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Home Flashlamp driving IGBT Discharge Circuit NBD‐0505‐PWM Discharge Circuit

NBD‐0505‐PWM Discharge Circuit

NBD-0505-PWM is a discharge circuit with PWM (Pulse Width Modulation) technology implemented. It forms on the flashlamp true-rectangular pulses with the characteristics as below:

  • Flashlamp voltage – up to 500 V
  • Flashlamp current – up to 500 A
  • Pulse width – from 1 msec to 100 msec
  • Max. average power – 2 kW

Module includes embedded inductance coil (80μH) and small capacitor bank (2mF/800V) as well as simmering and triggering circuits.

Free-discharge functionality with 800V/800A characteristics is also available either as a separate output (by default) or as an operating regime (on request).

Description

NBD-0505-PWM discharge circuit is designed for use in high power IPL and long pulse Nd:YAG, KTP, Alexandrite laser systems. Module forms flashlamp pulses of rectangular or quasi-rectangular shape using the energy stored in external capacitors bank. Module includes IGBT, its driver, protective circuits, simmering and triggering circuits, discharge resistors and controls.

The unique feature is advanced current control (PWM), which makes true rectangular pulses possible (see oscillogram below for a typical waveform).

Let us emphasize that NBD-0505-PWM is not a stand-alone solution. For proper operations it requires capacitor charging power supply and capacitor bank as well as some minor parts and controls (see also the picture below).

Technical Specifications

INPUT
Low Voltage +24 VDC
High Voltage Capacitor bank connection; Note: module already embeds 2mF/800V capacitor bank
OUTPUT #1 (PWM)
Max. voltage 500 V
Max. current 500 A
Max. average power 2 kW
Pulse width 1 msec to 100 msec
Embedded inductance coil 80 μH
OUTPUT #2 (Free Discharge)
Max. voltage 800 V
Max. current 800 A
Max. average power 2 kW
Pulse width 50 μsec to 10 msec (other on request)
SIMMER PARAMETERS
Voltage up to 300 V
Open circuit voltage about 1500 V
Current 300-800 mA (500 mA by default)
TRIGGERING PARAMETERS
Triggering method Serial only by default Parallel or both on request
Voltage Serial – 10kV/~160mJ negative to LParallel, on request – 350V/~20mJ negative to EXT connector
Pulsewidth ~1 μsec
Restrike rate a few Hz (automatically adjusted)
ENVIRONMENT
Operation temperature 0…+40°C
Storage temperature -20…+60°C
Humidity 90%, non-condensing
OTHER
Size (LxWxH) 275x260x145 mm
Weight 5.0 kg

Options

  • On request the next options are available:
  • High power / current / voltage IGBT with extended parameters
  • Digital RS-232 / RS-485 interface
  • Different cables
  • Different simmering and/or triggering parameters

How to Order

Modifications by Flashlamp Triggering Type
Model Description
NBD-0505-PWM NBD-0505-PWM discharge circuit with
two outputs – one for true-rectangular
pulses (PWM), the other for quasirectangular
pulses (Free discharge)

Downloads

nbd-0505-manual-en
nbd-0505-manual-en-1.pdf (809 KB)