KR102335961B1 - Smart fan control method and system in temperature hysteresis section - Google Patents

Abstract

The present invention relates to a method and system capable of controlling a speed of a fan according to a temperature change of a central processing unit (CPU) in order to maintain performance of a server. The present invention relates to the method and system capable of controlling the speed of the fan adaptively according to the temperature of the server and the situation of the server to minimize a power consumption while maintaining the optimum temperature for the server to operate normally, wherein the method comprises: a first step of detecting the temperature of the internal CPU of the server; a second step of determining whether to control the temperature of the internal CPU of the server; a third step of determining the fan speed that minimizes the power consumption in consideration of the temperature specification, the data amount, the average data amount, and the fan temperature correlation of the server CPU; and a fourth step of controlling the speed of a cooling fan according to the determined fan speed.

Description

Smart fan control method and system in temperature hysteresis section

The present invention relates to a method and system for controlling the speed of a fan according to a change in temperature of a central processing unit (CPU) in order to maintain server performance, It relates to a method and system that can minimize power consumption while maintaining the optimum temperature for normal server operation by controlling the speed.

A server means a computer that provides a service to a client through a network. There are people who think that there is a main computer that centrally manages the Internet, but in fact, the Internet is formed by tangled webs of numerous servers. A server is absolutely necessary to operate the website, and online games and web games are also provided through the server. Usually, in organizations of a certain size, firewalls and routers are attached to databases, web application servers, etc. to form a network.

As the number of users access increases, the load on the server increases, so the performance and number of servers operated differ according to the size of the service. The reason that online games are regularly inspected is to check the server, and if the game does not run properly due to crowds of users, there may be other reasons, but in most cases, this is a phenomenon that the server cannot handle.

If the amount of data to be processed increases, such as when the server cannot handle the users, heat is generated. . Therefore, in order for the server to operate normally, the fan must be operated to cool the heat generated by the server.

However, low server temperature is not always a good thing, and operating the fan inevitably consumes power, so it is not good to run the fan at full speed blindly. There is a need for a method.

Accordingly, an object of the present invention is to solve the above problems, and to provide a cooling fan control method capable of minimizing power consumption and maximizing data processing efficiency in consideration of server circumstances and conditions.

In addition, an object of the present invention is to provide a cooling fan control method in which a target temperature is set according to the specifications of the server and the temperature is controlled so that each server can achieve maximum efficiency even when servers having different specifications are gathered.

A method for controlling a smart fan in a temperature hysteresis section according to an embodiment of the present invention for solving the above problem includes: a first step of detecting a temperature of a CPU inside a server; a second step of determining whether to control the temperature of the internal CPU of the server; a third step of determining a fan speed that minimizes power consumption in consideration of the temperature specification, data amount, average data amount, and fan temperature correlation of the server CPU; and a fourth step of controlling the speed of the cooling fan according to the determined fan speed.

According to an embodiment of the present invention, when the determined fan speed is out of the duty max range from the duty min, a fifth step of changing the duty min or the duty max to be smaller than or larger than the fan speed; and a sixth step of returning to the first step when a preset period is reached.

According to an embodiment of the present invention, the third step may be calculated by Equation 1 below.

[Equation 1]

는 t1에서 제어할 팬 속도,

는 t1에서의 데이터량,

는 t1에서의 평균 데이터량,

는 팬 속도 온도 상관 관계,

는 목표 온도이다.)(here,

is the fan speed to be controlled at t1,

is the amount of data at t1,

is the average data amount at t1,

is the fan speed temperature correlation,

is the target temperature.)

According to an embodiment of the present invention, the target temperature of the third step is

It can be calculated by Equation 2 below.

[Equation 2]

는 서버 스펙, 데이터량 및 에너지 효율에 따른 적정 온도 값,

는 t1에서의 데이터량,

는 온도에 따른 에너지 효율 값이다.)(here,

is the appropriate temperature value according to the server specification, data amount and energy efficiency,

is the amount of data at t1,

is the energy efficiency value according to the temperature.)

According to an embodiment of the present invention, in the fifth step, when the duty max needs to be lowered, it may be lowered by a certain ratio in relation to the reference duty max.

According to the present invention, it is possible to select a temperature that can probabilistically minimize power consumption and maximize data processing efficiency in consideration of the server situation and conditions, and control the fan according to the selected temperature.

In addition, the present invention can set the target temperature according to the specifications of the server, so that even when servers having different specifications are gathered, the temperature can be controlled so that each can achieve maximum efficiency.

On the other hand, the effects of the present invention are not limited to the above-mentioned effects, and various effects may be included within the range apparent to those skilled in the art from the description below.

1 is an example of an actual server.
2 is a block diagram of a system for performing a smart fan control method in a temperature hysteresis section according to an embodiment of the present invention.
3 is a flowchart of a method for controlling a smart fan in a temperature hysteresis section according to an embodiment of the present invention.

Hereinafter, a 'smart fan control method and system in a temperature hysteresis section' according to the present invention will be described in detail with reference to the accompanying drawings. The described embodiments are provided so that those skilled in the art can easily understand the technical spirit of the present invention, and the present invention is not limited thereto. In addition, matters expressed in the accompanying drawings may be different from the forms actually implemented in the drawings schematically for easy explanation of the embodiments of the present invention.

On the other hand, each component expressed below is only an example for implementing the present invention. Accordingly, in other implementations of the present invention, other components may be used without departing from the spirit and scope of the present invention.

In addition, each component may be implemented purely by a configuration of hardware or software, or may be implemented by a combination of various hardware and software components that perform the same function. In addition, two or more components may be implemented together by one piece of hardware or software.

In addition, the expression 'including' certain components merely refers to the existence of the corresponding components as an expression of 'open type', and should not be construed as excluding additional components.

1 is an example of an actual server.

Referring to Figure 1, the server is generally arranged in parallel to the server rack. When work is performed in a fixed location, heat is generated in the server, and catching such heat is one of the major tasks in server stabilization. There are two types of cooling methods: air cooling and water cooling, but the air cooling type is widely used because it is simpler than the water cooling type in various ways. Because a low temperature is not always good for a server to function, the server must maintain an appropriate temperature, and the most important function in temperature control is the cooling fan.

Accordingly, it is an object of the present invention to control a cooling fan to minimize power consumption while maintaining data processing efficiency of a server.

A cooling fan according to an embodiment of the present invention includes a stator formed by winding a coil, an outer cover covering the stator, and a rotor comprising a permanent magnet disposed on an inner circumferential surface of the outer cover, a hub connected to the outer cover, and the A fan made of a blade extending outward from the hub, and a jig guide hole formed on the exterior cover to align a center with an assembly jig, wherein the center of the permanent magnet is a straight line connecting the center of the center hole and the center of the jig guide hole may be an extension of the

The rotor covers the stator and is configured to rotate by the shaft. The stator is positioned inside the rotor, and the fan is coupled to the outer side of the rotor. The motor including the stator and the rotor may be driven by a coil installed in the stator receiving power from an inverter, and thus rotating the rotor by a repulsive force generated between the coil and the permanent magnet.

The exterior cover may be formed in a closed shape to block the inflow of foreign substances, but may also have a shape in which a predetermined space is opened so that heat inside the exterior cover can be discharged to the outside.

The fan includes a hub and a plurality of blades radially disposed from the hub, and is coupled to the exterior cover to rotate simultaneously with the exterior cover.

2 is a block diagram of a smart fan control system in a temperature hysteresis section according to an embodiment of the present invention.

Referring to FIG. 2 , the smart fan control system 100 in the temperature hysteresis section according to an embodiment of the present invention may include a temperature sensing unit 110 , a speed determining unit 120 , and a fan control unit 130 . have.

The temperature sensing unit 110 may detect a temperature inside the server. The temperature sensing unit 110 may detect the temperature of the CPU included in the server. The temperature sensing unit 110 may be one of a contact type temperature sensor and a non-contact type temperature sensor. The temperature sensing unit 110 according to an embodiment of the present invention may be any one of a thermocouple, a thermistor, a resistance temperature detector (RTD), and an infrared temperature sensor.

The temperature sensing unit 110 may sense the temperature of the server or CPU and transmit it to the speed determination unit 120 . The temperature sensing unit 110 may periodically sense the temperature of the server or CPU and transmit it to the speed determination unit 120 .

The speed determining unit 120 may receive the temperature value sensed by the temperature sensing unit 110 . The speed determination unit 120 may detect a temperature change by receiving the temperature value of the server or the CPU. The speed determination unit 120 may determine whether to control the temperature of the internal CPU of the server according to the degree of temperature change. The speed determining unit 120 may determine the temperature control when the temperature of the internal CPU of the server changes by more than a preset value. The preset value may be a value determined according to a user's arbitrary selection. The preset value may be included in the range of 1 to 5 degrees.

The speed determination unit 120 may determine a fan speed that minimizes power consumption in consideration of the temperature specification, data amount, average data amount, and fan temperature correlation of the server CPU. The speed determination unit 120 may check the temperature specification information of the server CPU. The speed determination unit 120 may check the model or model of the server CPU. The speed determination unit 120 may obtain information about the specification of the server CPU from the outside. The temperature specification of the server CPU may include a temperature range that the server CPU can withstand, and performance changes according to the temperature of the server CPU. The performance change may include a change in a benchmark value.

The speed determining unit 120 may calculate the fan speed that minimizes power consumption by calculating Equation 1 below in consideration of the temperature specification, the data amount, the average data amount, and the fan temperature correlation.

[Equation 1]

는 t1에서 제어할 팬 속도,

는 t1에서의 데이터량,

는 t1에서의 평균 데이터량,

는 팬 속도 온도 상관 관계,

는 목표 온도이다.)(where t1 is the current time,

is the fan speed to be controlled at t1,

is the amount of data at t1,

is the average data amount at t1,

is the fan speed temperature correlation,

is the target temperature.)

The speed determining unit 120 may determine a fan speed that maximizes the data processing efficiency of the server CPU and minimizes power consumption according to the correlation between the fan speed and the temperature to reach the target temperature. The speed determining unit 120 may determine whether the server should maintain maximum data processing efficiency according to the amount of data at the current time, and the speed determining unit 120 is based on the average amount of data at the current time. You can predict how long you need to maintain peak efficiency. Based on these values, the speed determining unit 120 may determine the fan speed according to the temperature at which the highest performance is achieved and the time required to maintain the temperature.

The speed determining unit 120 may determine the target temperature by calculating Equation 2 below.

[Equation 2]

는 서버 스펙, 데이터량 및 에너지 효율에 따른 적정 온도 값,

는 t1에서의 데이터량,

는 온도에 따른 에너지 효율 값이다.)(here,

is the appropriate temperature value according to the server specification, data amount and energy efficiency,

is the amount of data at t1,

is the energy efficiency value according to the temperature.)

The speed determining unit 120 considers server specifications (including CPU specifications) and energy efficiency according to the temperature of the server CPU according to the temperature, the server CPU according to the data amount and temperature at the current time, and the temperature of the fan. to set the target temperature.

The fan control unit 130 may control the cooling fan according to the determination of the speed determination unit 120 . The fan control unit 130 may accelerate, decelerate, or maintain the speed of the cooling fan. The fan controller 130 may control the speed of the cooling fan within a range of a duty min and a duty max. The fan control unit 130 may set the initial duty min to 20 to 30% of the maximum speed. The fan control unit 130 may set the initial duty max to 70 to 80% of the maximum speed.

The fan control unit 130 may change the duty min or the duty max to be smaller or larger than the fan speed when the fan speed determined by the speed determining unit 120 is out of the duty max range from the duty min. When the fan speed determined by the speed determiner 120 is slower than the duty min, the fan control unit 130 may lower the duty min. The fan control unit 130 may increase the duty max when the fan speed determined by the speed determination unit 120 is faster than the duty max. The fan controller 130 may adjust the duty max downward when the fan speed determined by the speed determiner 120 is lower than the duty max after the duty max is adjusted upward.

When the fan speed determined by the speed determiner 120 is lower than the duty max after adjusting the duty max upward, the fan control unit 130 may decrease the duty max by a certain percentage in relation to the initial duty max.

The temperature sensing unit 110 and the speed determining unit 120 may return to the temperature sensing step when a preset period is reached. The preset period may be a value set in the temperature sensing unit 110 and the speed determining unit 120 . The preset period may be the same as the temperature sensing period of the temperature sensing unit 110 . The preset period may be different from the temperature sensing period of the temperature sensing unit 110 . When the preset period is reached, the temperature sensing unit 110 may re-sens the temperature of the server CPU. The speed determining unit 120 may determine the fan speed again when the preset period is reached.

3 is a flowchart of a method for controlling a smart fan in a temperature hysteresis section according to an embodiment of the present invention.

Referring to FIG. 3 , the smart fan control method in the temperature hysteresis section according to an embodiment of the present invention may include a first step ( S110 ) of detecting the temperature of the internal CPU of the server.

In step S110, the temperature sensing unit 110 may detect a temperature inside the server. The temperature sensing unit 110 may detect the temperature of the CPU included in the server. The temperature sensing unit 110 may be one of a contact type temperature sensor and a non-contact type temperature sensor. The temperature sensing unit 110 according to an embodiment of the present invention may be any one of a thermocouple, a thermistor, a resistance temperature detector (RTD), and an infrared temperature sensor.

In step S110 , the temperature sensing unit 110 may sense the temperature of the server or CPU and transmit it to the speed determination unit 120 . The temperature sensing unit 110 may periodically sense the temperature of the server or CPU and transmit it to the speed determination unit 120 .

The smart fan control method in the temperature hysteresis section according to an embodiment of the present invention may include a second step (S120) of determining whether to control the temperature of the internal CPU of the server.

In step S120 , the speed determining unit 120 may receive the temperature value sensed by the temperature sensing unit 110 . The speed determination unit 120 may detect a temperature change by receiving the temperature value of the server or the CPU. The speed determination unit 120 may determine whether to control the temperature of the internal CPU of the server according to the degree of temperature change. The speed determining unit 120 may determine the temperature control when the temperature of the internal CPU of the server changes by more than a preset value. The preset value may be a value determined according to a user's arbitrary selection. The preset value may be included in the range of 1 to 5 degrees.

The smart fan control method in the temperature hysteresis section according to an embodiment of the present invention is a third method for determining a fan speed that minimizes power consumption in consideration of the temperature specification, data amount, average data amount, and fan temperature correlation of the server CPU. It may include a step (S130).

In step S130 , the speed determining unit 120 may determine a fan speed that minimizes power consumption in consideration of the temperature specification, data amount, average data amount, and fan temperature correlation of the server CPU. The speed determination unit 120 may check the temperature specification information of the server CPU. The speed determination unit 120 may check the model or model of the server CPU. The speed determination unit 120 may obtain information about the specification of the server CPU from the outside. The temperature specification of the server CPU may include a temperature range that the server CPU can withstand, and performance changes according to the temperature of the server CPU. The performance change may include a change in a benchmark value.

In step S130, the speed determiner 120 calculates the following equation (1) to calculate the fan speed that minimizes power consumption in consideration of the temperature specification, the data amount, the average data amount, and the fan temperature correlation.

[Equation 1]

는 t1에서 제어할 팬 속도,

는 t1에서의 데이터량,

는 t1에서의 평균 데이터량,

는 팬 속도 온도 상관 관계,

는 목표 온도이다.)(where t1 is the current time,

is the fan speed to be controlled at t1,

is the amount of data at t1,

is the average data amount at t1,

is the fan speed temperature correlation,

is the target temperature.)

In step S130, the speed determining unit 120 may determine a fan speed that maximizes the data processing efficiency of the server CPU and minimizes power consumption according to the correlation between the fan speed and the temperature to reach the target temperature. The speed determining unit 120 may determine whether the server should maintain maximum data processing efficiency according to the amount of data at the current time, and the speed determining unit 120 is based on the average amount of data at the current time. You can predict how long you need to maintain peak efficiency. Based on these values, the speed determining unit 120 may determine the fan speed according to the temperature at which the highest performance is achieved and the time required to maintain the temperature.

The speed determining unit 120 may determine the target temperature by calculating Equation 2 below.

[Equation 2]

는 서버 스펙, 데이터량 및 에너지 효율에 따른 적정 온도 값,

는 t1에서의 데이터량,

는 온도에 따른 에너지 효율 값이다.)(here,

is the appropriate temperature value according to the server specification, data amount and energy efficiency,

is the amount of data at t1,

is the energy efficiency value according to the temperature.)

In step S130, the speed determination unit 120 considers the server specifications (including the specifications of the CPU) according to the temperature of the server CPU according to the temperature, the server CPU according to the data amount and temperature at the current time, and the temperature of the fan. A target temperature may be set in consideration of energy efficiency.

The smart fan control method in the temperature hysteresis section according to an embodiment of the present invention may include a fourth step (S140) of controlling the speed of the cooling fan according to the determined fan speed.

In step S140 , the fan control unit 130 may control the cooling fan according to the determination of the speed determination unit 120 . The fan control unit 130 may accelerate, decelerate, or maintain the speed of the cooling fan. The fan controller 130 may control the speed of the cooling fan within a range of a duty min and a duty max. The fan control unit 130 may set the initial duty min to 20 to 30% of the maximum speed. The fan control unit 130 may set the initial duty max to 70 to 80% of the maximum speed.

The smart fan control method in the temperature hysteresis section according to an embodiment of the present invention is a fifth step of changing the duty min or the duty max to be smaller or larger than the fan speed when the determined fan speed is out of the duty max range from the duty min (S150) may be included.

In step S150 , the fan control unit 130 may change the duty min or the duty max to be smaller than or greater than the fan speed when the fan speed determined by the speed determining unit 120 is outside the range of the duty max from the duty min . When the fan speed determined by the speed determiner 120 is slower than the duty min, the fan control unit 130 may lower the duty min. The fan control unit 130 may increase the duty max when the fan speed determined by the speed determination unit 120 is faster than the duty max. The fan controller 130 may adjust the duty max downward when the fan speed determined by the speed determiner 120 is lower than the duty max after the duty max is adjusted upward.

In step S150, when the fan speed determined by the speed determining unit 120 is lower than the duty max after adjusting the duty max upward, the fan control unit 130 lowers the duty by a certain percentage in relation to the initial duty max. can

The smart fan control method in the temperature hysteresis section according to an embodiment of the present invention may include a sixth step (S160) of returning to the first step when a preset period is reached.

In step S160 , the temperature sensing unit 110 and the speed determining unit 120 may return to the temperature sensing step when a preset period is reached. The preset period may be a value set in the temperature sensing unit 110 and the speed determining unit 120 . The preset period may be the same as the temperature sensing period of the temperature sensing unit 110 . The preset period may be different from the temperature sensing period of the temperature sensing unit 110 . When the preset period is reached, the temperature sensing unit 110 may re-sens the temperature of the server CPU. The speed determining unit 120 may determine the fan speed again when the preset period is reached.

So far, the present invention has been looked at with respect to preferred embodiments thereof. Those of ordinary skill in the art to which the present invention pertains will understand that the present invention can be implemented in a modified form without departing from the essential characteristics of the present invention. Therefore, the disclosed embodiments are to be considered in an illustrative rather than a restrictive sense. The scope of the present invention is indicated in the claims rather than the foregoing description, and all differences within the scope equivalent thereto should be construed as being included in the present invention.

Claims (5)

A first step of detecting the temperature of the internal CPU of the server;
a second step of determining whether to control the temperature of the internal CPU of the server;
a third step of determining a fan speed that minimizes power consumption in consideration of the temperature specification, data amount, average data amount, and fan temperature correlation of the internal CPU of the server; and
A fourth step of controlling the speed of the cooling fan according to the determined fan speed;
The third step is
A smart fan control method in a temperature hysteresis section, characterized in that it is calculated by Equation 1 below.
[Equation 1]

(where t1 is the current time,

is the fan speed to be controlled at t1,

is the amount of data at t1,

is the average data amount at t1,

is the fan speed temperature correlation,

is the target temperature.)

According to claim 1,
a fifth step of changing the duty min or the duty max to be smaller than or larger than the fan speed when the determined fan speed is outside the range of duty max from duty min; and
The smart fan control method in the temperature hysteresis section further comprising; a sixth step of returning to the first step when a preset period is reached.

delete According to claim 1,
The target temperature of the third step is,
A method for controlling a smart fan in a temperature hysteresis section, characterized in that it is determined by calculation by Equation 2 below.
[Equation 2]

(here,

is the appropriate temperature value according to the server specification, data amount and energy efficiency,

is the amount of data at t1,

is the energy efficiency value according to the temperature.)
3. The method of claim 2,
The fifth step is
When the duty max is adjusted downward after the duty max is increased, the smart fan control method in the temperature hysteresis section, characterized in that it is decreased by a certain ratio in relation to the initial duty max.

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