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Key factors of motor torque

更新:03-04-2020
摘要:

The harmonic component of the winding current of the mo […]

The harmonic component of the winding current of the motor torque is directly related to the power supply harmonics, and the factors affecting the harmonic component of the air gap magnetic field are more complicated. The magnetic field of the rotor harmonic current and the stator harmonic magnetic field that generates the rotor harmonic current At various rotor speeds, it keeps synchronous rotation and is relatively stationary. So what is the key factor of motor torque? Let's take a look together.

The harmonic component of the winding current is directly related to the power supply harmonics, and the factors affecting the harmonic component of the air gap magnetic field are more complicated. When the sine wave power supply is powered, due to the uneven spatial distribution of the windings and the uneven air gap, the fundamental current will also produce asynchronous, synchronous and additional torque. Asynchronous additional torque is the torque generated by the uniform effect of each harmonic in the air gap magnetic field and the rotor magnetic field generated by the rotor harmonic current induced in the rotor winding。

Running accuracy is just an incidental function of subdivision technology. After subdivision, the resolution of each pulse is improved when the motor is running, but whether the running accuracy can reach or approach the pulse resolution depends on other factors such as the subdivision current control accuracy of the subdivision driver. The accuracy of subdivision drivers of different manufacturers may vary greatly; the greater the number of subdivisions, the more difficult it is to control the accuracy. The real subdivision has very high technical and technological requirements for the driver, and the cost will be higher.From the above information, it is understood that a major factor that affects the torque of the motor is that the magnetic field of the rotor harmonic current and the stator harmonic magnetic field that generates the rotor harmonic current keep rotating synchronously and are relatively stationary at various rotor speeds, so It can produce average torque, which is an important factor affecting it.

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