What is AC and DC?
Jun 17, 2024
| Alternating current (AC) and direct current (DC) are always reminiscent of physics and are frequently used in our lives AC and DC can be converted and usually processed by a converter, which we refer to as an inverter, and the electricity used in our daily lives is alternating current (AC), so we seldom use direct current directly. Direct current and alternating current DC and AC are two forms of electricity and both play a vital role in various applications. Direct Current A constant unidirectional flow of charge, from negative to positive, with a constant voltage over time, used in low-voltage applications and electronic devices, battery-powered systems and electronic control circuits. The current flow is steady and is often used in batteries, electronic circuits, and certain types of motors. These devices mentioned require a constant and stable voltage. Alternating current Periodic reversal of charge flow, voltage and current change direction periodically (sinusoidal waveform), suitable for long distance transmission and distribution. This oscillating current is the standard form used in residential, commercial and industrial applications. Commonly used in household appliances, industrial machinery and power grids. Difference 1.Voltage conversion Direct current direction will not change over time, more stable. Alternating current and voltage are not stable, the size and direction will change periodically. DC voltage is large and small. The positive and negative poles of the alternating current voltage change repeatedly, just now the positive pole, and instantly become negative. Alternating current can be transformed by a transformer, while direct current requires the use of specific equipment (step-up or step-down converter) for voltage regulation. 2.energy loss DC power transmission fault loss is smaller than AC power. AC power transmission line capacitive current exists. AC power in the long distance transmission process energy loss compared to DC power is smaller. 3.Different transmission direction DC voltage direction is unchanged. AC voltage direction is constantly changing. 4.Power supply DC power usually comes from batteries, solar panels, etc.; AC power is delivered by power plants through transmission lines. Inverter An inverter is an electronic device used to convert direct current (DC) to alternating current (AC). This conversion process involves several key stages and components that work together to convert the incoming DC power to the desired AC output. DC is converted to high frequency AC, the output voltage is controlled by Pulse Width Modulation (PWM), in order to obtain a clean and smooth sinusoidal output waveform, the high frequency components are removed and the output waveform is shaped to a near pure sine wave Filtering and Output Stage is implemented using a Filter Stage, and lastly, a voltage regulator circuit is utilized to ensure that the output voltage is stabilized and stays within the desired range. As in the RV application scenario, the complete battery system layout, using to lithium iron phosphate battery/battery packs (e.g. SANFOU 12.8V100Ah, 12.8V200Ah, 12.8V300Ah, 12.8V100Ah UpGrade can be used in RVs, according to the needs to choose), solar panels, MPPT controllers, chargers, inverter Distribution panel, etc. The inverter is used here to convert the DC power from the batteries to AC power, and is installed near the batteries, and the output of the inverter is connected to the AC control panel to supply AC power to the appliances that use AC power. Conclusion: The use of AC and DC should be based on specific equipment parameters to determine the need for AC to DC or vice versa, should choose the appropriate inverter for the conversion of the two. Activity As June comes to an end, Amazon Prime Day (7.16-7.17) is gearing up with discounts and deals that you can't miss if you're looking for LiFePO4 Battery! |
