公开(公告)号：USRE50277E1

公开(公告)日：2025-01-21

申请号：US16931904

申请日：2020-07-17

Applicant: Delta Electronics, Inc.

Inventor： Haibin Song ,  Laszlo Huber ,  Daofei Xu ,  Alpha Zhang ,  Milan M. Jovanovic ,  Chien-Chung Chang

IPC: H02M3/335 ,  H02M1/00 ,  H02M1/32 ,  H02M1/34

Abstract: A flyback power converter includes a hybrid clamp circuit and a corresponding power management unit that substantially optimizes the performance of the flyback power converter in its entire line and load ranges. The clamp circuit, which is connected in parallel to a primary winding of the flyback transformer, includes a parallel combination of a capacitor and resistor that is connected in series with a parallel combination of a switch and a diode. By sensing the operating conditions, the power management circuit configures the clamp circuit either as a passive clamp or as an active clamp. In the passive-clamp configuration, the switch is kept turned off. In the active-clamp configuration, the switch operates with pulse-width modulation (PWM) which enables ZVS turn-on of the main switch.

公开(公告)号：US09496797B2

公开(公告)日：2016-11-15

申请号：US14304693

申请日：2014-06-13

Applicant: Delta Electronics, Inc.

Inventor： Yuri Panov ,  Milan M. Jovanovic ,  Brian T. Irving

IPC: H02M3/335 ,  H02M1/40 ,  H02M11/00

CPC classification number: H02M3/33584 ,  H02M1/40 ,  Y10T307/352

Abstract: A flux-balancing method for an isolated bidirectional converter uses a flux-balancing control loop and a current-balancing control loop to control the DC components in the primary and secondary currents. The flux-balancing control loop keeps the average magnetizing current substantially zero and the current-balancing control loop keeps the average primary current or the average secondary current substantially zero. The flux-balancing loop adjusts the duty ratio of a set of switches in a corresponding bridge. The adjusted duty ratio is designed to substantially eliminate the DC component in the magnetizing current. The current-balancing loop keeps the average primary current and the average secondary current substantially zero, and adjusts the duty ratio of the switches in a corresponding bridge to eliminate the corresponding DC component.

Abstract translation: 用于隔离双向转换器的磁通平衡方法使用磁通平衡控制回路和电流平衡控制回路来控制初级和次级电流中的直流分量。 磁通平衡控制回路保持平均磁化电流基本为零，并且电流平衡控制回路保持平均初级电流或平均次级电流基本为零。 磁通平衡环路调整相应电桥中一组开关的占空比。 调节占空比被设计为基本上消除了磁化电流中的直流分量。 电流平衡环路保持平均初级电流和平均次级电流基本为零，并调整相应桥中开关的占空比以消除相应的直流分量。

公开(公告)号：US20130235626A1

公开(公告)日：2013-09-12

申请号：US13861241

申请日：2013-04-11

Applicant: DELTA ELECTRONICS, INC.

Inventor： Yungtaek Jang ,  Milan M. Jovanovic

IPC: H02M5/458

CPC classification number: H02M5/4585 ,  H02M1/4216 ,  H02M7/217 ,  H02M7/23 ,  H02M2001/123 ,  Y02B70/126 ,  Y02P80/112

Abstract: A low input-current-harmonic three-phase three-level boost rectifier includes an input stage for receiving a three-phase input voltage in relation to a neutral node and an output stage adapted to couple to at least one load. The rectifier further includes one or more switching converter stages, each having a plurality of serially-connected switches coupled to the neutral node, one of the serially-connected switches operating with a fixed duty cycle while the other of the serially-connected switches operating with a variable duty cycle, the fixed duty cycle being a substantially 50% duty cycle and the variable duty cycle being less than or equal to a substantially 50% duty cycle. The serially-connected switches are coupled to clamping diodes and clamping capacitors. The rectifier further includes one or more controllers adapted to vary the switching frequency and/or duty cycle of the plurality of switches based on at least one of a condition of the at least one load or the input voltage and includes one or more decoupling stages, each including one or more inductive elements adapted to inductively decouple the output stage from at least one of the one or more switching converter stages.

Abstract translation: 低输入电流谐波三相三电平升压整流器包括用于接收相对于中性点的三相输入电压的输入级和适于耦合到至少一个负载的输出级。 整流器还包括一个或多个开关转换器级，每个开关转换器级具有耦合到中性点的多个串联连接的开关，其中一个串联连接的开关以固定占空比工作，而另一个串联的开关以 可变占空比，固定占空比是基本上50％的占空比，可变占空比小于或等于基本上50％的占空比。 串联的开关耦合到钳位二极管和钳位电容器。 整流器还包括适于基于至少一个负载或输入电压的条件中的至少一个来改变多个开关的开关频率和/或占空比的一个或多个控制器，并且包括一个或多个去耦阶段， 每个电感元件包括一个或多个感应元件，其适用于将所述输出级与所述一个或多个开关转换器级中的至少一个电感解耦。

公开(公告)号：US20150229225A1

公开(公告)日：2015-08-13

申请号：US14179496

申请日：2014-02-12

Applicant: Delta Electronics, Inc.

Inventor： Yungtaek Jang ,  Milan M. Jovanovic

IPC: H02M3/335

CPC classification number: H02M3/285 ,  H02M3/33569 ,  H02M3/33592 ,  H02M2001/0058 ,  Y02B70/1433 ,  Y02B70/1475 ,  Y02B70/1491

Abstract: Control methods for resonant converters offer improved performance in resonant converters that operate with a wide input-voltage range or a wide output-voltage range (or both) by substantially reducing the switching-frequency range. Reduction in the switching frequency range is achieved by controlling the output voltage with a combination of variable-frequency control and time-delay control. Variable-frequency control may be used to control the primary switches of an isolated resonant converter, while delay-time control may be used to control secondary-side rectifier switches provided in place of diode rectifiers. The secondary-side control may be implemented by sensing the secondary current or the primary current (or both) and by delaying the turning-off of the corresponding secondary switch with respect to the zero crossings in the secondary current or the primary current.

Abstract translation: 谐振转换器的控制方法通过大幅降低开关频率范围，提供了在宽输入电压范围或宽输出电压范围（或两者）下工作的谐振转换器的性能。 通过可变频率控制和时间延迟控制的组合控制输出电压来实现开关频率范围的降低。 可以使用变频控制来控制隔离谐振转换器的初级开关，而延迟时间控制可用于控制代替二极管整流器提供的次级侧整流器开关。 次级侧控制可以通过感测次级电流或初级电流（或两者）来实现，并且相对于次级电流或初级电流中的过零点延迟对应的次级开关的关断。

公开(公告)号：US20150078036A1

公开(公告)日：2015-03-19

申请号：US14027473

申请日：2013-09-16

Applicant: Delta Electronics, Inc.

Inventor： Milan M. Jovanovic ,  Brian T. Irving

IPC: H02M3/335

CPC classification number: H02M3/337 ,  H02M1/10 ,  H02M2001/0058 ,  Y02B70/1491

Abstract: A power converter topology is adapted for efficiency according to input voltage, output voltage or output current conditions. Topology adaptation is achieved by control responsive to the input and output operating conditions, or to one or more external control signals. Transition between any two topologies is implemented by pulse width modulation in the two switches in one of two bridge legs of a full bridge converter. When transitioning from full-bridge to half-bridge topology, the duty ratio of one switch in one leg of the full bridge is increased, while simultaneously the duty ratio of the other switch in the same leg is reduced until one switch is continuously on, while the other switch is continuously off. The transition from the half-bridge to the full-bridge topology is accomplished by modulating the same switches such that, at the end of the transition, both switches operate with substantially the same duty cycle.

Abstract translation: 电源转换器拓扑适用于根据输入电压，输出电压或输出电流条件的效率。 拓扑适应通过响应于输入和输出操作条件的控制，或一个或多个外部控制信号来实现。 任何两种拓扑之间的转换通过全桥转换器的两个桥臂之一中的两个开关中的脉冲宽度调制来实现。 当从全桥转换到半桥拓扑结构时，全桥一个开关的占空比增加，同时另一个开关在同一条支路中的占空比减小，直到一个开关持续导通， 而另一个开关持续关闭。 从半桥到全桥拓扑的转换通过调制相同的开关来实现，使得在转换结束时，两个开关以基本上相同的占空比工作。

公开(公告)号：US20150365005A1

公开(公告)日：2015-12-17

申请号：US14304693

申请日：2014-06-13

Applicant: Delta Electronics, Inc.

Inventor： Yuri Panov ,  Milan M. Jovanovic ,  Brian T. Irving

IPC: H02M3/335

CPC classification number: H02M3/33584 ,  H02M1/40 ,  Y10T307/352

Abstract: A flux-balancing method for an isolated bidirectional converter uses a flux-balancing control loop and a current-balancing control loop to control the DC components in the primary and secondary currents. The flux-balancing control loop keeps the average magnetizing current substantially zero and the current-balancing control loop keeps the average primary current or the average secondary current substantially zero. The flux-balancing loop adjusts the duty ratio of a set of switches in a corresponding bridge. The adjusted duty ratio is designed to substantially eliminate the DC component in the magnetizing current. The current-balancing loop keeps the average primary current and the average secondary current substantially zero, and adjusts the duty ratio of the switches in a corresponding bridge to eliminate the corresponding DC component.

Abstract translation: 用于隔离双向转换器的磁通平衡方法使用磁通平衡控制回路和电流平衡控制回路来控制初级和次级电流中的直流分量。 磁通平衡控制回路保持平均磁化电流基本为零，并且电流平衡控制回路保持平均初级电流或平均次级电流基本为零。 磁通平衡环路调整相应电桥中一组开关的占空比。 调节占空比被设计为基本上消除了磁化电流中的直流分量。 电流平衡环路保持平均初级电流和平均次级电流基本为零，并调整相应桥中开关的占空比以消除相应的直流分量。

公开(公告)号：US10141853B2

公开(公告)日：2018-11-27

申请号：US15428885

申请日：2017-02-09

Applicant: DELTA ELECTRONICS, INC.

Inventor： Haibin Song ,  Laszlo Huber ,  Daofei Xu ,  Alpha Zhang ,  Milan M. Jovanovic ,  Chien-Chung Chang

IPC: H02M3/335 ,  H02M1/32 ,  H02M1/00

Abstract: A flyback power converter includes a hybrid clamp circuit and a corresponding power management unit that substantially optimizes the performance of the flyback power converter in its entire line and load ranges. The clamp circuit, which is connected in parallel to a primary winding of the flyback transformer, includes a parallel combination of a capacitor and resistor that is connected in series with a parallel combination of a switch and a diode. By sensing the operating conditions, the power management circuit configures the clamp circuit either as a passive clamp or as an active clamp. In the passive-clamp configuration, the switch is kept turned off. In the active-clamp configuration, the switch operates with pulse-width modulation (PWM) which enables ZVS turn-on of the main switch.

公开(公告)号：US20180226895A1

公开(公告)日：2018-08-09

申请号：US15428885

申请日：2017-02-09

Applicant: DELTA ELECTRONICS, INC.

Inventor： Haibin Song ,  Laszlo Huber ,  Daofei Xu ,  Alpha Zhang ,  Milan M. Jovanovic ,  Chien-Chung Chang

IPC: H02M3/335 ,  H02M1/32 ,  H02M1/08

CPC classification number: H02M3/33569 ,  H02M1/32 ,  H02M1/34 ,  H02M3/33592 ,  H02M2001/0009 ,  H02M2001/0048 ,  H02M2001/0054 ,  H02M2001/344

Abstract: A flyback power converter includes a hybrid clamp circuit and a corresponding power management unit that substantially optimizes the performance of the flyback power converter in its entire line and load ranges. The clamp circuit, which is connected in parallel to a primary winding of the flyback transformer, includes a parallel combination of a capacitor and resistor that is connected in series with a parallel combination of a switch and a diode. By sensing the operating conditions, the power management circuit configures the clamp circuit either as a passive clamp or as an active clamp. In the passive-clamp configuration, the switch is kept turned off. In the active-clamp configuration, the switch operates with pulse-width modulation (PWM) which enables ZVS turn-on of the main switch.

公开(公告)号：US20170163163A1

公开(公告)日：2017-06-08

申请号：US14962997

申请日：2015-12-08

Applicant: Delta Electronics, Inc.

Inventor： Yungtaek JANG ,  Milan M. Jovanovic

IPC: H02M3/335

CPC classification number: H02M3/1582 ,  H02M2001/0058 ,  Y02B70/1491

Abstract: A bidirectional buck-boost converter includes at least one soft-switching cell to reduce switching losses by providing soft-switching of all semiconductor devices. A soft-switching cell comprises an active switch coupled in series with an inductor, a two-winding transformer, and a reset-voltage circuit. The soft-switching cells enable the buck and boost rectifiers to turn off with a controlled turn-off rate of their current to minimize their reverse-recovery losses, the power-controlling buck and boost switch to turn on with zero-voltage switching (ZVS), and the switch of the soft-switching cell to turn off with zero-current switching (ZCS).

公开(公告)号：US09621070B2

公开(公告)日：2017-04-11

申请号：US14797963

申请日：2015-07-13

Applicant: DELTA ELECTRONICS, INC.

Inventor： Peter Barbosa ,  Brian Irving ,  Chih-Chiang Chan ,  Yu-Ming Chang ,  Milan M. Jovanovic

IPC: H02M7/23 ,  H02M7/49 ,  H02M1/00

CPC classification number: H02M7/23 ,  H02M7/49 ,  H02M2001/0003 ,  H02M2001/0074

Abstract: A power supply includes power modules. Each of the power modules includes an input stage and an output stage. The input stage generates an intermediate voltage, and the output stage outputs a DC supply voltage according to the intermediate voltage. The input stages are controlled with at least one first common control signal having a common duty cycle, and the output stages are controlled with at least one second common control signal having a common duty cycle.