US 12,261,464 B2
High voltage device built from modular low voltage devices and operation methods thereof
Ruxi Wang, Cary, NC (US); Zhiyu Shen, Cary, NC (US); Chi Zhang, Apex, NC (US); Tomas Sadilek, Cary, NC (US); and Peter Mantovanelli Barbosa, Cary, NC (US)
Assigned to Delta Electronics, Inc., Taipei (TW)
Filed by Delta Electronics, Inc., Taipei (TW)
Filed on Sep. 23, 2021, as Appl. No. 17/483,518.
Claims priority of provisional application 63/179,805, filed on Apr. 26, 2021.
Prior Publication US 2022/0344946 A1, Oct. 27, 2022
Int. Cl. H02J 7/00 (2006.01); H03K 17/687 (2006.01)
CPC H02J 7/0014 (2013.01) [H02J 7/0048 (2020.01); H03K 17/6871 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A high voltage device, comprising:
a plurality of modular cells, each comprising a first terminal, a second terminal, and a control terminal,
wherein the modular cells are connected in series, such that the first terminal of one of the modular cells is connected to the second terminal of a neighboring one of the modular cells, and each of the modular cells comprises a plurality of low voltage semiconductor devices and one or more low voltage passive components; and
a control unit, configured to transmit a control signal to the control terminal of each of the modular cells, wherein the control signal is shifted by a delay time for a respective one of the modular cells, the control unit comprises a level generation module and a sequence controller, the level generation module is configured to generate the delay time based on a PWM signal of a respective one of the modular cells, the sequence controller is configured to generate a duty cycle or a sequence position of the control signal of the plurality of modular cells according to cell voltages of the plurality of modular cells and an output current polarity of the high voltage device.