Moog DS2110, Инструкция по установке и эксплуатации

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CHAPTER 5.0 Functional Overview 5-5
CDS7324 (FORMERLY LSF-0819)
Rev. A INSTALLATION & USER’S MANUAL
5.3.5 Regeneration Control
Rapid motor deceleration or an overhauling load creates a situation in which energy is returned back into the D.C.
Bus. The regeneration energy will charge up the power supply bus capacitors, causing their voltage to increase.
To prevent capacitor over voltage, a shunt regulator circuit senses when the bus voltage exceeds the
Regeneration cut-in voltage and switches a Regeneration resistor across the D.C..Bus, (via a Regeneration
transistor) to dissipate the Regeneration energy.
The Regeneration resistor is protected by software to limit the power delivered to the internal or external
Regeneration resistors. The software will limit the duty cycle of the transistor to protect the component with the
lower power ratings.
The Regeneration resistor control software allows the use to enter data for both the internal and external
regeneration resistors separately. The software then calculates the appropriate duty cycle for the regeneration
transistor. The available and actual regeneration powers are available to the user. If the regeneration power is
greater than 90% of the available regeneration power, the drive will display a Regeneration Power Warning (U4)
on the 7-segment display to indicate to the user that the drive is close to its maximum regeneration capability.
The Regeneration control can operate in one of five modes:
1. Regeneration Off:- In this mode, the regeneration transistor is not switched on and therefore the supply
must have the capability to absorb the regeneration power so that the bus voltage does not rise above the
upper limit.
2. Duty cycle controlled:- In this mode, the duty cycle calculated from the regeneration resistor data is used
to detemine the off times for the regeneration transistor from the on time parameters. The initial on time is
used from the first regeneration event until the initial on time has been consumed. After, this the
continuous on time is used to determine the regeneration off time. If regeneration is off for sufficient time
to allow the initial off time to run out, then the initial on time is used for the next regeneration event.
3. Duty cycle cont power fault:- In this mode, the regeneration duty cycle is controlled in the same
way as above, but a fault is detected if the average power exceeds the maximum power for the
regeneration resistor(s). This fault (regen max power exceeded) will cause the drive to disable and
transition to a fault mode.
4. Power fault only:- In this mode, the regeneration duty cycle is not controlled. The regeneration transistor
is switched on when the bus voltage rises above the regeneration turn-on voltage and is switched off
when the bus voltage falls below the turn-off voltage. The regeneration resistor is only protected by the
fault detection of the average power exceeding the maximum regeneration power.
5. Power warning only:- In this mode, the regeneration duty cycle is not controlled and the regeneration
resistor is not protected by the drive at all. The regeneration transistor is switched on and off as in the
‘power fault only’ mode above, but the fault detection is disabled. Only the regeneration power warning is
available to indicate that the regeneration is approaching its maximum capability.