የቋሚ ማግኔት ሞተር ዘንግ መያዝ ጠመዝማዛው እንዲቃጠል ሊያደርግ ይችላል?

A user raised a question regarding whether holding the shaft of a permanent magnet motor could cause the winding to burn up. In order to address this question, let's discuss the issue briefly.

Firstly, let's consider a three-phase motor.

የተወሰኑ የአፈፃፀም አመልካቾችን መከበራቸውን ለማረጋገጥ የመትከያ ሙከራው ለሶስት-ደረጃ ያልተመሳሰሉ የኬጅ ሞተሮች አስፈላጊ የፍተሻ ንጥል ነው።

አንድ ሞተር በተሰየመ የቮልቴጅ መጠን ሲጀምር, የሞተሩ ጅረት ከተገመተው 5-7 እጥፍ ሊደርስ ይችላል.

If the motor cannot be started normally for some reason, or the rotor is at rest, or the motor rotor is in a low-speed state, then the motor makes a very low sound, and the motor winding will be in danger of burning in a short time.

To ensure the safe operation of this motor, soft start and over-current protection can be used to avoid excessive current during motor starting and the winding burning problem that occurs when the motor runs under voltage and happens to hold the shaft unexpectedly.

በቋሚ ማግኔት የተመሳሰለ ሞተር ሁኔታ ውስጥ, ሞተር ተጀምሮ ወደ inverter በኩል ይሰራል, እና inverter መለኪያዎች ሞተሩን ልዩ የሥራ ሁኔታዎች ለመጠበቅ ተቀናብረዋል.

ነገር ግን, የ rotor ማቆሚያ ሁኔታ በተለዋዋጭ የኃይል አቅርቦት በቀጥታ በሚንቀሳቀስ ሞተር ውስጥ ሲከሰት, ወደ አሁኑ መጨናነቅ እና በተመሳሳይ ጊዜ ወደ demagnetization ችግር ሊያመራ ይችላል.

የቋሚ መግነጢሳዊ ሞተር ኃይል ትክክለኛ ምርጫ ዲማግኔትዜሽንን ሊከላከል ወይም ሊዘገይ ይችላል።

በቋሚ ማግኔት የተመሳሰለ ሞተሮች ውስጥ የዲግኔትዜሽን ዋና መንስኤ ከፍተኛ ሙቀት ነው, ይህም በዋነኝነት የሚከሰተው ከመጠን በላይ መጫን ነው.

Holding the shaft of the motor can result in severe overload, and thus, the motor should be operated with a certain amount of margin in power selection.

Additionally, heavy load starting and frequent starting should be avoided in order to prevent demagnetization.

During the asynchronous starting process, the starting torque is oscillating, and in the starting torque valley section, the stator magnetic field can demagnetize the rotor pole.

Therefore, it is recommended to avoid heavy load and frequent starting of asynchronous permanent magnet synchronous motors.