Lebanon Amateur Radio

 DC Series Motor

 

When the field coil is linked in series to the armature winding of a DC motor, a larger current flows through it, making DC motors self-excited and termed DC series motors. Electrical energy is converted into mechanical energy by the electromagnetic law in a series DC motor. An output shaft rotates as a consequence of the interaction seen between magnetic force around a current-carrying conductor and an external field.

The construction and components of a series DC motor are fairly similar to those of other brushed DC motors. Rotating electrical devices like this one are made up of components such as the stator, armature, brushes, and field windings. As the field and armature windings are in series, an equal amount of current flows through each of them. Consequently, these motors' field coils are constructed from thick wires that have low resistance and few turns so that they can handle the high current loads.

The electromagnetic principle underlies the operation of a series DC motor, which transforms electric energy into mechanical energy. A power supply connection sits at one end of the armature and field coils in this kind of DC motor. When the voltage is applied, electricity flows from these terminals into the armature and field windings. Low resistance is achieved by using very large conductors in these windings. Because of this, the terminals provide an enormous amount of power for the motor. These high-voltage coils provide a powerful magnetic field that causes the shafts to turn at an enormous rate. The armature is spun by powerful torque, which in turn generates the desired mechanical energy. When it comes to the speed of series DC motors, it's important to note that their armature's speed varies greatly depending on the load, which means that greater loads tend to slow them down, while lesser loads tend to speed them up. Thus, eliminating the load would cause the motor to run at such a high speed that the armature would disintegrate.

The fact that series DC motors are capable of producing a high starting torque and continuing to function correctly even when subjected to severe loads is one of the most significant aspects of these motors. Because of these characteristics, SDC motors are an excellent option for use in industrial settings.

In aircraft, these motors serve both as the starters for the engines and as the power source for raising and lowering the wings and the cowl. They are also able to kick-start the engine of a vehicle, and they are an excellent option for usage in portable electrical equipment, miniature electrical appliances, winches, and hoists. Because of their variable speed, SDC motors are helpful in a wide variety of equipment, including sewing machines, vacuum cleaners,  elevators, and many more. However, series DC motors are not the greatest solution for situations in which maintaining a constant speed is of significant importance. This is because their speed is influenced by the changes in the load. In addition to that, adjusting their rate is not a simple endeavor. Therefore, it is best to go with designs that are already available on the market that are more appropriate.

Typical DC Series Motor

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