شرح مفصل لمبدأ العمل من العاكس عالية التردد

26,Mar,2026

مشاهدات الصفحة:

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الأجهزة الكهربائية العاكس عالية التردد هي نوع من معدات التبديل المستخدمة في المجال الصناعي. ما هو مبدأ عمل المحولات عالية التردد ؟ يتم التحكم في هذا الجهاز عن طريق منطق البرنامج. يمكن استخدام العاكس عالي التردد في صناعة الاتصالات وهو جهاز تبديل في غرف الكمبيوتر. يمكن استخدام هذا النوع من إمدادات الطاقة في صناعة الطاقة الشمسية وصناعة توليد الطاقة. إنه جهاز إمداد طاقة التبديل الذي يستخدم إخراج خط البيانات وهو آمن للغاية. تقدم هذه المقالة بشكل أساسي مبدأ عمل العاكس عالي التردد والفرق بين العاكس عالي التردد والعاكس منخفض التردد. اتبع المحرر لمعرفة المزيد.

العاكس عالي التردد هو محول DC إلى AC. إنها في الواقع عملية انعكاس الجهد مع محول. مبدأ عمل العاكس عالي التردد هو أن المحول يحول جهد التيار المتردد لشبكة الطاقة إلى خرج ثابت 12V DC ، بينما يحول العاكس خرج الجهد 12V DC بواسطة المحول إلى طاقة تيار متردد عالية التردد وعالية الجهد ؛ كلا الجزأين متساويان تم اعتماد تقنية تعديل عرض النبضة (PWM) المستخدمة على نطاق واسع. الجزء الأساسي منه هو وحدة تحكم متكاملة PWM ، ويستخدم المحول UC3842 ، ويستخدم العاكس شريحة TL5001. نطاق الجهد التشغيلي لـ TL5001 هو 3.6 ~ 40V. وهي مجهزة بمكبر للخطأ ، ومنظم ، ومذبذب ، ومولد PWM مع التحكم في المنطقة الميتة ، ودائرة حماية الجهد المنخفض ودائرة حماية ماس كهربائى.

  1. جزء اتصال الإدخال: يحتوي جزء الإدخال على 3 إشارات ، VIN للإدخال DC 12V ، يعمل على تمكين الجهد ENB وإشارة التحكم الحالية للوحة DIM. يتم توفير VIN بواسطة المحول ، ويتم توفير جهد ENB بواسطة MCU على اللوحة الأم. قيمته 0 أو 3 فولت. عندما ENB = 0 ، لا يعمل العاكس ، وعندما يكون ENB = 3V ، يكون العاكس في حالة عمل عادية ويتم توفير جهد DIM بواسطة اللوحة الأم ، يتراوح نطاق الاختلاف بين 0 ~ 5V. يتم تغذية قيم DIM مختلفة إلى محطة التغذية الراجعة لوحدة التحكم PWM. سيكون التيار الذي يوفره العاكس للحمل مختلفًا أيضًا. كلما كانت قيمة DIM أصغر ، كلما كان الإخراج الحالي بواسطة العاكس أصغر. الاكبر.

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    2. دائرة بدء الجهد: عندما تكون ENB على مستوى عالٍ ، فإنها تنتج جهدًا عاليًا لتضيء أنبوب الإضاءة الخلفية للوحة. تحكم PWM: لديه الوظائف التالية: الجهد المرجعي الداخلي ، مضخم الخطأ ، المذبذب و PWM ، حماية الجهد الزائد ، حماية الجهد المنخفض ، حماية الدائرة القصيرة ، وترانزستور الخرج.

  2. 4. تحويل التيار المستمر: تتكون دائرة تحويل الجهد من أنبوب تبديل MOS ومحث تخزين الطاقة. يتم تضخيم نبضة الإدخال بواسطة مضخم دفع وسحب ويدفع أنبوب MOS لأداء إجراءات التبديل ، بحيث يقوم التيار المستمر بشحن وتفريغ المحث ، بحيث يمكن للطرف الآخر من المحث الحصول على جهد التيار المتردد.

  3. 5. LC التذبذب ودائرة الإخراج: ضمان 1600V الجهد المطلوب لبدء المصباح ، وخفض الجهد إلى 800V بعد بدء تشغيل المصباح.

  4. 6. ردود فعل الجهد الناتج: عندما يعمل الحمل ، يتم تغذية الجهد أخذ العينات مرة أخرى لتحقيق الاستقرار في الناتج الجهد العاكس.

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