How To Brake The Micro Brushless DC Motor Telescopic Straw

   Miniature brushless DC motor braking is usually the use of the motor itself for rapid braking. There are two simple methods, one is dynamic braking, the other is short-circuit braking, dynamic braking is to consume the kinetic energy of the motor On the external braking resistor, short-circuit braking is to consume the kinetic energy of the motor in the motor

On the stator windings. Obviously, dynamic braking is more beneficial to reduce the heating of the motor. However, the short-circuit brake does not require any changes to the hardware. Simple and convenient is its outstanding advantage, so the focus is on short-circuit brake. ?

The so-called short-circuit braking means that when braking, the upper bridge arm (or lower bridge arm) of the driving MOS tube of the motor can be all turned on and the lower bridge arm (or upper bridge arm) is off. The three-phase stator winding of the motor All are shorted. A motor in the power generation state is equivalent to a short circuit in the power supply. Because around

The resistance of the group is relatively small, so it can generate a large short-circuit current. The kinetic energy of the motor is quickly released in the DC brushless motor factory, so that the motor instantly generates a great braking torque, which can achieve the effect of rapid braking. The higher the motor speed, the greater the short-circuit current, the brushless motor DC,

The braking force is also greater. However, it must be considered that it cannot exceed the endurance of the MOS tube, so generally wait for the motor speed to decrease to a certain level before using the short-circuit brake.