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Laboratories

Lab-1

DC Machine Lab

The Electrical Machines Laboratory is the one of the important Laboratory of Electrical Engineering Department. The Laboratory is equipped with conventional and modern Electrical and Electronics measuring equipments, various AC and DC Electrical Machines and Transformers. This Laboratory caters the need of Under Graduate Students to enable them to easily understand the basics and adapt to advanced experiments like modelling of Electrical Machines and special Electrical Machines. Also, the Laboratory is used for research activities in machines using MAGNET Software and to carry out project works in the design of Electrical Machines.

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Lab-2

AC Machine Lab

Small DC motors are used in tools, toys, and appliances. The universal motor can operate on direct current but is a lightweight brushed motor used for portable power tools and appliances. Larger DC motors are currently used in propulsion of electric vehicles, elevator and hoists, and in drives for steel rolling mills. The laboratory consists of a set of generator and DC motors and is fed from a main control panel with a continuous voltage of 220 V for the generator and DC motors and a single phase alternating voltage of 220 V and a 50 Hz frequency with three-phase service feed with 380 volts The frequency is 50 Hz. Experiments on generators, engines and single phase transformers are given to students in the electrical engineering department and to all branches (electrical engineering branch, electronic engineering branch and communications engineering branch) according to the officially established curriculum.

Lab-3

Control Systems Lab

The Control Systems Lab in the Department of Engineering Technology contains a variety of laboratory equipment used in design and experimentation of digital and analog electromechanical feedback control systems. The equipment in this lab is mainly used in lab projects of Process Control and Interface Design (ENT 311) and Electromechanical Control Systems (ENT 418) courses.

he topics studied in this lab include principles of digital and analog data acquisition, electro-mechanical interfacing, control systems with embedded microcontrollers and programmable logic controllers, digital communication and networking, feedback control systems, state variable models, higher order system response, transient response, and stability analysis.

If now a small direct current is passed through the control winding, a steady amount of flux will be added to the above varying flux. And the total flux in the upper core varies along with flat portion of the magnetization curve during the entire half cycle; the core is almost completely saturated. Such a small change of flux causes no little inductance in the steel core that nearly all the supply voltage appears across the load and the load current approaches its largest value. At the same time the lower core which is in parallel with the upper core is not saturated during this same half cycle. By increasing the DC control signal further one can force each core to be saturated during both half cycles. Since both cores are now saturated at all time, the load current becomes maximum. Thus, as the DC control current is increased from a low value, the core will saturate earlier in the half cycle thus delivering more current to the load.

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Lab-4

Power Electronics Lab

The drive towards more electrification has resulted in the need for more electric power. Apart from power generation, power processing plays a key role in efficient utilization of the available power. It is important that the raw power is converted to a form that is usable in different applications. Power electronics plays a pivotal role in providing power based on the desired specifications. The basic application which shows the significance of power electronics in our day-to-day life is the fan regulator. Before the advent of solid-state fan regulators, bulky and lossy resistive fan regulators were used. To control the fan speed, the AC mains voltage is passed through a resistor that is connected in series with the fan. So, when the fan is on, there is constant power dissipation in the series resistor. Research has come up with more innovative ways of controlling the fans or motors, in general, by controlling voltage and frequency. This is possible with the availability of power semiconductor devices.

Electric power is scarce, and it is of prime importance to deliver the power to the loads with minimum losses. Advancements in power semiconductor research have resulted in more efficient chemistries such as silicon carbide and gallium nitride. The benefits of power electronics are:

  1. 1. High power density power supplies
  2. 2. Improved efficiency of up to 99% in power conversion
  3. 3. Noise-sensitive applications such as in medical devices are also transitioning to switching power supplies because of the efficiency and reliability
  4. 4. Power can be made available in the desired form and level as per specifications
  5. 5. Increased clean power generation using power electronic interfaces to connect the sources to grid
  6. 6. Wireless power transfer
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