Fan speed control. Tri-speed fan speed control

In fact, the fan speed regulator is engaged in changing the voltage that is applied to the device. In terms of engines, the above device is responsible for switching the winding. The frequency of the current can vary substantially.

It is thanks to the regulators of fans that electrical appliances can last for many years. This is due to a decrease in wear and tear of the important components of the unit. In addition, there is the possibility to reduce electricity consumption. In turn, at higher speeds, the fan is much quieter.

Thyristor fan controllers

The thyristor fan speed controller (shown below) can only be installed on single-phase equipment. Of the features can be identified a reliable protection system. Thanks to it, the fan speed control regulator prevents overheating of important components. As a result, the revolutions can be controlled by varying the amperage.

As a power source of the device is a network with a voltage of 220 V. At the same time, the average frequency fluctuates around 55 Hz. The maximum voltage deviation is allowed in 15%. Many models of thyristor regulators are equipped with special sensors. The most common devices are those labeled "RTS". They can be used at temperatures from -50 to +50 degrees. In the installation, the fan speed control is quite simple. At the same time, the speed indicator is provided for it.

Features of frequency regulators

As a rule, the frequency regulator of the fan speed is able to cope with a very high voltage. In this case, the rotation speed changes due to a change in the current strength. Most often this type can be found on various air conditioning systems. Additionally, frequency regulators are ideally suited for devices engaged in air ventilation. In general, the above devices look quite simple.

Characteristics of frequency regulators

They feed from the network with a voltage of 220 V. The output power of the fan at the same time should not exceed 500 watts. The maximum resistance of the regulator is on the average 300 kOhm, and the control signal of the system can be perceived up to 10 V. Directly the regulator unit consumes 3 V power.

The standard set of the device consists of a cable, as well as a screw-type terminal. The fuses in the device are available with a current strength of at least 3 A. The degree of protection in many models is established by the class "IP21". The frequency regulator of the fan speed can be used at temperatures from -10 to +30 degrees.

Transformer fan controllers

The transformer speed controller of the fan 12V is used exclusively for high-power single-phase or three-phase motors. Direct control of revolutions is carried out in a stepwise manner. At the same time, there is an opportunity to establish automatic coordination. Temperature sensors are installed in many models.

In addition, it is possible to select transformer fans controllers with moisture indicators. At the same time, their power can be changed by means of a timer. These devices are fixed with screws. The device can be equipped with special fixatives for the rigidity of the connection. As an input terminal, there are terminals. Power cables are included in the standard kit.

Resistance transformer regulator can withstand at 400 kOhm. In this case, the control signal is sensed up to 4 V. In addition, the high load of the relay output should be noted. The power consumption of the device on average varies about 12 V. In general, these devices are quite cumbersome in comparison with frequency fans and more expensive fans.

Triac types of regulators

The triac fan speed control is the most sophisticated device of all the above types. It is used to control several instruments at once. In this case, the motors can be mounted on them, as well as alternating current. Directly changing speed is fairly smooth.

It is also important to note that the voltage range is very wide. Three-phase models of regulators are distinguished with special accuracy. To reduce the volume of the sound from the device, the device has a special smoothing capacitor. The installation of a Triac controller can be different. The most common is recessed mounting, but many manufacturers are able to offer fasteners for external fixation of the device.

The principle of operation of the triac controller

The processing of all data is handled by the microprocessor unit. In turn, a sensor is used to transmit the signal to the triac control of the fan speed. It is connected through the inlet on the side panel. In addition, the sensor monitors the temperature of the device during operation. The resistance of the unit is constantly regulated.

To eliminate interference that occur during operation, there is a digital filter. It can also suppress pulse jumps in the system. The resistor of the fan speed regulator is responsible for the current conversion. As a result, when the temperature rises sharply, the sensor signals the need to reduce the voltage. Further much depends on the preset settings of the triac controller. Thus, by programming, basic values can be changed.

Installing the Triac Controller

To install the fan speed regulator 220V, completely disconnect the power supply. Further it is important to remove the main panel, which is in front of the device. Only then you can detach the cover of the unit. The next step is to install a temperature sensor in the inlet. To connect the power supply system, you should familiarize yourself with the circuit diagram of the device.

Direct connection to the electric motor of the fan is carried out with the help of insulated wires of stranded type. The air condenser is then turned on, which is next to the temperature sensor. It is very important to check the main socket of the device. For good communication there should not be any pollution. Otherwise, the signal will not reach the microprocessor block. To clean the connector qualitatively, specialists use means to remove copper oxide.

After securing the top cover, the unprotected area is smeared with a paste for good thermal conductivity. As a rule, use the remedy exclusively on a non-drying basis. Side plates shimistrovogo regulator fastened to the locks. They are also glued on top for thermal insulation. The width of the strip should not be less than 10 mm. After that, the fan speed regulator 220V can be fixed on the shield. It is important to pay attention to the wiring and do not clamp it during the fixing of the device. The last step of the installation is to connect the power network. After testing the connector for strength, you need to make a test inclusion.

Models for fans with asynchronous motors

A distinctive feature of many models is a smooth speed control. Thus fans should be with a rated current no more than 6 And, and average frequency - around 45 Hz. Power supply regulators is a network with a voltage of 230 V. The degree of protection they have a class "IP 54". A special controller is installed to program the system.

Thanks to the above controllers, the engine start-up is rather smooth. In this case, the shaft rotates at a constant frequency. Motor current protection is installed in many models. Minimum speed can be set by the controller.

This function is typical for regulators with potentiometers of class VM and VX. The reset of the speed is controlled by the controller board, and you can see its operation by LED sensors. To stabilize the voltage on the motor winding there is a microcontroller. By eliminating phase outages, high energy savings can be achieved.

Heater Controls

The fan speed controller can significantly reduce the noise from the motor. At the same time, it provides convenient external control. As a result, you can significantly reduce electricity consumption.

In addition, the wear of parts is greatly reduced by adjusting the limiting frequency. The pulse width modulator is responsible for this in the system. The operating current of the regulator fluctuates around 0.7 A. The maximum output power is approximately 550 watts. The input resistance of the regulators of this class is maintained at 200 kOhm. In this case, the control signal is perceived at the level of 8 V. The cable, as a rule, is enclosed in the complete set of shielded type.

The load on the line outputs is on average 3 A. In turn, the power consumption of the device is in the range of 4 to 8 V. The fuses in the regulators for air conditioning systems are installed in the class FUSE, and the limiting current they are able to pass at the level of 5 A. The degree of protection in There is a class of "IP21". Almost all models are attached to the air-conditioning system exclusively by an external method - using screws. In general, they are quite compact and weigh very little.