VFD 15/18 All Resistence And PF IC pakege
VFD 15/18 All Resistence And PF IC pakege 15/18 – All Resistors & PF IC Package Description ⭐ 1. Power Board پر استعمال ہونے والے اہم Resistors (A) High-Wattage Power Resistors (Startup / Pre-Charge Circuit) Component Value Watt استعمال Pre-Charge / Soft-Start Resistor 47Ω – 100Ω 10W یا 15W DC Bus Capacitors کو آہستہ چارج کرنے کے لیے Bleeder Resistor 150kΩ – 220kΩ 2W یا 3W DC Bus وولٹیج کو پاور آف کے بعد discharge کرنے کے لیے DC Bus Balance Resistors 1kΩ 5W Bus voltage balancing --- (B) SMD Resistors (Gate Drive / Feedback / Protection) Circuit Typical Values Function IGBT Gate Resistors 4.7Ω – 10Ω (1/4W SMD) Gate current limit & switching control Current Sense Feedback Resistors 0.01Ω – 0.1Ω (2W shunt) Motor current sensing Voltage Divider Resistors 100kΩ / 10kΩ pair DC Bus voltage reading Temp Sensor Bias Resistors 10kΩ Heatsink temperature monitoring --- ⭐ 2. PF IC (Power Factor Correction IC) Package & Description زیادہ تر INVT 15/18kW VF-D میں یہ IC استعمال ہوتا ہے: ➡ PF Controller IC: L6562 / L6562A Package: ✔ SO-8 (SMD) ✔ 8-Pin Package Pin Functions (Short Description) Pin No. Name Function 1 INV Input voltage sensing 2 COMP Loop compensation 3 MULT Multiplier input (AC waveform detect) 4 CS Current sense input 5 ZCD Zero current detector 6 GND Ground 7 GD Gate driver output (PFC MOSFET) 8 VCC +12V to +18V supply --- ⭐ 3. VFD میں PF Section کی Working (Short Notes) AC ان پٹ پہلے EMI filter → Bridge Rectifier جاتا ہے PF IC (L6562) PFC MOSFET کو Drive کرتا ہے Boost Inductor سے گزرتے ہوئے DC Bus 540V – 560V حاصل ہوتا ہے اس کے بعد یہ وولٹیج IGBT Inverter Stage کو ملتا ہے --- ⭐ 4. PF IC کے ساتھ استعمال ہونے والے ضروری Resistors Component Value Function Startup Resistor 330kΩ – 470kΩ (1W) PF IC کو ابتدائی Vcc دینا CS Resistor 0.22Ω – 0.33Ω (1W) Current sensing Gate Resistor 22Ω – 33Ω (1/4W) PFC MOSFET gate control Multiplier Divider 1MΩ + 330kΩ (SMD) AC waveform detection ---

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