Библиографическая ссылка на патент
Pat. 10205444 United States, Int. Cl.22 H03K 3/017, H02M 1/08, H02M 1/38, H02M 7/483, H02M 7/487, H03K 5/04, H03K 7/08, H02M 7/5395, H03K 19/20. PWM control method for five-level inverting circuit, control circuit and inverter : Appl. N 15/664583 : Filed 31.07.2017 : Pub. 12.02.2019 : / Peng Chen, Jinhu Cao, Houlai Geng, Peng Wen ; Assignee Sungrow Power Supply Co Ltd ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10205444/en?oq=US10205444.html (дата обращения: ДД.ММ.ГГГГ).