“Los sensores son los dispositivos que convierten (traducen) una magnitud física en una señal eléctrica. Se utilizan muchos tipos de sensores y su clasificación depende del principio de func…Descripción completa
seat ibiza cordoba 1997
DATOS TECNICOS SEAT IBIZA
Caso SEATDescripción completa
seatDescription complète
ff
manual de talle
Weber Aircraft Economy Seat Model 5751Full description
Descripción completa
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Full description
SEATWORK 1. A 500Hp, 600 Volts shunt motor operates at a speed of 495rpm at full load. If the motor design constant k=1.3x10−7, flux per pole is 9.1x106 Maxwells. What is the counter emf ?
2. A 6 pole, lap-wound armature, having 720 conductors, rotates in a field of 20.35 mWb. If the armature current is 78 Amp. What is the torque developed by the armature?
3. In a 5Hp, 230 Volts, 1500rpm shunt motor, the resistance of the armature including brushes is 0.175 ohm and that of the shunt field is 610 ohms. The stray power losses when the motor delivers rated load at rated voltage is 305 Watts. The efficiency at rated load is nearest to?
4. A series motor takes 285 Amperes and develops 153 lb-ft when operating at 1200 rpm. Calculate the torque when the current drops to 210 Amperes and flux is decreased by 18%?
5.
A 220 V shunt motor driving its normal load draws an armature current of 50 A from a 220 V DC source. The The armature resistance resistance of this motor including brushes brushes is 0.25 ohm. How much armature current (minimum) (min imum) will this motor draw from a 200 V dc source when driving the same load with the field adjusted to maintain the same speed?
6.
At rated load, a shunt motor draws an armature current of 50 A from a 230V, dc mains while running at 1000 rpm. At no load the armature current drops to 5A. if the effect of the armature reaction has weaken the flux by 12% from no load to full load, determine the speed of the motor at no load. Assume the armature resistance to be 0.15 ohm?
7.
A 400V series motor, having an equivalent armature circuit resistance of 0.5 ohm, takes 44A of current while running at 650 rpm. What is the motor speed for a line current of 36A?
8.
A 220V DC motor has armature resistance of 0.4 ohm, field resistance of 175 ohm and series resistance of 4 ohms. The machine is connected as a short shunt compound motor to 220V mains. Calculate the power developed by the armature if the armature current is 30A? 30 A?
