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公开(公告)号：US09473017B2
公开(公告)日：2016-10-18
申请号：US14707015
申请日：2015-05-08
Applicant: DELTA ELECTRONICS, INC.
Inventor： Hong-Yuan Jin , De-Sheng Guo , Hong-Jian Gan , Jian-Ping Ying
CPC classification number: H02M1/4208 , G05F1/70 , H02M1/4225 , H02M3/156 , H02M7/06 , Y02B70/126 , Y02P80/112
Abstract: A control circuit, control method used in a PFC circuit and the power source system thereof are disclosed herein. The control circuit comprises: a zero current detection circuit having a polarity detection circuit for outputting a first and a second digital signals and a signal conversion circuit for generating an analog signal; a feedback circuit for generating a driving pulse signal; and a pulse distribution circuit for distributing the driving pulse signal to a first and a second switches according to the first and the second digital signal. After a switch cycle, one of the first and the second switch performs an ON operation for the next switch cycle when the current flowing through the inductor decreases to a predetermined threshold value, wherein an ON time of the first switch is equal in each switch cycle, and an ON time of the second switch is equal in each switch cycle.
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2.发明授权Control circuit, control method used in PFC circuit and power source system thereof 有权控制电路，PFC电路中使用的控制方法及其电源系统公开(公告)号：US09189004B2
公开(公告)日：2015-11-17
申请号：US13759043
申请日：2013-02-05
Applicant: Delta Electronics, Inc.
Inventor： Hong-Yuan Jin , De-Sheng Guo , Hong-Jian Gan , Jian-Ping Ying
CPC classification number: H02M1/4208 , G05F1/70 , H02M1/4225 , H02M3/156 , H02M7/06 , Y02B70/126 , Y02P80/112
Abstract: A control circuit, control method used in a PFC circuit and the power source system thereof are disclosed herein. The control circuit comprises: a zero current detection circuit having a polarity detection circuit for outputting a first and a second digital signals and a signal conversion circuit for generating an analog signal; a feedback circuit for generating a driving pulse signal; and a pulse distribution circuit for distributing the driving pulse signal to a first and a second switches according to the first and the second digital signal. After a switch cycle, one of the first and the second switch performs an ON operation for the next switch cycle when the current flowing through the inductor decreases to a predetermined threshold value, wherein an ON time of the first switch is equal in each switch cycle, and an ON time of the second switch is equal in each switch cycle.
Abstract translation: 本文公开了PFC电路中使用的控制电路，控制方法及其电源系统。 控制电路包括：零电流检测电路，具有用于输出第一和第二数字信号的极性检测电路和用于产生模拟信号的信号转换电路; 用于产生驱动脉冲信号的反馈电路; 以及脉冲分配电路，用于根据第一和第二数字信号将驱动脉冲信号分配到第一和第二开关。 在开关周期之后，当流过电感器的电流降低到预定阈值时，第一和第二开关中的一个开关对下一个开关周期执行ON操作，其中在每个开关周期中第一开关的导通时间相等 并且在每个开关周期中第二开关的导通时间相等。
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公开(公告)号：US09577528B2
公开(公告)日：2017-02-21
申请号：US14792628
申请日：2015-07-07
Applicant: DELTA ELECTRONICS, INC.
Inventor： Li-Ping Sun , De-Sheng Guo , Chao Yan
CPC classification number: H02M3/158 , H02M7/487 , H02M2001/0009 , H02M2001/346 , Y02B70/1491
Abstract: A power converting circuit includes a converter. The converter receives and converts an input power to provide power for a load. The converter includes a power storage unit, a switch unit, a capacitor unit, and a current sampling unit. The power storage unit includes input and output terminals. The switch unit includes first and second switches, which are series connected at a common terminal, and the common terminal is coupled to the output terminal of the power storage unit. The capacitor unit includes first and second capacitors. The first capacitor and the switch unit are parallel connected to form a capacitor-switch parallel structure. The second capacitor capacitance is more than ten times larger than the first capacitor capacitance. The current sampling unit and the capacitor-switch parallel structure are series connected to form a capacitor-sampling unit series structure. The capacitor-sampling unit series structure and the second capacitor are parallel connected.
Abstract translation: 功率转换电路包括转换器。 转换器接收并转换输入电源以为负载提供电力。 转换器包括蓄电单元，开关单元，电容器单元和电流采样单元。 蓄电单元包括输入和输出端子。 开关单元包括在公共端子串联连接的第一和第二开关，并且公共端子耦合到蓄电单元的输出端子。 电容器单元包括第一和第二电容器。 第一电容器和开关单元并联连接形成电容器开关并联结构。 第二电容电容比第一电容电容大十倍以上。 电流采样单元和电容开关并联结构串联连接形成一个电容采样单元串联结构。 电容器采样单元串联结构和第二电容并联。
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公开(公告)号：US09634556B2
公开(公告)日：2017-04-25
申请号：US14705982
申请日：2015-05-07
Applicant: DELTA ELECTRONICS, INC.
Inventor： Chao Yan , Li-Ping Sun , Zhi-Hui Ding , De-Sheng Guo
CPC classification number: H02M1/4225 , Y02B70/126
Abstract: A control method for a power converter is provided. The power converter includes an inductor, and a switch selectively turned on according to a control signal. The control method includes determining an on-time and a falling time according to a voltage information or a current information of the power converter; determining a switching period of the control signal according to the on-time, the falling time, and a resonant period corresponding to the inductor and a parasitic capacitance of the switch; adjusting the switching period by comparing the switching period with a first threshold period and a second threshold period; generating the control signal having the switching period when the switching period is greater than the first threshold period and less than the second threshold period or when the switching period is greater than the second threshold period and the power converter operates at over 50% of a rated power.
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