A single-phase full wave controlled rectifier is used to control the speed of a separately excited DC motor rated at 200 V and 2000 rpm. The converter is connected to a single-phase 230 V, 50 Hz supply. The amature resistance is 50 ma, the motor voltage constant is 0.0975 Virpm, and the no- load current is 10 A. Assume that the motor curent is continuous and ripple free, (a) Draw the drive circuit. (b) Calculate the motor rated current. (e) Calkulate the motor rated torque and power. (d) Calculate the no load speed when the firing angle is 60. (e) Calculate the firing angle to obtain the rated speed of 2000 rpm at rated motor current.
A single-phase full wave controlled rectifier is used to control the speed of a separately excited DC motor rated at 200 V and 2000 rpm. The converter is connected to a single-phase 230 V, 50 Hz supply. The amature resistance is 50 ma, the motor voltage constant is 0.0975 Virpm, and the no- load current is 10 A. Assume that the motor curent is continuous and ripple free, (a) Draw the drive circuit. (b) Calculate the motor rated current. (e) Calkulate the motor rated torque and power. (d) Calculate the no load speed when the firing angle is 60. (e) Calculate the firing angle to obtain the rated speed of 2000 rpm at rated motor current.
Introductory Circuit Analysis (13th Edition)
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ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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Transcribed Image Text:A single-phase full wave controlled rectifier is used to control the speed of a separately excited DC
motor rated at 200 V and 2000 rpm. The converter is connected to a single-phase 230 V, 50 Hz
supply. The amature resistance is 50 m2, the motor voltage constant is 0.0975 V/rpm, and the no-
load current is 10 A. Assume that the motor current is continuous and ripple free,
(a) Draw the drive circuit.
(b) Calculate the motor rated current,
(c) Calculate the motor rated torque and power.
(d) Calculate the no load speed when the firing angle is 60".
(e) Calculate the firing angle to obtain the rated speed of 2000 rpm at rated motor current.
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