Η εξοικονόμηση ενέργειας του κινητήρα πραγματοποιείται κυρίως μέσω έξι προγραμμάτων όπως η επιλογή κινητήρα εξοικονόμησης ενέργειας, η σωστή επιλογή της χωρητικότητας του κινητήρα για την επίτευξη εξοικονόμησης ενέργειας, η χρήση σφήνας μαγνητικής σχισμής αντί της αρχικής σφήνας υποδοχής, η χρήση συσκευής αυτόματης μετατροπής Y/△, η αντιστάθμιση αέργου ισχύος συντελεστή ισχύος ρύθμιση ταχύτητας κινητήρα και υγρού κινητήρα περιέλιξης.
Η κατανάλωση ενέργειας εκδηλώνεται κυρίως στις ακόλουθες πτυχές.
1, Χαμηλή αναλογία φορτίου κινητήρα.
Due to improper motor selection, excessive affluence or changes in production process, the actual working load of the motor is much smaller than the rated load, about 30%~40% of the installed capacity of the motor is running at 30%~50% of the rated load, and the operating efficiency is too low.
2、The power supply voltage is asymmetric or too low.
Due to the unbalanced single-phase load of the three-phase four-wire low-voltage power supply system, the three-phase voltage of the motor is asymmetrical, and the motor generates negative sequence torque, increasing the three-phase voltage asymmetry of the motor, and the motor generates negative sequence torque, increasing the loss in the operation of the motor.
In addition, the grid voltage is low for a long time, making the normal work of the motor current is large, and thus the loss increases, the greater the three-phase voltage asymmetry, the lower the voltage, the greater the loss.
3, the old, old (eliminated) type of motor is still in use.
These motors use E-grade insulation, larger size, poor starting performance, low efficiency. Although experienced years of transformation, but there are still many places in use.
4, maintenance management is not good.
Some units of motors and equipment are not maintained in accordance with the requirements of maintenance, allowing them to run for a long time, making the loss increasing.
Therefore, for these energy-consuming performance, it is worth studying what kind of energy-saving solutions to choose.
01
The selection of energy-saving electric and high-efficiency motors, compared with ordinary motors, optimizes the overall design, selects high-quality copper windings and silicon steel sheets, reduces various losses, and the losses drop by 20% to 30%, and the efficiency increases by 2% to 7%; the payback period is generally 1 to 2 years, some months.
In comparison, the efficiency of high-efficiency motor is 0.413% higher than that of J02 series motor. Therefore, it is imperative to replace the old motors with high-efficiency motors.
02
Proper selection of motor capacity to achieve energy saving The country has made the following regulations on 3 operating areas of three-phase asynchronous motor:
the load rate between 70%~100% is the economic operating area; the load rate between 40%~70% is the general operating area; the load rate below 40% is the non-economic operating area. Improper selection of motor capacity will undoubtedly cause waste of electric energy.
Therefore, using suitable motor, improving power factor and load factor can reduce power loss and save electric energy.
03
Η χρήση σφήνας μαγνητικής σχισμής αντί της αρχικής σφήνας μαγνητικής σχισμής μειώνει κυρίως την απώλεια σιδήρου χωρίς φορτίο στον ασύγχρονο κινητήρα. Η πρόσθετη απώλεια σιδήρου χωρίς φορτίο δημιουργείται στους πυρήνες του στάτορα και του δρομέα από την αρμονική ροή που προκαλείται από το φαινόμενο της σχισμής των δοντιών στον κινητήρα.
Η πρόσθετη απώλεια σιδήρου υψηλής συχνότητας που προκαλείται στον πυρήνα από τον στάτορα και τον ρότορα ονομάζεται απώλεια παλμών. Επιπλέον, τα δόντια του στάτορα και του ρότορα είναι άλλοτε σωστά και άλλοτε λανθασμένα και η ροή του συμπλέγματος επιφάνειας των δοντιών αλλάζει, γεγονός που μπορεί να δημιουργήσει δινορευματικά ρεύματα στο στρώμα της επιφανειακής γραμμής των δοντιών, με αποτέλεσμα απώλειες στην επιφάνεια.
Pulsation loss and surface loss are collectively called high frequency additional loss, they account for 70% to 90% of the motor stray loss, and the other 10% to 30% is called load additional loss, which is generated by the leakage flux.
Although the use of magnetic slot wedge will reduce the starting torque by 10%~20%, the iron loss of the motor with magnetic slot wedge can be reduced by 60k compared with the motor with ordinary slot wedge, and it is very suitable for the modification of motor with no-load or light-load starting.
04
Y/△ automatic conversion device is used to solve the waste of electric energy when the equipment is lightly loaded, and Y/△ automatic conversion device can be used to achieve the purpose of power saving without replacing the motor. Because in the three-phase AC grid, the voltage obtained by different connections of the load is different, and thus the energy drawn from the grid is also different.
05
Power factor of motor reactive power compensation to improve the power factor and reduce power loss is the main purpose of reactive power compensation. Power factor is equal to the ratio of active power to apparent power. Usually, a low power factor will cause excessive current, and for a given load, when the supply voltage is certain, the lower the power factor, the higher the current. Therefore the power factor is as high as possible to save power.
06
Liquid resistance speed control technology for wire-wound motor is developed on the basis of the traditional product liquid resistance starter.
It still adjusts the size of resistance by changing the pitch of pole plate to achieve the purpose of stepless speed regulation.
This makes it has good starting performance at the same time, it is energized for a long time, bringing the problem of heating up, due to the use of a unique structure and a reasonable heat exchange system, its working temperature is limited to a reasonable temperature below.
Liquid resistance speed control technology for winding motor, with its reliable work, easy installation, energy saving, easy maintenance and low investment advantages, has been rapidly promoted, for some speed control accuracy requirements are not high, speed range requirements are not wide, and infrequent speed control of the winding motor, such as fans, pumps and other equipment of large and medium-sized winding asynchronous motor using liquid speed control effect is remarkable.
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Επαγγελματίες κατασκευαστές ηλεκτροκινητήρων στην Κίνα
Ο κινητήρας Dongchun προσφέρει ένα ευρύ φάσμα ηλεκτρικών κινητήρων που έχουν σχεδιαστεί και κατασκευαστεί για να πληρούν τα διεθνή πρότυπα και να συμμορφώνονται με τις συγκεκριμένες απαιτήσεις των πελατών τους.
Η εταιρεία διαθέτει ένα εκτεταμένο χαρτοφυλάκιο προϊόντων που περιλαμβάνει μονοφασικούς και τριφασικούς κινητήρες AC, κινητήρες φρένων, κινητήρες μετάδοσης κίνησης και ειδικούς κινητήρες για προσαρμοσμένες εφαρμογές.
