What in a DC motor reverses the polarity and current each half-cycle? A) solid ring commutator...
What in a DC motor reverses the polarity and current each half-cycle? A) solid ring commutator B) fuse C) a CRT D) a split ring commutator
Homework Answers
A split - ring commutator (sometimes just called a commutator)
is a simple and clever device for reversing the current
direction
through an armature every half turn.
Hence the correct option is (d)
Add Answer to:
What in a DC motor reverses the polarity and current each
half-cycle? A) solid ring commutator...
A device used in DC generators to reverse the connection of the output at each half-cycle...
A device used in DC generators to reverse the connection of the output at each half-cycle point a. Brush b. Commutator. c. Slip Rings. d. Reverser
At t=0 the current to a dc electric motor is reversed, resulting in an angular displacement...
At t=0 the current to a dc electric motor is reversed, resulting in an angular displacement of the motor shaft given by θ(t)=( 244 rad/s )t−( 20.1 rad/ s 2 ) t 2 −( 1.46 rad/ s 3 ) t 3 . Part A At what time is the angular velocity of the motor shaft zero? Part B Calculate the angular acceleration at the instant that the motor shaft has zero angular velocity. Part C How many revolutions does the...
1. We are given a DC-DC converter as shown below. If the duty cycle is the...
1. We are given a DC-DC converter as shown below. If the duty
cycle is the fraction of each period that the switch is closed:
Please answer parts a & b with detail. This problem will
help me study for my upcoming exam.
1. We are given a DC-DC converter as shown below. If the duty cycle is the fraction of each period that the switch is closed: a. Give the function that describes in terms of duty cycle. What...
answere Please mark only one of the four choices Q1. Controlling the speed of a DC motor by using a micro-controller, is what type of control? b. Digital C. Analog d. All of the above Q2. When cur...
answere
Please mark only one of the four choices Q1. Controlling the speed of a DC motor by using a micro-controller, is what type of control? b. Digital C. Analog d. All of the above Q2. When current flow is interrupted in a DC motor, which motor property causes a reverse voltage spike? a. Resistance b. Capacitance C. Inductance d. None of the above Q3. Which Arduino internal circuit is used to control motor speed? a. Digital to Analog Converter...
In a shunt-wound dc motor with the field coils and rotor connected in parallel (see the...
In a shunt-wound dc motor with the field coils and rotor
connected in parallel (see the figure (Figure 1)), the resistance
Rf of the field coils is Rf = 103 Ω and the resistance Rr of the
rotor is Rr = 5.5 Ω. When a potential difference of V = 120 V is
applied to the brushes and the motor is running at full speed
delivering mechanical power, the current supplied to it is 4.90
A.
Part A.) What is...
3) The armature of a permanent-magnet dc motor has a resistance of 0.72 and draws a...
3) The armature of a permanent-magnet dc motor has a resistance of 0.72 and draws a current of 50 A when the speed is 1500 r/min when the armature is connected to a source of 48 V, calculate the following: a) The induced emf, EA, and the torque, T, produced at this speed. b) The motor speed, n (in rpm), when the torque is 2 Nm. c) The armature current at 1600 r/min. d) The torque at 1600 r/min. e)...
Questions 13-15: At t=0 the current to a dc electric motor is reversed, resulting in an...
Questions 13-15: At t=0 the current to a dc electric motor is reversed, resulting in an angular displacement of the motor shaft given by e(t) = (27 rad/s)t - (1 rad/s°) (10 points) 13) At what time is the angular velocity of the motor shaft zero? 14) Calculate the angular acceleration at the instant that the motor shaft has zero angular velocity. 15) The radius of the shaft is 0.1m. Calculate the linear speed of the shaft at t=1s and...
Briefly explain how the diodes(D, and D2) conduct the current in each half-cycle of the input...
Briefly explain how the diodes(D, and D2) conduct the current in each half-cycle of the input Vin. Sketch the output voltage Vout (on the same scale as Vin) if voi = VD2 = 0.7 V(on conducting). D + Vin +V01- + VO out +V02 D2 Vin (V) 6 t(ms) 10 20 30 40 -6
a) Explain the working of the given full wave rectifier in positive and negative half cycle....
a) Explain the working of the given full wave rectifier in positive and negative half cycle. (1 Mark) 50:10 D1 K Vp(RMS)-110 V OV a 00000 elle IH D2 b) Draw the input and output waveform of the given Full wave rectifier assuming D1 and D2 are germanium diodes. (2 Marks) c) Find DC load Voltage. (1 Mark) d) Find the DC load current if load resistance is 50012. (1 Mark) e) Find Vr(RMS). (1 Mark) f) Find ripple factor....
a single pdf file. Armature - Controlled DC Motor Representative Differential Equations di Ly da Ti...
a single pdf file. Armature - Controlled DC Motor Representative Differential Equations di Ly da Ti Where the armature voltage (%) is the input, and the armature current (a) and the motor speed (w) are the outputs. Armature circuit 4(0)-0 A a,(0) = 20π rad PART 1 -State Variables A. Make a list of all of the time-dependent output variables: B. What is the highest order derivative present for each of the output variables? C. List all of the lower...
A device used in DC generators to reverse the connection of the output at each half-cycle point a. Brush b. Commutator. c. Slip Rings. d. Reverser
1. We are given a DC-DC converter as shown below. If the duty
cycle is the fraction of each period that the switch is closed:
Please answer parts a & b with detail. This problem will
help me study for my upcoming exam.
1. We are given a DC-DC converter as shown below. If the duty cycle is the fraction of each period that the switch is closed: a. Give the function that describes in terms of duty cycle. What...
answere
Please mark only one of the four choices Q1. Controlling the speed of a DC motor by using a micro-controller, is what type of control? b. Digital C. Analog d. All of the above Q2. When current flow is interrupted in a DC motor, which motor property causes a reverse voltage spike? a. Resistance b. Capacitance C. Inductance d. None of the above Q3. Which Arduino internal circuit is used to control motor speed? a. Digital to Analog Converter...
In a shunt-wound dc motor with the field coils and rotor
connected in parallel (see the figure (Figure 1)), the resistance
Rf of the field coils is Rf = 103 Ω and the resistance Rr of the
rotor is Rr = 5.5 Ω. When a potential difference of V = 120 V is
applied to the brushes and the motor is running at full speed
delivering mechanical power, the current supplied to it is 4.90
A.
Part A.) What is...
3) The armature of a permanent-magnet dc motor has a resistance of 0.72 and draws a current of 50 A when the speed is 1500 r/min when the armature is connected to a source of 48 V, calculate the following: a) The induced emf, EA, and the torque, T, produced at this speed. b) The motor speed, n (in rpm), when the torque is 2 Nm. c) The armature current at 1600 r/min. d) The torque at 1600 r/min. e)...
Questions 13-15: At t=0 the current to a dc electric motor is reversed, resulting in an angular displacement of the motor shaft given by e(t) = (27 rad/s)t - (1 rad/s°) (10 points) 13) At what time is the angular velocity of the motor shaft zero? 14) Calculate the angular acceleration at the instant that the motor shaft has zero angular velocity. 15) The radius of the shaft is 0.1m. Calculate the linear speed of the shaft at t=1s and...
Briefly explain how the diodes(D, and D2) conduct the current in each half-cycle of the input Vin. Sketch the output voltage Vout (on the same scale as Vin) if voi = VD2 = 0.7 V(on conducting). D + Vin +V01- + VO out +V02 D2 Vin (V) 6 t(ms) 10 20 30 40 -6
a) Explain the working of the given full wave rectifier in positive and negative half cycle. (1 Mark) 50:10 D1 K Vp(RMS)-110 V OV a 00000 elle IH D2 b) Draw the input and output waveform of the given Full wave rectifier assuming D1 and D2 are germanium diodes. (2 Marks) c) Find DC load Voltage. (1 Mark) d) Find the DC load current if load resistance is 50012. (1 Mark) e) Find Vr(RMS). (1 Mark) f) Find ripple factor....
a single pdf file. Armature - Controlled DC Motor Representative Differential Equations di Ly da Ti Where the armature voltage (%) is the input, and the armature current (a) and the motor speed (w) are the outputs. Armature circuit 4(0)-0 A a,(0) = 20π rad PART 1 -State Variables A. Make a list of all of the time-dependent output variables: B. What is the highest order derivative present for each of the output variables? C. List all of the lower...
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