A large number of industrial control equipment are used in industrial automation, including PLC, frequency converter, servo controller, instrumentation, touch screen, industrial computer, etc. Today, we will focus on introducing the application of down converters.
In the current industrial production field, the three-phase motor is the leading role, which provides continuous power for most of the production process, such as existing compressors, refrigerators, water pumps, cooling towers, hydraulic power, fans, etc. etc., all rely on the electric motor to convert electric energy into power to ensure the continuous production. In our country, the frequency of the current power supply condition is 50HZ, and the frequency represents the motor speed to some extent. When the number of stator pole pairs of the motor is fixed, the running speed of the motor is determined by the power frequency, which can only be run at a fixed speed.
With the technical needs of industrial production, we need to adjust the speed of the motor. Before the appearance of the frequency converter, if we want to adjust the speed of the motor, we need to find a way from the ratio of the motor to the mechanical transmission, but these two methods are in practice. The process has brought great troubles to the production.
The change of the mechanical method causes the load to run only at one or several fixed frequencies, which cannot adapt to the real-time changes in production. In addition, stepless speed regulation is realized by adjusting the electromagnetic torque of the prime mover and the driven machine, but the efficiency is low , low-frequency operation performance deteriorates; the change of the electrical method is to change the number of pole pairs of the motor, which is realized by changing the connection method of the natural group, but this method needs to cooperate with the external control circuit, which leads to an increase in the complexity of the equipment, which is not ideal. .
In this way, due to the factory’s need for motor speed regulation, frequency converters came into being. As long as the frequency of the power supply can be changed, the frequency of the motor can follow in real time. In this way, the operating speed limit of the motor is broken. As long as the frequency changes arbitrarily, The mechanical properties of the motor allow it to run at any frequency.
The use of frequency converters for speed regulation mainly has the following advantages:
Advantage 1: stepless speed regulation, which can be adjusted in a smooth frequency range to meet the needs of production;
Advantage 2: energy saving, when the motor is running at low frequency, the power consumption The reduction is faster, and we will share this aspect with you in the follow-up;
Advantage 3: Excellent soft start performance, compared with the star-delta start of the drive, the autotransformer decompression start, and the thyristor decompression start, the inverter can be said to be superior It is extremely excellent. The former has a large start-up current impact, which is not good for the safety of the equipment, while the latter runs smoothly and has a small impact, which ensures the safety of the equipment.
The above advantages have led to the wider application of inverters in the industrial field. In the future, we will focus on introducing the use and maintenance of inverters.
A large number of industrial control equipment are used in industrial automation, including PLC, frequency converter, servo controller, instrumentation, touch screen, industrial computer, etc. Today, we will focus on introducing the application of down converters.
In the current industrial production field, the three-phase motor is the leading role, which provides continuous power for most of the production process, such as existing compressors, refrigerators, water pumps, cooling towers, hydraulic power, fans, etc. etc., all rely on the electric motor to convert electric energy into power to ensure the continuous production. In our country, the frequency of the current power supply condition is 50HZ, and the frequency represents the motor speed to some extent. When the number of stator pole pairs of the motor is fixed, the running speed of the motor is determined by the power frequency, which can only be run at a fixed speed.
With the technical needs of industrial production, we need to adjust the speed of the motor. Before the appearance of the frequency converter, if we want to adjust the speed of the motor, we need to find a way from the ratio of the motor to the mechanical transmission, but these two methods are in practice. The process has brought great troubles to the production.
The change of the mechanical method causes the load to run only at one or several fixed frequencies, which cannot adapt to the real-time changes in production. In addition, stepless speed regulation is realized by adjusting the electromagnetic torque of the prime mover and the driven machine, but the efficiency is low , low-frequency operation performance deteriorates; the change of the electrical method is to change the number of pole pairs of the motor, which is realized by changing the connection method of the natural group, but this method needs to cooperate with the external control circuit, which leads to an increase in the complexity of the equipment, which is not ideal. .
In this way, due to the factory’s need for motor speed regulation, frequency converters came into being. As long as the frequency of the power supply can be changed, the frequency of the motor can follow in real time. In this way, the operating speed limit of the motor is broken. As long as the frequency changes arbitrarily, The mechanical properties of the motor allow it to run at any frequency.
The use of frequency converters for speed regulation mainly has the following advantages:
Advantage 1: stepless speed regulation, which can be adjusted in a smooth frequency range to meet the needs of production;
Advantage 2: energy saving, when the motor is running at low frequency, the power consumption The reduction is faster, and we will share this aspect with you in the follow-up;
Advantage 3: Excellent soft start performance, compared with the star-delta start of the drive, the autotransformer decompression start, and the thyristor decompression start, the inverter can be said to be superior It is extremely excellent. The former has a large start-up current impact, which is not good for the safety of the equipment, while the latter runs smoothly and has a small impact, which ensures the safety of the equipment.
The above advantages have led to the wider application of inverters in the industrial field. In the future, we will focus on introducing the use and maintenance of inverters.
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