What are the advantages and disadvantages of DC machines?

What are the advantages and disadvantages of DC machines?

Advantages and Disadvantages of DC Motors

  • They are suitable for low-speed torque.
  • They have adjustable speed.
  • They offer a wide range of speed control both below and above the rated speed.
  • They have a very high and strong starting torque.

Why are DC motors so expensive?

The heavier rotor of the DC motor may require more expensive bearings. The rotor design is probably the most important factor in making the DC motor more expensive. If the DC motor stator has permanent magnets, that could make it more expensive or not depending on the magnet material.

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Why not use DC current in our homes?

Direct current is not used at home because for the same value of the voltage, DC is more lethal than AC since direct current does not go through zero. Electrolytic corrosion is more an issue with direct current. DC inductors are more complicated. It requires commutators, electronic switches and brushes.

What motor is better AC or DC?

AC motors are generally considered to be more powerful than DC motors because they can generate higher torque by using a more powerful current. However, DC motors are typically more efficient and make better use of their input energy.

What are the disadvantages of a shunt motor?

Shunt motor is a constant speed motor, it would be disadvantages where it’s necessary to operate under variable speed. For the same current input, its starting torque is not a high as that of a DC series motor.

When does DC shunt motor need to be loaded?

With the increase in the load speed of the machine decreases, DC shunt motor maintains almost constant speed from no load to full load. With decrease in the speed torque of the dc series motor drops sharply. DC series motor should always require being loaded before starting the motor.

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Which is better shunt or series wound motor?

Apart from the advantages and disadvantages of DC Motors of Series, Shunt and Compound configuration, Applications of such Motors are also included in here. Series wound motors can use for AC or DC supply so it’s also known as universal motors. Compare with Shunt Motor DC series motor develop more power for the same construction size.

What are the disadvantages of DC series motors?

Disadvantages of DC Series Motors: Speed control and regulation of DC series motor are not good. It is necessary to have a load before starting the DC series motors. So Dc Series motors are not good to use where load does not apply to the initial stage.