EBK ELECTRICAL TRANSFORMERS AND ROTATIN
4th Edition
ISBN: 9781337025867
Author: Herman
Publisher: VST
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Question
Chapter 21, Problem 1RQ
To determine
The full load running current of DC motor.
Expert Solution & Answer
Explanation of Solution
Given:
The power of the motor
The voltage applied to the motor
Calculation:
Refer to the Table
The full load running current of DC motor with a power of
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Students have asked these similar questions
A (21 HP, 3-Phase, 380 volts) motor with an efficiency of 95% is operating at a load
factor of 0.63. What is the input current (Amperes) when the power factor is 89%? (1
HP = 0.75 kW)
In a given DC motor, the output power is 20 HP, and the copper losses are 1.1 KW. If the motor is operating at 87 % efficiency, find the converted power and the rotational losses. Select one:
a. Pconv = 16.05 KW and Prot = 1.13 KW
b. Pconv = 17.15 KW and Prot = 3.11 KW
c. Pconv = 14.92 KW and Prot = 1.35 KW
d. None
What is the minimum pulley diameter for a 1 HP motor running at 1750 RPM?
Chapter 21 Solutions
EBK ELECTRICAL TRANSFORMERS AND ROTATIN
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- A motor develops 189 ft-lb of torque at 1745 RPM. What is the horse-power output of the motor?arrow_forwardA current transformer has 4 turns of wire in its primary winding. How many turns of wire are needed in the secondary winding to produce a current of 2 amperes when a current of 60 amperes flows in the primary winding?arrow_forwardQuestion 2 Beli vifth Slack side Motor (imprut) Tight side Beli thickpess\ Centre distance Figure 2 Figure 2 shows an open flat belt drive connected to a motor and a pulley. The motor transmits 20 kw to the connect pulley of 450 mm diameter and is rotating at 850 r/min to a second pulley rotating at 400 r/min. The distance between pulley centres is approximately 2 m. The belt is 6 mm thick and has a density of 970 kg/m. The maximum stress in the belt is not to exceed 2,7 MPa. The coefficient of friction for both pulleys is 0,3. Determine: 2.1. The diameter of the second pulley. 2.2. The length of the belt. 3.3. The width of the belt taking centrifugal tension into account.arrow_forward
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