General Characteristics; General Description - Santerno DCREG2 Series User Manual

DCREG2
DCREG4
3

GENERAL CHARACTERISTICS

3.1

GENERAL DESCRIPTION

APPLICATION
SUPPLY
AIR-COOLING
OVERLOAD CAPACITY
CONTROL
SPEED REACTION
The devices of the DCREG series are AC/DC drives with fully digital control
system. They fit the armature and field supply of direct current motors to
enable the speed or torque control. DCREG4 operates in four quadrants, while
DCREG2 operates in two quadrants.
Control section: from 380...500 Vac single-phase alternate voltage (or
200...240 Vac on request), tolerance +10/-20% taken directly from the power
supply three-phase voltage, or differing from it, and not necessarily in phase
with it. Alternatively, with a 24 Vdc direct voltage, tolerance may be +15/-10%
with no hardware adjustment.
Armature section: from three-phase alternate mains or a 10...440 Vac
generator unit (by request: 10...500 Vac or 10...690 Vac). Tolerance is +10%
on the maximum applicable voltage, or +20% on rated voltage (C030), should
the former tolerance be larger than the latter. Tolerance is -15% over rated
voltage with DCREG4, and -20% over rated voltage with DCREG2. Frequency
is 50/60 Hz. Phase sequence insensitiveness of power phases.
Field regulator, from 200...500 Vac single-phase alternate voltage +10/-20%.
Supply frequency is 50/60 Hz.
Natural with vertical airflow up to DCREG.40, forced ventilation from the
DCREG.70 version on. Possibility of THROUGH PANEL assembly for all
sizes.
Current limit increasing capacity up to 150% of the nominal value. The max.
overload cycle determining the alarm protection trip consists of a 150% current
overlimit lasting for 1 minute. It can be performed with a 1:10 duty-cycle.
Fully digital with feedback double loop, inner adjustment for the current control
and external adjustment for the voltage / speed control. Equipped with two
micro controllers: one of them is specially designed to perform the current loop
and offers the possibility of choosing between a PI-type regulator or - in case
of a DCREG4 type only - a predictive algorithm to achieve a more dynamic
response. Adaptive speed regulator and automatically variable parameters
according to the speed error. Two sets of regulation parameters available for
the speed loop, referring to two possible different situations of the motor (i.e.
the mechanical time constant, the reduction ratio, the inertial moment, etc.).
From tacho, enP/Nr, or armature feedback. Possibility of automatically
switching to the armature feedback in case of failures.
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