2-Explain the difference between a Wound and a squirrel -cage motor.
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- A series motor runs at 700 rev/min when the voltage is 300 V and the current is 20 A. The armature resistance is 0.3 2 and the series field resistance is 0.1 2. Determine the resistance to be connected in series to reduce the speed to 500 rev/min with the same currentExplain how does the current will be reduced during the starting of the motor.14.a. Jogging a motor is accomplished byA. manually turning its shaft.B. reducing its armature current.C. momentarily energizing the starter.D. blocking the motor from rotating.14.b. How does change in resistance affect the speed of a DC motor?A. Increasing the armature resistance decreases the motor's speed.B. Reducing the field resistance increases the motor's speed.C. Increasing the field resistance decreases the motor's speed.D. Reducing the armature resistance decreases the motor's speed.
- 15. What are the following statements are true for DC Motor? I. Motor converts Electrical Energy to Mechanical Energy II. Motor supply current to the armature winding III. Back EMF is lesser than the Supply voltage IV. Fleming's Right-hand rule a. I and II b. II and IV c. I,II and III d. I,II and IVsmall permanent magnet DC motor has an armature resistance of 3.5 ohm and armature voltage of 7 v the motor acchi Odia no load speed of 11500 r per minute while drawing and armature current 15 ma and determine the motor da constant kmGENERAL INSTRUCTIONS: SOLVE EACH OF THE FOLLOWING PROBLEMS AND SHOW YOUR SOLUTIONS FOR EACH ITEM. 1. A long-shunt compound generator supplies 50 kW at 230 V. the total field- and armature circuit resistances are 46 ohms and 0.03 ohms , respectively. The brush-contact drop is 2 V. Determine the percent voltage regulation. Neglect the armature reaction.
- The current drawn by a 120 V d.c. motor with back e.m.f. of 110 V and armature resistance of 0.4 ohm is AA four-pole DC shunt motor, 220 V, the number of conductors in the armature 1000, the typical winding coil, the motor draws 52 A, the magnetic flux per pole 0.02 Wb, the armature resistance 0.2 02, and shunt resistance 110 Q. Calculate motor speed.A 220 V shunt motor has armature and field resistances of O.5 Q and 220 0 respectively. Initially, the motor is running at 1000 rpm by drawing 10 A current from the supply for fan type of load. Calculat, the new armature current if an external armature resistance of value 5 Q is inserted in the armature circuit. 12 A 5 A O 7A 10 A