Induction Motors - No. of Poles and Synchronous vs. Full Load Speed
Synchronous and full load speed of amplitude current (AC) induction motors.
Synchronous and approximate full load speed of AC synchronous electrical induction motors:
| Number of Poles | Speed (rpm) | |||
|---|---|---|---|---|
| Frequency (Hz, cycles/sec) | ||||
| 60 | 50 | |||
| Synchronous | Full Load | Synchronous | Full Load | |
| 2 | 3600 | 3500 | 3000 | 2900 |
| 4 | 1800 | 1770 | 1500 | 1450 |
| 6 | 1200 | 1170 | 1000 | 960 |
| 8 | 900 | 870 | 750 | 720 |
| 10 | 720 | 690 | 600 | 575 |
| 12 | 600 | 575 | 500 | 480 |
| 14 | 515 | 490 | 429 | 410 |
| 16 | 450 | 430 | 375 | 360 |
| 18 | 400 | 380 | 333 | 319 |
| 20 | 360 | 340 | 300 | 285 |
| 22 | 327 | 310 | 273 | 260 |
| 24 | 300 | 285 | 240 | 230 |
| 26 | 277 | 265 | 231 | 222 |
| 28 | 257 | 245 | 214 | 205 |
| 30 | 240 | 230 | 200 | 192 |
Example - Speed of Electric Motor
A motor with 4 poles runs with frequency 50 Hz. The synchronous speed is 1500 rpm and the typical full load speed is 1450 rpm. The slip is the difference between synchronous and load speed - 50 rpm.
Related Topics
-
Electrical
Electrical engineering with units, amps and electrical wiring. Wire gauges, electrical formulas, motors and more.
Related Documents
-
Building Materials - Radiation Constants
The radiation constant is the product between the Stefan-Boltzmann constant and the emissivity constant for a material. -
Electric Motors - Torque vs. Power and Speed
Electric motor output power and torque vs. rotation speed. -
Electrical Induction Motors - Slip
Slip is the difference between an electrical induction motor's synchronous and asynchronous speed. -
Electrical Induction Motors - Synchronous Speed
Operating speed of an induction motor depends on the input power frequency and the number of magnetic poles in the motor. -
Three-Phase Electrtical Motors - Power Factor vs. Inductive Load
Inductive loads and power factors with electrical three-phase motors.
