IndustrialDriveDataDrive Board & Diagnostic Database
Regeneration energy handling

VFD braking chopper and DC-bus discharge path

Routes excess DC-link energy into braking hardware or controlled overvoltage management during deceleration and overhauling-load events.

Functional path

Motor regeneration
DC link
Bus voltage sensing
Brake chopper command
Brake transistor
Brake resistor
Thermal protection

Diagnostic signals and checkpoints

Overvoltage on stopBrake resistor alarmChopper overheatOvervoltage on lowering load

Technician notes

  • Parameter configuration and hardware sizing must be considered together.
  • Open resistor wiring can look like a drive-control problem.
  • Common DC-bus systems need system-level energy balance.