Motor Capacitor Review

A DC motor can be described as a simple electric motor that requires a battery or a DC supply to make them run. Technically speaking it has two magnets which have opposite polarity and an electrical coil which works as an electromagnet. The electromagnetic force of the magnet generates a torque which makes the motor turn. Any motor will have the six basic parts of axle, rotor, stator, commutator, field magnet and brushes. Most of the DC motors use the high-strength magnets to get a powerful external magnetic field.

It is used for a variety of products like the electric razor, electric car window and the remote control cars. Allowing the speed and torque relation to be varied these DC motors found a big industrial application. This property helps us converting the motors into many useful forms. Even the feature speed of the motor can be smoothly controlled down to zero followed by acceleration in the opposite direction without any changes in the power circuit. All the DC motors give a quick response to any changes in the control signals because of having a high ratio of torque to inertia.

These motors can also be placed at places where they are required to momentarily give more times their rated torque. Even in an emergency situation it can supply five times its rated torque without stalling by getting the required power supply. This feature dynamic braking or regenerative braking of the DC motors are used for applications which require quick stops. Different types of motors include Wound field, permanent-magnet and brush less DC motors. The Wound field types can be further classified as shunt-wound, series-wound, and compound-wound DC motors. The motors can also be classified for intermittent or continuous duty.

Selecting the motor for a given application requires consideration of factors like its speed range, Speed variation with torque, reversing, duty cycle, peak torque and the heating. For example if field control is to be used then a higher speed range is required in the motor. Having a simple design, reliability and offering different features can be chosen for different uses. It also has been a fascinating way to study the different effects of the magnetic field among many students.