Method of charging a frequency converter using a regulated power supply - News - Global IC Trade Starts Here.

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When selecting an adjustable power supply for a frequency converter, it's important to match the input voltage requirements. For single-phase or three-phase 230V AC input, a single-phase 230V AC power regulator with 2A output is typically sufficient. This type of regulator can also be used to charge both single-phase and three-phase inverters by connecting L+ to L1 and N to either L2 or L3. Since the rectifier circuits are similar, all DC bus capacitors will charge at the same time. However, when dealing with higher voltage inverters, such as those requiring 400V, it’s crucial to use a power supply that can provide the necessary voltage level. Although the capacitor requires very little current during the charging process, a low-capacity power supply (like 2A) is usually enough. This makes it possible to safely and efficiently charge the system without overloading the power source. Always ensure the power supply is compatible with the inverter’s specifications to avoid damage or performance issues.