In a d.c. machine stray loss is the sum of
WebIron losses in a D.C. machine are independent of variations in Armature reaction of an unsaturated D.C. machine is Eddy currents are induced in the pole shoes of a D.C. machine due to In case of D.C. machine winding, number of commutator segments is equal to The function of pole shoes in the case of D.C. machine is WebIn a D.C. machine stray loss is the sum of 37. Which of the following statement about D.C. generators is false? 38. The armature core of a D.C. generator is usually made of 39. In D.C. generators, current to the external circuit from armature is given through 40.
In a d.c. machine stray loss is the sum of
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WebApart from the major losses as enumerated above there may be a small amount loss called stray loss occur in a machine. Stray losses are difficult to account. Power flow diagram of a d.c motor is shown in figure 40.1. A portion of the input power is consumed by the field circuit as field copper loss. WebThe losses that occur in a DC Machine is divided into five basic categories. The various losses are Electrical or Copper losses (I 2 R losses), Core losses or Iron losses, Brush losses, Mechanical losses, Stray load losses. These losses are explained below in detail. Contents: Electrical or Copper losses
WebIn a D.C. machine stray loss is the sum of total copper loss and mechanical loss armature copper loss and iron loss shunt field copper loss and mechanical loss iron loss and mechanical loss View answer 47. In a four-pole D.C. machine all the four poles are north poles alternate poles are north and south all the four poles are south poles WebMar 20, 2013 · In DC Machine, there are broadly four main categories of energy loss. Copper Losses or Electrical Losses in DC Machine or Winding Loss The copper losses are the …
WebWhich motor should not be started on no-load Cumulatively compounded motor Shunt motor Differentially compounded motor Series motor In a D.C. machine stray loss is the sum of … WebIn the full-load loss, this loss is about 10% – 20%. #7. Stray Losses: These are mixed types of losses and there are factors to consider in this loss. Distortion of flow due to armature reaction The short circuit inside the coil. Due to the AD current inside the conductor, there is an excess copper loss.
WebMar 3, 2024 · These losses are usually very small about 15% of full load loss. Stray Load Losses in DC Machine: ... Variable losses are equal to the constant losses of the DC generator i.e. armature circuit loss is equal to the sum of no-load rotational loss and field circuit loss. Variable loss - Constant loss = 0 ...
WebIn a D.C. machine stray loss is the sum of - iron loss and mechanical loss 84. Lap winding is composed of - any even number of conductors 85. In a D.C. generator in case the resistance of the field winding is increased, then output voltage will - decrease. 86. An exciter for a turbo generator is a how many inches is 533mmWebIn a D.C. machine stray loss is the sum of? Last Answer : In a D.C. machine stray loss is the sum of iron loss and mechanical loss. 1 answer. 3.0k views. ... Last Answer : To avoid formation of grooves in the commutator of a D.C. machine the brushes of opposite polarity should track each other. 1 answer. 163 views. open; circuited; armature; how many inches is 50 mlWebIn a D . C . machine stray loss is the sum of (a) ... In a level compounded D.C. generator, full load terminal voltage is (a) negligibly low (b) equal to no-load terminal voltage (c) more than no-load terminal voltage (d) less than no-load terminal voltage Ans: b 563. how many inches is 5/16 inchWebIn a D.C. machine stray loss is the sum of A). Total copper loss and mechanical loss B). Armature copper loss and iron loss C). Shunt field copper loss and mechanical loss D). Iron loss and mechanical loss In a D.C. machine stray loss is the sum of how many inches is 5/16WebA DC shunt generator delivers 45 A at a terminal voltage of 220 V. The armature and the shunt field resistances are 0.01 Ω a n d 44 Ω respectively. The stray losses are 375 W. The percentage efficiency of the DC generator is ____________. … how many inches is 53.3 cmWebIn a D.C. machine stray loss is the sum of A. Total copper loss and mechanical loss B. Armature copper loss and iron loss C. Shunt field copper loss and mechanical loss D. Iron … how many inches is 5 10 feetWebIn a D.C. machine stray loss is the sum of Iron loss and mechanical loss Shunt field copper loss and mechanical loss Total copper loss and mechanical loss Armature copper loss … how many inches is 5 10 inches