At 6V a servo has a stall torque of 2.5 kg-cm. a) What would the stall torque be at 4V? b) What is the allowable stall torque so the servo will not exceed 30% of the stall torque?
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At 6V a servo has a stall torque of 2.5 kg-cm.
a) What would the stall torque be at 4V?
b) What is the allowable stall torque so the servo will not exceed 30% of the stall torque?
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- Q2- What is the Working Principle of DC Servo Motor4) A dc. ahunt machine while running as generator develops a voltage of 240 V at 1000 rpm. on no-load It has armature resistance of 0.5 12 and field resistance of 250 2. When the machine runs as motor, input to it at no-load ts 4 A at 240 V. Calculate the speed and efficiency of the machine when it runs as a motor taking 40 A at 240 V. Armature reaction weakens the field by 6%A series motor runs at 800 rev/min when the voltage is 400V and the current is 25A. The armature resistance is 0.4 ohm and the series field resistance is 0.2 ohm. Determine the resistance to be connected in series to reduce the speed to 600 rev/min with the same current.
- The armature circuit of a free excited direct current motor with a nominal voltage of 600 V is fed from an adjusted direct voltage source. The excitation circuit is also powered from a regulated voltage source. It is used in an application that requires motor speed adjustment. The speed of the motor at the nominal armature voltage was measured as 1600 rpm. All losses of the motor and voltage source and the effect of armature reaction are neglected. It is accepted that the engine is not saturated.Answer the questions below.a) Draw the armature and excitation circuit of the motor and write the formulas for the equivalent circuit.b) If the load moment of the motor at the nominal armature voltage is 420 Nm, then calculate the armature current and the input power of the motor.c) If the armature voltage of the motor is kept constant at 600 V and the excitation current is decreased until the speed reaches 4000 rpm, then calculate the shaft moment. Show this working area on the M = f (W) axis.A 20 kW shunt machine having an Armature circuit Resistance of 0.5 N and a filed resistance of 1200, generates a terminal voltage of 240 V at full load. Find the Efficiency When act as a Generator at full load and act as a Generator at half load and act as a Motor Assume the Iron, Friction and Windage losses are 0.8 kW. I need all clear steps Please clear writeReport: 1. Draw in graph paper the relationship between the speed (5) and Torque(Ia). 2. Draw in graph paper the relationship between the speed (5) and Torque(Po). 3. Discuss the graphics between the (5 & Ia).
- A 200V long-shunt generator delivers 100A, has an armature resistance of 0.050, a series field resistance of 0.250 and a shunt field resistance of 2000. If a brush contact drop of 2.5V IS considered, what will be the developed power inside the armature of the machine?10. What is a potent PRACTICAL APPLICATIONS 1. You are an electrician on the job. It is decided that the speed of a large DC motor is to be reduced by connecting a resistor in series with its armature. The DC voltage applied to the motor is 250 V, and the motor has a full-load armature current of 50 Your job is to reduce the armature current to 40 A at full load by connecting the resistor in series with the armature. What value of resistance should be used, and what is the power rating of the resistor? 2. You are working on an electronic circuit. The circuit current is 5 mA. A resistor is marked with the following bands: brown, black, red, gold. A voltmeter measures voltage drop of 6.5 V across the resistor. Is this resistor within its tolerance rati 3. A homeowner uses a 100-watt incandescent lamp as a heater in an outside w pump house to protect the pump from freezing in cold weather. Unfortunately however, the lamp can burn out and leave the pump unprotected. You have b asked to…80.5% O A series motor runs at (800 r.p.m) when the voltage is (400 V) and the current is (25 A). The armature resistance is (0.4 Q) and the series field resistance is (0.2 Q). Determine the resistance to be connected in series to reduce the speed to (600 r.p.m) with same current 3.85 O 4.25 2.85 O A shunt generator is running at 1000 rpm. If flux is reduced by half, then what is
- hi tutor this subject is all about Dc machine Please help me ASAPAt rated load, a shunt motor draws an armature current of 100 A from a 240 V source while running at 1000 rpm producing a back emf of 228 V. At no load, the armature current drops to 5 A that produces a back emf of 235 V. How fast does the motor run at no load?Ashunt-wound DC motor with the field coils and rotor connected in parallel (Figure 1) operates from a 130 V DC power line. The resistance of the field windings, R, is 208n. The resistance of the rotor, R, is 4.90 2. When the motor is running, the rotor develops an emf E. The motor draws a current of 4.46 A from the line. Friction losses amount to 45.0 W Part C Compute the emf E. > View Available Hint(s) undo redo Tese keyboard shortcuts Help Submit Part D Compute the rate of development of thermal energy in the field windings. Express your answer in watts. > View Available Hint(s) Temglates Symbols undo redo Teset keyboard shortcuts Help Paindings Figure 1 of 1> Submit Part E Compute the rate Pin rotor of development of thermal energy in the rotor. Express your answer in watts. Re E. R, > View Available Hint(s) Templates Symbols undo redo feset keyboard shortcuts Help Pn,rotor = W