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Why should we add the external resistance in rotor of induction motor?
Adding external resistance to the rotor of an induction motor can improve its starting performance and control characteristics. It increases the rotor resistance, which enhances torque at lower speeds and helps in reducing inrush current during startup. Additionally, it allows for better slip control, enabling efficient operation across varying load conditions and improving overall motor performance. This is particularly useful in applications requiring high starting torque or variable speed control.
When the length of air gap is increased in an induction motor what will also increase?
Power factor reduces overload capacity increased noise reduces
What should the value of the resistance box for a 5 hp slipring induction motor?
its depends upon rotor voltage and current
How do you increase starting torque in cage type 3-phase induction motor's?
by adding external resistance to the shaft of rotor
What is induction heating?
Induction heating is the process of heating an electrically conducting object (usually a metal) by electromagnetic induction, where eddy currents are generated within the metal and resistance leads to Joule heating of the metal.induction heater including high frequency induction heating machine and middle frequencey heating machine. Induction heating applications for an induction furnace include induction welding, induction brazing, induction hardening, induction melting, quenching, forging, soldening, induction annealing and other forms of heat treatment. Induction heating is often used to heat graphite crucibles (containing other materials) and is used extensively in the semiconductor industry for the heating of silicon and other semiconductors. Induction heating can produce high power densities which allow short interaction times to reach the required temperature. That translates into lots of energy transferred into a material right now, with a very rapid rise in temperature.
Voltage is divided by?
The most common equation involving voltage is Ohm's Law, which, when provided with two of Voltage, Induction or Resistance, can produce the third value. In short, voltage is calculated by multiplying induction (amperage) by resistance. Conversely, dividing voltage by induction results in resistance, and dividing voltage by resistance results in induction. More information on Ohm's Law is available at https://en.wikipedia.org/wiki/Ohm%27s_law, and http://www.csgnetwork.com/ohmslaw.html has utilities (scripting must be enabled) to automatically do the "work" for you.
Why are the ac series motors preferred for electric traction?
ac motor is nothing but induction motor.So check out for characteristics of induction motors.
What are the reasons for connecting resistance in the rotor circuit when starting wound rotor induction motors?
To limit the starting current in slip ring induction motors.
Why speed of the induction motor falls when load is increased?
As the load increases, the speed reduces to deliver the increased torque required.
Why should we add the external resistance in rotor of induction motor?
Adding external resistance to the rotor of an induction motor can improve its starting performance and control characteristics. It increases the rotor resistance, which enhances torque at lower speeds and helps in reducing inrush current during startup. Additionally, it allows for better slip control, enabling efficient operation across varying load conditions and improving overall motor performance. This is particularly useful in applications requiring high starting torque or variable speed control.
Why using on motor star delta starter?
because at the starting the induction motor drawn a heavy current thats why we use starter to increase the starting resistance of the induction motor!
When the length of air gap is increased in an induction motor what will also increase?
Power factor reduces overload capacity increased noise reduces
What are the different types of induction motors?
DOL(Direct Online starting) Star Delta starting Auto transformer starting Above methods are for squirrel cage induction motor Rotor resistance starting is used for wound rotor or slip ring induction motor
What should the value of the resistance box for a 5 hp slipring induction motor?
its depends upon rotor voltage and current
How do you increase starting torque in cage type 3-phase induction motor's?
by adding external resistance to the shaft of rotor
What has the author Aroon Yusuf written?
Aroon Yusuf has written: 'Induction of resistance to the mitoinhibitory effects of orotic acid during hepatocarcinogenesis'
What is induction heating?
Induction heating is the process of heating an electrically conducting object (usually a metal) by electromagnetic induction, where eddy currents are generated within the metal and resistance leads to Joule heating of the metal.induction heater including high frequency induction heating machine and middle frequencey heating machine. Induction heating applications for an induction furnace include induction welding, induction brazing, induction hardening, induction melting, quenching, forging, soldening, induction annealing and other forms of heat treatment. Induction heating is often used to heat graphite crucibles (containing other materials) and is used extensively in the semiconductor industry for the heating of silicon and other semiconductors. Induction heating can produce high power densities which allow short interaction times to reach the required temperature. That translates into lots of energy transferred into a material right now, with a very rapid rise in temperature.
