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AC + DC电源/放大器

可编程AC + DC电源3kVA〜67kVA（DC + 0.01Hz〜1kHz）

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为大功率应用定制波形生成

在电子产品的研究，开发和测试过程中，产生功率波形的需求通常不属于传统市电供应的范围。波形需要范围从纯正弦波120V 60Hz甚至谐波失真与特定的谐波使THD的贡献。在这些情况下，N4A系列可编程交流电源提供了灵活，坚固和高性能的发电解决方案。 N4L提供市场上 价值的可编程电源，实现正弦波形生成和的谐波合成精度，市场*的保真度性能<0.3％THD。

为广泛的应用提供全面的灵活性，包括白色家电测试，电机驱动开发，符合IEC61000的EMC测试，航空航天，汽车，空间探索，机器人等等。

以及纯正弦波形。如果您需要生成定制的高功率波形，N4L想要满足您的要求。

像汽车，航空航天和可再生能源这样的行业已经接受了N4A，因为他们提供价格合理，高度可靠，坚固耐用，高性能的AC + DC电力传输。

什么是AC（+ DC）可编程电源？

AC（+ DC）可编程电源可以概括为具有附加功能以及任意波形发生，电压和频率调制功能以及排序功能的变频器。任意波形发生器实质上连接到高保真功率放大器，能够提供高达67kVA（取决于型号）。

AC（+ DC）电源如何工作

N4A AC（+ DC）电源 将交流输入市电信号（通常为50 / 60Hz和100〜250Vrms）转换为直流信号，直流母线的输出连接到一个专有的逆变器，该逆变器利用PWM开关技术以及精心设计的输出滤波网络来提供高度稳定的低失真输出波形。因此，如果需要正弦输出，失真（％THD）通常低于0.1％。逆变器由高度可配置的任意波形发生器驱动，能够产生复杂的波形房屋开发测试程序。

高功率任意波形生成

我们所有的信号源均采用由N4L开发的专有双通道任意波形发生器技术。该技术利用双通道直接数字合成来召唤两个DDS发生器。因此，为用户提供同步，多次谐波生成以及频率扫描和长排序功能。

使用两个DDS发生器可提供主功率器件和调制信号的 分辨率。

这种测量技术允许在不降低每个频谱分量的分辨率的情况下生成长的自定义波形序列。与基本功率信号相比，这是特别有利的。传统的单个DAQ任意发生器在产生低水平的谐波以及大的基础时会遭受较差的分辨率。作为这项技术的结果，N4A的精度远远超过IEC61000-4-13（谐波和谐波间谐波敏感度测试）及其竞争对手的要求。

交流可编程电源四分之一视图
N4A交流电源具有10位垂直分辨率和16,384点的 波形分辨率，可生成单个周期性波形。还有一个用于导入自定义波形的内部存储功能。

N4A系列AC + DC电源可提​​供从6kVA到30kVA以上的各种输出额定值。以及IEC61000电磁兼容性标准测试，提供低THD和优异的可靠性。

N4A AC + DC电源 - 高功率，低失真，1kHz全信号带宽

模型

输出功率

带宽

输出THD％

输出阶段

 输出电流（连续）

 输出电流（3秒涌入）

N4A03 3kVA的
1kHz满信号，

15kHz的小信号

<0.3％1期10

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AC+DC Power Sources/Amplifiers

Programmable AC+DC Power Sources 3kVA ~ 67kVA (DC+0.01Hz ~ 1kHz)

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Customized Waveform Generation for High Power Applications

During research, development and testing of electronic products, the need to generate supply waveforms to power a product often fall outside the scope of the traditional mains supply. The wave forms required range from pure sinusoids at 120V 60Hz or even harmonically distorted with a specific harmonic making the THD contribution. In these cases, the N4A range of programmable AC power sources offer a flexible, rugged and high performance power generation solution. N4L provide best value programmable power sources on the market, achieving market leading fidelity performance  of <0.3% THD for sinusoidal wave form generation and unrivaled harmonic synthesis accuracy.

Offering complete flexibility for a wide range of applications including white goods testing, motor drive development, EMC testing to IEC61000, aerospace, automotive, space exploration, robotics and much more.

Our power sources feature the ability to generate complex as well as pure sinusoidal wave forms. If you need to generate customized high power wave forms, N4L will have a solution to meet your requirements.

Industries such as automotive, aerospace, and renewable energy have embraced the N4A due to the fact they offer affordable, highly reliable, rugged, high performance AC+DC power delivery.

What is an AC(+DC) Programmable Power Source?

An AC(+DC) Programmable Power Source can be summarized as a frequency converter with added functionality such as arbitrary waveform generation, voltage and frequency modulation capabilities and sequencing functionality. The arbitrary waveform generator is essentially connected to a high fidelity power amplifier able to deliver up to 67kVA (depending upon model).

How an AC(+DC) Power Source works

The N4A AC(+DC) power sources initially convert the AC input mains signal (Usually at 50/60Hz and between 100~250Vrms) into a DC signal, this is performed by a three phase or single phase input rectifier which charges a DC bus. The output of the DC bus is connected to a proprietary inverter which utilizes PWM switching techniques along with a carefully designed output filter network to provide a highly stable low distortion output waveform. Thus, if a sinusoidal output is required the distortion (% THD) is typically below 0.1%. The inverter is driven by a highly configurable arbitrary waveform generator, which is able to create complex wave forms that can feature a range of harmonics, interharmonics, surges, sags, swells and frequency variations required for both international standards compliance testing as well as customized in house development test procedures.

High Power Arbitrary Waveform Generation

All of our sources feature proprietary dual channel arbitrary waveform generator technology developed by N4L. This technology utilizes dual channel direct digital synthesis a summing amplifier circuitry to combine the two DDS generators. Thus, providing the user with simultaneous, multiple harmonic generation as well as frequency sweeping and long sequencing capabilities.

The use of two DDS generators provides optimized resolution of both the main power component and the modulation signal, whereby the modulation signal can be a harmonic or inter-harmonic of the fundamental, for example.

This metrology permits long custom waveform sequences to be produced without a reduction in the resolution of each spectral component. This is especially beneficial when the harmonic is very small in comparison to the fundamental power signal. Traditional single DAQ arbitrary generators suffer from poor resolution when generating low level harmonics alongside large fundamentals. As a result of this technology, the accuracy of the N4A far exceeds the requirements of IEC61000-4-13 (harmonic and inter-harmonic susceptibility testing) and its competitors.

The N4A AC Source also features 10-bit vertical resolution and a maximum waveform resolution of 16,384 points to produce a single periodic waveform. There is also an internal storage function for imported custom wave forms featuring user intuitive library menus that display the waveform graphically on the user interface.

The N4A range of AC+DC Power Sources are available with a variety of output power ratings from 6kVA up to and above 30kVA. They are the perfect solution for general power source applications as well as IEC61000 electromagnetic compatibility standards testing, offering low THD and excellent reliability.

For more information please see the AC+DC Programmable Power Source product page

LPA Series Laboratory Power Amplifiers: Wide bandwidth precision voltage and current amplifiers

The LPA range of Laboratory Power Amplifiers from N4L provide AC and DC coupled wide band amplification for a wide variety of industrial and laboratory applications. All LPA amplifiers exhibit a 1MHz bandwidth and range from 400Vpk, 50mA models to 18Vpk, 5Arms models.Designed originally for use with N4L Phase Sensitive Multimeters, they can also be used anywhere where there is a need to boost a signal in either voltage or current at frequencies up to 1MHz.

They combine DC accuracy with wide bandwidth to faithfully reproduce complex wave forms, driving loads that may be resistive or reactive.Applications for which the LPA amplifiers can be used within are wide ranging, from Piezo transducer testing to materials analysis of dielectrics where high voltage DC offsets are required.

The LPA can be coupled with an N4L PSM Frequency Response Analyzer and external current shunt to provide a flexible impedance measurement system able to drive DUT’s at higher voltages and currents normally possible using traditional LCR measurement methods.

Reasons to choose an N4L Laboratory Power Amplifier

Products in this series

• Programmable AC Power Sources 3kVA ~ 67kVA (DC+0.01Hz ~ 1kHz)

  The N4A Programmable AC Power Sources are available from 3kVA ~ 67kVA, the ideal solution as part of IEC61000 compliant EMC test systems or general power source applications.

   View Product Details

• LPA05 Laboratory Power Amplifier

  LPA05: LPA05A & LPA05B provide wide bandwidth signal amplification at up to 8A peak

   View Product Details

• LPA400 Laboratory Power Amplifier

  LPA400: The LPA400 is a wideband high volatge amplifier ideal for a range of applications

   View Product Details

• LPA01 Laboratory Power Amplifier

  LPA01: The LPA01 is a wide bandwidth DC accurate amplifier

   View Product Details