![]() ![]() By contrast, a brushed motor will always run as fast as it can while in use. If the tool then starts putting 3-inch screws into mahogany, it will adjust accordingly and draw more current. For example, if you're using a brushless drill to drive screws into Styrofoam, it more readily senses the lack of resistance (compared with a brushed motor) and begins to pull only what little charge it needs from the battery. Instead of brushes and a commutator, a small circuit board coordinates the energy delivery to the windings.īecause the electronics communicate directly with the stationary windings, the tool adjusts according to the task-which is why the companies market these as "smarter" tools. 36V (18V X2) LXT Brushless String Trimmer Kit with 4 Batteries (5. /rebates/2fdepartments2flawn-and-garden2foutdoor-power-equipment2ftrimmers-and-edgers&. And the locations of the magnets and windings are reversed: The magnets are on the conventional motor shaft and the copper windings of the armature are fixed and surround the shaft. Weed Eater FeatherLite FL20 Gas Powered Trimmer (Factory Refurbished) - Compare. Cordless Battery Carbon Fiber Shaft String Trimmer w/ 6. Cordless Carbon Fiber Shaft Attachment Capable String Trimmer with 4.0 Ah Battery and Charger Add to Cart Compare Exclusive More Options Available ( 311) Model RY402110 RYOBI 40V HP Brushless Whisper Series 17 in. How Brushless Motors WorkĪ brushless motor loses the brushes and the commutator. ( 1282) Model RY40290 RYOBI 40V HP Brushless 15 in. The spin doesn't stop until the charge from the battery stops. The windings are magnetized by the charge and push against the stationary ring of magnets that surround it, forcing the armature assembly to spin. (The brushes are spring-loaded to maintain physical contact with the commutator.) The commutator then passes the charge on to the armature, which is made up of copper windings (they look like bundles of copper wire). However, petrol has an environmental impact, is expensive and messy and trimmers are heavy, noisy and require regular maintenance.When the motor is energized, a charge travels from the battery, through the brushes, and into the commutator.
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