IndustrialDriveDataDrive Board & Diagnostic Database
Functional board area

Generic VFD Auxiliary SMPS Board Area

Generates logic, relay, fan and local electronics supplies from the drive DC bus or auxiliary input.

Record status

IdentifierGeneric functional record; exact board identity requires model and board markings
Record typeFunctional board area

Observed functional elements

Startup resistorSMPS controllerSwitching transistorOptocoupler feedbackSecondary rectifiersElectrolytic capacitors

Diagnostic use

  • No-display triage
  • Pulsing low-voltage rail investigation
  • Control-board repair boundary definition

Linked circuit records

Circuit
VFD auxiliary SMPS and control-power path

Maps the auxiliary supply route that powers the CPU, keypad, I/O, relay logic, fan control and often isolated driver supplies.

Open →