World Of Electrical

Characteristics Of DC Shunt Motor Characteristics Of DC Shunt Motor Circuit diagram of DC Shunt Motor is shown in below image. Circuit Diagram of DC shunt motor We know that torque is directly proportional to the flux per pole and armature current. So, Ta proportional to Φ and Ish According to circuit diagram Ia = IL - Ish Ish = V / Rsh  V = Eb + Ia Ra   There are three characteristic s of DC Shunt Motor, which is mentioned below. Torque - Armature current ( T / Ia ) characteristics Speed - Armature current ( N / Ia ) characteristics  Speed - Torque ( N / T ) characteristics    1. Torque - Armature current characteristics We know that field current is remains constant because of supply voltage is constant in dc shunt motor. Here , for dc shunt motor flux is also constant because supply voltage is kept constant So,  Ta α Ia So torque is directly proportional to the armature current and it'

What is the function of Electric Drives? And all the information of Electric drive is given below Definition A device which is used to motion control is called drive. An electrical machine which used for motion control is called electric drive. Block Diagram of Electrical Drives  1. Source Source are used in electrical drives  AC supply DC supply    2. Power modulator Power modulator perform two functions It take the electrical supply from the source and give it to the motor in suitable form of motor. Power modulator select the mode of operation of motor, such that motoring or braking mode. 3. Load It is the machinery or device which used to perform particular or given operation. 4. Motors There are several motors are used in electrical drives such that DC series motor, DC Shunt motor, DC compound motor, DC permanent magnet motor, Induction motors, Synchronous motors, stepper motor.   5. Sensing uni

Coulomb's  Law Coulomb's law statement " Like charges ripple each other and unlike charges attract each other. "                                     OR " The electrostatic force ( attraction or repulsion type ) between two charges is directly proportional to the product of magnitude of two charges and inversely proportional to the distance between two charges. " Mathematically, F  ∝ q1 q2 /  r^2 |F |= k q1 q2 / r^2 Where, k = coulomb's constant        q1,q2 = charges                r = distance between two charges

Kirchoff's Law Kirchoff's gave two most famous laws in electrical world which is given below. Kirchoff's current law Kirchoff's voltage law 1. Kirchoff's current law Statement " Kirchoff's current law state that the algebraic sum of all current meeting at a point or node in any electrical circuit is zero." Mathematically I1 + I2 - I3 + I4 - I5 = 0 Kirchoff's current law known as KCL 2. Kirchoff's voltage law Statement " Kirchoff's voltage law state that the algebraic sum of voltage across all elements in loop is zero. " Mathematically V12 + V23 + V34 + V41 = 0 Kirchoff's voltage law know as KCL.

How Galvanometer works?? What is Galvanometer? A galvanometer is a device which is used for detecting and indicating an electric current. It is a one type of electromechanical device. It is used for to indicate the direction of current flow in conductor. A galvanometer is type of Ammeter. Working Principle Torque acts on a current carrying coil drape in the uniform magnetic field so coil make be rotates. So detection of moving coil galvenogalva is directly proportional to the current flowing in the coil. Construction The construction of the moving iron galvanometer is shown in below image. Working Let take a coil PQRS which has L length and width 'b'. It's arrange in a such a way that the plane of coil stay parallel to the magnetic field. Here current through the coil is I. Here coil sides PQ and RS perpendicular to the magnetic field so it's experience the force by each side. F = B I L   These 

There are three types of DC motor: Shunt wound Series wound Compound wound   1.  Shunt wound Motor Circuit diagram of this type of motor shown in below image. In this type of dc motor, Field winding is connected in parallel with armature. When voltage across shunt field winding is same as supply voltage, it's resistance is very high. So shunt field winding has many turns of thin wire. Here, shunt field winding is connected across the supply voltage, so Ish must be remains constant Here,  Ish = V / Rsh IL = Ia + Ish Eb = V - Ia Ra   Pi= V IL  Pm = Eb Ia    2. Series wound Motor  Circuit diagram of this type of motor shown in below image. In this type of motor field winding is connected in series with armature. When field winding is connected in series with armature winding it carries full load armature current.  It has few turns of thick wire , so it's resistance is very low. Here, Ia = Ise = IL Eb = V -

DC motor is electrical machine which convert electrical energy into mechanical energy. Principal When current carrying conductor  placed between electric field so it experience mechanical force. The force direction is find by Fleming's left hand rule and it's magnitude is calculate by below formula. F = B I L N               where, B = flux density                          L = conductor length                          I  = current Circuit Diagram  Working When we apply supply voltage armature of dc motor start rotating in magnetic field. so armature conductor cuts the magnetic field. So, Due to principle of electromagnetic induction emf is induced in it. Induced emf direction is opposite of applied voltage, so it's called back emf. back emf value is always less than applied voltage. Eb = ( Ф Z N P )/ 60 A Applied voltage has to force current through the armature conductors against this back emf. so electric work done in overc

There are two types of DC Generator Separately exited Self exited Separately exited DC Generator  In these types of generator, Energisation of field magnets is done by separate dc supply. Circuit Diagram Here, Ia  = IL            Eg = V +IaRa+ brush contact drop            Po = V Ia      2. Self exited DC Generator In these types of dc generator, Energisation of field magnets is done by their own field current, so I it's called self exited dc generator. There is small flux present initially due to residual magnetism. So when armature starts the rotate, it produced small emf and small amount of current, which is use for field magnets. According to field winding and armature winding connection dc generator are three types Shunt wound Series wound Compound wound      1. Shunt wound In this type of generator the field winding and armature winding are connected in parallel. Since field winding connected in paralle

Ammeter is device which use for measurement of electric current. Symbol of Ammeter Ammeter is always connected in series to measure a current. Circuit Diagram Working Ammeter must be connected in series, because current is same in series connection. So, When current passed through ammeter, it will show how amount of current passed through in conductor or wire in ampere. It has very law impedance, so loss of power becomes low, If we connect ammeter in parallel than power loss make be high and device may damaged. Types of ammeter According to measurements of current  in different types of supply DC Ammeter AC Ammeter There are generally two types of ammeter Analog Ammeter Digital Ammeter  Digital ammeter shows accurate measurement as compared to analog ammeter

Definition DC generator is device which converts mechanical energy to in form of electrical energy. Principal D.C. generator work on principal of electromagnetic induction. Whenever flux is cut by the conductor dynamically induced emf is produced in it. Basic component of d.c. generator are as below Conductor  Magnetic field For produce dynamically induced emf, three portions are needed Magnetic field   Conductors  Motion of conductor  Magnetic field produce magnetic flux in the machine. The dynamically induced emf produced in the conductor will cause a flow of electric current in it, if the conductor circuit is closed. Working The emf induced in the armature conductors of a DC generator is alternating in nature. It is converts AC into DC in the external load circuit by the split-rings or commutator. According to upper figure in first half rotation current flows through ABRCD. Here B1 brush is connected with segment S1 as the p

High Temperature Alarm Device We use high temperature alarm device for security purposes, because security is necessary everywhere. High Temperature Alarm Device Make alarm device by easy steps at home, video of this device is shown below check now👇👇👇👇 We use high temperature alarm device for security purposes, because security is necessary everywhere. Some places where we use this device, Bank 🏦  Hospital    Industry  School College   Gas station Petrol pump  Etc..   How it works? Due to some fault or incident, Fire 🔥 will be produced. This device most of place on the upper side, Temperature sensor is used in this device. So, when fire is come touch with this device, then alarm start horning. Temperature ranges is fixed previously on it, so if fire cross the range of temperature which set previously then this device come in working condition. So, we can taking action against the fire whenever it's increases and harm