200843275 九、發明說明： 【發明所屬之技術領域】 特別係有關於一 本發明係有關於一種風扇控制電路， 種風扇過熱保護控制電路。 【先前技術】200843275 IX. Description of the invention: [Technical field to which the invention pertains] In particular, the invention relates to a fan control circuit, a fan overheat protection control circuit. [Prior Art]
風扇馬達在經過長期的過载營運或遭遇堵轉（機電原 因無法啟動）、火線電壓低、環境溫度高等因素影響下，: 常會出現過熱的情形，而為防止風扇馬達因過熱而燒毁: 智知之風扇控制電路大都採用複雜之溫度保護電路來防 止風扇馬達過錢毀，“越複雜之電路設計其製作成本 越高，且電路除錯之困難度亦會增加。 【發明内容】 〃本發明之主要目的在於提供—種風扇過熱保護控制 電路’其主要包含-驅動電路、—馬達線圈繞組以及一過 熱保護電路’該馬達線圈繞組係連接該驅動電路之一電壓 源，該過熱保護電路係㈣該馬達線圈繞組之卫作溫度， 、决疋忒馬達線圈繞組之工作狀態，該過熱保護電路係具 有-溫度偵測單元、一比較單元以及一開關單元，該溫度 偵测單元係可依據該馬達線圈繞組之工作溫度變化控制 =比較單元之輸出’ *該比較單元之輸出係可決^該開關 單元之ΟΝ/OFF狀態’當該開關單元呈現〇FF狀態時，風 扇係停止，反之，則風扇重新啟動運轉，本發明係可有效Under the influence of factors such as long-term overload operation or blocked (electromechanical reasons cannot be started), low hot line voltage and high ambient temperature, the fan motor often has overheating, and the fan motor is burned due to overheating: Most of the known fan control circuits use complex temperature protection circuits to prevent the fan motor from being destroyed. "The more complicated the circuit design, the higher the manufacturing cost, and the difficulty of circuit debugging." [Invention] The main purpose is to provide a fan overheat protection control circuit 'which mainly includes a driving circuit, a motor coil winding and an overheat protection circuit'. The motor coil winding is connected to a voltage source of the driving circuit, and the overheat protection circuit system (4) The operating temperature of the motor coil winding, and the working state of the motor coil winding, the overheat protection circuit has a temperature detecting unit, a comparing unit and a switching unit, and the temperature detecting unit can be based on the motor coil Winding operating temperature change control = comparison unit output ' * the comparison unit loses ^ ΟΝ Department of determination of the switch unit / OFF state "when the switch means exhibits 〇FF state, stops the fan system, otherwise, the operation of the fan is restarted, the invention may be effective
降低風扇控制電路之製作成本，且亦大幅降低電路除錯之 困難度。 S 200843275 依據本發明之風扇過熱保護控制電路，其係包含一驅 動電路、一馬達線圈繞組以及一過熱保護電路，該驅動電 路係具有一電壓源、一霍爾Ic以及一驅動Ic，該霍爾 與該驅動ic係連接該電壓源，該馬達線圈繞組係具有一 第一端及一第二端，該第一端係連接該驅動電路之該電壓 源，該過熱保護電路係偵測該馬達線圈繞組之工作溫度， 以決定該馬達線圈繞組之工作狀態，該過熱保護電路係具 有-溫度债測單元、-比較單元以及一開關單元，該比較 單元係具有一輪入側及一輸出側，該輸入側係連接該溫度 偵測單元，該輸出側係連接該開關單元，且該開關單元係 連接該馬達線圈繞組之該第二端。 【實施方式】 δ月參閱「第1圖」，其係本發明之第一較佳實施例， 一種風扇過熱保護控制電路10係包含一驅動電路u、一 馬達線圈繞組12以及一過熱保護電路13，該驅動電路u 係具有一電壓源VCC、一霍爾IC 1Uj 一驅動ic 112以 及一·電容c，該霍爾Ic m‘與該驅動π 112係連接該電 虛源VCC，忒隹爾IC i i J係具有一接地腳位，該驅 動1C 112係具有一控制腳位LD，該霍爾IC U1之該接地 腳位GND係連接該驅動ICU2之該控制腳位ld，在本實 施例中，該電容C兩端係分別連接該霍爾IC丨i丨之該接地 腳位GND與該驅動Ic 112之該控制腳位LD，該電容c 係使該驅動1C 112具有自動重新啟動（Auto restart)功能， 該馬達線圈繞組12係具有一第一端12a及一第二端nb， 200843275 該弟一端12a係連接該驅動電路11之該電壓源vcc，# 過熱保護電路13係用以偵測該馬達線圈繞組ι2之工作溫 度，以決定該馬達線圈繞組12之工作狀態（運轉或停止）， 該過熱保護電路13係具有一溫度偵測單元131、一比較單 兀132以及一開關單元133，該溫度偵測單元ΐ3ι係包含 有一熱敏電阻Rt、一第一電阻R1、一第二電阻R2以及_ 第三電阻R3，該熱敏電阻Rt係與該第一電阻R1串接， • 該熱敏電阻Rt之阻值係會隨著該馬達線圈繞組12之工作 溫度變化而改變，在本實施例中，該熱敏電阻Rt係為正 溫度係數型（Positive Tempemure Coefficient; PTC)熱敏電 阻，其阻值會隨著溫度上升而增加，且該熱敏電阻一 端係連接該驅動電路11之該電壓源vcc，該第一電阻 一端係接地，此外，該第二電阻R2係與該第三電阻R3串 接，且該第二電阻R2 —端係連接該驅動電路丨i之該電壓 源VCC，而該第三電阻R3 一端係接地。 _ 该比較單元132係具有一輸入侧1321及一輸出側 1322,該輸入側1321係連接該溫度偵測單元131，該輸出 側1322係連接該開關單元133,且該開關單元133係連接 口亥馬達線圈繞組12之該弟二端12b，在本實施例中，該比 較單70 132係為一比較器，且該比較單元132之該輸入側 1321係具有一第一輸入端1321&及一第二輸入端n2ib， 該熱敏電阻Rt與該第一電阻R1係連接該第一輸入端 1321a，該第二電阻R2與該第三電阻R3係連接該第二輸 入端1321b，此外，該開關單元133係包含有一第一電晶 8 200843275 體Q1、弟二電晶體q2、一 外 弟四電阻R4、一第五電阻R5、 一弟一二極體m以及一繁一一 — 弟—一極體D2,其中該第一電晶 體Q1與该弟二電晶體 一 ’、連接該馬達線圈繞組12之該 弟一端該第四雷卩且 Q i H # x鸲係分別連接該第一電晶體The manufacturing cost of the fan control circuit is reduced, and the difficulty of circuit debugging is greatly reduced. S 200843275 The fan overheat protection control circuit according to the present invention comprises a driving circuit, a motor coil winding and an overheat protection circuit, the driving circuit having a voltage source, a Hall Ic and a driving Ic, the Hall The voltage source is connected to the driving circuit ic. The motor coil winding has a first end and a second end. The first end is connected to the voltage source of the driving circuit, and the overheat protection circuit detects the motor coil. An operating temperature of the winding to determine an operating state of the winding of the motor coil, the thermal protection circuit having a temperature debt measuring unit, a comparing unit and a switching unit, the comparing unit having a wheel entry side and an output side, the input The side system is connected to the temperature detecting unit, the output side is connected to the switch unit, and the switch unit is connected to the second end of the motor coil winding. [Embodiment] Referring to "1", which is a first preferred embodiment of the present invention, a fan overheat protection control circuit 10 includes a driving circuit u, a motor coil winding 12, and an overheat protection circuit 13. The driving circuit u has a voltage source VCC, a Hall IC 1Uj-drive ic 112, and a capacitor c. The Hall Ic m' is connected to the driving π 112 to the electric virtual source VCC. Ii J has a grounding pin, and the driving 1C 112 has a control pin LD. The ground pin GND of the Hall IC U1 is connected to the control pin ld of the driving ICU2. In this embodiment, The two ends of the capacitor C are respectively connected to the ground pin GND of the Hall IC and the control pin LD of the driving Ic 112, and the capacitor c is such that the driving 1C 112 has an auto restart. Function, the motor coil winding 12 has a first end 12a and a second end nb, 200843275. The one end 12a is connected to the voltage source vcc of the driving circuit 11, and the overheat protection circuit 13 is used to detect the motor. The operating temperature of the coil winding ι2 to determine the motor coil The operating state (running or stopping) of the winding 12, the thermal protection circuit 13 has a temperature detecting unit 131, a comparison unit 132 and a switching unit 133. The temperature detecting unit ΐ3ι includes a thermistor Rt, a first resistor R1, a second resistor R2 and a third resistor R3, the thermistor Rt is connected in series with the first resistor R1, • the resistance of the thermistor Rt is related to the motor coil winding In the present embodiment, the thermistor Rt is a positive temperature coefficient type (PTC) thermistor, and the resistance increases as the temperature rises, and the heat is increased. One end of the sensitive resistor is connected to the voltage source vcc of the driving circuit 11. The first resistor is grounded at one end, and the second resistor R2 is connected in series with the third resistor R3, and the second resistor R2 is connected at the end. The driving circuit 丨i is the voltage source VCC, and the third resistor R3 is grounded at one end. The comparison unit 132 has an input side 1321 and an output side 1322. The input side 1321 is connected to the temperature detecting unit 131. The output side 1322 is connected to the switch unit 133, and the switch unit 133 is connected to the mouth. In the present embodiment, the comparison unit 70 132 is a comparator, and the input side 1321 of the comparison unit 132 has a first input terminal 1321 & The second input terminal 1321a is connected to the first resistor R1, the second resistor R2 and the third resistor R3 are connected to the second input terminal 1321b, and the switch unit is connected to the second input terminal 1321b. The 133 series includes a first electro-crystal 8 200843275 body Q1, a second transistor q2, a foreign four-resistor R4, a fifth resistor R5, a brother-dipole m, and a one-to-one-dipole D2, wherein the first transistor Q1 is connected to the second transistor, and the fourth node of the motor coil winding 12 is connected to the fourth node, and the Q i H # x鸲 system is respectively connected to the first transistor.
Qi與該驅動電路u之該驅 ,山扁八…4112，該第五電阻R5兩 係刀別連接該第二雷曰雜Qi and the drive circuit u of the drive, the mountain flat eight ... 4112, the fifth resistor R5 two series of blades are connected to the second thunder
Ic 卜 日日_ Q /、該驅動電路11之該驅動 K 112，该第一二極轉n .^ 體1兩^係分別連接該第四電阻R4 與該比較單元132之哕鈐ψ η 輸出側1322，以及該第二二極體 D2兩端係分別連接該第 ^ , 弟五電阻R5與該比較單元132之該 輸出側1322，在本實施例中， +曰 5亥弟一電晶體Q1與該第二 私日日體Q2係為雙載子接 下· ® 寬日日體(Bipolar Juncti〇nIc 卜日日_ Q /, the driving circuit 11 of the driving K 112, the first two-pole to n ^ ^ body 1 ^ ^ system is connected to the fourth resistor R4 and the comparison unit 132 哕钤ψ η output The side 1322 and the two ends of the second diode D2 are respectively connected to the fifth and second resistors R5 and the output side 1322 of the comparing unit 132. In this embodiment, +曰5海弟一晶晶Q1 With the second private Japanese body Q2 system is a double carrier · ® wide day body (Bipolar Juncti〇n
Transistor)，較佳地，該第一 一 Π7 /备1 νττ>\τ 1 曰 Q ，、該弟一電晶體 Q2係為ΝΡΝ型雙载子接面電晶體。 關於該風扇控制電路1G之作動方式係說明如下· …本實施例之該馬達線圈綠組12之工作溫度上升時， 邊溫度偵測單元1 3 1之哕勃％命抒 几^ 之該熱破電阻以之阻值會隨之變 化，當該馬達線圈繞組12 文 作/JHL度超過安全值（過埶 I該熱敏電…阻值係會變化至一第一限值，以使) 該：較單元132之該輸出你⑽之輪出為〇,此時，該開 關單元1 3 3之該第一電晶體Q盘 股興该弟二電晶體q2係 OFF狀態而風扇停止；反 兄 久之，當該馬達線圈繞組12 作溫度降低時，該熱敏電阻 外一 Rt之阻值亦會隨之變化至— 第二限值，以使該比較單元 — 兀132之该輸出側1322之松山 為1，此時，該開關單元133 兮 3出 之該弟一電晶體Q1與該第 9 200843275 〃體Q2係呈現〇N狀態而風扇重新啟動運 請參閱「第2圖」，其係本發 ^ π ό 弗一孝父佳實施例， -：風扇過熱保護控制電路2〇係包含一 、一 馬達線圈繞缸29丨、/ » 、 ^ 電路組成A i 賴保護電路23 °本實施例之主 與第—較佳實施例相同，其差異處僅在於 二過熱保護電…該熱敏電阻Rt係為負溫度係數型 (Negative Temperature Coefficient · ΝΤΓ^ ^ ^ 、 mcient，NTC)熱敏電阻，其阻 一曰通者溫度上升而減少，在本實施例中，該第一電阻w -：係連接該驅動電路21之該電壓源vcc，而該熱敏電 阻Rt —端係接地。 月-閱帛3圖」’其係本發明之第三較佳實施例， 一種風扇過熱保護控制電路30係包含一驅動電路31、一 馬達線圈繞組32以及_過㈣護電路33。本實施例之主 電路組成基本上㈣-較佳實施例相同，其差異處僅在於 該過熱保遵電路33之該第一電晶體qi肖該第二電晶體 Q2係為金氧半導場效電晶體（m〇s Transistor)，且較佳地，該第_電晶體qi與該第二電晶體 Q2係，空乏式(Depleti〇n _心）金氧半導場效電晶體。 明多閱第4圖」’其係本發明之第四較佳實施例， 一種風扇過熱保護控制電路4〇係包含一驅動電路41、一 馬達線圈、繞、址42以及-過熱保護電4 43。本實施例之主 包路組成基本上與第二較佳實施例相同，其差異處僅在於 該過熱保護電路43之該第一電晶體Q1與該第二電晶體 Q2係為金氧半導場效電晶體（m〇s Fi^d_E也ct ίο 200843275Transistor), preferably, the first Π7 / 备1 νττ > \τ 1 曰 Q , and the transistor Q2 is a 双-type bipolar junction transistor. The operation mode of the fan control circuit 1G is as follows: When the operating temperature of the motor coil green group 12 of the embodiment increases, the temperature of the temperature detecting unit 1 3 1 is broken. The resistance of the resistor will change accordingly. When the motor coil winding 12 is written as /JHL degree exceeds the safe value (the thermal resistance of the resistor is changed to a first limit, so that): Compared with the output of unit 132, the output of (10) is 〇. At this time, the first transistor Q of the switch unit 1 3 3 is in the OFF state of the second transistor q2 and the fan is stopped; When the temperature of the motor coil winding 12 is lowered, the resistance value of the external Rt of the thermistor will also change to the second limit value, so that the output side of the comparison unit 兀132 is 13 At this time, the switch unit 133 兮3 outputs the transistor Q1 and the ninth 200843275 body Q2 system in the 〇N state and the fan restarts. Please refer to "Fig. 2", which is the same as the π弗 弗一孝父佳佳example, -: Fan overheat protection control circuit 2 包含 contains one, one horse The coil winding cylinder 29丨, / » , ^ circuit composition A i 赖 protection circuit 23 ° This embodiment is the same as the first preferred embodiment, the difference is only in the two overheat protection... The thermistor Rt The negative temperature coefficient type (Negative Temperature Coefficient · ΝΤΓ ^ ^ ^, mcient, NTC) thermistor is reduced in temperature of the resistor, and in the embodiment, the first resistor w -: is connected to the The voltage source vcc of the driving circuit 21, and the thermistor Rt is grounded. According to a third preferred embodiment of the present invention, a fan overheat protection control circuit 30 includes a drive circuit 31, a motor coil winding 32, and a _over (four) protection circuit 33. The main circuit composition of this embodiment is basically the same as (4)-the preferred embodiment, and the difference is only in the first transistor qi of the overheat protection circuit 33, and the second transistor Q2 is a MOSFET. A transistor (m〇s Transistor), and preferably, the first transistor qi and the second transistor Q2 are depleted (depleti〇n_heart) MOS transistors. 4, which is a fourth preferred embodiment of the present invention, a fan overheat protection control circuit 4 includes a driving circuit 41, a motor coil, a winding, an address 42 and an overheat protection 4 43 . The main package configuration of this embodiment is basically the same as that of the second preferred embodiment, except that the first transistor Q1 and the second transistor Q2 of the overheat protection circuit 43 are MOSFETs. Effect transistor (m〇s Fi^d_E also ct ίο 200843275
Transistor) ’且較佳地，該第一電晶體Q1與該第二電晶體 Q2係為空乏式（Depleti〇n m〇de)金氧半導場效電晶體。 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，任何熟知此項技藝者，在不脫離本發明之精神和 耗圍内所作之任何變化與修改，均屬於本發明之保譁 圍。 π & 【圖式簡單說明】 扇過熱保 第1圖：依據本發明之第一較佳實施例，一種 護控制電路。 弟2圖·依據本發明之第二較佳實施_，一種風扇過熱保 護控制電路。 _ ^' 過熱保 弟3圖：依據本發明 链_ 七月之弟二較佳實施例，一種風扇 護控制電路。 第4圖：依據本發 之弟四車乂佳貫施例，一種風扇過熱保 護控制電路。 ’' 【主要元件符號說明】 驅動電路 112 驅動I c 馬達線圈繞組 12b 第二端 4〇風扇過熱保護控制電路 11 、 21 、 31 、 41The first transistor Q1 and the second transistor Q2 are depleted MOSFETs. The scope of the present invention is defined by the scope of the appended claims, and any changes and modifications made by those skilled in the art without departing from the spirit and scope of the invention are哗围. π & [Simplified illustration] Fan overheat protection Fig. 1 is a protection control circuit in accordance with a first preferred embodiment of the present invention. Figure 2 is a second embodiment of the present invention, a fan overheat protection control circuit. _ ^' Overheated Brother 3: According to the present invention, a preferred embodiment of the seventh embodiment, a fan protection control circuit. Figure 4: A fan overheat protection control circuit based on the example of the four-car 乂 贯 。. ’' [Main component symbol description] Drive circuit 112 Drive I c Motor coil winding 12b Second end 4〇 Fan overheat protection control circuit 11 , 21 , 31 , 41
111 霍爾1C 12 、 22 、 32 、 42 12a 第一端 過熱保護電路 溫度偵測單元 13 21輸入側 13 、 23 、 33 、 43 131 132 比較單元 1321a第一輸入端1321b第二輸入端 11 200843275 1322 輸出侧 133 開關單元 VCC 電壓源 GND 接地腳位 LD Rt 熱敏電阻 R1 第一電阻 R2 R3 第三電阻 R4 第四電阻 R5 Q1 第一電晶體 Q2 第二電晶體 C D1 第一二極體 D2 第二二極體 控制腳位 第二電阻 第五電阻 電容111 Hall 1C 12, 22, 32, 42 12a First end overheat protection circuit temperature detection unit 13 21 Input side 13 , 23 , 33 , 43 131 132 Comparison unit 1321a First input 1321b Second input 11 200843275 1322 Output side 133 Switch unit VCC Voltage source GND Ground pin LD Rt Thermistor R1 First resistor R2 R3 Third resistor R4 Fourth resistor R5 Q1 First transistor Q2 Second transistor C D1 First diode D2 Diode body control pin second resistor fifth resistor and capacitor
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