A good example is shown in Figure 2.įigure 2: An example of how aliasing happens.
If the sampling rate is slow and the frequency of the signal is high, the ADC will not be able to reconstruct the original analog signal which will cause the system to read incorrect data. Aliasing means that when a digital image/signal is reconstructed, it differs greatly from the original image/signal caused from sampling. It is important to know the sampling rate of the ADC because you will need to know if it will cause aliasing. “What happens when the sampling rate is considerably slower?” you might ask. This is because the frequency of the original signal is a slow 1 Hz, meaning the frequency rate was still good enough to reconstruct a similar signal. The sample rate is very slow, but the signal still came out similar to the original analog signal. T = Period of the sample or the time it takes before sampling againįor example, in Figure 1, it seems f s is 20 S/s (or 20 Hz), while T is 50 ms. One important equation on the sample rate is: The more samples the ADC takes, the higher frequencies it can handle. This simply means how many samples or data points it takes within a second. The sampling rate is measured by using “samples per second”, where the units are in SPS or S/s (or if you’re using sampling frequency, it would be in Hz). The ADC’s sampling rate, also known as sampling frequency, can be tied to the ADC’s speed. Two important aspects of the ADC are its sampling rate and resolution.
They first sample the signal, then quantify it to determine the resolution of the signal, and finally set binary values and send it to the system to read the digital signal. This is because microcontrollers can only see “levels” of the voltage, which depends on the resolution of the ADC and the system voltage.ĪDCs follow a sequence when converting analog signals to digital. Microcontrollers can’t read values unless it’s digital data. (Source: Waqas Akram – Quantization in ADCs) The easiest way to explain this it through a visual! Figure 1 shows a great example of what analog and digital signals look like.įigure 1: A continuous signal (analog) turning into a digital signal.
Ac to converter series#
Digital signals are represented by a sequence of discrete values where the signal is broken down into sequences that depend on the time series or sampling rate (more on this later). These types of signals can come from sound, light, temperature and motion.
Ac to converter how to#
This paper is about the basic guide of how to select a VFD.Īt present, there are two main types of car inverters are pure sine wave inverter and quasi-sine wave inverter on the market for sale, there are lots of things we need to pay attention when we use a car inverter.In the real world, analog signals are signals that have a continuous sequence with continuous values (there are some cases where it can be finite). Variable frequency drive (VFD), also called frequency inverter, variable speed drive (VSD), adjustable frequency drive (AFD). Variable Frequency Drive (VFD) Selection Guide
You can easy set up a converter by following this guide. GoHz frequency converter is a great solution for converting 50Hz to 60Hz among different countries, also can convert 60Hz to 50Hz power supplies. Before you buying a frequency converter, it's better to understand what kinds of loads the frequency converter will be connected with. Static (solid state) means no moving parts inside the frequency converter, the definition is relative to rotary frequency converter which using an induction motor to achieve variable frequency.įrequency converter can help you change 60Hz to 50Hz, also can boost 110V to 220V by inner step up transformer, vice versa. What is a static (solid state) frequency converter? GoHz supplies low voltage single phase VFD ( 1/2 hp to 5 hp) and three phase VFD (1 hp to 500 hp) with low price. is an energy saving device special for AC motor speed controls by changing fixed frequency (50 Hz / 60 Hz) to variable frequency to adjust the motor speed according to the loads demand. Variable Frequency Drive (VFD), also named as frequency inverter, AC drive, variable speed drive, adjustable frequency drive etc. GoHz supplies both single phase and three phase static (solid state) frequency converters, built-in step up transformer, power capacity from 500 VA to 600 kVA. Frequency Converter, also named as AC power source, is a electronic device to convert fixed frequency (50 hertz, 60 hertz), fixed voltage (110V, 120V, 208V, 220V, 230V, 240V, 380V, 400V, 440V, 480V etc) to variable frequency (50Hz/60Hz or 400 Hz adjustable) and variable voltage (adjustable) with pure sine wave output to compatible with international power system.
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