What is the maximum speed at which a 60 Hz synchronous machine can be operated?
3,600 rpm
A 60 Hz power supply changes polarity 60 times per second, and a two-pole motor will spin at 3,600 rpm when connected to this source. A four-pole motor will only rotate at 1,800 rpm. For 50 Hz motors, the speed is 3,000 rpm with 2 poles, and 1,500 rpm with 4 poles.
What is synchronous speed for a 2-pole 60hz AC machine?
60 revolutions per second
A 2-pole (pair of N-S poles) alternator will generate a 60 Hz sine wave when rotated at 3600 rpm (revolutions per minute). The 3600 rpm corresponds to 60 revolutions per second. A similar 2-pole permanent magnet synchronous motor will also rotate at 3600 rpm.
What is the synchronous rpm of a 2-pole motor running on 60hz?
3,600 RPM
The speed of 60 Hz 2-pole synchronous generator is 3,600 RPM. AC power frequency is determined by the pole number of the generator p and speed n, freq. = p*n/120. The grid standard frequency is 60 Hz, which is a constant value.
What is the speed of a 3-phase induction motor if has a synchronous speed of 400 rpm and has percentage slip of 5\%?
13. What is the speed of a 3-phase induction motor if has a synchronous speed of 400 rpm and has percentage slip of 5\%? Speed(N) = 380 rpm.
What is synchronous speed in 3 phase induction motor?
In an induction motor, the speed at which the rotating magnetic field (RMF) rotates is known as synchronous speed (NS). The value of the synchronous speed depends upon the number of stator poles (P) in the motor and the supply frequency (f).
What is the synchronous speed of a 3 phase induction motor if has 12 poles and its frequency is 60 Hz?
1. What is the synchronous speed of a 3-phase induction motor if has 12 poles and its frequency is 60 Hz? Synchronous speed(Ns) = 600 rpm.
What RPM is a 2 pole motor?
A two-pole motor operates at 3,600 rpm (7,200 rpm ÷ 2) unloaded, and approximately 3,450 under load. Two-pole motors often are found in pump applications, such as sump pumps, swimming pool pumps, and water recirculating equipment.
What do you mean by synchronous speed of a 3 phase induction motor?
Synchronous speed is the speed of rotation of the magnetic field in a rotary machine. An induction motor always runs at a speed less than synchronous speed. The rotating magnetic field which is produced in the stator will generate flux in the rotor which will make the rotor rotate.
What is the RPM of a 3 pole motor?
| Approximate Electrical Motor Speed (rpm) | ||
|---|---|---|
| No. Poles | Speed with Rated Load | Synchronous Speed (no Load) |
| 2 | 3450 | 3000 |
| 4 | 1725 | 1500 |
| 6 | 1140 | 1000 |
What is synchronous speed in 3-phase induction motor?
When the rotor of 3-phase induction motor runs at synchronous speed the rotor frequency will be?
Explanation: Rotor frequency = s*f1 = 90/60 = 1.5 Hz. rotor speed = 1000(1-0.03) = 970 rpm. 11. A 4-pole, 3-phase slip ring induction motor is used as a frequency changer.
What is slip in 3 phase induction?
The difference between the synchronous speed and the rotor speed is known as slip speed. Slip is defined as the ratio of slip speed to the rotor speed. In a three-phase induction motor, the slip is generally 2\% to 5\%.