bldc motor starting frequency is not too high, it is just starting because bldc motor speed is zero, the starting process, the load torque in addition to overcoming the resistance torque, but also to overcome the inertia of the rotating part of masking, so when the motor starter than in the burden of continuous operation as the most important.
If the starting pulse frequency is too high, the rotor speed to keep up with the speed of the stator rotating magnetic field, so the first step over the position far behind the equilibrium position, the subsequent step in the rotor speed increased marginally, while the stator magnetic field still pulse frequency proportional to the speed of forward rotation, the equilibrium position of the rotor and increasing the distance between the final position for the rotor dynamic stability region fell outside the emergence of-step or oscillation, and therefore the motor can not start.
In order to properly start, starting frequency is not too high, when the motor starts and then gradually increased frequency.
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