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Working principle of Capacitor Step-down(II)

Views: 3     Author: Site Editor     Publish Time: 2018-03-30      Origin: Site

Capacitor voltage reduction is actually using capacitive reactance to limit current. The capacitor actually acts as a limiting current and dynamically distributing the voltage at both ends of the load. .

The following points should be paid attention to when using capacitor to reduce voltage:

1.Choose the appropriate capacitor according to the current size of the load and the operating frequency of the alternating current, not according to the voltage and power of the load. .

2.Current-limiting capacitors must be non-polar capacitors, absolutely not electrolytic capacitors. And the capacitor withstand voltages should be above 400V. The ideal capacitor is the iron shell oil immersion capacitor .

3.Capacitor step-down cannot be used in high-power conditions because it is unsafe. .

4. Capacitive voltage reduction is not suitable for dynamic load condition. .

5.Similarly, capacitive step-down is not suitable for capacitive and inductive loads. .

6.When the DC operation is needed, the half-wave rectifier is adopted as far as possible. Bridge rectification is not recommended, But it is better to meet the condition of the constant load bar.



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