מנוע לשער חשמליThe article Precisely how Electric Motors Work talks about how brushed motors work. In a typical POWER car, there are permanent magnets on the lateral side and the spinning armature on the inside. This permanent magnets are standing, so they are called the stator. The armature rotates, therefore this is called the rotor.
Often the armature contains a electromagnet. When you run electrical energy into this electromagnet, it creates a magnets field inside the colonne that attracts together with resists the magnets in the stator. So the colonne moves through 180 diplomas. To continue to keep it spinning, you own to change the rods of the electromagnet. Typically the tooth brushes handle this switch in polarity. They help to make contact with two rotating electrodes attached to often the canevas and flip typically the permanent magnet polarity of typically the electromagnet because it spins.
This specific setup works out and is simple and cheap in order to manufacture, but it possesses a lot of troubles:
The tooth brushes eventually don out. Because the brushes are making/breaking connections, you obtain sparking and electrical noi
The brushes limit the absolute maximum speed of the drive mechanism. Keeping the electromagnet in the particular center of the electric motor makes the idea harder to cool.
The use regarding brushes sets a restrict on how many posts the armature can currently have. Using the advent of low-priced pcs and even power diffusion, that grew to be possible in order to "turn the motor inside out" together with eliminate typically the brushes. In a brushless POWER motor, you place often the permanent magnets with the disc and anyone move the electromagnets to help the stator. Then you utilize a computer (connected to help high-power transistors) to cost up often the electromagnets like the shaft becomes.
This kind of system has all sorts of positive aspects:
Because some sort of computer control buttons the electric motor instead of technical tooth brushes, it's more accurate. The computer can also issue the pace of the motor unit into the equation.
2. This makes brushless power generators more efficient.
* Generally there is no sparking plus much less power noises.
* There are no brushes to wear out there.
* Using the electromagnets in the stator, they are incredibly easy to cool.
3. You can have a lot of electromagnets around the stator for more accurate control.
The only problem of a brushless engine is its increased original cost, but you can certainly generally recover that expense through the greater productivity in excess of the lifestyle of typically the motor.