Homework Answers
10)
A) Pneumatic Actuators
These are the devices which converts energy in the form of compressed air or a gas into linear or rotary motion depending on the type of actuator.
B) Permanent Magnet DC motor also called PMDC motor
It is a motor which has a permanent magnet pole. The following figure shows a PMDC motor
The figure (a) is a 2-pole
motor and figure (b) is a 4-pole motor
The principle of operation is same as that of normal working DC motor which is, When a current carrying conductor is placed in a magnetic field, it experiences a mechanical force. In PMDC, the armature is placed inside the magnetic field of a permanent magnet. When a force is generated the armature rotates in its direction. Armature consists of many conductors and the cumulation of the experienced force produces a Torque.
Equivalent circuit diagram
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(10 pts) Answer the following: a) (3 pts) What are pneumatic actuators? fb) (7 pts) How...
Thank You and thumps up. at 1459 rev/min (100 Pts) A 208V, WYE-Connected, 4 Pole, 50...
Thank You and thumps up.
at 1459 rev/min (100 Pts) A 208V, WYE-Connected, 4 Pole, 50 Hz Induction Motor is turning and is drawing line current of 12.60 A at 28.56° lagging from the grid. The rotational losses for 7. this motor are known to be 325 W. Modeling characteristics of the motor are given below XM-242n R10.5542 x,_ 1.0500 | R,-0.225Ω X,-0.5710 (10 Pts) How much power is the grid providing to this motor? a. Answer: b. (10 Pts)...
A 3 phase Y connected AC motor operates on 460V, line voltage, and draws 10.0 amps,...
A 3 phase Y connected AC motor operates on 460V, line voltage, and draws 10.0 amps, line current. If the motor produces 10.0 hp at 3500 RPM, answer the following: a. What is the motor efficiency? b. How much power is lost to heat? c. What is the running torque of the motor?
3. (10 pts) What does the following statement represent? pH=- log (1.2 M) 4. (10 pts)...
3. (10 pts) What does the following statement represent? pH=- log (1.2 M) 4. (10 pts) How does the pH probe determine the pH of a 6.0M solution of HNO,?
7. (4+6=10 pts) State Biot-Savart law and Ampere's law. Now use Ampere's law to answer following:...
7. (4+6=10 pts) State Biot-Savart law and Ampere's law. Now use Ampere's law to answer following: A long, cylindrical wire (radius = 2.0 cm) carries a current of 40 A that is uniformly distributed (uniform current density) over a cross section of the wire. What is the magnitude of the magnetic field at a point which is 1.5 cm from the axis of the wire?
Number 10 10. (12 pts) In the following molecules. tell how many peaks are in the...
Number 10
10. (12 pts) In the following molecules. tell how many peaks are in the signal for the indicated protons. 7 니 11. (50 pts) For the following chemical reactions, give the major organic produces. Br 25 °C CH3CN
URGENT 0 words Question 7 10 pts What do you mean by Eutrophication and how does...
URGENT
0 words Question 7 10 pts What do you mean by Eutrophication and how does it affect the aquatic community? HTML Editora BIVA-A- IE 3
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,...
how do we calculate ii and iii) - induction motor (25 marks) QUESTION 3 A three-phase,...
how do we calculate ii and iii) - induction motor
(25 marks) QUESTION 3 A three-phase, 400 V, 50 Hz, 4-pole, 1370 rpm, star connected, squirrei-cage induction motor has the following parameters: R, 20, R2- 3 Q, X1-X2- 3.5 and Xm=40 .Motor is controlled by a voltage source inverter at constant V/f ratio. By using IEEE equivalent circuit; Calculate the starting torque and starting current at 10 Hz To- If the torque-speed to be a straight line calculate the slip...
7. (10 pts pt.) A 20 turn rectangular coil with sides of length in 30 cm...
7. (10 pts pt.) A 20 turn rectangular coil with sides of length in 30 cm and width w 10 cm is placed in plane as shown in Figure below a. If the coil, which carries a current i = 10 A is in the presence of a magnetic flux density B = 2x10 (+92) (Tesla) Determine the torque acting on the coil. b. At what angle is the torque zero? c. At what angle is the torque maximum? Determine...
Problem 2 (10 points): A 3-phase, 208-V (H), six-pole Y-connected, 25-hp, design class B (X,-15%)...
Problem 2 (10 points): A 3-phase, 208-V (H), six-pole Y-connected, 25-hp, design class B (X,-15%) induction motor is tested in the laboratory, with the following results: DC test: 13.5 V, 64 A No load: 208 V, 24.0 A, 1400 W, 60 Hz Locked rotor: 24.6 V, 64.5 A, 2200 W, 15 Hz Neglecting the core losses (a) Find the equivalent circuit parameters of this motor and show them on the equivalent circuit. (b) What is the rotational losses of this...
Thank You and thumps up.
at 1459 rev/min (100 Pts) A 208V, WYE-Connected, 4 Pole, 50 Hz Induction Motor is turning and is drawing line current of 12.60 A at 28.56° lagging from the grid. The rotational losses for 7. this motor are known to be 325 W. Modeling characteristics of the motor are given below XM-242n R10.5542 x,_ 1.0500 | R,-0.225Ω X,-0.5710 (10 Pts) How much power is the grid providing to this motor? a. Answer: b. (10 Pts)...
3. (10 pts) What does the following statement represent? pH=- log (1.2 M) 4. (10 pts) How does the pH probe determine the pH of a 6.0M solution of HNO,?
7. (4+6=10 pts) State Biot-Savart law and Ampere's law. Now use Ampere's law to answer following: A long, cylindrical wire (radius = 2.0 cm) carries a current of 40 A that is uniformly distributed (uniform current density) over a cross section of the wire. What is the magnitude of the magnetic field at a point which is 1.5 cm from the axis of the wire?
Number 10
10. (12 pts) In the following molecules. tell how many peaks are in the signal for the indicated protons. 7 니 11. (50 pts) For the following chemical reactions, give the major organic produces. Br 25 °C CH3CN
URGENT
0 words Question 7 10 pts What do you mean by Eutrophication and how does it affect the aquatic community? HTML Editora BIVA-A- IE 3
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,...
how do we calculate ii and iii) - induction motor
(25 marks) QUESTION 3 A three-phase, 400 V, 50 Hz, 4-pole, 1370 rpm, star connected, squirrei-cage induction motor has the following parameters: R, 20, R2- 3 Q, X1-X2- 3.5 and Xm=40 .Motor is controlled by a voltage source inverter at constant V/f ratio. By using IEEE equivalent circuit; Calculate the starting torque and starting current at 10 Hz To- If the torque-speed to be a straight line calculate the slip...
7. (10 pts pt.) A 20 turn rectangular coil with sides of length in 30 cm and width w 10 cm is placed in plane as shown in Figure below a. If the coil, which carries a current i = 10 A is in the presence of a magnetic flux density B = 2x10 (+92) (Tesla) Determine the torque acting on the coil. b. At what angle is the torque zero? c. At what angle is the torque maximum? Determine...
Problem 2 (10 points): A 3-phase, 208-V (H), six-pole Y-connected, 25-hp, design class B (X,-15%) induction motor is tested in the laboratory, with the following results: DC test: 13.5 V, 64 A No load: 208 V, 24.0 A, 1400 W, 60 Hz Locked rotor: 24.6 V, 64.5 A, 2200 W, 15 Hz Neglecting the core losses (a) Find the equivalent circuit parameters of this motor and show them on the equivalent circuit. (b) What is the rotational losses of this...
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