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US 2022/0103094 A1Published application
Bridgeless single-phase pfc multi-level totem-pole power converter
AssigneeHuawei Digital Power Technologies Co., Ltd.
InventorGrover Victor TORRICO-BASCOPÉ
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Abstract
A power conversion apparatus employs multi-level techniques and wide band-gap semiconductor switching devices to achieve high efficiency in a converter system having high power density. The apparatus may be configured as a bi-directional conversion system capable of operating as both an inverter, configured to receive DC power and produce AC power, and as a rectifier configured to receive AC power and produce DC power. The apparatus is especially suitable for electric vehicle (EV) applications.
Claims17
An apparatus, comprising:
- a plurality of high frequency switching cells comprising a first high frequency switching cell connected in parallel with a second high frequency switching cell;
- a plurality of inductors inductively coupling a common connection point with at least a first connection point and at least a second connection point, wherein at least one inductor of the plurality of inductors is magnetically coupled to at least one other inductor of the plurality of inductors
- a midpoint of the first high frequency switching cell being connected to the at least one first connection point, and a midpoint of the second high frequency switching cell being connected to the at least one second connection point;
- a boost inductor having a first end coupled to a first alternating current (AC) voltage and a second end coupled to the common connection point;
- and
- a low frequency switching cell connected in parallel with the plurality of high frequency switching cells, a midpoint of the low frequency switching cell coupled to a second AC voltage.
3 more elements
A method, comprising:
- receiving an alternating current (AC) power within a boost inductor;
- transferring the AC power to a plurality of inductors, wherein at least one inductor of the plurality of inductors is magnetically coupled to at least one other inductor of the plurality of inductors;
- distributing the AC power to each midpoint of a plurality of high frequency switching cells, which is coupled in parallel with a direct current (DC) power;
- transferring the AC power to the DC power by operating the plurality of high frequency switching cells based on a plurality of pulse-width modulation (PWM) switch control signals;
- and
- returning the DC power to the AC power through a low frequency switching cell, wherein a switching frequency of the low frequency switching cell is synchronized with a primary frequency of the AC power.
3 more elements
Dependencies are inferred from the claim text.