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What are the characteristics of frequency conversion speed regulation of CNC punch feeder?

2020-06-23(1509)Views

CNC punch feeder is a kind of mechanical equipment used in conjunction with CNC punch press. It can be accurately positioned and fed after programming, making the processing of sheet metal parts easier, allowing the mechanical processing to be completely separated from the labor, and shortening the processing process. One-time punching of multiple holes and other advantages, however, most CNC punch feeders will use frequency conversion speed regulation, below we mainly talk about the characteristics of CNC punch feeder frequency conversion speed regulation?

　　1, reduce mechanical transmission parts

　　Because the current vector control inverter and synchronous motor can achieve efficient torque output, thereby saving gear box and other mechanical transmission components, * finally constitutes a direct frequency conversion transmission system. Thus, cost and space can be reduced and stability can be improved.

　　2, adjustable running speed

　　Using frequency conversion speed regulation can optimize the technological process, and can change rapidly according to the technological process, and can also realize the speed change through remote control PLC or other controllers.

　　 3, good energy saving

　　Centrifugal fans or water pumps can greatly reduce energy consumption after using frequency converters, which has been reflected in more than ten years of engineering experience. Since the final energy consumption is proportional to the speed of the motor, the return on investment is faster after the frequency conversion is used, and the manufacturer is willing to accept it.

　　4, many controlled stopping methods

Just like the controlled acceleration, in the frequency conversion speed regulation, the stopping method can be controlled, and there are different stopping methods to choose from (deceleration stop, free stop, deceleration stop + DC braking), also it can reduce the mechanical components and The impact of the motor makes the entire system more reliable and the life expectancy will increase accordingly.

　　5, lower power required at startup

　　Motor power is proportional to the product of current and voltage, then the power consumed by the motor directly started by the power frequency will be much higher than the power required by the frequency conversion start. Under some operating conditions, the power distribution system has reached the highest limit. The surge generated by the direct power frequency starting motor will have a serious impact on other users on the same network. If the inverter is used to start and stop the motor, There will be no similar problems.

　　6, control the starting current of the motor

　　When the motor is directly started by the power frequency, it will generate 7 to 8 times the rated current of the motor. The use of frequency conversion speed regulation can fully reduce the starting current and improve the winding endurance. The direct benefit of the user* is that the maintenance cost of the motor will be further reduced, and the life of the motor will be increased accordingly.

　　7, Controllable acceleration function

　　Frequency conversion speed regulation can start at zero speed and accelerate smoothly according to the needs of users, and its acceleration curve can also be selected. When starting at power frequency, it will produce violent vibration on the shaft or gear of the motor or the connected mechanical parts. This vibration will further aggravate mechanical wear and loss and reduce the life of mechanical parts and motors.

　　 8, reversible operation control

　　 In the inverter control, to achieve reversible operation control without additional reversible control device, only need to change the phase sequence of the output voltage, which can reduce maintenance costs and save installation space.

　　9, reduce power line voltage fluctuations

　　When the motor power frequency starts, the current will increase sharply, and the voltage will also fluctuate greatly. The magnitude of the voltage drop will depend on the power of the starting motor and the capacity of the distribution network. The voltage drop will cause the voltage sensitive equipment in the same power supply network to trip or malfunction. And after adopting frequency conversion speed regulation, because it can start gradually at zero frequency and zero voltage, the voltage drop can be eliminated to a large extent.

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