Speed of dc shunt motor can be increased by
WebIf the speed of a D.C. shunt motor is increased, the back e.m.f. of the motor will (A) Increase (B) Decrease (C) Remain same (D) Become zero Answer: Option A Q 22. Torque developed by a D.C. motor depends upon (A) Magnetic field (B) Active length of the conductor (C) Current flow through the conductors (D) All above factors Answer: Option D Q 23.
Speed of dc shunt motor can be increased by
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WebThe speed of a DC shunt motor can be increased by _____ Sparking is discouraged in a DC motor. Which of the following is the correct formula for calculating step resistance? In 4-point starters the resistance is added in series with NVC because _____ Speed control by Ward Leonard method, can give uniform speed variation _____ ... WebFeb 24, 2012 · Since, I a ∝ Τ given by. The change in armature current and torque on supplying load is graphically shown below. This increase in the …
Web14. The speed of a dc shunt motor supplying a load at its rated speed can be reduced by (a) connecting an additional resistance in the armature circuit. (b) connecting an additional resistance in the field circuit. (c) increasing the applied voltage. (d) … WebThe speed of a DC shunt motor can be increased by _____ Sparking is discouraged in a DC motor. Which of the following is the correct formula for calculating step resistance? In 4 …
WebThe speed of a D.C. shunt motor can be increased by A. Increasing the resistance in armature circuit B. Increasing the resistance in field circuit C. Reducing the resistance in … WebMar 30, 2024 · The speed of a DC motor is directly proportional to the voltage across the armature terminals and inversely proportional to the flux (φ) due to the field windings (N ∝ 1 / φ), that is N ∝ 1 / I sh.. In a shunt motor, the shunt field current Ish is always a constant since the field winding is connected in parallel to the armature winding and the supply …
WebThe speed of DC shunt motor can be increased above its rated speed by. Increasing the supply voltage within its rated value. Increasing the flux per pole. Decreasing the flux per pole. Connecting additional resistance in series of the armature. Right Answer is:
WebJan 29, 2024 · Detailed Solution. Download Solution PDF. The speed of the DC motor obtained from speed equation is inversely proportional to flux produced by the field. So, … px 200 vespa usataWebThe shunt field current is given by the equation shown below: The connection of RC in the field reduces the field current, and hence the flux is also reduced. This reduction in flux increases the speed, and thus, the motor runs at a speed higher than the normal speed. px 30 pistolWebJan 31, 2024 · 1 Answer. Sorted by: 3. The instant flux is reduced, the back emf reduces and this causes the armature to increase current. More current means a higher driving torque … px 29 palmsWebThe increased speed may cause the motor to overspeed, which can be dangerous and can result in damage to the motor or driven equipment. B) If the armature resistance of a DC … px 200 malossi v oneWeb4. A dc series motor is operating at rated speed with rated excitation. It has two resistances R 1 and R 2 connected across the field and the armature respectively. Speeds above the rated speed can be obtained by (a) increasing R 1 only. (b) reducing R 2 only. (c) reducing R 1 and increasing R 2. (d) increasing R 1 and reducing R 2. px 200 vespa kaufenWebA 240 V, dc shunt motor draws 15 A while supplying the rated load at a speed of 80 rad/s. The armature resistance is 0.5 W and the field winding resistance is 80 W. The net Voltage across armature resistance at the time of plugging will be Last Answer : A 240 V, dc shunt motor draws 15 A while supplying the rated load at a speed of 80 rad/s ... px 200 sennheiserWebFeb 24, 2012 · The speed control of DC series motor can be accomplished by supplying the power to the motor from a separate variable voltage … px 4 pill