US 12,143,030 B2
Restart of an AC-to-DC converter upon a temporary drop-out of an AC voltage
Jongwan Kim, Katy, TX (US)
Assigned to TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US)
Filed by TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US)
Filed on Mar. 23, 2022, as Appl. No. 17/702,511.
Claims priority of provisional application 63/164,885, filed on Mar. 23, 2021.
Prior Publication US 2022/0311351 A1, Sep. 29, 2022
Int. Cl. H02M 7/219 (2006.01); H02M 1/32 (2007.01); H02M 1/42 (2007.01)
CPC H02M 7/219 (2013.01) [H02M 1/325 (2021.05); H02M 1/4233 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method of converting an alternating current (AC) voltage to a direct current (DC) voltage by an AC-to-DC converter, the method comprising:
producing an AC virtual waveform approximately synchronized to the AC voltage;
detecting a cessation of the AC voltage;
continuing to produce the AC virtual waveform during the cessation of the AC voltage;
detecting a resumption of the AC voltage;
upon detecting the resumption of the AC voltage, applying the AC virtual waveform to a control loop implemented by the AC-to-DC converter for a period of time; and
after the period of time, applying an output of a phase-locked loop to the control loop instead of the AC virtual waveform.