They are used in DC motors where speed control is necessary . They are used as portable generators where low power supply is required. They are used in motorcycles as dynamos, in toys such as remote control cars and in appliances such as electric shavers.
Where are AC and DC generator used?
Typically, AC generators power home electrical appliances and small motors such as juicers, vacuum cleaners, and food mixers. However, DC generators are used to power large electric motors such as those used in subway systems.
What is an example of a DC generator?
The alternator in a car (i.e., the DC generator which recharges the battery) is a common example of a DC generator of the type discussed above. Of course, in an alternator, the external torque needed to rotate the coil is provided by the engine of the car. Figure 42: Emf generated in a steadily rotating DC generator.
What are the application of various types of DC generator?
| Types of DC generator Application of DC generator | Self-excited generator (Shunt) It is used for ordinary lighting and power purpose with the regulator. Used for lighting battery |
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Is a generator DC or AC?
Machines that convert mechanical energy into electrical energy are termed as generators. Generators are of two types alternating current and direct current generators.
Are most generators AC or DC?
Currently, the overwhelming majority of generators are the AC type , because the DC units have brushes that require periodic replacement. Although the electrical systems in many autos had DC generators before the 1960s, lower-maintenance AC units replaced DC generators.
What is the principle of DC generator?
A DC generator operates on the principle of Faraday's laws of electromagnetic induction . According to Faraday's law, whenever a conductor is placed in a fluctuating magnetic field (or when a conductor is moved in a magnetic field) an EMF is induced in the conductor.
Is there a DC generator?
A direct-current (DC) generator is a rotating machine that supplies an electrical output with unidirectional voltage and current. The basic principles of operation are the same as those for synchronous generators. ... The field is produced by direct current in field coils or by permanent magnets on the stator.
What are the advantages of DC generator?
From what you read above, we can say that the main advantages of DC generators include simple design, simple parallel operation, and fewer problems of system stability .
What are the applications of DC motor?
- Cranes.
- Air compressor.
- Lifts.
- Elevators.
- Winching system.
- Electric traction.
- Hair drier.
- Vacuum cleaner and in speed regulation application.
What are the similarities and differences between electric motor and generator?
| Electric Motor Electric Generator | The shaft of the motor is driven by the magnetic force generated between the armature and the field. In electric generators, the shaft is attached to the rotor and is driven by the mechanical force. |
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What are the applications of DC shunt motor?
- These motors are used wherever stable speed is required.
- This kind of DC motor can be used in Centrifugal Pumps, Lifts, Weaving Machine, Lathe Machines, Blowers, Fans, Conveyors, Spinning machines, etc.
Are batteries AC or DC?
Batteries and electronic devices like TVs, computers and DVD players use DC electricity – once an AC current enters a device, it's converted to DC. A typical battery supplies around 1.5 volts of DC.
What is the difference between DC motor and DC generator?
A DC motor and generator convert mechanical and electrical energy into electric power. DC generator uses the right-hand rule of Fleming while DC motor uses the left-hand rule of Fleming .
How can we identify AC and DC?
Look for the commutator & brushes and salient field system to confirm. (iii) has 5 terminals, then it is a AC synchronous motor (3 for stator and 2 for field). Look for 2 slip rings for rotor dc supply. (iii) has 4 terminals, then it may be a DC motor, in which case look for the commutator & brushes to confirm.
How does a generator convert AC to DC?
All generators produce a sine wave, or AC currents when the rotor turns in the magnetic field. The commutator on the DC generator converts the AC into pulsating DC. The commutator assures that the current from the generator always flows in one direction.
