When it is required to wiring outside the frequency conversion cabinet, it is generally necessary to use the conduit for wiring, which requires suitable mechanical pressure and unsuitable mechanical damage, moisture-proof and corrosion-resistant. Conduits include the following two wiring methods: 1. Kim ...

Most of the applications of frequency converters (hereinafter referred to as -VFDs) are primarily due to the fact that VFDs can change the output frequency and thus change the speed of the motor. If the frequency of the VFD cannot be adjusted and no damage is found on the hardware, it can be considered that the maximum output torque of the VFD is less than the load progress torque ...

Most inverter brand products can rely on the heat generation of internal electrical components to remove moisture during normal use. If you don't have to do it for a long time, it's easy to get wet. The chip pins, penetrating resistors, capacitors, and inductor pins of the DIP package will be severely rusted or desoldered, resulting in on-resistance ...

The development of the inverter has experienced a slow and gradual process, and the inverter at the beginning of the first century did not choose this kind of AC-DC: communication to DC and then to communication, but direct AC, no central DC link. This kind of inverter is called alternating frequency converter, and now this kind of inverter is in the ultra-high power ...

In the repair of the inverter, we often hear about overpressure problems, but underpressure problems are also common problems encountered in the use of inverters. The reason is that the main circuit voltage is lower than the lower limit caused by the maintenance action or the damage of a rectifier bridge or the instantaneous power failure of the power grid, and the input is flat. Inverter after-sales ...

In order for a VFD to operate reliably for a long time, it is necessary to repair the electronic components in the VFD on a regular basis and replace the primary components of the VFD according to the service life. 1. Cooling fan The VFD power module is the most heat-generating device, and its ...

Now many electrical appliances are advocating the use of small parts, because small parts will not occupy space, and small parts can be moved and overhauled at any time, and the inverter also has a small inverter, how to buy a small fan inverter? Power picking ...

1. Maintenance objectives of overcurrent In the frequency conversion speed regulation system, there are two devices: the frequency converter and the motor. The degree of tolerance to overcurrent is not the same. The planners of the production machinery decide on the capacity of the motor based on the principle of heat. That is, as long as the electricity ...

When it comes to inverter repair, it's not enough to understand the above fundamental circuits, but also to understand the following primary circuits. The main circuit is mainly composed of rectifier circuit, current limiting circuit, filter circuit, braking circuit, inverter circuit and detection and sampling circuit. ...

1. Test preparation: 1. It is necessary to remove all power switches before powering on the PLC control cabinet or IO cabinet. 2. It is necessary to completely cut off the connection between the PLC or DCS card and the outside. All front adapters are to be loosened and raised. 3. Check the power terminal wires and connectors.

Short-circuit maintenance is a function of equipment connected between the power supply and the load, which can effectively disconnect the short-circuit point from the power supply when the load side is short-circuited. If an equipment has a short-circuit maintenance function, it must have a certain short-circuit breaking ability; And a device with the ability to break in a short circuit ...

1. Clarification of the function of the control panel 1. FUN button; Press the FUN button to enter the settings menu F00; 2. Press and hold the up or down button to scroll to the code you need to set; 3. At this moment, press the FUN button to confirm, and adjust the entry parameters to the required value; 4. After the adjustment is completed, ...

Generally, most motors start to speed up from 0Hz, but in some special cases, it is necessary to start directly from a certain frequency. At this time, the frequency output of the VFD at the moment of activation is the activation frequency. In general, you need to set the activation frequency in the following situations. ...

F09 second acceleration time 0.10 - 999.9sec; 5.0sec； △** The acceleration and deceleration parameters and the second acceleration and deceleration parameters are switched by terminal X3 (see F55); F10 second deceleration time 0.10 - 999.9sec; 5.0sec； △**Acceleration and deceleration parameters and the second acceleration and deceleration parameters are switched ...

The basic principle of vector control is to control the excitation current and torque current of the asynchronous motor according to the principle of magnetic field orientation through the measurement and control of the stator current vector of the asynchronous motor, and then achieve the purpose of controlling the torque of the asynchronous motor. Specifically, the stator of the asynchronous motor ...

The lightning protection measures of the inverter equipment are another important peripheral measure to ensure the safe operation of the inverter, especially in the area where lightning is active or in the lively season, this problem is particularly important. Today's inverter products are generally equipped with lightning ...

1. Connect X (switching input) drive terminal to control the inverter start-stop/positive rotation; 2. Connect to the AI (analog input) terminal to control the frequency of the inverter (perhaps made into PID closed-loop control automatic adjustment frequency) ​ 3. ...

1. Phenomenon (1) When starting from the beginning, it trips as soon as the speed is raised. This is a very serious phenomenon of overcurrent. The main reasons are: short circuit of load, stuck mechanical parts; The inverter module is damaged; The torque of the motor is too small. (2) Jump when powered on, this phenomenon generally can't ...

1. Energy consumption braking: The energy consumption braking method uses the braking resistance set in the DC circuit to absorb the regenerative electric energy of the motor through the chopper and braking resistor, so as to realize the rapid braking of the inverter. 2. Feedback braking: feedback system ...

Installing a variable-frequency drive (VFD) on the power frequency motor can complete the precise control and speed regulation of the motor, and improve the power and accuracy of the progressive motor. However, if it is not properly used and used, the following damages may occur: ...

a. Output frequency scale. The output frequency scale that can be controlled by the general inverter, the lowest starting frequency is generally 0.1Hz, and the highest frequency is different according to the functional indicators of the inverter, generally 400Hz, and some models are 650Hz. No matter how high the output frequency is, it depends on the scale of the high-frequency inverter. ...