MotorControlling noise is nothing but two opposite causes: mechanical design and electrical technology.The motor is an electromagnetic device that realizes the conversion or transmission of electric energy according to the law of electromagnetic induction.Frequency conversion speed motorA general term for motors driven by frequency converters.In fact, the motor designed for the frequency converter is a special frequency conversion motor. The motor can achieve different speeds and torques under the drive of the frequency converter to adapt to the changes in the demand of the load.Explosion-proof motorsA kind of motor that can be used in flammable and explosive plants and does not generate sparks during operation.Explosion-proof motors are mainly used in coal mines, petroleum and natural gas, petrochemical and chemical industries.In addition, it is also widely used in sectors such as textiles, metallurgy, city gas, transportation, grain and oil processing, papermaking, and medicine.XNUMX. In terms of mechanical management, such as damage to the cooling fan of the motor or scratching of the motor casing, the motor company is unstable and so on.The developments in this area are easy to deal with and some, as long as the noise source can be found, it is generally easy to deal with.

1. Electrical technology (2) By setting the carrier signal frequency of the inverter too low, you can choose to set the carrier frequency appropriately and set it higher. At this time, we will develop and bring more social problems. If a carrier frequency is adjusted too much High, it will cause serious interference to the management of other related equipment of the enterprise, especially when the PLC communication service method is adopted.Therefore, teachers need to set different carrier frequencies according to the actual working conditions of the construction site. (3) Motor resonance Sometimes, a certain frequency band during the operation of the motor will affect the mechanical resonance.At this time, students can make full use of the frequency hopping setting teaching method of controlling the frequency converter.Generally speaking, the inverter has a frequency hopping setting. Its function is to set the frequency of motor resonance. When the inverter market runs to this frequency band, skip this frequency to avoid the occurrence of a resonance of the motor. (4) The analysis ability of the motor with load continues to decrease. Sometimes after the motor is used for a long time, or the quality of the motor product is not good, the calculation ability with load will be reduced.The noise of the motor here will also be larger than other normal times. (XNUMX) High-order harmonics of the inverter When the high-order harmonic components of the inverter are large, it is easy to cause the vibration of this kind of motor to increase, the speed change will cause jitter and instability, and the noise of the motor will gradually increase.Install AC (input side) and DC (output side) reactors here.