Why does the electric motor on the Taiga sawmill stop under load without dropping the voltage? I answer the question

  • Mar 25, 2021
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For your attention, there are already 77 questions in a row that were asked to me by a reader who introduced himself as Cyril. If you have your own answer to the question, then write it in the comments below. I and other readers of my channel will be happy to read it.

I quote verbatim the text of the question itself:

The Taiga sawmill has an 11 kilowatt engine at 1500 rpm. It stops under load, while the voltage does not drop, it is equal to 227-230 per phase. Voltage does not drop when starting. Well, the engine does not seem to be running at full power. The voltage was measured both before the sawmill and at the entrance to the engine. The engine was changed and the same situation.
The photo is illustrative.
The photo is illustrative.

I considered the issue and consulted Kirill within the framework of my knowledge and qualifications as follows:

If I understand correctly, you have completely checked the wiring and the electrical part of the sawmill - for the electric drive itself sufficient voltage is supplied, and replacing the previous electric motor with a serviceable one also did not give any positive results.

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This means that a malfunction of the motor windings, damage to the stator or rotor can be immediately excluded.

It follows from this that the reason lies in the mechanical part of the sawmill. If, after applying the load, the motor stops rotating with sufficient torque, then the reason may be:

  • inconsistency of the size of sawn timber with the permissible dimensions of the sawmill;
  • Saw blade clogging - you need to clean the cutting elements;
  • wandering of the canvas - it is necessary to adjust the tension for a clear fixation;
  • poor fixing of the object being processed - you need to fix the log;
  • bearings are jammed or seized - you need to clean the seats or adjust their position;
  • improper sharpening or the entire geometry of the saw in relation to the structure of the wood - sharpen the saw in accordance with the instructions;
  • excessive clogging of the log, dirt slows down the rotation of the working body - it is necessary to remove dirt, tar and other clogs;
  • the saw is dull, the effort is not enough to cut the wood - you need to sharpen the saw again.