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How to Understand Variable Frequency Drives
by Lin Lin SEO
How to Understand Variable Frequency Drives?
Variable frequency drives are used in a variety of contexts where the speed of an electrically powered motor needs to be changed. One example is in heating and cooling systems. Variable frequency drives give the user the ability to change the motor's speed, so he can adjust the system to his comfort level. The basic functions on which these drives work are the magnetic fields generated by electricity and the adjustable nature of electrical frequency. Dreambox dm 8000
Instructions
Instructions
1
Look at the rotor in terms of magnetism. The rotor's movement is caused by electricity flowing through it, creating a magnetic field with the north and south poles on either side of it. This magnet is called the stator.
2
Look at the stator's movement in relation to the rotor's movement. As the stator moves, it magnetizes the rotor, which "chases" the stator due to this magnetism. However, it will never catch it since there is more charge in the stator than there is in the rotor. It's like a donkey with a carrot mounted directly in front of it. It will continue to walk forward, but it will never catch the carrot because the donkey's location is directly connected to the carrot's location.
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Look at the factors that affect motor speed: the amount of poles in the magnet and the frequency of the magnet's movement. The former can only be changed by opening up the motor and poking around in it; the latter, however, can be changed by adjusting the electrical power that goes to it. Dreambox dm800
4
Isolate the frequency of the electrical charges. This is how a variable frequency drive works: By adjusting the frequency, it can adjust the speed of the motor by changing the rotor's level of magnetism.
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About Lin Lin 
SEO
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