A PWM signal is sent to a permanent magnet DC motor through an H-bridge circuit. The PWM frequency is 100 kHz, the DC voltage source is 16 volts, and the specification of the motor is given as: voltage = 16 volts, no load speed = 1500 RPM, holding torque = 2 Nm. a. Draw the voltage signal delivered to the motor when the duty cycle is 20% and 80% (at least draw for 5 periods). Calculate the speed of DC motor when the duty cycle is 20% and 80%. Estimate the output power when the duty cycle is 20% and 80%. Assume that the motor efficiency is 100%. b. C.

A PWM signal is sent to a permanent magnet DC motor through an H-bridge circuit. The PWM frequency is 100 kHz, the DC voltage source is 16 volts, and the specification of the motor is given as: voltage = 16 volts, no load speed = 1500 RPM, holding torque = 2 Nm. a. Draw the voltage signal delivered to the motor when the duty cycle is 20% and 80% (at least draw for 5 periods). Calculate the speed of DC motor when the duty cycle is 20% and 80%. Estimate the output power when the duty cycle is 20% and 80%. Assume that the motor efficiency is 100%. b. C.

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

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Concept explainers

DC Series Motors

A DC motor is a type of electric motor which converts electric energy into mechanical energy. The forces that are produced by the magnetic field are what those common types of motors rely upon. Either electro-mechanical or electronic, all types of DC motors have some internal mechanism to change the current direction in part of the DC motors. As the DC motors could be powered from existing DC lighting power distribution systems, these motors were the first form of motors widely used. By changing the strength of the current in its field winding or by using a variable supply voltage, the speed of the DC motors can be controlled over a wide range.

Question

A PWM signal is sent to a permanent magnet DC motor through an H-bridge circuit. The
PWM frequency is 100 kHz, the DC voltage source is 16 volts, and the specification of
the motor is given as: voltage = 16 volts, no load speed = 1500 RPM, holding torque = 2
Nm.
a.
Draw the voltage signal delivered to the motor when the duty cycle is 20% and
80% (at least draw for 5 periods).
Calculate the speed of DC motor when the duty cycle is 20% and 80%.
b.
C.
Estimate the output power when the duty cycle is 20% and 80%. Assume that
the motor efficiency is 100%.

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