Timeline for Does the frequency of input voltage in induction motors have to be continuously altered?
Current License: CC BY-SA 4.0
6 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jul 26 at 21:55 | comment | added | Yaniv Ben David | Thanks, @user1683793 | |
| Jul 24 at 1:19 | comment | added | user1683793 | This is such a great write up but maybe I can add a little clarification. The torque of the motor is proportional to the difference between the rotation speed and the synchronous speed-- the speed of the magnetic field as a result of the supply voltage frequency. If the motor is stalled, the torque is maximum, as is the current. If the motor doesn't start, in most cases, it will burn up. In the US, four pole motors have a synchronous frequency of 1800 RPM, one half (since they are four pole) the 60 Hz line frequency. | |
| Jul 24 at 1:09 | history | edited | user1683793 | CC BY-SA 4.0 |
such a great write up deserves corrected spelling and working
|
| Jul 21, 2019 at 14:11 | comment | added | Yaniv Ben David | I don't see what you try to say. This statement is always true. A decrease in the accelerating torque still ends up in an accelerating shaft, it just accelerates slower.... | |
| Jul 21, 2019 at 6:19 | comment | added | user14407 | "As the relative velocity is getting smaller, the induced current also decreases and so is the accelerating torque." That is true if the working point of the motor has already passed the pull-out torque. Otherwise what you say doesn't quite add up. | |
| Jul 20, 2019 at 14:28 | history | answered | Yaniv Ben David | CC BY-SA 4.0 |