The starting capacitor of ceiling fans is generally 2--2.5uF, and that of ordinary floor fans is generally 1.5uF (lower power). This has to do with power and speed. It is best to check how much it originally matched. Normally, if the capacity becomes larger, the rotation speed becomes faster, and the temperature rise also becomes higher. If the capacity exceeds too much, it is easy to get hot.
Electric fans usually use 1.2-1.5uf capacitors. Ceiling fans are divided into industrial ceiling fans and decorative ceiling fans, which are called ceiling fan lights overseas. Most homes and factories in the country use industrial ceiling fans.
Industrial ceiling fans occupy a major position in China, and related manufacturers mainly include Oaks, Hemisphere, Diamond, Far East, Mei, Great Wall, Ricai, Hongxing, Shule, etc. The main sizes are 1050mm, 1200mm, 1400mm. (900mm and 1500mm ceiling fans are rare in the domestic market, and decorative ceiling fans are mainly overseas (mainly in the United States, the US government recommends installing ceiling fans in air-conditioned rooms)) as auxiliary appliances for air conditioners. Decorative fans are beautiful in appearance, mostly with blades and lights of different colors and designs, generally using a remote control.
The decorative ceiling fan in use has a lower speed than traditional industrial ceiling fans, small air volume, and can rotate forward and reverse. Its function is mainly to adjust the air flow. According to foreign reports, decorating a ceiling fan in an air-conditioned room saves 15%-35% energy than not using a ceiling fan.
The capacitor of the electric fan is generally about 1.2~2.5 uf, and the specific situation is determined by the power and speed of the electric fan. If it is a decorative electric fan used at home, you can choose a capacitor of 1.2-1.5, which has a small rotation speed and a small air volume, which can adjust the air flow in the room. However, when using an industrial ceiling fan in a factory or office, you can choose a capacitor of about 2.5uf, which has a fast rotation speed and a large air volume. When replacing capacitors, you need to choose products with the same specifications. After all, its size affects the use of a ceiling fan. If the capacitor is too large, although it starts quickly, the current through the motor is very large and the temperature rises very high, which will not only shorten the life of the motor, but also burn the motor. Conversely, too small capacitors cannot be selected.
What is the difference between an industrial electric fan and a general household electric fan? In fact, industrial electric fans and ordinary household electric fans are the basic principles of the same electrical equipment, and there is no obvious technical difference between the two. However, in terms of business scale, industrial ceiling fans are much larger than household cooling fans. It's clearly felt. For example, the speed of household electric fans is generally 320r/min, but the operating exhaust volume of industrial large ceiling fans is 13800M/min. In terms of processing technology, the fan blades of industrial electric fans generally use aviation magnesium-aluminum alloy materials. The material has the advantages of low relative density, high compressive strength, large elastic modulus, good heat dissipation, good shock resistance, and the working ability of anti-shock load exceeds that of magnesium-aluminum alloy profiles, and is resistant to organic compounds and alkali corrosion. The impellers of ordinary household electric fans are made of iron or plastic, and the quality is much smaller than that of large industrial ceiling fans.
The electrostatic capacity of electric fans varies according to the size of the motor, there are 1 microfarad and 2 microfarads, generally 2 microfarads, and the starting electrostatic capacity of electric fans is usually 2~2.5uF.
The general motor power is 65-100W, and the withstand voltage suitable for 2~4uf capacitors is preferably 650V. 80W ceiling fans are recommended to use 3uF/400v starting capacitors, 1.2~1.5UF capacitors can also be used for 30w~60w electric fans. Single-phase ceiling fans are mostly capacitor-run motors, which have been involved in operation since the fan was started. That is to say, in regular charging and discharging, the larger the capacity of the capacitor, the greater the charging and discharging current, the greater the electromagnetic energy generated, and the faster the fan rotates. At this time, if the fan speed is higher than the normal speed, the wear of the fan increases, the heat generation also increases, the life span is shortened, and the power consumption does not increase.
