Application of MOSFET in the drive circuit of DC brushless motor

In our daily life, DC brushless motors are not common, but in fact, DC brushless motors, which are composed of motor body and driver, are now widely used in high-tech fields such as automotive, tools, industrial industrial control, automation and aerospace, due to its reliable performance, no wear and tear, low failure rate, life expectancy than the brushed motor increased by about 6 times and other advantages. It is because the DC brushless motor has such a significant role, that in order to give full play to its performance, choose a good MOSFET to drive the circuit is also very important.

DC motor has a rapid response, starting torque, from zero speed to rated speed can provide rated torque performance, but the advantages of the DC motor is also its shortcomings, because the DC motor in order to produce a constant torque under rated load performance, the armature magnetic field and rotor magnetic field must be maintained at a constant 90 °, which needs to be realized by the carbon brushes and rectifier. Carbon brushes and rectifiers generate sparks and carbon dust when the motor rotates, so in addition to causing damage to the components, they can be used in limited applications.

If you want to improve the performance of the drive motor, you must start from the power components, a MOSFET that can drive the circuit very well is very important, for this performance needs of DC brushless motor, Guanhua Weiye has a special N-channel enhancement of high-voltage power FETs, with a low charge, low reverse transfer capacitance, fast switching speed and other characteristics.

At the same time, this MOSFET can also be used to drive welding machines and switching power supplies.