1 / 11

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

NEWMAR 115 – 12 – 20AU Full-Wave Rectifier with Choke-Input Filter. Choke-Input Filter. DC Operation. +. +. V dc. V ’ dc. -. -. V’ dc = V dc (R inductor ) / (R inductor + R load ). AC Operation (approximate). Normally, make X capacitor << R load. Approximate the Circuit. +.

kimo
Download Presentation

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

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. NEWMAR 115 – 12 – 20AUFull-Wave Rectifier with Choke-Input Filter ECE 442 Power Electronics

  2. Choke-Input Filter ECE 442 Power Electronics

  3. DC Operation + + Vdc V’dc - - V’dc = Vdc(Rinductor) / (Rinductor + Rload) ECE 442 Power Electronics

  4. AC Operation (approximate) Normally, make Xcapacitor << Rload ECE 442 Power Electronics

  5. Approximate the Circuit + + Vr V’r - - Usually, Xinductor >> Xcapacitor V’[rms] = (Xcapacitor / Xinductor)(Vr[rms]) ECE 442 Power Electronics

  6. Full-Wave Rectifier OutputOutput frequency = twice the line frequency Second Harmonic (first ac component) ECE 442 Power Electronics

  7. 2π(120) ECE 442 Power Electronics

  8. “Critical” Inductance, Lc 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 ECE 442 Power Electronics

  9. Minimum Inductance Lc ECE 442 Power Electronics

  10. “Bleeder” Resistor • The bleeder resistor provides 2 functions • keeps a minimum current flowing through the inductor • discharges the filter capacitor after turn-off • Rbleeder = R1 = the largest value of Rload • sets the maximum value of inductor L ECE 442 Power Electronics

  11. Range of values for the Filter Choke • NEWMAR 115 – 12 – 20AU Power Supply • Lmax > R1/1000 = 5/1000 = 5mH  50mH • Lc >= R1/1000 = (12 V/20 A)/1000 = 0.6mH ECE 442 Power Electronics

More Related