Kollmorgen BDS4 Series, Инструкция по установке и настройке

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C
HAPTER
1 - S
YSTEM
D
ESCRIPTION
BDS4
1-4
The shunt regulator also includes a duty
cycle limit circuit to protect against
excessive load resistor heating. If the
average duty cycle limit is exceeded, the
regeneration circuitry will become disabled,
the Fault Contact will open, and the
OVERLOAD LED will become illuminated.
To reset this fault, remove and reapply all
input line power; bus capacitors must
completely discharge.
•
50 and 75 AMP Models:
WARNING
The thermal overload output
contacts must be connected
into a shut down circuit (E
Stop string, etc.) to drop the
main power or a possible fire
hazard will exist. Refer to
Drawing A-93231.
The shunt regulator (regeneration) resistor is
protected by a thermal overload relay. If the
resistor rating is exceeded or if the shunt
regulator transistor fails, the thermal
overload output contacts will open
indicating an IMMEDIATE need to remove
the main power.
1.4.2 BDS4 Servo Amplifier Module
Refer to Figure 1.1 for a quick reference of the
BDS4's features.
The BDS4 Servo Amplifier is divided into four (4)
main sections:
1. Fault Diagnostics monitor various signal
leads. When a fault condition occurs the
fault circuit will become latched, the BDS4
will become internally inhibited, the
appropriate red LED will become
illuminated, and the Drive-Up contact will
open indicating that the BDS4 is in its
Inhibit mode.
2. The Input/Output interface circuitry is
divided into two functions:
(A) Signals to and from the motor and
BDS4.
These signals are associated with the
motor system resolver. A 7.0 kHz
excitation signal is generated in the
BDS4 and sent to the resolver. Two
resolver feedback signals (sine and
cosine) are received by the BDS4 and
processed by an R/D (resolver-to-
digital) converter. The R/D unit
generates a digital position word used in
electronically commutating the motor
and an analog velocity (internal tach)
signal to close the servo loop.
(B) Signals to and from the signal
source (PLC, CNC, etc.) and BDS4.
There are numerous signals that may
interface between the signal source
(PLC, CNC, etc.) and the BDS4. These
inputs and modes of operation differ
with each application.
3. The BDS4 consists of a single velocity loop
and three inner current loops. To give
precise velocity control, the velocity loop is
normally configured as a proportional, plus
an integral, plus a derivative gain servo loop.
The output of the velocity loop is the current
command for the three microprocessor-
based current loops.
The heart of the BDS4 is its microprocessor
which receives and processes the current
command (velocity error) signal from the
output of the velocity loop circuit, the
position information from the resolver-to-
digital converter, and several other signals.
After receiving the velocity error, the
microprocessor generates three sinusoidal
current commands. These current
commands are forwarded to the three
proportional plus integral current loops, one
for each of the three motor phases.
The microprocessor is the key element in the
Industrial Drives patented torque angle
technique. The microprocessor varies the
phase of the currents with respect to motor
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