- October 3, 2017
- Posted by: maxpower
- Category: Uncategorized
Understanding the difference
BRUSH DC MOTORS
Glossary of terms:
- Commutator:
Transfers the electric current through the brush assembly to the armature.
- Brushes:
Ride on the commutator and sends electric current to the armature.
- Armature:
The rotating part of a brush DC motor that contains the wire windings.
Brushed Motors have been the most used DC technology over last 100 years.
BRUSHLESS DC MOTORS
Glossary of terms:
- Stator:
The outer, non-rotating structure that contains the windings
- Rotor:
The rotating part of a brushless DC motor which contains fixed magnets
The DC motor was invented in 1880 by Werner von Siemens
From 2003 to 2010, the brushless Dc motor market grew from $300million to over $1.3billion, partly due to the rise in technologies that use the motors such as robotics and packaging
KEY DIFFERENCES
| Brushless DC (BLDC)Motors | Brush DC Motors |
| Use an Electronic System to control current | Need a mechanical system to control current |
| Convert electrical power into mechanical power more efficiently | Simple design/simple construction |
| Less friction = Less heat loss | Simple design = Easy control |
| No rubbing or wearing parts = Longer life | Brushes wear out creating noise |
| Greater mean time between maintenance | Shorter mean time between failures |
| Higher torque-to-size ratio |
Brushless And Brush Motors functionally are explained by Faraday’s law of induction (1831). This predicts how magnetic fields react to electronic current.