Power Electronics VS65 Series User Manual

POWER ELECTRONICS
VS65
INTRODUCTION
13
o RC absorber circuit:
It provides instantaneous voltage protection circuit in order to reduce dV/dt surge voltage
and prevents the damage into the silicon controlled component.
o Trigger circuit:
It provides over 2A trigger pulses to ensure the dynamic voltage to be distributed
between the silicon controlled in series and in parallel stably. Both the trigger circuit and
the controlled silicon will be at the high voltage, which are separated from the control
board and the transformer by optical fibers.
o The controlled silicon high-voltage component are arranged in parallel and in series, the
practical quantity is depending on the motor’s voltage.
200A and 400A soft starter
Voltage Pairs in Series Total SCR Peak Voltage Ratio
2300V 1 6 6500V
3300 / 4160V 2 12 13000V
6600V 3 18 19500V
10-15kV 5 30 32500V
600A soft starter
Voltage Pairs in Series Total SCR Peak Voltage Ratio
2300V 2 12 7000V
3300 / 4160V 4 24 14000V
6600V 6 36 21000V
10-15kV 6 36 39000V
1.4. Operating Principle
The VS65 has a micro CPU as its control core that can start up and protect the motor. The CPU can
control and trigger the phase angle of SCR in order to reduce voltage applied to motor, and at next
step, by regulating the voltage and current applied on the motor slowly so that the motor torque can
be increased smoothly till the motor runs at full speed after acceleration ramp.
The starting mode can reduce the surge current at motor’s starting stage, decreasing impact on the
electrical grid and the motor itself. Meanwhile, it also can reduce the mechanical impact to the device,
increasing the equipment’s service life and avoid some fault and breakdown.
VS65 series can provide 3 types of starting mode:
 Voltage ramp starting mode:
The voltage ramp with current-limiting function is the factory configuration and the most
reliable starting mode that meets the most requirements. The initial torque should be set at a
value that just can drive the motor with the load to start. And then the voltage will be rise
smoothly, within a specified ramp time and starting current range till the motor runs at the full-
speed.
 Current-limited starting mode:
During the starting, the current is increased to the specified value rapidly till the motor runs at
the full speed.

Power Electronics VS65 Series Specifications

General

Brand	Power Electronics
Model	VS65 Series
Category	Controller
Language	English