Three-phase ac-to-ac series-resonant power converter with a reduced number of thyristors

Journal Article · Mon Jul 01 04:00:00 EDT 1991 · Modern Physics Letters A; (Singapore)

DOI:https://doi.org/10.1109/63.85901· OSTI ID:7068773

Klaassens, J B; de Beer, F ^[1]

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1. Delft Univ. of Technology, Lab. of Power Electronics, Mekelweg 4, 2628 DC Delft (NL)

This paper reports that ac-ac series-resonant converters have been proven to be functional and useful. Power pulse modulation with internal frequencies of tens of kHz and suited for multikilowatt power levels is applied to a series-resonant converter system for generating synthesized multiphase bipolar waveforms with reversible power flow and flow distortion. The use of a series-resonant circuit for power transfer and control obtains natural current commutation of the thyristors and the prevention of excessive stresses on components. Switches are required which have bidirectional current conduction and voltage blocking ability. The conventional series-resonant ac-ac converter applies a total for 24 anti-parallel thyristors. An alternative circuit configuration for the series-resonant ac-ac converter with only 12 thyristors is also presented. The alternative power circuit has three neutrals, related to the polyphase source, the load and the converter, which may be interconnected. If they are connected, the high-frequency component of the source and load currents will flow through the connection between the neutrals. The test results of a converter system generating three-phase sinusoidal input and output waveforms have demonstrated the significant aspects of this type of power interfaces.

• OSTI ID: 7068773
• Journal Information: Modern Physics Letters A; (Singapore), Journal Name: Modern Physics Letters A; (Singapore) Vol. 7:16; ISSN 0217-7323; ISSN MPLAE
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
426000* -- Engineering-- Components
Electron Devices & Circuits-- (1990-)
DATA
DC TO DC CONVERTERS
ELECTRICAL EQUIPMENT
ELECTRONIC EQUIPMENT
ENERGY TRANSFER
EQUIPMENT
FREQUENCY RANGE
INFORMATION
KHZ RANGE
MODULATION
PULSE CONVERTERS
RESONANCE
SEMICONDUCTOR DEVICES
TESTING
THYRISTORS
WAVE FORMS