Presentation is loading. Please wait.

Presentation is loading. Please wait.

NEWMAR 115 – 12 – 20AU Full-Wave Rectifier with Choke-Input Filter.

Similar presentations


Presentation on theme: "NEWMAR 115 – 12 – 20AU Full-Wave Rectifier with Choke-Input Filter."— Presentation transcript:

1 NEWMAR 115 – 12 – 20AU Full-Wave Rectifier with Choke-Input Filter

2 Choke-Input Filter

3 DC Operation V dc + - V ’ dc + - V’ dc = V dc (R inductor ) / (R inductor + R load )

4 AC Operation (approximate) Normally, make X capacitor << R load

5 Approximate the Circuit VrVr V’ r V’ [rms] = (X capacitor / X inductor )(V r[rms] ) Usually, X inductor >> X capacitor

6 Full-Wave Rectifier Output Output frequency = twice the line frequency Second Harmonic (first ac component)

7 2π(120)

8 “Critical” Inductance, L c Must keep the load current flowing for the complete cycle of the input voltage The dc load current must be > the peak value of the ac component of the load current

9 Minimum Inductance L c

10 “Bleeder” Resistor The bleeder resistor provides 2 functions –keeps a minimum current flowing through the inductor –discharges the filter capacitor after turn-off R bleeder = R 1 = the largest value of R load –sets the maximum value of inductor L

11 Range of values for the Filter Choke NEWMAR 115 – 12 – 20AU Power Supply L max > R 1 /1000 = 5/1000 = 5mH  50mH L c >= R 1 /1000 = (12 V/20 A)/1000 = 0.6mH


Download ppt "NEWMAR 115 – 12 – 20AU Full-Wave Rectifier with Choke-Input Filter."

Similar presentations


Ads by Google