_____ Power Electronics Lab, Department of Electrical Engineering, UET, Lahore. 2mm Patch cords. Characteristics of a Triac. Fig. Thyristors, Static V-I Characteristics of SCR, TRIAC, GTO & IGBT, Turn-On & Turn-OFF Mechanism of SCR, Gate Turnoff Thyristor (GTO) .Power BJTs . No 1. Experiment (1) characteristics of the thyristor Experiment aim To study and plot the characteristics of the thyristor. Aim: To study the V-I characteristics of TRIAC. The characteristics curve is shown in the below Diagram. The triac also … 2. The structure of IGBT is very much similar to that of PMOSFET, except one layer known as injection layer which is p + unlike n + substrate in PMOSFET. Output Power Characteristics Phase control is the most common form of Thyristor power control. With switch SW1 open, no current flows into the Gate of the triac and the lamp is therefore “OFF”. RC Triggering Circuit – HWR & FWR 19 6. NV6532 TRIAC Characteristic Trainer 2. Protection, cooling and mounting techniques. MOSFET Characteristics 15 4. Plot the transconductance of this JFET. The circuit symbol and schematic construction of one such device are shown in fig.1. The two junctions are labeled J 1 and J 2.Figure below show the structure of n-channel IGBT. Power MOSFETs - Insulated Gate Bipolar Transistors (IGBTs) - Basic Structure and VI Characteristics. APPARATUS REQUIRED: Trainer kit, Patch cards, Multimeters. Experiment No: 2 Experiment Name: Study of V- I Characteristics of TRIAC. Experiment No Page. 2. The operation can be summarized as follows-First Quadrant Operation of Triac. We will discuss the operation of this circuit in the description of experiment circuit section. 6.3.2 illustrates the main characteristics of the triac. Power Electronics. Conduct an experiment to control the illumination of incandescent lamp using TRIAC, DIAC combination. THEORY: - TRIAC is one of the bidirectional devices of thyristor family. Fig.2 shows the characteristics of TRIAC. ; V GT is a range of gate voltages that will trigger conduction. VI CHARACTERISTICS OF IGBT 20 5. 1 Object Load test on DC Shunt motor. It consists of three terminals with a vast range of bipolar current carrying capacity.The designers of the IGBT think that it is a voltage controlled bipolar device with … To obtain V-I characteristics and to find on-state forward resistance of given SCR. In fig.1, OABC is the forward characteristics of SCR at I G =0. 1 Thyristors DC Characteristics PREPARED BY: J.B. G. Ibarra 1.0 OBJECTIVES 1.1 To become familiar with the characteristics of the (SCR) silicon controlled rectifier and its operation. Experiment 5 Registration No. ☞Switch on Kit observe whether meter are reading 0. This injection layer is the key to the superior characteristics of IGBT. Experiment 4 : TRIAC Characteristic Theory. Before switch on the power, get circuit connection approval from the staff in charge.DOING EXPERIMENT: Start the experiment in the presence of an instructor / staff in-charge and do the same by proper procedure. Show your calculations for voltage with firing angle in reading 3 Show your calculations for voltage with firing angle in reading 7 Sketch the variation of output voltage with firing angle. Fig. 10.Conduct an experiment to produce variable DC o/p voltage (chopper), plot o/p voltage v/s duty cycle for Variable frequency & Fixed Frequency. The triac characteristics is similar to SCR but it is applicable to both positive and negative triac voltages. Apparatus Required: 1. The anode and cathode are connected to main source through the 4.2 (a). IGBT Characteristics 17 5. cathode, the curve between V and I is called the forward characteristics. Experiment no. 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