Introduce the inverter technology of electric fans

Frequency conversion technology was born in response to the needs of stepless speed regulation of AC motors. But it's just that the electric fan shouldn't have been used yet, and it's probably because of the ** problem. In the 70s, there were common induction cookers, inverter lighting appliances, inverter air conditioners, inverter microwave ovens, inverter refrigerators, IH (induction heating) rice burgers, inverter washing machines, and in the 90s, household appliances relied on inverter technology, mainly aiming at high function and power saving.

I guess you mean the inverter technology used in the fan in the air conditioner?

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Back upstairs, the flashlight is powered by a stabilized voltage power, which is feasible. Now many flashlights have gradually considered the use of stabilized power supply, mainly military products, civilian flashlights are still not popular due to the most advanced factors.

Do electric fans also have inverter technology?

I heard that there is an inverter air conditioner.

If the electric fan still needs to use inverter technology, does the flashlight need a regulated power supply?

The principle of frequency conversion technology is simple, that is, to adjust the speed of the motor by changing the frequency of alternating current, so that there is no need for mechanical reducer, and stepless speed change can be realized, but due to cost problems, it was only for military use in the early stage, and then entered the civilian field.

From an economic and structural point of view, it is impossible for an electric fan to use inverter technology, which is called "taking off the pants FP" or "painting snakes".

What is the difference between inverter fans and general fans: inverter fans are ultra-silent, more power-saving, more beautiful, and ultra-intelligent.

1. The inverter fan has DC and AC inverter, which electronically adjusts the voltage or current to change the wind speed, and the functional normal wind, natural wind, sleep wind, and intelligent wind are all realized by adjusting the voltage or current by the control chip.

2. Generally, the fan only changes the coil winding on the fan to achieve the purpose of changing the wind power.

3. The biggest advantage of the inverter fan is that it is silent, and secondly, it is relatively more power-saving, energy-saving and emission-reduction, the inverter fan has stable air supply, and the biggest feature of the inverter technology is that it runs smoothly.

When the ordinary fan is running, the noise is very large, the sound of frequency conversion is very small, and the safety performance is also relatively good; And there are several wind types such as normal wind, natural wind, sleep wind, and intelligent wind to choose from. The most important thing is that you can make an appointment to turn on and off, which ordinary ZD fans can't do. These are my experiences with inverter fans at GOME.

The biggest advantage of the inverter fan is that it is silent, and secondly, it is relatively energy-saving, and the wind blown by the inverter fan is softer than that of ordinary fans.

The most important thing is the inverter motor inside, the inverter motor is more power-saving, and there are many gears and super quiet.

1. Working principle:

The working principle of the DC cooling fan: through DC voltage and electromagnetic induction, the electrical energy is converted into machinery to drive the fan blade to rotate, relying on the coil and IC to continuously switch, and the induction magnetic ring drives the fan blade to rotate.

The working principle of AC fan: driven by AC power supply, the voltage will be positive and negative alternating, and it does not rely on circuit control at all to generate a magnetic field. The frequency of the power supply is fixed, and the speed of change of the magnetic poles produced by the silicon steel sheet is determined by the frequency of the power supply, the higher the frequency, the faster the magnetic field switching speed, and the faster the rotational speed will theoretically.

However, the frequency should not be too fast, as too fast will cause difficulty in starting.

2. Structural composition:

The rotor of the DC cooling fan includes the DC cooling fan blade, which is the source of air flow and the fan shaft, which is used to support the rotation of the balanced fan blades, the rotor magnetic ring, the permanent magnet, the key to promote the magnetic level switching speed, the magnetic ring outer frame, and the fixed magnetic ring. In addition, it also includes supporting springs, through which the nodules are fixed to rotate the entire part, the motor part, the direction of rotation is produced, and the rotation speed is key to the size of the movement. Its speed regulation performance is good and the control is simple.

The internal structure of the AC fan (single-phase) is composed of two coil windings, one is the starting winding, these two windings are connected in series with each other, so that three points are formed, the series connection point is the common end, the end of the starting winding is the starting end and the end of the running winding is the running end, in addition, a starting capacitor is also needed, usually the capacity is between 12uf, the withstand voltage is usually 250V, there are two joints, one end is connected to the end of the starting winding, and the other end is connected to the end of the running winding, forming a triangle, power supply (there is no need to distinguish the zero line of the live wire.) One is connected to the end of the running winding (i.e., it is also connected to one end of the capacitor), the other is connected to the common end, and the ground wire is connected to the motor housing.

3. Material characteristics:

DC cooling fan material: It is made of alloy material, the life can be used continuously for more than 50,000 hours, and the DC internal structure has a transformer and a main control board (including frequency conversion circuit, rectifier filter, amplification circuit, etc.) that will not be affected by voltage fluctuations, so its service life is longer.

The internal structure of the AC fan is mainly based on the transformer, and most of the AC fans are selected from the domestic discharge needle, which is generally tungsten needle or stainless steel, if the voltage fluctuates too much, it will affect the service life of the transformer.

I recently bought an inverter fan, the reason is very simple, I chose to buy an inverter at that time, the noise is low, and more importantly, it is energy-saving. A small desktop inverter fan costs more than 200 yuan, and an ordinary fan only costs a few dozen yuan, but in the long run, the inverter fan is more energy-efficient and can save electricity bills. I bought it to use when I sleep at night, unless the weather is really hot, there is no need to blow the air conditioner at other times, the air conditioner blows too much, and it is not good for the body.

In the past two days, my colleague saw a small fan on my desk, which was not an inverter, only more than 20 yuan a piece, my handsome guy bought it a few years ago, they said that the noise was small, and they also wanted to buy one, I said that it was good to buy a inverter fan directly, a colleague who wanted me to have a small fan and another colleague who came to interject (did not plan to buy any fan), all said that it was not necessary, and felt that it was more expensive, and one of the colleagues still had a disdainful attitude. They are not a person of the same ideological level as me, they will only look at the present, and ignore the long-term, which is exactly the same as their attitude towards work, they do not take their work very seriously, they are responsible for their own work, and they lack strong self-motivation. A person's cognitive abilities, as well as a person's vision, can really determine many things, including careers.

This trip is not terrible, but what is even more terrible is that I am not aware of my own problems, and I think other people's ideas are ridiculous and funny, and I disdain other people's ideas.

Readers and friends, you should always remember to look at the problem and look at the long-term, don't look at the rat, so that life can be better. You can also leave a message to share what you think you think you are considering from a long-term perspective, so that we can learn and learn from each other and grow together.

The fan contactor can be controlled by the inverter output relay or the 24V relay can be driven by the analog output of the switch, as long as the inverter start signal is set in the corresponding settings.

The electric fan is used to generate wind to dissipate heat from the motor, and the heat dissipation effect can only be fully exerted when the fan speed reaches the rated speed. If it is connected in parallel with the motor, then the power supply frequency may be in a small range according to the speed of the motor under the action of the inverter, then the fan can not reach the rated speed, the heat dissipation effect of the motor is very poor, and even the heat dissipation effect cannot be achieved, if the heat of the motor can not be dissipated, the temperature rise of the motor will increase and there is a risk of burning the motor, so the motor with the fan can not be controlled with the motor with the inverter.

German Lawson fan.

Inverter heat dissipation is important.

I've seen one.

The back plate is designed with a large air duct.

It works well. Maintenance is larger.

The working principle of AC inverter air conditioner is: inverter technology is a technology that changes the frequency of the power supply through the inverter, thereby changing the speed of the compressor, and first converts AC to DC through the inverter, and then converts DC to AC through the inverter, so as to control the speed of the AC motor. The control of the inverter is to transmit the indoor temperature information to the microcomputer through the sensor, and output a waveform with a certain frequency change to control the frequency of the inverter.

When the indoor air conditioning is rapidly cooled down or heated up rapidly, the indoor air conditioning load increases, the compressor speed increases, and the refrigeration capacity increases proportionally, on the contrary, when the indoor air conditioning load decreases, the compressor runs normally or decelerates.

The working principle of the chain of DC inverter air conditioner is to convert the 50hz power frequency AC power supply into DC power supply and send it to the main circuit of the power module, and the power module is also controlled by the micro-electric beat brain, the difference is that the module outputs a DC power supply with variable voltage, and the compressor uses a DC motor, so the DC inverter air conditioner can also be called a full DC variable speed air conditioner. DC inverter air conditioners do not have an inverter link, which is more energy-efficient than AC inverter in this regard.