Inverter daily inspection?
Seriously do a good job in the daily inspection work of the inverter, the surrounding ambient temperature, whether the temperature meets the requirements; whether the ventilation effect is good; if the inverter is ventilated, it is too dust that has exceeded the dust. The inverter is normal. There is no alarm; whether the fan operation is normal; whether there is vibration or abnormal sound in the inverter; whether the deactivated inverter is working properly.
Can the drive stop frequently?
Yes, but when the inverter is stopped, you should have a certain time difference again (recommended for five minutes) to ensure that the inverter and the motor are completely stopped. Otherwise, it is easy to cause damage to the inverter.
What should I pay attention to in purchasing a frequency converter?
The purchase of the frequency converter should ensure that the rated current is consistent with the rated current of the motor, and the motor should be operated within the rated range. It should also be paid to the old old motor, and the old motor start current is larger than the new motor. If the same-made inverter may damage the inverter, the balance of the inverter to help the inverter is bigger, and the recommended inverter is the motor rated 1.5 times the power to ensure long-term operation of the motor.
What should I pay attention to when the inverter runs over 50 Hz?
When the inverter is running over 50 Hz, it has entered the constant power stage. If the running frequency is 80 Hz, the power of the inverter should be increased (the frequency converter power can be added to the factor of 80/50 = 1.6), and the power and mechanical characteristics of the motor are increased, and it should be ensured that the motor is operating in high frequency. There is sufficient output torque.
Can the inverter run in a low frequency state for a long time?
Since the inverter is operating at low frequencies, the current is too large, long-term operation, and it is easy to damage the inverter and motor. If you want to have a long time in a low frequency state, you should ensure that the motor has sufficient torque and increases the inverter power and motor.
Can a frequency converter drag two electric motors?
If the two motors start at the same time, the power of the inverter should be 1.5 times the power of the two motors. If it is in order, the second motor is equivalent to full start, calculated by 7 times the rated value, the overcurrent required to be affected is 8 times the rated current of the frequency converter. Therefore, in order of one-inverter dragged two motors in order, there is no advantage in the price, and the size is recommended to use two separately dragged inverters.
Why do the inverters installed in the control cabinet often reset, misunderstand?
Since there are more power switches, AC contactors, and other control devices in the control cabinets, power supply and control circuits generate a lot of high-end harmonic signals, electromagnetic signals, these high-grade harmonic signals, and electromagnetic wave signals interfere with the inverter. Normal operation, causing the inverter to reset, and then modify the program content of the inverter, so that the drive often is often mistaken, and even damages the inverter. For this situation, you should do a good job: 1. Terminal E ground; 2. Control the line must use the shield line and cannot be mixed with the power line. One end of the shield is connected to the GND, and the other is floating. It cannot be connected to the terminal E. The lead is as short as possible; 3. The mounting of the inverter is as short as possible from the power switch and other interference sources.
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