CZE MANUAL
17
118030-001 REV
F
4.3 High Voltage Circuits
The high voltage transformer is a step-up type. The
secondary of the high voltage transformer is connected to
the high voltage rectifier circuit. The rectifier circuit will
vary depending upon the rated output voltage. For lower
output voltage, a full bridge or doubler circuit is used.
For higher voltages, a half wave Cockroft-Walton
multiplier is used. A feedback signal is generated by the
high voltage resistor divider. This feedback signal is sent
to control circuits to provide voltage regulation and
monitoring. A current sense resistor is connected at the
low voltage end of the rectifier circuit. The circuit sense
signal is sent to the control circuits to provide current
regulation and monitoring.
In the SMS series, an auxiliary voltage sense signal is
generated by the overvoltage protection feedback resistor.
This is used to provide overvoltage protection.
The high voltage rectifier output is connected to an R-C
type filter to reduce high frequency ripple components.
The filter is then connected to the output limiting
resistors. These resistors limit the peak surge current in
the event an arc or discharge occurring. The limiting
resistor output is connected to the output cable or
connector provided.
4.4 Control Circuits
Control circuits are used for regulation, monitoring,
pulse-width, control, slow-start and inhibit control.
Feedback signals are calibrated and buffered via general
purpose OP-AMPS. Pulse width control is accomplished
by a typical PWM type control I.C. Logic enable/disable
is provided by a logic gate I.C. Regulators generate +/-
15V and 10VDC.
4.5 Polarity Reversal Circuits
The CZE1000 and CZE2000 polarity reversal circuits
operate as follows: A polarity reversal command is
given; at this point the output begins to decay. At a safe
level a high voltage relay switches to the opposite polarity
output section and ramps to its preset level.
4.6 Options
Due to the variations of models and options provided in
the CZE series, details of actual circuits used may differ
slightly from above descriptions. Consult Spellman’s
Engineering Department for questions regarding the
principles of operations for the CZE series.
Summary of Contents for CZE Series
Page 14: ...CZE MANUAL 6 118030 001 REV F Figure 2 1 CZE1000 Dimensions Connector Interface ...
Page 16: ...CZE MANUAL 5 118030 001 REV F Figure 2 2 CZE2000 Dimensions Connector Interface ...
Page 23: ...CZE MANUAL 13 118030 001 REV F Figure 3 5 CZE HV ON OFF Control ...
Page 29: ...CZE MANUAL 19 118030 001 REV F Figure 5 1 Floating Ground Interface Circuit ...