Power supply circuit for filament of high-power electronic tube

A technology of power supply circuit and electron tube, applied in the direction of output power conversion device, DC power input conversion to DC power output, electrical components, etc., can solve the problem of limited adjustment range and achieve effective control
CN1100286CInactive Publication Date: 2003-01-29马廷和
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
马廷和
Publication Date
2003-01-29
Estimated Expiration
Not applicable · inactive patent

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Abstract

A power supply circuit for the filament of high-power electronic tube features that it uses a voltage-stabilized switching power supply controlled by PWM circuit and a smoothing controller for raising up its reference voltage from zero to rated value smoothly. It can make the voltage smoothly applied to the filament until a steady value, preventing current shock to elongate the service life of electronic tube by more than 5 times.
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Description

Technical field:

[0001] The present invention relates to power circuits. More specifically, it is a power supply circuit for high-power electronic tube filaments. Background technique:

[0002] The voltage and current applied to the cathode of the electron tube are necessary conditions for the normal operation of the electron tube. It can make the cathode temperature of the electron tube reach thousands of degrees. Since the voltage applied to the filament directly affects the life of the electron tube, it must have a certain degree of stability and accuracy. However, various power supply circuits in the prior art have no high-precision voltage stabilizing measures, and there are surge current impacts, etc., which not only greatly affect the service life of the electron tube, but also have low efficiency and high energy consumption.

[0003] In the publication specification of the invention patent application whose publication number is CN1069348A, a kind of "switching pow...

Claims

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