Products

NBU-1012 discharge circuit

Discharge circuit for laser flash lamp powering

Applications

Discharge circuit for flashlamp operation

Features

Type – IGBT, free discharge
Flashlamp voltage – up to 1000 V
Flashlamp current – up to 1000 A
Pulse width – from 50 us to 100 ms
Max. average power – 2 kW
2-year guarantee (option)

Download manual (1.1MB)

The NBU-1012 discharge circuit is designed for simplification of solid-state laser systems development. The module forms quasi-rectangular pulses on a flashlamp (using energy stored in an external capacitor bank) and provides simmer current during the interval between pulses. By default, NBU-1012 includes capabilities both for serial and external triggering.

The flashlamp operating frequency and pulse duration is to be varied by +5 V TTL signal from an external control device to the respective pin.

The module includes IGBT, its driver, protective circuits, simmer and trigger circuits, discharge resistors and controls. It also contains a fan for active cooling.

Let us emphasize, the discharge circuit NBU-1012 is not a stand-alone solution. For proper operation it requires capacitor charging power supply and capacitor bank, an external control device to form the pulses, external +24 V DC power supply, as well as some minor parts (see also the picture below).

Simplified as well as more complicated modifications are available on request. We have also serial simplified model NBU-0808 discharge circuit, up to 800V, a bit less power output but interesting price.

+24VDC Input:

Voltage

+24 V DC

Current consumption

5 A max, up to 10 A peak

Pulse parameters:

Max. voltage

1000 V (other on request)

Max. discharge current (depends on flashlamp impedance K0)

1000 A for pulse width < 1 ms
500 A for pulse width > 1 ms
(other on request)

Max. average power

2000 W (other on request)

Min. pulse width
max. pulse width

Accordingly to PWF:Pulse signal

Max. rep. rate

100 Hz (up to 200 HZ on request)

Recommended wires:

For capacitor bank connections

FLEXI-2V or similar (> 1000 V rated voltage, > 4 mm² cross-section), short length (30 cm recommended)

For flashlamp connections

for external triggering – FLEXI-2V or similar (> 1000 V rated voltage, > 4 mm² cross-section)
for serial triggering additional insulation (e.g. with silicone tubing) or spacing (e.g. with spiral bundle hose) of L– wire is required

Simmer parameters:

Voltage

up to 300 V

Open circuit voltage

about 1500 V

Current

500 mA (100-800 mA on request)

Max. output power

100 W

Flashlamp triggering parameters:

Trigger pulse width

~ 1 us

Restrike rate

a few Hertz (automatically adjusted)

External triggering:

Pulse energy / trigger voltage

~20 mJ / 350 V positive to the EXT connector (other on request)

Trigger transformer

external transformer (purchased separately)
Recommended p/n ZS1324-24V LUL1(H) by Excelitas Technologies (Digikey p/n ZS1324-24VLUL1(H)-ND)

Serial triggering:

Pulse energy / trigger voltage

~160 mJ / 10 kV negative to L- (other on request)

Trigger transformer

integrated transformer

Environment:

Cooling

forced air cooling with built-in fan

Operation temperature

0 … +40 °C

Storage temperature

-20 … +60 °C

Humidity

0 … 90%, non-condensing

Other:

Protections

from overheating of internal components

Size (LxWxH)

225x207x62 mm

Weight

2.0 kg

The following options are available on request:

Integrated current sensor
High power / current / voltage thyristor with extended parameters
Digital RS-232 / RS-485 interface
Modified cables
Modified simmer and / or triggering parameters

Modifications

Model

Description

NBU-1012

NBU-1012 discharge circuit with
capability of both serial and external flashlamp triggering

Example