1.1 GENERAL
High Power, High Speed, High Voltage Switch/Pulse Generator, HVC-
XXXX/QCW-USB are designedto drive many application in CW,QCW (Quasi
Continuous Wave), andNormalPulse mode.
HVC-XXXX/QCW-USB has a built-in high efficientH.Vpower supply and
communicates closely with the outputvoltage/current.
HVC-XXXX/QCW-USB has achieved QCW high power up to 30KV/500A, and
fastest rise time of 5ns-200ns.
For customer’s different load impedance, there is a special made stripline
available to avoid the reflection caused from mismatched impedance. This
stripline enablesthe distance fromthe unit to a customer’s load 1m
(standard),or 2m(optional) keepingthe rise time of 5ns-200ns &the
minimum pulse width of 5ns.
HVC-XXXX/QCW-USB QCWuses a double isolatedUSBinterface so that
user can control the LD driver through user’s PC control screens.
The isolated USB interface is isolated from the user’s computer as well as
fromthe HVC-XXXX/QCW-USBunit. This ensures the highestnoise immunity
even in the harsh industrial environment.
HVC-XXXX/QCW-USB also uses a high speed currentsensing device to
watch the real load currentas wellas a drive signalat the same time so that
user can monitor the real operatingcondition and compare with a drive signal.
1.2 DESCRIPTION
The high current/high power High VoltageSwitch HVC-XXXX/QCW-USB
uses a high frequency zero-currentswitching power supply to minimize a
switching loss and achieve high conversionefficiency in a smallbody (up to
5KWCW Power with air cooled, and 25KW with water cooled). This zero-
current switching technology has been used for Lic’s CO2 laser power supply
since 1986.
Complete protectioncircuits:
Unit contains the completeprotection circuits to protect theunit against any
potential risks. Therearetotal 9 protectioncircuitsinstalledin the systemand
these are explained in detaillater in this manual.
1). Power Supply Faults.
2). LD-Driver OverCurrent.
3). LD-Driver OverVoltage.
4). LD-Driver &Power supply Over Temperature.
5). Pulse-Frequency Fault.
6). Pulse-Width Fault (minimum& Maximum).
7). Pulse Duty Fault
8). Product of V.I.T fault (Vd Fault)
9). Interlock.
Accurate, high speed,andhighpowercurrent sense system:
The load current issensedwith an ultra small inductance andhigh power
resistor that accuracyis +/- 1%. To minimize the inductance, we use the same
technology thathas beenusedfor our LSP-series highspeedLD-Drivers.
