CN101237191A - AC-to-AC converter - Google Patents

AC-to-AC converter Download PDF

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Publication number
CN101237191A
CN101237191A CN 200710063178 CN200710063178A CN101237191A CN 101237191 A CN101237191 A CN 101237191A CN 200710063178 CN200710063178 CN 200710063178 CN 200710063178 A CN200710063178 A CN 200710063178A CN 101237191 A CN101237191 A CN 101237191A
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ac
output
input
connected
switching
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CN 200710063178
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Chinese (zh)
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刘丛伟
斌 吴
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刘丛伟;吴 斌
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Priority to CN 200710063178 priority Critical patent/CN101237191A/en
Publication of CN101237191A publication Critical patent/CN101237191A/en

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Abstract

The invention relates to an AC to AC converter, belonging to the electric energy conversion technical field. The converter comprises a three-phase AC input connector which has three AC input terminals, a three-phase AC output connector which has three AC output terminals, a DC circuit which comprises two DC terminals and an energy storage component, a switch network which comprises three or two bridge arm circuit consisting of nine or six switch devices, with each bridge-arm circuit comprising three switch components and being connected to the corresponding AC input terminal and the corresponding output terminal, and a control system which is connected to the switch network for providing switching control signals for the switch devices to convert input AC electrical power from the input connector into output AC electrical power to the output connector, or to convert input AC electrical power from the output connector into output AC electrical power to the input connector. The invention utilizes a small quantity of asymmetric power switch components to convert input AC power into output AC power in a uniform or variable frequency operation mode.

Description

交流到交流变流器技术领域本发明属于电能转换技术领域,特别涉及交流到交流变流器的设计。 AC-to-AC converter Technical Field The present invention belongs to the current technical field power converter, and more particularly to the AC-AC converter design. 背景技术输入交流(AC)输出交流(AC)的电能转换在工业界大量存在,特别是三相双向AC/DC/AC (交流到直流到交流)变流器已经应用在电机驱动,发电系统,串联补偿器和不停电电源(UPS) 等。 BACKGROUND input alternating current (AC) output current (AC) power conversion in the presence of a large number of industries, especially a three-phase bi-directional AC / DC / AC (AC to DC to AC) converter is already used in the motor drive, the power generation system, series compensator and uninterruptible power supplies (UPS) and the like. 这种转换在输入(电网)側和输出(负载)侧提供了正弦波电流和可调功率因数。 This conversion input (grid) side and the output (load) side and provides a sinusoidal current adjustable power factor. 传统的三相双向AC/DC/AC变流器包括了由直流环节电抗连接的两个三相PWM逆变器,比如电容或者电感分别对应于电压型和电流型拓扑。 Conventional three-phase bi-directional AC / DC / AC converter comprises two three-phase PWM inverter is connected by a DC link reactance, such as inductive or capacitive type and are voltage corresponding to the current topology. 因为需要两次转换,这种变流器有时被称为两级逆变器,第一次转换是从三相交流到直流,第二次转换是从直流到三相交流输出。 Since conversion requires two such converters are sometimes referred to two inverters, the first three-phase alternating current is converted to direct current, the second conversion from DC to three-phase AC output. 其输出交流可变电压和可变频率。 AC variable output voltage and variable frequency. 然而,因为需要两次能量转换,传统两级变流器的能量转换效率低于单级转换。 However, since the energy conversion requires two, two conventional inverter power conversion efficiency is lower than single-stage conversion. 直接AC/AC 变流器针对效率进行设计,例如在AC/AC矩阵式变换器中三相输入交流能量直接传递到三相输出电压。 Direct AC / AC converter designed for efficiency, for example, a three-phase AC input power of AC / AC matrix converter is directly transmitted to the three-phase output voltage. 然而三相AC/AC矩阵式变流器需要18个功率开关管,同时需要复杂的换向开关控制以及吸收电路以避免输入侧短路和输出侧开路情况出现。 However, the three-phase AC / AC matrix converter requires power switch 18, while the need for complex commutation switching control circuit to avoid the absorption and shorting the input side and the output side open situation. 为减少开关管的数量出现了所谓的稀疏矩阵变换器,这种变换器对矩阵式变换器进行了修改,实质上采用交流到直流和直流到交流两级能量转换,体现了传统两级AC/DC/AC变流器和AC/AC矩阵式变流器之间的折中平衡。 Appears to reduce the number of so-called switch sparse matrix converter, this converter matrix converter is modified, using substantially AC to DC and DC to AC two energy conversion reflects the traditional two AC / DC / AC becomes a tradeoff between the current and AC / AC matrix converter. 这种稀疏矩阵变流器无需直流侧感性器件,通过特殊设计的PWM开关控制,可以降低输入侧开关的开关损耗,然而稀疏矩阵变流器设计上和两级AC/DC/AC变流器相比需要额外的三个开关器件和六个额外的二极管。 This sparse matrix converter without a DC inductive device side, the switching control by the PWM specially designed, can reduce the switching losses of the input side of the switch, but the sparse matrix converter design and two AC / DC / AC converter with than the need for additional three switching devices and six extra diodes. 与矩阵式变流器相比,稀疏矩阵变流器降低了开关管的数量,但是牺牲了效率,因此,需要一种改进的电能变流器设计来高效的从一种形式的交流电能转换为第二种形式的交流电能,同时无需大量的开关管和复杂的开关控制。 Compared with the matrix converter, a sparse matrix converter reduces the number of switching tubes, but at the expense of efficiency, therefore, a need for an improved power converter designed to efficiently from one form of AC power is converted to the second form of AC power, and without extensive and complex switch control switch. 发明内容本发明的目的是为克服已有技术的不足之处,提出一种交流到交流变流器,本发明可使用少量的不对称功率开关器件将输入交流功率在同频或变频的运行模式下转换成输出交流功率,能量可以双向流动,即也可以将来自输出连接的交流电功率转换成输入连接的交流电功率。 Object of the present invention is to overcome the shortcomings of the prior art, to provide a AC-AC converter, the present invention can use a small amount of an asymmetric power switching device with an input AC power or variable frequency mode of operation is converted into the output AC power, the energy flow can be bi-directional, i.e., may be converted from the AC power output is connected to the AC power input connector. 本发明提出一个交流到交流变流器,其特征在于,该变流器包括-一个三相交流输入连接具有第一,第二,和第三个交流输入端子以接收或提供三相交流电输入功率;一个三相交流输出连接具有第一,第二,和第三个交流输出端子以提供或接收三相交流电输出功率;一个直流电路包含第一和第二个直流端子和能量存储组件;一个开关网络包含总共九个开关器件形成三桥臂电路,每一个桥臂电路共有三个开关器件, 每一个桥臂电路连接到对应的交流输入端子和对应的交流输出端子,每一个桥臂电路包含第一个开关器件连接到对应的交流输入端子和第一个直流端子,第二个开关连接到对应的交流输入端子和对应的交流输出端子,和第三个开关连接到对应的交流输出端子和第二个直流端子;并且一个控制系统连接到开关网络,提供为开关器件开关控制信 The present invention provides an AC to AC converter, wherein the converter comprises - a three-phase AC input connection having first, second, and third AC input terminals to receive or provide a three-phase AC input power ; a three-phase AC output connection having first, second, and third AC output terminals to provide a three-phase AC power output or received; a DC circuit comprising first and second DC terminals and an energy storage component; a switch the network contains a total of nine switching devices forming three-leg circuit, each leg circuit has three switching devices, each arm circuit is connected to the corresponding AC input terminal and a corresponding AC output terminal, each circuit including a first arm a switching device connected to the corresponding AC input terminals and the first DC terminal, a second switch connected to the corresponding AC input terminal and a corresponding AC output terminal, and third switches connected to the AC output terminal and the corresponding two DC terminals; and a control system connected to the switching network, the switching control signal provided to the switch device 将来至输入连接的输入交流电功率转换到输出连接的输出交流电功率或将来至输出连接的输入交流电功率转换到输入连接的输出交流电功率。 AC power input to the future connection to the converter output AC power input connected to the output AC power or in the future to the converter output is connected to the output of the AC power input connections. 为对发明作基本的理解,特总结本发明的一个或多个特征如下-这里的总结并非对发明全面的评述,其目的既不是表明发明的特定要素,也不是确定发明的范围。 For the basic invention it will be understood that one or more features Laid summary of the present invention are as follows - summarized here is not a comprehensive disclosure of the commentary, which is intended to neither indicates a particular element of the invention, nor is the scope of the invention is determined. 摘要的主要目的是在详细说明之前提出发明的一些简要概念。 The main purpose is to present a summary of the invention in detail before some brief concepts. 所提出的发明涉及在单相或三相系统交流到交流之间能量的双向转换,中间采用直流电路,并应用于任何能量转换场合,包括并不限于UPS,电网电压调节器,电压恢复器,电机驱动,和特殊的电源应用,其中输出可以提供可变电压或/和可变频率,或固定电压和频率。 The proposed invention relates to a single or three phase AC system to bidirectional energy conversion, between the AC using an intermediate DC circuit, and is applicable to any power conversion applications, including but not limited to the UPS, a grid voltage regulator, voltage restorer, motor drive, and a special power supply applications, may be provided wherein the variable voltage output and / or variable frequency, or a fixed voltage and frequency. 根据发明的一个或多个特征,提出了一个九管三相交流到交流变流器,拓扑网络中采用九个开关形成三桥臂电路,其中每一个桥臂三个开关,用于把在三个输入端的输入交流功率转换成在三个输出端的交流输出功率,或反之。 In accordance with one or more features of the invention, a proposed nine three-phase AC to AC converter, a switch topology of a network is formed using nine-leg circuit, each bridge arm of which three switches for the three input AC power input terminals into AC output power at the output of the three, or vice versa. 桥臂电路各自连接到对应的输入和输出端子, 第一个开关连在输入端子和第一个直流端子之间,第二个开关连在输入端子和输出端子之间,第三个开关连在输出端子和第二个直流端子之间。 Each arm circuit is connected to the corresponding input and output terminals, a first switch connected between the input terminal and the first DC terminal, a second switch connected between the input terminal and the output terminal, a third switch connected in output terminal and the second DC terminal. 一个控制系统为开关提供信号用于将来自于输入连接的输入交流电功率转换到在输出连接的输出交流功率,或反之。 A control system to provide a signal for switching the AC power input from the input connection to output AC power converter connected to the output, or vice versa in. 在一个具体的实现中,为每一个桥臂电路提供一套信号来选择性的使桥臂电路处于三种状态之一,这三种状态包括第一种状态是将对应的输入和输出端子连接到第一个直流端子上,第二种状态时将输入和输出端子连接到第二种直流端子,第三种状态是将输入端子连接到第一个直流端子,将输出端子连接到第二个直流端子。 In a specific implementation, a signal is provided for each arm circuit selectively causes the arm circuit is in one of three states, the three states comprising a first state of the input and output terminals are connected to the corresponding to the first DC terminal, a second state when the input and output terminals connected to the second DC terminals, the input terminal of the third state is connected to the first DC terminal, an output terminal connected to the second DC terminals. 这里开关控制信号可以按照使连接到每个桥臂电路的输出端子端电压小于或等于同样桥臂上的输入端子端电压的原则提供。 Here the switching control signal may be provided in accordance with the output terminal is connected to the end of each arm circuit voltage is less than or equal to the voltage input terminal of the principle of the same bridge arm. 在某一种具体实现时,由控制系统利用正弦波脉冲宽度调制方法或空间矢量调制方法对控制信号进行脉冲宽度调制, 控制系统提供开关控制信号用于转换来自于输入的输入交流电功率到可变压或/和变频的输出交流电功率,或反之。 When a one particular implementation, the control signal is pulse width modulation with a sine wave pulse width modulation method or the spatial vector modulation method by the control system, the control system provides a switching control signal for converting the AC input power from the input to the variable pressure and / or frequency of the output AC power, or vice versa. 另外,所用的开关管可以是不对称器件只能在一个方向上阻断电压, 同时允许电流双向流动。 Further, the switch used may be an asymmetric device blocking voltage in only one direction, while allowing bidirectional flow of current. 本发明的一个或多个进一步的特征与九管三相交流到交流变流器相关,其中有包括共九个能够单向阻断电压允许双向电流流动的开关器件的一个开关网络。 One or more of the present invention is further characterized by the nine three-phase AC to AC converter associated, comprising a switching network which has a total of nine possible to allow bidirectional blocking voltage unidirectional current flow switching device. 变流器有一个控制系统连接到开关网络用于控制开关器件把来自于输入三个端子连接的输入交流电功率转换成在输出三个端子连接的输出电功率,或反之。 A converter control system is connected to a switching device for controlling the switching network from the input AC power is converted into three output terminals connected to the electrical power output terminal connected to three or vice versa in. 在一个可能的实现中,开关网络由三个桥臂电路构成,其中每一个桥臂电路有三个开关, 每一个桥臂电路连接到对应的输入输出端子对上。 In one possible implementation, the switching network is constituted by three arm circuits, wherein each circuit has three switch arm, each arm circuit is connected to the corresponding input-output terminal pair. 在一个实例中,控制系统为桥臂提供开关信号来选择第一种状态用于连接对应的输入和输出端子到第一个直流端子,第二种状态用于连接输入和输出端子到第二个直流端子,第三种状态用于连接输入端子到第一个直流端子, 连接输出端子到第二个直流端子。 In one example, the control system provides a switching signal to select a first arm connected to the corresponding state for the input and output terminals to the first DC terminal, a second state for connecting the input and output terminals to the second DC terminals, an input terminal connected to the third state to the first DC terminal, an output terminal connected to the second DC terminals. 本发明的其它特征提出了六个器件,单相交流到交流变流器,其中单相交流输入连接第一个和第二个输入端子,单相交流输出连接到第一和第二个输出端子, 一个直流电路由第一和第二个直流端子和能量存储器件组成。 Other features of the present invention proposes a device six single-phase AC to AC converter, wherein the single-phase AC input connection of the first and second input terminals, single-phase AC output is connected to the first and second output terminals , a direct current route of the first and second DC terminals and an energy storage device components. 一个实现包括总共六个开关器件形成两个桥臂电路,在每一个桥臂电路包含共三个开关器件,这里每一个桥臂连到对应的一个交流输入端子和对应的一个交流输出端子,在这个实现中,每一个桥臂的第一个开关器件连接在对应的输入端子和第一个直流端子之间,第二个开关连接到输入端子和输出端子之间,第三个开关连接到输出端子和第二个直流端子之间, 一个控制系统提供开关控制信号将连接到输入的单相交流输入功率转换到连接到输出的交流输出功率,或将来自输出连接的交流电功率转换成输入连接的交流电功率。 Implementation includes a total of six switching devices forming two leg circuits, each arm circuit comprising a total of three switching devices, where each arm is connected to a corresponding AC input terminal and a corresponding AC output terminal, at in this implementation, each of the first switching device is connected between the arm corresponding to the input terminals and the first DC terminal, a second switch connected between the input terminal and the output terminal, the third switch is connected to the output between the terminal and the second DC terminals, a control system provides switching control signals connected to the single-phase AC input power to the converter input connected to the output of the AC output power, or AC electrical power output from the converter is connected to the input connection of the AC power. 另外,在一个可能的实现中,开关网络包括了总共六个能够阻断单向电压允许电流双向流动不对称开关器件, 控制系统连接到幵关网络用于把来自于输入连接的输入交流电功率转换成连接到输出的输出交流电功率,或反之。 Further, in one possible implementation, the switching network can block comprising a total of six unidirectional voltage allows current to flow asymmetrical bidirectional switching devices, the control system is connected to a network for Jian off from the AC input power converter connected to the input to be connected to the output of the AC power output, or vice versa. 附图说明图1A是说明一个九管三相交流到交流变换系统实施例的原理图,显示了发明的一个或多个特征。 BRIEF DESCRIPTION OF DRAWINGS FIG 1A is a nine three-phase AC to AC conversion system schematic diagram of an embodiment showing one or more features of the invention. 图IB是说明一个带有六个不对称开关器件连接成一个双桥臂开关网络的单相.交流到交流变换系统实施例的原理图,显示了发明的进一步的特征。 FIG IB is a diagram illustrating the principles of the AC to AC conversion system diagram of an embodiment of a single-phase six asymmetrical switching devices are connected to a switching network with a double bridge arm., It shows a further feature of the invention. 图2A是一个来源于图1A和1B中变流器的单个桥臂电路的部分原理图,其中,第一个开关连接在对应的交流输入端子和第一个直流端子,第二个开关连接在输入端子和对应的交流输出端子,第三个开关连接在输出端子和第二个直流端子。 2A is a partial schematic view of one individual derived from FIGS. 1A and 1B arm circuit converter, wherein the first switch is connected to the corresponding AC input terminals and the first DC terminal, a second switch connected input terminals and the corresponding AC output terminal, and the third switch is connected between the output terminal and the second DC terminal. 图2B是一个表格,显示出实施例的图1A,1B和2A中变流器桥臂电路三态的开关操作,定义为:第一个状态把输入和输出端子连接到第一个直流端子,第二个状态把输入和输出端子连接到第二个直流端子,第二个状态把输入连接到第一个直流端子,把输出端子连接到第二个直流端子。 FIG 2B is a table showing the embodiment of FIG. 1A, the three-state converter arm switching circuit 1B and 2A change operation, is defined as: a first state of the input and output terminals connected to the first DC terminal, the second state the input and output terminals connected to the second DC terminal, a second input connected to the state of the first DC terminal, the output terminal is connected to the second DC terminals. 图3提供了一个图示的实施例的输入和输出调制波形和共享的载波波形,当图1A和图1B所示的变流器运行在不同调制比的正弦波脉宽调制下的同频(CF)操作模式。 Figure 3 provides an illustration of the input and output modulation waveforms of the embodiment and shared carrier waveform when the converter shown in FIGS. 1A and 1B operating at the same sinusoidal pulse width modulation ratio of different modulation frequency ( CF) mode of operation. 图4勾勒出一个图示的实施例的输入和输出调制波形和共享的载波波形,当图1A和图1B所示的变流器输入输出载波运行在调制比为O. 433时的正弦波脉宽调制下的变频(VF)操作模式。 Input and output modulation waveform 4 illustrated an outline view of an embodiment of the share and the carrier waveform when the converter shown in FIGS. 1A and 1B operating at the carrier input-output ratio of the modulation of the sinusoidal pulse O. 433 frequency (VF) mode of operation, width-modulated. 图5A和5B是输入和输出开关序列波形的图示,是图1A和图1B所示的变流器在一个单个脉宽调制周期内实施例的正弦波脉宽调制实现。 5A and 5B are diagrams illustrating input and output waveforms of the switching sequence, is a sine wave pulse width modulation converter FIGS. 1A and 1B shown in FIG embodiment in a single cycle of the pulse width modulation implementation. 图6是一个部分原理图给出了图1A和图1B所示的变流器实施例正弦波脉脉宽调制实现中变流器开关控制系统用以产生变流器任一个桥臂电路三个开关器件驱动信号的逻辑电路。 FIG 6 is a partially schematic shows the converter of FIG. 1A and FIG. 1B embodiment tenderness width modulation implementation sine converter switching control system for generating converter circuit according to any one of three bridge arms switching logic circuit device driving signal. 图7图示了图1A和图1B所示的变流器的图6所示逻辑电路的一套输入和输出信号。 Figure 7 illustrates a set of input and output signals of the logic circuit shown in FIGS. 1A and converter 1B shown in FIG. 6 FIG. 图8图示了一套在一个实现了图1A所示的三相交流到交流变流器同频运行模式的实验中的实施例桥臂电路门极驱动器开关信号。 8 illustrates an embodiment implemented in a bridge arm circuit to the gate experimental three-phase AC-AC converter shown in FIG. 1A with the pilot mode of operation, the source driver switch signal. 图9图示了在一个实现了图1A所示的三相交流到交流变流器同频运行模式的实验中的实施例的输入和输出电流波形。 9 illustrates one implementation of the input and output current waveforms of the embodiment of three-phase AC to AC experiment converter shown in FIG. 1A with a frequency in the operating mode. 图10A和10B分别图示了在一个实现了图1A所示的三相交流到交流变流器同频运行模式的实验中的输入和输出线电压和相电流曲线。 10A and 10B illustrate the experimental realization in a three-phase AC to AC converter shown in FIG. 1A with a frequency operating mode in line voltage and the input and output phase current curves. 图11A到11C图示了在一个实现了图1A所示的三相交流到交流变流器同频运行模式的对应超前,单位和滞后功率因数运行方式下的实验中的输入相电压和相电流曲线。 11A to 11C illustrate an implementation of the three-phase AC to AC converter with the frequency corresponding to the operating mode shown in advance 1A, the input phase voltages of the unit under test and a lagging power factor and the operating mode of the phase current curve. 图12图示了在一个实现了图1A所示的三相交流到交流变流器同频运行模式的实验中的输入相电压和输出相电流曲线,以表明当输入电压下降时输出可以实现电压恢复操作。 FIG. 12 illustrates one implementation of the three-phase AC input to the phase shown in FIG. 1A voltage and output phase current curves with the experimental frequency AC inverter operation mode to indicate that the output voltage can be achieved when the input voltage drops recovery operations. 图13A图示了在一个实现了图1A所示的三相交流到交流变流器变频(VF)运行模式的实验中的输入和输出相电压波形。 13A illustrates one implementation of the experiment in the AC to AC frequency converter (VF) operation mode shown in FIG. 1A-phase input and output phase voltage waveform. 图13B图示了在一个实现了图1A所示的三相交流到交流变流器变频运行模式的实验中的输入和输出线电压波形。 13B illustrates one implementation of the experiment shown in Figure 1A three-phase AC to AC converter in the variable frequency mode of operation of the input and output line voltage waveform. '图14A图示了在一个实现了图1A所示的三相交流到交流变流器变频运行模式的实验中的输入线电压和输入电流波形。 'In FIG 14A illustrates one implementation of the input line voltage and the input current waveform shown in FIG. 1A experimental three-phase AC to AC converter in the variable frequency mode of operation. 图14B图示了在一个实现了图1A所示的三相交流到交流变流器变频运行模式的实验中的输出线电压和输出电流波形。 FIG 14B illustrates one implementation of the output line voltage and the output current waveform shown in FIG. 1A experimental three-phase AC to AC converter in the variable frequency mode of operation. 图15图示了在一个实现了图1A所示的三相交流到交流变流器变频运行模式的实验中的输入相电压和相电流波形。 15 illustrates one implementation of the input phase voltage experiments shown in Figure 1A three-phase AC to AC converter in the variable frequency mode of operation, and phase current waveform. 图16图示了在一个实现了图1A所示的三相交流到交流变流器变频运行模式的实验中的输入和输出相电流波形。 16 illustrates one implementation of the experiment shown in Figure 1A three-phase AC to AC converter in the variable frequency mode of operation of the input and output phase current waveform. 图17A和图17B图示了在一个实现了图1A所示的三相交流到交流变流器变频运行模式的实验中当输出频率发生突变时的输入和输出线电压和相电流波形。 17A and 17B illustrate one implementation of the experiment shown in Figure 1A three-phase AC to AC converter in the variable frequency mode of operation when the input and output line voltage and phase current waveforms of the output frequency of mutation. 具体实施方式下面的描述和附图阐述了某些发明的详细直观的实现,仅表明发明原理可能的几个实施例实现方式,然而,并不是发明多个可能实现的穷举。 DETAILED DESCRIPTION The following description and the annexed drawings set forth in detail certain intuitive implementation of the invention, the principles of the invention may show only a few embodiments of implementations, however, it is not exhaustive of the invention a plurality of possible implementations. 发明的其它目的,优点和新特性如果与附图相关,将在下面的具体对发明的描述中阐述,其中:图1A显示一个九管交流到交流功率变流器或者功率变流器的实施例,说明发明的一个或多个特征,本实施例的功率变流器或者功率变流器10包括一个三相交流输入连接或电路20带有交流输入端子20a, 20b,和20c (端子A, B,和C)用于从一个三相输入电源70接收三相交流输入电功率,或向三相输入电源70提供三相交流电功率,以及一个三相交流输出连接或电路30带有输出端子30a, 30b,和30c (R, S,和T)用于提供三相交流输出电功率到三相负载80,或从三相负载80接收三相交流能量,还有一个直流电路40包含端子40a和40b (P和N)和能量储存组件例如一个直流电容Coc,在所举的例子中,输入电源70在原理图中表示为三相交流电压源VAs, VBS,和Vcs与输入端子A,B,和C通过串联阻感阻 Other objects, advantages and novel features if related to the drawings, will be set forth below in the detailed description of the invention, wherein: Figure 1A shows an embodiment of a nine AC to AC power converter or a power converter , one or more features described invention, the present embodiment is a power converter or a power converter 10 comprises a three-phase AC 20 with AC input connection or the circuit input terminals 20a, 20b, and 20c (terminals a, B , and C) for three-phase AC power supply 70 receiving input power from a three-phase input, or a three-phase three-phase AC input power source 70 provides power, and a three-phase AC output connection or circuit 30 with output terminals 30a, 30b , and 30c (R, S, and T) for providing an output power to a three-phase AC three-phase load 80, or 80 receives a load from the three-phase three-phase AC power, and a DC circuit 40 includes terminals 40a and 40b (P and N) and a DC energy storage components such as capacitors Coc, in the example illustrated, the input power source 70 is represented as a three-phase AC voltage source VAs, VBS, and Vcs input terminal a, B, and C in the schematic by a sense resistor in series resistance 抗组件U, Rsm LSB, RSB,和U, Rsc 分别连接。 Reactive component U, Rsm LSB, RSB, and U, Rsc are connected. 同时电源VAs, Vbs,和Vcs以"Y"型连接方式连接到一个共同的中点或节点"0", 虽然任何类型的三相交流输入电源70都可以连到输入20。 Meanwhile power VAs, Vbs, and Vcs to "Y" connector connected to a common mid-point or node "0", although any type of three-phase AC input power source 70 may be connected to the input 20. 输出连接30的端子R, S和T可以连到任何类型的三相负载80,图1A中实例为三个负载以"Y"型连接方式连接到一个共同的中点"m",并且实例中的负载表示为电感U和电阻R^串联负载,连接到输出R相,'电感L,s和电阻Rts串联负载,连接到输出S相,电感L,t和电阻Ru串联负载,连接到输出T相,虽然发明中的变流器可以为包括三相交流电机在内的任意类型负载供电。 An output terminal connected to the R 30, S and T may be attached to any type of three-phase load 80, as in FIG. 1A in Example load to three "Y" connector connected to a common mid-point "m", and examples of load represented as an inductor U and a resistor R ^ series with a load connected to the output of the R-phase, 'inductance L, s and a resistor Rts series with a load connected to the output of the S-phase, an inductor L, t, and resistors Ru series with a load connected to the output of the T phase, although the invention the converter comprises a three-phase AC motor can be of any type, including the load. 系统10也包括一个九管开关网络50包括一个总共九个开关器件S形成三个桥臂电路52a, 52b,和52c。 The system 10 also includes a nine switch network 50 comprises a total of nine switching devices S are formed three arm circuits 52a, 52b, and 52c. 每一个桥臂电路包括总共三个开关S,此时电路52a分别包含第一,第二,和第三个开关Sw, 和S„,电路52b分别包含第一,第二,和第三个开关Sw, SB2,和SB3,电路52c分别包含第一,第二,和第三个开关Su, SC2,和Sa。每个桥臂电路52连接到直流电路40 的正和负端子40a和40b上,并且也连接到一个相应的交流输入端子和相应的交流输出端子, 这里第一个桥臂电路52a连接到输入端子A 20a和输出端子R 30r,第二个桥臂电路52b连接到输入端子B 20b和输出端子S 30s,第三个桥臂电路52c连接到输入端子C 20c和输出端子T 30t。而且,如图1A所示,每个桥臂电路包含第一个开关器件(Sw, SB1, Su)连接在相应的输入端子(A, B, C)和第一个直流端子P 40a,第二个开关器件(S八2, SB2, SC2)连接在相应的输入端子和相应的输出端子(R, S, T),和第三个开关器件(S,3, SB3, SJ连接在输出端子和第二 Each arm circuit includes a total of three switches S, and the circuit 52a comprises a first, second, and third switches Sw, and S ", the circuit 52b comprises respectively a first, second, and third switches Sw, SB2, and SB3, respectively circuit 52c comprises a first, second, and third switches Su, SC2, and Sa. each arm circuit 52 is connected to the DC circuit 40, positive and negative terminals 40a and 40b, and is also connected to a respective alternating current input terminal and the corresponding AC output terminal, where the first arm 52a is connected to the circuit input terminal and the output terminal a 20a R 30r, the second arm circuit 52b is connected to the input terminal B 20b and an output terminal S 30s, the third arm 52c is connected to the circuit input terminal and the output terminal C 20c T 30t. Further, as shown, each arm circuit comprising a first switching device (Sw, SB1, Su) 1A connected to respective input terminals (a, B, C), and a first DC terminals P 40a, the second switching device (S eight 2, SB2, SC2) connected to the respective input terminals and respective output terminals (R, S, T), and third switching devices (S, 3, SB3, SJ and connected to a second output terminal 个直流端子40b(N)。任何类型的开关器件S都可用来选择第一个状态电气连接,第二个状态电气隔离,例如GTOs, IGBTs, IGCTs, (IEGT)等等(在图示的实例中为IGBTs),在图示的实例中, 单个开关器件S包括了反并联二极管Dw-DA3, DB1-DB3,和DCI-DC3,因此开关器件的电压阻断能力是单向或不对称的,运行中只能在一个方向阻断电压,允许电流双向流动,虽然发明本身并没有严格的要求。九管变流器10也包括一个控制系统60与开关网络50连接,为开关器件S提供开关控制信号SC把来自输入连接20的输入交流电功率转换成在输入连接30的输出交流电功率。任意类型的控制系统60都可以使用,例如逻辑,基于处理器的电路,基于可编程逻辑芯片CPLD或FPGA的电路,软件,固件,软硬件结合等等。为选择性的操作开关S以控制交流到交流转换,实例中系统60采用脉冲宽度调制(PWM)方 A DC terminal 40b (N). Any type of switching device S can be used to select the first state of the electrical connection and the second electrically isolated state, e.g. GTOs, IGBTs, IGCTs, (IEGT), etc. Examples of (in the illustrated for as IGBTs), in the illustrated example, the switching device S comprises a single anti-parallel diode Dw-DA3, DB1-DB3, and DCI-DC3, thus switching device voltage blocking capability is unidirectional or asymmetric, running only in one direction voltage blocking, allowing bidirectional flow of current, although the invention itself is not strictly required. nine converter 10 also includes a control system 50 is connected to the switching network 60 to provide switching control for the switching device S SC input signal from the input AC power connector 20 into the AC power input connected to the output 30. any type of control system 60 may be used, for example, logic, processor-based circuits based on programmable logic chip CPLD or FPGA circuits, software, firmware, a combination of hardware, etc. to selectively control the operation of the switch S to the AC to AC converter, example system 60 uses pulse width modulation (PWM) square 法来提供三套开关控制信号SC到开关网络50。在图示的例子中,第一个控制信号序列SCa, SCA2,和SCA3分别提供给第一套桥臂电路52a的开关Sw, SA2, and SA3,第二个控制信号序列SU, SCB2,和SCB3分别提供给第一套桥臂电路52b的开关SB,, SB2, and SB3,第三个控制信号序列SC", SCa,和SCa分别提供给第三套桥臂电路52c的开关S。 Method to provide three switching control signals SC to the switching network 50. In the illustrated example, the first control signal sequence SCa, SCA2, and SCA3 switch Sw supplied to the first set of arm circuits 52a, SA2, and SA3, a second control signal sequence SU, SCB2, and are supplied to the first set of SCB3 arm switching circuit 52b SB ,, SB2, and SB3, the third control signal sequence SC ", SCa, and are supplied to SCa the third circuit 52c sets a switch arm S. , SC2, and Se3。 , SC2, and Se3. 对图2A和2B下面作进一步的说明,在实例三相变流器10中,三种状态之一的信号用于将输入交流功率转化成在输出端子R, S,和T的输出功率。 2A and FIG. 2B further described below, in a three-phase inverter in Example 10, one of three states for the input signal is converted into AC power to the output terminals R, S, T, and power output. 此外,虽然在单方向'能量转换的背景下讨论,发明中的变流器可以用来双向转换能量。 Furthermore, although discussed in the context of energy transfer in one direction ', the invention may be used to bi-directional converter converting energy. 其中输出连接30可以互换成接收输入电能,输入连接20可以用于输出交流能量。 Wherein the output connector 30 may be interchanged to receive input power, the input connector 20 may be used to output AC power. 根据所提出的发明的另一个特征,图1B图示了另一种实施例交流到交流变流器110,这种六管单向实现从电源170接收正弦形交流输入电功率,或向电源170提供单相电功率,向单相负载180提供输出电功率,或从单相负载180接收单相电功率。 According to another feature of the proposed invention, Figure 1B illustrates another embodiment of the AC-AC converter 110 to the embodiment, the six-way receiver to achieve a sinusoidal AC input power from a power source 170, the power supply 170 or to provide single-phase power, provide output electrical power to single-phase load 180, load 180, or received from a single-phase single-phase electrical power. 单相变流器110包括一个单相交流输入连接120带有第一和第二个交流输入端子120a和120b (A和B)用于从电源170接收或提供单相交流输入电功率。 Single-phase current transformer 110 includes a single phase AC input connection 120 with first and second AC input terminals 120a and 120b (A and B) for receiving or providing single-phase AC input power from a power source 170. 这里实施例电源170为一个交流电压源VAs串联一个电源电感LsA和一个串联电阻RsA。 Example embodiments herein power source 170 is an AC voltage source in series with a supply inductance LsA VAs and a series resistor RSA. 单相变流器110包括一个单相交流输出连接130带有第一和第二个交流输出端子130r和130s(R和S)从负载提供或接收单相电功率,实施例负载170为电感U和电阻RLR串联负载,虽然包括单相电机在内的任意单相负载都可以应用。 Single-phase current transformer 110 includes a single phase AC output connection 130 of the first and second AC output terminals 130r and 130s (R and S) from the single-phase electric power with the load or receiver, embodiments of an inductive load 170 and U RLR load resistor in series, although any single phase load comprises a single-phase motor can be applied, including. 另外提供了一个直流电路140包括第一和第二个直流端子140a (P)和140b (N)以及能量存储组件(电容Coc),还有六管的开关网络150带有一对三管桥臂电路152a和152b。 Provides an additional DC circuit 140 includes first and second DC terminals 140a (P) and 140b (N) and an energy storage component (capacitor Coc), there are six switching network 150 with a pair of three arm circuits 152a and 152b. 如同在上述的三相变流器10中一样,在单相变流器110中六个开关器件S是带有反并联二极管的IGBTs,具有单向阻断电压和双向电流流动的特点,每个桥臂电路152包括3个开关器件S。 As in the above-described three-phase converter 10, the switching device S in the six single-phase converter 110 are IGBTs with anti-parallel diode having a characteristic way for bidirectional current flow and blocking voltage of each arm circuit 152 comprises a switching device 3 S. 此外每一个桥臂电路152连接到一个对应的交流输入端子(A或B)和一个对应交流输出端子(R或S),并包括第一个开关器件(Sw或Sw)连接对应的输入端子(A, B)和第一个直流端子140a (P),第二个开关器件(SA2 or SB2)连接对应的输入端子(A, B)和输出端子(R, S),第三个开关(SM, SM)连接输出端子(R, S)和第二个直流端子140b (N)。 In addition each arm circuit 152 is connected to a respective alternating current input terminal (A or B) and a corresponding one of the AC output terminal (R or S), and comprising a first switching device (or Sw Sw) connected to the corresponding input terminals ( a, B) and first DC terminals 140a (P), the second switching device (SA2 or SB2) connected to the corresponding input terminals (a, B) and an output terminal (R, S), the third switch (SM , SM) connected to an output terminal (R, S) and a second DC terminal 140b (N). 一个PWM开关控制系统160连接双桥臂开关网络150并提供开关控制信号SC到开关器件S用于将从连接120 来的输入功率转换成输出连接130的输出交流电功率,或反之。 A PWM switching control system 160 is connected Bridging arm switching network 150 and provides the switching control signals SC to the switching device 120 is connected from the S to the input power into an output AC power output connector 130, or vice versa. 在图2A和2B中,三相和单相变流器IO, 110的桥臂电路52, 152,以及所产生的一套开关控制信号SC可以以与在实施例系统IO, 110中的每一个单相桥臂电路52, 152相似的方式来将输入交流功率转化为输出交流,或反之,可工作在同频(CF运行模式输入输出频率相同)或在变输出频率(VF运行模式输出频率可以相对于输入频率发生变化)模式下。 2A and 2B, the three-phase and single-phase inverter IO, arm 110 of circuit 52, 152, and a switch control signal SC generated in the embodiment of the system may IO embodiment, each of the 110 single-phase bridge circuit 52, 152 in a similar manner to the input AC power into AC output, or vice versa, can operate at the same frequency (CF run mode input same output frequency) or variable output frequency (VF operating mode output frequency can be with respect to the input frequency changes) mode. 图2A图示了一个实施例桥臂52a, 152a,包括连接成图1A和1B方式的开关SA,-SA3,桥bi与分别对应的第一个输入和输出端子A和R连接,并连接直流端子P和N,其中其它的桥臂电路52, 152以类似的方式构造。 2A illustrates an embodiment of one case of arm 52a, 152a, comprising a switch connected to FIGS. 1A and SA 1B embodiment, -SA3, bi bridge connected to a corresponding first input and output terminals A and R, and connected to DC terminals P and N, where the other arm circuits 52, 152 constructed in a similar manner. 来自控制系统60, 160的对应的信号序列SC包括信号SCw, SCA2,和SC,3分别连接到桥臂电路52a, 152a的第一,第二,和第三个开关器件;SA2, and SA3,实施例变流^10, IIO中的其它的桥臂电路52, 152连接方式和进行下面将提到的三状态开关运行方式与第一个桥臂电路52a, 152a及其开关控制信号相似。 From the control system 60, a signal corresponding to the sequence SC 160 includes a signal SCw, SCA2, and SC, 3 are connected to the arm circuit 52a, a first, a second, and a third switching device 152a; SA2, and SA3, Example ^ converter embodiment 10, the other arm of the circuit 52 IIO, 152 and the connection will be mentioned below for three-state operation of the switch mode circuit and a first arm 52a, 152a and the switching control signal similar. 图2B显示的表格200说明由图IA所示的变流器IO, IIO中的控制系统60, 160所实现的实施例桥臂电路52a, 152a的三状态开关操作。 FIG 2B shows a table 200 illustrates the converter of the IO shown in FIG IA, a three-state of the control system 60 IIO, Example 52a the arm circuit implemented 160, 152a of the switching operation. 表格200定义了第一个状态对应开关Sw和Sw导通,SA3关断以连接输入和输出端子A和R到第一个直流端子P, 第二个状态对应开关Sw关断,SA2和Sm导通以连接输入和输出端子到第二个直流端子,第三个状态对应开关Sw和&3导通,SA2关断以连接输入端子A到直流端子P,输出端子到直流端子N。 A first table 200 defines the state of the corresponding switch Sw and Sw is turned on, SA3 turned off to connect the input and output terminals A and R to the first DC terminal P, the second state corresponding to the switch Sw is turned off, SA2 and Sm guide on to connect the input and output terminals to the second DC terminals, the third state corresponds to switch Sw is turned on, and & 3, SA2 is turned off to input terminal A is connected to the DC terminals P, N. DC terminal to an output terminal 针对图IA的三相变流器IO,下面介绍桥臂电路52和控制系统60以说明发明的不同概念, 其中图1B的单相实现110也以相似方式运行。 For a three-phase converter of FIG. IA is the IO, the following describes a control circuit 52 and the arm system 60 to illustrate the different concepts of the invention, wherein the single phase realize 110 of FIG. 1B also run in a similar manner. 在图1A的变流器10运行时,三相输入电流lA, Ib, 和Ic和输出电流IR, Is,和It分別受瑜入端子A, B和C以及输出端子R,S和T的电压控制,端子电压又受控制系统60控制开关控制信号SC处于图2B中显示的三种状态之一而控制。 In FIG. 1A converter 10 is operated, three-phase input current lA, Ib, and Ic and the output current IR, Is, It, and Yu are the terminals A, B and C, and the voltage output terminals R, S and T, by a control terminal voltage by the control system 60 in turn controls the switch control signal SC is in one of three states shown in FIG. 2B controlled. 以这种方式,输入能量的一部分被传递到了直流电路40,之后传递到输出80,其它的能量通过比传统背对背变流器数量更少的开关被从输入70直接转换到输出80,或反之。 In this manner, a portion of the input energy is transferred to the DC circuit 40, then transferred to the output 80, by other energy than conventional converter back to back fewer number of switches 70 is switched from the input 80 directly to the output, or vice versa. 在图示的实现中, 由控制系统60提供的脉冲宽度调制信号(PWM) SCw, SCA2,和SCA3(以及其它桥臂电路52b和52c的信号),利用显示在图2B中的表格200所示的实施例三状态开关方案,使得每个桥臂电路52连接的输出端子电压等于或小于同一桥臂上的输入端子,这里开关控制信号SC可以由任何开关技术提供,包括但不限于图中实施例的正弦波脉冲宽度调制或空间矢量调制(SVM),或其它开关方法。 In the illustrated implementation, the pulse width modulation signal provided by the control system 60 (PWM) SCw, SCA2, and SCA3 (arm circuits and other signals 52b and 52c), with the display in the table 200 shown in FIG. 2B Example of three-state switching scheme, so that each arm circuit 52 is connected to the output terminal of the voltage input terminal is equal to or smaller than the same bridge arm, where the switch control signal SC may be provided by any switching technique, including but not limited to the embodiment in FIG. Example sinusoidal pulse width modulation or space vector modulation (SVM), or other switching methods. 如下所述,图示的开关方案在保持给定桥臂电路的输出电压小于等于输入电压的情况下,通过为输入输出调制波形添加不同偏置或共模电压的方法利用对桥臂开关状态的控制,允许对输入和输出相电压分别控制。 As described below, the illustrated embodiment in a case where the switch to the output voltage of a given holding arm circuit, the input voltage or less, using state switch arm is biased by adding different methods or common-mode voltage of the input and output modulation waveform control, allows the input and output phase voltages are controlled. 而且,如下所述,通过控制系统60提供开关控制信号SC,变流器IO, 110可以工作在同频(CF)模式其中输入交流电功率在输出连接30被转换成同频的输出交流电功率,或变频(VF)模式其中输入交流电功率在输出连接30被转换成变频的输出交流电功率,或反之。 Further, as described below, the control system 60 is provided by the switch control signal SC, the converter IO, 110 can operate the input AC power at the output of which is connected with the frequency (CF) mode 30 is converted into AC power with an output frequency, or frequency (VF) mode in which the input AC power is converted into the output connector 30 of the inverter output AC power, or vice versa. 图3和4所示的图210和250说明了一种为控制变流器10的九个开关器件S的开关控制系统选用的脉冲宽度调制方案。 3 and 4 shown in FIG. FIGS. 210 and 250 illustrate a switch to control the converter control system 10, nine switching devices S of the pulse width modulation scheme chosen. 总的来说,输入和输出各自使用不同的调制波形,而载波波形相同以产生开关控制信号SC,此时,调制波形的幅值和频率决定或控制了所调制的.输入和输出波形性的幅值和频率。 In general, each using different input and output modulation waveforms and carrier waveforms to produce the same input and output waveforms of the switch control signal SC, time, amplitude and frequency modulated waveform determines the control or modulation of the amplitude and frequency. 图3中的图像210表示了实施例输入和输出调制波形分别为220和240, 和一个共同的三角载波调制波形230,用于表示不同调制系数(MI)下图1A和1B中变流器10, 110 处于正弦波脉冲宽度调制同频(CF)运行模式。 FIG 3 shows an embodiment of an image 210 input and output modulation waveforms 220 and 240 is implemented, and a common triangular wave carrier modulation 230 are used to represent different modulation coefficients (MI) FIGS. 1A and 1B converter 10 , 110 in the sinusoidal pulse width modulation with the frequency (CF) mode of operation. '而且,在图示的开关网络设计中,需要防止任一桥臂电路52中的输出端子电压超过输入端子电压。 'Further, in the switching network design illustrated, the output terminal voltage is necessary to prevent any of the arm of a bridge circuit 52 exceeds a voltage input terminal. 因此,实施例脉冲宽度调制开关控制方案引入了偏置或直流共模电压分量以确保输入相电压A, B,和C的调制波形220 (例如,Vma, Vmb, Vmc)在输入相电压(V, VBN, VCN)的变化范围内总是大于(或至等于)输出相R, S,和T的所有可能的输出相电压(VRN, VSN, VTN) 对应的输出调制波形240 (例如,Vmr, Vms, and Vmt) |这样确保每个桥臂电路上的输入电压总是大于等于输出电压,而且,实施例的输入和输出l制同相位(时间上),采用同一个载波波形即图3和4中的实施例三角载波230V。 Thus, embodiments of the pulse width modulation switching control scheme introduces a dc bias or to ensure that the common mode voltage component phase modulated waveform of the input voltage A, B, C, and 220 (e.g., Vma, Vmb, Vmc) phase input voltage (V , VBN, within the VCN) is always greater than the range (or equal to) the output phase R, S, and all possible output phase voltage T is (VRN, VSN, VTN) a corresponding output modulation waveform 240 (e.g., Vmr, Vms, and Vmt) | this ensures that the input voltage on each arm circuit is always greater than equal to the output voltage, and input and output phase prepared in Example l (time on), i.e., using the same carrier wave, and FIG. 3 Example 4 the triangular carrier 230V. r。 r. 图4中的图形250显示了当调制比MI为0.433时的实施例输入输出调制波形220和240,加上载波波形230产生图1A和1B中变流器10, IIO工作在变频(VF)模式时的正弦波脉冲宽度调制,此时输出交流频率不同于(高于)输入频率。 Graphic 250 in FIG. 4 shows the output when the modulation input modulation waveform ratio of 0.433 when the MI of Example 220 and 240, together with the carrier waveform 230 generates FIGS. 1A and 1B converter 10, IIO work (VF) mode in the frequency when the sinusoidal pulse width modulation, then the output AC frequency is different from (higher than) the input frequency. 在这个正弦波脉冲宽度调制实现中,每一个调制波形220, 240都和载波波形230相比,并以此产生变流器10的输入和输出波形,任何合适的脉冲宽度调制方案都可以应用于发明。 In this implementation, the sine wave pulse width modulation, each modulation waveform 220, and 240 are compared with the carrier waveform 230, and thus generates the converter input and output waveforms 10, any suitable pulse width modulation scheme may be applied invention. 例如可以利用波形发生电路产生图3和4表示的调制和载波波形220, 230, 240,再加上不同的偏置电压电路和两个比较电路来用单个调制信号220和240和载波230比较以产生信号送入逻辑电路,图6给出了逻辑电路的实施例即逻辑电路300。 For example, the waveform generating circuit 3 and FIG. 4 shows a modulation and carrier waveforms 220, 230, 240, coupled to a single modulated carrier signal 220 and 240 and 230 on different bias voltage circuit and the comparator circuit for comparing the two to generating a signal fed to the logic circuit, Figure 6 shows an embodiment of a logic circuit, i.e., the logic circuit 300. 另外,脉冲宽度调制可以用基于处理器的方法实现,并且图示的调制波形(载波波形),偏置和比较可以用软件,固件或其它数字逻辑实现。 Further, the pulse width modulation method can be implemented on the processor, and illustrates a modulated waveform (carrier wave), can be offset, and comparison implemented in software, firmware, or other digital logic. 在变流器10的同频或变频交流到交流运行中,控制系统60为输入调制波形220提供了正的直流偏移,为输出调制波形240提供了负的直流偏移,这些偏移或偏置的数值可以是任何方式实现的防止在任一个桥臂电路52上的输出电压超过输入电压。 In the converter 10 is the same or variable frequency AC to AC operation, the control system 60 for the input modulation waveform 220 provides a positive DC offset of the output modulation waveform 240 provides a negative DC offset, the offset or bias counter value may be implemented in any way prevent the output voltage on either arm of the circuit 52 exceeds the input voltage. 在图示的系统10中,不同的脉宽调制方案采用不同的偏移,这些偏移可以随着输入输出调制系数的变化而变化,或根据时刻不同而变化,也可以根据变流器10运行在同频或变频模式不同而变。 In the illustrated system 10, various pulse width modulation scheme different offsets, these offsets can vary as the input and output modulation index, or varies depending on time, can also run the converter 10 in the same or variable frequency mode becomes different. 在图示的同频实现(例如,图3)中,输入和输出调制波形220和240根据相互的相位差来决定电平偏移,以防止输出调制波形240超过输入调制波形220。 In the illustrated achieve the same frequency (e.g., FIG. 3), the input and output modulation waveforms 220 and 240 to determine the level shift, to prevent the output modulation waveform 240 exceeds the input modulation waveform 220 according to a mutual phase difference. 在这种情况下,如图3和4实施例波形显示,输入调制波形220 (例如,对三相输入波形Wma, Wmb,和Wmc)由下式(l)决定:Vm麵=Vd - Vip + VipSIN 0 , (1) 这里Vd是Coc之间的直流电路电压(图1A) Vip时任意时刻输入调制波形的峰值,其中三相A, B,和C的调制波形互相差120度(例如对单相变流器110为180度相差)。 In this case, as shown in Examples 3 and 4 show waveforms embodiment, the input modulation waveform 220 (e.g., three-phase input waveforms Wma, Wmb, and WMC) of the formula (l) is determined by: Vm surface = Vd - Vip + VipSIN 0, (1) where Vd is the DC voltage circuit (FIG. 1A) at any time during the peaks of the input modulation waveform between Vip Coc, wherein three phases a, B, C and modulated waveform difference of 120 degrees to each other (e.g. single phase current transformer 110 is 180 degrees out of phase). 另外输出调制波形240 (例如波形Wmr, Wms,和Wmt)由下式(2)决定: ' VmouTPUT = V叩+ VopSIN 6 , (2) 这里Vop时输出调制波形任意时刻的峰值,其中三相A, B,和C的调制波形互相差120度(例如对单相变流器110为180度相差)。 Further the output modulation waveform 240 (e.g. waveform Wmr, Wms, and Wmt) (2) determined by the following formula: 'VmouTPUT = V knock + VopSIN 6, (2) an output waveform of an arbitrary time peak modulation when Vop herein, wherein the A-phase , B, C and modulated waveform difference of 120 degrees to each other (for example, single-phase current transformer 110 is 180 degrees out of phase). 在这点上,发明人考虑到在同频运行模式时输入输出相位差的不同所需的直流电压Vd的最小值会发生变化,此时实现时最好能限制输入到输出的相位差。 In this regard, the inventors contemplate vary at different minimum input phase of the desired output frequency at the same time the operating mode of DC voltage Vd, when this time is preferably implemented to limit the input to the output of the phase difference. 在一个实施例三相变流器10的变频(VF)实现中(例如图4),输入调制波形220 (例如, 波形Wma, Wmb,和Wmc)的直流偏移由下式(3)给出: (3Vd/4) + VipSIN 6 ,, (3)输出调制波形240 (例如波形Wmr, Wms,和Wmt)可以由下式(4)给出: (Vd/4) + VopSIN e 2, (4)这里0t和0 2可以以不同频率变化。 In one embodiment the three-phase frequency converter 10 of the embodiment (VF) implementation (e.g., FIG. 4), 220 (e.g., waveforms Wma, Wmb, and WMC) modulation waveform of the DC input offset is given by the following formula (3) : (3Vd / 4) + VipSIN 6 ,, (3) output modulation waveforms 240 (e.g. waveform Wmr, Wms, and Wmt) can be given by the following formula (4): (Vd / 4) + VopSIN e 2, (4 ) where 0t and 02 may be varied at different frequencies. 这样如图3和4所示,最小的输入调制波形221和最大的输出调制波形246是一条曲线,但是采用上述偏置,实施例脉冲宽度调制方案中输入调制波形220总是大于或等于输出波形240 。 Thus as shown in Figure 3 and 4, the minimum and maximum input modulation waveform 221 of the output modulation waveform 246 is a curve, but using the bias, a pulse width modulation scheme embodiment the input modulation waveform 220 is always greater than or equal to the output waveform 240. 图5A和5B图示的控制系统60在控制器60中实现了实施例正弦波脉冲宽度调制开关序列, 该序列在每一个PWM周期可以分成7个开关或换向段(每一个开关模式周期中7段序列)。 5A and 5B illustrate the control system 60 embodiments that implement a sinusoidal pulse width modulation controller 60 in the switching sequence, the sequence at each PWM cycle may be divided into seven segments or commutated switches (mode switching each cycle segment 7 sequence). 图5A 图示了实施例图形260.图5B图示了图形270,实施例情况给出了当载波230的频率远大于调制波形220, 240典型一个开关周期范围情况。 Example 5A illustrates a graphical embodiment 260. Figure 5B illustrates a pattern 270, shows the case of the embodiment 230 is much larger than when the frequency of the carrier modulation waveform 220, a switch 240 typically scope of the cycle. 这里图形260和270为了方便说明以输入调制波形Vma, Vmb,和Vmc和输出波形Vmr, Vms,和Vmt为常数为例,脉冲宽度调制也可用5段法, 3段法或其它方法实现。 Here the graphics 260 and 270 for convenience of explanation the input modulation waveform Vma, Vmb, and Vmc and output waveforms Vmr, Vms, and Vmt is constant, for example, a pulse width modulation method can also be 5 segments, three stage method, or another method. 并将所需的输入和输出波形V洲VBN, Vcn,和VRN, Vsn, VTN ,分别显示在图形260和270, 当对应的调制波形高于载波230时,实际输入输出波形为高,这样需要的输入和输出波形的宽度就取决于调制和载波波形,三相的输入和输出调制器220和240可以相应的进行相移。 And the required input and output waveforms V Island VBN, Vcn, and VRN, Vsn, VTN, and 260 are displayed in the graph 270, when the corresponding carrier modulated waveform 230 is higher than the actual input and output waveforms is high, this requires the width of the input and output waveforms and carrier waveforms depends on modulation, three phase input and output modulator 220, and 240 may correspond to a phase shift. 这样, 例如使用比较器电路(未画出)或采用软件通过将各自的输入和输出调制波形220, 240与载波230比较,可以得到输入和输出波形。 Thus, for example using a comparator circuit (not shown) or by using software 220, 240 compares the respective input and output with the carrier modulation waveform 230, input and output waveforms can be obtained. 在图5A图示的例子中,所需的第一相输入L从时刻TIl 到TI6为高,l从TI2到TI5为高,VcN从TI3到TI4为高。 In the example illustrated in FIG. 5A, the first phase input required from time L to TI6 high TIl, l TI5 from high to TI2, TI3 VCN from high to TI4. 与此类似,图5B的输出图形270所需的V刚从时刻T01到T06为高,V^从T02到T05为高,VTN 从T03到T04为高。 Similarly, the output pattern of FIG. 5B just 270 V required time T01 to T06 is high, V ^ from T02 to T05 is high, VTN from T03 to T04 is high. 图6和7显示对每一个桥臂电路,可以提供一个逻辑电路300 (图6),其输入时对应桥臂输入和输出所需信号波形(例如,对第一个桥臂52a为所需的桥臂输入^和桥臂输出L),其输出产生对应于桥臂电路52的开关控制信号SC(例如,对第一个桥臂52a为SU, SCA2,和SCA3)。 Figures 6 and 7 show each arm circuit, a logic circuit 300 may be provided (FIG. 6), corresponding to the desired input and output arm when its input signal waveform (e.g., the first arm 52a of a desired ^ input arm and the output arm L), which corresponds to the output circuit 52 generating arm switching control signal SC (for example, a first arm 52a of SU, SCA2, and SCA3). 这里每一个桥臂电路52需要单独的电路300。 Where each arm circuit 52 requires a separate circuit 300. 作为变通,用来驱动桥臂电路52的电路300的逻辑所定义的功能可以以固件,软件等方式实现。 As an alternative, the drive arm to the function circuit 52 of the logic circuit 300 may be implemented as defined in firmware, software, or the like. 图7的图片320显示了第一套实施例开关控制信号SU, SCA2,和SCM,这里控制系统60提供的开关逻辑在所显示的图5A到7中的开关周期中产生7个开关段S1-S7(S3-S5段为状态l)分别出现不同的开关状态2, 3, 1, 3,和2。 FIG image 3207 shows a first embodiment of a switching control signal SU embodiment, SCA2, and SCM, where the control logic 60 switches provided in the switch section 7 to generate the switching period shown in FIG. 5A to 7 in S1- S7 (S3-S5 segment state l) appeared different switching states 2, 3, 1, 3, and 2. 图5A-7中的例子显示了用于图1A中三相变流器10的正弦波脉冲宽度调制方法,根据发明该方法也可以应用于图1B的单相实现110中。 The example in FIG. 5A-7 show a three phase sine wave pulse width modulation method used in FIG. 1A converter 10 according to the invention may also be applied to the method of FIG. 1B single phase 110 implemented. 其它的对调制波形进行一个或多个修改的正弦波PWM方法也可以使用,比如,当三次谐波成分加入基本或基波正弦形,合成的波形用载波来调制(例如,三角波或其它),这里所有如此的变化都被认为是正弦脉冲宽度调制的等效形式纳入专利的范围,无论调制波形是否是纯粹的正弦形状。 Performing one or more further modifications to the sine wave PWM modulation method may also be used, for example, when the third harmonic component added to the basic or fundamental sinusoidal synthesized waveform modulated carrier wave (e.g., triangular or other), all such variations are considered equivalent here in the form of a sinusoidal pulse width modulation range into the patent, regardless of whether the modulation waveform is a pure sinusoidal shape. 而且,其它的脉宽调制技术也可以使用,比如,空间矢量调制(SVM)产生的开关状态序列或模式的产生通过一个参考旋转矢量在空间矢量图中定义,采用特定的模式或状态序列,根据目前参考矢量的位置确定对应的矢量持续时间,通过选择合适的开关状态和持续时间计算来确保各桥臂电路52的输入端电压等于或高于对应输出端电压。 Further, other pulse width modulation techniques may be used, for example, to generate a space vector modulation (SVM) switching state sequence or pattern generated by the rotation vector is defined in a reference space vector, the use of sequence specific mode or state, in accordance with determining the current position of the reference vector corresponding to the duration of the vector, by selecting the appropriate switch state, and calculated to ensure that the duration of each input voltage arm circuit 52 is equal to or higher than the voltage corresponding to the output terminal. 而且,像图1B中的变流器110那样的单相实现可以通过等效的脉冲宽度调制或其它的开关技术实现,两个桥臂电路的开关信号序列需要彼此相差180度,通过合适的调制偏置或调整来使单个桥臂电路152的输出端子电压等于或小于对应的输入端子。 Further, like that in FIG. 1B single converter 110 may be implemented to achieve the equivalent phase pulse width modulation techniques or other switches, the switch signal sequence requires two arm circuits differ from each other by 180 degrees, by suitable modulation or offset adjusting circuit 152 so that a single arm of equal or less than the output terminal voltage corresponding to the input terminal. 在图8-17中,图1A中所示的三相交流到交流变流器的一个7.5KVA的样机进行了同频(CF) 模式和变频(VF)模式的实验。 In Figure 8-17, the three-phase alternating current as shown in FIG. 1A to AC converter prototype of a 7.5KVA experiments conducted with the frequency (CF) mode and a frequency (VF) mode.实验中,输入线电压的有效值(例如Vab)为208V,电源电感Ls为2.5raH,输出负载为三相电阻电感负载,电阻为14.6欧姆,电感为2.5mH,直流电容Coc电容值为2350 uF,采用采样频率fsw为3. 24 kHz空间矢量调制PWM方案。输入电源频率为60Hz, 输入侧使用线电压定向的闭环矢量控制系统以控制输入侧电流,输入侧采用开关电压控制。在所实验的同频(CF)运行中,输入和输出电压波形接近同相,直流电路电压Vd保持在360V 左右,对应的输入和输出调制系数为0.8左右。在同频时,图8中图形400显示了一套变流器10实验装置上的实施例桥臂电路开关门极驱动信号SCw, SCA2,和SCA3。图9中图形410分别显示了实施例输入和输出电流波形lA and IR, 在变流器10同频运行中,输入和输出电流波形接近正弦波,输出电流有很小的滞后功率因数。图10A和10B分别给出了图形420和430,分别显示出输入和输出线电压(VA8和VRS)和相电流图形(IA和IR)的实验波形,在同频运行中输入和输出线电压波形都包含同样的直流电路电压Vd的波形。图11A-11C中有图形440, 450和460分别显示了在实验装置同频运行时,对应输入侧超前,单位,和滞后功率因数的情况下,输入线电压和相电流(VAs和I》。图11A-IIC中的图形显示了实施例实验变流器10具有输入侧可调功率因数的能力,并且输入功率因数的变化对输出功率因数没有影响,表明所发明的变流器系统10可以适应补偿低功率因数负载的要求。图12所示的图形470中分别显示了输入线电压和输出相电流,表明当输入电压下降时,系统IO具有调节能力可以保持输出电流IK。对变频(VF)运行模式,交流到交流变流器的实施例性能显示在图13A-17中,其中输入和输出调制比都为0.4左右。图13A包括了图形500分别显示出输入和输出相电压曲线VM and Vrn,(输入频率为60Hz。 1图13B中的图形510显示出输入和输出线电压曲线(VAB and VRS),可以看出,输入频率为60Hz,输出频率为3 0Hz。图13A可以清楚的看出,即使输出电压的幅值和频率发生变化,输出电压V^总是小于或等于输入电压L 。图14A和14B分别显示输入和输出线电压和相电流曲线V,b, L, VRS, and IR,这里输出频率也是30Hz。图15中的图形540分别显示出输入相电压和相电流曲线VAs和IA。图16给出了图形550分别显示出在变流器10的不同频率下输入和输出相电流lA和IR。图17A的图形560和图17B的图形570分别显示了实施例当输出频率从120Hz变化到30Hz时三相变流器10中的输入和输出线电压V,B和VRS,以及输入和输出电流lA和IR,此时当输出频率调节动态时,输入电流和电压波形L和V,B基本上不受扰动。这样,发明可以发现多种应用领域, 包括要求以变幅值或/和变频率方式转换输入交流功率到输出交流功率,但不需要像背对背变流器或矩阵式变流器那样的成本,体积,和复杂度。本发明只需九个开关器件来转换三相交流功率,六个开关器件来转换单相交流功率。上述实施例仅用来表明所提出的发明的多个方面其中的几个可能的实现,在阅读和理解了本说明和附图后,等效的变化和/或修改对本行业的其它人是显而易见的。特别对关于上面描述的组件(集合,器件,开关器件,系统,电路,和类似的)所执行的各种功能,用来描述该组件的术语(包括对"方法"的引用)也会用来描述任何组件,除非特殊指出,例如硬件,软件,或两者的结合,只要能够完成所描述的组件的特殊功能(也就是说,功能上等效), 即使和在发明图示实现中披露出的完成功能结构在结构上不等效也有效。另外,虽然发明的某个特征只以几个实现中的一个来披露,这些特征可以和其它实现的一个或多个其它特征结合后可能满足任何给定或特定的应用和具有优势。并且,对于详细说明和/或在要求中的术语"包括","具有","有","带有",或其它的变化,与"包含" 同义。

Claims (22)

1. 一个交流到交流变流器,其特征在于,该变流器包括: 一个三相交流输入连接具有第一,第二,和第三个交流输入端子以接收或提供三相交流电输入功率; 一个三相交流输出连接具有第一,第二,和第三个交流输出端子以提供或接收三相交流电输出功率; 一个直流电路包含第一和第二个直流端子和能量存储组件; 一个开关网络包含总共九个开关器件形成三桥臂电路,每一个桥臂电路共有三个开关器件,每一个桥臂电路连接到对应的交流输入端子和对应的交流输出端子,每一个桥臂电路包含第一个开关器件连接到对应的交流输入端子和第一个直流端子,第二个开关连接到对应的交流输入端子和对应的交流输出端子,和第三个开关连接到对应的交流输出端子和第二个直流端子;并且一个控制系统连接到开关网络,提供为开关器件开关控制信号将来 1. An AC to AC converter, wherein the converter comprises: a three-phase AC input connection having first, second, and third AC input terminals to receive or provide a three-phase AC input power; a three-phase AC output connection having first, second, and third AC output terminals to provide a three-phase AC power output or received; a DC circuit comprising first and second DC terminals and an energy storage component; a switching network comprising a total of nine switching devices forming three-leg circuit, each leg circuit has three switching devices, each arm circuit is connected to the corresponding AC input terminal and a corresponding AC output terminal, each circuit comprising a first arm switching devices connected to the corresponding AC input terminals and the first DC terminal, a second switch connected to the corresponding AC input terminal and a corresponding AC output terminal, and third switches are connected to a corresponding AC output terminal and a second direct current terminals; and a control system connected to the switching network, the switching device provides a switching control signal in the future 至输入连接的输入交流电功率转换到输出连接的输出交流电功率,或将来至输出连接的输入交流电功率转换到输入连接的输出交流电功率。 AC power input to the input connection to output AC power converter output connections, the AC input power to or future output connected to the converter output AC power input connections.
2、 如权利要求l所述的变流器,其特征在于,所述控制系统为开关网络提供三套开关控制信号,每一套提供给对应的一个桥臂电路,控制系统控制每套开关控制信号处于三种状态中的一种,包括第一个状态连接对应的输入和输出端子到第一个直流端子,第二个状态连接输入和输出端子到第二个直流端子,和第三个状态连接输入端子到第一个直流端子,连接输出端子到第二个直流端子。 2. The converter according to claim l, wherein said control system provides three sets of switching control signal of the switching network, each set to the corresponding arm of a circuit, the control system controls each switch control signal is in one of three states including a first state of the corresponding input and output terminals connected to the first DC terminal, a second input and output terminals connected state to the second DC terminals, and a third state an input terminal connected to the first DC terminal, an output terminal connected to the second DC terminals.
3、 如权利要求2所述的变流器,其特征在于,所述每一套开关控制信号包括第一,第二,和第三个开关控制信号分别连接到对应桥臂的第一,第二,第三个开关器件,定义第一和第二各开关器件导通,第三个开关器件关断为第一个状态,第一个开关器件关断,第二和第三个开关器件导通为为第二个状态,第一和第三个开关器件导通,第二个开关器件关断为第三个状态。 3, converter as claimed in claim 2, wherein each of said first set of switch control signals comprises a first, second, and third switching control signals are connected to the corresponding arm, the first second, third switching devices, each defining a first and a second switching device is turned on, the third switching device is turned off for the first state, the first switching device is turned off, the second and the third switching device is turned for the second state to pass the first and third switching devices turned on, the second switching device is turned off for the third state.
4、 如权利要求l所述的变流器,其特征在于,所述控制系统提供三套开关控制信号连接到开关网络,每一套用于控制对应的一个桥臂电路,开关控制信号中的每一套包含第一,第二和第三个开关《言号分别连接到对应桥臂上的第一,第二和第三个开关器件,第一和第二各开关器件导通,第三个开关器件关断形成第一个状态,第一个开关器件关断,第二和第三个开关器件导通形成第二个状态,第一和第三个开关器件导通,第二个开关器件关断形成第三个状态。 4. A converter according to claim l, wherein said control system provides three sets of switching control signals is connected to the switching network, each set corresponding to a control arm circuits, each of the switching control signal comprising a set of first, second and third switch "statement number are connected to the corresponding bridge arm first, second and third switching devices, each of the first and second switching device is turned on, the third oFF switching device form a first state, the first switching device is turned off, the second and third switching devices turned on to form a second state, the first and third switching device is turned on, the second switching devices forming a third oFF state.
5、 如权利要求l所述的变流器,其特征在于,所述开关控制信号由控制系统提供以保持连接到每一个桥臂电路的输出端子电压等于或低于连接到同一个桥臂电路上的输入端子。 5. The converter according to claim l, wherein said switch control signal provided by the control system remain connected to each arm circuit output terminal voltage is equal to or lower than a bridge arm connected to the same circuit on the input terminal.
6、 如权利要求l所述的变流器,其特征在于,所述开关控制信号由控制系统利用正弦波脉冲宽度调制或空间矢量调制方法脉冲宽度调制而成。 6. A converter according to claim l, wherein said switch control signal by a modulation control system using sinusoidal pulse width modulation or space vector pulse width modulation method.
7、 如权利要求l所述的变流器,其特征在于,所述控制系统提供开关控制信号从输入连接的输入交流电功率转换到输出连接的同频或变频输出交流电功率,从输出连接的输入交流电功率转换到输入连接的同频或变频输出交流电功率。 7. The converter of claim l input from the output connection of the preceding claims, characterized in that said control system provides the switching control signal input AC power from the input connection to an alternating current power converter connected to the same output frequency or output frequency, AC input power converter connected to the same or variable frequency output AC electrical power.
8、 如权利要求l所述的变流器,其特征在于,所述开关器件只能单方向阻断电压;允许电流双向流动。 8. A converter according to claim l, characterized in that the switching device blocking voltage in one direction only; allowing bidirectional flow of current.
9、 一个交流到交流变流器,其特征在于,该变流器包括:一个三相交^t输入连接具有第一,第二,和第三个交流输入端子以接收或提供三相交流电输入功率:一个三相交流输出连接具有第一,第二,和第三个交流输出端子以提供或接收三相交流电输出功率:一个直流电路包括第一和第二个直流端子和一个能量存储组件;一个开关网络包括总共九个开关器件,该器件只能单方向阻断电压,允许电流双向流动,该开关网络连接到所谓的交流输入和输出连接和所谓的直流电路;一个控制系统与开关网络连接用于控制开关器件把来自于输入连接的输入交流电功率转换成输出连接上的输出交流电功率,或把来自于输出连接的输入交流电功率转换成输入连接上的输出交流电功率。 9, an AC to AC converter, wherein the converter comprises: a three-phase input connection ^ t having a first, second, and third AC input terminals to receive or provide a three-phase AC input power : a three-phase AC output connection having first, second, and third AC output terminals to provide a three-phase AC power output or received: a DC circuit comprising first and second DC terminals and an energy storage component; a switching network including a total of nine switching devices, the device blocking voltage in one direction only, allowing bidirectional flow of current, the switching network is connected to a so-called AC input and output connections and a so-called DC circuit; a control system connected to the switching network switching means for controlling the power input from the input AC into an output connected to an alternating current power at the output connection, or converting an input AC power output from the AC power output is connected to the input connection.
10、 如权利要求9所述的变流器,其特征在于,所述开关网络有三个桥臂电路构成,每个桥臂电路共有三个开关器件,每一个桥臂电路连接到一个对应的交流输入端子和一个对应的交流输出端子,(第一和第二各直流端子),控制系统为开关网络提供三套开关控制信号,每一套提供给对应的一个桥臂电路,控制系统控制每套开关控制信号处于三种状态之一,包括第一个状态连接对应的输入和输出端子到第一个直流端子,第二个状态链接输入和输出端子到第二个直流端子,和第三个状态连接输入端子到第一个直流端子,连接输出端子到第二个直流端子。 10, converter as claimed in claim 9, characterized in that the switching network has three arm circuits, each circuit has three arm switching devices, each arm circuit is connected to a corresponding AC input terminals and a corresponding AC output terminal, (each of first and second DC terminals), the control system provides three sets of switching control signal of the switching network, each set provided to a corresponding arm circuits, each control system the switching control signal is in one of three states including a first state of the corresponding input and output terminals connected to the first DC terminal, a second input and output terminals linked state to the second DC terminals, and a third state an input terminal connected to the first DC terminal, an output terminal connected to the second DC terminals.
11、 如权利要求io所述的变流器,其特征在于,所述控制系统控制开关器件保持连到每个桥臂电路中的输出端子其电位等于或小于连接到同样桥臂的输入端子。 11. The converter according io claim, wherein said control system controls the switching device remains connected to the output terminal of each bridge arm circuit which is equal or less than the potential of the input terminal is connected to the same bridge arm.
12、 如权利要求9所述的变流器,其特征在于,所述控制系统为开关网络提供了脉冲宽度调制开关控制信号,用正弦波脉冲宽度调制或空间矢量调制方法控制开关器件。 12, converter as claimed in claim 9, characterized in that said control system provides pulse width modulation switching control signal of the switching network, controlling the switching device with a sinusoidal pulse width modulation or space vector modulation method.
13、 如权利要求9所述的变流器,其特征在于,所述控制系统提供了开关控制信号以控制来自于输入连接的输入交流电功率转化成在输出连接的变频输出交流电功率,或控制来自于输出连接的输入交流电功率转化成在输入连接的变频输出交流电功率。 13, converter as claimed in claim 9, characterized in that said control system provides switching control signals to control the power input from the AC input connector converted into AC power output from the inverter output connections, control or AC input power is converted to an output connected to the inverter output AC power input connections.
14、 一个交流到交流变流器,其特征在于,该变流器包括-一个单相交流输入连接具有第一个和第二个交流输入端子以接收或提供交流电输入功率;一个单相交流输出连接具有第一和第二个交流输出端子以提供或接收单相交流电输出功率;一个直流电路包含第一和第二个直流端子和一个能量存储组件;一个开关网络包括总共六个开关器件形成两个桥臂电路,每一个桥臂电路共有三个开关器件, 每一个桥臂电路连接到对应的交流输入端子和对应的交流输出端子,每一个桥臂电路包含了第一个开关器件连接对应的交流输入端子和第一个直流端子,第二个开关连接对应的交流输入端子和交流输出端子,和第三个开关连接对应的交流输出端子和第二个直流端子;并且一个控制系统连接到开关网络,为开关器件提供开关控制信号以将来自输入连接的输入交流 14, an AC to AC converter, wherein the converter comprises - a single-phase AC input connection having first and second AC input terminals to receive or provide input AC power; a single-phase AC output connector having a first and a second AC output terminals to provide a single-phase AC electrical output power or the reception; a DC circuit comprising first and second DC terminals and an energy storage component; a switching network includes a total of six switching devices forming two arm circuits, each circuit has three arm switching devices, each arm circuit is connected to the corresponding AC input terminal and a corresponding AC output terminal, each arm circuit comprising a first switching device connected to the corresponding AC input terminals and the first DC terminal, a second switch connected to the corresponding AC input terminal and the AC output terminal, and third switches connected to the corresponding AC output terminal and a second DC terminals; and a switch connected to the control system network, the switching device provides an input AC signal from the switching control input connection 功率转换到输出连接的输出交流电功率,或将来自输出连接的输入交流电功率转换到输入连接的输出交流电功率。 The power converter is connected to the output of the AC power output or the alternating current input power from the converter output is connected to the output of the AC power input connections.
15、 如权利要求14所述的变流器,其特征在于,所述控制系统提供两套开关控制信号到开关网络,每一套提供给对应的一个桥臂电路,控制系统控制每一套开关控制信号处于三种状态之一,包括第一个状态连接输入和输出端子到第一个直流端子,第二个状态连接输入和输出端子到第二个直流端子,和第三个状态连接输入端子到第一个直流端子,连接输出端子到第二个直流端子。 15, converter as claimed in claim 14, characterized in that said control system provides two sets of switching control signals to the switching network, each set to the corresponding arm of a circuit, a switch control system controls each of the the control signal is in one of three states including a first state connects the input and output terminals to the first DC terminal, a second input and output terminals connected state to the second DC terminals, and a third input terminal connected state to the first DC terminal, an output terminal connected to the second DC terminals.
16、 如权利要求14所述的变流器,其特征在于,所述控制系统为开关网络提供了脉冲宽度调制开关控制信号,用正弦波脉冲宽度调制或空间矢量调制方法控制开关器件。 16, converter as claimed in claim 14, characterized in that said control system provides pulse width modulation switching control signal of the switching network, controlling the switching device with a sinusoidal pulse width modulation or space vector modulation method.
17、 如权利要求14所述的变流器,其特征在于,所述控制系统提供了开关控制信号将来自输入连接的输入交流电功率转换成在输出连接的变频输出交流电功率,或将来自输出连接的输入交流电功率转换成在输入连接的变频输出交流电功率。 17, converter as claimed in claim 14, characterized in that said control system provides the switching control signal from the input AC power input connected to the frequency converting AC power output is connected to the output, or from the output connector the variable frequency AC input power into AC output power input connections.
18、 如权利要求l所述的变流器,其特征在于,所述开关器件只能单方向阻断电压,允许电流双向流动。 18. The converter according to claim l, characterized in that the switching device blocking voltage in one direction only, allowing bidirectional flow of current.
19、 一个交流到交流变流器,其特征在于,该变流器包括:一个单相交流输入连接具有第一和第二各交流输入端子以接收或提供单相交流电输入功率; 一个单相交流输出连接具有第一和第二个交流输出端子以提供或接收单相交流电输出功率;一个直流电路包含第一和第二个直流端子和一个能量存储组件;一个开关网络包括总共六个开关器件,所谓的开关器件只能在单方向阻断电压,允许电流双向流动,所谓的开关网络连接到所谓的交流输入和输出连接和所谓的直流电路;并且一个控制系统连接到开关网络以控制开关器件将来自于输入连接的输入交流电功率转换到输出连接的输出交流电功率,或将来自于输出连接的输入交流电功率转换到输入连接的输出交流电功率。 19, an AC to AC converter, wherein the converter comprises: a single-phase AC input connection having first and second input terminals to receive respective AC or provide a single-phase AC electrical input power; a single-phase AC output connection having first and second output terminals to provide alternating current or single-phase AC electrical output power reception; a DC circuit comprising first and second DC terminals and an energy storage component; a switching network comprises a total of six switching devices, only a so-called switching device blocking voltage in one direction, allowing bidirectional current flow, a so-called switching network is connected to a so-called AC input and output connections and a so-called DC circuit; and a control system connected to the switching network to control the switching device AC input power from the input connection to output AC electrical power converter connected to the output, or the output from the input AC power to output AC converter connected to the power input connections.
20、 如权利要求19所述的变流器,其特征在于,所述开关网络包含两个桥臂电路,每一个桥臂电路中共有三个开关器件,每一个桥臂电路连接到对应的交流输入端子和对应的交流输出端子,控制系统为开关网络提供了两套开关控制信号,每一套提供给对应的桥臂电路之一, 控制系统控制每一套开关控制信号处于三种状态之一,包括第一个状态连接对应的输入和输出端子到第一各直流端子,第二个状态连接输入和输出端子到第二个直流端子,和第三个状态连接输入端子到第一个直流端子,输出端子到第二个直流端子。 20, converter as claimed in claim 19, characterized in that the switching network comprises two arm circuits, each arm circuit has three switching devices, each arm circuit is connected to a corresponding AC input AC output terminal and a corresponding terminal of the control system provides two sets of switching control signal of the switching network, each set provided to a corresponding one of the arm circuits, each set of control system controls the switching control signal is in one of three states, comprising a first connection state corresponding to a first input and output terminals of each DC terminal, a second input and output terminals connected state to the second DC terminals, and a third state to the first input terminals connected to DC terminals, an output terminal to the second DC terminals.
21、 如权利要求19所述的变流器,其特征在于,所述控制系统为开关网络提供了脉冲宽度调制开关控制信号,用正弦波脉冲宽度调制或空间矢量调制方法控制开关器件。 21, converter as claimed in claim 19, characterized in that said control system provides pulse width modulation switching control signal of the switching network, controlling the switching device with a sinusoidal pulse width modulation or space vector modulation method.
22、 如权利要求19所述的变流器,其特征在于,所述控制系统提供了开关控制信号将来自于输入连接的输入交流电功率转换到在输出连接的输出交流电功率,或将来自于输出连接的输入交流电功率转换到在输入连接的输出交流电功率。 22, converter as claimed in claim 19, characterized in that the control system provides the switching control signal from the input AC power input connected to the output of the converter connected to the AC power output or output from the AC input power converter connected to an output AC power input connections.
CN 200710063178 2007-01-30 2007-01-30 AC-to-AC converter CN101237191A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102577068A (en) * 2009-08-20 2012-07-11 美国能量变换公司 3-phase high power UPS
CN106961225A (en) * 2017-03-21 2017-07-18 江苏固德威电源科技股份有限公司 discontinuous space vector pulse width modulation method and inverter

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102577068A (en) * 2009-08-20 2012-07-11 美国能量变换公司 3-phase high power UPS
CN106961225A (en) * 2017-03-21 2017-07-18 江苏固德威电源科技股份有限公司 discontinuous space vector pulse width modulation method and inverter
CN106961225B (en) * 2017-03-21 2019-06-11 江苏固德威电源科技股份有限公司 Discontinuous space vector pulse width modulation method and inverter

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