Issue link: https://read.dmtmag.com/i/384751
Rotor Construct the permanent magnet on the rotor Construct the windings on the stator Electric controller is required to keep the motor running Use for high torque application Higher speed range- no mechanical limitation imposed by brushes/ commutator Lower speed range due to mechani- cal limitation on the brushes Typical life expectancy 10,000 to 20,000 hours Higher efficiency up to 90%. No voltage drop across brushes Electronic commutation based on Hall position sensors. The commutation requires a driver/controller Require little to no maintenance due to absence of brushes Superior thermal characteristics results in better heat dissipation due to the windings on the stator Low electric noise generation Higher the cost of construction, normally double the cost than the brushed DC motor Fuel controls, missile fin actuators dental tools, respirators, R/C model airplanes, pumps, robotics, electric and hybrid vehicles, medical equipment, lawn mowers, factory automation, and gate operators. Printers, toys, semiconductors equipments, packaging machines, automotive motors, wheelchairs, medical equipment, electric toothbrushes, vacuum cleaners, hair dryers, drill screwdrivers and gate operators. Lower cost of construction Brush arcing will generate noise causing EMI. Brushes emit audible noise during rotation Poor heat dissipation due to internal rotor construction Periodic maintenance is required. You need to replace brushes to extend the life of the motor Use mechanical commutator to reverse the polarity of the armature electromagnet Typically efficiency is about 60% to 70% Typical life expectancy is 2,000 to 5,000 hours depending on the appli- cation and duty cycle Construct the windings on the rotor/armature Construct the permanent magnet on the stator No controller is required for fix speeds Use for low torque apllication Stator Controller Torque Speed Life Efficiency Commutation Method Maintenance Heat Dissipation Noise Cost Applications Brushless DC Brushed DC CONSTRUCTION FEATURE / PERFORMANCE BENEFITS / COMPARISON Brushless DC VS Brushed DC Motor PLATINUM ACCESS SYSTEMS TM