How to check the fan using a multimeter

How to check the fan using a multimeter

Any electronic circuit consists of semiconductor elements. The most common of them transistors. Although recently, the elements produced are characterized by reliability, but still violations in the operation of electronic devices can lead to damage to the semiconductor.

Before checking the transistor by a multimeter, it is not necessary to fall out of the diagram, but to obtain accurate results it is better to do this.

Program check

Make sure that the fan works can be without the use of special software. It is enough to bring the hand to the opening of the cooling system on the body, loading the system before this. Try, for example, to start a resource.Intensive game. The noise from the work of the cooler will tell you that the laptop is trying to cool the components.

If the fan does not cope with the load, and the component overheats, then the laptop can freeze or turn off on its own. This is how the system of preventing overheating works, but if it had to join the case, then the case with the cooler is very bad, and it is urgent to clean it or change it. But this is how only the fact of the fan operation of. Is it functioning well, you can find out through the Speedfan program.

It is not necessary to change the tongue: Speedfan with the help of icons will clearly demonstrate which components are warming within the norm and which have too high temperature. For example, in the above example, the cooler does not cope with the cooling of the processor, so the fire icon next to the CPU.

check, using, multimeter

Try to fix this using the Speedfan program by increasing the speed of the laptop fan. Find the cooler utility in the lower part of the main window, which is responsible for cooling CPU. If it does not work 100%, increase its power to check whether the processor temperature will subside. If even at maximum speed the fan cannot provide normal cooling of the laptop component, it is necessary to determine what is the reason for the laptop overheating.

Which electric motors can be checked by a multimeter?

There are different modifications of electric engines, and the list of their possible malfunctions is quite large. Most problems can be diagnosed using the usual multimeter, even if you are not a specialist in this area.

Modern electric motors are divided into several types that are listed below:

The first stage of any diagnosis is visual inspection. If even the burned windings or the broken parts of the motor are visible with the naked eye, it is clear that the further check is meaningless, and the unit should be taken to the workshop. But often the inspection is not enough to identify problems, and then a more thorough check is needed.

The engine of the floor fan

Inside the fan there is an asynchronous engine with the regulation of the speed of rotation of the shaft by switching windings. The capacitor is attached to the gearbox. The radio element is not a starting. We believe that it is not for nothing that four in two rows are attached, shifted relative to each other to the eighth of the turnover. Field rotation uses a voltage phase and a shift of 90 degrees. The moment is useless, one winding of the asynchronous engine of the floor fan will burn, you will have to change the motor. It is not possible to wound a complex product on your own.

The speed control is performed by switching voltage to the corresponding wires by switching buttons on the rack. One core goes from the cord from the outlet to the engine, and the second position is selected by the operator. Only one of the speeds are pressed simultaneously, which is provided by mechanical methods for blocking parallel inclusion. Conducted by Krasnodar products by the presence of backlight: the upper button provides the burning of the diode. Will avoid a collision in the dark with a floor fan. Indirectly testifies: the manufacturer is in the know about the instability of the product.

The engine is compiled by an isolated silumin-drum rotor, the coil wiring was covered. The structure remains unknown for obvious reasons, the question is deprived. We believe that the probability of failure of the rotor is relatively small, the anchor receives the nutrition of the stator. The structure is usually represented by a squirrel cell. A set of longitudinal conductors located in a circle united by two rings from the ends. From both ends, there is a impeller blowing the coils of the stator on the rotor. Will allow an asynchronous engine to work more intensively. The Krasnodar floor fan has plastic impeller.

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In case of ambiguities, call the wiring from the button (without disassembling the fan), exploring the hidden malfunction. The resistance of the working winding is not zero, too high. The cliff is not difficult to guess. The starting winding calls from the condenser contacts. The direction of rotation is determined by the mutual position of the launch and main windings, therefore, having mixed up in places, get the wrong result.

Of course, when at least one winding fails, the engine will not work. One phase is not enough to accelerate the rotor. Make up, following the clockwise, the blades (pulling your hand) to understand the presence of a characteristic malfunction. The floor fan will work. One winding burned. It is incorrect to talk about starting, working coils, copper skeins are identical. The capacitor engine.

How to check ceiling fan का connection multimeter से कैसे check किया जाता है

DIY fan repair

Signs of malfunction of the mechanical part of the fan are:

  • Extraneous noise during work;
  • A decrease in the speed of rotation, while the rotation of the shaft of the turned off the device with the hand occurs with effort;
  • A complete stop, at which the rotation of the fan shaft is impossible or requires significant efforts.

Electric faults include:

  • Triggering protective devices (circuit breakers) when the fan is turned on;
  • Smells of burned or overheated insulation during operation;
  • Decrease in rotation speed during free rotation of the shaft of the device off;
  • Interruptions in the work when changing modes.

Untimely eliminated mechanical malfunctions progress in development and lead to electrical problems. Long.Term operation of the fan with jamming on the shaft leads to overheating and failure of the winding of the electric motor. The crazy bearing allows the engine shaft to move in the radial direction, which lead to damage to the stator windings.

Therefore, if signs of malfunctions are found, you need to immediately engage in its elimination.

A desktop fan device

How to Check Capacitor ? Ceiling Fan, Table Fan, Motor, AC, Cooler etc | Test Smd Without Multimeter

How to check the cooler on a laptop: software and hardware performance test

The correct operation of the cooling system extends the life of the computer for a long time. In the presence of problems, the details begin to overheat and fail. If the technique began to “slow down” or began to heat up hard, then first of all, the cooler on the laptop should be checked for the performance.

Program check

The easiest way is to find out the cause of the problems and eliminate their consequences using programs.

Many BIOS devices affect the activity of the cooler. This is especially true for expensive laptops, although there are exceptions.

IMPORTANT! If you have Acer or MSI laptops, you should look at this method.

Turn off the device and turn on again. As soon as the download screen appears, enter the BIOS menu. This can be done using the Del, F2 or ESC keys. The combination depends on the model of the purchased device.

Entering the main menu, select the Power tab responsible for the temperature of the processor and cooler. Now you need to find the CPU Q-Fan Control and CPU FAN Profile. It is important that the first indicator is active. The second parameter is responsible for the intensity of the fan rotation:

  • Silent. The minimum charge is spent;
  • Optimal-the cooler will begin to turn on at the time of increased load on the laptop (often it happens when the online game is launched);
  • Turbo. Continuous operation of the cooling system.

For Lenovo owners, this advice may be irrelevant.

With the help

You can not go to the BIOS menu and solve the potential problem in the usual way. This will require only the Internet and the name of the desired program.

Speedfan is an excellent application that allows you to determine the performance of the cooler. Download it from the official source and install it on your PC.

As soon as you run the program, you will see what temperature on the sensors. It will also be possible to manually change the speed adjustment setting. To do this, remove the flag opposite the “Auto.Fan Auto” and write the necessary rotation speed calculated as a percentage.

If a fixed number of revolutions is not suitable due to strong overheating, you can change the data in the “Configuration” section. The utility is automatically adjusted to the selected value.

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Another useful application is AIDA64. It is preferable to use it to those who are fond of heavy games, especially online.

If the temperature does not exceed 50 degrees, then the cooler works properly. Excess of this border indicates existing problems.

Coiler hardware check

You can use a more difficult way. Hardware check. To do this, you have to disassemble the laptop and diagnose the cooler manually.

Before extracting the fan, be sure to study the instructions. If the warranty period is not yet expired, it is extremely not recommended to disassemble the laptop on your own. The best solution in this situation is to appeal to professionals.

With a reluctance to visit the service center, you can make an independent attempt to diagnose. It is important to know that there is no need to completely extract the cooler. Only wires for testing on another device will be needed.

This will require USB, which on one side has a plug, on the second. Black and red wires. Adhere to such an algorithm of action:

IMPORTANT! If the fan began to rotate, then everything is in order with it. Perhaps you just need to clean the cooling system or replace thermal grease.

To get rid of pollution, it is not necessary to resort to the extraction of the cooler from the laptop body. It is enough to blow it with a spray with compressed air (in extreme cases, a vacuum cleaner will also fit). If there is too much dust, you can use a brush to remove it.

Then wipe the laptop with napkins or a cotton wool moistened in alcohol. This will increase the performance of the device even in the absence of a hardware problem.

If the above methods did not give a result when an independent check of the cooler for performance, take your laptop to the service center. Professionals will certainly cope with the problem that has arisen!

Checking the fan electric motor

Let us consider in detail. How the fan motor is being checked. An example is an electric motor corresponding to the version of household desktop fans.

The photograph shows a small electric motor photo of a desktop fan. To state this topic more understandably, the clarification will be accompanied by personal photographs. For the diagnosis of the electric motor.

Diagnostics of electrical connections begins with preliminary verification directly by the device itself

Why is such a check is needed?. The verification is carried out to be convinced that the wires of the probe of the device do not have a gap. That is, in practice, such a malfunction of the device as an open wire in conjunction with the probe is a metal pin in conjunction with the wire.

When a break, for a certain section of the electrical circuit, the display of the instrument multimeter. Shows “unit”. If two probes of the device are closed together at the same way with the displayed range of the lowest resistance. The display of the device will show the zero resistance value. For this example, this will mean that the device acting is working.

Capacitor capacity checking a multimeter

Let’s start by checking the capacitor consisting in the electrical circuit of the electric motor photo

Here we can clearly see that the capacity on the capacitor housing is:

To check the capacitor for the presence of a capacity of the photo, you need to disconnect it from the electrical circuit to cut off the wires with scissors. Previously, before measuring its capacity, it is necessary to discharge the capacitor to close the condenser contacts adoply and then measure the measurement.

For this capacitor capacitance, the device is installed in the range from 200 nanopharad to 2 microfarade, since the capacitance of the capacitor is 0.51 microfarade and the set range corresponds to our measurement.

Let’s check it

In the article I will use improvised tools, the use of which can afford the most obvious humanitarium. If the house contains measuring devices, such as a multimeter, you will not find anything new below in the text.

  • The mechanism is stained, something interferes physically
  • It should not spin, because there is no control signal for rotation (the system believes that the temperature threshold is not reached)
  • Lack of an electric signal on the fan itself

How to check the work of the cooler on the processor?

This can be done using the Del, F2 or ESC keys. The combination depends on the model of the purchased device. Entering the main menu, select Power tab. Responsible for the temperature of the processor and cooler. Now you need to find the CPU Q-Fan Control and CPU FAN Profile.

  • Enter the BIOS and open the “Power” section.
  • Next, go into the HW Monitor Configuration settings, it sets up the fan.
  • Find the option with the “FAN Speed” value and select the fan speed, it is indicated as a percentage.

Capacitor capacity checking a multimeter

Let’s start by checking the capacitor consisting in the electrical circuit of the electric motor photo

Here we can clearly see that the capacity on the capacitor housing is:

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To check the capacitor for the presence of a capacity of the photo, you need to disconnect it from the electrical circuit to cut off the wires with scissors. Previously, before measuring its capacity, it is necessary to discharge the capacitor to close the condenser contacts adoply and then measure the measurement.

For this capacitor capacitance, the device is installed in the range from 200 nanopharad to 2 microfarade, since the capacitance of the capacitor is 0.51 microfarade and the set range corresponds to our measurement.

The device’s display of the photo is as seen from the photograph, when measured, it shows 0.527 microfarade. This capacity indicator corresponds to the capacitance of the capacitor indicated on the case, since the deviation in the container is taken into account here.

So, when checking the capacitor of the electric motor, we were convinced that the capacitor is suitable for operation, the capacitor lining is not violated and we should go to the next checks.

Checking the stator windings. Engine

Four wires of the photo are displayed from the windings of the electric motor stator and for this check we need to measure the resistance of each of the two windings.

The first thing we have to do is to set the device to the appropriate resistance measurement range.

Next, we connect the probes of the device with one pair of wires of the same color as shown in the photograph of the display of the device in this dimension shows the value. 1125, more precisely, this indication will be. 1, 125 kom.

When measuring the second winding of the electric motor stator photo, the display of the device for this example, shows the number. 803. That is, more precisely, the resistance of the second winding of the electric motor stator is 803 Ohms.

To measure the overall resistance of the photo 0 of two stator windings, one pair of wires must be closed accurately and connect two probes of the device to the second pair of wires. This method is the final and more accurate to identify the integrity or rupture of the sequentially connected two windings.

The display of the device, as we turned our attention, shows the overall resistance of the two windings of the electric motor stator. 1927, or rather. 1.927 kom.

With any closure in the electric motor circuit, the device will indicate the zero resistance value. As shown in the photograph 1.

The device of the fan electric motor

So the electric motor is.12 desktop fan? The fan engine is asynchronous, single.Phase with a short.Circuit rotor.

Why exactly with a short.Closed rotor?. You ask. Because the rotor, as can be seen from the photograph, is made by pouring the grooves of the core melted aluminum, as well as casting on its short.Crumbling rings. The fan blades. Precisely, there is no visually. Rotor windings are not observed here.

The blades on the rotor are used both for cooling and for circulating the air of the electric motor. The capacitor serves for the initial shift of the rotor rotor.

The speed of rotation of the rotor in the rotating electromagnetic field of the stator of this type of engine is 1200 about.Min. The input power of such an engine is small. 60 watts. Power consumption is generally comparable to the power of the incandescent lamp of an electric light bulb.

The electric motor in his performance is simple. The only main reason for the malfunction of the electric motor here may be:

check, using, multimeter

We figured out the electric motor, having thoroughly dismantled it and now of course we need to learn. How to correctly execute wire connections. That is, it is necessary to correctly connect the electric motor, if the electric motor is incorrectly connected, it will simply fail.

Connection of the fan electric motor

According to the pattern, it is clear that the electric motor of the desktop fan consists of two windings:

If you look at the photographs, you can see that the stator consists of four coils. That is, each winding in this example consists of two half.Checkers, if I may say.

When measuring the resistance of the first winding, the resistance was 1.125 kom. When measuring the resistance of the second winding, the resistance was 803 Ohms.

We need to correctly connect the capacitor in the electrical circuit of the electric motor.

check, using, multimeter

How to connect the capacitor in the electric motor correctly

So friends, for reminder, we consider the connection of a single.Phase asynchronous electric motor with a short.Closed rotor.

For the correct connection of the capacitor, which is in the electrical circuit of the engine, it is necessary to determine:

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