The dc motor was the mainstay of electric traction drives on both electric and diesel electric locomotives street carstrams and diesel electric drilling rigs for many years. In a typical dc motor there are permanent magnets on the outside and a spinning armature on the inside.
Dc Motor Speed Control Variable Speed Motor Controls And
Dc electric motor diagram. Inside an electric motor these attracting and repelling forces create rotational motion. Modern dc motors are nearly always operated in conjunction with power. The armature contains an electromagnetwhen you run electricity into this electromagnet it creates a. The armature or rotor is an electromagnet while the field magnet is a permanent magnet the field magnet could be an electromagnet as well but in most small motors it isnt in order to save. An automatic starter operates in a similar fashion except that automatic relays short out sections of the starter resistance either by a time sequence or when the armature current drops to a selected value. A dc motor is an electric motor that runs on direct current dc electricitydc motors were used to run machinery often eliminating the need for a local steam engine or internal combustion enginedc motors can operate directly from rechargeable batteries providing the motive power for the first electric vehicles.
The permanent magnets are stationary so they are called the statorthe armature rotates so it is called the rotor. A brushed dc electric motor is an internally commutated electric motor designed to be run from a direct current power source. Figure 4 shows the automatic dc starter circuit diagram. The article how electric motors work explains how brushed motors work. Four point manual dc motor starter circuit diagram. The introduction of dc motors and an electrical grid system to run machinery starting in the 1870s started a new second industrial revolution.
Brushed motors were the first commercially important application of electric power to driving mechanical energy and dc distribution systems were used for more than 100 years to operate motors in commercial and industrial buildings. In the above diagram you can see two magnets in the motor.
Gallery of Dc Electric Motor Diagram
