المعلمات الرئيسية لمحول التردد المنخفض

أخبار الشركة | اختناقات الوضع المشترك | اخبار الصناعة | محول|RJ45 connectors

1. نسبة الجهد

قم بتعيين عدد مجموعتين من low-frequency محول ملفات مثل N1 و N2 ، N1 هي الملف الأساسي ، N2 هي الملف الثانوي.
يتم تطبيق جهد التيار المتردد على الملف الأولي ويتم إنشاء قوة دافعة كهربائية مستحثة عند طرفي الملف الثانوي.
When N2>N1, its induced electromotive force is higher than the primary voltage added, this low-frequency محول is called boost low-frequency محول.

كفاءة 2.

At rated power, the ratio of the output power to the input power of the low-frequency محول is called the efficiency of the low-frequency محول, that is, η=P2/P1×100%.
Where η is the efficiency of the low-frequency محول, P1 is the input power and P2 is the output power.
When the output power P2 of the low-frequency محول is equal to the input power P1, the efficiency η is equal to 100%, at this time the low-frequency محول will not produce any loss, but in fact this low-frequency محول does not exist, low-frequency محول transmission power always produce loss, this loss mainly copper loss and iron loss.
The efficiency of the low-frequency محول is closely related to the power level of the low-frequency محول. Usually, the greater the power, the smaller the loss and the higher the efficiency.
على العكس من ذلك ، كلما انخفضت الطاقة ، انخفضت الكفاءة.

3. تردد العمل

Because the low frequency محول core loss and frequency is very important, it should be designed and used according to the frequency of use, this frequency is called the working frequency.

4. الفولطية المقدرة

This parameter refers to the voltage allowed to be applied on the primary winding of the low-frequency محول. The voltage applied on the primary winding of the low-frequency محول shall not be greater than the specified value in normal operation.

5. القوة المصنفة

Rated power refers to the low frequency محول in the specified frequency and voltage, can work for a long time, and does not exceed the specified temperature rise of the secondary output power.
The unit of rated power of low-frequency محول is VA(volt ampere), instead of W(watt). This is because there will be part of reactive power in the rated power, so it is more accurate to express VA.

6. لا يوجد تحميل الحالي

When the low-frequency محول secondary winding open, there is still a certain current in the primary coil, this current is called no-load current.
يتكون تيار عدم التحميل من تيار ممغنط (توليد تدفق مغناطيسي) وتيار فقدان الحديد (الناجم عن فقدان النواة).
بالنسبة إلى low-frequency محول with 50Hz power supply، فإن تيار عدم التحميل يساوي أساسًا تيار المغنطة.

7. لا خسارة الحمل

When the low-frequency محول is open in the secondary, the power loss measured in the primary is the no-load loss.

8. مقاومة العزل

This parameter represents the insulation performance between each coil of the low-frequency محول and between each coil and the iron core.
ترتبط مقاومة العزل بأداء ودرجة حرارة ورطوبة المادة العازلة المستخدمة.
Insulation resistance is a parameter that represents the insulation performance of low-frequency محول. It is the ratio of voltage and leakage current applied on the insulation layer, including the insulation resistance value between windings, windings and core and shell.
نظرًا لأن مقاومة العزل كبيرة جدًا ، فيمكن عمومًا استخدام مقياس ميغا أوم (أو كتلة متعددة R × 10kΩ) لقياس مقاومتها.
If the insulation resistance of the low-frequency محول is too low, the case may be charged in use and even the low-frequency محول winding may be broken down and burned.

9. ارتفاع درجة حرارة
When the low-frequency محول is put into operation, the part where the coil temperature is higher than the ambient temperature is called the coil temperature rise.
يسمى الجزء من القلب الذي تتجاوز فيه درجة حرارة التشغيل درجة الحرارة المحيطة بارتفاع درجة حرارة النواة.
هناك نوعان من ارتفاع درجة الحرارة: أعلى ارتفاع في درجة الحرارة وارتفاع متوسط ​​درجة الحرارة.
Generally, the average temperature rise of the coil is taken as the temperature rise index of the low-frequency محول.
Temperature rise is an important factor affecting the life of low-frequency محول.
The allowable temperature rise of a low-frequency محول is determined by its insulation and heat resistance class.