General Electric Company

Acleap Power Inc.

Lonlink Smart Storage Solution (shanghai) Co., Ltd.

Yifeng Sun

Lanlan Yin

Lishen Zhou

Yuan Liu

Xing Tong

Xiaojian Zhao

Qixue Yu

Xiaoming Huang

Yunlong Ma

Gang Wang

Embodiments of the present disclosure relate to a circuit for limiting duty cycle for a DC switching power supply. The circuit includes: a timing module and a switch control module. The timing module is configured to cause the variable output voltage to increase to a voltage threshold within a time shorter than a duration time of the first level of the period. The switch control module is configured to: in a period having the duty cycle greater than the maximum limit duty cycle, output a signal enabling the switch to be turned on before the variable output voltage increases to the voltage threshold, and output a signal enabling the switch to be turned off independently of the pulse signal after the variable output voltage increases to the voltage threshold. The circuit enables the duty cycle of the switch not to be excessively large during the transition phase.

Circuit for limiting duty cycle and DC switching power supply with constant output

Devices and methods for DC-to-DC conversion. The device includes a first transformer having a first winding at a primary side and a second winding at a secondary side. The device also includes a second transformer having a third winding at a primary side and a fourth winding at a secondary side. The device includes a controller configured to control a first current in the first winding of the first transformer and a second current in the third winding of the second transformer to flow in a first pattern, and to control the first current and the second current to flow in a second pattern.

Apparatus and method for DC-to-DC conversion

A roller reversing and jacking device for handling equipment comprises a directional roller set, at least one set of reversing and jacking assemblies and a reversing roller set. The reversing and jacking assemblies comprises: a jacking slider restricted to and disposed on the frame through a slider guide post; a reversing and jacking eccentric shaft correspondingly disposed on the jacking slider, comprising an eccentric shaft segment, an eccentric roller and a transmission shaft segment; and a reversing and jacking drive motor connected to and/or disconnected from one end of the transmission shaft segment, and the reversing and jacking drive motor fixedly mounted on the frame.

Roller reversing and jacking device for handling equipment

A buck-boost converter includes a buck-boost voltage converter circuit, an error controller and a buck-boost mode controller. The buck-boost voltage converter includes switches. The error controller is configured to provide a control signal based on a difference between an output voltage of the buck-boost voltage converter circuit and a reference voltage. The buck-boost mode controller determines switching duty cycles based on the control signal having at least three conditions: when DC is beyond a threshold value, apply one of buck regulation control and boost regulation control, where DC is a value of the control signal; when DC is not beyond and not substantially equal to the threshold value, apply the other of the buck regulation control and the boost regulation control; and when DC is substantially equal to the threshold value, apply buck-boost regulation control. The output voltage is regulated by the switching duty cycles.

Buck-boost converter and method for regulation

A power converter includes a primary side power circuit, a secondary side power circuit, and a synchronous rectifier drive circuit. The primary side power circuit includes a primary winding and a main switch coupled in series. The main switch is turned on and off in response to control signals. The secondary side power circuit includes a secondary winding, at least one synchronous rectifier switch, and an output inductor winding. The secondary winding is inductively coupled to the primary winding and forms a first magnetic coupling with the primary winding. The synchronous rectifier drive circuit includes a first and a second auxiliary winding coupled in series. The first auxiliary winding is inductively coupled to the primary winding and forms a second magnetic coupling with the primary winding. The second auxiliary winding is inductively coupled to the output inductor winding and forms a third magnetic coupling with the output inductor winding.

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Shanghai, China

Yifeng Sun