US 12,483,128 B2
Three-level boost converter and control method
Jun Wang, Shanghai (CN); Lei Shi, Shanghai (CN); Yunfeng Liu, Shanghai (CN); and Zhaohui Wang, Nuremberg (DE)
Assigned to Huawei Digital Power Technologies Co., Ltd., Shenzhen (CN)
Filed by Huawei Digital Power Technologies Co., Ltd., Shenzhen (CN)
Filed on Jan. 19, 2023, as Appl. No. 18/156,554.
Application 18/156,554 is a continuation of application No. PCT/CN2021/081970, filed on Mar. 22, 2021.
Claims priority of application No. 202010713160.6 (CN), filed on Jul. 22, 2020.
Prior Publication US 2023/0155499 A1, May 18, 2023
Int. Cl. H02M 3/156 (2006.01); H02M 1/00 (2006.01); H02M 1/08 (2006.01); H02M 1/14 (2006.01)
CPC H02M 3/156 (2013.01) [H02M 1/0095 (2021.05); H02M 1/08 (2013.01); H02M 1/14 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A converter, comprising:
a first switching transistor;
a second switching transistor;
an inductor;
a flying capacitor; and
a controller, wherein the first switching transistor and the second switching transistor are primary power transistors;
when a voltage of the flying capacitor is less than or equal to a half of a bus voltage, the controller is configured to send a first driving signal to the first switching transistor, and send a second driving signal to the second switching transistor; or
when a voltage of the flying capacitor is greater than a half of a bus voltage, the controller is configured to send a first driving signal to the second switching transistor, and sends a second driving signal to the first switching transistor, wherein the bus voltage is an output voltage of the three-level boost converter; and
the second driving signal has N pulses in each period of the first driving signal, the inductor has N+1 charge and discharge periods in each period of the first driving signal, and N is an integer greater than or equal to 2.