Ac resonant charger with charge rate unrelated to preimary power requency

Patent · Fri Dec 07 00:00:00 EST 1979

OSTI ID:6902903

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.

• DOE Contract Number: W-7405-ENG-48
• Assignee: Dept. of Energy
• OSTI ID: 6902903
• Country of Publication: United States
• Language: English

Related Subjects

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)