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What is the relationship between torque and slip?
Torque in an induction motor is proportional to slip, which is the difference between the synchronous speed and the actual rotor speed. As slip increases, torque also increases, up to a certain point. This relationship is key to understanding the motor's operating characteristics.
Why does the rotor of an induction motor turn slower than the revolving field?
In an induction motor the rotor currents are induced by the magnetic field of the stator, and if the motor were to run at synchronous speed the induced currents and also the torque would fall to zero. The rotor currents alternate at a low frequency determined by the 'slip', which is the percentage amount that the rotor speed is below the synchronous speed. The output torque is proportional to the slip at near-synchronous speeds.
Why is the synchronous machine called a reversible machine?
A synchronous machine is called a reversible machine because it can operate in both motor and generator modes. In motor mode, it converts electrical energy into mechanical energy to produce motion, while in generator mode, it converts mechanical energy into electrical energy. This ability to switch between modes makes it reversible.
What two factors determine synchronous speed?
Synchronous speed is determined by the number of poles on the motor and the frequency of the power supply. Mathematically, synchronous speed (in RPM) can be calculated as 120 times the frequency of the power supply divided by the number of poles.
What calculated speed of a four-pole split-phase motor is 1800 RPM. However if you measure the shaft speed you will find it to be 1725 RPM. What causes this loss of rotational speed?
The loss of rotational speed is due to slip in the motor. Slip is a natural characteristic of induction motors and is necessary for torque production. The difference between the synchronous speed (1800 RPM) and actual shaft speed (1725 RPM) represents the slip in the motor.
Difference between synchronous generator and synchronous motor?
ASYNCHRONOUS is a mode whereby events happens irregardless of control. SYNCHRONOUS are this same events but controlled by a timing and/or control
What is a slip in electricity?
it is the difference between the synchronous and asynchronous speed of a induction motor
What is a syncronous condenser?
A synchronous condenser is physically an electric generator/motor without a mechanical power source. Electrically a synchronous condenser changes the timing between rise and fall of current compared to voltage (phase angle). They also use stored energy to smooth small power fluctuations.
What is the difference between synchronous motor vs induction motor and which one is better?
The big difference is that the synchronous motor's rotor can have a variable current applied to it through its field slip rings. Both types of motors have their own advantages. With a synchronous motor in the system, the systems power factor can be regulated.
What is slip and slip motor?
the difference between the synchronous speed and actual speed is called as slip
What are slip and slip speed in an induction motor?
Slip in an induction motor is the difference between the synchronous speed of the magnetic field and the actual rotor speed, expressed as a percentage of the synchronous speed. It is calculated using the formula: Slip = (Synchronous Speed - Rotor Speed) / Synchronous Speed. Slip speed, on the other hand, refers to the actual difference in RPM between the synchronous speed and the rotor speed. This slip is crucial for the operation of the motor, as it is what allows the rotor to develop torque.
How synchronous motor can function as a synchronous condenser?
If a motor is spinning under no load, it is storing some energy in the rotating mass. This energy can be stored and released in the same way capacitors and inductors store and release energy. This is what a synchronous motor acting like a condenser is doing. The way it appears to the power system is dependent upon the field current applied to it. If used as a motor, this is controlled to keep it spinning at the desired speed under load. If used as a condenser, it is controlled to determine whether it will be releasing power ahead of or behind the power system (absorbing or releasing VARs).
Difference between synchronous and asynchronous motors?
1)Synchronous motors are those that run only at Synchronous speed i.e. constant speed. But Motor can run in various speeds. 2)Synchronous motors runs at same speed of magnetic filed. but if one consider case of induction motor the rotor rotates at different speed than revolving magnetic field. there is slip between field and rotor.
Difference between induction motor and induction generator?
in case of induction motor the rotor speed is less than synchronous speed giving positive slip but in case of generator the rptor speed is greater than synchronous speed giving negative slip.......
What is synchronous machein?
mainly alternator,synchronous motor comes under the synchronous machine.a synchronous motor is not a self starting motor.if a synchronous motor moves with more than synchronous speed then it acts as a synchronous generator.
What is slip of synchronous motor?
A synchronous motor runs at synchronous speed, so there is no slip, or zero slip.
What is the slip of synchronous motor?
A synchronous motor runs at synchronous speed, so there is no slip, or zero slip.
