Hello, friends, I hope you all are doing great. In today’s tutorial, we will discuss the Difference Between Moving Iron & Moving Coil Instrument. The basic difference between moving coil and moving iron instruments is that soft iron is used to calculate different values in moving iron devices. In moving coil devices, a conductive coil is used to find the value of DC.
In today’s post, we will look at both moving coil and moving iron devices with the details and compare them to find their differences. So let’s get started with the Difference Between Moving Iron & Moving Coil instruments.
Difference Between Moving Iron & Moving Coil Instrument
Moving Iron Instrument
- The device that used soft iron to find the moving process is called a moving iron device.
- Its working operation is based on the phenomena of electromagnetic induction
- These instruments can be used to find the values of both AC and DC.
- The accuracy offered by these modules is less.
- The deflection of moving devices is directly proportional to the current.
- In these devices, there is no occurrence of hysteresis loss.
- These modules can be operated like the ammeter, voltmeter, and wattmeter.
- The scale used by them is non-uniform.
- In these devices, air friction damping occurs.
- These devices used large power.
- Its torque is controlled with the use of a spring.
- Deflection is direct to the square of the current
- It has air friction damping
Moving Coil Instrument
- Such devices that used a conductive coil to measure the values of current and voltage are called moving coil instruments.
- Its torque can also control with the spring.
- The deflection of these devices is directly proportional to the square of the current flowing.
- In these modules, hysteresis losses occur.
- Their deflection has a direct relation to the current.
- It has damping for eddy current
- These devices can operate as voltmeters, ammeters, galvanometers, and ohmmeters.
- Their working operation is like the operation dc motor.
- These devices are used to find the values of direct current.
- They provide high accuracy.
- Their scale is uniform.
- In these devices, eddy current damping occurs.
Moving Iron Vs Moving Coil Instrument
Moving Coil Instrument
- It is a measuring device that has a movement of coil in the field produced by a permanent magnet for measuring current or voltage known as a moving coil instrument
- The working of moving coil is on factor that current carrying coil faces force that causes it motion when put in magnetic field of maent.
- The moving coil instruments come with a reading scale.
- It measures DC only
- It provides high accuracy
- The use of a moving coil and stationary magnetic field make it complex and structured
- The deflection of the pointer is directly proportional to the current in coil θ ∝ I.
- It provides eddy current damping
- Its working range is 10 μA to 100 mA.
- It uses less power
- It does not have hysteresis losses and are low-cost device
Moving Iron Instrument
- The device has a core of soft iron that moves in the field for an electromagnet to find the value of current and voltage.
- Its working follows the phenomena of magnetism where a magnetic field has an attraction for magnetic materials.
- It comes with non-uniform scale that is cramped at the start point
- It measures dc and ac
- deflection of the pointer is proportional to the square of current, i.e. θ ∝ I2.
- It has less accuracy than moving coil-controlling torque is the result of either gravity control or spring control.
- It has electromagnet
- It uses high power and the measuring range is 10 mA to 100 A.
- It has hysteresis loss and low-cost device
FAQS
What are the advantages of moving iron instrument over moving coil instrument?
- It is a universal device that used to measures AC and DC values
- It has features to handle heavy loads and is not affected in high loading conditions.
- Its structure makes it low cost than moving coil instruments
What are the disadvantages of moving coil instrument?
- It is only used for measuring DC
- It is a higher cost than moving iron
- Easily damaged
What are the advantages of moving coil?
- It has high sensitivity.
- It provides flexible and high-accuracy values.
- It does not have a high effect on stray magnetic fields.
Is a moving coil instrument AC or DC?
- Moving coil instruments are used for measuring DC values, that why moving coil ammeters used for measuring DC and moving iron have features for measuring both AC and DC quantities
What is the difference between a moving coil and a moving magnet?
- The moving magent cartridge comes with static coils and moving magent. The moving coil cartridge comes with magent that is still when coils vibrate. Moving coil cartridges are less weight than moving magnet cartridges. It is complicated and has difficult maintenance.
That is all about the difference between moving the iron and moving coil devices. I tried my level best to make it simple for you. If you have any further queries ask in the comments. Thanks for reading.