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it consist of a permanent magnet as stator and a low resistance solid metalic cylinder as rotor, which drives the pointer and scale arrangement. the rotor is also connected to shaft which has a provition to get contact with the rotating machines,whose rpm has to be measured. when it get contact to a rotating machine the shaft rotates which eventually rotates the metalic cylinder in strong magnetic field , its known that when a low resistant metal rotated in a strong magnetic field eddy current gets induced in the low resistance metal opposing the cause of action which held the pointer in equilibrium position showing some reading which will be caliberated for the corresponding speeds hence it shows the correct rpm in which the machine rotates
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What type of current must be used with a transformer?
DC current cannot be used in a transformer only AC will work. A transformer needs the continual build and collapse of the magnetic field to keep the iron core from reaching saturation. Only alternating current will transfer power through a transformer.
What is unidirectional current controller device?
A unidirectional current controller device is a type of electrical on/off switch. In order for an item to work that is plugged into a particular outlet, the switch must be in the on position. It is like having lamps plugged into outlets that are controlled by only one switch.
Why are motor armatures laminated?
Motor armatures have to be made of thin laminations of iron to work efficiently.A plain solid iron armature would waste a lot of energy in at least two ways:the magnetic field that is produced by the motor's stator would induce strong eddy currents in the solid armature and as a result the armature would get unnecessarily hotthose same eddy currents would counteract the magnetic field of the stator so that extra energy would have to be supplied to the motor to make it drive its intended load.By using an armature made of very thin iron laminations, the eddy currents can be reduced to an acceptable minimum level, thus avoiding unnecessary overheating of the motor and allowing it operate using the lowest possible supply of current to drive its intended load.
How does a ct work?
As current flows through a conductor (wire) an electromagnetic field is produced. A CT is just a coil of wire that surrounds the conductor with the current flow. The EMF produced induces a voltage in the CT and that is sensed by some type of device to determine the amount of current in the primary conductor. Usually used when a large current is fed through the primary and you want to know what that is without measuring it directly. ADDITIONAL: THE MOST NEGLECTED ANSWER SPECIALLY IN DEFINING THE PURPOSE AND USE OF INSTRUMENT TRANSFORMERS (CURRENT AND POTENTIAL OR VOLTAGE TRANSFORMER) IS PROTECTION.
How do you rewire a 220V lamp to work on 110V?
The quick answer is you don't. Normally a 220 V fixture would be in a commercial location. Since Voltage = Current x Resistance the current for the 220 V case would be 220/R. Since R won't change your new current would be 110/R. Depending on the lamp type, the lower current will make the bulb dim or it won't light at all. Always use the proper voltage for a device to avoid dangerous situations.
How do train brakes work?
Eddy current.(based on the concept of magnetization and demagnetization)
Can eddy current work through galvanization?
as far as i know eddy currents will work on any material as long as the material to be tested is conductive...and it also depends on the penetration to where its being applied
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Which type of current does a transformer work with?
AC (alternating current)
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it sure would work.. behind the dashboard are plugs for each function. one for tachometer, one for speedometer, fuel, water temp. ect.. if your new dash doesn't have a tachometer it will not interfere with the speedomet aspect of it. but you will not have a tach obviously. that sucks kid
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Transrapid Maglevs slow down and stop using a combination of electromagnetic brakes and eddy-current brakes. Electromagnetic brakes work by applying a magnetic field to the track, which induces a current in the moving magnets of the train, creating a force that opposes the motion. Eddy-current brakes work by creating a magnetic field that interacts with the conducting track, generating eddy currents which create an opposite magnetic field that slows down the train. These braking systems work together to gradually slow down and bring the Transrapid Maglev to a stop.
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My tachometer only works about once per year. How do you check for loose connections on the tachometer in a 99 Honda Civic Si?
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