Till now, we discussed Capacitor, Thermal battery, Pneumatic Battery, Springs, Flywheels etc. In this post, we will discuss Molten Salt Battery and Ice Battery. Molten Salt Battery As the name suggests, it contains a high capacity thermal salt. This type of battery absorbs the solar thermal energy and dispense it during night for generation of […]
Ring Laser Gyro
The Ring laser gyro (RLG) functions in the following way : The laser generates a very coherent beam of light. This concludes that since the source is same, the generated photons are at one specific frequency. The beam is split into two beams that travel the same path but in opposite directions: one clockwise and […]
Conversion from free Gyro to Gyroscope
Till now we have learned about the free gyro. Now, We will learn how to restrict the free Gyro from drifting and tilting. To do so, We need to address certain issues which plays a significant role in converting a free Gyro to a Gyro Compass. They are : 1º of freedom has to be […]
Damped Oscillation
The process of producing damped oscillation of Gyro and its various phases are as follows: By adding an additional weight to the lower part of the Gyro sphere, We can provide it the pendulum effect. This is done by placing a damper (with two pots, one at each end of the damper) partially filled with […]
Strapdown System
Lightweight digital computers permit the system to eliminate the gimbals, creating strapdown system, and are called so because their sensors are simply strapped to the vehicle. In a strapdown inertial navigation system the accelerometers are rigidly mounted parallel to the body axes of the vehicle. In this type of system, the gyroscopes do not provide […]
Displacement type Accelerometer
Displacement type Accelerometer As in the case of normal navigation systems, The Inertial Navigation system is not dependent on the external fields or forces. In place of that, an Inertial Navigation system always keeps on tracking its location by precise measurement of the acceleration and its rotary motion it is sensing. The acceleration is measured […]
Neon Tester
A Neon Tester is one of the very popular test equipment of its time. Its basic function is to test if the circuit is live or not. It also measures the approx voltage-scale i.e. from a minimal limit of 110 volts to a maximum limit of 700 volts in both AC/DC supplies. In addition, it […]
Stroboscope
A Stroboscope is also known as strobe. A stroboscope is a test equipment which is utilised for making a cyclical rotating thing appearing to be slow moving or still. In other words, we can say that a Stroboscope is a monitoring and measuring device which uses stroboscopic effects for the observation of rapid periodic motions. […]
Frequency Counter
The Frequency counter is a test equipment which is utilised for measurement of the Signal-frequency produced by a Sine wave generating device or an oscillator. It is very simply configured and easy to use. We only need to provide the Signal frequency(to be measured) as an input to the Frequency-counter. It does the measurement of […]
Digital Multimeter
Digital Multimeter is an electronic test equipment which measures the AC/DC voltage and provides the reading in digital numeric mode. It has successfully replaced its age old counterpart , Analog multi-meter, which provides the reading with a pointing needle on a fixed scale. This test equipment may be used to measure the continuity of wire/circuit […]
Why Starter is used ??
You must have noticed that we use a starter to run motors. But have you ever thought why starter is used for running a motor?? Lets dig in to the cause. As we know, the current drawn by a motor armature is given by the relation: Ia=(V-Eb)/Ra In this equation, Eb […]
Three Point Starter
The internal wiring for Three point starter is shown in the fig below. The three terminals of the starter are marked A, F and L. One line is directly connected to point L which is further connected to the starting handle (arm) through the overload release. If motor has to be started, we need to […]
Four Point Starter
Four point starter is connected to a long-shunt compound motor. If we compare it to the generally used 3 point starter, we can easily mark one remarkable difference than its counterpart. In four point starter, the most critical ‘Hold ON coil’ (electromagnet) is placed out of the shunt field circuit. Rather to its place in […]
Series Motor Starter
A face plate/drum type controller is used for starting the series motor. This controller can also be used to control the speed of a series motor as well as to reverse the direction of its rotation. It is commonly known as Series motor starter. As the operator has to monitor the operation of motor continuously, […]
Direct online starter
The most simple and basic type of starter for motors (induction motor) is the Direct Online starter. The Direct on line starter contains an ON/OFF switch and an OLR. Here, OLR stands for overload relay for protection against excessive load current. The selection of switch depends upon the operator’s requirement. Generally, the switch which is […]
Auto Transformer Starter
An Auto transformer starter basically uses an auto-transformer to reduce the voltage applied to a motor during its start. As we know that the starting of big motors which are used for prolonged periods exert large current in the circuit. Due to this, a voltage drop occurs which may damage other electrical equipments which are […]
Star Delta Starter
Star Delta starter comes under the category of starters using reduced voltage method for starting the motor. Just like all other starters, the basic aim to use this starter is to decrease initial high starting current generated by the motor at the starting procedure. It is used for the purpose of limiting the voltage drop […]
RS 232 Signals
RS 232 stands for Recommended standard number 232. This interface is an age old, and yet it is being used for interconnecting DTE and DCE. It is also one of the maximum used standards for data exchange. The simplicity of configuration and huge capability has rendered this standard a very successful run in the interface […]
DB 9 Loopback
The RS232 connector was initially developed to use 25 pins. In this DB25 connector pin configuration, provisions were provided for a secondary serial RS232 communication channel. However, practically only one serial communication channel with handshaking is present. There were hardly a few computers manufactured in which provision for both RS232 channels were available. For example […]
Methods of Measurement
Measuring instruments may be defined as device for determining the value or magnitude of quantity or variable.To know about ‘Measuring instruments’ in detail, visit https://electricalfundablog.com/blog/measuring-instrument/665/. Here in this post, we will learn about the methods of measurement. The methods of measurement may be broadly classified into two categories. Direct Methods of measurement. In this method, […]