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Voltage Control of Single-Phase Inverters

Voltage Control of Single-Phase Inverters. Commonly-used Techniques Single-Pulse-Width-Modulation Multiple-Pulse-Width-Modulation Sinusoidal-Pulse-Width-Modulation Modified-Sinusoidal-Pulse-Width-Modulation Phase-Displacement Control. Single-Pulse-Width-Modulation.

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Voltage Control of Single-Phase Inverters

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  1. Voltage Control of Single-Phase Inverters • Commonly-used Techniques • Single-Pulse-Width-Modulation • Multiple-Pulse-Width-Modulation • Sinusoidal-Pulse-Width-Modulation • Modified-Sinusoidal-Pulse-Width-Modulation • Phase-Displacement Control ECE 442 Power Electronics

  2. Single-Pulse-Width-Modulation ECE 442 Power Electronics

  3. One Pulse per Half-Cycle Pulse Width Controls the Output Voltage ECE 442 Power Electronics

  4. Carrier and Reference Signals Gate Pulse Gate Pulse • Compare the Reference Signal with the Carrier • Frequency of the Reference Signal determines the frequency of the Output Voltage • Modulation Index = M = Ar/Ac ECE 442 Power Electronics

  5. Gate Signals and Output ECE 442 Power Electronics

  6. rms value of the Output Voltage ECE 442 Power Electronics

  7. Fourier Series for the Output Voltage ECE 442 Power Electronics

  8. Times and angles of the intersections Pulse width d (or pulse angle δ) TS = T/2 ECE 442 Power Electronics

  9. Harmonic Profile ECE 442 Power Electronics

  10. Multiple-Pulse-Width-Modulation ECE 442 Power Electronics

  11. Multiple Pulses per Half-Cycle of Output Voltage ECE 442 Power Electronics

  12. Gate Signal Generation • Compare the Reference Signal with the Carrier • Frequency of the Reference Signal determines the Output Voltage Frequency • Frequency of the Carrier determines the number of pulses per half-cycle • Modulation Index controls the Output Voltage ECE 442 Power Electronics

  13. Gate Signals and Output Voltage Number of pulses per half cycle = p = fc/2fo = mf /2 where mf = frequency modulation ratio ECE 442 Power Electronics

  14. rms Value of the Output Voltage ECE 442 Power Electronics

  15. Fourier Series of the Output Voltage ECE 442 Power Electronics

  16. The times and angles of the intersections The pulse width d (or pulse angle δ) TS = T/2p ECE 442 Power Electronics

  17. Harmonic Profile ECE 442 Power Electronics

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