Capacitor Charging Technology; Continuous Dc Operation; Additional Features - TDK-Lambda 203 Operator's Manual

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
Powering lasers: Excimer, flashlamp pumped dye, Yag, CO

Line type modulators for RF generation and pulse discharge applications in re-
search.

Continuous power for RF tubes – magnetron, gyrotron, TWT, klystron etc.

Electron beam applications.

DC power source for pulsed hard-tube and solid state modulators.
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CAPACITOR CHARGING TECHNOLOGY

Capacitor charging applications require a power supply designed specifically for the
task. The Series 203 and 303 supplies allow capacitors to be charged in pulse forming
networks and modulators in a very fast, efficient and controllable manner.
The units are compact high power constant current sources that can linearly and rapidly
charge a capacitive load to high voltage. Once the load capacitor is charged to the pro-
grammed voltage, the supply will switch over to a voltage regulation mode and maintain
the load voltage at the programmed level until the load is discharged.
The flexible design of the 203 and 303 allow the units to be ordered with (L model) or
without (S model) the front panel controls and meters. The front panel controls are ideal
in applications where local control and readbacks are necessary, such as R&D, labora-
tory use and diagnostics. All front panel controls and indicator signals are available at
the rear panel remote control connector regardless which front panel option (L or S) is
selected. The S models feature only front panel status indicators and remote controls
and are a cost effective solution for applications where local controls are unnecessary.
The unit is self-contained, requiring only AC power and water for cooling. Several units
may be connected in parallel for higher power operation. There is no theoretical limit to
the number of units that may be paralleled. Typically one master unit and one or more
slave units may be used to obtain as much output power as necessary. Consult the
factory before connecting parallel units in continuous or DC applications.
The 203 and 303 are also ideally suited to charge reservoir capacitors in resonant
charging circuits where high rep rates (several kilohertz) are required, such as in metal
vapor lasers or solid-state modulators.
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CONTINUOUS DC OPERATION

Although the 203 and 303 series has been designed for capacitor charging applications,
they can also be used as a continuous DC High Power Source for RF tubes such as
klystrons, TWTs, or other DC loads such as DC-DC converters. The DC option must be
specified when ordering, and the supply will be factory setup and tested with a continu-
ous DC load. When 203/303 supplies are operated in continuous DC applications it is
necessary to add an external capacitor between the load and ground to improve the rip-
ple performance of the unit. Our online Application Note 505 describes operating capaci-
tor charging supplies in DC applications, and gives guidance in determining the size of
any additional external filter capacitance required.
App Note 505 can be found at:
http://www.us.tdk-lambda.com/hp/pdfs/application%20notes/93008505rC.pdf
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ADDITIONAL FEATURES:


Internal contactor and fuses for AC disconnect and protection
GENERAL INFORMATION
83489011 Rev A
, etc.
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