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Title: Ac resonant charger with charge rate unrelated to preimary power requency

Abstract

An ac resonant charger for a capacitive load, such as a pulse forming network (PFN), is provided with a variable repetition rate unrelated to the frequency of a multi-phase ac power source by using a control unit to select and couple the phase of the power source to the resonant charger in order to charge the capacitive load with a phase that is the next to begin a half cycle. For optimum range in repetition rate and increased charging voltage, the resonant charger includes a step-up transformer and full-wave rectifier. The next phase selected may then be of either polarity, but is always selected to be of a polarity opposite the polarity of the last phase selected so that the transformer core does not saturate. Thyristors are used to select and couple the correct phase just after its zero crossover in response to a sharp pulse generated by a zero-crossover detector. The thyristor that is turned on then automatically turns off after a full half cycle of its associated phase input. A full-wave rectifier couples the secondary winding of the transformer to the load so that the load capacitance is always charged with the same polarity.

Issue Date:
OSTI Identifier:
6902903
Assignee:
Dept. of Energy TIC; ERA-06-005182; EDB-81-005700
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; PULSE GENERATORS; DESIGN; AC SYSTEMS; CAPACITORS; CONTROL; FREQUENCY DEPENDENCE; FREQUENCY RANGE; LASER CAVITIES; PULSES; RECTIFIERS; SILICON; THYRISTORS; TRANSFORMERS; ELECTRICAL EQUIPMENT; ELECTRONIC EQUIPMENT; ELEMENTS; EQUIPMENT; FUNCTION GENERATORS; POWER SYSTEMS; SEMICONDUCTOR DEVICES; SEMIMETALS 420300* -- Engineering-- Lasers-- (-1989)

Citation Formats

Not Available. Ac resonant charger with charge rate unrelated to preimary power requency. United States: N. p., 1979. Web.
Not Available. Ac resonant charger with charge rate unrelated to preimary power requency. United States.
Not Available. Fri . "Ac resonant charger with charge rate unrelated to preimary power requency". United States.
@article{osti_6902903,
title = {Ac resonant charger with charge rate unrelated to preimary power requency},
author = {Not Available},
abstractNote = {An ac resonant charger for a capacitive load, such as a pulse forming network (PFN), is provided with a variable repetition rate unrelated to the frequency of a multi-phase ac power source by using a control unit to select and couple the phase of the power source to the resonant charger in order to charge the capacitive load with a phase that is the next to begin a half cycle. For optimum range in repetition rate and increased charging voltage, the resonant charger includes a step-up transformer and full-wave rectifier. The next phase selected may then be of either polarity, but is always selected to be of a polarity opposite the polarity of the last phase selected so that the transformer core does not saturate. Thyristors are used to select and couple the correct phase just after its zero crossover in response to a sharp pulse generated by a zero-crossover detector. The thyristor that is turned on then automatically turns off after a full half cycle of its associated phase input. A full-wave rectifier couples the secondary winding of the transformer to the load so that the load capacitance is always charged with the same polarity.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1979},
month = {12}
}