shunt motor of 75 hp and 240 V, has a voltage drop in brushes of 5 V and an armature  resistance of 0.23 ohms. The field resistance is 200 ohms. At no load the motor draws 20 A and  has a speed of 2500 rpm. Calculate:  a).-The speed of the motor at nominal current if this has an efficiency of 85%.  b) - The motor speed at full load if the field current is increased to 1.56 amperes and is on the  linear part of the magnetization curve.  c).-The torque developed at full load in Nm   d).-The torque developed at half load in lb-ft.  e).- the torque delivered by the motor at full load.

Q: A long compound DC generator feeding a load of current 100 A, at a voltage of 230 V. Calculate the…

A: Given: Current, IL=100A, Resistance, Ra=0.04ΩRsh=115ΩRse=0.01Ω Voltage, V=230V

Q: A 200 V, 10 A, 1000 rpm, separately excited d.c. motor has an armature resistance of 3 Q. The motor…

A: Given data:Required information:The value of the duty cycle of the chopper.

Q: A series motor runs at 700 rev/min when the voltage is 300 V and the current is 20 A. The armature…

A: Initial speed of motor N1=700 rpm. Initial terminal voltage V1=300 V. Armature current Ia=20 A.…

Q: A 220 V, 15 kW, 850 r.p.m. shunt motor draws 72.2 A when operating at rated condition. The…

A: I have written this solution as handwritten solution. Hope you find the perfect solution.

Q: A DC series motor rotates at 1200 rpm and draws 40 A at 240 V. The armature and field resistances…

A: The speed of the motor, The current drawn by the motor,The terminal voltage,The  iron and friction…

Q: A 480 V, 988 r.p.m. d.c. shunt motor its full-load efficiency of 88 percent. The armature circuit…

A:

Q: series motor runs at (800 r.p.m) when the voltage is (400 V A). The armature resistance is (0.4 Q)…

A:

Q: Ashunt-wound DC motor with the feld coils and rotor connected in parallel (Figure 1) operates from a…

A: From the DC shunt motor equivalent circuit

Q: A 250V series motor runs at 500 rpm at rated load current of 75 A. The armature circuit has a…

A: It is given that: V=250 VN1=500 rpmIL1=Ia1=75 ARa+Rse=0.2 Ωϕ α Ia

Q: A long compound DC generator feeding a load of current 100 A, at a voltage of 230 V. Calculate the…

A:

Motor Load, Torque, and Power Quality Requirement

An electric motor is a gadget that changes electrical energy into mechanical energy over to follow up on a mechanical burden. The weight set on the motor because of this mechanical movement is known as motor load. Appropriately matching the motor burden to the engine is vital to forestall harm to the engine or wasteful and unnecessary expensive activity. Engines perform such undertakings as moving a thing starting with one spot then onto the next, cutting it, changing its shape, etc. The motors might be evaluated as far as a few variables including power yield, voltage, current, and temperature. Harm to an engine might happen when it is worked under over the top engine load contrasted with its appraised limit.