Hi friends, In this article, I am going to describe you strain gauge working principle, gauge factor and strain gauge load cell working. A strain gauge is a passive transducer, that converts mechanical displacement into the change of resistance. A strain gauge sensor is a thin wafer-like device that can be attached to a variety of materials […]
Hi friends, In this article, I am going to discuss the thermocouple working principle, its types and properties. Thermocouples are the temperature sensors which are extensively used for the measurement of the temperature variations. They sense the temperature and the temperature is further measured by other instruments after sensing it. As they convert a non-electrical quantity (temperature) into
In this article, I am going to discuss the NTC thermistor working principle, its characteristics, and its applications. So let us start. A thermistor is a special type of resistor whose resistance changes with the change in its body temperature. These are of two types: PTC Thermistor: Positive Temperature Coefficient (PTC) thermistor, is made up
Controlled slowing or stopping of a motor and its driven load is as important as starting in many applications like cranes and electric traction. Sometimes electric braking is better than other breaking systems due to its greater economy and absence of brake wear. Therefore, electric braking of dc motors has its own importance, keeping
Hi friends, in this article, I am going to discuss about the lux meter working principle and its application. We have to measure light in many tasks. For this, the Lux meter should be used. To measure the light accurately, a lux meter is a very suitable device. It is calibrated to read directly in lux. The
The errors in transducers occur because they do not follow, the input-output relationship given by qo = f(qi) The error can be expressed in terms of either input or the output quantity. Four types of errors which occur usually are as under: Errors in Transducers 1. Scale Error The scale error comprises of four different types
There are many ways to measurement of a physical quantity. While the selection of transducers, and how to select a transducer for a particular application, the following points should be kept in the mind. Unfortunately, most transducers are not sensitive to just one quantity. If measurements are to be made under conditions where there is a likelihood of two or
Hi friends, In this article, I am going to discuss the thermocouple instrument working principle, its types and applications. So let us start with our topic. When two metals of different work functions are placed together, a voltage is generated at the junction. This generated voltage is proportional to the temperature and this junction is known as
Hi friends, In this article, I am providing you some basic information about Brushless DC motor i.e. BLDC motor. With the help of this information you can easily understand the BLDC motor working principle and operation. The torque-speed characteristics and the flexibility of the dc motor have made it a very attractive choice for applications
The most common schemes employed for the protection of a three-phase generator stator windings from earth faults phase-to-phase faults make use of circulating current principle. In these protection schemes, currents at the two ends of the protected section are compared. Under normal conditions, these currents are equal became different on the occurrence of a fault in
Differential Protection of Generator & Alternator Read More »