Spellman X3645, Инструкция по эксплуатации

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DF/FF MANUAL 118002-001 R
ev B
4 PRINCIPLES OF OPERATION
The DF/FF series of high voltage power
supplies utilize sophisticated power
conversion technology. A variety of
analog, digital and power conversion
techniques are used throughout. The
intention of the Principles of Operation is
to introduce the basic function blocks that
comprise the DF/FF power supply. For
details on a specific circuit, consult
Spellman’s Engineering Department.
The DF/FF power supply is basically an
AC to DC power converter. Within the
power supply, conversions of AC to DC,
then to high frequency AC, then to high
voltage DC take place. By reviewing
further the sub-assemblies, a basic
understanding of the process can be
gained.
WARNING
:
The energy levels used and generated
by the power supply can be lethal! Do
not attempt to operate the power
supply unless the user has a sufficient
knowledge of the dangers and hazards
of working with high voltage. Do not
attempt to approach or touch any
internal or external circuits or
components that are connected or
have been connected to the power
supply. Be certain to discharge any
stored energy that may be present
before and after the power supply is
used. Consult IEEE recommended
practices for safety in high voltage
testing #510-1983.
4.1 LINE RECTIFICATION
AND FILTERING
Basic AC line rectification provides the
DC voltage for the high frequency
inverter and the filament supply.
The line input voltage can vary from 180
up to 253 volts within the series. In
general, the following variations can be
ordered.
200Vac
± 10%, 50/60Hz, 400Hz, three
phase or single phase.
/-10%, 50/60Hz, 400Hz, three
phase or single phase.
10%, 50/60Hz, three phase or
single phase.
400Hz exceed leakage current limits.
Other input voltages can be accommodated. If the
user is unsure of which input voltage option is
supplied, check the serial tag on the rear of the
power supply or consult Spellman Sales
Department.
Circuit protection is provided by fast
acting magnetic trip type circuit breaker
(CB1). The line voltage is connected
directly to the line side of the CB1. The
load side is connected to the input of the
EMI filter PWB. EMI filter reduces
conducted HF noise in mains. Output of
the EMI filter is connected to a contactor
(K1). K1 provides fail safe type
disconnection of the line voltage to power
supply rectification circuit. K1 is
controlled by variety of circuit conditions,
which includes safety features. The output
of the EMI filter is also connected to
AUX transformer that provides low
voltage AC power for generating auxiliary
supply DC voltages.