Метод для Измерение Переключение Питание Питание Питание С Цифровой Осциллограф
От традиционный аналоговый питание источники к эффективный коммутационный питание источники, the types and sizes of power units vary greatly. They all face complex and dynamic work environments. The equipment load and demand may undergo значительный changes in an instant. Even a "daily" переключение питание снабжение должен быть способный к выдержать мгновенный пики that far exeed its average working level. Инженеры кто дизайн питание источники или системы к использование питание поставки потребность к понимание эксплуатация условия из питание снабжение под статический и наихудший условия.
В the past, описание the behavioral характеристики of power sources maant using a digital multimeter to measure static current and voltage, and performing artrious calculations using a calculator or PC. Today, most engineers turn to oscilloscopes as their preferred power measurement platform. Modern oscilloscopes can be equipped with integrated power measurement and analysis software, simplifying setup and making dynamic measurement measurement проще. Пользователи может настраивать ключ параметры, автоматически вычислить, и видеть результаты в течение секунд, скорее чем просто raw данные.
Мощность Питание Дизайн Проблемы и Измерение Требования
В идеале, each power supply should work like the mathematical model designed for it. But in the real world, components are flawed, loads can change, power supply may be distorted, and environmental changes can alter performance. Plus, constantly changely performance and cost requirements also make power supply design more complex. Consider these issues:
How many watts of power can the power supply maintain beyond its rated power? How long can it last? How much heat does the power supply emit? What happens when it overwarms? How much cooling airflow does it require? What happens when the load current increases significantly? Can the device maintain its rated output voltage? How does the power supply respond to a complete circuit at the the выход конец? Что происходит когда в вход напряжение из питание питание питание изменения?
Designers need to develop power supplies that take up less space, reduce heat, reduce manufacturing costs, and meet stricter EMI/EMC standards. Only a strict measurement system can enable engineers to achieve these goals.
Для тех привыкших к использования ан осциллографа для высокой пропускной способности измерений, мощность измерение можете быть простой потому что его частота есть относительно низкий. В факт, там есть также многие проблемы это высокоскоростной схема дизайнеры никогда иметь к лицу в мощность измерение.
The voltage of the enwhole switchgear may be high and floating, meaning it is not grounded. The pulse width, period, frequency, and duty cycle of the signal will all vary. It is need to capture and analyze the waveform truthfully and detect any abnormalities in the waveform. the requirements for oscilloscopes are demanding. Multiple probes - while requiring single end probes, differential probes, and current probes. The instrument must have a large memory to provide recording space for long-long low-frequency acquisition results. And it may require captureing different signals with significant amplitude differences in one acquisition.
Основы Из Коммутация Питание Источник питания
The mainstream DC power supply architecture in most modern systems is a switching power supply (SMPS), which is well-known for its ability to effect cope with change loads. The electrical signal path of a типичный переключение питание питание включает пассивный компоненты, active components, and magnetic components. Коммутация питание источники питания должен минимизировать использование потери компоненты такие как резисторы и линейные транзисторы , и в основном использование (в идеале) без потерь компоненты такие как переключение транзисторы% 2c конденсаторы , и магнитные компоненты.
The switching power supply device also has a control part, which includes components such as pulse width modulation regulator, pulse frequency modulation regulator, and feedback loop 1. The control section may have its power supply. Figure 1 is a simplified schematic diagram of a switching power supply, which shows the power conversion part, include active devices, passive devices, and magnetic components.
Switching power supply technology uses power semiconductor switching devices such as metal oxide field-effect transistors (MOSFETs) and insulated gate bipolar transistors (IGBTs). These devices have a short switching time and can withstand unstable voltage spikes. Equally important, they consume very little energy in both open and closed states, with high efficiency and low heat generation. Switching devices largely determine the overall performance of switching power supplies. The main measurements of switching devices include: switching loss, average power loss, safe working area, and others.
