What are the advantages and disadvantages of the five commonly used filters in rectifier circuits?

The advantages and disadvantages of 5 commonly used filters in rectifier circuits

1. Capacitor filtering

The advantage of capacitor filtering is that the output voltage is high, and the filtering effect is good when the current is small. The disadvantage is that the load capacity is poor, the charging current is large when the power is turned on, and the rectifier tube is subjected to a large surge current.

Capacitor filtering is suitable for circuits with small currents.

2. Inductance filtering

The advantage of inductive filtering is that it has better load carrying capacity, good filtering effect for frequently changing loads, and does not impact the rectifier tube. The disadvantage is that the output voltage is low, and the choke core must be large when the load current is large. The back electromotive force generated by the inductance may break down the components.

Inductance filtering is suitable for occasions with large load changes and large currents.

3. Γ (Gamma) filter

The advantages of Γ (gamma) filter are larger output current, better load capacity, and better filtering effect. The disadvantage is that the choke is bulky and costly.

This kind of filtering is suitable for circuit filtering with large load changes and large load currents.

4. π (Pie) type LC filter

The advantage of Π (Pie) LC filter is high output voltage and good filtering effect. The disadvantage is that the output current is small and the load capacity is poor.

This filter is suitable for occasions where the load current is small and stability is required.

5. π (Pie) type: RC filter

The advantage of the π-type RC filter circuit is that it has a good filtering effect and is relatively economical. The filtering can also reduce voltage and current limit. The disadvantage is that the load capacity is poor and the output current is small.

This filter circuit is suitable for occasions with small load currents.

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