Inverter is more and more widely used in industrial equipment. Inverter shows good control characteristics in the application of mechanical equipment, which can effectively realize soft start and stepless speed regulation of industrial equipment, and make industrial equipment accelerate The deceleration is effectively controlled, which greatly improves the performance and automation of industrial equipment. In recent years, frequency converters have been widely used in industrial production. There are some problems in the process of using frequency converters, which will seriously affect the performance of industrial equipment. Relevant personnel must pay attention to the maintenance of frequency converters and take effective measures to solve the problems of The problems existing in the application of equipment can ensure the good performance and longer service life of industrial equipment.

Effective Measures of Inverter

1.Measures to suppress harmonics.

In order to effectively suppress the high-order harmonics of the frequency converter of industrial equipment, methods such as appropriately increasing the internal positive reactance of the power supply of the frequency converter, installing reactors, realizing multi-phase operation of the frequency converter and setting special harmonics can be adopted. These methods can effectively suppress the frequency converter Harmonics generated at work. Normally, the internal impedance of the inverter power supply equipment can play the role of buffering the reactive power of the DC filter capacitor. The larger the internal impedance of the inverter power supply equipment, the smaller the high-order harmonics generated, which belongs to the short-circuit impedance of the inverter. , Therefore, in the process of selecting the power supply of the inverter, the inverter with larger short-circuit impedance should be selected. Appropriate reactors can also be connected to the input and output ends of industrial equipment inverters, or high-order harmonic filters can be installed at the input and output ends, so as to effectively absorb the high-order harmonics generated by the inverter when it is working, and increase the The impedance of the large power supply or load can effectively achieve the purpose of suppressing the high-order harmonics of the inverter. In order to effectively suppress the high-order harmonics generated during the operation of the frequency converter, the form of multi-phase operation of the frequency converter can also be adopted. Since the frequency converter commonly used in industrial equipment is a six-pulse rectifier, the harmonics generated by the frequency converter during operation are relatively large. Higher harmonics generated during work. In addition, a special filter can also be set to detect the frequency converter and phase, so that it can generate a current with the same amplitude as the harmonic current but opposite in phase, and apply it to the frequency converter, so as to effectively absorb high-order harmonic current the goal of.

2.Effective measures to reduce noise and vibration.

During the working process of the frequency converter in industrial equipment, the motor will generate a lot of noise, which has a very close relationship with the frequency of the PWM control switch. Usually, an AC reactor can be connected to the output end of the inverter to suppress and reduce the noise. Careful inspection. In order to effectively weaken or eliminate the resonance of industrial equipment when the frequency converter is working, an AC reactor can be connected to the output end of the frequency converter to effectively absorb the high-order harmonics in the output current of the frequency converter. However, when PAM or square wave PWI inverter is used for speed regulation of industrial equipment, it can be changed to a sine wave PWM inverter to effectively reduce the vibration of industrial equipment under the action of harmonics in the pulsating torque mode.

Effective Measures of Inverter

3.Effective measures to solve the heating problem of the inverter.

The frequency conversion used in industrial equipment is prone to heating. Overheating of the frequency converter will seriously affect the quality, performance and service life of the frequency converter. Therefore, effective measures should be taken to reduce the heat of the frequency converter in industrial equipment. Install a fan inside the inverter to dissipate the heat inside the inverter case. In addition, attention should be paid to the control of the operating environment temperature of the inverter. The inverter is an electronic device and contains many electronic components and electrolytic capacitors inside. Therefore, the inverter has a high requirement for the operating environment temperature. Between -10C and 50C, and reduce the temperature of the inverter as much as possible during operation, so that the inverter can operate normally, reduce the failure rate of the inverter, improve the service life of the inverter, and make it stable.

Inverter is more and more widely used in industrial equipment. Inverter shows good control characteristics in the application of mechanical equipment, which can effectively realize soft start and stepless speed regulation of industrial equipment, and make industrial equipment accelerate The deceleration is effectively controlled, which greatly improves the performance and automation of industrial equipment. In recent years, frequency converters have been widely used in industrial production. There are some problems in the process of using frequency converters, which will seriously affect the performance of industrial equipment. Relevant personnel must pay attention to the maintenance of frequency converters and take effective measures to solve the problems of The problems existing in the application of equipment can ensure the good performance and longer service life of industrial equipment.

Effective Measures of Inverter

1.Measures to suppress harmonics.

In order to effectively suppress the high-order harmonics of the frequency converter of industrial equipment, methods such as appropriately increasing the internal positive reactance of the power supply of the frequency converter, installing reactors, realizing multi-phase operation of the frequency converter and setting special harmonics can be adopted. These methods can effectively suppress the frequency converter Harmonics generated at work. Normally, the internal impedance of the inverter power supply equipment can play the role of buffering the reactive power of the DC filter capacitor. The larger the internal impedance of the inverter power supply equipment, the smaller the high-order harmonics generated, which belongs to the short-circuit impedance of the inverter. , Therefore, in the process of selecting the power supply of the inverter, the inverter with larger short-circuit impedance should be selected. Appropriate reactors can also be connected to the input and output ends of industrial equipment inverters, or high-order harmonic filters can be installed at the input and output ends, so as to effectively absorb the high-order harmonics generated by the inverter when it is working, and increase the The impedance of the large power supply or load can effectively achieve the purpose of suppressing the high-order harmonics of the inverter. In order to effectively suppress the high-order harmonics generated during the operation of the frequency converter, the form of multi-phase operation of the frequency converter can also be adopted. Since the frequency converter commonly used in industrial equipment is a six-pulse rectifier, the harmonics generated by the frequency converter during operation are relatively large. Higher harmonics generated during work. In addition, a special filter can also be set to detect the frequency converter and phase, so that it can generate a current with the same amplitude as the harmonic current but opposite in phase, and apply it to the frequency converter, so as to effectively absorb high-order harmonic current the goal of.

2.Effective measures to reduce noise and vibration.

During the working process of the frequency converter in industrial equipment, the motor will generate a lot of noise, which has a very close relationship with the frequency of the PWM control switch. Usually, an AC reactor can be connected to the output end of the inverter to suppress and reduce the noise. Careful inspection. In order to effectively weaken or eliminate the resonance of industrial equipment when the frequency converter is working, an AC reactor can be connected to the output end of the frequency converter to effectively absorb the high-order harmonics in the output current of the frequency converter. However, when PAM or square wave PWI inverter is used for speed regulation of industrial equipment, it can be changed to a sine wave PWM inverter to effectively reduce the vibration of industrial equipment under the action of harmonics in the pulsating torque mode.

Effective Measures of Inverter

3.Effective measures to solve the heating problem of the inverter.

The frequency conversion used in industrial equipment is prone to heating. Overheating of the frequency converter will seriously affect the quality, performance and service life of the frequency converter. Therefore, effective measures should be taken to reduce the heat of the frequency converter in industrial equipment. Install a fan inside the inverter to dissipate the heat inside the inverter case. In addition, attention should be paid to the control of the operating environment temperature of the inverter. The inverter is an electronic device and contains many electronic components and electrolytic capacitors inside. Therefore, the inverter has a high requirement for the operating environment temperature. Between -10C and 50C, and reduce the temperature of the inverter as much as possible during operation, so that the inverter can operate normally, reduce the failure rate of the inverter, improve the service life of the inverter, and make it stable.

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