Metodu għal Kejl Swiċċjar Enerġija Provvista ma ' Diġitali Oxxilloskopju
Minn tradizzjonali analog power supplies to efficient switching power supplies, the types and sizes of power supplies vvisti vary greatly. They all face complex and dynamic work environments. The equipment load and demand may undergo significant changes in an instant. Even a "daily" switching power supply must be able to withfor instantaneous peaks that far sover its average operating level. Inġiniera li disinn enerġija provvisti jew sistemi biex użu enerġija provvisti ħtieġa biex tifhem il - xogħol kundizzjonijiet ta ' l- enerġija provvista taħt statiku u l-agħar każ kundizzjonijiet.
In il passat, describing the behavioral characteristics of power sources meant using a digital multimeter to measure static current and voltage, and performing arduous calculations using a calculator or PC. Today, most engineers turn to oscilloscopes as tagħhom preferut power measurement platform. Modern oscilloscopes can be equipped with integrated power measurement and analysis software, simplifying setup and making dynamic measurement aktar faċli. Utenti can customize key parameters, awtomatikament calculate, and see results within seconds, rather than just raw data.
Idealment, kull wieħed 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. Moreover, constantly changing performance and cost requirements also make power supply design more complex. Consider these issues:
For those accustomed to using an oscilloscope for high-bandwidth measurements, power measurement may be simple because its frequency is relatively low. In fact, there are also many challenges that high-speed circuit designers never have to face in power measurement.
The voltage of the entire 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 necessary to capture and analyze the waveform truthfully and detect any anormalities in the the waveform. The requirements for oscilloscopes are demanding. Multiple probes - fl-istess ħin requiring single ended probes, differenzjali probes, and current probes. L-istrument għandu ikollu a kbir memorja biex jipprovdi reġistrazzjoni spazju għal fit-tul frekwenza baxxa akkwist riżultati. U it jista ' jeħtieġ qbid differenti sinjali bi sinifikanti amplitudni differenzi fi wieħed akkwist.
Fundamentali ta ' Swiċċjar Enerġija Provvista
Il mainstream DC enerġija provvista arkitettura fi l-aktar moderni sistemi huwa a swiċċjar enerġija provvista (SMPS) , li huwa magħruf sew għal its abbiltà biex b'mod effettiv cope bi bidla tagħbijiet. Il elettriku sinjal mogħdija ta ' a tipiku swiċċjar qawwa provvista jinkludi passiv komponenti, attivi komponenti , u manjetiċi komponenti. Switching power supplies should minimize the use of lossy components such as resistors and linear transistors, and mainly use (idealment) lossless components such as switching transistors, capacitors, and magnetic components.
The switching power supply device also has a control part, li jinkludi komponenti bħala pulse wisa' modulation regulator, pulse frequency modulation regulator, and feedback loop 1. The control section may have its own power supply. Figure 1 is a simplified schematic diagram of a switching power supply, li shows the power conversion part, including 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.
