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Would you recommend using a 50 hp induction motor to drive a 10hp load Explain your answer?
Wiki User
∙ 15y ago
hey hopefully this is for jainkos ~ hahahah. This is from my general knowledge and some bits from the text...It would work but its not practical. too much current would be used and wasted. The efficency would be very low.
Wiki User
∙ 15y ago
Anonymous
yes
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Why is a 3 phase induction motor is used in electric trains?
AC induction motors are not always used in trains as traction engines, however they are a popular choice. AC induction motors are very simple and reliable and aside from bearing wear they have no parts that wear out. This is because the power used by the rotating parts is supplied by the magnetism like in a transformer and so there are no slipping brushes. Most train systems actually use a DC supply, then a device called an inverter is used to convert the DC to variable frequency to drive the AC motor and control its speed. When this is done the AC induction motor is a very reliable and flexible engine and even allows energy recovery when the train is breaking.
What method can be used to control the speed of rotation of a 3 phase induction motor?
USE VARIABLE SPEED DRIVE (VSD) OR ALSO CALLED VARIABLE FREQUENCY DRIVE (VFD). THE PRINCIPLE IS TO VARY OR CHANGE THE FREQUENCY WITHOUT AFFECTING THE VOLTAGE. THIS IS ONE SOLUTION TO ENERGY MANAGEMENT AND COMBINED TO BUILDING AUTOMATION SYSTEM OR BUILDING MANAGEMENT SYSTEM.
Speed control of three phase induction motor by supply voltage control using AC voltage regulators?
No. Use standard utility AC, 3 PH voltage to feed a Variable Frequency Drive (VFD). The VFD is then wired to the motor. The output of the VFD varies average voltage and frequency in a semi-constant proportion to keep Volts/Hertz ratio the same to the motor. The operator can then adjust or select the desired speed from the VFD and the VFD will run the motor continuosly at that desired speed. If you were to control only voltage to the motor without adjusting frequency in proportion, the motor would burn up.
Is there a pumping system which variable speed drive is not recommended?
Most centrifugal chillers require a constant water flow, therefore a VFD would not be of any use.
How does a frequency drive work?
Frequency drives are an adjustable-speed drive used for electro-mechanical drive systems. They control the motor speed and torque by varying motor input frequency and voltage.
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