This board is typically used in inverter welding machines like ARC welders and TIG welders, particularly models with 200A capacity.
Key Components and Features:
1. Toroidal Transformer (HS23971, 16:8)
Used for signal isolation and gate drive pulse transmission.
HS23971 is likely a custom or series identifier.
16:8 indicates the turns ratio (2:1), commonly used in driver transformers to step down/up the gate voltage.
2. MOSFET Driver Stage
This board likely drives 4 to 6 MOSFETs or IGBTs in a push-pull or half-bridge/full-bridge configuration.
Located beneath the transformer are driver ICs or optocouplers, likely used to deliver gate signals.
3. Resistors and Diodes:
Gate resistors (like R1–R8) control the switching speed of MOSFETs.
Flyback/protection diodes (D1–D12) protect the drivers and gates from voltage spikes.
These components are arranged symmetrically, indicating dual-channel drive (for two legs of an inverter bridge).
Purpose of This Board:
It interfaces between the control logic (microcontroller or PWM IC) and the power MOSFETs or IGBTs.
Isolates control and power grounds using a pulse transformer.
Ensures proper gate voltage and timing to drive high-power semiconductors in inverter circuits, such as:
TIG (Tungsten Inert Gas) Welding
ARC (Manual Metal Arc) Welding
Applications:
Inverter-based welding machines (200A range).
Switch-mode power supplies (SMPS) in industrial gear.
DC-AC inverters for power tools or motor drives.
Reviews
There are no reviews yet.