, commercial and utility applications. Single-phase induction motors are widely used in home appliances and industrial control. A Variable Frequency Drive (VFD) is a system for controlling the speed of a rotational or linear alternating current (AC) electric motor by controlling the frequency of the electric power supplied to the motor. A frequency inverter is a specific type of adjustable speed drive. Variable frequency drives are also known as frequency adjustable drives (AFDs), variable speed drives (VSDs), AC drives, micro-drives or drives . Multi-speed operation and multi-purpose operation are provided by controlling the speed of these motors. In previous days, variable speed drives had several limitations, such as increased space, poor efficiencies, slower speed, and so on. But, the invention of electronic power devices changes the situation so that now, the drive is built in a smaller size, and high reliability.
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