意大利SIRIO脉冲变压器丨电流互感器丨电感器产品介绍

SIRIO变压器TI系列介绍

用途

脉冲变压器用于高频功率转换器中，当需要根据与每个不同应用领域相关的安全标准，将电脉冲从控制装置传输到功率级时，保持电路之间的电流隔离。

电信号被施加到初级侧，然后传递到次级侧，以发射功率BJT，功率MOSFET，IGBT，SCR，GTO，TRIAC。

特征

在高频功率转换系统中，有多种控制技术可用，它们因不同的设备参数而不同，例如额定功率，额定电压和电流，应用领域。

开发人员为自己的应用选择了点火拓扑之后，他就有机会通过考虑其主要参数来找到最合适的脉冲变压器。

脉冲变压器的主要特点如下：

• n 初级匝数比

• Vt 可以通过单极性脉冲在次级侧传输的最小电压*时间区域（称为传输区域），不会引起磁芯饱和，参考温度为25°C

• LP 初级绕组电感

• Ck 绕组之间的耦合能力

• Ls 初级漏感，它是在次级绕组短路时在初级侧测得的电感值

• RP 初级绕组电阻

• RS 次级绕组电阻

• tr 上升时间，是在次级侧连接额定负载电阻时传输脉冲所需的时间；该值与漏感值紧密相关

• Imax 最大次级电流，上升时间等于tr（连接到次级绕组的额定负载电阻）

• Ip 额定一次有效电流（热电流）

• fn 额定工作频率（或最佳频率范围）

• Uis 两个绕组之间的最大工作电压

• Up 两个绕组之间的隔离电压

Sirio脉冲变压器按尺寸和生产概况分类，并按系列分组。有一些标准脉冲和驱动变压器，它们按家族列出。它们可以用于许多应用程序，但是由于解决方案的可能性非常大，因此有时有必要开发定制产品（请参见“定制设计”表）。通过查看标准代码表，可以轻松了解每个脉冲/驱动变压器尺寸的一般特征。

Purpose

Pulse transformers are used in high frequency power converters, when it is required to trasfer an electrical pulse from the control to the power stage, keeping the galvanic isolation between the circuits, according to the safety standards related to each different application fields.

The electrical signal is applied to the primary side and transferred to the secondary side, to fire power BJTs, power MOSFETs, IGBTs, SCRs, GTOs, TRIACs.

Features

In high frequency power conversion systems, several control techniques are available and they differ from each other because of the striking apparatus parameters, like rated power, rated voltages and currents, field of application.

After the developer has chosen the firing topology for his application, he has the chance to find the most suitable pulse transformer, by considering its main parameters.

Main features of a pulse transformer are the following ones:

• n primary to secondary turns ratio

• Vt minimum voltage*time area (called transfer area) that can be trasferred at the secondary side with unipolar pulse, without causing the core saturation, referred to the temperature of 25°C

• LP primary winding inductance

• Ck coupling capacity between windings

• Ls primary leakage inductance, it is the inductance value measured at the primary side, with the secondary winding short-circuited

• RP primary winding resistance

• RS secondary winding resistance

• tr rise time, it is the time that takes to trasfer the pulse when the rated load resistance is connected at the secondary side; this value is tightly connected to the leakage inductance value

• Imax maximum secondary current, available with a rise time equal to tr (rated load resistance connected to the secondary winding)

• Ip rated primary effective current (thermal current)

• fn rated working frequency (or optimum frequency range)

• Uis maximum working voltage between two windings

• Up isolation voltage between two windings

Sirio pulse transformers are classified by dimensions and production profiles and grouped in Families. Some Standard Pulse and Drive Transformers are available, they are listed on a family by family basis. They can be used for many applications but, as the solution possibilities are so many, it is sometimes necessary to develop a custom product (see the Custom Design sheet). By looking through the standard codes table it is easy to understand the general features of each pulse/drive transformer size.

SIRIO变压器TC系列介绍

用途

这些变压器是高频功率转换器的基本组成部分。像标准的50 Hz变压器一样，它们根据不同应用领域相关的安全标准，通过改变电压和电流水平并保持负载与电网的电气隔离，将电能从一次侧传递到二次侧。通常，市电电压由全波二极管桥和电容器整流，直流链路通过控制在几十或几百kHz范围内的电子开关（或多个，取决于拓扑）为变压器供电 。

特征

根据应用，额定功率，工作电压，额定电流，环境条件，设计人员必须为功率转换器选择最佳拓扑结构。最常用的是功率高达1 kW的反激，前向，推挽式转换器，而对于更高的值，半桥或全桥转换器是更合适的拓扑结构。Sirio开发和生产尺寸不超过1 kW的小型开关模式变压器，以及功率不超过20 kW或更高的开关模式电源变压器。

工业应用通常需要有关电气数据，效率要求，安全标准，坚固性，机械尺寸等方面的特定功能，因此很少考虑使用标准电源或标准变压器。

多样化的现实使Sirio决定为开关变压器的开发做出巨大的努力，以便能够提供针对自动化生产进行优化的特殊组件：这种方法使得创造满足客户要求的产品成为可能。Sirio技术。

这种理念一直是Sirio的强项之一：以标准组件为代价提供高质量的定制产品。

• 通过选择标准原材料，例如铁氧体磁心和塑料零件（盒子和线轴），可以实现及时生产和规模经济。

• 由于对原材料的质量进行了持续不断的检查，因此可以实现非凡的生产效率。

• 高频组件在所有生产批次中都需要非常稳定的结构和统一的质量，这只能通过高水平的自动化才能获得：从卷绕到组装过程，从真空铸造到最终检查阶段。

• 多年来，一直在开发整个真空铸造工艺，并密切关注产品，以找到在绕组之间非常短的距离内达到很高的工作电压水平的方法。

• 通过100％的最终检查阶段和生产过程中的过程检查来保证并持续监督生产质量。

Purpose

These transformers are the basic part of high frequency power converters. Like standard 50 Hz transformers, they transfer the electrical power from the primary to the secondary side, by changing voltage and current levels and keeping the galvanic isolation of the load from the mains, according to the safety standards related to the different application fields. Usually the mains voltage is rectified by a full-wave diode bridge and a capacitor, the DC link feeds the transformer through an electronic switch (or more than one, depending on the topology) controlled in the range of some tens or some hundreds of kHz.

Features

Depending on the application, the rated power, the working voltage, the rated current, the environment conditions, the designer has to choose the best topology for the power converter. The most used ones are flyback, forward, push-pull converters for power levels up to 1 kW, while for higher values half-bridge or full-bridge converters are the more suitable topologies. Sirio develops and produces small size switch mode transformers, up to 1 kW, and switch mode power transformers, up to 20 kW and more.

Industrial applications typically requires specific features in terms of electrical data, efficiency requirements, safety standards, robustness, mechanical dimensions, and so on, so it is rarely possible to consider standard power supplies, or standard transformers.

That heterogeneous reality made Sirio decide to dedicate great efforts to the switching transformers development, in order to be able to supply special components, optimized for the automatic production: this kind of approach makes possible the creation of products satisfying the customer specification and enhanced by the Sirio technology.

That Philosophy has always been one of the Sirio's strong point: to offer a high quality customized product, at the cost of a standard component.

• Just-in-time production and economies of scale are achieved by the choice of standard raw materials, like ferrite cores and plastic parts (boxes and bobbins).

• Extraordinary productive efficiency is possible because of deep and continuous check of raw materials' quality.

• High frequency components need very stable construction and uniform quality over all the production batches, which can be obtained only with a high level of automation only: from the winding to the assembling process, from the vacuum casting to the final inspection phase.

• The whole vacuum casting process has been developed over the years with close attention to the products, to find the way to reach very high working voltage levels in very short distances between windings.

• The production quality is guaranteed and constantly supervised by the 100% final inspection phase and by process checks during production.

SIRIO变压器TA系列介绍

通过考虑最终应用和目的，可以使用几种电流互感器。 每种类型都有其特定的功能，但是它们都有相同的目标：将输入电流值转换成比例信号；将输入电流值转换成比例信号。测量的准确性取决于应用程序。

通常，电流将是变压器的初级电流，而次级绕组将连接到负载电阻，以便获得具有与测量电流相同信息的电压信号（参见附图）。

Sirio专门从事三种类型电流互感器的开发和生产。

• 市电电流互感器

• 用于测量的电流互感器

• 高频应用电流互感器

By considering the final application and the purpose, several current transformer kinds are available. Each type has its own specific features, but they all have the same goal: to convert, the input current value in a proportional signal; the accuracy of the measurement depends on the application.

Tipically, the current will be the primary current of the transformer, while the secondary winding will be connected to a burden resistance, in order to obtain a voltage signal with the same information of the measured current (see the drawing).

Sirio is specialized in the development and production of three types of current transformers.

• Mains Frequency Current Transformers

• Current Transformers for Measurement Purpose

• Current Transformers for High Frequency Applications

SIRIO变压器I系列介绍

用途

“电感器”是指各种各样的电感组件，具有各种各样的应用和目标，但它们都像“储能罐”一样工作。例如，通过考虑高频DC / DC转换器的输出滤波级，输出电感器与输出电容器连续交换电能。由于电感器功能要包含电流的变化，因此流经电感器的电流通常主要是直流电流，具有叠加的高频电流纹波（在开关频率或其两倍值处，具体取决于拓扑结构）。

类似地，通过考虑高频转换器的功率因数校正（PFC）阶段，存在涉及电感器和电容器的高频能量交换。在这种情况下，流经电感的电流主要由电源频率谐波和PFC级工作频率处的叠加电流纹波组成。非隔离式高频转换拓扑（降压，升压，降压-升压）中也使用了类似的电感器，其中电流波形根据导通模式而变化，也就是说，转换器工作在连续模式还是不连续模式。

特征

工业应用通常需要专用的电感器，因为每个电感器都需要定义明确的特性。因此，Sirio选择投入大量精力来进行量身定制的扼流圈开发，以自动生产为导向，而不是基于通常在我们的威士忌酒馆中可获得的标准原材料制作电感器目录。这种方法使得可以以与目录产品相同的成本及时生产定制组件。

电感器的主要特点如下

• Ln 额定电感值

• Rn 额定绕组电阻

• In 额定电流（输出电感器的平均值）

• Imax 最大电流（磁芯不必在该峰值电流值处饱和）

• Irms 均方根电流（热电流值）

• ΔI 峰值纹波电流

• fn 额定工作频率（纹波频率）

• Un 最大工作电压（绕组上的最大电压）

• Up 绕组与铁芯之间或绕组与外壳之间的隔离电压

Purpose

The term "inductor" refer to a wide category of inductive components, with a big variety of applications and goals, but they all act like “energy tanks”. For example, by considering the output filtering stage of a high frequency DC/DC converter, the output inductor continuously swaps the electrical energy with the output capacitor. As the inductor function is to contain the variation of current, the current through the inductor is normally mainly direct current with a superimposed high frequency current ripple (at the switching frequency, or its double value, depending on the topology).

Similarly, by considering the Power Factor Correction (PFC) stage of a high frequency converter, there is a high frequency energy swap involving the inductor and the capacitor; in that case, the current through the inductor is mainly composed by the mains frequency harmonic and a superimposed current ripple at the working frequency of the PFC stage. Similar inductors are also used in non-isolated high frequency conversion topologies (Buck, Boost, Buck-Boost), in which the current waveforms change depending on the mode of conduction, that is if the converter works in continuous or discontinuous mode.

Features

Industrial applications often require dedicated inductors, as every one needs well defined characteristics. For this reason, Sirio chose to dedicate great efforts to customized choke development, automatic production-oriented, instead of an inductors catalogue, based on standard raw materials, typically available at our wharehouse. This kind of approach makes possible a just in time production of a custom component with the same cost of a catalogue product.

Main features of inductors are the following ones.

• Ln rated inductance value

• Rn rated winding resistance

• In rated current (average value in case of output inductors)

• Imax maximum current (the core has not to saturate at that peak current value)

• Irms rms current (thermal current value)

• ΔI peak-to-peak ripple current

• fn rated working frequency (ripple frequency)

• Un maximum working voltage (maximum voltage across the winding)

• Up isolation voltage between winding and core or between winding and case