D.C. MOTOR PRINCIPLE

explain DC MOTOR PRINCIPLE .

When a conductor is placed in magnetic field is produced on the conductor.

This force is given by F = B.L.I. Newton.

The direction of the force is given by Fleming's left hand rule.

F = B.LI. newtons

B = magnetic flux density in weber/m2

I = current in conductor in amperes

1 = length of conductor in metres

The electric motor converts electrical energy into mechanical energy or motion by using electromagnetic induction.

When the field magnets of the motor are excited and it's Armature conductors are supplied with current from the supply mains, then they experience a force tending to rotate the armature

Armature conductors under North pole are assumed to carry currents downwards (crosses) and those under South-pole to carry currents upwards (dots). The direction of this force is given by Fleming's Left Hand Rule (also known as motor rule).

. It is seen that each conductor experiences a force F which tends to rotate the armature in anti-clock wise direction as shown by the arrows placed above conductors.

. These forces combine and produce driving torque to keep the armature rotating.

Comments

What is two transistor model of scr ? Explain SCR

Power electronics Two Transistor Model of SCR full explain and pdf. Basic operating principle of SCR, can easily be understood by the two transistor model of SCR , as it is a combination of p and n layers. This is a pnpn thyristor. If we bisect it through the dotted line then we will get two transistors i.e. one pnp transistor with J 1 and J 2 junctions and another is with J 2 and J 3 junctions as shown in figure below. The relation between the collector current and emitter current is shown below Here, I C is collector current, I E is emitter current, I CBO is forward leakage current, α is common base forward current gain and relationship between I C and I B is Where, I B is base current and β is common emitter forward current gain. Let’s for transistor T 1 this relation holds And that for transistor T 2 Now, by the analysis of two transistors model we can get anode current, From equation (i) and (ii), we get, If applied gate current is I g then cathode current will b...

Gtu sem 5th python programming ( 3151108 ) question paper download

Python programming (3151108)exam questions paper summer 2022. Gtu python programming paper download. plication (MCA) , PDDC , Diploma Of pharmacy (D.pharm) , Diploma engineering. While you searched for download GTU B.E. CIVIL SEM 5 3151108 Python Programming gtupaper.in past exam papers.You might have gone to other sites on the internet along with the official gtu site i.e. gtu.ac.in but you must be confused there with your download GTU B.E. CIVIL SEM 5 3151108 Python Programming gtupaper.in past exam papers. AS you dont know the subject code of GTU B.E. CIVIL SEM 5 3151108 Python Programming gtupaper.in .That`s what we were filling lack of. So we created sudybudyy.in Hey students, simply long press on image to download , you get download image option. Here, on gtupaper.in You don`t need to remember your GTU B.E. CIVIL SEM 5 3151108 Python Programming gtupaper.in subject code.You just select your branch from be , bpharm , mba , mca , dpharm , mpharm , pddc , me and diploma...

What is unit vector :- explain unit vector

Electromagnetic fields Unit vector- A unit vector has a function to indicate the direction. Its magnitude is always unity, irrespective of the direction which it indicates and the co-ordinate system under consideration. Thus for any vector, to indicate its direction a unit vector can be used. Consider a unit vector āoA in the direction of OA as shown in o the Fig. This vector indicates the direction of OA but its magnitude is unity. Fig Unit vector aOA So vector OA can be represented completely as its magnitude R and the direction indicated by unit vector along its direction. ŌĀ = |OA| āOA =R āOA āOA=1

Study

Search This Blog