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2020-01-08

Complete Set of DC Fan Speed Control Methods

Complete Set of DC Fan Speed Control Methods

2020-01-06

Variable Frequency Motor Control Circuit of DC Cooling Fan

The application of DC cooling fans in our lives is very common, so what is a variable frequency motor? Is it closely related to cooling fans? The variable frequency motor has the characteristics of a DC motor, but adopts an AC motor structure. In other words, although the external access is direct current, the DC AC frequency conversion control technology is purchased, and the motor body works completely in accordance with the principle of AC. Therefore, the variable frequency motor is also called "self-controlled variable frequency synchronous motor". The rotational speed n of the motor depends on the set frequency f of the controller. The drive circuit of the variable frequency motor consists of two parts: the main circuit and the control circuit. Now these two parts have been integrated into the same

Variable Frequency Motor Control Circuit of DC Cooling Fan

2019-12-30

Basic knowledge of DC brushless fan

Do you know the DC brushless fan? Do you know the basic knowledge of DC brushless fan? Fan parameters: The first is the fan size: mainly refers to the size of the fan, generally expressed in terms of the outside length of the fan and the thickness of the product, in mm. The specifications and models of the fan are often named by the size number, such as: DC8025, where the 8025 represents the size of the product.

Basic knowledge of DC brushless fan

2019-12-27

Jiangshan to attend Shenzhen International Electronics Show

Shenzhen International Electronics Show (ELEXCON) has been successfully held for 27 sessions so far. It is one of the weather vane of China's electronics industry. It is a global integrated circuit, electronic components, sensors, connectors, wireless, power supply, electronic materials, intelligent hardware, production equipment And an excellent platform for industry solutions and other enterprises to conduct brand promotion, technology and business exchanges. It is also an electronic manufacturing professional, buyers, and decision makers to collect information, A one-stop platform to explore the development direction of the industry.

Jiangshan to attend Shenzhen International Electronics Show

2019-12-25

What is the main heat dissipation method of the micro cooling fan?

Heat dissipation can be divided into two types: passive heat dissipation and active heat dissipation. In active heat dissipation, according to the heat dissipation method adopted, it can be divided into air-cooled heat dissipation, water-cooled heat dissipation, liquid-cooled heat dissipation, heat pipe radiator heat dissipation, semiconductor refrigeration chip heat dissipation, compressor auxiliary heat dissipation and liquid nitrogen heat dissipation. The working principle of the cooling fan is realized according to energy conversion, that is, electrical energy → electromagnetic energy → mechanical energy → kinetic energy. The circuit principle is generally divided into various forms, and the performance of the fan will vary according to the circuit used. At the same time, the cooling fan is widely used because of its fast speed, easy installation and good cooling effect. The heat dissipation method of the micro cooling fan refers to the dispersion

What is the main heat dissipation method of the micro cooling fan?

2019-12-23

Cooling fan in the purchase need to pay attention to some common sense

When buying a fan, you should generally understand, as follows: Information: 1. The size of the fan. 2 Determine whether the fan is DC or air conditioner? 3 Fan power supply voltage value. For example: AC 220V, 110V, 380V, DC 5V, 12V, 24V, 36V, 48V. 4 fan, ball or oil bearing form. The air volume and speed of the fan. For example, how many cubic meters per minute, or how many cubic feet per minute. 6 wind pressure value. Second, about the bearing: plain bearing In the design of a conventional DC brushless fan motor, the fan blade rotor (rotor for short) and its shaft core pass through oil-containing bearings and sleeve bearings for short, which are pivotally fixed in the center of the stator of the motor so that a proper clearance is maintained between the rotor and the stator. Of course, there must be a gap between the shaft core and the bearing to prevent the shaft core from being deadlocked and unable to operate. The stator structure part of the motor (referred to as the stator) will generate induced magnetic lines of force between the rotor and the stator after the input power, and the control of the drive circuit will make the fan motor run. Thus, conventional fan motor configurations have only one fan blade rotor, one motor stator, and one drive circuit, and operate in a field-induced manner through the pivotal connection between the shaft core and the bearing. 1. Advantages with oil bearing A. resistance to external impact, less damage during transportation; B. The price is cheap (compared with ball bearings, the price is very different. 2. Disadvantages with oil bearing A. Due to the operation of the fan motor, the dust in the air will be sucked into the motor core and mixed with the lubricating oil stored around the bearing to form sludge, which will increase the operating noise and even jam. The inner diameter of the bearing is easy to wear and the service life is short; C. cannot be used on portable products; D. The clearance between the bearing and the shaft core is small, and the starting effect of the motor is poor; E. During the operation of the motor, the high-temperature gas generated by the friction between the shaft core and the bearing is blocked by the oil rings and washers at both ends of the bearing, and cannot be removed to form nitride. The nitride is easily blocked in the gap between the shaft core and the bearing, Hindering the smooth operation of the motor.

Cooling fan in the purchase need to pay attention to some common sense

2019-12-18

There will be noise if the cooling fan is not installed correctly.

The noise problem of the cooling fan is a relatively common problem. Some are the quality of the cooling fan itself, while others are the installation of the cooling fan. Therefore, the correct installation of the cooling fan is also very important 1. The installation method of clamping the cooling fan frame up and down. Due to the vibration of the cooling fan during operation, it is easy to produce resonance and amplify the sound. A high-speed cooling fan without vibration can not be.

There will be noise if the cooling fan is not installed correctly.

2019-12-16

Noise processing method of DC cooling fan

The DC cooling fan is very strange and familiar to us. It is strange because of its name, and it becomes familiar because we often touch it. We see it whenever we disassemble old equipment or repair household appliances. Then the following editor will explain the causes and treatment methods of DC cooling fan noise.

Noise processing method of DC cooling fan
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