What is an electric motor?
What is the use of brushes in an electric motor?
Answer .
Brushes transfer electricity to the commutator which is connected to the winding on the armature. The brushes and commutator form a electrical connection that is good when the brushes are stationary and the commutator is spinning. The commutator on a DC motor is sectioned to power dif…ferent windings at different times, creating moving field necessairy to pull the armature off a direct current. ( Full Answer )
What do electric motors do?
Answer .
An electric motor is a device which converts electrical energy into mechanical energy in order to do work.
When do we use the electric motor?
An electric motor is used when an internal combustion engine is notpractical. They are capable of being used in very tiny or largeapplications without producing any emissions.
What is the importance of the electric motor?
The importance of the electric motors is that it provides a motorwhich can be operated without volatile fuels or harmful exhaust. Itprovides consistent power which can be operated in nearly anyenvironment.
How do you change the motor of an electric dryer?
As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed. Before you do any work yourself, on electrical circuits, equipment or appliances, always use a test meter to ensure the circuit is, in fact, de-…energized. IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB SAFELY AND COMPETENTLY REFER THIS WORK TO QUALIFIED PROFESSIONALS. ( Full Answer )
Electric motor parts?
Electric motor parts are pieces of electric motors. Some examplesof electric motor parts are: bearings, carbon brushes, gasketmaterials, pumps, soft starters, and terminal boxes.
What is the circuit for reversing an electric motor?
I HAVE A SMALL ELECTRIC CLOCK MOTOR THAT I NEED TO REVERSE. WHAT IS THE CIRCUIT I NEED TO REVERSE IT?
Can a DC motor generate electricity?
Depending on how the magnetic field of the stator is created, some types of DC motor can be used to generate electricity. If the magnetic field is created either by a permanent magnet or by a field winding that is powered from another source, such as a battery supplying the correct voltage, then …that type of motor can usually be made to work as a "dynamo" to generate electricity if it is made to turn fast enough by using another source of power such as, for example, a gas- or steam-powered engine. ( Full Answer )
Appliances that use electric motors?
Answered any number of times - let me see if I can get some less common ones Almost any toy that moves and uses batteries iPhone (or any cell phone with a vibrator setting) power windows printer microwave oven DVD drive sink garbage disposal a laser barcode scanner ( like at a groce…ry store - a motor spins the mirror to allow the laser to scan ) gas pump ( like at a gas station ) paper shredder garage door opener a water tower an elevator ( Full Answer )
How to do the megger test in electric motor?
Briefly, a megger test is testing an electric circuit at load. The circuit might prove good at normal resistance measuring but fails when applying high voltage. Read the megger result correctly, every electric circuit will fail if stressed high enough. Disconnect any servo drive or frequency control…ler before testing. ( Full Answer )
How are electrical generators and electrical motors different?
The basic difference between an electrical generator & electrical motor is the conversion of energy. Principally, in case of electrical generator the mechanical energy (steam, water, wind) is converted into electrical energy whereas in case of electrical motor the electrical energy is converted in…to mechanical energy. Electrical generators are used for generating electrical power while electrical motors are used to consume electrical energy to do some mechancial work eg. pumping water, moving elevators etc. well the above answer provided by another fellow engineer In generators though we provide mechanical energy we need to energize the field and of course we've self excited generator. where as in motors (AC) we provide suppy to the stator itself and suppy will be induced in rotors to get rotation in DC stator and rotor is connected either in series or shunt. collectively we provide suppy to it ( Full Answer )
What electric motor does an electric car use?
A electric car uses either a DC or AC motor. Typically they use DC motors.
How you test the electric motor that it produces electricity?
Electric motors do not produce electricity, they use electricity, and convert that energy to another form of energy, that we measure in horsepower..
See related links.
Which electrical wires bring electricity to an electrical device or motor?
which electrical wires bring electricity to an electrical device or motor .
The cable, otherwise known as the flex or the lead.
How an electric motor from electric generator?
Electric motors take electric energy and turn it into kinetic energy Generators and alternators take mechanical energy n turn it into electric energy
Can you change the RPMs of an electric motor?
yes, you can. in A/C motor rps(rev/sec) is N(rps)= f/p where f is the frequency and p is the number of pair poles. By increasing or decreasing the frequency the rps will change accordingly. By having less or more pair poles the rps will be increased or reduced. the more pair poles the lower will be …the rps. ( Full Answer )
How do you turn an electric motor into an electric generator?
The simple answer is: You start with a motor with permanent magnets and then simply turn the output shaft by hand and you will get current from the power input of the motor. However, there are AC and DC motors. Whether you are using a DC motor to charge a battery or an AC motor to power a tool, you …will need to turn it at a precise speed to get results. Specially with AC, because you need to worry about frequency (60 hertz ). You also must turn it in reverse. Maybe somebody can expand on this answer. ( Full Answer )
Which change occurs in an electric motor?
Electrical energy is used to create a electromagnet with alternating poles. These alternating poles will cause another magnet with constant poles attached to an armature to turn and create mechanical energy.
How do you measure rpm of electric motor?
Two methods, one uses a dial that is held in the center of the revolving shaft and is directly read off of the dial face. The second method uses a strobe light. The light is focused on the shaft and the dial on the strobe is turned until it looks like the shaft has come to a stand still. The RPM is …read off of the meter face of the strobe light. ( Full Answer )
How does an electrical motor in an electrical scooters work?
just synopsis to explain either its AC or DC motor there exsist a battery for power supply, ac can be generated using a inverter circuit and iginition is at key accelerator is a potentio-meter by which you can contorl the supply to the motor better google it for more precise explanation… .
It depends on the type of electric motor. The most common is a DC motor with brushes. In this type of motor, a battery supplies an electric current through a coil of wire inside the motor housing. This coil of wire is called the rotor. When you run a current through a wire, it induces a magnetic field. Surrounding the rotor, are permanent magnets and these make up the stator. So when your electric current creates a magnetic field, the rotor wants to spin to align itself with the magnetic field created by the permanent magnets. As the rotor spins, a device called a commutator reverses the direction of the electric current. When this happens, the magnetic field that the coil of wire produces reverses polarity ( North becomes South and South becomes North). So now the rotor spins again to realign with the magnetic field. This is repeated over and over to keep the rotor spinning. ( Full Answer )
What is the main purpose of an electric motor?
to help people with electricity. Without it you wouldn't have thelight or lamps at your house.
Can you use an electric motor as a dynamo?
Yes, but it is not advisable to pass the free run speed of the motor at maximum voltage. (might overheat)
What is the overheating voltage of an electric motor?
Motors overheat due to excessive current, not necessarily voltage. Normal voltage can cause a motor to overheat if it is stuck (not spinning). The problem is not usually the voltage, but whatever is causing excessive current flow (usually because the motor is not spinning like it is supposed to).
Can an electric motor be made to generate electricity?
For some kinds of electric motors - not all kinds - the answer is yes. It is hard to explain the reasons using very simple terms, but here goes: Most small direct current electric motors that have stators which are made of permanent magnets can be made to generate direct current electricity wh…en their rotors are turned at a fast enough speed by another engine, such as, for example, a car engine or a steam engine. .
For more information see the answer to the Related Question shown below. ( Full Answer )
The speed of an electric motor can be controlled by?
By using the star- delta starting method .
By using variable rhoestats .
By using auto transformers
Can a motor supply electricity?
Yes and no. If a motor was supplying electricity to a system, then it would be called a generator. The device, while unexcited, is both a generator AND a motor, but until it excites a system (a generator) or is excited by a system (a motor) does it becomes one or the other.
What are the different types of electric motors?
Electric Motors? .
The 'AC' in AC motors stands for alternating current and indicates that these machines use an alternating current to provide power. An alternating current means that the electrons traveling along the conductor switch direction regularly, so that they flow first forwards and the…n backwards. AC electricity was first invented by Nikolas Teklas in the 1880s. AC electric motors can retain energy more efficiently than DC machines and they are also better able to transfer different amounts of power..
AC electric motors consist of two main parts: the external stator and the internal rotor. The stator is responsible for producing a rotating magnetic field which in turn produces the torque received by the rotor. There are two different categories of AC machines, the induction and the synchronous. Induction electric motors use an induced current to produce the magnetic field and will always runt at a slightly slower or faster speed than the supply frequency. Conversely, synchronous machines do not rely on an induced current and are able to run at exactly the same speed as the supply frequency..
Most AC machines use squirrel cage rotors, named for their resemblance to the exercise toy for rodents. These rotors have two ring shaped windings at either end with bars running along the length of the rotor. The squirrel cage rotors used in AC electric motors generally act as transformers, acting to bring the rotor into synchronisation with the stator's field. As the mechanical load on the machine increases, the rotor also increases the power used. .
Two type of electric motors:- AC motors: These motors are driven by alternate current. You can find two main types of AC motors - Induction motor and Synchronous motor. Induction motor runs slightly slower than the supply frequency. It is named so because the magnetic field on the rotor of this device is created by an induced current. .
DC motors: These motors can rotate exactly at the supply of the frequency or a sub-multiple of the supply frequency as they do not rely on induction. In this device, the magnetic field on the rotor is generated either by current delivered by the slip rings or by a permanent magnet. . ( Full Answer )
What is the horsepower rating of an electric motor?
Horsepower is the Imperial unit of measurement for power. In North America, the horsepower is still used to define the rated output power of a motor, whereas the watt is used to define its corresponding input power. Because no device is 100% efficient, a motor's rated output power is always lower… than its corresponding input power. Elsewhere in the world, horsepower is considered to be an obsolete unit of measurement and, so, the watt is used to define both the rated output power and the corresponding input power. ( Full Answer )
What causes motion in electrical motors?
Electricity. The energized coils in the A.C. motors' stator cause eddy currents forcing the rotor to move. A D.C. motor acts like magnets turning on to repulse the opposite magnet, pushing it away. Switching polarities so it continues.
How does an electric motor fan work?
An electromagnet is the basis of an electric motor. You can understand how things work in the motor by imagining the following scenario. Say that you created a simple electromagnet by wrapping 100 loops of wire around a nail and connecting it to a battery. The nail would become a magnet and have a n…orth and south pole while the battery is connected. Now say that you take your nail electromagnet, run an axle through the middle of it and suspend it in the middle of a horseshoe magnet as shown in the figure below . If you were to attach a battery to the electromagnet so that the north end of the nail appeared as shown, the basic law of magnetism tells you what would happen: The north end of the electromagnet would be repelled from the north end of the horseshoe magnet and attracted to the south end of the horseshoe magnet. The south end of the electromagnet would be repelled in a similar way. The nail would move about half a turn and then stop in the position shown. You can see that this half-turn of motion is simply due to the way magnets naturally attract and repel one another. The key to an electric motor is to then go one step further so that, at the moment that this half-turn of motion completes, the field of the electromagnet flips . The flip causes the electromagnet to complete another half-turn of motion. You flip the magnetic field just by changing the direction of the electrons flowing in the wire (you do that by flipping the battery over). If the field of the electromagnet were flipped at precisely the right moment at the end of each half-turn of motion, the electric motor would spin freely. ( Full Answer )
Does a Beakman's Motor create electricity?
no, not by itself. Although, it does use electricity which is used to send a current through the copper ring creating a magnetic field.
What was the first commercial electric motor?
Thomas Davenport, a blacksmith from Vermont, developed a motor that successfully powered a printing press. This invention marked one of the earliest uses of the electric motor for commercial purposes
What is a description of an electric motor?
Changes eletrical enegry to mechanical energy. Is found many appliances with moving parts, like a vacum cleaner or a blender.
Why was the induction electric motor important?
one of Nicoli Teslas greatest inventions Used more often than any other type of motor Probably what brought electricity from a curisoty to to a necissity
Why does your 2hp electric motor get hot?
All motors get hot. If yours is getting hotter than normal, it might be overloaded, a winding might be shorted, the start/run switch (if there is one) might not be working, a capacitor might be bad, or you might be running it on the wrong voltage or frequency.
Where is the electric motor located on a Lincoln?
There are many electric motors on a Lincoln, need to know the year and which electric motor you are looking for.
Why electric motor is greater?
it is because you will save money on energy expenses in comparison to a gasoline engine..
How are electric generators different from electric motors?
They both use the same parts, but work differently in the way electricity is applied to them. The basic components of each are a stator (stationary part), a rotor (rotating part), and a wire coil. In an electric generator, the rotor is mechanically driven by an armature and has a wound wire coil …around it. The stator in a generator contains permanent magnets, and when the coil spins around them, it generates voltage, which is conducted to a battery or other device. In an electric motor, electricity is applied through the stator to force the rotor to spin. When a section of the stator is electrified, it produces a positive magnetic charge, which attracts the rotor and forces it to turn toward that part of the stator. The magnetic charge in the stator moves to each section, causing the rotor to follow it at high speed. ( Full Answer )
What does the commutator in an electrical motor do?
If there is a commutator, it means you are dealing with a DC motor. The commutator acts like a switch to supply voltage to a revolving armature from the stationary brush assembly. A commutator has commutator bars, each seperated by mica insulation. Each coil of the rotating armature is connect…ed to two bars that are in directly opposite positions across each diameter of the armature. The total number of commutator bars depends on the design of the windings on the armature: either "lap" or "wave" windings can be used on a DC motor or generator which is provided with a commutator. For more information see the answer to the Related question and also the Related link shown below. ( Full Answer )
What is the comparative of a generator and electric motors?
Generator converts mechanical energy in to electrical energy, where as electric motor converts electrical energy in to mechanical energy.
How heavy is an electric wheelchair motor?
There are many different kinds. -I guess most weigh around 7-10 pounds. The battery is usually heavier.
What electrical devices use an electric motor?
fans, air conditioners, some ovens, hair dryers, computers, space heaters, microwaves, some freezers, projectors, amplifiers, dvd-s, blenders, cd players, VCR-s, printers, scanners, washing machines and dryers, electric lawn mowers, grass trimmers, drills, electric saws, turn tables, And i can't re…member anything else, hope i helped. ( Full Answer )
Where can you find electrical motors in a home?
Blenders, mixers of any kind, fans ceiling or floor, anything that spins and plugs in is most likely an electric motor.
What is the speed of a 3kW electric motor?
The speed of motion generated by a motor is not a function of its nominal power. The nominal power, 3kW in this example, is an indicator for the electric power consumed, and for the force available in the direction of motion. The speed of a motor is determined by its construction, and can cover an …extremely wide range regardless of its power. ( Full Answer )
Do electric motors produce waste?
Since Electric Motors are not 100%, you could say that they produce "waste". I believe that the majority of that "waste" would be in the form of heat. Part of that heat is lost in the windings and is proportional to the square of the current, and part of it would be friction loss in the bearings. El…ectric motors are typically better than 90% efficient. ( Full Answer )
What does it mean when an electrical motor is locked?
It means that a device is added to stop the rotor rotating, forexample for safety during maintenance.
What is the principle operation of electric motor?
An electric motor uses electrical energy to produce mechanicalenergy, very typically through the interaction of magnetic fieldsand current-carrying conductors. The reverse process, producingelectrical energy from mechanical energy, is accomplished by analternator, generator or dynamo. Many types of …electric motors canbe run as generators, and vice versa. ( Full Answer )
What is the highest electric motor efficiency?
Motor efficiency depends on the motor size and how much it isloaded. You get the best efficiency above 75% of the rated load forthat motor. Note the table below: Horsepower Standard Premium Efficiency Efficiency% Efficiency% 1 --- 78.0 --- 82.5 2 --- 78.5 --- 84.0 5 --- 84.0 --- 89.6 10 --- 84.0 --…- 91.1 15 --- 87.5 --- 91.7 25 --- 90.2 --- 93.0 50 --- 91.7 --- 94.1 100 --- 91.7 --- 95.0 250 --- 94.1 --- 95.8 ( Full Answer )
How do you choose bearing of electric motor?
There are numerous bearing suppliers and the best of them havebearing selection guides that you can download or get as apamphlet. In short, you should know or learn for your particular motor.. Speed Reaction forces from the driven load Reaction force from rotor unbalance Reaction force from rotor …magnetic unbalance Operation environment Load duty cycle and shock loads ( Full Answer )
What happens in electric motors?
There are far too many types of electric motors to fully explaintheir operation on this site. Some of the different types ofelectric motors include the following categories: DC, single phaseAC, three phase AC, AC/DC universal, synchronous, asynchronous,induction, reluctance, stepper, servo, synchro,… series connection,parallel connection, permanent magnet, commutated with brushes,self-commutated, brushless, linear, etc. However regardless of the type they all operate internally bycreating patterns of magnetic fields that repel and attractdifferent parts of the rotor and the stator, causing the rotor tomove. ( Full Answer )