1. Harmonic problems
The equipment that plays the role of switching in the main circuit of the inverter must generate harmonics in the process of turning on and off the circuit. The lower harmonics generally have a greater impact on the motor load and cause torque ripple; The higher harmonics add the leakage current of the inverter output cable, making the motor output insufficient. Harmonic disturbance can also lead to the malfunction of the relay maintenance device, so that the electrical surface measurement is inaccurate, and even the normal operation is impossible.
2. Noise and oscillation
Noise and oscillation will occur when the inverter is used to regulate the speed, because the output waveform of the inverter contains a higher harmonic weight. With the change of operating frequency, the weight of the fundamental wave and the weight of higher harmonics change in a large range, and it is likely to resonate with the inherent mechanical oscillation frequency of the motor, which is the source of noise and oscillation.
3. Fever problem
The heat generated by the internal loss during the operation of the inverter accounts for 98% of the main circuit and about 2% of the control circuit. Together in the summer, the ambient temperature is too high, so that the temperature of the inverter rises, the temperature can be as high as 80-90 °C, because the inverter is an electronic device, containing electronic equipment and electrolytic capacitors, etc., the temperature is too high to cause the failure of the components, so that the LCD screen data can not be displayed, and the phenomenon of inverter maintenance action often occurs.
Therefore, the harmonics output by the inverter must be pressed within the allowable range, and the noise and oscillation must be eliminated or weakened together, and the inverter should be dissipated to prolong the service life of the inverter.
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More on that
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Delta's inverter is powered on and commissioned
After the installation of the Delta inverter is completed, disconnect the output of the inverter, use the diode file of the digital meter to measure the input and output of the inverter before the power is not turned on to ensure that there is no short circuit, and then turn on the operating power supply of the inverter.
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The reason for the slow response after the frequency converter potentiometer adjusts the frequency - Delta
The external use resistor is an external operation form of the inverter, which controls the inverter through the external operation signal generated by the external starting switch and frequency setting potentiometer. The regular external voltage signal of different inverters is different.
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Analysis of the power-on trip problem of Delta inverter
In life and production, leakage switches are often used. But the inverter is not used much at some times. Most manufacturers often use leakage switches as the main switch when installing switches in the workshop. When the frequency conversion control is elected, the problem comes out, and the leakage switch is always tripped after a little moment...
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Delta launched an integrated control solution for layer winding
As factories move from automation to intelligence, the requirements for equipment performance and scalability are progressing day by day. In response to the rapid development of electronic engineering, transportation and mechanical engineering and other occupations, in order to quickly manufacture related product parts and components, metal coil winding technology is also being carried out at a high speed.
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Delta's key steps in inverter maintenance
First, the maintenance of the inverter must first check whether the sound in the operation of the motor is abnormal, including, whether the motor is in operation to form a sensation.
2. Check whether the natural environment of the inverter installation has changed. ...
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Introduction to the basic application of Delta inverter
Generally, household appliances use a single-phase asynchronous motor, which relies on capacitance or resistance to split the phase. Motors are often in a short-term repetitive state (on/off) during operation, such as air conditioners, refrigerators, etc. This will inevitably lead to frequent starting, high noise, short motor life, poor temperature stability and energy consumption.
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How does Delta inverter adjust the frequency?
Delta's frequency modulator frequency modulation is mainly operated on the control panel, and the process:
1. Press the Menu button to enter the parameter programming menu,
2,P0.01=1,Enter this parameter to complete the correction frequency of the panel button, ...
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Selection of braking resistors for Delta inverters
1. The necessity of braking resistance
If the regenerative energy that occurs during deceleration and descent in the application is too large, there is a possibility that the voltage of the main circuit inside the inverter will rise, causing damage.
Because usually the inverter has a built-in overvoltage maintenance function, the main circuit overvoltage (O...
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Basic conditions for Delta UPS uninterruptible power supply
1. Visually inspect the UPS and battery (or other energy storage) equipment for obstacles, and properly cool the surrounding area.
2. Ensure that there is no abnormal operation or positive warning on the UPS panel, such as: overload or overdischarge of the battery close to it.
3. Check if there is battery corrosion or other shortcomings ...
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The output of the inverter is not short-connected to the power frequency
1. To switch the motor of the power frequency, the parking method is set to free parking, and it is important not to park softly
2. Intercept the contactor of the motor from the output end of the inverter, and the control stop button and the inverter parking button are the same composite button, that is, when the inverter is pressed, the inverter parking will be followed by the contactor line.
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Selection of inverter box structure - Delta
The box structure of the inverter should be adapted to the environmental conditions, that is, the temperature, humidity, dust, pH, corrosive gas and other elements must be considered. There are several common types of structures that users can choose from:
1) Open IPOO ...
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Servo motor speed improvement method - Delta
When many engineers debug servo motors, they often have such a problem: why is my servo motor so slow, how can I improve the speed, and how much can the maximum speed reach? The basis for the confirmation of the speed method of the servo motor: the speed of the servo motor.
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Precautions for summer maintenance and maintenance of inverters - Delta
1. Check the operating status of the inverter, whether the voltage and current value during operation are within the normal range.
2. Carefully monitor and record the ambient temperature of the frequency conversion room, and the ambient temperature is generally between -10 °C and 40 °C. The temperature rise of the phase-shifting transformer should not exceed 130°C.
3. Avoid ...
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Delta's soft starter component role
The soft starter is a device used to control the start and stop of the motor, which is composed of a number of components, including the soft starter controller, the soft starter conditioner, the soft starter power supply, the soft starter input and output module, the soft starter interface module, etc.
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Selection of Delta power supply
There are many models of Delta's power supplies, and the currents and functions supported are also different, so how to choose?
VX Series Power Supplies.
VX270: Active PFC270w, but 12v is still small and can only be used at low power.
Active PFC and 12v output up to 276w at 300...
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Delta's inverter adjusts the motor speed mode
The speed control on Delta's inverter is mainly as follows:
1. Adjust the variable resistance directly from the surface of the Delta inverter
2. External analogue voltage or current signal to adjust
3. Take advantage of the multi-function of the inverter ...
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Misunderstandings in the application of Delta inverters
The capacity selection of the inverter is based on the rated power of the motor
Myth: The capacity selection of the inverter is based on the rated power of the motor
Compared with the electric motor, the price of the inverter governor is more expensive, so it is important to ensure that the ...
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Analysis of misunderstandings in the application of Delta inverters
The capacity selection of the inverter is based on the rated power of the motor
Myth: The capacity selection of the inverter is based on the rated power of the motor
Compared with the motor, the price of the frequency converter is the most expensive, so under the premise of ensuring safe and reliable operation, the frequency conversion can be reasonably reduced.
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Delta's inverter composition and function
Delta inverter is a device that converts the power supply (50Hz or 60Hz) into a communication power supply of various frequencies to complete the variable speed operation of the motor, in which the control circuit completes the control of the main circuit, the rectifier circuit converts the communication power into direct current, and the output input of the DC center circuit to the rectifier circuit is ...
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Delta's N 1-3kVA series has three core advantages
In addition to adhering to the high reliability, excellent efficiency and outstanding power of Delta's UPS products, the N1-3kVA series has three obvious core advantages:
1. High availability planning
Delta N 1-3kVA series ...
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