ネタ | stepper motor道場 | 学問・研究 | まにあ道

The inductive coil of a stepper motor has a certain inductance, because each phase winding of a stepper motor is an inductive coil. The inductance has the characteristic of delaying current changes. When the stepper motor rotates, the inductance of each phase winding of the motor will form a back electromotive force; the higher the frequency, the greater the back electromotive force.

Generally speaking, at low frequencies, the energization time of each phase winding is longer than the power-off time, which is greater than the time constant of the coil, and the coil has time to obtain a higher current.

At high frequency, the energization time and power-off time of each phase winding are very short, much smaller than the time constant of the coil, and the current obtained by the coil is very small. The torque is approximately proportional to the square of the current, so that the higher the frequency, the smaller the average current in the winding, the average torque of the motor is greatly reduced, and the load capacity is greatly reduced.

The load capacity of a stepper motor China increases or decreases with the increase or decrease of the speed, which has a very large relationship with the stator winding inductance.