Here is DC Motor working principle; types of DC Motor - Brushed, Brushless, DC Servo Motor; DC Motor driving using H bridge and L293D motor drivers, etc.
Brushless motors Powerful with long service life
Motor Selection Guide - Phidgets Support
Servo Drives for Brushed DC Motors - INGENIA
Introduction of brushless motor, brush motor, servo motor, stepper motor, reduce - Technical Knowledge - Integrated servo motor Integrated Closed loop stepper motor
Which type of motor is better for disposable surgical power tools? - Medical Design and Outsourcing
Brushless Vs Brushed DC Motors: When and Why to Choose One Over the Other, Article
What are Brushless DC Motors
Brushless motors - Compotech
Are brushed motors suitable for industrial applications?