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Always magnetic belt synchro motor direct torque control

system

0 - preface

Synchro motor because of having power factor higher -, run - timeefficiency higher -, stability good, the revolving speed Heng settles to wait a merit, is extensively been applied to industrial production amid.The startingfault that acquaints with synchro motor, and debugging in time, all have important meaning to the motor and the production systemses.By wayof energy in time, accurate debugging and transaction fault, have tovsthefamiliar fault progress of the synchro motor in detail analytical! 1 - Familiar fault

1.1- The synchro motor after switching on electricity the incapability starts

The synchro motor after starting the incapability run - time generally has the reason of severals as follows:

(1) Power supply voltage over low.Because at the square of voltage, the starting

torque direct proportion of synchro motor's the voltage of power supply over make low the starting torque of synchro motor significantly the droop is lower than load troque, can not start thus and want to raise vs this power supply voltage to enlarge the starting torque of dynamo.

(2) The fault of motor.Check motor settle, the rotor winding had no short circuit,

open circtui, open soldering and link bad etc. fault, these the faults will make the dynamo can not start to create starting of rating of intensity of magnetic field, make thus the dynamo can not start;Checking the motor bearing has already had no failure, the port cap has have no loose, if bearing failure port shroud loose, result in bearing's down sinking, mutually rub with stator iron core, result in thus dynamo's canning not start, vs settle the rotor fault can be shaken table with the low tension, gradually click to check to seek a fault condition and adopt homologous treatment;The countersgaft accepts and carries to shroud a loose condition and all wants a pan car before driving each

滨州学院专科毕业设计(外文翻译)

time and sees motor rotor whether slewing is vivid, if bearing or shaft kiowatt damage and replace in time.

(3) The control device breaks down.This kind of faults are mostly the d.c. output

voltage of the windings of Li magnetic belt to adjust not appropriate or don't output, result in the stator current of motor over big, cause the motor conduct electricity the run make or the losing of dynamo magnetic belt run - time.Should check whether output voltage current and its waveform that the Li magnetic belt equips is normal at this time, the Rong breaks whether the machine Rong breaks, the contact is bad;Whether circuit board plug-in puts prison or alignment;Check loop resistance, put out whether crystal gate tube of magnet burns out or brokes through.

(4) Mechanical trouble.Such as be dragged along a dynamic machinery to block,

result in motor incapability's starting, the rotor that moves motor in response to the pan at this time sees whether the slewing is vivid, machinery burden whether existence fault

1.2- The synchro motor incapability leads long into synchronization.

Synchro motor in common use law of nonsynchronous starting, throw in Li magnetic belt when the motor rotor revolving speed hits synchronous revolving speed of 95%, make it leads long into synchronization.The synchro motor incapability leads long into synchronous reason as follows:

(1) The Li magnetic belt winding short circuit.Because the winding of Li magnetic belt, existence short circuit breaks down, as a result makes motor able to stabilize run - time but incapability and lead long into synchronization while being lower than synchronous revolving speed.Check to seek the Li magnetic belt winding short circuit, can open into low - tension(about the 30 Vs) in the rotor derivation on - line, put on the magnetic poles surface with a hand work

steel saw, pursue inspection magnetic poles, if vibrating is violent, explain the magnetic poles to have no short circuit on steel saw of the magnetic poles' surface, if the vibrating of saw blade micro or don't flap, explain the magnetic poles short circuit.After unloading the magnetic poles, check the fault to click, is short-circuit degree, adopt local to mend or re- round to make.

(2) Power supply voltage over low.Power supply voltage over low, result in the

strong Li link of the device of Li magnetic belt incapability working, make the motor incapability lead long into synchronization thus, the concrete way is to raise power supply voltage appropriately.

(3) The fault of Li magnetic belt device.Such as throw Li over speedy(namely

throw in Li magnetic belt, motor rotor revolving speed over low), will make the motor can not lead long into synchronization, should check to throw if the Li link exists fault at this time.If Li magnetic belt device fault, the output's current is lower than a rating value, cause the electricity magnetic troque of dynamo over small but can not lead long into synchronization, at this time in response to scrutiny Li magnetic belt device of throw Li link and phase - shifting link, waveform use oscillograph to check to throw Li link and phase - shifting link, should also check and put out magnetic belt link and put out crystal gate of magnetic belt whether tube discovers a question as usual, handle in time, if the incapability handles in time, by way of the energy quickly restore capacity, should replace to provide for use circuit board.

1.3- Brush and compress tightly spring and gather to give or get an electric shock ring fault.

The brush leads short and compresses tightly spring press scarcity and make brush and gather to give or get an electric shock ring of indirectly touch badly, thus generate spark or arc electric, arc electric or spark to on the other hand and easily spark short circuit, will make arc electric burn on the other hand shorter, spark open circtui thus, result in Li magnetic belt device only the Li magnetoelectricity press but have no Li