In this comprehensive guide, we will deconstruct the inverter refrigerator circuit diagram, block by block, exploring the power supply, the logic control, and the variable frequency drive (VFD) that drives the compressor.
In an inverter refrigerator, the main control board never directly sends 230V to the compressor. It sends low-voltage DC signals to the inverter board, which then drives the compressor. Inverter Refrigerator Circuit Diagram
In the world of modern home appliances, the inverter refrigerator has revolutionized energy efficiency and noise reduction. Unlike traditional refrigerators that rely on a single-speed compressor (which turns ON/OFF abruptly), an inverter refrigerator uses a variable-speed compressor. This allows the appliance to run continuously at different speeds based on cooling demand. In this comprehensive guide, we will deconstruct the
[AC Mains Input (L,N)] | |---[Fuse]---[EMI Filter]---[Varistor] | +------------------------+ | | [Rectifier Diode Bridge] [SMPS Flyback Transformer] | | [DC Bus (+310V)] [Secondary Windings] | | [Smoothing Cap] [+12V Reg]---[+5V Reg] | | | +------------------------+-------[Microcontroller] | | [Intelligent Power Module (IPM)] | - IGBT High Side (U,V,W) | - IGBT Low Side (U,V,W) | | | +-----<--[Compressor U,V,W] | [Current Sensing Resistor (Shunt)]---(to MCU ADC for current feedback) In the world of modern home appliances, the
: Unlike standard fridges, the circuit takes 220V AC, converts it to high-voltage DC (around 325V) through a bridge rectifier, and then uses a 3-phase inverter driver to generate a custom AC frequency that controls the compressor's speed.
Before diving into the inverter-specific diagram, let's clarify the fundamental difference.