### AC to DC Converters

**Lesson 9 Single Phase Uncontrolled Rectifier**, objectives: Classify the rectifiers based on their number of phases and the type of devices used., Define and calculate the characteristic parameters of the voltage and current waveforms., Analyze the operation of single phase uncontrolled half wave and full wave rectifiers supplying resistive, inductive, capacitive and back emf type loads., Calculate the characteristic parameters of the input/output voltage/current waveforms associated with single phase uncontrolled rectifiers.. **contents**: [ Terminologies, Single phase uncontrolled half wave rectifier, Single phase uncontrolled full wave rectifier, Split supply single phase uncontrolled full wave rectifier., Single phase uncontrolled full bridge rectifier ]

**Lesson 10 Single Phase Fully Controlled Rectifier**, objectives: Differentiate between the constructional and operation features of uncontrolled and controlled converters, Draw the waveforms and calculate their average and RMS values of different variables associated with a single phase fully controlled half wave converter., Explain the operating principle of a single phase fully controlled bridge converter., Identify the mode of operation of the converter (continuous or discontinuous) for a given load parameters and firing angle., Analyze the converter operation in both continuous and discontinuous conduction mode and there by find out the average and RMS values of input/output, voltage/currents., Explain the operation of the converter in the inverter mode.. **contents**: [ Single phase fully controlled halfwave rectifier, Single phase fully controlled bridge converter, Operation in the continuous conduction mode, Operation in the discontinuous conduction mode, Inverter Mode of operation ]

**Lesson 11 Single Phase Half Controlled Bridge Converter**, objectives: Draw different topologies of single phase half controlled converter., Identify the design implications of each topology., Construct the conduction table and thereby draw the waveforms of different system variables in the continuous conduction mode of operation of the converter., Analyze the operation of the converter in the continuous conduction mode to find out the average and RMS values of different system variables., Find out an analytical condition for continuous conduction relating the load parameters with the firing angle., Analyze the operation of the converter in the discontinuous conduction mode of operation.. **contents**: [ Operating principle of a single phase half controlled bridge converter, Single phase half controlled converter in the continuous conduction mode, Single phase half controlled converter in the discontinuous conduction mode. ]

**Lesson 12 Single Phase Uncontrolled Rectifier**, objectives: Draw the conduction table and waveforms of a three phase half wave uncontrolled converter supplying resistive and resistive inductive loads., Calculate the average and RMS values of the input / output current and voltage waveforms of a three phase uncontrolled half wave converter., Analyze the operation of a three phase full wave uncontrolled converter to find out the input / output current and voltage waveforms along with their RMS and Average values., Find out the harmonic components in the input / output voltage and current waveforms of a three phase uncontrolled full wave converter., Analyze the operation of a three phase full wave uncontrolled converter supplying a Capacitive - Resistive load.. **contents**: [ Operating principle of three phase half wave uncontrolled rectifier, Three phase full wave uncontrolled converter, Operation of a 3 phase full wave uncontrolled bridge rectifier supplying an R - L - E load, Operation of a three phase uncontrolled bridge rectifier supplying a capacitive load ]

**Lesson 13 Operation and Analysis of the Three Phase Fully Controlled Bridge Converter**, objectives: Draw the circuit diagram and waveforms associated with a three phase fully controlled bridge converter., Find out the average, RMS valves and the harmonic spectrum of the output voltage / current waveforms of the converter., Find out the closed form expression of the output current and hence the condition for continuous conduction., Find out the displacement factor, distortion factor and the power factor of the input current as well as its harmonic spectrum., Analyze the operation of higher pulse number converters and dual converter., Design the triggering circuit of the three phase fully controlled bridge converter.. **contents**: [ Operating principle of 3 phase fully controlled bridge converter, Analysis of the converter in the rectifier mode, Analysis of the converter in the inverting mode., Higher pulse number converters and dual converter, Gate Drive circuit for three phase fully controlled converter ]

**Lesson 14 Operation and Analysis of Three Phase Half Controlled Converter**, objectives: Draw the circuit diagram and waveforms of different variables associated with a three phase half controlled converter., Identify the constructional and operational difference between a three phase fully controlled and half controlled converter., Calculate the average and RMS value of the output dc voltage., Calculate the displacement factor, distortion factor and power factor of the input ac line current., Calculate the Fourier series components of the output voltage and input current waveforms., Derive the closed form expression for output dc current and hence identify continuous or discontinuous conduction mode of the converter.. **contents**: [ Operating principle of three phase half controlled converter, Analysis of three phase half controlled converters ]

**Lesson 15 Effect of Source Inductance on the Performance of AC to DC Converters**, objectives: Draw the voltage and current waveforms associated with a converter taking into account the effect of source inductance., Find the average output voltage of the converter as a function of the firing angle and overlap angle., Estimate overlap angles under a given operating condition and hence determine the turn off time available for the thyristors., Draw the dc equivalent circuit of a converter and parameterize it., Find out the voltage stress on the thyristors due to commutation overlap.. **contents**: [ Single phase fully controlled converter with source inductance, Three phase fully controlled converter with source inductance ]

**Lesson 16 Power Factor Improvement, Harmonic Reduction, Filter**, objectives: Schemes for the improvement of power factor in AC-DC converters., Methods for harmonic reduction in the current waveforms of the converters., Types of filters used to obtain ripple free (dc) output voltage and currents, reducing the harmonics.. **contents**: [ Power Factor Improvement, Extinction Angle Control, Symmetrical Angle Control, Pulse Width Modulation (PWM) Control, Sinusoidal Pulse Width Modulation (SPWM) Control, Low Pass (L-C) Filter, Two Stage Filter, Harmonic Reduction, Active Shaping of Input (line) Current ]

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