Schulz-Electronic Advice LCH1510 Series User manual
Project –LCH1510-XXX
Date
16-08-2020
Doc No
1700-UM00-10
Rev
A
Written by
I.Zuker
Approved
by
Shlomo Ostrovski
Page 1
User Manual for:
Capacitor Charging Power Supply model
LCH1510-XXX
ADVICE Part Number –LCH1510-XXX
Revision History
Change Description
ECO No.
Date
Approved by
A
Document Issue date
16.08.2020
I.Zuker
Your contact:
Page 2
Table of contents
Description of the LCH1510-XXX Capacitor Charging Power Supply........................3
Symbols explanation..................................................................................................3
LCH1510-XXX Capacitor Charging Power Supply Specification................................4
Input........................................................................................................................4
Output Voltage & Current........................................................................................4
Environmental Specifications..................................................................................4
Safety Regulation & EMC Specifications ................................................................4
Mechanical Dimensions..........................................................................................4
User interface signals detailed description.................................................................5
LCH1510-XXX Capacitor Charging Power Supply block diagram..............................6
LCH1510-XXX typical application in laser-based systems.........................................6
Warnings....................................................................................................................8
LCH1510-XXX Installation..........................................................................................9
LCH1510-XXX Service.............................................................................................10
LCH1510-XXX outline drawing.................................................................................10
Page 3
Description of the LCH1510-XXX Capacitor Charging Power Supply
Advice model LCH1510-XXX is an OEM Capacitor Charging Power Supply used
mainly for laser systems. It operates from the mains line, and delivers power for
charging capacitors, with an average power output of 1,500 Joules per second.
Model LCH1510-XXX is part of a large family of Capacitor Charging Power Supplies
ranging from 750J/S up to 9,000J/S, with output voltages from 400V up to 1,500V,
when XXX denotes the output voltage in tens of volts, for example, 060 denotes a
charging power supply of 600V.
Using Advice's QCP (Quasi-Constant-Power) technology, Advice Capacitor
Chargers deliver constant current to the capacitor during the first fraction of the
charging process, then it delivers constant power until the capacitor voltage reaches
the desired set voltage. This strategy has several advantages over constant current
designs offering lower components stress, lower weight, improved reliability and
more competitive products.
The unit is cooled by means of an internal fan.
The Capacitor Charger has a 15 D-Type connector for user interface, comprising an
auxiliary voltage of 15V. The signals are referenced to the negative lug of the high
voltage output.
The output lugs may carry high voltages and must be handled with proper caution in
order to avoid electrical shock which may be life threatening.
Units can be ordered either with the negative lug of the high voltage output tied to
the Protective earth or floating.
Symbols explanation
Hazard: This Capacitor Charger unit produces high
voltages which may cause electrical shock and may be
lethal.
Electrical Shock Hazard: This Capacitor Charger unit
produces high voltages which may cause electrical shock
and may be fatal.
Do not open the unit and do not service the Capacitor
Charger. Only Advice Electronics Ltd. personnel are
qualified to service this Capacitor Charger.
Only qualified personnel are allowed to install this
Capacitor Charger.
Page 4
LCH1510-XXX Capacitor Charging Power Supply Specification
Input
Input Voltage
90-264VAC
Frequency
47-63Hz
Initial Inrush current
<25A
Power Factor (typical, at full load)
0.99
Efficiency (typical, at full load)
88% at 220Vac
Max. Input Current
12A at 220VAC input voltage
Output Voltage & Current
Output Voltage
User controllable from 20% to 100% of Vmax.
Average Power (Maximum)
1,500W
Line Regulation (Maximum)
0.1%
Load Regulation (Maximum)
0.5%
Ripple & Noise (Max @ 20 MHz bandwidth with
1uF ceramic capacitor and 10uF capacitor
connected in parallel on the measuring point)
≤2% p-p
Output Voltage Accuracy
1% of setting from 20% of Vmax. to 100% of Vmax.
Charge Time –max'
According to Vmax, Please refer to the specific model specification
Over Temperature Protection
Shutdown, automatically recovers when the temperature decreases
Output Grounding
Negative output shorted to Protective Earth
Environmental Specifications (Designed to meet when installed within the 19", 3U drawer)
Operating Temperature
0C to +40C
Storage Temperature
-20C to +60C
Cooling
By an internal fan
Humidity
10% to 90% RH non-condensing
Safety Regulation & EMC Specifications (Designed to meet when installed within the 19", 3U
drawer)
EMI
EN 55011 Class A , Group 1 (without external filter)
Insulation
Input to chassis: 1,750Vac. Input to SELV Circuit : 4,000Vac
Safety
cTUVus, EN 60601-1 3rd edition and CE Mark
Leakage Current to Protective Earth
<120uA
Mechanical Dimensions
Size L x W x H in Inches (mm)
12.75 x 5.75 x 4.10 (324 x 146 x 104)
AC Input Connector
Terminal Block, 2 positions
AC Earth
10-32 GND stud, use at least 14AWG wire
HV Output Connector
MHV Male / coax cable rated at least 150% of max. rated output voltage
Interface Connector
15 pin D-type (female)
Weight
4Kg Maximum
Page 5
User interface signals detailed description
Remark: the levels of the signals in pins 2, 3, 4, 6 and 13 are:
Low state: <1V for 20mA current (darlington Vce sat)
High state: 10KOhm pull-up resistor to +15V
Pin #
Signal
Remarks
1
Inhibit (Charge/Standby )
Turn the output On and Off by electrical signal or dry contact:
0V-0.6V or Short to GND: HV output is On (Charge)
15V (or Open): HV output is Off (Standby)
Remarks:
1. There is an internal 5KΩpull-up to 15V
2. Inhibit polarity can be inverted (factory set)
2
Power fault
Low in case of power fail, normally high (15V)
3
Sum Fault
Pulled low in case of an internal fault/s, normally high (15V)
4
HVON
Pulled low when the unit is enabled (Inhibit input low) and there is no internal
fault
5
Voltage Program
Positive input voltage 0 to 10V accordingly controls the output voltage from
up to 100% of the rated output voltage. Input Impedance: approx. 100KΩ
6
Fault Indication
Output rise time is measured:
If the rise time>approx. 6 Sec., a malfunction is assumed and an “Active
LOW” indication is provided from an open collector (rated to 30V/10mA) and
the output voltage is shut down.
The input supply voltage needs to be recycled to restart.
7
Vo Monitor - Peak
0V to 10V for 0 to Vout max. (peak measurement, decaying with a time
constant of 20 Sec.) Drive capability: 1.5mA (through 200Ω)
8
Vo Monitor - Instantaneous
0V to 10V for 0 –Vout max. Drive capability: 1.5mA (through 200Ω)
9, 11, 12
15V Reference
15V±5%, up to 100mA output
10
Not connected
13
End of Charge Indication
Provides “LOW” indication when the load capacitor reaches the set voltage,
otherwise it is "HIGH" (15V)
14, 15
Signals ground
All the signals in the connector are referred to this ground, which is shorted
internally to the high voltage output negative line, and to the chassis
(Protective Earth)
Page 6
LCH1510-XXX Capacitor Charging Power Supply block diagram
LCH1510-XXX typical application in laser-based systems
MAINS
IN
USER
INTERFACE
USER
INTERFACE
SIGNALS
POWER
FACTOR
CORRECTION
CONVERTER
POWER
CONVERTER
CONTROL
OUTPUT
AUXILIARY
POWER
SUPPLY
OUTPUT
RECTIFIER
AND FILTER
HIGH
VOLTAGE
POWER
CONVERTER
INPUT
FILTER
POWER
FACTOR
CORRECTION
CONTROL
FLASH LAMP
H.V. CAPACITOR
MAINS
System Control
+TRIG
-TRIG
INHIBIT
END OF CHARGE
VOLTAGE PROGRAM
VO MONITOR INST.
SUM FAULT
SIGNALS GROUND
SCR
Capacitor Charger
PHASE
NEUTRAL
PROTECTIVE EARTH
+OUT
-OUT
SIGNALS GROUND
SUM FAULT
VO MONITOR INST.
END OF CHARGE
VOLTAGE PROGRAM
INHIBIT
INDUCTOR
AC IN
Page 7
The above diagram depicts a typical laser-based system with a controller connected
to the capacitor charger, which in turn drives a flash lamp through a pulse forming
network (PFN) comprised by a high voltage capacitor discharging through an
inductor into the flash lamp for achieving a high intensity flash.
There are additional applications but this section describes only the main application
of driving a flash lamp in order to achieve a laser shot.
In case there is any doubt about any application, please apply to your local Advice
Electronics Ltd. Representative, and they will be glad to assist.
The capacitor charger charges the high voltage capacitor, then the controller turns
on the SCR by inducing a short pulse through the transformer which offers also
insulation from the high voltage. Once the high voltage capacitor transferred its
energy to the flash lamp and the flash has been achieved, the current decreases and
the SCR turns OFF and the high voltage capacitor may be charged again for the
next flash.
It is highly recommended to connect a high voltage reverse protective diode in
parallel to the high voltage capacitor (with is anode connected to the –OUT and its
cathode to the +OUT).
In order to drive a flash lamp for achieving a laser shot, the controller will typically
perform the following sequence:
a. The controller sets the desired voltage by accordingly applying a voltage in
the "VOLTAGE PROGRAM" pin of the interface connector (pin 5).
b. The controller checks the capacitor charger status through signal "SUM
FAULT", making sure it is in "high" state, indicating the capacitor charger has
no faults and is ready to operate.
c. The controller activates the "INHIBIT" signal, which initiates the high voltage
capacitor charging process.
d. The controller waits until an active signal "END OF CHARGE" is received,
indicating the capacitor charger has charged the high voltage capacitor to the
desired voltage. It may check the "VO MOITOR INSTANTANEOUS" analog
signal as a means of double-check.
e. The controller de-activates the "INHIBIT" command signal, inducing the
capacitor charger into an idle state.
Note: In this kind of application the user must take care to de-activate the
"INHIBIT" command signal prior to discharging the load capacitor.
Otherwise the capacitor charging power supply will keep on delivering
energy during the discharge and may be disturbed by the capacitor high
energy discharge pulse.
Page 8
f. The controller drives the transformer with a pulse, triggering the SCR, which
in turn allows for the discharge of the high voltage capacitor into the flash
lamp through the inductor which assists in shaping the pulse form. This
discharge causes the desired flash in the lamp.
g. The controller may wait a fixed amount of time during which it is assumed that
the high voltage capacitor has discharged and the lamp current is zero,
meaning that the SCR is OFF, or it may check the "VO MOITOR
INSTANTANEOUS" analog signal in order to make sure the capacitor has
indeed discharged.
h. At this point, the system is ready for the next flash, which may be carried out
by reassuming the sequence from stage "b" (assuming the "VOLTAGE
PROGRAM" signal has been kept constant).
Warnings
Hazard: Do not use this Capacitor Charger in presence of
flammable materials, vapors, gases, explosives or nitrous
oxide as this may initiate burning or cause an explosion.
Hazard: Do not use this Capacitor Charger in presence of
oxygen, flammable anesthetic gases, vapors or nitrous
oxide as this may initiate burning or cause an explosion.
Hazard: This Capacitor Charger should be used only as
part of laser or medical equipment, and there should not
be any contact between its connections and personnel
or patients. Equipment manufacturer must provide an
isolation between this Capacitor Charger and personnel
or patients who may be in contact with its equipment.
Page 9
LCH1510-XXX Installation
Advice Capacitor Charging Power Supply model LCH1510-XXX is intended for
installation in laser systems for charging capacitors, for driving flash lamps.
Please follow the following guidelines:
Only qualified personnel (Engineers, technicians or qualified assemblers)
may install this capacitor charger into laser-based systems.
Only qualified Advice Electronics Ltd. personnel may open or service this
capacitor charger.
There are no serviceable components or parts within this capacitor charger.
In order to correctly connect and integrate this capacitor charger into a laser-based
system, please follow the following recommendations:
a. For connecting the mains lines, use cables of AWG#14 or thicker.
b. For connecting the Protective Earth to the 10-32 GND stud, use a cable of
AWG#14 or thicker.
c. For connecting the user interface signals use a standard, two rows 15 pin
male D-type connector, typically with wires AWG#22 or AWG#24.
d. For connecting the high voltage output, depending on the option ordered,
please use high voltage coax cable, or a pair of wires AWG#18 or thicker,
rated for at least 150% the rated voltage of the capacitor charger model.
e. For mounting the capacitor charger in the laser-based system, refer to the
location of the four holes intended for mounting screws in the outline drawing.
f. The capacitor charger is cooled by an internal fan. Please take care to keep a
clearance of at least 5cm from both sides of the unit (air intake and air
exhaust). The air intake should be provided with cool air at ambient
temperature, while the exhaust air should be routed outside the user's system.
Page 10
LCH1510-XXX Service
Only qualified Advice Electronics Ltd. personnel may open or service this
capacitor charger.
LCH1510-XXX outline drawing
For service information please apply to your local Advice Electronics representative,
or contact:
Advice Electronics Ltd. 16 Atir Yeda, Advice building, Kfar Saba 4464321, Israel
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