Physitech Power Systems Private Limited manufactures wide range of Control Systems Lab equipment.

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Liner systems simulator

Compensation design

P.I.D. controller

Characteristics of AC servo motor

SynchoTransmitter Receiver pair

Magnetic Amplifier

Programmable Logic Controller

Transfer Function of Motor

Transfer Function of Generator

Temperature Controller using PID

Simulation of Transfer Function using Op. Amp.

Linear Systems Simulator

There are three built-in sources in the unit with the following nominal specifications. Actual values may vary somewhat from unit to unit without causing any limitations to the scope of the experiment. Square Wave Frequency 40-90 Hz.(variable) p-p amplitude 0-2Volt(variable) Triangular Wave Frequency 40-90 Hz.(variable) p-p amplitude 0-2Volt(variable) Trigger Frequency 40-90 Hz.(variable) p-p amplitude ±5Volt(approx.)

Compensation Design

The unit has been designed with the objective of exposing the students to the problem of control system compensation. A simulated system of unknown dynamics1 is available which may be studied both in the time and frequency domains. In addition, the forward gain is variable, thus the system dynamics is adjustable in a wide range as well. The closed-loop system presents an 'unsatisfactory' performance. A set of performance specifications is to be prescribed by teacher, and the student would design a suitable compensator. Necessary theoretical background and design steps are explained in section 3, covering the s-plane and co-plane designs of both lag ana lead networks. Compensation network so designed may be easily implemented in the unit. a--,d its effect on the performance may be evaluated all necessary facilities are built-in in the system. Only a measuring CRO and a few passive components are needed for conducting the experiment.

PID Controller

This is a very well designed and compact unit for classroom experiments on the study of proportional-integral-derivative controllers. The schematic diagram of the unit comprises of flexible process, a PID controller, signal sources, a DVM and a stabilized power source for all the sub-systems. A simulate combination of the three basic modes proportional, integral, and derivative (PID) can improve all aspects of the system performance. The proportional controller stabilizes the gain but produces a steady state error. The integral controller reduces or eliminates the steady state error. The derivative controller reduces the rate of change of error.

Chracteristics of AC Servo Motor

Synchro Transmitter Receiver Pair

A Synchro is an electromagnetic transducer commonly used to convert an angular position of a shaft into an electric signal. Synchro Transmitter Receiver pair with suitable connections is supplied. Transmission of Position information from place to place electrically is demonstrated. Single phase AC supply is provided to the rotors of the transmitter receiver pair.

Magnetic Amplifier 

The Kit provided facilities testing of the magnetic amplifier in three modes i.e series connection, Parallel connection and self biased mode. The control is provided to vary the DC current and observe the AC current in all the three modes and draw the characteristic curves. Several experiments can be performed by the students using the Magnetic Amplifier. These include the following experiments: Series Connected Megamp Parallel connected Megamp Self excited

Programmable Logic Controller

Transfer Function of Motor

• A DC motor is provided with speed measurement and accurate measurement of time • Thyristor controller for speed control of DC motor in open loop. • Time taken for fall in speed from one given value to another given value under various conditions • Transfer function is calculated from the above data • Control is performed using relay logic. • 0.5HP,1500RPM, 220V DC shunt Motor with loading arrangement

Transfer Function of Generator

• A motor generator set is provided. • A thyristor controller is provided to control the DC motor speed in open loop. • A volt meter is provided to measure the generated voltage • An Ammeter is provided to measure field current. • 0.5HP,1500 RPM, 220V DC Shunt Motor coupled to DC generator

Temperature Control using PID

Temperature control is one of the most commonly used control systems in Industrial operation. This system is designed for the students to teach them P, PI, PID and ON-OFF control actions in the friendly environment of laboratory free from disturbances & uncertainties of plant prevalent in an actual process. The plant to be controlled is a specially designed oven having a short heating as well as cooling time. A solid state temperature sensor is used to convert the absolute temperature information to a proportional electrical signal. The reference and actual temperature arc indicated in degree Celsius on a switch selectable digital display. The controller unit compares the reference and the measured signals to generate the error controller option available to the user consist of ON-OFF or relay with two Hysteresis setting and combination of P, I, D, and integral block having independent coefficient settings

Simulation of Transfer Function using Op.Amp.