Introducción a ondulación armónicos y ruido generado por conmutación potencia fuente
Ondulación
noise
Noise: For the nominal noise in electronic circuits, it can be summarized as a collective term for all signals other than the destination signal. At first, people referred to the electronic signals that caused the noise emitted by sound equipment such as radios as noise. However, the consequences of some non purposeful electronic signals on electronic circuits are not always related to sound, so later people gradually expanded the concept of noise. For example, the electronic signals that cause white spots and stripes on the visual screen are also referred to as noise. It may be said that all signals in a circuit, except for the intended signal, regardless of whether they affect the circuit or not, can be referred to as noise. For example, ripples or self-excited oscillations in the power supply voltage can have adverse effects on the circuit, causing the audio device to emit alternating sound or causing circuit malfunction, but sometimes may not result in the aforementioned consequences. For this type of ripple or oscillation, it should be referred to as a type of noise in the circuit. There is a radio wave signal of a certain frequency, which is a normal target signal for a receiver that needs to receive this signal, while for another receiver it is a non target signal, which is noise. The term interference is often used in electronics and sometimes confused with the concept of noise. In fact, there is a difference. Noise is an electronic signal, while interference refers to a certain effect, which is an adverse reaction caused by noise on a circuit. There is noise in the circuit, but there may not always be interference. In digital circuits. It is often observed with an oscilloscope that there are small spikes mixed with normal pulse signals, which are not expected, but rather a form of noise. However, due to the characteristics of the circuit, these small spikes are not yet likely to cause confusion in the logic of the digital circuit, so it can be considered that there is no interference.
Cuando un ruido voltaje es grande suficiente para causar interferencia a el circuito 2c el ruido voltaje es llamado interferencia voltaje. El máximo ruido voltaje aplicado a un circuito o dispositivo cuando puede mantener normal operación es llamado el antiinterferencia tolerancia o inmunidad de circuito o dispositivo. Generalmente hablando, ruido ruido es difícil eliminar, pero esfuerzos puede ser hecho a reducir la intensidad de ruido o mejorar circuito inmunidad para prevenir ruido de formar interferencia.
armónico
Armónico: refers a the electrical quantity contained in the current with a frequency that is an integer multiple of the fundamental wave. It generally refers to the Fourier series decomposition of periodic non sinusoidal electrical quantities, and the electrical quantity generated by other currents greater than the fundamental wave frequency. In a broad sense, since the effective component of the AC power grid is a single frequency of the power frequency, any component that is different from the power frequency can be called a harmonic.
The reason for harmonic generation: Due to the sinusoidal voltage being applied to a nlinear load, when the current flows through the load, it does not have a linear relationship with the applied voltage, and the fundamental current undersomees distortion, forming a non sinusoidal current, that is, harmonics are generated in the circuit. the main nlinear loads include UPS, switching power supply, rectifier, frequency convertidor, inversor, etc.
