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A DC motor has an armature resistance of 0,4 Ω, and KΦ = 2,8 Vs/rad. The motor is driven by an SCR full wave AC/DC converter. The input to the converter is AC source of 270 V. The motor is used as a prime mover of a forklift. In the upward direction, the mechanical load is 100 Nm, and the triggering angle of the converter is 25o . In the downward direction, the load torque is 180 Nm. Calculate the triggering angle required to keep the downward speed equal to the upward speed in magnitude. Assume that the motor current is always continuous.

A DC motor has an armature resistance of 0,4 Ω, and KΦ = 2,8 Vs/rad. The motor is driven by an SCR full wave AC/DC converter. The input to the converter is AC source of 270 V. The motor is used as a prime mover of a forklift. In the upward direction, the mechanical load is 100 Nm, and the triggering angle of the converter is 25o . In the downward direction, the load torque is 180 Nm. Calculate the triggering angle required to keep the downward speed equal to the upward speed in magnitude. Assume that the motor current is always continuous.

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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A DC motor has an armature resistance of 0,4 Ω, and KΦ = 2,8 Vs/rad. The motor is driven by an SCR full wave
AC/DC converter. The input to the converter is AC source of 270 V. The motor is used as a prime mover of a
forklift. In the upward direction, the mechanical load is 100 Nm, and the triggering angle of the converter is 25o
. In
the downward direction, the load torque is 180 Nm. Calculate the triggering angle required to keep the downward
speed equal to the upward speed in magnitude. Assume that the motor current is always continuous.

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