12v brushless motor of power tools

Brushless DC motors were developed from conventional brushed DC motors with the availability of solid state power semiconductors - details see: http://www.machineto.com/12v-brushless-motor-of-power-tools-10237730
Place of Origin:Guangdong China (Mainland)Brand Name:xinhe motorModel Number:XH 4660Usage:Fan,Home Appliance
Certification:ROHSType:BRUSHLESS DC MOTORTorque:<20N.mConstruction:Other
Commutation:BrushlessProtect Feature:OtherSpeed(RPM):2000~30000rpmContinuous Current(A):0.2~3A
Output Power:30~150WVoltage(V):12V 24V 48VEfficiency:IE 2 
12v brushless motor of power tools
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The commutation function may be performed by various shaft position sensors: optical encoder, magnetic encoder (resolver, synchro, etc), or Hall effect magnetic sensors. Small inexpensive motors use Hall effect sensors. (Figure below) A Hall effect sensor is a semiconductor device where the electron flow is affected by a magnetic field perpendicular to the direction of current flow.. It looks like a four terminal variable resistor network. The voltages at the two outputs are complementary. Application of a magnetic field to the sensor causes a small voltage change at the output. The Hall output may drive a comparator to provide for more stable drive to the power device. Or, it may drive a compound transistor stage if properly biased. More modern Hall effect sensors may contain an integrated amplifier, and digital circuitry. This 3-lead device may directly drive the power transistor feeding a phase winding. The sensor must be mounted close to the permanent magnet rotor to sense its position.

Packaging Detail:carton
Delivery Detail:30days

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