0
What else can I help you with?
How do you counter the induced voltage spark during the generator?
By creating a rotating electric field. The generator has two main sets of windings - the field windings (the spinning ones on the rotor usually) and the stator windings(the stationary part connected to the grid). The field windings are electrified to create an electromagnet out of the rotor. Spinning the rotor creates a rotating electric field, which induces a voltage on the stator windings.
What would happen to the output of an ac generator if one of the stator windings has open?
There would be a significant decrease in the output of the generator. Depending on the type of generator, it could stop working altogether.
What would happen to the output of an AC generator if one of the stator windings has an open?
There would be a significant decrease in the output of the generator. Depending on the type of generator, it could stop working altogether.
What type of motor has a stator?
An electric motor has a stator and a rotor. The stator does not move. The rotor rotates inside the stator.
Is a 3 phase motor a Synchronous motor?
A synchronous motor can be a type of 3-Phase AC motor, or not.A synchronous motor is defined by the period of the rotor being synchronized with the frequency of the stator windings' current. The stator windings might be 3-Phase or not (2-Phase would work).Also synchronous motors are not the only type of 3-Phase AC motors. An induction motor could also be 3-Phase AC and has a few advantages and disadvantages over a synchronous motor.
How Synchronous motor work with principal?
A synchronous motor comprises of a stator windings and a rotor with a squirrel cage and inside that is windings(coils). At starting, this motor is an induction motor running with slip. After the rotor has reached a certain speed, a DC current is applied to the windings inside the squirrel cage. A fixed field is induced in these windings. This field locks in with the synchronous rotating magnetic flux of the stator windings. The rotating stator windings then pull the rotor along. The amount of excitation current can be used to control the power factor of the motor, making this a popular type of motor for high power use with a constant mechanical load.
How do you counter the induced voltage spark during the generator?
By creating a rotating electric field. The generator has two main sets of windings - the field windings (the spinning ones on the rotor usually) and the stator windings(the stationary part connected to the grid). The field windings are electrified to create an electromagnet out of the rotor. Spinning the rotor creates a rotating electric field, which induces a voltage on the stator windings.
How does a generator make energy?
A generator doesn't store energy it just transforms it typically from burning a fuel (like gasoline) to mechanical energy (like an internal combustion engine) then from mechanical energy to electrical current.
What would happen to the output of an ac generator if one of the stator windings has open?
There would be a significant decrease in the output of the generator. Depending on the type of generator, it could stop working altogether.
What would happen to the output of an AC generator if one of the stator windings has an open?
There would be a significant decrease in the output of the generator. Depending on the type of generator, it could stop working altogether.
What type of motor has a stator?
An electric motor has a stator and a rotor. The stator does not move. The rotor rotates inside the stator.
Is a 3 phase motor a Synchronous motor?
A synchronous motor can be a type of 3-Phase AC motor, or not.A synchronous motor is defined by the period of the rotor being synchronized with the frequency of the stator windings' current. The stator windings might be 3-Phase or not (2-Phase would work).Also synchronous motors are not the only type of 3-Phase AC motors. An induction motor could also be 3-Phase AC and has a few advantages and disadvantages over a synchronous motor.
What are the differences between single phase induction motor and a stepper motor?
An induction motor is predominantly a AC device to convert electrical energy to mechanical. The operational windings are usually on the stator which is normally the outer frame of the motor. The rotor has laminated iron core drum with special windings which are in no way physically connected with the stator circuit. When the stator is energised with a suitable AC supply of a predetermined frequency range, a rotating magnetic field is generated. This in turn induces a voltage by transformer type action into the special winding on the rotor. The current flowing in the rotor windings tries to oppose any voltage induction from taking place in the rotor. This can ideally happen when the rotor is turning at exactly the same speed as the stator magnetic field. In practice the stator will keep running at a speed slightly slower depending on the rotor load. The stepper motor is more of a mechanical postioning device & the powers handled are far lower than of induction motors. It also is basically a DC pulse operated device. It has special pairs of windings on the stator which have to be energised in a particular sequence for correct operation. The rotor consists of a drum with very strong permanent magnets arranged in a pattern such that the pulsed energisation of the stator will cause the rotor to follow rotating pattern caused by the pulsed current. If the stator winding is energised with DC the stator will lock to the magnetic field & will not rotate for considerable torque on the stator. The stepper can rotate at wide rates from zero to a certain maximum depending on the motor & supply characteristics.
Is the reverse effect of converting rotation to electrical energy is possible when the power is turned off in the ceiling fan?
The type of electric motor commonly used in ceiling fans does not make a good electrical generator. It is what is known as an AC (Alternating Current) Shaded-Pole Motor, a type of induction motor. An induction motor resembles a rotating transformer, because the stator (stationary part) is essentially the primary side of the transformer and the rotor (rotating part) is the secondary side. There are no brushes, and no direct electrical connection to the rotor windings. More specifically, these motors are often referred to as "squirrel cage" motors. Squirrel-cage motors have a relatively heavy winding made up of solid bars, usually aluminum or copper, joined at the ends of the rotor. Currents induced into this winding provide the rotor magnetic field. The alternating electromagnetic fields created by the current flowing in the stator windings induce the current into the rotor windings. It is the interaction between the rotor and stator fields that cause the motor to turn. Since power for the rotor is a result of the power fed to the stator, and there is no actual physical electrical connection between the two components, if no current is present when the motor is at rest, none will be produced if it is mechanically driven in an attempt to use it as a generator.
How does an induction motor start?
The emf induced in the rotor depends upon the rotor frequency which further depends on relative speed between rotor and synchronous speed of rotating magnetic field. The relative speed at the time of starting or standstill is maximum and hence large emf in induced in rotor conductors or winding due to which very high current flows in rotor which is generally 5 to 7 times of the full load or running current of an indication motor. The starting current, sometimes called inrush current will be 8-10 times higher than the motor's rated current because the motor is at rest. When at rest, the motor appears to be a transformer, with it's secondary winding short circuited, i.e. the rotor winding or squirrel cage is a closed circuit. This results in a low impedance to the system voltage and the motor has a "locked rotor" current of typically 6 times full load current, but also up to 8 and sometimes 10 times current. This starting value is independent of any load attached, however, the inertia of the motor and load has to be overcome. This is especially true when the motor is connected to a load, like a conveyor belt with product on it. The larger the inertia, the longer the motor takes to reach full speed. As the motor accelerates, part of the starting current power overcomes this inertia and is conveted to kinetic energy. The remaining power of the starting current heats the rotor, up to possibly 250 deg C for a "long" start (20 seconds!!). During the first couple of cycles of AC current, transient currents make some of the phases have higher assymetrical values, which can cause nuisance tripping of the supply breakers to the motor, when protection settings are too low! Equation for current: I = P / cos phi / ( 1.732 * V), (cos phi can be 0.3 during starting). V (voltage) stays pretty much constant, therefore I (current) must rise (but is limited to the locked rotor value for the specific motor) as P (power) is required to start the motor and to keep it running. Some voltage drop will occur for most power systems during a motor start, thus with a constant locked rotor impedance, the starting current will reduce proportionally. I start = V / 1.732 / Z (locked rotor) for a three phase motor. (Z is fixed) When nearly full running speed is reached, the current drops rapidly to full load current or less, depending on the actual load attached. -Don't forget to recommend Kevlarster if you like this answer!
What are the types of winds?
Local wind and Global wind
How is thermal overload protection done in stator windings of motor?
one way is to use RTD sensor put inside the motor windings. The RTD sensor is connected to an electronic thermal overload relay. This type of relay can provide running temperature of the motor, on the electronic thermal over load relay display panel. RTD sensor is a wire wound resistor that changes resistance depending on the temperature
