UcD Tanaka Bridge LTspice simulation

steph_tsf

Member
2008-03-27 12:21 pm
Hello, I had great fun transforming the Sansui-Tanaka Full Balanced Bridge into a Class D UcD amp. Can somebody check the waveforms ?
 

Attachments

  • Sansui AUX701 - Tanaka Full Balanced Bridge.jpg
    Sansui AUX701 - Tanaka Full Balanced Bridge.jpg
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  • UcD Tanaka Bridge (schema).JPG
    UcD Tanaka Bridge (schema).JPG
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  • UcD Tanaka Bridge (simulation result).jpg
    UcD Tanaka Bridge (simulation result).jpg
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  • UcD Tanaka Bridge (insufficient dead time issue).JPG
    UcD Tanaka Bridge (insufficient dead time issue).JPG
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  • UcD Tanaka Bridge.zip
    638.5 KB · Views: 65

steph_tsf

Member
2008-03-27 12:21 pm
As suggested by Tekko in the "UcD Philips UM10155 LTspice simulation" thread, I played with the value of R9 (R109 and R209 here) for controlling the deadtime.

Here are the results:

R109 and R 209 (ohm)...Spikes.............................THD at 5kHz (%)
340............................Twice the AVG current........0.048
360............................Same as the AVG current.....0.042
380............................Acceptable......................0.092
400............................Barely noticeable...............0.092
420............................Past barely noticeable........0.152

See attached pictures and .zip

Thanks Tekko!
 

Attachments

  • UcD Tanaka Bridge (5kHz .tran 0 405µ 205µ 100n) R109 R209 420.GIF
    UcD Tanaka Bridge (5kHz .tran 0 405µ 205µ 100n) R109 R209 420.GIF
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  • UcD Tanaka Bridge (5kHz .tran 0 405µ 205µ 100n) R109 R209 400.GIF
    UcD Tanaka Bridge (5kHz .tran 0 405µ 205µ 100n) R109 R209 400.GIF
    88.6 KB · Views: 50
  • UcD Tanaka Bridge (5kHz .tran 0 405µ 205µ 100n) R109 R209 380.GIF
    UcD Tanaka Bridge (5kHz .tran 0 405µ 205µ 100n) R109 R209 380.GIF
    89.1 KB · Views: 53
  • UcD Tanaka Bridge (5kHz .tran 0 405µ 205µ 100n) R109 R209 360.GIF
    UcD Tanaka Bridge (5kHz .tran 0 405µ 205µ 100n) R109 R209 360.GIF
    91.6 KB · Views: 73
  • UcD Tanaka Bridge (5kHz .tran 0 405µ 205µ 100n) R109 R209 340.GIF
    UcD Tanaka Bridge (5kHz .tran 0 405µ 205µ 100n) R109 R209 340.GIF
    89.4 KB · Views: 194
  • UcD Tanaka Bridge.zip
    20.8 KB · Views: 50