US 12,470,124 B2
Method and apparatus for controlling switches in a power converter
Shimon Khananashvili, Jerusalem (IL); and Yakir Loewenstern, Ariel (IL)
Assigned to Solaredge Technologies Ltd., Herzeliya (IL)
Filed by Solaredge Technologies Ltd., Herzeliya (IL)
Filed on Apr. 24, 2023, as Appl. No. 18/305,819.
Application 18/305,819 is a continuation of application No. 17/393,091, filed on Aug. 3, 2021, granted, now 11,677,307.
Claims priority of provisional application 63/060,312, filed on Aug. 3, 2020.
Prior Publication US 2023/0387785 A1, Nov. 30, 2023
Int. Cl. H02M 1/088 (2006.01); H02M 1/00 (2006.01); H02M 3/335 (2006.01); H02M 7/217 (2006.01); H02M 7/219 (2006.01); H02M 7/538 (2007.01); H02M 7/5387 (2007.01); H03K 17/12 (2006.01)
CPC H02M 1/088 (2013.01) [H02M 1/0054 (2021.05); H02M 1/0058 (2021.05); H02M 3/33515 (2013.01); H02M 7/217 (2013.01); H02M 7/219 (2013.01); H02M 7/5387 (2013.01); H03K 17/12 (2013.01); H03K 17/122 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A power converter comprising:
an input and an output;
a plurality of parallel-connected switches, wherein each of the plurality of parallel-connected switches is associated with a different modulation frequency of a plurality of modulation frequencies; and
a controller configured to:
generate a reference signal based on an AC voltage at the input or the output;
select, based on the reference signal being in one of at least three distinct ranges defined by a plurality of predefined threshold valnes, a subset of the plurality of parallel-connected switches; and
pulse width modulate each parallel-connected switch of the subset of the plurality of parallel-connected switches at its associated different modulation frequency, wherein the plurality of parallel-connected switches comprises three switches, and the controller is further configured to operate two switches of the three switches to be ON during at least one of a plurality of time segments within a time period of the AC voltage at the input or the output.