TWI482422B - Fan control system and fan control method - Google Patents

Fan control system and fan control method Download PDF

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TWI482422B
TWI482422B TW101141043A TW101141043A TWI482422B TW I482422 B TWI482422 B TW I482422B TW 101141043 A TW101141043 A TW 101141043A TW 101141043 A TW101141043 A TW 101141043A TW I482422 B TWI482422 B TW I482422B
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fan
signal
speed
control
power
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TW201419747A (en
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Chia Hsiang Chen
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Inventec Corp
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Description

風扇控制系統及風扇控制方法Fan control system and fan control method

本發明是有關於一種計算機裝置的風扇控制技術,且特別是有關於一種在待機狀態下自動切換風扇轉速及調整供電的風扇控制系統及其風扇控制方法。The present invention relates to a fan control technology for a computer device, and more particularly to a fan control system for automatically switching a fan speed and adjusting power supply in a standby state, and a fan control method thereof.

當計算機裝置運作在待機(Standby)狀態(也就是,在進階組態與電源介面(Advanced Configuration and Power Interface;ACPI)中所定義的S5狀態、軟體關閉(soft off)狀態)下的時候,雖然使用者認為計算機裝置已經關機,但計算機裝置並非完全停止運作。也就是,計算機裝置內的部分設備仍會在待機狀態下維持運轉。由於這些設備仍有散熱需求,因此部份風扇在待機狀態下仍需運轉。When the computer device is operating in a Standby state (ie, in the S5 state, soft off state defined in the Advanced Configuration and Power Interface (ACPI)), Although the user believes that the computer device has been turned off, the computer device does not completely stop operating. That is, some of the devices in the computer device will still operate in the standby state. Because these devices still have cooling requirements, some fans still need to operate in standby mode.

以往作法是在待機狀態中將仍需運轉的設備上裝設利用預備電源(AUX power)進行驅動的風扇,並讓基板管理控制器控制這些風扇。由於這些風扇透過預備電源進行驅動,因此,若是基板管理控制器設定風扇轉速過高時,將使預備電源的供電量瞬間不足而導致電源供應器重置(reset),連帶使計算機裝置不穩定。因此,基板管理控制器在自動設定待機狀態下的風扇轉速時仍然可能發生失誤,就有可能會發生上述情形。In the past, a fan that is driven by an auxiliary power supply (AUX power) is installed in a device that still needs to be operated in a standby state, and the base management controller controls the fans. Since these fans are driven by the reserve power source, if the board management controller sets the fan speed too high, the power supply amount of the standby power source is instantaneously insufficient to cause the power supply to be reset, and the computer device is unstable. Therefore, the substrate management controller may still make a mistake when automatically setting the fan speed in the standby state, and the above situation may occur.

另一方面,由於風扇僅利用單一電源(預備電源)進行驅動,因此當計算機裝置由待機狀態回到正常運作(runtime) 狀態時,風扇能夠產生的散熱效果便會大打折扣,不符現今計算機裝置在正常運作狀態下的散熱需求。On the other hand, since the fan is driven only by a single power source (pre-power source), when the computer device returns from the standby state to the normal operation (runtime) In the state of the state, the heat dissipation effect of the fan can be greatly reduced, which does not meet the heat dissipation requirements of the current computer device under normal operating conditions.

本發明提供一種風扇控制系統及風扇控制方法,其依據計算機裝置的電源管理狀態以及其供電情況來調整風扇的電源供應及控制轉速,讓待機狀態下的部份設備能夠維持一定程度的散熱。此外,為避免基板管理單元故障,本發明實施例亦額外設置有監控裝置,藉以維持計算機裝置的散熱效能。The invention provides a fan control system and a fan control method, which adjust the power supply and control speed of the fan according to the power management state of the computer device and the power supply condition thereof, so that some devices in the standby state can maintain a certain degree of heat dissipation. In addition, in order to avoid the failure of the substrate management unit, the embodiment of the present invention additionally provides a monitoring device to maintain the heat dissipation performance of the computer device.

本發明提出一種風扇控制系統,適用於計算機裝置。風扇控制系統包括風扇、基板管理單元、電源控制模組以及轉速切換模組。風扇受到控制電源以及轉速控制訊號而驅動。當在計算機裝置的待機狀態下時,基板管理單元則提供一風扇致能訊號、一轉速控制訊號及一第一風扇轉速訊號。電源控制模組耦接至基板管理單元及風扇,其接收所述風扇致能訊號以決定提供控制電源給予風扇。並且,電源控制模組依據計算機裝置的供電情況切換預備電源或主要電源以作為所述控制電源,藉以提供至所述風扇。轉速切換模組耦接基板管理單元及風扇,其接收並依據轉速控制訊號切換第一風扇轉速訊號或一第二風扇轉速訊號作為所述轉速控制訊號,藉以提供至所述風扇。The present invention provides a fan control system suitable for use in a computer device. The fan control system includes a fan, a baseboard management unit, a power control module, and a speed switching module. The fan is driven by the control power and the speed control signal. When the computer device is in the standby state, the substrate management unit provides a fan enable signal, a speed control signal, and a first fan speed signal. The power control module is coupled to the baseboard management unit and the fan, and receives the fan enable signal to determine to provide control power to the fan. Moreover, the power control module switches the preliminary power source or the main power source as the control power source according to the power supply condition of the computer device, thereby providing the fan. The speed switching module is coupled to the baseboard management unit and the fan, and receives and controls the first fan speed signal or a second fan speed signal as the speed control signal according to the speed control signal, thereby being provided to the fan.

在本發明之一實施例中,上述風扇控制系統更包括:一監控模組,其耦接基板管理單元、電源控制模組及轉速切換模組。監控模組偵測所述風扇致能訊號,並當風扇致 能訊號在計算機裝置的待機狀態下已經禁能一預定期間之後,監控模組於一強制運轉期間內提供一強制運轉訊號。藉此,電源控制模組接收所述強制運轉訊號以提供控制電源至風扇,且轉速切換模組接收所述強制運轉訊號以提供第二風扇轉速訊號作為轉速控制訊號至風扇。In an embodiment of the present invention, the fan control system further includes: a monitoring module coupled to the substrate management unit, the power control module, and the speed switching module. The monitoring module detects the fan enable signal and acts as a fan After the signal is disabled for a predetermined period of time in the standby state of the computer device, the monitoring module provides a forced operation signal during a forced operation period. Thereby, the power control module receives the forced operation signal to provide control power to the fan, and the speed switching module receives the forced operation signal to provide the second fan speed signal as the speed control signal to the fan.

於另一觀點而言,本發明提出一種風扇控制方法,適用於包括一風扇的一計算機裝置。所述風扇控制方法包括下列步驟。當在計算機裝置的待機狀態下時,提供風扇致能訊號、轉速控制訊號及第一風扇轉速訊號。依據所述風扇致能訊號以決定是否提供一控制電源給予所述風扇。當決定提供控制電源給予所述風扇時,依據計算機裝置的供電情況切換預備電源或主要電源以作為所述控制電源。依據轉速控制訊號切換第一風扇轉速訊號或第二風扇轉速訊號作為轉速控制訊號。以及,所述風扇受到所述控制電源以及所述轉速控制訊號而驅動。In another aspect, the present invention provides a fan control method suitable for use in a computer device including a fan. The fan control method includes the following steps. The fan enable signal, the speed control signal, and the first fan speed signal are provided when the computer device is in the standby state. The fan is enabled according to the fan enable signal to determine whether to provide a control power. When it is decided to provide the control power to the fan, the preliminary power source or the main power source is switched as the control power source according to the power supply condition of the computer device. The first fan speed signal or the second fan speed signal is switched according to the speed control signal as a speed control signal. And the fan is driven by the control power source and the speed control signal.

在本發明之一實施例中,上述風扇控制方法更包括下列步驟。偵測所述風扇致能訊號,當在計算機裝置的待機狀態下偵測到風扇致能訊號為禁能時,計數一預定期間。在預定期間已計數完畢、且風扇致能訊號仍未致能後,在強制運轉期間內提供強制運轉訊號。依據強制運轉訊號以提供控制電源至所述風扇。依據強制運轉訊號以提供第二風扇轉速訊號作為轉速控制訊號至所述風扇。以及,在所述強制運轉期間後,持續偵測所述風扇致能訊號。In an embodiment of the invention, the fan control method further includes the following steps. The fan enable signal is detected, and when the fan enable signal is detected to be disabled in the standby state of the computer device, the predetermined period is counted. After the scheduled period has been counted and the fan enable signal is still not enabled, a forced operation signal is provided during the forced operation period. A forced operation signal is provided to provide control power to the fan. The second fan speed signal is provided as a speed control signal to the fan according to the forced operation signal. And, after the forced operation period, continuously detecting the fan enable signal.

基於上述,本發明實施例的風扇控制系統及其方法依據計算機裝置的電源管理狀態(例如,正常運作狀態或待機狀態)以及其供電情況來自動調整風扇的電源供應及轉速控制,讓待機狀態下的部份設備能夠維持一定程度的散熱,這些設備也可在正常運作狀態下利用相同的風扇來獲得足夠的散熱效能。除了透過基板管理單元(基板管理控制器)來自動調整風扇轉速之外,亦可以透過內建的固定轉速訊號來調整風扇轉速。另一方面,本發明實施例亦避免基板管理單元故障而額外設置有監控裝置,其在風扇於待機狀態下長時間並未啟動時,將會強制地啟動風扇並使其運轉,從而維持計算機裝置的散熱效能。Based on the above, the fan control system and the method thereof according to the embodiment of the present invention automatically adjust the power supply and the speed control of the fan according to the power management state (for example, the normal operation state or the standby state) of the computer device and the power supply condition thereof, so that the standby state is Some of the devices are capable of maintaining a certain level of heat dissipation. These devices can also use the same fan to achieve sufficient heat dissipation under normal operating conditions. In addition to automatically adjusting the fan speed through the baseboard management unit (substrate management controller), the fan speed can also be adjusted through the built-in fixed speed signal. On the other hand, the embodiment of the present invention also avoids the failure of the substrate management unit and additionally provides a monitoring device, which will forcibly start and operate the fan when the fan is not activated for a long time in the standby state, thereby maintaining the computer device. Cooling performance.

為讓本發明之上述特徵和優點能更明顯易懂,下文特舉實施例,並配合所附圖式作詳細說明如下。The above described features and advantages of the present invention will be more apparent from the following description.

圖1是根據本發明第一實施例說明風扇控制系統100的方塊圖,其適用於包括風扇110的計算機裝置。風扇控制系統100包括風扇110、基板管理單元、電源控制模組130以及轉速切換模組140。本實施例以基板管理控制器(Board Management Controller;BMC)120作為基板管理單元的適例,部分實施例亦可利用計算機裝置中的晶片組、南橋晶片或是用以控制風扇的相關實體電路加以置換,本發明實施例並不受限於此。1 is a block diagram illustrating a fan control system 100 suitable for use with a computer device including a fan 110 in accordance with a first embodiment of the present invention. The fan control system 100 includes a fan 110, a substrate management unit, a power control module 130, and a speed switching module 140. In this embodiment, a substrate management controller (BMC) 120 is used as a substrate management unit. Some embodiments may also use a chip set in a computer device, a south bridge chip, or a related physical circuit for controlling a fan. The permutation, the embodiment of the invention is not limited thereto.

本實施例的風扇110用以裝設在計算機裝置的待機狀態下也仍須進行運作的部份設備上,例如,基板管理控制 器120、網路模組、由預備電源AP所支持運作的複雜可程式邏輯裝置(CPLD)150...等。藉此,本實施例的風扇110數量並不僅限於一個,部分實施例也可以多個風扇來實現。風扇110的接地端耦接至接地電壓GND,而風扇的電源端則耦接至電源控制模組130中電源開關134的輸出端,藉以接收控制電源CP。風扇110的轉速則由轉速切換模組140所提供的轉速控制訊號148所控制及調整。因此,風扇受到控制電源CP以及轉速控制訊號148而驅動。本實施例的轉速控制訊號148以脈衝寬度調變(Pulse Width Modulation;PWM)訊號作為舉例,脈衝寬度調變(Pulse Width Modulation;PWM)訊號可控制風扇110中的馬達轉速。The fan 110 of the embodiment is installed on a part of the device that still needs to operate in the standby state of the computer device, for example, the substrate management control. The device 120, the network module, a complex programmable logic device (CPLD) 150, etc. supported by the standby power supply AP. Therefore, the number of the fans 110 in this embodiment is not limited to one, and some embodiments may also be implemented by multiple fans. The ground end of the fan 110 is coupled to the ground voltage GND, and the power end of the fan is coupled to the output end of the power switch 134 of the power control module 130 to receive the control power source CP. The rotational speed of the fan 110 is controlled and adjusted by the rotational speed control signal 148 provided by the rotational speed switching module 140. Therefore, the fan is driven by the control power source CP and the speed control signal 148. The rotation speed control signal 148 of the embodiment is exemplified by a Pulse Width Modulation (PWM) signal, and a Pulse Width Modulation (PWM) signal can control the motor rotation speed in the fan 110.

基板管理控制器120可透過多種管道來判斷此時的計算機裝置是位於何種電源管理狀態下(例如,正常運作狀態(S0狀態)或是待機狀態(S5狀態))。本實施例中,基板管理控制器120會透過其他設備(例如,電源序列單元)來得知計算機裝置的電源管理狀態。在計算機裝置的待機狀態下時,基板管理控制器120便會提供風扇致能訊號122以及轉速控制訊號124,且當基板管理控制器120在自動控制風扇110時,亦會同時提供第一風扇轉速訊號126以調整風扇轉速。The substrate management controller 120 can determine, under various power management states (eg, a normal operating state (S0 state) or a standby state (S5 state)), through various pipes. In this embodiment, the substrate management controller 120 knows the power management status of the computer device through other devices (for example, a power supply sequence unit). When the computer device is in the standby state, the substrate management controller 120 provides the fan enable signal 122 and the speed control signal 124, and when the substrate management controller 120 automatically controls the fan 110, the first fan speed is also provided. Signal 126 to adjust the fan speed.

電源控制模組130耦接至基板管理控制器120及風扇110。電源控制模組130接收風扇致能訊號122以決定是否提供控制電源CP、並決定提供何種控制電源CP給予風扇 110。於本實施例中,電源控制模組130包括電源控制單元132以及電源開關134。電源控制單元132可以利用複雜可程式邏輯裝置(CPLD)150來實現,而電源開關134則可利用具較大電壓承載力的類比開關來實現。電源控制單元132接收風扇致能訊號122並且判斷此風扇致能訊號122是否致能,藉以表示風扇110在計算機裝置的待機狀態下是否被旋轉/驅動。換句話說,當風扇致能訊號122為致能時,表示基板管理控制器120在計算機裝置的待機狀態下將控制風扇110使其驅動。因此,電源控制單元132接收計算機裝置中電源供應器所提供的供電訊號136,藉以判斷計算機裝置的供電情況,並依據此供電情況提供主要電源致能訊號137及預備電源致能訊號138。電源開關134則接收主要電源MP及預備電源AP,並依據並主要電源致能訊號137及預備電源致能訊號138來提供控制電源CP。The power control module 130 is coupled to the substrate management controller 120 and the fan 110. The power control module 130 receives the fan enable signal 122 to determine whether to provide the control power supply CP, and decides which control power supply CP is provided to the fan. 110. In the embodiment, the power control module 130 includes a power control unit 132 and a power switch 134. The power control unit 132 can be implemented using a Complex Programmable Logic Device (CPLD) 150, while the power switch 134 can be implemented with an analog switch having a large voltage carrying capacity. The power control unit 132 receives the fan enable signal 122 and determines whether the fan enable signal 122 is enabled, thereby indicating whether the fan 110 is rotated/driven in the standby state of the computer device. In other words, when the fan enable signal 122 is enabled, it indicates that the baseboard management controller 120 will control the fan 110 to drive in the standby state of the computer device. Therefore, the power control unit 132 receives the power supply signal 136 provided by the power supply in the computer device, thereby determining the power supply condition of the computer device, and providing the main power enable signal 137 and the preliminary power enable signal 138 according to the power supply condition. The power switch 134 receives the main power source MP and the standby power source AP, and provides the control power source CP according to the main power enable signal 137 and the preliminary power enable signal 138.

例如,當主要電源致能訊號137為致能時,表示電源供應器有提供主要電源MP。因此,在當主要電源訊號137致能時,電源開關134便將主要電源MP導通至電源開關的輸出端以作為控制電源CP。當主要電源訊號137禁能且預備電源致能訊號138致能時,表示電源供應器並未提供主要電源MP而僅提供預備電源AP,因此電源開關134便將預備電源AP導通至電源開關的輸出端以作為控制電源CP。藉此,本發明實施例便可依據計算機裝置的供電情況來動態調整風扇110的控制電源。一般而言,計算機裝置在待機狀態下的時候,由於並未提供主要電源MP,電 源開關134僅能利用預備電源AP作為控制電源CP,而在正常運作狀態下,電源開關134便能利用主要電源MP作為控制電源CP。For example, when the primary power enable signal 137 is enabled, it indicates that the power supply has a primary power source MP. Therefore, when the main power signal 137 is enabled, the power switch 134 turns on the main power source MP to the output of the power switch as the control power source CP. When the main power signal 137 is disabled and the standby power enable signal 138 is enabled, it indicates that the power supply does not provide the main power supply MP and only the preliminary power supply AP is provided, so the power switch 134 turns on the standby power supply AP to the output of the power switch. The end serves as the control power source CP. Thereby, the embodiment of the present invention can dynamically adjust the control power of the fan 110 according to the power supply condition of the computer device. In general, when the computer device is in the standby state, since the main power source MP is not provided, the power is The source switch 134 can only use the backup power source AP as the control power source CP, and in the normal operation state, the power switch 134 can utilize the main power source MP as the control power source CP.

特別說明的是,在計算機裝置的待機狀態下時,本發明實施例可透過基板管理控制器120所提供的轉速切換訊號124來選擇兩種轉速控制方式。第一種轉速控制方式是由基板管理控制器120的第一風扇轉速訊號126來自動控制風扇110的轉速。第二種轉速控制方式則是利用轉速切換模組140在待機狀態下所提供的第二風扇轉速訊號147(也就是,固定時脈的脈衝寬度調變訊號)來控制風扇110轉速。藉此,在基板管理控制器120經常發出過高的風扇轉速訊號導致電源供應器經常重置時,內部電路設計或是使用者便可藉由轉速控制訊號124的調整,使風扇110以固定轉速運轉驅動即可,讓風扇110也能夠提供部份的散熱功效。In particular, in the standby state of the computer device, the embodiment of the present invention can select two speed control modes through the speed switching signal 124 provided by the substrate management controller 120. The first type of speed control mode is to automatically control the speed of the fan 110 by the first fan speed signal 126 of the baseboard management controller 120. The second speed control mode is to control the speed of the fan 110 by using the second fan speed signal 147 (that is, the pulse width modulation signal of the fixed clock) provided by the speed switching module 140 in the standby state. Therefore, when the substrate management controller 120 often sends an excessively high fan speed signal to cause the power supply to be frequently reset, the internal circuit design or the user can adjust the speed control signal 124 to make the fan 110 have a fixed speed. The drive can be operated, and the fan 110 can also provide partial heat dissipation.

於本實施例中,轉速切換模組140包括狀態切換單元142、固定轉速訊號產生單元146以及轉速切換單元144。於本實施例中,狀態切換單元142、固定轉速訊號產生單元146以及轉速切換單元144皆可利用複雜可程式邏輯裝置150來實現,但應用此實施例者應可利用其他相似裝置(例如,邏輯電路、場效可程式化邏輯陣列(FPGA))來實現,其實施方式並不受限於此。狀態切換單元142接收轉速切換訊號124以及正常運作至待機訊號S0_to_S5。當正常運作至待機訊號S0_to_S5致能時,表示計算機裝置已由正常 運作狀態進入待機狀態,因此狀態切換單元142依據轉速切換訊號124來提供轉速調整訊號143。固定轉速訊號產生單元146則依據在電路設計時所提供的預設參數,以產生固定時脈的脈衝寬度調變訊號作為第二風扇轉速訊號147。於本實施例中,固定轉速訊號產生單元146可以為固定時脈的時脈震盪器,但本發明實施例不受限於此。轉速切換單元144耦接狀態切換單元142及固定轉入訊號產生單元146,其接收轉速調整訊號143,藉以依據轉速調整訊號143來決定切換第一風扇轉速訊號126(例如,當轉速調整訊號143/狀態切換單元142致能時)或第二風扇轉速訊號147(例如,當轉速調整訊號143/狀態切換單元142禁能時)以作為轉速控制訊號148。In the embodiment, the speed switching module 140 includes a state switching unit 142, a fixed speed signal generating unit 146, and a speed switching unit 144. In this embodiment, the state switching unit 142, the fixed speed signal generating unit 146, and the speed switching unit 144 can all be implemented by using the complex programmable logic device 150, but other similar devices (for example, logic) should be utilized by the embodiment. The circuit and the field effect programmable logic array (FPGA) are implemented, and the implementation manner is not limited thereto. The state switching unit 142 receives the speed switching signal 124 and the normal operation to the standby signal S0_to_S5. When the normal operation to the standby signal S0_to_S5 is enabled, it indicates that the computer device has been normal. The operating state enters the standby state, so the state switching unit 142 provides the speed adjustment signal 143 according to the speed switching signal 124. The fixed speed signal generating unit 146 generates a pulse width modulation signal of the fixed clock as the second fan speed signal 147 according to the preset parameters provided in the circuit design. In the embodiment, the fixed rotational speed signal generating unit 146 may be a fixed clock pulse oscillator, but the embodiment of the present invention is not limited thereto. The speed switching unit 144 is coupled to the state switching unit 142 and the fixed turn signal generating unit 146, and receives the speed adjustment signal 143, thereby determining to switch the first fan speed signal 126 according to the speed adjustment signal 143 (for example, when the speed adjustment signal 143/ The state switching unit 142 is enabled or the second fan speed signal 147 (for example, when the speed adjustment signal 143 / state switching unit 142 is disabled) as the speed control signal 148.

有鑑於此,風扇控制系統100可依據計算機裝置的電源管理狀態(例如,正常運作狀態或待機狀態)以及其供電情況來自動調整風扇110的電源供應及轉速控制,讓待機狀態下的部份設備能夠維持一定程度的散熱,這些設備也可在正常運作狀態下利用相同的風扇110來獲得足夠的散熱效能。In view of this, the fan control system 100 can automatically adjust the power supply and speed control of the fan 110 according to the power management state (for example, the normal operating state or the standby state) of the computer device and the power supply condition thereof, so that some devices in the standby state are allowed. To maintain a certain level of heat dissipation, these devices can also use the same fan 110 to achieve sufficient heat dissipation performance under normal operating conditions.

在實現上述第一實施例的途中,發現透過基板管理控制器120以控制待機狀態下的風扇時,偶爾還是會發生錯誤,導致計算機裝置重置或使基板管理控制器120無法運作的風險。因此,為讓風扇110在基板管理控制器120故障時仍有其散熱功效,符合本發明精神的第二實施例額外設置有監控裝置以作為驅動風扇的輔助保護機制,使其在 風扇於待機狀態下長時間並未啟動時,利用尚可運轉且少有故障的部份設備(例如,複雜可程式邏輯裝置)強制地啟動風扇並使其運轉,從而自動地維持計算機裝置的散熱效能。In the middle of implementing the above-described first embodiment, it is found that when the substrate management controller 120 is controlled to control the fan in the standby state, an error sometimes occurs, causing the computer device to reset or the substrate management controller 120 to be inoperable. Therefore, in order to allow the fan 110 to have its heat dissipation effect when the substrate management controller 120 fails, the second embodiment in accordance with the spirit of the present invention additionally provides a monitoring device as an auxiliary protection mechanism for driving the fan to When the fan is not started for a long time in the standby state, some devices (such as complex programmable logic devices) that are still running and have few faults are used to forcibly start and operate the fan, thereby automatically maintaining the heat dissipation of the computer device. efficacy.

圖2是根據本發明第二實施例說明風扇控制系統200的方塊圖,其適用於包括風扇110的計算機裝置。本實施例與上述第一實施例的部份元件相類似,因此部份說明請參照上述實施例,在此不予贅述。相較於第一實施例,本實施例增加監控模組260,其耦接基板管理控制器120、電源控制模組130以及轉速切換模組144。監控模組260偵測風扇致能訊號122。當風扇致能訊號122在計算機裝置的待機狀態下為禁能,表示基板管理控制器120已停止風扇110運轉。然而,如果風扇致能訊號122在禁能狀態下維持過久,第一種的可能情況是,基板管理控制器120認為計算機裝置並未過熱而停止風扇110運轉;另一種的可能情況則為,基板管理控制器120已經無法運作,因此沒有將風扇致能訊號122致能。2 is a block diagram illustrating a fan control system 200 suitable for use with a computer device including a fan 110 in accordance with a second embodiment of the present invention. This embodiment is similar to some of the components of the first embodiment described above. Therefore, please refer to the above embodiments for partial description, and details are not described herein. Compared with the first embodiment, the monitoring module 260 is coupled to the baseboard management controller 120, the power control module 130, and the speed switching module 144. The monitoring module 260 detects the fan enable signal 122. When the fan enable signal 122 is disabled in the standby state of the computer device, it indicates that the substrate management controller 120 has stopped the operation of the fan 110. However, if the fan enable signal 122 is maintained in the disabled state for a long time, the first possibility is that the substrate management controller 120 considers that the computer device is not overheated and stops the fan 110 from operating; another possibility is that The substrate management controller 120 is no longer operational, so the fan enable signal 122 is not enabled.

若為後一種的可能情況時,監控模組260便持續偵測風扇致能訊號122在禁能狀態下是否已經到達一預定期間,此預定期間可由應用本實施例者依據其實際情形而定。當已到達該預定期間後,監控模組260便於預設的一強制運轉期間內提供致能的強制運轉訊號270。當電源控制模組130的電源控制單元132接收到致能的強制運轉訊號270時,便依照當時的電源供應情況來提供主要電源致 能訊號137及預備電源致能訊號138,讓電源開關134提供對應的控制電源CP(在待機狀態下通常為預備電源AP)至風扇110。If it is the latter case, the monitoring module 260 continuously detects whether the fan enable signal 122 has reached a predetermined period in the disabled state, and the predetermined period may be determined by the application of the embodiment according to the actual situation. When the predetermined period has been reached, the monitoring module 260 facilitates the provision of the enabled forced operation signal 270 during a predetermined forced operation period. When the power control unit 132 of the power control module 130 receives the enable forced operation signal 270, the main power supply is provided according to the current power supply condition. The signal 137 and the preliminary power enable signal 138 allow the power switch 134 to provide a corresponding control power CP (typically the standby power AP in the standby state) to the fan 110.

此外,轉速切換模組140的轉速切換單元144在接收到致能的強制運轉訊號270時,由於基板管理控制器120可能由於無法運作而無法提供自動調整的第一風扇轉速訊號126,因此便以複雜可程式邏輯裝置150所產生的固定時脈的脈衝寬度調變訊號(第二風扇轉速訊號147)作為轉速控制訊號148並提供至風扇110,藉以使風扇110強制運轉。在經過上述預定的強制運轉期間後,監控模組260會重置並歸零其內部的暫存器,並持續偵測風扇致能訊號122,以確保風扇110在每隔預定期間後便會強制運轉,避免計算機裝置在待機模式下發生過熱現象。In addition, when the speed switching unit 144 of the speed switching module 140 receives the enabled forced operation signal 270, since the substrate management controller 120 may not be able to provide the automatically adjusted first fan speed signal 126 due to inoperability, the The pulse width modulation signal (second fan speed signal 147) of the fixed clock generated by the complex programmable logic device 150 is provided as the speed control signal 148 and supplied to the fan 110, thereby forcibly operating the fan 110. After the predetermined forced operation period, the monitoring module 260 resets and resets its internal register, and continuously detects the fan enable signal 122 to ensure that the fan 110 is forced after every predetermined period of time. Operate to avoid overheating of the computer device in standby mode.

另外,當並未到達預定期間且監控模組260偵測到風扇致能訊號122由禁能狀態轉換為致能狀態時,表示基板管理控制器120仍為正常,因此亦監控模組260會重置並歸零其內部的暫存器,並持續偵測風扇致能訊號122, 於本實施例中,監控模組260包括檢查單元262及計數單元(timing unit)264,檢查單元262耦接計數單元264。所述檢查單元262及計數單元264可利用複雜可程式邏輯裝置(CPLD)150來實現,但本發明實施例並不受限於此。檢查單元262接收並偵測所述風扇致能訊號122,當在計算機裝置的待機狀態下偵測到風扇致能訊號122禁能時,啟動計數單元264以協助計數此預定期間。當計數單元264 在預定期間已計數完畢且檢查單元262在偵測風扇致能訊號262仍未致能之後,檢查單元262在利用預設的強制運轉期間內提供強制運轉訊號270,並在所述強制運轉期間後持續偵測風扇致能訊號270。此外,若檢查單元262在所述預定期間內偵測到風扇致能訊號122從禁能轉換為致能時,表示基板管理控制器120仍有對風扇110進行自動調整,因此檢查單元262便重置檢查單元262及計數單元264的內部暫存器,且重新偵測風扇致能訊號122。本實施例的其餘致動流程及結構已於上述相關說明中揭示,在此不予贅述。In addition, when the predetermined period is not reached and the monitoring module 260 detects that the fan enable signal 122 is changed from the disabled state to the enabled state, it indicates that the baseboard management controller 120 is still normal, and therefore the monitoring module 260 is heavy. Set and return to its internal register, and continuously detect the fan enable signal 122, In this embodiment, the monitoring module 260 includes an inspection unit 262 and a timing unit 264. The inspection unit 262 is coupled to the counting unit 264. The checking unit 262 and the counting unit 264 can be implemented by using a Complex Programmable Logic Device (CPLD) 150, but the embodiment of the present invention is not limited thereto. The checking unit 262 receives and detects the fan enable signal 122. When the fan enable signal 122 is disabled in the standby state of the computer device, the counting unit 264 is activated to assist in counting the predetermined period. When counting unit 264 After the predetermined period has been counted and the inspection unit 262 detects that the fan enable signal 262 is still not enabled, the checking unit 262 provides the forced operation signal 270 during the predetermined forced operation period, and after the forced operation period. The fan enable signal 270 is continuously detected. In addition, if the detecting unit 262 detects that the fan enable signal 122 is switched from disabled to enabled during the predetermined period, it indicates that the baseboard management controller 120 still automatically adjusts the fan 110, so the checking unit 262 is heavy. The internal buffer of the checking unit 262 and the counting unit 264 are set, and the fan enable signal 122 is re-detected. The remaining actuation processes and structures of this embodiment are disclosed in the above related description, and are not described herein.

在此以另一觀點來說明上述實施例,圖3是根據本發明上述實施例說明風扇控制方法的流程圖,其適用於計算機裝置。其中,圖3的步驟S310至步驟S350可對應至圖1及本發明第一實施例,而圖3的所有步驟流程則可對應至圖2及本發明第二實施例。請參考圖2及圖3,於步驟S310時,基板管理控制器120判斷計算機裝置的電源管理狀態。The above embodiment will be explained from another point of view. Fig. 3 is a flow chart showing a fan control method according to the above embodiment of the present invention, which is applied to a computer device. The steps S310 to S350 of FIG. 3 may correspond to FIG. 1 and the first embodiment of the present invention, and all the steps of FIG. 3 may correspond to FIG. 2 and the second embodiment of the present invention. Referring to FIG. 2 and FIG. 3, in step S310, the substrate management controller 120 determines the power management state of the computer device.

當計算機裝置的電源管理狀態為待機狀態時,便由步驟S310進入步驟S320,基板管理單元(基板管理控制器120)提供風扇致能訊號122、轉速切換訊號124及第一風扇轉速訊號126。於步驟S330中,電源控制模組130及監控模組260皆會偵測風扇致能訊號122是否致能。電源控制模組130依據風扇致能訊號122以決定是否提供控制電源CP給予風扇110,而監控模組260則是偵測風扇致能訊號 122,以決定是否進行步驟S360。以下先行描述電源控制模組130的相關步驟。When the power management state of the computer device is in the standby state, the process proceeds from step S310 to step S320, and the substrate management unit (the substrate management controller 120) provides the fan enable signal 122, the speed switching signal 124, and the first fan speed signal 126. In step S330, both the power control module 130 and the monitoring module 260 detect whether the fan enable signal 122 is enabled. The power control module 130 determines whether to provide the control power CP to the fan 110 according to the fan enable signal 122, and the monitoring module 260 detects the fan enable signal. 122, to determine whether to proceed to step S360. The steps associated with the power control module 130 are described below.

當風扇致能訊號122致能時,表示基板管理單元已決定提供控制電源CP給予風扇110,因此進入步驟S335中,電源控制模組130依據計算機裝置的供電情況來切換預備電源AP或主要電源MP,藉以作為控制電源CP。於此時,由於計算機裝置位在待機狀態下,因此電源控制模組130將切換預備電源AP以作為控制電源CP。When the fan enable signal 122 is enabled, it indicates that the substrate management unit has decided to provide the control power CP to the fan 110. Therefore, the process proceeds to step S335, and the power control module 130 switches the standby power source AP or the main power source MP according to the power supply condition of the computer device. , as a control power supply CP. At this time, since the computer device is in the standby state, the power control module 130 will switch the standby power source AP as the control power source CP.

另一方面,如果在步驟S310中,計算機裝置的電源管理狀態為正常運作狀態時,則進入步驟S315,電源控制模組130依據計算機裝置的供電情況(正常供電)來切換主要電源MP以作為控制電源CP。On the other hand, if the power management state of the computer device is in the normal operation state in step S310, the process proceeds to step S315, and the power control module 130 switches the main power source MP as a control according to the power supply condition (normal power supply) of the computer device. Power supply CP.

於步驟S340中,轉速切換模組140便會偵測轉速切換訊號124是否致能。當轉速切換訊號124致能時,則進入步驟S342,轉速切換模組140藉此切換第一風扇轉速訊號126作為轉速控制訊號148,以使基板管理單元能夠自動控制風扇110。另一方面,當轉速切換訊號124禁能時,則進入步驟S344,轉速切換模組140藉此切換第二風扇轉速訊號147作為轉速控制訊號148,以使風扇110以固定轉速運轉。藉此,於步驟S350中,風扇110便可受到控制電源CP以及轉速控制訊號148而驅動運轉。In step S340, the speed switching module 140 detects whether the speed switching signal 124 is enabled. When the speed switching signal 124 is enabled, the process proceeds to step S342. The speed switching module 140 thereby switches the first fan speed signal 126 as the speed control signal 148 to enable the baseboard management unit to automatically control the fan 110. On the other hand, when the speed switching signal 124 is disabled, the process proceeds to step S344, and the speed switching module 140 switches the second fan speed signal 147 as the speed control signal 148 to operate the fan 110 at a fixed speed. Thereby, in step S350, the fan 110 can be driven by the control power source CP and the rotation speed control signal 148.

回到步驟S330及監控模組260。如果監控模組260偵測風扇致能訊號122為禁能時,則由步驟S330進入步驟S360,監控模組260利用計數單元264來計數一預定時 間,且檢查單元262繼續偵測風扇致能訊號122。於步驟S362中,檢查單元262在所述預定期間內偵測風扇致能訊號122是否由禁能轉換為致能。若檢查單元262在所述預定期間內偵測到風扇致能訊號122由禁能轉換為致能時,則從步驟S362進入步驟S335(亦即,當步驟S362為”否”),同時將監控模組260內的暫存器重置歸零,藉以持續偵測風扇致能訊號122。Go back to step S330 and the monitoring module 260. If the monitoring module 260 detects that the fan enable signal 122 is disabled, then step S330 proceeds to step S360, and the monitoring module 260 uses the counting unit 264 to count a predetermined time. And the checking unit 262 continues to detect the fan enable signal 122. In step S362, the checking unit 262 detects whether the fan enable signal 122 is switched from disabled to enabled during the predetermined period. If the checking unit 262 detects that the fan enable signal 122 is switched from disabled to enabled during the predetermined period, then the process proceeds from step S362 to step S335 (ie, when the step S362 is NO), and the monitoring is performed. The register in the module 260 is reset to zero to continuously detect the fan enable signal 122.

回到步驟S362,若計數單元264在預定期間已計數完畢、且檢查單元262偵測風扇致能訊號122仍未從禁能轉換為致能後(亦即,當步驟S362為”是”),則進入步驟S364,檢查單元262會檢查其監控次數是否達到一預定次數。若監控次數沒有達到預定次數時,表示基板管理控制器120仍有可能尚未失去運用,因此檢查單元262還是從步驟S364回到步驟S360,以累積其監控次數。Going back to step S362, if the counting unit 264 has finished counting in the predetermined period, and the checking unit 262 detects that the fan enabling signal 122 has not been converted from disabled to enabled (that is, when the step S362 is YES), Then, proceeding to step S364, the checking unit 262 checks whether the number of times of monitoring reaches a predetermined number of times. If the number of times of monitoring does not reach the predetermined number of times, it indicates that the baseboard management controller 120 may still have not lost the operation, so the checking unit 262 returns from step S364 to step S360 to accumulate the number of times of monitoring.

若監控次數沒有達到預定次數時,則會從步驟S364進入步驟S370,檢查單元262會在預設的強制運轉期間內提供強制運轉訊號270給予電源控制模組130及轉速切換模組140。藉此,於步驟S372中,電源控制模組130將會依據強制運轉訊號270以提供控制電源CP至風扇110。另一方面,轉速切換模組140可於電源控制模組130致動的同時或依照其設定的先後順序,以提供第二風扇轉速訊號147作為轉速控制訊號148至風扇110。If the number of times of monitoring does not reach the predetermined number of times, the process proceeds from step S364 to step S370, and the checking unit 262 provides the forced operation signal 270 to the power control module 130 and the speed switching module 140 during the preset forced operation period. Therefore, in step S372, the power control module 130 will provide the control power CP to the fan 110 according to the forced operation signal 270. On the other hand, the speed switching module 140 can provide the second fan speed signal 147 as the speed control signal 148 to the fan 110 while the power control module 130 is actuated or in accordance with the set sequence.

於步驟S380中,檢查單元262會判斷是否已經經過預定的強制運轉期間。當尚未達到強制運轉期間時(亦即, 當步驟S380為”否”),檢查單元262仍會持續執行步驟S370~S372。若已達到強制運轉期間之後(亦即,當步驟S380為”是”),則檢查單元262會回到步驟S330以持續偵測風扇致能訊號122。In step S380, the checking unit 262 determines whether a predetermined forced operation period has elapsed. When the forced operation period has not been reached (ie, When the step S380 is "NO", the checking unit 262 continues to perform steps S370 to S372. If the forced operation period has been reached (ie, when YES at step S380), the checking unit 262 returns to step S330 to continuously detect the fan enable signal 122.

綜上所述,本發明實施例所述的風扇控制系統及其方法依據計算機裝置的電源管理狀態(例如,正常運作狀態或待機狀態)以及其供電情況來自動調整風扇的電源供應及轉速控制,讓待機狀態下的部份設備能夠維持一定程度的散熱,這些設備也可在正常運作狀態下利用相同的風扇來獲得足夠的散熱效能。除了透過基板管理單元(基板管理控制器)來自動調整風扇轉速之外,亦可以透過內建的固定轉速訊號來調整風扇轉速。另一方面,本發明實施例亦避免基板管理單元故障而額外設置有監控裝置,其在風扇於待機狀態下長時間並未啟動時,將會強制地啟動風扇並使其運轉,從而維持計算機裝置的散熱效能。In summary, the fan control system and the method thereof according to the embodiments of the present invention automatically adjust the power supply and the speed control of the fan according to the power management state (for example, the normal operation state or the standby state) of the computer device and the power supply condition thereof. Some devices in standby mode can maintain a certain degree of heat dissipation. These devices can also use the same fan to obtain sufficient heat dissipation performance under normal operating conditions. In addition to automatically adjusting the fan speed through the baseboard management unit (substrate management controller), the fan speed can also be adjusted through the built-in fixed speed signal. On the other hand, the embodiment of the present invention also avoids the failure of the substrate management unit and additionally provides a monitoring device, which will forcibly start and operate the fan when the fan is not activated for a long time in the standby state, thereby maintaining the computer device. Cooling performance.

雖然本發明已以實施例揭露如上,然其並非用以限定本發明,任何所屬技術領域中具有通常知識者,在不脫離本發明之精神和範圍內,當可作些許之更動與潤飾,故本發明之保護範圍當視後附之申請專利範圍所界定者為準。Although the present invention has been disclosed in the above embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims.

100、200‧‧‧風扇控制系統100, 200‧‧‧Fan control system

110‧‧‧風扇110‧‧‧fan

120‧‧‧基板管理控制器120‧‧‧Baseboard management controller

122‧‧‧風扇致能訊號122‧‧‧Fan enabling signal

124‧‧‧轉速控制訊號124‧‧‧Speed control signal

126‧‧‧第一風扇轉速訊號126‧‧‧First fan speed signal

130‧‧‧電源控制模組130‧‧‧Power Control Module

132‧‧‧電源控制單元132‧‧‧Power Control Unit

134‧‧‧電源開關134‧‧‧Power switch

136‧‧‧供電訊號136‧‧‧Power supply signal

137‧‧‧主要電源致能訊號137‧‧‧Main power enable signal

138‧‧‧預備電源致能訊號138‧‧‧Prepared power enable signal

140‧‧‧轉速切換模組140‧‧‧Speed switching module

142‧‧‧狀態切換單元142‧‧‧State switching unit

143‧‧‧轉速調整訊號143‧‧‧Speed adjustment signal

144‧‧‧轉速切換單元144‧‧‧Speed switching unit

146‧‧‧固定轉速訊號產生單元146‧‧‧Fixed speed signal generating unit

147‧‧‧第二風扇轉速訊號147‧‧‧Second fan speed signal

148‧‧‧轉速控制訊號148‧‧‧Speed control signal

260‧‧‧監控模組260‧‧‧Monitoring module

262‧‧‧檢查單元262‧‧‧Check unit

264‧‧‧計數單元264‧‧‧counting unit

270‧‧‧強制運轉訊號270‧‧‧Forcible operation signal

AP‧‧‧預備電源AP‧‧‧Prepared power supply

CP‧‧‧控制電源CP‧‧‧Control power supply

GND‧‧‧接地電壓GND‧‧‧ Grounding voltage

MP‧‧‧主要電源MP‧‧‧ main power supply

S0_to_S5‧‧‧正常運作至待機訊號S0_to_S5‧‧‧ Normal operation to standby signal

S310~S380‧‧‧步驟S310~S380‧‧‧Steps

圖1是根據本發明第一實施例說明風扇控制系統100的方塊圖。1 is a block diagram showing a fan control system 100 in accordance with a first embodiment of the present invention.

圖2是根據本發明第二實施例說明風扇控制系統200的方塊圖。2 is a block diagram showing a fan control system 200 in accordance with a second embodiment of the present invention.

圖3是根據本發明上述實施例說明風扇控制方法的流程圖。3 is a flow chart illustrating a fan control method in accordance with the above-described embodiments of the present invention.

200‧‧‧風扇控制系統200‧‧‧Fan control system

110‧‧‧風扇110‧‧‧fan

120‧‧‧基板管理控制器120‧‧‧Baseboard management controller

122‧‧‧風扇致能訊號122‧‧‧Fan enabling signal

124‧‧‧轉速控制訊號124‧‧‧Speed control signal

126‧‧‧第一風扇轉速訊號126‧‧‧First fan speed signal

130‧‧‧電源控制模組130‧‧‧Power Control Module

132‧‧‧電源控制單元132‧‧‧Power Control Unit

134‧‧‧電源開關134‧‧‧Power switch

136‧‧‧供電訊號136‧‧‧Power supply signal

137‧‧‧主要電源致能訊號137‧‧‧Main power enable signal

138‧‧‧預備電源致能訊號138‧‧‧Prepared power enable signal

140‧‧‧轉速切換模組140‧‧‧Speed switching module

142‧‧‧狀態切換單元142‧‧‧State switching unit

143‧‧‧轉速調整訊號143‧‧‧Speed adjustment signal

144‧‧‧轉速切換單元144‧‧‧Speed switching unit

146‧‧‧固定轉速訊號產生單元146‧‧‧Fixed speed signal generating unit

147‧‧‧第二風扇轉速訊號147‧‧‧Second fan speed signal

148‧‧‧轉速控制訊號148‧‧‧Speed control signal

260‧‧‧監控模組260‧‧‧Monitoring module

262‧‧‧檢查單元262‧‧‧Check unit

264‧‧‧計數單元264‧‧‧counting unit

270‧‧‧強制運轉訊號270‧‧‧Forcible operation signal

AP‧‧‧預備電源AP‧‧‧Prepared power supply

CP‧‧‧控制電源CP‧‧‧Control power supply

GND‧‧‧接地電壓GND‧‧‧ Grounding voltage

MP‧‧‧主要電源MP‧‧‧ main power supply

S0_to_S5‧‧‧正常運作至待機訊號S0_to_S5‧‧‧ Normal operation to standby signal

Claims (10)

一種風扇控制系統,適用於一計算機裝置,該風扇控制系統包括:風扇,該風扇受到一控制電源以及一轉速控制訊號而驅動;一基板管理控制器,當在該計算機裝置的待機狀態下時,提供一風扇致能訊號、一轉速切換訊號及一第一風扇轉速訊號;一電源控制模組,耦接該基板管理控制器及該風扇,接收該風扇致能訊號以決定提供該控制電源給予該風扇,且依據該計算機裝置的供電情況切換一預備電源或一主要電源作為該控制電源,藉以提供至該風扇;以及一轉速切換模組,耦接該基板管理控制器及該風扇,接收並依據該轉速切換訊號切換該第一風扇轉速訊號或一第二風扇轉速訊號作為該轉速控制訊號,藉以提供至該風扇。 A fan control system is applicable to a computer device, the fan control system includes: a fan driven by a control power source and a speed control signal; and a substrate management controller when in a standby state of the computer device Providing a fan enable signal, a speed switching signal, and a first fan speed signal; a power control module coupled to the baseboard management controller and the fan, receiving the fan enable signal to determine to provide the control power to the a fan, and switching a standby power source or a main power source as the control power source according to the power supply condition of the computer device, thereby providing the fan to the fan; and a speed switching module coupled to the substrate management controller and the fan, receiving and The speed switching signal switches the first fan speed signal or a second fan speed signal as the speed control signal to provide to the fan. 如申請專利範圍第1項所述之風扇控制系統,其中該電源控制模組包括:一電源控制單元,接收並判斷該風扇致能訊號是否致能,且在該風扇致能訊號致能時,接收一供電致能訊號以依據該計算機裝置的供電情況提供一主要電源致能訊號及一預備電源致能訊號;以及一電源開關,耦接該電源控制單元,其中該電源開關接收一主要電源及一預備電源並提供該控制電源,當該主 要電源訊號致能時,將該主要電源作為該控制電源;當該主要電源訊號禁能且該預備電源致能訊號致能時,將該預備電源作為該控制電源。 The fan control system of claim 1, wherein the power control module comprises: a power control unit that receives and determines whether the fan enable signal is enabled, and when the fan enable signal is enabled, Receiving a power enable signal to provide a primary power enable signal and a preliminary power enable signal according to the power supply condition of the computer device; and a power switch coupled to the power control unit, wherein the power switch receives a primary power source and a reserve power supply and provide the control power when the master When the power signal is enabled, the main power source is used as the control power source; when the main power signal is disabled and the preliminary power source enable signal is enabled, the standby power source is used as the control power source. 如申請專利範圍第1項所述之風扇控制系統,其中該轉速切換模組包括:一狀態切換單元,接收該轉速切換訊號以及一正常運作至待機訊號,當該正常運作至待機訊號致能時,依據該轉速切換訊號提供一轉速調整訊號;一固定轉速訊號產生單元,產生固定時脈的脈衝寬度調變訊號以作為該第二風扇轉速訊號;以及一轉速切換單元,耦接該狀態切換單元及該固定轉入訊號產生單元,接收並依據該轉速調整訊號切換該第一風扇轉速訊號或該第二風扇轉速訊號以作為該轉速控制訊號。 The fan control system of claim 1, wherein the speed switching module comprises: a state switching unit that receives the speed switching signal and a normal operation to the standby signal, when the normal operation to the standby signal is enabled Providing a speed adjustment signal according to the speed switching signal; a fixed speed signal generating unit generating a pulse width modulation signal of the fixed clock as the second fan speed signal; and a speed switching unit coupled to the state switching unit And the fixed transfer signal generating unit receives and switches the first fan speed signal or the second fan speed signal as the speed control signal according to the speed adjustment signal. 如申請專利範圍第1項所述之風扇控制系統,更包括:一監控模組,耦接該基板管理控制器、該電源控制模組及該轉速切換模組,該監控模組偵測該風扇致能訊號,並當該風扇致能訊號在該計算機裝置的待機狀態下已禁能一預定期間後,該監控模組於一強制運轉期間內提供一強制運轉訊號,其中,該電源控制模組接收該強制運轉訊號以提供該控制電源至該風扇,且該轉速切換模組接收該強制運轉訊 號以提供該第二風扇轉速訊號作為該轉速控制訊號至該風扇。 The fan control system of claim 1, further comprising: a monitoring module coupled to the substrate management controller, the power control module, and the speed switching module, wherein the monitoring module detects the fan Enabling a signal, and when the fan enable signal is disabled for a predetermined period of time in the standby state of the computer device, the monitoring module provides a forced operation signal during a forced operation period, wherein the power control module Receiving the forced operation signal to provide the control power to the fan, and the speed switching module receives the forced operation signal No. to provide the second fan speed signal as the speed control signal to the fan. 如申請專利範圍第4項所述之風扇控制系統,其中該監控模組包括:一檢查單元;以及一計數單元,耦接該檢查單元,其中,該檢查單元接收並偵測該風扇致能訊號,當在該計算機裝置的待機狀態下偵測到該風扇致能訊號禁能時,啟動該計數單元以計數該預定期間,並在該預定期間已計數完畢且該風扇致能訊號仍未致能後,該檢查單元在該強制運轉期間內提供該強制運轉訊號,並在該強制運轉期間後持續偵測該風扇致能訊號。 The fan control system of claim 4, wherein the monitoring module comprises: an inspection unit; and a counting unit coupled to the inspection unit, wherein the inspection unit receives and detects the fan enable signal When the fan enable signal is disabled in the standby state of the computer device, the counting unit is activated to count the predetermined period, and after the predetermined period has been counted, the fan enable signal is still not enabled. Thereafter, the inspection unit provides the forced operation signal during the forced operation period, and continuously detects the fan enable signal after the forced operation period. 如申請專利範圍第5項所述之風扇控制系統,其中該檢查單元在該預定期間內偵測到該風扇致能訊號致能時,重置該檢查單元及該計數單元。 The fan control system of claim 5, wherein the inspection unit resets the inspection unit and the counting unit when the fan enabling signal is enabled during the predetermined period. 一種風扇控制方法,適用於包括風扇的一計算機裝置,該風扇控制方法包括:當在該計算機裝置的待機狀態下時,提供一風扇致能訊號、一轉速切換訊號及一第一風扇轉速訊號;依據該風扇致能訊號以決定是否提供一控制電源給予該風扇;當決定提供該控制電源給予該風扇時,依據該計算機裝置的供電情況切換一預備電源或一主要電源作為該控制電源; 依據該轉速切換訊號切換該第一風扇轉速訊號或一第二風扇轉速訊號作為該轉速控制訊號;以及該風扇受到該控制電源以及該轉速控制訊號而驅動。 A fan control method is applicable to a computer device including a fan. The fan control method includes: providing a fan enable signal, a speed switching signal, and a first fan speed signal when the computer device is in a standby state; Determining whether to provide a control power to the fan according to the fan enable signal; when deciding to provide the control power to the fan, switching a standby power source or a main power source as the control power source according to the power supply condition of the computer device; Switching the first fan speed signal or a second fan speed signal as the speed control signal according to the speed switching signal; and the fan is driven by the control power source and the speed control signal. 如申請專利範圍第7項所述之風扇控制方法,依據該計算機裝置的供電情況切換該預備電源或該主要電源作為該控制電源包括下列步驟:判斷該風扇致能訊號是否致能,且在該風扇致能訊號致能時,接收一供電致能訊號以依據該計算機裝置的供電情況提供一主要電源致能訊號及一預備電源致能訊號;當該主要電源訊號致能時,將該主要電源作為該控制電源;以及當該主要電源訊號禁能且該預備電源致能訊號致能時,將該預備電源作為該控制電源。 The fan control method of claim 7, wherein switching the preliminary power source or the main power source as the control power source according to the power supply condition of the computer device comprises the following steps: determining whether the fan enable signal is enabled, and When the fan enable signal is enabled, a power enable signal is received to provide a primary power enable signal and a preliminary power enable signal according to the power supply condition of the computer device; when the primary power signal is enabled, the primary power source is As the control power source; and when the primary power signal is disabled and the preliminary power enable signal is enabled, the standby power source is used as the control power source. 如申請專利範圍第7項所述之風扇控制方法,依據該轉速切換訊號切換該第一風扇轉速訊號或該第二風扇轉速訊號作為一轉速控制訊號包括下列步驟:接收該轉速切換訊號以及一正常運作至待機訊號,當該正常運作至待機訊號致能時,依據該轉速切換訊號提供一轉速調整訊號;產生固定時脈的脈衝寬度調變訊號以作為該第二風扇轉速訊號;以及接收並依據該轉速調整訊號切換該第一風扇轉速訊號或該第二風扇轉速訊號以作為該轉速控制訊號。 The fan control method according to claim 7, wherein the switching the first fan speed signal or the second fan speed signal as the speed control signal according to the speed switching signal comprises the following steps: receiving the speed switching signal and a normal Operating to the standby signal, when the normal operation to the standby signal is enabled, providing a rotation speed adjustment signal according to the rotation speed switching signal; generating a pulse width modulation signal of the fixed clock as the second fan rotation speed signal; and receiving and relieving The speed adjustment signal switches the first fan speed signal or the second fan speed signal as the speed control signal. 如申請專利範圍第7項所述之風扇控制方法,更包括:偵測該風扇致能訊號,當在該計算機裝置的待機狀態下偵測到該風扇致能訊號禁能時,計數一預定期間;在該預定期間已計數完畢且該風扇致能訊號仍未致能後,在該強制運轉期間內提供該強制運轉訊號;依據該強制運轉訊號以提供該控制電源至該風扇;依據該強制運轉訊號以提供該第二風扇轉速訊號作為該轉速控制訊號至該風扇;以及在該強制運轉期間後,持續偵測該風扇致能訊號。The fan control method of claim 7, further comprising: detecting the fan enable signal, and counting the predetermined time when the fan enable signal is disabled in the standby state of the computer device The forced operation signal is provided during the forced operation period after the predetermined period has been counted and the fan enable signal is still not enabled; the control power is supplied to the fan according to the forced operation signal; The operation signal is used to provide the second fan speed signal as the speed control signal to the fan; and after the forced operation period, the fan enable signal is continuously detected.
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