Fault protection – ElmoMC Gold Line Digital Servo Drives-Gold Tuba User Manual
Page 31
Gold Tuba Installation Guide
MAN-G-TUBIG-EC (Ver. 1.201)
31
DC bus during the period of motor deceleration, when there is a net energy outflow from the motor
to the servo drive, to prevent the servo drive from disabling itself as a result of an “over-voltage”
type reason.
When the capacitors charge-up reaches the predetermined shunt threshold level, the shunt
regulator begins its regulating action. The bus is regulated to the specific model type voltage, until
the regeneration-energy is dissipated.
7.3.3. Fault Protection
The Gold Tuba includes a duty cycle limiter, which inhibits shunt whenever On and Off time exceeds
2%. This feature protects the shunt regulator when high-inertia loads are driven by the servo
drive(s) or when too high AC voltage is applied to the power supply (i.e. DC output is already above
the threshold of the shunt).