The following four steps are very important for the commissioning of the inverter with the machine (i.e., connected to the motor) and no-load (i.e., the motor without load).
(1) Set the power of the motor, the number of pole pairs, and check the operating current of the inverter.
(2) Set the maximum output frequency and base frequency of the inverter and set the torque characteristics of the motor. The selection of the voltage/frequency (V/F) operation mode includes items such as the maximum operating frequency, the fundamental operating frequency (i.e., the base frequency), and the type of torque.
The maximum frequency refers to the highest frequency that the inverter motor system can run, because the maximum operating frequency of the inverter itself may be relatively high, when the maximum operating frequency of the motor is lower than the maximum operating frequency of the inverter, the frequency of the operation should be set according to the requirements of the motor and its load.
The basic operating frequency of the inverter refers to the dividing line between the constant power control and constant torque control of the motor by the inverter, which should be set according to the additional voltage of the motor. Whereas, the torque type refers to whether the load is a constant torque load or a variable torque load.
In the process of device commissioning, the user can choose one of the operation modes according to the V/F operation mode diagram and load characteristics in the inverter instruction manual. The general inverter is equipped with a number of V/F curves for users to choose, and the appropriate V/F curve should be selected according to the load nature.
However, in the case of fan and pump loads, the torque operation code of the inverter should be set to the variable torque and reduced torque operation characteristics. In order to improve the low-speed function of the inverter when starting, so that the output torque of the motor can meet the requirements of production load starting, the starting torque should be adjusted. In the frequency conversion speed regulation system of three-phase asynchronous motor, the control of the rotation distance is more complicated. In the low frequency band, because the effects of resistance and leakage reactance cannot be overlooked, if the v/f is still constant, the magnetic flux will be reduced, and thus the output torque of the motor will be reduced. Therefore, it is necessary to properly compensate the voltage in the low frequency band to increase the torque. Generally, the inverter is manually set and compensated by the user.
(3) Set the inverter to the operation form of the built-in keyboard, press the stop button and the run key respectively to investigate whether the motor can stop and start normally.
(4) Set the function of the electronic thermal relay in the inverter according to the introduction in the instruction manual of the inverter.
|
More on that
|
Motor starting mode - Senlan inverter
The inverter is a motor control (speed regulation) device that uses the on-off effect of power semiconductor devices to convert the power frequency power supply to another frequency.
Composition 1:
1. Rectifier unit: convert the communication electricity with fixed operating frequency into DC ...
|
|
How to carry out electrical system commissioning quota? ——Sunland inverter
The commissioning of the electrical system refers to the commissioning of the entire high and low voltage system. The power supply commissioning of civil electrical projects such as general residences, schools, office buildings, hotels, and shops shall be carried out in accordance with the following provisions:
(1) About the commissioning of the belt in the distribution room ...
|
|
A contactor is used between the inverter and the motor - Senlan inverter
Whether a contactor is used between the inverter (VFD) and the motor depends on the specific situation. When the contactor is on and off when the motor is running, the operating overvoltage is easy to cause VFD damage. Therefore, whether to use the contactor, it must be based on the actual situation to make the correct ...
|
|
Senlan direct torque control principle
The direct torque control (DTC) function of the inverter is another high-performance communication frequency conversion speed regulation system developed after vector control. In the mid-80s of the 20th century, the German scholar Depenbrock proposed the theory of direct torque control in 1985, and his idea was to combine the electric motor and the inverter.
|
|
Industrial control circuit board capacitor damage fault characteristics and maintenance - Senlan
Capacitor damage is the highest problem in electronic devices, especially electrolytic capacitors.
Capacitor damage is manifested in: 1. Capacity becomes smaller, 2. Capacity is completely lost, 3. Leakage, 4. Short circuit.
Electricity...
|
|
Hope Senlan inverter control panel button function diagram
Hope Senlan inverter control panel button function diagram
1. The "FUNC/DATA" button is a programming key, press this button once to convert the operation mode, and press it again to read and write the utility code.
2."S ...
|
|
How far apart is the motor from the inverter - Senlan inverter
The supplier of the supporting equipment of the inverter reminds you that the voltage waveform output by the inverter is similar to a sine wave, but not a real sine wave. Its waveform contains a large number of harmonic components, especially the higher harmonics will increase the output current of the inverter, causing the motor winding to heat up, and produce oscillation.
|
|
Sunland inverters are designed for environmental requirements
1. The ambient temperature ---- is generally "-10-+40°C"; Derating between 40 and 50°C, the additional output current must be reduced by 1% for every 1°C increase. If the ambient temperature is too high and the temperature changes greatly, the insulation of the inverter will be greatly reduced, which will affect the life of the inverter.
...
|
|
The connection method of the shielded wire adheres to the principle - Senlan inverter
1. The shield wire should be as close as possible to the low potential end, which can be understood in this way, generally we think that the ground potential is "0", and in reality, if there are two grounding terminals, there will be a potential difference between the two grounding terminals at a certain time, and there will be a current between the two wires, which is also a kind of agitation.
|
|
Sunland - inverter operation process and factory value restoration
The general operation process is as follows:
Enter the program through the operation panel and set the parameters, and set the relevant parameter groups such as the start-stop method, operation and control form according to the requirements of the industrial control. After confirming that the wiring is correct, the no-load power on test run and ...
|
|
Inverter maintenance and cleaning inspection method - Senlan inverter
There are many special faults, which come and go, looming, making it impossible to judge and deal with. At this time, you can clean the circuit board with water or alcohol, and brush off the dust and rust on the circuit board with a soft brush, especially pay attention to the solder joints are dense, and the circuit near the 0 volt copper layer is also ...
|
|
Limit switch wiring method - hope Senlan
Limit switch is an electromechanical control element used to detect the direction of the movement of the machine or equipment, and send a signal when the specific position is in a specific direction to control the operation or stop of the equipment. It is often used in industrial production processes, such as CNC machine tools, conveyors, loading and unloading robots, etc.
...
|
|
Rapid selection method of low-voltage inverter - Sunland inverter
First, according to the classification and selection of inverters
1. Inverters can be divided into general-purpose inverters and special inverters.
2. General-purpose inverters are mainly used in: general fan pumps (referring to inverters that only drag a single fan or pump) loads, mechanical loads, and loads requiring high overloads.
|
|
About the basic selection of Hope Sunland inverter
It is hoped that Sunland low-voltage inverter can be divided into four series:
1.HG1000 high-performance light-load intelligent inverter, the most cost-effective, the new series is widely used in medicine, food, packaging, cable, printing and dyeing, washing, centrifuge ...
|
|
Control the hovering function operation and principle of the inverter - Sunland inverter
How does the hovering function of the inverter work?
When the speed of the asynchronous motor is 0, the encoder response is meaningless, and it needs to be converted to V/F control, and the frequency is set to 0; The voltage is set to 0 speed at which the motor promises to withstand the current at the moment ...
|
|
Inverter heat dissipation treatment in use - Sunland inverter
If you want to make the inverter last a long time, you must seriously consider the problem of heat dissipation. Because the failure rate of the inverter increases exponentially with the increase of temperature, the service life decreases exponentially with the increase of temperature. A 10 degree increase in ambient temperature halves the service life of the inverter. Thus...
|
|
Analysis of soft start technology of asynchronous motor - Senland
The thyristor communicates the voltage regulation and soft starts
The communication and voltage regulation soft engine of the thyristor is mainly to change the connection method of the thyristor, and the traditional connection method is changed to connect to the three windings, so that the power supply of the thyristor is completed by the method of parallel connection. Thyristor soft starters have a strong ...
|
|
Application of Sunland inverter on gantry milling machine
The gantry milling machine is a machining equipment for processing larger workpieces, and its electrical control system includes two parts: the main transmission of the workbench and the logical control of the feed organization. Henan Jiaozuo Maike Company has a gantry milling machine, which has been used for many years since the 70s. The main drive of the operating table of the gantry milling machine is selected ...
|
|
Inverter maintenance method - hope sunland
1. Look
After taking over a faulty inverter, remove the inverter shell and clean it up, and carefully investigate the appearance, shape, and integrity of the relevant components on the circuit board with both eyes according to the type of inverter fault. This method is about charging resistors, filter electrolytic capacitors, IG ...
|
|
Anti-interference measures in the application of Sunland inverter
The main manifestations of the disturbance of the inverter in the application are: higher harmonics, noise and oscillation, load matching, heat generation and other problems. These disturbances are unavoidable, because the input part of the inverter is a rectifier circuit and the output part is an inverter circuit, both of which are made up of nonlinear components that play a switching effect.
|
|
Contact
working hours
