BMC Eletric Motors Have A Simple Manufacturing, Low Cost

BMC Eletric Motors: BMC Eletric Motors is the ordinary DC motor stator and rotor were interchangeable. The rotor for the permanent magnet to produce air gap flux: stator for the armature, composed of multi-phase winding. In structure, it is similar to a permanent magnet synchronous motor.

The structure of the BMC Eletric Motors stator is the same as that of a conventional synchronous motor or induction motor. In the core embedded in the multi-phase winding (three-phase, four-phase, five-phase range). The windings can be star or triangular and connected to the power tubes of the inverter for reasonable commutation. Rotor more use of samarium cobalt or NdFeB and other high coercivity, high residual magnetic density of rare earth materials, magnetic poles due to the location of the different magnetic materials. Can be divided into surface magnetic pole, embedded magnetic pole and ring magnetic pole. As the motor body for the permanent magnet motor, so the habit of BMC Eletric Motors is also called permanent magnet BMC Eletric Motors.

Brush DC motor: Brush motor 2 brush (copper brush or carbon brush) is fixed through the insulation seat on the motor back cover directly to the positive and negative power supply into the rotor of the inverter, and the inverter connected The coil on the rotor, three coil polarity of the alternating transformation and fixed on the shell of two magnets to form a force and turn up. As the commutator and the rotor fixed together, and the brush and the shell (stator) is fixed together, the motor rotation and the commutator constantly friction and produce a lot of resistance and heat. So the efficiency of brush motor is very low loss is very large. But the brush motor has the advantages of simple manufacturing, low cost and low cost.

DC Excitation Motor: The excitation winding is not electrically connected to the armature. The excitation circuit is supplied by another DC power supply, so the excitation current is not affected by the armature terminal voltage or armature current.

BMC Eletric Motors: the voltage across the winding is the voltage across the armature, but the field winding is wound with a thin wire with a large number of turns, so it has a large resistance, making it smaller through his excitation current.

DC series motor: the excitation winding is connected in series with the armature, so the magnetic field within the motor with the armature current changes have significant changes. In order to make the field winding does not cause large losses and voltage drop, the smaller the better the resistance of the field winding, so the DC series motor is usually wound with thicker wire, the number of turns less.

DC Torque: The magnetic flux of the motor is generated by the excitation current in the two windings.