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The exhaustive list of topics in Pulse width Modulation For Power Electronic Converters in which we provide Help with Homework Assignment and Help with Project is as follows:

  • Power electronic converters for dc-ac and ac-dc power conversion:
    • Electronic switches
    • DC-dc buck and boost converters
    • H-bridge
    • Multilevel converters – diode clamp
    • Flying capacitor and cascaded-cell converters
    • Voltage source and current source converters
    • Evolution of topologies for dc-ac power conversion from dc-dc converters.
  • Applications of voltage source converters:
    • Applications of voltage source converter
    • Motor drives
    • Active front-end converters
    • Reactive compensators
    • Active power filters.
  • Purpose of pulsewidth modulation:
    • Review of Fourier series
    • Fundamental and harmonic voltages
    • Machine model for harmonic voltages
    • Undesirable effects of harmonic voltages – line current distortion
    • Increased losses
    • Pulsating torque in motor drives
    • Control of fundamental voltage
    • Mitigation of harmonics and their adverse effects
  • Pulsewidth modulation (PWM) at low switching frequency:
    • Square wave operation of voltage source inverter
    • PWM with a few switching angles per quarter cycle
    • Equal voltage contours
    • Selective harmonic elimination
    • THD optimized PWM
    • Off-line PWM
  • Triangle-comparison based PWM:
    • Average pole voltages
    • Sinusoidal modulation
    • Third harmonic injection
    • Continuous PWM
    • Bus-clamping or discontinuous PWM
  • Space vector based PWM:
    • Space vector concept and transformation
    • Per-phase methods from a space vector perspective
    • Space vector based modulation
    • Conventional space vector PWM
    • Bus-clamping PWM
    • Advanced PWM
    • Triangle-comparison approach versus space vector approach to PWM
  • Analysis of line current ripple:
    • Synchronously revolving reference frame
    • Error between reference voltage and applied voltage
    • Integral of voltage error
    • Evaluation of line current ripple
    • Hybrid PWM for reduced line current ripple
  • Analysis of dc link current:
    • Relation between line-side currents and dc link current
    • DC link current and inverter state
    • Rms dc current ripple over a carrier cycle
    • Rms current rating of dc capacitors
  • Analysis of torque ripple:
    • Evaluation of harmonic torques and rms torque ripple
    • Hybrid PWM for reduced torque ripple
  • Inverter loss:
    • Simplifying assumptions in evaluation of inverter loss
    • Dependence of inverter loss on line power factor
    • Influence of PWM techniques on switching loss
    • Design of PWM for low inverter loss.
  • Effect of inverter dead-time effect:
    • Requirement of dead-time
    • Effect of dead-time on line voltages
    • Dependence on power factor and modulation method
    • Compensation of dead-time effect.
  • Overmodulation:
    • Per-phase and space vector approaches to overmodulation
    • Average voltages in a synchronously revolvingd-q reference frame
    • Low-frequency harmonic distortion
  • PWM for multilevel inverter:
    • Extensions of sine-triangle PWM to multilevel inverters
    • Voltage space vectors
    • Space vector based PWM
    • Analysis of line current ripple and torque ripple
  • Overview of power electronic converters:
    • Electronic switches.
    • DC - DC converters.
    • DC - AC voltage source inverter.
    • DC - AC voltage source inverter.
    • Multilevel inverter - diode clamped inverter.
    • Multilevel inverter - flying capacitor inverter.
  • Applications of voltage source converter:
    • Applications of voltage source converter
  • Purpose of pulsewidth modulation (PWM):
    • Review of Fourier series.
    • Harmonic voltages and their undesirable effects.
  • Pulsewidth modulation at low switching frequency:
    • Low switching frequency operation of a VSI
    • Selective harmonic elimination and THD optimized PWM.
  • Triangle-comparison based PWM:
    • Sine-triangle modulation.
    • Third harmonic injection PWM (THIPWM).
    • Bus-clamping PWM.
  • Space vector-based PWM:
    • Concept of space vector.
    • Conventional space vector PWM and bus-clamping PWM.
    • A unified perspective of triangle-comparison and space vector based PWM.
    • Advanced bus-clamping PWM.
  • Analysis of line current ripple:
    • Transformation from stationary reference frame to synchronously revolving dq reference frame.
    • Volt-second balance and instantaneous error voltage.
    • Calculation of RMS line current ripple.
    • Space vector-based hybrid PWM for reduced line current ripple.
  • Analysis of dc link current:
    • Inverter state and dc link current.
    • Average and RMS values of dc link current.
  • Analysis of torque ripple:
    • Calculation of harmonic torques and RMS torque ripple.
    • Hybrid PWM techniques to reduce ripple torque.
  • Inverter loss:
    • Evaluation of conduction loss.
    • Dependence of switching loss on power factor and modulation method.
    • PWM techniques for reduced switching loss.
  • Effect of inverter dead-time:
    • Effect of dead-time with continuous modulation.
    • Effect of dead-time with discontinuous or bus-clamping PWM.
  • Overmodulation:
    • Per-phase approach to overmodulation.
    • Space vector approach to overmodulation.
    • A perspective from the synchronously revolving d-q reference frame.
  • PWM for multilevel inverters:
    • Extension of sine-triangle modulation to three-level inverters.
    • Extension of conventional space vector modulation to three-level inverters.
    • Analysis of line current ripple and torque ripple.