What are the applications of frequency converters in energy saving? This is the relevant question we want to tell you in this issue. The answer to this question is in the following explanation:

1.Motor speed regulation

Frequency converters have made great progress in energy saving, from no speed regulation to current speed regulation. The motor speed regulation of frequency converters accounts for a very large share of all power consumption. In the past, energy saving was achieved by reducing flow and controlling wind energy, but the effect was far less effective than direct frequency conversion. After such changes, the cost savings have increased greatly.

2.Wind power generation combination

In the past, household inverters used pure electricity, which could ensure stable power supply to the machine and was easy to control. However, as we all know, wind power is a difficult energy source to control, and the inverter has high requirements for power stability, so a combination of wind power and electricity is used to ensure power stability. This is also a new type of environmentally friendly power source, which also plays a big role in energy saving.

3.Changes in current

In the past, AC to DC was widely used, but DC motors had many maintenance problems, which would lead to many failures. Nowadays, with the mature application of switching equipment, AC-DC-AC mode is widely used, which reduces most of the failure problems and achieves energy-saving effects.

Daily inspection and maintenance of frequency converter

During the regular inspection of the inverter, please cut off the power supply, stop the inverter, and remove the inverter cover. Mainly check the places that cannot be checked without stopping the operation or the places where problems are difficult to find in daily inspections, as well as the inspection and adjustment of electrical characteristics.

After the vector inverter is powered off, there is still a high charging voltage on the filter capacitor of the main circuit. It takes a certain amount of time to discharge, usually 5-10 minutes. Before starting the inspection, you must wait for the charging indicator to go out and use a voltmeter to test to confirm that the voltage is lower than the safe value of 25V DC.

1：Check whether the cooling system is normal and clean the dust on the dust screen.

First, clean the internal parts of the inverter. Use a vacuum cleaner to suck up the internal dust. Use a soft cloth to wipe things that cannot be sucked. Since dust and foreign matter may fall in during operation, it should be cleaned from top to bottom. The leads of the main circuit components, the insulated terminals, and the ends of the capacitors should be carefully wiped with a soft cloth. The cooling fan system and air duct should be carefully cleaned to keep the inside of the inverter clean and the air duct unobstructed.

2：Vector inverter Check if the connection on the control circuit board is loose, if the capacitor is leaking, if the line on the circuit board is rusted or broken, etc. Usually, the actual capacity of the capacitor on the control circuit cannot be measured, and its performance and life can only be inferred based on its surface condition, working condition and surface temperature rise. If there is no abnormality on the surface, it can be judged as normal. Check the resistors, inductors, relays and contactors on the control circuit, mainly to see if there are loose or broken wires, whether the terminal blocks are damaged, and whether the contacts are rough.

3：Due to the temperature rise and vibration during the operation of the inverter, the terminals and leads of the main circuit components and control circuits often become loose, resulting in corrosion, oxidation, poor contact and disconnection. Therefore, it is necessary to check whether fasteners such as screws and bolts are loose, and tighten them as necessary. For welded parts and crimped terminals, check for corrosion, discoloration, cracks, breakage, etc. In addition, check whether the frame structure is loose and whether the conductors and wires are damaged.

Guangdong Dingshen Electric Technology Co., Ltd.'s main products include inverters, vector inverters, high-performance inverters, economical inverters, etc. Founded in 2014, the company is a high-tech enterprise that focuses on the independent research and development, manufacturing, design, sales and service of motor controllers and industrial automation controllers. The company has a loyal and high-level cooperative team. The team has rich field experience and problem-solving skills, solid product design and development skills, innovative, open and free R&D team atmosphere, many years of automation industry service experience, a deep understanding of customer needs and industry development trends, and a strong combination with distribution channels to serve customers in real time.