The bldc motor suppliers tells you the effect of the DC motor starting frequency is too high
The starting frequency of the DC motor should not be too high. This is because the speed of the DC motor is zero when it is started. In the starting process, the electromagnetic torque overcomes the inertia mask of the rotating part in addition to the load resistance torque, so the motor is started. The burden is heavier than continuous operation.
If the pulse frequency is too high at startup, the speed of the rotor will not keep up with the speed at which the stator magnetic field rotates, so that the position where the first step is completed is far behind the equilibrium position, and the rotor speed is not increased much in the subsequent steps, while the stator magnetic field is still It rotates forward at a speed proportional to the pulse frequency, so the distance between the rotor and the equilibrium position becomes larger and larger, and finally the step of the rotor falls outside the dynamic stability zone and the phenomenon of out-of-step or oscillation occurs, so that the motor cannot be started.
The starting frequency of various DC motors is different. It is necessary to determine the starting frequency according to the motor's description data. Many DC motors with high starting frequency use dual voltage operation, that is, the starting moment changes from high voltage to low voltage, and the smaller the step size, the higher the frequency. Start up, the higher the power, the more suitable for high frequency operation.
