摘要:
In many power electronics systems, there is an intermediate DC-link stage for facilitating the power processing of different sources to their loads. A device called a plug-and-play ripple pacifier (RP) directly plugged into the DC-link, and actively removes undesired DC-link ripple, thereby eliminating the reliance on electrolytes capacitors for stabilizing the system and remove ripple. Importantly, the use of this device is non-invasive to the operation of its host systems, and requires no modification of existing hardware. It is suitable for the protection of DC utilities/systems and can also be used as a direct replacement of ripple-canceling E-Caps in power converters device.
摘要:
The invention relates to a pulse-controlled inverter (1) having an input circuit (2) that is designed to provide an input DC voltage (5) between a high-side input (2a) and a low-side input (2b), wherein the input circuit (2) has a first high-side stray capacitance (21a), a first low-side stray capacitance (21b), a first high-side stray inductance (22a, 22a′) and a first low-side stray inductance (22b, 22b′); having a busbar arrangement (3) that is designed to electrically connect the high-side input (2a) to a high-side connection (4a) and to electrically connect the low-side input (2b) to a low-side connection (4b), wherein the busbar arrangement (3) has second stray capacitances (31a, 31b) and second stray inductances (32a, 32b); and having an n-phase inverter module (4), n>1, that is electrically coupled to the high-side connection (4a) and to the low-side connection (4b) and is designed to convert the input DC voltage (5) into an n-phase output AC voltage (6), wherein the inverter module (4) has third stray capacitances (41a, 41b) and third stray inductances (42a, 42b); wherein the sum of the high-side stray capacitances (21a, 31a, 41a) is equal to the sum of the low-side stray capacitances (21b, 31b, 41b) and the sum of the high-side stray inductances (22a, 22a′, 32a, 42a) is equal to the sum of the low-side stray inductances (22b, 22b′, 32b, 42b).
摘要:
Disclosed herein is a power conversion device including a storage and a power conversion controller. The storage stores multiple values, each correlated to a disturbance that causes distortion in a current to a power converter, in association with a phase angle of a voltage of an AC power supply. The power conversion controller controls ON/OFF operations by using the values stored in the storage to compensate for a manipulated variable of control performed by the power converter in association with the phase angle of the voltage of the AC power supply.
摘要:
The present disclosure is directed to an electric drive. The electric drive may include a first power inverter, a second power inverter, and a positive DC bus connecting the first power inverter and the second power inverter. The electric drive may also include a first switch connected to the positive DC bus between the first power inverter and the second power inverter. The electric drive may include a second switch connected to the positive DC bus between the first power inverter and the second power inverter. The electric drive may further include a control unit connected to the first switch and to the second switch. The control unit may be configured to selectively allow current to pass through the first switch and the second switch.
摘要:
Methods and systems for a startup self-test for bidirectional power converters. Voltage levels across bidirectional switches in a bidirectional power converter can be compared at various points in a circuit to determine whether a given switch is operating correctly.
摘要:
A method for profiling network traffic of a network. The method includes extracting cells from bi-directional payloads generated by a network application, wherein each cell comprises at least one direction reversal in a corresponding bi-directional flow, generating a cell group comprising a portion of the cells that are similar, analyzing the cell group to generate a signature of the network application, and classifying, based on the signature of the network application, a new bi-directional flow as being generated by the network application.
摘要:
An electric power supply system, comprising: a main switching cell (6) comprising a first main branch (14) and a second main branch (16) each including a main switch (T1, T2), and an auxiliary switching cell (10) connected to the main switching cell (6) and comprising a first secondary branch (20) and a second secondary branch (22) on the one hand, each including a secondary switch (T3, T4) and a connection branch (24) for connecting the auxiliary switching cell (10) to the main switching cell (6) on the other hand, the connection branch (24) including a switching inductor (L1), the main switching cell (6) and the auxiliary switching cell (10) being connected, cascaded from each other. The auxiliary switching cell (10) comprises at least two switching capacitors (C1, C2) positioned parallel to one of the secondary switches (T3, T4) for one of them and parallel to one of the main switches (T1, T2) for the other one.An aircraft comprising at least such a power supply system.
摘要:
A submodule for a modular multistage converter contains a first and a second connection terminal, an energy store, and a power semiconductor circuit which is connected to the energy store such that the voltage dropping at the energy store can be generated at the connection terminals in a first switch state and a zero voltage can be generated at the connection terminals in a second switch state. The aim is to provide such a submodule which allows an inexpensive submodule housing to be used while maintaining the same energy storage capacity or which allows an increased energy storage capacity while using the same housing without thereby undermining the protection provided by the submodule housing. This is achieved in that the power semiconductor circuit is connected in parallel to an energy storage branch in which the energy store and a device for limiting a surge current are arranged.
摘要:
An inverter apparatus is provided. The inverter apparatus includes a direct current to direct current (DC/DC) converter, a direct current to alternating current (DC/AC) converter and a control circuit. The DC/DC converter is arranged for converting an input power to a DC power according to a control signal. The DC/AC converter is coupled to the DC/DC converter, and is arranged for receiving the DC power, and generating an AC power according to the DC power. The control circuit is coupled to the DC/DC converter, and is arranged for generating the control signal according to a reference power and the input power so as to control an operation of the DC/DC converter, detecting the control signal to generate a detection result, and controlling the reference power according to the detection result so as to adjust a duty cycle of the control signal.
摘要翻译:提供了一种逆变器装置。 逆变器装置包括直流到直流(DC / DC)转换器,直流到交流(DC / AC)转换器和控制电路的直流电。 DC / DC转换器被配置为根据控制信号将输入功率转换为DC电力。 DC / AC转换器耦合到DC / DC转换器,并且被配置为接收DC电力,并且根据DC电力产生AC电力。 控制电路耦合到DC / DC转换器,并且被配置为根据参考功率和输入功率产生控制信号,以便控制DC / DC转换器的操作,检测控制信号以产生检测 结果,并根据检测结果控制参考功率,以调整控制信号的占空比。
摘要:
A car charging station in which battery buffering includes at least approximately as much energy as is required to charge one car rapidly. This is particularly advantageous when a photovoltaic array is connected through a power converter to charge the battery, and also to provide a lower rate of charge directly to the vehicle charge connections. Advantageously, a mains power connection can also be made through yet another port of the same multiport power converter.