Abb Schweiz Ag

Rivian IP Holdings, LLC

Abb Power Electronics Inc.

Acleap Power Inc.

Marici Holdings the Netherlands B.v.

Yuxiang Shi

Jing Xu

Liming Liu

Eddy C Aeloiza

Muhammad Mobeen Mahmood

Steven E Schulz

Yu Du

Zhiguo Pan

Sandeep Bala

Utkarsh Raheja

Goran Mandic

Mohammad Nanda Rahmana Marwali

Weiqiang Chen

Prashanth Morkonda Umachandran

Aspects of the disclosure relate to a negative bias circuit for power device driving. An apparatus may include a power source, a gate impedance path, a capacitor in series with the gate impedance path, and a clamping circuit for a transistor gate.

Negative bias circuit for power device driving

A method for an auxiliary device of an auxiliary resonant commutated pole inverter (ARCPI) to determine a boosting time of the ARCPI is provided. The auxiliary device includes an auxiliary switch path that uses a resonant inductor with at least one saturable inductor. The method includes: calculating, by a processor of the auxiliary device, a first boosting time in the auxiliary switch path based on a theoretical resonance inductance and a voltage that are applied to the resonant inductor; determining, by the processor, a second boosting time in the auxiliary switch path based on a look-up table; and determining, by the processor, the boosting time in the auxiliary switch path based on the first boosting time and the second boosting time. The method further includes controlling, by the processor, boosting current of the ARCPI based on the boosting time in the auxiliary switch path.

Method for boosting current compensation in auxiliary resonant commutated pole inverter (ARCPI) with saturable inductor

A power stage circuit for AC to DC and DC to AC applications includes an AC to DC circuit having multiple totem pole circuits. Two totem pole circuits are designed for 120 VAC and may include inductors with the same inductance values. An additional totem pole circuit is a neutral line and includes an inductor with a different (e.g., lower) inductance value. By choosing inductors with the same inductance values, the 120-VAC sources can be decoupled and separately controlled (e.g., subtracted from each other on one circuit and added together on another circuit) to provide split phase AC power for a power outlet in DC to AC applications.

Split leg filtering for bidirectional power stages

A device for load line regulation of a sigma convert is provided. The device comprises a sigma converter comprising an inductor inductor capacitor (LLC) circuit and a buck converter. The device also comprises control circuitry for the sigma converter. The control circuitry is configured to receive a plurality of electrical measurements associated with the sigma converter; determine, based on the plurality of electrical measurements, an adjusted electrical characteristic for load line regulation of the sigma converter; and provide, based on the adjusted electrical characteristic, gating signals to the buck converter to perform the load line regulation of the sigma converter.

Systems and methods for load line regulation of sigma converters

A soft switching resonant converter is disclosed. The converter includes a power switch operable to connect and disconnect a DC link rail node and an output node. A resonant capacitor is coupled with the power switch. An auxiliary leg is coupled with a DC link midpoint node and the output node. An active damper is coupled in series with the resonant capacitor and the output node and is controllable to provide a first resistance of the active damper in a first state and a second resistance of the active damper in a second state, the first resistance having a lower magnitude than the second resistance. A driver controls the damper switch to provide a first resistance during the soft switching operation of the power switch and a second resistance after the soft switching operation of the power switch.

Active damping of soft switching resonant converters

According to one aspect of the present disclosure, a single-stage converter includes a rectifying circuit and a buck-boost circuit. The buck-boost circuit includes an inductor with a center tap configured to supply an output of the buck-boost circuit to the rectifying circuit. The buck-boost circuit also includes first and second interleaved arms arranged in parallel with a voltage input of the single-stage converter. The first and second interleaved arms are each coupled to the inductor and include a plurality of switches operable to control the output of the buck-boost circuit.

Single-stage isolated DC-DC converters

Unique systems, methods, techniques and apparatuses of photovoltaic (PV) string power systems are disclosed. One exemplary embodiment is a PV power system comprising a plurality of PV strings and a floating DC-DC optimizer. The floating DC-DC optimizer comprises a first DC bus rail, a second DC bus rail, a plurality of input legs, each leg being coupled across the first DC bus rail and second DC bus rail, including two input leg semiconductor switches coupled at an input terminal, each input terminal being structured to receive an input current from an end of one PV string of the plurality of PV strings, and an output leg including two output leg semiconductor devices coupled at an output terminal.

Growing community of inventors

Cary, NC, United States of America

Yuxiang Shi