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workshop drawings contractor scope1. air conditioning and ventilation systemsbuilder work drawingsenlarged scale double line hvac system duct amp
i would like to get a project done. i have some plans and i need a cost estimate on how much it will cost to get it
for multi-national business it system free and open source software foss is recommended over a proprietary system. the reasons for this
there are two practical ways of improving commutation i.e. of making current reversal in the short - circuited coil as sparkless as possible. these
q. what is meant by armature reaction. explain briefly the bad effects of armature reactions. sol. by armature reaction is meant the effect of
q. explain why equalizing connection are used in lap winding and dummy coils are some time used in wave winding.sol. for batteies operating in
currents induced in armature conductors of a d.c. generator are alternating. to make their flow unidirectional in the external circuit we need a
q. the armature of 6 -pole dc generator has a wave winding containing 664 conductors. calculate the generator emf when flux per pole is 0.06 weber
q. two shunt wound generators running in parallel supply a total load current of 4000 a. each generator has an armature resistance of 0.02? and a
q. draw the various characterstics of a dc shunt generator and explain critical resistance. sol. following are three most important
these are small poles fixed to the yoke and spaced in bw the main poles. they are wound with comparatively few heavy gauge cu wire turns and are
q. draw the developed diagram of a simplex progressive 2 layer lap winding for a 4 pole generator with 12 coils clearly indicating the position of
q. define coil pitch back pitch front pitch pole pitch commutator pitch resultant pitch multiplex winding and degree of re-entrant of a winding
armature reaction in dc generator armature reaction is the effect of magnetic flux set up by armature current upon the distribution of flux under
q. write a short note on types of enclosure of machine.sol. the various types of d.c. machine
q. what do you understand by demagnetizing and cross magnetizing effects of armature reaction in a d.c. machine. derive the expression for
q. explain the working principle of a d.c. generator. explain clearly the function of commutator in d.c. machines.sol. working principle of a d.c.
q. series generator having a combined armature and field resistance of 0.4? is running at 1000 r.p.m. and delivering 5.5kw at terminal voltage of 110
q. a shunt generator gives full load output of 30 kw at a terminal voltage of 200v. the armature and field resistance are 0.05? and 50? resp.. the
q. what are the different types of dc generation according to the ways in which fields are excited. show the connection diagram of each type.ans.
q. an 8 - pole dc generator has 500 armature conductors and has a useful flux per pole of 0.065 web. what will be the emf generated if it is lap
q. derive the expression for generated emf in a dc generator.ans.expression for generated emf in a dc
q. in a 110v compound generator the armature shunt and series winding resistance are 0.06? 25? and 0.04? respectively. the load consists of 200
dummy coils these coils are used with wave winding and resorted to when the requirement of the winding are not met by the standard armature punching
q. list and explain the factors involved in the voltage build up of shunt generator.ans.following factors are involved in voltage build up of