POWER SOURCE FOR ELECTRON BEAM MELTING

Upto 15kW

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POWER SOURCE FOR ELECTRON BEAM MELTING 

Upto 15kW

IONICS has designed, developed and supplied regulated power supplies for Electron Beam Melting equipment using the transformer-rectifier topology.

The entire power source consists of the following:

TECHNICAL SPECIFICATIONS

PARAMETER SPECIFICATION
Input Voltage 415V ±10% A C, 50Hz, three phase
Ambient temperature 40˚C
Method of cooling Air-cooled
Type of Transformer Epoxy cast dry type rectifier transformer
Duty Continuous operation
Installation Indoor
Protections Input HRC fuses
Single phasing preventer
Harmonic filter at the mains input
Thermal overload relays
Linear reactor for limiting short circuit current
Digital Monitoring Acceleration voltage – 0 to -15kV DC average
Beam current – 0 to 1A DC mean
Controls & Signals on Control Panel Push buttons for ON/ OFF
10 turn potentiometer for voltage, current control
LED indications for ON/ OFF, fault status
Construction The unit is to be divided into three parts viz.,
The transformer cubicle, control cubicle and control console
ACCELERATIO N VO LTAGE SUPPLY
Output Voltage Range -0.5kV DC to -15kV DC average
Output Current Range 0 to 1A mean
Line Regulation Upto 4% for 10% variation in input voltage
Load Regulation Upto 4% for 0 to 100% load variation
Stability < 10%
Ripple at frequencies ≤ 1 kHz Upto 4% rms of set value – within working range
Resolution 0.5kV for voltage and 10mA for current
Protections* Against over load, over current, over voltage, over watts and short -circuit. During short circuit power supply trips
FILAMENT HEATING SUPPLY (EHT INSULATED)
Output Voltage Range 0 to 7V AC rms
Output Current Range 0 to 40A
Insulation Level This supply will be floating at -15kV DC
Protections The power supply will incorporate trip circuit for over current fault.
Topology Thyristorised primary controller followed by single phase step down transformer, independent close loop control
FOCUSING SUPPLY
Output Voltage Range Upto 70V DC
Output Current Range 0 to 1A
Ripple ≤ 0.1%
Resolution 1mA
BEAM OSCILLATIO N SUPPLIES (X & Y) 2 SETS
Output Voltage Range 0 to 10V A C sinusoidal
Output Current Range 0 to 1A (max) continuously variable by multi-turn potentiometer.
Frequency Variable from 3Hz to 50Hz, sinusoidal and saw tooth with selector switch
Phase Shift* Adjustable phase shift of 0 – 180˚ between the two sets of output
Line Regulation Upto 0.1% for 10% variation in input voltage
Load Regulation Upto 0.1%
BEAM DEFLECTIO N SUPPLIES (X & Y) 2 SETS
Voltage 0 to 5V DC
Current 0 to 0.5A (max) continuously variable by multi turn potentiometer.
Polarity Positive / negative (selectable through switch)
Line Regulation Upto 0.1% for all changes in line voltage of ±10%
Load Regulation Upto 0.1%
Ripple < 1mV rms
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