US 12,231,034 B2
Drive circuit with energy recovery function and switch mode power supply
Mattias Andersson, Kista (SE); Grover Victor Torrico-Bascopé, Kista (SE); Shengyong Dai, Dongguan (CN); Xiao Zhang, Xi'an (CN); and Qingzu Hong, Shenzhen (CN)
Assigned to HUAWEI TECHNOLOGIES CO., LTD., Shenzhen (CN)
Filed by HUAWEI TECHNOLOGIES CO., LTD., Guangdong (CN)
Filed on Dec. 22, 2022, as Appl. No. 18/145,179.
Application 18/145,179 is a continuation of application No. PCT/CN2021/101795, filed on Jun. 23, 2021.
Claims priority of application No. 202010595162.X (CN), filed on Jun. 23, 2020.
Prior Publication US 2023/0131154 A1, Apr. 27, 2023
Int. Cl. H02M 1/088 (2006.01); H02M 3/07 (2006.01)
CPC H02M 1/088 (2013.01) [H02M 3/07 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A drive circuit configured to include an energy recovery function, the drive circuit comprising:
a control circuit;
an energy recovery drive circuit;
a switch circuit; and
a direct current power supply, wherein
the control circuit is operatively coupled to the energy recovery drive circuit, the energy recovery drive circuit is operatively coupled to the switch circuit, and the direct current power supply is operatively coupled to the energy recovery drive circuit,
the control circuit is configured to control the energy recovery drive circuit to enable an energy storage capacitor in the energy recovery drive circuit to charge a junction capacitor of the switch circuit at a first moment, and enable the direct current power supply to charge the junction capacitor of the switch circuit through the energy recovery drive circuit at a second moment, thereby turning on the switch circuit, and
the control circuit is further configured to control the energy recovery drive circuit to enable the junction capacitor of the switch circuit to charge the energy storage capacitor in the energy recovery drive circuit at a third moment, and enable the junction capacitor of the switch circuit to discharge to a ground through the energy recovery drive circuit at a fourth moment, thereby turning off the switch circuit, wherein
the energy recovery drive circuit comprises:
a push-pull drive circuit; and
an energy recovery circuit, wherein
the control circuit is operatively coupled to the push-pull drive circuit and the energy recovery circuit, the push-pull drive circuit and the energy recovery circuit are operatively coupled to the switch circuit, and the direct current power supply is operatively coupled to the push-pull drive circuit,
the control circuit is configured to control the energy recovery drive circuit to enable the energy storage capacitor in the energy recovery drive circuit to charge the junction capacitor of the switch circuit at the first moment, and enable the direct current power supply to charge the junction capacitor of the switch circuit through the energy recovery drive circuit at the second moment comprises:
the control circuit is configured to control the energy recovery circuit to enable the energy storage capacitor in the energy recovery circuit to charge the junction capacitor of the switch circuit at the first moment, and control the push-pull drive circuit to enable the direct current power supply to charge the junction capacitor of the switch circuit through the push-pull drive circuit at the second moment; and
the control circuit is further configured to control the energy recovery drive circuit to enable the junction capacitor of the switch circuit to charge the energy storage capacitor in the energy recovery drive circuit at the third moment, and enable the junction capacitor of the switch circuit to discharge to the ground through the energy recovery drive circuit at the fourth moment comprises:
the control circuit is configured to control the energy recovery circuit to enable the junction capacitor of the switch circuit to charge the energy storage capacitor in the energy recovery circuit at the third moment, and control the push-pull drive circuit to enable the junction capacitor of the switch circuit to discharge to the ground through the push-pull drive circuit at the fourth moment.