Electric Motor Control
10th Edition
ISBN: 9781133702818
Author: Herman
Publisher: CENGAGE L
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Chapter 56, Problem 3SQ
To determine
Name the device that is suited for maintaining a large difference in the input and output speed and explain the reason.
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Chapter 56 Solutions
Electric Motor Control
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- Write the control mechanism of stepper motor .arrow_forwardQ.) Explain wave stepping and full stepping in stepper motor control. What is the main difference between them ...?arrow_forwardA 25 kW, 50 V separately excited DC drive is operated at a constant speed of 3000 rpm with a constant field current such that the open-circuit armature voltage is 50 V. The armature resistance of the drive is measured to be 0.012 Ω. The effects of armature reaction may be assumed to be negligible.a)Calculate the armature current, input power, mechanical power and torque when the terminal voltage is 55 Volts.b) Calculate the armature current, input power, mechanical power, and torque when the terminal voltage is 44 Volts.c) The drive design is now modified to include a variable resistance (RV), in series with the armature, increasing the overall armature resistance. RV has a range between 0.01 Ω (minimum) to 0.1 Ω (maximum). If the terminal voltage is 60V, calculate new range (maximum and minimum values) of armature current, input power, mechanical power and torque with the variable resistance added. d) State whether the drive is operating as a motor or a generator for this operating…arrow_forward
- 16.a. Enclosures housing motor control equipment in a dusty indoor environment where there is danger ofexplosion should be classified asA. NEMA 7.B. NEMA 12.C. NEMA 1.D. NEMA 9.16.b. Feedback is used in drive systems toA. remove the load quickly and accurately.B. give the drive information on the status of the motor and load.C. give operators information on the status of the drive.D. reduce the startup torque of the motor and load.arrow_forwardDC motors are often used as the main actuator within control andmechatronics systems.a) Explain why DC motors are so common in this field of engineering, what are their advantages and disadvantages?b) Often DC motors are required to operate in both forward and reverse directions. Explain using sketches how this functionality can be achieved.arrow_forwardIdentification of the physical system components and system integration: draw ablock diagram representing the QUBE-Servo 2 system indicating all the variables, signals,and the control system components. Please could you show what the in detail block diaagrams are given that the input and output of the servocontrol system are:• input: voltage of the motor in V;• output: inertia disk angular position in rad.arrow_forward
- The armature, series field and shunt field resistances of a 125kW, 250V long shunt cumulative compound dc generator are 0.025-ohm, 0.01 ohm and 30 ohms, respectively. If the stray power loss at rated load is 5kW, determine the motor brake horsepower required to drive this machine. Assume a brush drop of 2V and a stray load loss of 1% of the output.arrow_forwardtask 6 Analyse the performance of a DC motor speed control when subjected to external disturbances.arrow_forwardDescribe simply, in one(1) sentence, how we can increase the value of the armature current in a shunt dc motor in the case of an increase in load while keeping the input power supply constant?arrow_forward
- Explain the differences between the stepper motor, servo motor and DC motor? Explain their interfacing with Arduino?arrow_forwardA 54-slot 216-segment armature has a four-pole lap armature that is equalized 100 per cent at the commutator. (a) How many equalizer connections are there? (b) To what two segments is the first equalizer connected?arrow_forwarda 220v dc shunt motor takes 5a and 40a at no load and full load respectively it has an armature resistance of 0.2 ohm and field resistance of 110 ohm respectively. iron,friction and windages losses are negligible.then using among parameters find following. calculate emf at full load of dc motorarrow_forward
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