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Typical operating curves for a DC motor are shown in the figure below. Effect a linear...
A 12-pole, brushless, DC motor has a no-load speed of 5000rpm and a stall torque of 50 in-oz when operating at rated voltage of 60V. Testing shows that no-load speed and stall torque vary linearly wi...
A 12-pole, brushless, DC motor has a no-load speed of 5000rpm and a stall torque of 50 in-oz when operating at rated voltage of 60V. Testing shows that no-load speed and stall torque vary linearly with applied voltage. Also, with a constant applied voltage the speed decreases linearly as delivered torque increases. Calculate the following: Torque that the motor delivers at 2000 rpm when operated at rated voltage. T a) b) Fundamental frequency of the applied voltage waveform at this...
Question 3: DC motors can be simplistically modeled as shown in Figure 5 MoTor back emf Vi: +1 Re...
Question 3: DC motors can be simplistically modeled as shown in Figure 5 MoTor back emf Vi: +1 Resistor Ra Ia Figure 5: Simplified model of DC Motor (a) Write the three characteristic equations that determine the behavior of the DC motor. Denote torque constant and speed constant as Ka, K, respectively. (b) Motor parameters are the quantities that define the behavior of the motor. List the motor parameters from the described model. What are their units? (c) For given...
need the answer for the question no. 1 ENGR 113 Homework DC Motor Objectives Plot the...
need the answer for the question no. 1
ENGR 113 Homework DC Motor Objectives Plot the Torque-Speed curve for a given DC motor given the stall torque and no load speed values Calculate the rotational power for a DC motor given the stall torque and no load speed values Plot the rotational power on a Torque-Speed curve to see the relationship between torque, speed, and power Calculate the maximum efficiency of a DC motor. Calculate the operating point for a...
If a manufacturer's specifications for a PM DC motor are as follows, what are the motor's...
If a manufacturer's specifications for a PM DC motor are as follows, what are the motor's no-load speed, stall current, starting torque, and maximum power for an applied voltage of 10 V? ■ Torque constant 0.12 Nm/A Electrical constant 12 V/1000 RPM Armature resistance-: 1.5 Ω
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)...
Question 1 0/10 pts A permanent magnet dc motor is to be started from rest. This...
Question 1 0/10 pts A permanent magnet dc motor is to be started from rest. This motor is driving a load of inertia J = 0.045 kg-m2, and a load torque of T = 2.1 Nm. The motor current must not exceed 15A First, find the expression of voltage va as functions of time which must be applied to bring this motor to a steady state speed of 300 rad/s as quickly as possible. Then, at time t= 1.4 seconds,...
P4-17) A 240 V separately exited dc motor has an armature resistance of Ra = 006...
P4-17) A 240 V separately exited dc motor has an armature resistance of Ra = 006 Ω, when it is connected to a 240 V supply, it draws 90 A from the supply and rotates at 1200 rpm. Find the torque developed by the motor at this operating condition. If the torque developed is 280 Nm for the same excitation and same supply voltage, then find the speed and armature current. a) b)
A certain dc motor has R,-1.5Ω, 1,-10A, and produces a back emf EA-300V. while operating at...
A certain dc motor has R,-1.5Ω, 1,-10A, and produces a back emf EA-300V. while operating at a speed of 1500rpm. Determine the voltage applied to the armature, the developed torque, and the developed power 104 e ge applied to the an
A 220 V DC shunt motor has an armature resistance, Re-0.1 S2, a field resistance, Ry=100...
A 220 V DC shunt motor has an armature resistance, Re-0.1 S2, a field resistance, Ry=100 12, and negligible rotational losses. Under certain load conditions, the shunt motor runs at 1600 rpm while drawing a total current, I = 100 A. Determine: a. the output power of the motor; b. the output torque in N-m; and, c. the efficiency Without making any changes to the applied voltage or the field, the motor operates with a new M mechanical load that...
3) A saperately excited DC motor has the following parameters: Ra = 10 Ke = 0.4...
3) A saperately excited DC motor has the following parameters: Ra = 10 Ke = 0.4 V/rpm. Wb 0 = 0.2 Wb The motor speed is controlled by a full-wave bridge rectifier. The firing angle is set at 45°, and the average speed is 1500 rpm. The applied AC voltage to the input of the bridge rectifier is 220Vrms - 50 Hz. a) (10p) Please draw the complete circuit. (converter + motor) b) (10p) Please find the armature current. c)...
A 12-pole, brushless, DC motor has a no-load speed of 5000rpm and a stall torque of 50 in-oz when operating at rated voltage of 60V. Testing shows that no-load speed and stall torque vary linearly with applied voltage. Also, with a constant applied voltage the speed decreases linearly as delivered torque increases. Calculate the following: Torque that the motor delivers at 2000 rpm when operated at rated voltage. T a) b) Fundamental frequency of the applied voltage waveform at this...
Question 3: DC motors can be simplistically modeled as shown in Figure 5 MoTor back emf Vi: +1 Resistor Ra Ia Figure 5: Simplified model of DC Motor (a) Write the three characteristic equations that determine the behavior of the DC motor. Denote torque constant and speed constant as Ka, K, respectively. (b) Motor parameters are the quantities that define the behavior of the motor. List the motor parameters from the described model. What are their units? (c) For given...
need the answer for the question no. 1
ENGR 113 Homework DC Motor Objectives Plot the Torque-Speed curve for a given DC motor given the stall torque and no load speed values Calculate the rotational power for a DC motor given the stall torque and no load speed values Plot the rotational power on a Torque-Speed curve to see the relationship between torque, speed, and power Calculate the maximum efficiency of a DC motor. Calculate the operating point for a...
If a manufacturer's specifications for a PM DC motor are as follows, what are the motor's no-load speed, stall current, starting torque, and maximum power for an applied voltage of 10 V? ■ Torque constant 0.12 Nm/A Electrical constant 12 V/1000 RPM Armature resistance-: 1.5 Ω
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)...
Question 1 0/10 pts A permanent magnet dc motor is to be started from rest. This motor is driving a load of inertia J = 0.045 kg-m2, and a load torque of T = 2.1 Nm. The motor current must not exceed 15A First, find the expression of voltage va as functions of time which must be applied to bring this motor to a steady state speed of 300 rad/s as quickly as possible. Then, at time t= 1.4 seconds,...
P4-17) A 240 V separately exited dc motor has an armature resistance of Ra = 006 Ω, when it is connected to a 240 V supply, it draws 90 A from the supply and rotates at 1200 rpm. Find the torque developed by the motor at this operating condition. If the torque developed is 280 Nm for the same excitation and same supply voltage, then find the speed and armature current. a) b)
A certain dc motor has R,-1.5Ω, 1,-10A, and produces a back emf EA-300V. while operating at a speed of 1500rpm. Determine the voltage applied to the armature, the developed torque, and the developed power 104 e ge applied to the an
A 220 V DC shunt motor has an armature resistance, Re-0.1 S2, a field resistance, Ry=100 12, and negligible rotational losses. Under certain load conditions, the shunt motor runs at 1600 rpm while drawing a total current, I = 100 A. Determine: a. the output power of the motor; b. the output torque in N-m; and, c. the efficiency Without making any changes to the applied voltage or the field, the motor operates with a new M mechanical load that...
3) A saperately excited DC motor has the following parameters: Ra = 10 Ke = 0.4 V/rpm. Wb 0 = 0.2 Wb The motor speed is controlled by a full-wave bridge rectifier. The firing angle is set at 45°, and the average speed is 1500 rpm. The applied AC voltage to the input of the bridge rectifier is 220Vrms - 50 Hz. a) (10p) Please draw the complete circuit. (converter + motor) b) (10p) Please find the armature current. c)...
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