File Name: dc motor principle and working .zip
Mechanical energy What is an electric motor An electric motor is a device converting electrical energy into mechanical energy usually a torque. Again the controller must know the exact position of the rotor using encoder for precise speed and position control.
Theoretically, the same DC machine can be used as a motor or generator. Therefore, construction of a DC motor is same as that of a DC generator. An electric motor is an electrical machine which converts electrical energy into mechanical energy. The basic working principle of a DC motor is: " whenever a current carrying conductor is placed in a magnetic field, it experiences a mechanical force". Fleming's left hand rule : If we stretch the first finger, second finger and thumb of our left hand to be perpendicular to each other, and the direction of magnetic field is represented by the first finger, direction of the current is represented by the second finger, then the thumb represents direction of the force experienced by the current carrying conductor. Above animation helps in understanding the working principle of a DC motor. When armature windings are connected to a DC supply, an electric current sets up in the winding.
ResearchGate has not been able to resolve any citations for this publication. Speed reduction by means of a gear box results in increased torque. Likewise, if we control a DC motor by means of servomechanism, it would be referred as DC servo motor. The most common types rely on the forces produced by magnetic fields. These types of motors also have two different speed specifications: normal speed and the stall-speed torque specifications.
Premium Membership. Learn from experienced power engineers. DC motors have been used in industrial applications for years. Coupled with a DC drive, DC motors provide very precise control DC motors can be used with conveyors, elevators, extruders, marine applications, material handling, paper, plastics, rubber, steel, and textile applications to name a few. Assembly The basic construction of a DC motor is shown in Figure 1. Standard DC motors are readily available in one of two main forms:.
An electric motor is an electrical machine that converts electrical energy into mechanical energy. Most electric motors operate through the interaction between the motor's magnetic field and electric current in a wire winding to generate force in the form of torque applied on the motor's shaft. Electric motors can be powered by direct current DC sources, such as from batteries, or rectifiers , or by alternating current AC sources, such as a power grid, inverters or electrical generators. An electric generator is mechanically identical to an electric motor, but operates with a reversed flow of power, converting mechanical energy into electrical energy. Electric motors may be classified by considerations such as power source type, internal construction, application and type of motion output. In addition to AC versus DC types, motors may be brushed or brushless , may be of various phase see single-phase , two-phase , or three-phase , and may be either air-cooled or liquid-cooled.
Typically, these motors are deployed in equipment that requires some form of rotary or motion-producing control. Direct current motors are essential components in many electrical engineering projects. DC motors fall into different categories, depending on their construction. The most common types include brushed or brushless, permanent magnet, series, and parallel.
Typically, these motors are deployed in equipment that requires some form of rotary or motion-producing control. Direct current motors are essential components in many electrical engineering projects.
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The conversion of this mechanism is known as the commutator, thus these machines are also named as commutating machines.