Introduction:
A DC motor is an electrical machine that converts electrical energy into mechanical energy. DC motors vary in their types they can be electromechanical or electronic.
These motors can be powered from direct lighting power distribution systems.
Lightweight DC motors are used as portable power tools, large DC motors are used for propulsion of electric vehicles and the like.
The working of the motor is based on the interaction between the magnetic field and the current to produce a force.
The phenomenon behind this motor is Faraday’s Law of conservation of electrical and mechanical energy.
Materials required:
- Battery
- Magnets
- Wire
- Safety pins
- Knife
- Copper wire
You use the resource/tools page section to find the tips where you can buy these materials used at a reasonable cost.
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Questions and Answers:
- What is a DC motor and what are its parts?
A DC motor is an electrical machine that converts electrical energy into mechanical energy.
When the electric current passes through a coil in a magnetic field a magnetic force is generated and this produces a torque in the DC motor.
It contains rotor, stater, air gap, winding and a commutator.
- What are the advantages of DC motors?
The speed can be easily controlled over a wide range. The dimensions of the DC motor allow space saving.
Quick acceleration is possible with these motors. It has 85 to 90% efficiency. There are no harmonic effects on a DC motor.
Quick stopping and starting are possible. It has accurate steep less speed with constant torque.
- What are the disadvantages of DC motors?
The motor produces a low-pressure environment which is why it cannot be used as artificial hearts. AC motors are cheaper than DC motors.
It cannot be used in hazardous conditions due to sparkling at the brush.
- What are the types of DC motors?
There are 4 types of DC motors. They are:
- Geared DC motors
- Series DC motors
- Shunt DC motors
- Compound DC motors
- State the applications of DC motors.
Series motors are known to produce a large amount of turning power, the torque from its idol state.
These motors can be used because of this characteristic in small electrical appliances and versatile electrical equipment.
Shunt DC motors are helpful for belt-driven applications, thanks to its constant speed it is used in applications like industrial and automotive applications such as winding and unwinding machines.
Geared DC motors are as oil skimmers, CNC machines, and automatic sorting machines. Compound DC motors are used in daily applications and industrial machines.
Conclusion:
The video instructs the viewer on how to make a DC motor using easily available materials. It shows the working of a DC model at a small scale.