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VIS-102B (March 15, 2006)

Communications & Power Industries, Inc., Beverly Microwave Division, 150 Sohier Rd., Beverly, MA 01915-5595, Tel 978-922-6000

HEATWAVE

TECHNICAL DATA

This data sheet supersedes any technical data sheet having a

date prior to

March 15, 2006

VIS-102B

2.45 GHz, 60 KW

Industrial

Microwave

Power System

DESCRIPTION

This integrated industrial microwave power system uses a CPI

VKS-7960A klystron, designed for industrial service, as the

energy source. By using the high-efficiency, 2.45-GHz, 60 kW

CW klystron in combination with modern control and power-

supply technology, CPI is able to furnish a compact, user-

friendly, cost-effective industrial system.

The system’s control center is an embedded microprocessor

architecture which provides flexibility in selecting system

operating parameters. Operation is initiated by two independent

external enable commands. Control of the system is through a

web-based browser via a direct Ethernet or web-based

connection. Operational data is logged in the controller’s on-

board flash memory. The logged data may be uploaded to the

external computer via the Ethernet connection for use in off-

line troubleshooting or other purposes.

The high-voltage power supply consists of a phase-angle

adjustable SCR controller, a step-up transformer and a full-

wave-bridge rectifier. There is no filter capacitor on the output

of the rectifier, thus very little stored energy, which eliminates

the need for a crowbar. As such, the DC output will have a

ripple voltage of 10% p-p. This has the advantage of causing

RF output amplitude and phase variation which facilitates mode

stirring and potentially a more even heating of the process.

System interlocks will remove the high voltage in less than 10

ms in the event of a fault. In addition, the klystron beam (high

voltage) power supply is remotely located. This makes it

possible to offer the VIS-102B in a corrosion resistant sealed

stainless steel 2-bay enclosure. Cooling for the system is 100%

via water; ambient air is not used for cooling purposes. A small

flow of clean air is used to slightly pressurize the enclosure and

keep potentially corrosive local ambient air from entering the

inside of the enclosure.

VIS-102B

TECHNICAL CHARACTERISTICS

OUTPUT

CW Power Operation:

Adjustable to 60 kW, maximum. Continuous control range in excess of 27 dB.

Frequency:

2.45 GHz nominal. Tunable over plus or minus 5 MHz

Waveguide:

WR-430

Waveguide Arc Detector:

Standard. The Klystron window and the waveguide are protected by the control system,

which will interrupt the RF drive power if arcs occur in the waveguide near the

klystron.

Forward and Reflected Power Monitor:

A directional coupler at the klystron output is included. Excessive reflected power will

also interrupt the RF drive power. A liquid-cooled, waveguide circulator capable of

dissipating the full system power is available as an option.