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4 Ways Integrating Variable Frequency Drives Can Benefit Your Facility
Nov 08 , 2021

Variable frequency drives (VFDs) have most commonly been used in water treatment plants, where they’re used to regulate water flow. But in recent years, they’ve grown in popularity throughout many areas of the industry. Integrating a VFD into your automation system can provide numerous benefits. These include process optimization, increased motor life, energy savings, and time savings. 1. Process ...

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Notes on VFD Warranty
Jul 22 , 2022

Importance of Warranty When shopping for a low-voltage variable frequency drive (VFD), be sure to review the warranty for each option you consider. You may wish to never need a warranty, but when a defect occurs, warranties are good and they can help you repair or replace your device. Below are some of the biggest considerations and mistakes common to customers that lead to VFDs being rejected in ...

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Mistakes that reduce the life of your VFD
Jul 22 , 2022

The environment in which the drive is stored should be kept cool, clean and dry. But what if you already have a VFD? When talking to one of our field engineers about a customer who has a VFD, I asked what was the biggest mistake made while maintaining this equipment? Based on all the advice he gave, I would like to remind you that only qualified personnel should work on electrical panels. Also, th...

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How to choose a variable frequency drive?
Aug 21 , 2022

The variable frequency drive generally chooses a 4-level motor, the base frequency operating point is designed at 50Hz, the frequency is 0-50Hz (speed 0-1480r/min) The motor runs at constant torque, and the frequency is 50-100Hz (speed 1480-2800r/min). The motor runs at constant power within the range of min), and the entire speed regulation range is (0-2800r/min), which basically meets the requir...

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What causes the variable frequency drive to heat up?
Aug 21 , 2022

When the variable frequency drive is working, the current flowing through the variable frequency drive is very large, and the heat generated by the variable frequency drive is also very large. Below, I will introduce to you the two main reasons and solutions for the heating of the variable frequency drive of the special machine: 1. The problem of the variable frequency drive and the motor itself; ...

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Common interference methods and processing of frequency converters
Aug 29 , 2022

Common inverter interference methods are: conduction interference, coupling interference, radiation interference. Anti-interference measures: For the interference signal transmitted by radiation, it is mainly weakened by wiring and shielding the radiation source and the line to be interfered. For the interference signal transmitted through the line, it is mainly dealt with by adding filters, react...

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Which parts of the VFD need to be replaced regularly
Aug 29 , 2022

When we are using VFD, we must be familiar with the basic working principle and functional characteristics of VFD. Before the inspection and maintenance of the frequency inverter, the main power supply of the equipment must be cut off; and the Variable Frequency Drive indicator light must be completely extinguished. Daily inspection items: Before powering on the VFD, check the temperature and humi...

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Protection function of frequency drive
Nov 29 , 2022

VFD is a control device that uses frequency conversion technology and microelectronics technology to control AC motors by changing the frequency of the motor's operating power supply. Vfd inverter is mainly composed of rectification (AC to DC), filter, inverter (DC to AC), braking unit, drive unit, detection unit, micro-processing unit, etc. VFD provides the power supply voltage it needs by turnin...

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The composition of general purpose VFD
Dec 06 , 2022

Frequency conversion speed regulation is to change the synchronous speed of the rotating magnetic field by changing the power supply frequency of the motor stator. It is an efficient speed regulation method without additional slip loss. The outstanding advantages are high speed regulation efficiency, low start-up energy consumption, wide speed regulation range, stepless speed regulation, fast dyna...

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Fault Analysis of Frequency Converter Overvoltage
Dec 06 , 2022

During the operation of the vfd drive, due to different operating conditions, the voltage may fluctuate greatly. When the intermediate DC circuit overvoltage occurs, it will have a great impact on the normal operation of the vfd drive, and even damage the equipment. , Causing casualties, the overvoltage phenomenon generated by the vfd drive usually refers to this type of overvoltage. First, the ov...

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Troubleshooting method for variable frequency inverter overvoltage
Dec 06 , 2022

The previous article focused on the analysis of variable frequency inverter overvoltage faults, and this article focuses on some processing methods. 1. Input side processing method Since there is an impulse voltage on the input side, it will usually lead to an overvoltage fault of the variable frequency inverter. Therefore, before the lightning strike and the change of the compensation capacitor s...

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Can variable frequency drive run in parallel?
Dec 19 , 2022

It turns out that a 7.5KW frequency converter drives a 7.5KW belt motor. Due to technical reasons, the power of this 7.5KW motor needs to be increased to 15KW. The original frequency converter is no longer specified, and the power is too small! So, is there any good solution? Some people will think whether the variable frequency drive can run in parallel like a transformer? That is, two 7.5KW vari...

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