Patent
Zero-voltage-switched, three-phase PWM rectifier inverter circuit
TLDR
In this article, a switching rectifier circuit that combines the conventional three-phase, 6-stepped PWM rectifier/inverter circuit with a simple, low-power switch commutation circuit to provide zero-voltage turn-on for the switches, and soft turn-off for the diodes.Abstract:
A novel switching rectifier circuit that combines the conventional three-phase, 6-stepped PWM rectifier/inverter circuit with a simple, low-power switch commutation circuit to provide zero-voltage turn-on for the switches, and soft turn-off for the diodes. The main features of the new circuit include elimination of switching losses on the power switches and reverse recovery problems on the diodes, elimination of the need for any snubbers in the three-phase bridge, possibility of use of slower diodes in the power bridge, constant frequency operation, and no increase in component current and voltage stresses over the conventional PWM rectifier.read more
Citations
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Patent
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Patent
Current stiff converters with resonant snubbers
TL;DR: In this paper, a current stiff power conversion system, such as a rectifier, inverter, or AC-to-AC converter, is provided wherein power converter switching devices in the power converting system may be switched at or near zero voltage conditions to minimize or eliminate switching losses and increase switching frequencies.
References
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Patent
System and method for reducing harmonic currents by current injection
TL;DR: In this paper, a circuit is provided for generating a current that is a harmonic of the frequency of the utility system and which is of a selected amplitude and phase to reduce the total harmonic distortion of a system that converts alternating current to direct current, or vice versa.
Patent
Control system for a voltage-type inverter
TL;DR: In this article, a voltage detection device is provided to detect an output voltage of the inverter, and a voltage correction circuits corrects the pulse width of the pulsewidth modulation signal in accordance with the comparison of the detected voltage and the PWM signal.
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Harmonically modified twelve-pole inverter
TL;DR: In this paper, a twelve-pole inverter for eliminating all of the relevant low-order harmonic component frequencies, except the fundamental for an AC output from a source of DC input voltage, is presented.
Patent
Current source sine wave inverter
TL;DR: In this article, an n-phase current source inverter with a choke coil coupled between the first DC bus line and a DC rail of the inverter is presented. But the choke coil is not connected to the switch to close the switch when the switch is switched off or disconnected from the DC source.
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