Description : The torque, in a _____________is proportional to the square of the armature current (A) DC shunt motor (B) stepper motor (C) 2-phase servomotor (D) DC series motor
Last Answer : (D) DC series motor
Description : An a.c. tachometer is just a ________with one phase excited from the carrier frequency. (A) two-phase A.C. servomotor (B) two-phase induction motor (C) A.C. operated universal motor (D) hybrid stepper motor.
Last Answer : Ans: D This is a special purpose machine whose stator coil can be energized by electronically switched current.
Description : A 1.8°step, 4-phase stepper motor has a total of 40 teeth on 8 pole of stator. The number of rotor teeth for their rotor will be (A) 40 (B) 50 (C) 100 (D) 80
Last Answer : (B) 50
Description : Stepper motors are_____ A. AC motors B. DC motors C. Electromagnets D. None of above
Last Answer : B. DC motors
Description : The most suitable servomotor for low power applications is (A) a dc series motor. (B) a dc shunt motor. (C) an ac two-phase induction motor. (D) an ac series motor.
Last Answer : (B) a dc shunt motor.
Description : When three-phase AC power is supplied to the device shown in the illustration, the output will be _____________. EL-0063 A. single-phase AC B. split-phase AC C. three-phase DC D. unidirectional DC
Last Answer : Answer: D
Description : Selecting a correct DC stepper motor for a project?
Last Answer : You will need to calculate the moment of inertia of the shaft you are turning so you can determine the required torque. You will get that after you determine the peak acceleration from the velocity ... Once you have acceleration, displacement, and moment of inertia you can size the motor for power.
Description : In the actuator arm assembly of a hard disk drive transport, what device can position the magnetic heads to the correct track of a hard disk more accurately than a dc stepper motor?
Last Answer : Voice coil servo.
Description : What part of a floppy disk drive transport uses a dc stepper motor to position the magnetic heads over the recording surface of a floppy disk?
Last Answer : Actuator arm assembly.
Description : Write two application of the following motor (i) AC servo motor (ii) Stepper motor
Last Answer : (i)Applications of AC Servo Motor: 1. Computers 2. Robotics and toys 3. CD/DVD players 4. Textile industries 5. Instrument servos 6. Tracking and guidance system 7. Self- ... Laser cutters 20.Extruders 21.Engravers 22.Analytical and Medical instruments 23.Embroidery Machines 24.Packeging Machines
Description : Which type of AC single-phase motor will also operate on direct current? A. Split-phase B. Series-wound C. Shaded-pole D. Repulsion-start
Last Answer : Answer: B
Description : For a 1.8o, 2-phase bipolar stepper motor, the stepping rate is 100 steps/second. The rotational speed of the motor in rpm is (A) 15 (B) 30 (C) 60 (D) 90
Last Answer : For a 1.8o, 2-phase bipolar stepper motor, the stepping rate is 100 steps/second. The rotational speed of the motor in rpm is 30
Description : The speed of a 2-pole, 3-phase stepper motor operated by 1200 pulses/min (A) 100 rpm (B) 200 rpm (C) 400 rpm (D) 800 rpm
Last Answer : The speed of a 2-pole, 3-phase stepper motor operated by 1200 pulses/min 200 rpm
Description : An 1.8° step, 4 -phase stepper motor has 40 teeth on 8 poles of the stator. The number of rotor teeth for their rotor will be: (A) 40 (B) 50 (C) 100 (D) 80
Last Answer : An 1.8° step, 4 -phase stepper motor has 40 teeth on 8 poles of the stator. The number of rotor teeth for their rotor will be: 50
Description : What Is Stepper Motor. what Is Its Uses?
Last Answer : Stepper motor is the electrical machine which act upon input pulse applied to it. it is one type of synchronous motor which runs in steps in either direction instead of running in complete cycle.so, in automation parts it is used.
Description : A 3 stack stepper motor with 12 numbers of rotor teeth has a step angle of ____________. (A) 12° (B) 8° (C) 24° (D) 10°
Last Answer : Ans. D Given m = 3, Nr = 12 Step angle = 360 / m x Nr = 360 /3 x 12 = 10°
Description : In a stepper motor the angular displacement (A) can be precisely controlled. (B) it cannot be readily interfaced with micro computer based controller. (C) the angular displacement cannot be precisely controlled. (D) it cannot be used for positioning of work tables and tools in NC machines.
Last Answer : (A) can be precisely controlled.
Description : A large dc motor is required to control the speed of the blower from a 3 -phase ac source. The suitable ac to dc converter is, 3 -phase (a) Fully controlled bridge converter ( ... bridge converter with freewheeling diode (c) Half controlled bridge converter (d) Converter pair in sequence control
Last Answer : a fullu control
Description : The speed of a multi-speed, squirrel-cage, induction motor operating in a fixed frequency system can be changed by _____________. A. reconnecting stator windings for different numbers of poles B. ... sequence of the applied voltage D. reconnecting the stator so that no poles have the same polarity
Last Answer : Answer: A
Description : If the supply voltage is 220 volts 60 Hz, what is the operating voltage of the motor controller circuitry illustrated? EL-0011 A. 110 volts DC B. 110 volts AC C. 220 volts DC D. 220 volts AC
Description : A short in the shunt field of a DC motor is best located by _____________. A. visual inspection of the commutator B. applying AC voltage to each field coil and measuring the voltage drop across ... using a growler and hacksaw blade D. isolating each coil from the others and using a megohmmeter
Description : When an AC or a DC motor fails to start, the FIRST step in troubleshooting should be to check the ____________. A. motor windings for obvious opens B. motor controller leads for continuity C. fuse or circuit breaker D. motor controller leads for grounds
Last Answer : Answer: C
Description : The most common source of excitation for synchronous motors is a/an _____________. A. low voltage battery B. motor attenuator set C. DC exciter generator D. AC supply
Description : AC and DC generators are similar in that they _____________. A. both generate alternating voltages B. both rectify the voltage before delivery C. are constructed at the same physical size for the same kilowatt rating D. both supply three-phase power
Description : The output voltage of a three-phase alternator is regulated by the _____________. A. AC voltage to the armature B. AC voltage to the field C. DC voltage to the armature D. DC voltage to the field
Description : Compare Single phase 25 kV AC and 1500 V DC track electrification.
Last Answer : Points Single phase 25 kV AC track Electrification 1500 V DC track electrification Supply given to O/H condition 1-ph, 25KV, AC 50 Hz 600/750V-Tromways 1500/3000V urban/suburban ... track distance Less More Applications Main line services Urban and suburban area
Description : A single-phase fully controlled thyristor bridge ac-dc converter is operating at a firing angle of 25o and an overlap angle of 10o with constant dc output current of 20 A. The fundamental power factor (displacement factor) at input ac mains is (A) 0.78 (B) 0.827 (C) 0.866 (D) 0.9
Last Answer : A single-phase fully controlled thyristor bridge ac-dc converter is operating at a firing angle of 25o and an overlap angle of 10o with constant dc output current of 20 A. The fundamental power factor (displacement factor) at input ac mains is 0.78
Description : The speed-torque characteristics of a DC series motor are approximately similar to those of the _________motor. (A) universal (B) synchronous (C) DC shunt (D) two-phase
Last Answer : Ans: A Universal motor has same characteristics as DC series motor and also known as an a.c series motor.
Description : The reversal of an AC, three-phase, induction motor is accomplished by ______________. A. changing all three motor leads B. reversing the position of the slip rings C. interchanging any two of the three motor leads D. interchanging any two brushes
Description : In the illustrated ground detection system with a ground on phase A, if the switch is opened __________. EL-0009 A. lamp A will dim or go out depending on the severity of the ground B. all three ... lamp A will be brighter D. lamp A will start flickering if the ground is in an AC induction motor
Description : A single-phase half-controlled rectifier is driving a separately excited dc motor. The dc motor has a back emf constant of 0.5 V/rpm. The armature current is 5 A without any ripple. The armature resistance is 2 Ohm. The ... of the motor will be (A) 339 rpm (B) 359 rpm (C) 366 rpm (D) 386 rpm
Last Answer : 359
Description : The no-load speed of a single-phase SCR bridge converter fed separately excited dc motor operating at a firing delay angle, α and flux, Φ (A) directly proportional to α and Φ (B) ... proportional to α and inversely proportional to Φ (D) directly proportional to Φ and inversely proportional to α
Last Answer : The no-load speed of a single-phase SCR bridge converter fed separately excited dc motor operating at a firing delay angle, α and flux, Φ directly proportional to α and inversely proportional to Φ
Description : Describe the construction and working principle of single phase AC motor.
Last Answer : construction and working principle of single phase AC motor : Single phase induction motors have a phase distributed winding on the stator and a squirrel cage short-circuited winding on the rotor. ... is the basic working principle of induction motor of either type, single phase of 3 phase.
Description : Which single phase ac motor will you select for record players and tape recorders? a) Hysteresis motor b) Shaded pole motor c) Reluctance motor d) Two value capacitor motor
Last Answer : Which single phase ac motor will you select for record players and tape recorders? Hysteresis motor
Description : The relative speed between the magnetic fields of stator and rotor under steady state operation is zero for a (A) dc machine. (B) 3 phase induction machine. (C) synchronous machine. (D) single phase induction machine.
Last Answer : Ans: all options are correct
Description : In the flow of one cycle of single phase AC current past any given point in a circuit, the maximum current peak occurs _____________. A. one time B. two times C. three times D. four times
Description : The circuit illustrated represents a single phase AC ground detecting system. If a ground occurs on line 'B', which of the lamps will burn the brightest? EL-0008 A. X B. Y C. Both will be equal brightness. D. both will go out.
Description : What type of gating signal is used in single phase ac voltage controller with RL load?
Last Answer : High frequency carrier gating signal is used for single phase ac voltage controller with RL load.
Description : What is a stepper motor in Arduino?
Last Answer : A stepper motor in Arduino is a type of motor that can be used for precise control of position, speed, and acceleration.
Last Answer : A stepper motor is a type of motor used in Arduino projects that can rotate to a specific position based on a signal sent by an Arduino board.
Description : Programming a NEMA 17 stepper motor to microstep with an Arduino?
Last Answer : There are literally thousands of arduino code examples out there. This is something you should figure out on your own because the act of doing so will make you a better tinkerer. A typical stepper will have like ... digital I/o pins to output the step sequence. Even an uno or mini pro will do that.
Last Answer : Stepper Motor Such One Kind of Motor Which Equal In the corner Rotation Generated By To whom Step To say Is Since Step by step Step by step Equal In the corner Rotation Creation By So This one Stepper Motor Says.
Description : Where is the stepper motor located in peugeot?
Last Answer : Need answer
Description : How do I clean a stepper motor Peugeot 206?
Description : How much does it cost to get a replacement stepper motor?
Last Answer : The cost for a replacement stepper motor wil depend greatly on the exact type of motor to be relced. Stpper motors are availbl in 100's of varieties at the low end th cost is $25,but can reach into the thousands.
Description : What's the purpose of a stepper motor?
Last Answer : Industrial applications of a stepper motor are in multi-axis machine CNC machines.They are also commonly usd in are used in floppy disk drives, flatbed scanners,and computer printers.
Description : What is a stepper motor driver used for?
Last Answer : You can find good cheap stepper motor drivers rebuilt online at a hobby electronics website. the driver tell the stepper motor how many steps to take at a time.
Description : List applications of stepper motor.
Last Answer : Applications of Stepper Motor: 1) Computer controlled systems 2) Numerical control of machine tools 3) Tape drives 4) Floppy disc drives 5) Computer printers 6) X-Y plotters 7) ... ) Extruders 21) Engravers 22) Analytical and Medical instruments 23) Embroidery Machines 24) Packaging Machines
Description : List different types of stepper motor. State one application of stepper motor.
Last Answer : Types of stepper motor : (i)Variable - reluctance motor (ii) Permanent- magnet motors (iii) Hybrid motors. Applications of stepper motor : In robotics, In CNC machines, In computers, printers, ... In Watches, In biomedical applications such as X-ray machines, CT scan, In Process control systems.
Description : applications of each: i) Universal motor ii) Stepper motor.
Last Answer : i) Applications of Universal motor: 1) portable drills 2) hair dryers 3) grinders 4) mixers 5) table-fans 6) blowers 7) polishers 8) Kitchen appliances ii) Applications of Stepper motor ... 7) robotics 8) CNC machine 9) Control systems 10) Biomedical applications 10) XY recorder 11) plotters