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32 The following information is given on the brushes used in the motor of Problem 31: number of brushes: 2 current per brush: 15 A brush dimensions: 5/8 in wide, 5/16 in thick, 3/4 in long. (The 5/16 in × 5/8 in area is in contact with the commutator.) resistivity of brush: 0.0016 N| | brush pressure: 1.5 Ibf brush contact drop: 1.2 V coefficient of friction: 0.2 Calculate the following: a. The resistance of the brush body in ohms b. The voltage drop in the brush body c. The total voltage drop in one brush, including the contact voltage drop d. The total electrical power loss (in watts) due to the two brushes e. The frictional force of one brush rubbing against the commutator surface (in Ibf and in newtons) f. The frictional energy expended by the two brushes when the commutator makes one revolution (in joules) g. The power loss due to friction, given the speed of 3000 r/min h. The total brush loss as a percent of the 1.5 hp motor rating

32 The following information is given on the brushes used in the motor of Problem 31: number of brushes: 2 current per brush: 15 A brush dimensions: 5/8 in wide, 5/16 in thick, 3/4 in long. (The 5/16 in × 5/8 in area is in contact with the commutator.) resistivity of brush: 0.0016 N| | brush pressure: 1.5 Ibf brush contact drop: 1.2 V coefficient of friction: 0.2 Calculate the following: a. The resistance of the brush body in ohms b. The voltage drop in the brush body c. The total voltage drop in one brush, including the contact voltage drop d. The total electrical power loss (in watts) due to the two brushes e. The frictional force of one brush rubbing against the commutator surface (in Ibf and in newtons) f. The frictional energy expended by the two brushes when the commutator makes one revolution (in joules) g. The power loss due to friction, given the speed of 3000 r/min h. The total brush loss as a percent of the 1.5 hp motor rating

College Physics
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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Please help with 32 31 The commutator of a 1.5 hp, 2-pole, 3000 r/min de motor has a diameter of 63 mm. Calculate the peripheral speed in feet per minute and in miles per hour. 32 The following information is given on the brushes used in the motor of Problem 31: number of brushes: 2 current per brush: 15 A brush dimensions: 5/8 in wide, 5/16 in thick, 3/4 in long. (The 5/16 in × 5/8 in area is in contact with the commutator.) resistivity of brush: 0.0016 Q brush pressure: 1.5 Ibf brush contact drop: 1.2 V coefficient of friction: 0.2 Calculate the following: a. The resistance of the brush body in ohms b. The voltage drop in the brush body c. The total voltage drop in one brush, including the contact voltage drop d. The total electrical power loss (in watts) due to the two brushes e. The frictional force of one brush rubbing against the commutator surface (in Ibf and in newtons) f. The frictional energy expended by the two brushes when the commutator makes one revolution (in joules) g. The power loss due to friction, given the speed of 3000 r/min h. The total brush loss as a percent of the 1.5 hp motor rating
Transcribed Image Text:Please help with 32 31 The commutator of a 1.5 hp, 2-pole, 3000 r/min de motor has a diameter of 63 mm. Calculate the peripheral speed in feet per minute and in miles per hour. 32 The following information is given on the brushes used in the motor of Problem 31: number of brushes: 2 current per brush: 15 A brush dimensions: 5/8 in wide, 5/16 in thick, 3/4 in long. (The 5/16 in × 5/8 in area is in contact with the commutator.) resistivity of brush: 0.0016 Q brush pressure: 1.5 Ibf brush contact drop: 1.2 V coefficient of friction: 0.2 Calculate the following: a. The resistance of the brush body in ohms b. The voltage drop in the brush body c. The total voltage drop in one brush, including the contact voltage drop d. The total electrical power loss (in watts) due to the two brushes e. The frictional force of one brush rubbing against the commutator surface (in Ibf and in newtons) f. The frictional energy expended by the two brushes when the commutator makes one revolution (in joules) g. The power loss due to friction, given the speed of 3000 r/min h. The total brush loss as a percent of the 1.5 hp motor rating
Expert Solution
Step 1

 Given no of brushes =2 current per brush =15A

 Resistivity of brush =0.0016ohm

 Brush pressure =1.5lbf

Brush constant drop=0.2

We have to find the following option's answer

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