1. Outstanding frequency conversion speed regulation characteristics Completing the frequency conversion speed regulation of asynchronous motor is the "century wish" that people have been waiting for since the creation of asynchronous motor for 100 years. Through unremitting improvement, enhancement and perfection, the speed regulation function of VFD is not bad, that is, compared with the DC speed regulation system, the part ...

1. Maximum frequency fmax, reference frequency fN and reference voltage UN 2. The upper frequency fH and the lower frequency fL The output frequency of the inverter is limited to the upper and lower limit frequencies to prevent errors in the event of misoperation. 3. Frequency of activation When the signal ON is activated, the ON ...

Inverter is an important drive material in modern industrial production, as a power equipment, it is working hard all the time, so its fault rate is very high, and the rapid processing of inverter faults, to ensure the continuity of industrial production, is every maintenance electrician and on-site debugging of electricians.

When the main circuit of the inverter is connected to the power line, in order to control the operation of the motor, it is also necessary to connect the relevant terminals to the peripheral control circuit, and set the parameters of the inverter's starting method to the external operation form. The inverter controls the motor to run, and there are two common methods, which are to turn on the ...

As for the use of vector-operated motors, it can be divided into two categories, namely non-reactive vector control (SVC) and reactive vector control (FVC). Vectorless Handling (SVC): Due to the speed response, additional equipment for the encoder is installed in the motor dragged by the inverter, which is cumbersome. Here...

The overvoltage of the inverter is manifested in the tributary voltage of the DC bus. Under normal conditions, the direct current of the inverter is the average value of the three-phase full-wave rectification. If calculated by 380V line voltage, the average DC voltage Ud=1.35U line=513V.

1. Look: The normal operation of the motor has a great relationship with the surrounding environment. Therefore, during the daily inspection, check the water leakage and dripping conditions around the motor (which will cause the low insulation of the motor to form a breakdown and cause burnout), and check whether the peripheral of the motor affects its ventilation and heat dissipation ring.

1. The power supply should be connected to the R, S, and T terminals at the input end of the inverter, and must not be connected to the output terminal (U, V, W) of the inverter, otherwise the inverter will be damaged. After wiring, it is necessary to clean the trivial wires, which may cause abnormalities, failures and problems, and it is necessary to always keep ...

The DC reactor for the inverter is also called the flat wave reactor, which is connected in series in the DC bus (terminals P1 and P+). The main thing is to reduce the higher harmonic component of the input current and improve the power factor of the input power supply (to 0.95). This reactor can be used at the same time as the AC reactor, and the inverter has high power ...

1. Maintain the inverter from the damage of regenerative electricity In the process of rapid shutdown of the motor, because of the inertia, a lot of regenerative electric energy will be generated, if this part of the regenerative electric energy is not consumed in time, it will directly act on the DC circuit part of the inverter.

1. The inverter can adjust the power of the motor and complete the variable speed operation of the motor, so as to achieve the purpose of saving electricity. For example, it is reflected in the centrifugal fan and water pump, when the centrifugal fan and water pump use the frequency converter, the operator can convert the frequency to regulate the speed, and can easily control the flow rate according to the need, so as to save ...

1. Download the control program. 2. Put the inverter in open-loop experimental mode and set the appropriate parameters. 3. Connect the incoming cable of the inverter. The cable on the output side of the inverter is not connected. 4. Push the high-voltage cabinet to the experimental position, close the switch, and ...

AC asynchronous motors are widely used in all walks of life, and frequency converters and power frequency power supplies are often required to switch in the selection of frequency conversion speed control system. The primary types of switching are: fault switching and multi-machine system switching. In the process of operation of many production machinery, the motor is not allowed to stop ...

The fundamental method of motor protector selection At present, there is no unified standard for motor protectors on the market, and almost every manufacturer has its own type standard. In order to meet the needs of different customers, manufacturers derive many products with different uses, and a wide range of products for the majority of users to choose ...

(1) When the inverter is connected to the power grid of large-capacity power transformer (more than 500kVA), perhaps the same power transformer is connected with a thyristor converter without using a commutation reactor, or when there is a switching capacitor bank for power improvement in the same power grid, an AC reactor or DC reactor should be equipped.

1. Wiring of fire emergency lighting Generally, the flame retardant wire is used to wear the metal pipe and the thickness of the protective layer is ≥ 30mm.

The inverter is an electric power control equipment that uses frequency conversion skills and microelectronic skills to control the AC motor by changing the power supply frequency of the motor operation. It is used in a wide range of fields, including conveyors, feeders, mixers, grinders, pulverizers, paper cutters, calenders in various industries...

Due to poor contact of network connectors, or due to disturbance and other problems, DP networks that have been used for a long time may show a "transient disconnection" situation, that is, occasionally disconnected instantaneously, and quickly recover to normal. If OB86 is not downloaded, the CPU will stop during a transient outage. Now all over the option to download a ...

The two wires are connected to the resistor, and the other wire is connected to the adjustment terminal. The red thread is attached to the blackhead and inserted in a small hole. Connect both ends of the IR potentiometer to +10V and ACM, and slide the termination to the voltage input terminal AVI. ...

When the line power supply exceeds the driver's kV-A rating by 10 times, add a line reactor. A 3% impedance line reactor should be used to reduce power line transients caused by capacitor switching, line notching, DC bus overvoltage tripping, and inverter overcurrent and overvoltage conditions. Line...

Due to the short circuit of the load, the failure of the self-oscillation circuit and the loss of control of the protection circuit, the switching power supply will cause the base of the switch tube to be unable to get the switching pulse and intermittent operation, which makes it difficult to locate the shortcomings of SMPS. The difficulty of the repair operation and the improper method will expand the shortcomings, constituting the phenomenon of continuous burning of the switch pipe, etc., ...