Power elecronics lab manual1
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The document is a lab manual for a power electronics course. It describes an experiment on a single-phase half-wave SCR rectifier circuit. The objective is to calculate the average output voltage, RMS output voltage, form factor, ripple factor, and rectification efficiency for different firing angles. The required apparatus includes components like an auto transformer, SCR module, triggering unit, meters, load, and oscilloscope. The procedure involves wiring the circuit as shown, varying the firing angle, and taking measurements to calculate the specified performance parameters.
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1) The document describes using a PIC18F microcontroller to control a brushless DC motor in open-loop and closed-loop modes.
2) In open-loop control, the motor is commutated based on Hall sensor inputs using input capture and PWM outputs. PWM duty cycle is varied to control motor speed.
3) In closed-loop control, motor speed is measured using input capture and Hall sensors, and PWM duty cycle is adjusted based on the difference between a reference speed and the measured speed to regulate motor speed.
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Power elecronics lab manual1
- 1. SASTRA UNIVERSITY (SHANMUGHA ARTS, SCIENCE, TECHNOLOGY & RESEARCH ACADEMY) DEPARTMENT OF ELECTRICAL AND ELECTRONICS ENGINEERING UEEE 605 POWER ELECTRONICS LABORATORY LAB MANUAL FOR VI SEMESTER PART TIME B. Tech. EEE
- 3. 1. SINGLE-PHASE HALF-WAVE PHASE CONTROLLED RECTIFIER AIM To study the single phase half wave SCR circuit and to calculate the following for a given firing angle. a) Average Output Voltage b) RMS Output Voltage c) Form Factor d) Ripple Factor e) Rectification Efficiency APPARATUS REQUIRED Sl. No. Description Type Range Quantity 1 Auto Transformer 1-φ 1 2 SCR Module 1 3 SCR Triggering Unit 1-φ 1 4 Ammeter PMMC 1 5 Voltmeter PMMC 1 6 Voltmeter MI 1 7 Lamp Load 1 8 CRO 1 9 Probes & Wires As Required 10 Current Shunt 1 PROCEDURE 1. Wire up the connections as in the circuit diagram. 2. Keep the potentiometer in the trigger control module to the maximum position corresponding to 180 degrees.
- 4. OBSERVATIONS Rectification efficiency Y-axis X-axis Vdc(V) Vrms(V) Supply Firing Form Ripple Angle(α) Voltage Idc(A) Factor Factor (V) No of Amp/ No of Time/ Measured Calculated Measured Calculated Div Div Div Div V I V I V I V I V I