Industrial electronics
Cheat sheet
DC choppers on one card
DC choppers on one card: can you fill each line first?
Quick check · tap an answer to continue
Lesson notes
Key points
- D = Ton ÷ T: Duty cycle is switch on-time divided by the total switching period.
- Buck: Vo = D·Vs: Use the buck chopper when output must be lower than the supply.
- Boost: Vs ÷ (1−D): Use the boost chopper when output must be higher than the supply.
- Buck-boost: −D÷(1−D): Buck-boost gives a higher or lower output with reversed polarity.
- TRC vs CLC: Time ratio control varies duty cycle; current limit control holds current within limits.
Takeaway: Buck lowers, boost raises, duty cycle controls both.
Quick check: A buck chopper with 200 V supply runs at duty cycle 0.4. Output?
- 500 V
- 120 V
- 80 V
Vo = D × Vs = 0.4 × 200 = 80 V.
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