1362182 九、發明說明： 【發明所屬之技術領域】 本發明係有關一種可彈性調整馬達驅動電流波形之控 制器與方法。 【先前技術】 馬達常見的一種應用是驅動風扇。在風扇系統應用上， 馬達驅動電流波形會影響到風扇運轉之平穩度，噪音及運轉 效率。目前風扇控制系統係依據霍爾(HALL)感應器輸出訊號 (霍爾訊號）以決定驅動電路之訊號切換，亦即根據霍爾訊 號產生脈寬調變驅動控制訊號（PWM驅動訊號），驅動馬達 運轉。 先前技術中，當馬達驅動電流波形不佳造成風扇運轉效 專不好時，主要以兩種方式來解決：其一是調整霍爾感應器 之位置以提前或延後驅動電路之訊號切換，其二是以硬體電 路方式來改變PWM驅動訊號，以調整馬達驅動電流波形。 使用調整霍爾感應器之位置之方法，請參考第丨圖，因 此種先前技術中，PWM驅動訊號的切換時間點緊隨霍爾訊 號的上升緣和下降緣（如第1圖之第一個方波，PWM驅動 訊號之上升緣P1和下降緣P2與霍爾訊號之上升緣H1和下 降緣H2完全同時）’故必須更改電路板上霍爾感應器之置放 位置，以調整PWM驅動訊號的切換時點。但不同風扇之特 性不同’隨著不同之風扇特性，需有不同之擺放位置，執行 上費時且增加開發成本。且此方法一般以風扇全速運轉時觀 察馬達驅動電流波形，以決定霍爾感應器之置放位置，钽風 5 1362182 羽^低速運轉時會有電流過高運轉效率不佳之問題。1362182 IX. Description of the Invention: [Technical Field] The present invention relates to a controller and method for elastically adjusting a motor drive current waveform. [Prior Art] One common application of a motor is to drive a fan. In fan system applications, the motor drive current waveform affects the smoothness, noise and operating efficiency of the fan. At present, the fan control system is based on the Hall (HALL) sensor output signal (Hall signal) to determine the signal switching of the driving circuit, that is, the pulse width modulation driving control signal (PWM driving signal) is generated according to the Hall signal, and the driving motor is driven. Running. In the prior art, when the motor drive current waveform is not good and the fan operation efficiency is not good, the solution is mainly solved in two ways: one is to adjust the position of the Hall sensor to advance or delay the signal switching of the drive circuit, The second is to change the PWM drive signal by the hardware circuit to adjust the motor drive current waveform. For the method of adjusting the position of the Hall sensor, please refer to the figure. Therefore, in the prior art, the switching time of the PWM driving signal follows the rising edge and the falling edge of the Hall signal (as shown in the first figure of FIG. 1). Square wave, the rising edge P1 and the falling edge P2 of the PWM driving signal are completely at the same time as the rising edge H1 and the falling edge H2 of the Hall signal. Therefore, the position of the Hall sensor on the circuit board must be changed to adjust the PWM driving signal. The point of switching. However, the characteristics of different fans are different. Depending on the fan characteristics, different placement positions are required, which is time consuming and increases development costs. In this method, the motor drive current waveform is generally observed when the fan is running at full speed to determine the placement position of the Hall sensor, and the hurricane 5 1362182 feathers may have a problem of poor current efficiency when operating at a low speed.
第一種方法是以電路方式來改變p觀 參考美國專利第聊584號，其電路示於第2圖，在該= =提早PWM驅動訊號之關閉時間(〇fr㈣而產生圖中之訊 =4 ’但_銷对肖不如完全解決馬翻動電流波形 ^的問題’請參見第3圖，當根據㈣訊號之正負半周皆 生PWM驅動訊號，且提前關閉pWM驅動訊號時，馬 驅動電流波形將出現不平均的現象（如標號C1，C2所示）， 需要改善。此外，該方法需更改硬體電路之設計，執行上盘 :述調整霍爾感應器位置之方法一樣，費時且增加開發成 除上述缺料，在上述_财方法巾，當馬達驅動電 =波形出現不同«訊號狀態，有*同之電流波形時，例如 前述馬達驅動電流波形不平均時，或因不同風扇造成不同波 形時；因其㈣電路之切換方式已固定，無法在不同應用狀 況下依據不同霍爾訊號來調整驅動電路之切換時間點，故除 非更改硬體，㈣無法改善因騎轉·波形不平均造成 風扇運轉不平穩之問題。 【發明内容】 有鑑於此，本發明之第-目的即在於提供一種可彈性調 整馬達驅純赦狀控繼’以改善先前技術的缺點。 本發明之第二目的在於提供可彈性調整馬達驅動 波形之控制方法。 1362182 根據本發明之其中一個觀點，乃是提供了一種可彈性調 整馬達驅動電流波形之控制H，其供應PWM減給一馬達 驅動電路，該控制器包含：馬達轉速周期測量單元，其接收 與一馬達有關之訊號並根據之而測量該馬達的轉速與周 期；PWM tfl紐前延遲計算單元，其接收複數健制參數 和馬達轉速周期測量單元之輸出，根據之而計算所述The first method is to change the reference point of the U.S. Patent No. 584. The circuit is shown in Figure 2, where the == early PWM drive signal is turned off (〇fr(4) and the picture is generated = 4 'But _ pin to Xiao is better than completely solve the problem of horse flipping current waveform ^ Please refer to Figure 3, when the PWM drive signal is generated according to the positive and negative half cycles of the (4) signal, and the pWM drive signal is turned off in advance, the horse drive current waveform will appear The average phenomenon (as indicated by the labels C1 and C2) needs to be improved. In addition, the method needs to change the design of the hardware circuit, and the implementation of the upper disk: the method of adjusting the position of the Hall sensor is the same, time-consuming and increased development is in addition to the above Lack of material, in the above-mentioned method, when the motor drive power = waveform appears different «signal state, there is * the same current waveform, for example, when the motor drive current waveform is uneven, or different waveforms caused by different fans; The switching mode of the (4) circuit is fixed, and the switching time of the driving circuit cannot be adjusted according to different Hall signals under different application conditions, so unless the hardware is changed, (4) cannot be improved. In view of the above, the first object of the present invention is to provide an elastically adjustable motor drive pure control to improve the disadvantages of the prior art. A second object of the present invention is to provide a control method for elastically adjusting a motor drive waveform. 1362182 According to one aspect of the present invention, there is provided a control H for elastically adjusting a motor drive current waveform, which supplies a PWM subtraction to a motor a driving circuit, the controller comprising: a motor speed period measuring unit that receives a signal related to a motor and measures a speed and a period of the motor according to the PWM; and a PWM tfl front delay calculating unit that receives the plurality of health parameters and the motor The output of the speed cycle measuring unit, according to which the calculation is
PWM 訊號之提如關閉(Ofi)和延後打開(On)時間；以及PWM訊號 產生單元，其根據PWM訊號提前延遲計算單元之輸出，產 生所述PWM訊號；其中該PWM訊號提前延遲計算單元為 韌體(firmware)程式。 根據本發明之另一觀點，乃是提供了一種可彈性調整馬 達驅動電流波形之控制方法，應用於一控制器中，該控制器 供應PWM訊號給一馬達驅動電路，所述控制方法包含： 接收與一馬達有關之訊號並根據之而測量該馬達的轉速與 周期；接收複數個控制參數，根據之和馬達的轉速與周期而 s十真所述PWM訊號之提前關閉(〇均和延後打開(〇n)時間； 以及產生所述PWM訊號。 以上所述控制器與方法中，該與一馬達有關之訊號可為 霍爾訊號，而該PWM訊號較該霍爾訊號之轉態點延後打 開、較該霍爾訊號之次一轉態點提前關閉，其延後打開時間 和提前關閉時間可根據控制參數之一、霍爾訊號之周期、和 既疋之馬達極速來決定。 在其中一種實施態樣中，以上所述控制器與方法中之 PWM訊號包含四組訊號，且所述馬達驅動電路包含四個電 7 1362182 晶體，該四組訊號分別控制該四個電晶體之閘極。較佳地， 該四個電晶體兩兩串聯，兩串聯電晶體間的互連節 連接於-馬達之兩端’兩串聯電晶體非互連_點則分別與 電源和地電連接，且其中，所述四組訊號控制該四個電晶體 之閘極’使得在-段時間中，與電源電連接的兩電晶體皆關 閉，而與地電連接的兩電晶體皆導通。 底下藉由具體實施例配合所附的圖式詳加說明，當更容 易瞭解本發明之目的、技術内容、特點及其所達成之功效。 【實施方式】 首先請參考第4圖，本發明之可雜調整馬達驅動電流波形 之控制器ίο，可用以控制一馬達驅動電路4〇，該馬達驅動 電路40驅動一馬達’此馬達例如為風扇馬達5〇，但當然亦 可為其他馬達；該馬達產生霍爾訊號回饋至控制器1〇之内。 控制器ίο中，包含馬達轉速周期測量單元u，PWM訊號提 前延遲計算單元12，和PWM訊號產生單元13。馬達轉速周 量單元11根據霍爾訊號計算馬達轉速周期；PWM訊號 提别延遲计算單元12根據馬達轉速周期測量單元u的測量 結果，並根據外部輸入之控制參數tda，tdb，屯屯tpb (容後詳 述）計算PWM驅動訊號之提前關閉(〇ff)和延後打開(〇11)時 間，PWM訊號產生單元13根據霍爾訊號、以及pwM訊號 提刚延遲4算單元12之輸出’而修正#所供應給馬達驅動 電路40的PWM|g動訊號。冑注意的是，在本發明之較佳方 式中’馬達轉速周期測量單元U和p麵賴提前延遲計算 8 1362182 早疋係為控制器中之韋刃體(firmware)程式’而非固定不易 變更之硬體電路，因此控制器 10可彈性地依據不同風扇特 性輪入複數個不同控制參數，該控制器即以該複數個參數及 風扇目前轉速’依據不同霍爾訊號狀態調整PWM驅動訊號 之提前關閉及延後打開之時間，使風扇運轉在驅動電流波形 最佳狀態之下。上述優點，將於後文中予以詳細解釋。The PWM signal is raised as (Ofi) and delayed (On) time; and the PWM signal generating unit generates the PWM signal according to the output of the PWM signal advance delay calculation unit; wherein the PWM signal advance delay calculation unit is Firmware program. According to another aspect of the present invention, a control method for elastically adjusting a motor drive current waveform is provided, which is applied to a controller that supplies a PWM signal to a motor drive circuit, the control method comprising: receiving a motor-related signal and measuring the speed and period of the motor according to the same; receiving a plurality of control parameters, according to the speed and cycle of the motor, and the PWM signal is turned off early (〇 and delay open) (〇n) time; and generating the PWM signal. In the above controller and method, the signal related to a motor may be a Hall signal, and the PWM signal is delayed from the transition point of the Hall signal Open, close to the next transition point of the Hall signal, and the delay opening time and the early closing time can be determined according to one of the control parameters, the period of the Hall signal, and the speed of the motor. In an embodiment, the PWM signal in the controller and method includes four groups of signals, and the motor driving circuit includes four electric 7 1362182 crystals, and the four groups of signals are divided into four groups of signals. Controlling the gates of the four transistors. Preferably, the four transistors are connected in series, and the interconnections between the two series transistors are connected to the ends of the motor - the two series transistors are not interconnected. Connected to the power source and the ground respectively, and wherein the four groups of signals control the gates of the four transistors such that during the period of time, both transistors electrically connected to the power source are turned off, and are electrically connected to the ground. Both of the transistors are turned on. The purpose of the present invention, the technical contents, the features, and the effects achieved by the present invention will be better understood by the specific embodiments and the accompanying drawings. [Embodiment] 4, the controller of the present invention for adjusting the motor drive current waveform can be used to control a motor drive circuit 4, which drives a motor, such as a fan motor 5, but of course For other motors, the motor generates a Hall signal feedback to the controller 1 . The controller ίο includes a motor speed period measuring unit u, a PWM signal advance delay calculating unit 12, and a PWM signal generating unit 13 The motor speed measuring unit 11 calculates the motor speed period according to the Hall signal; the PWM signal stepping delay calculating unit 12 measures the measuring result of the unit u according to the motor speed period, and according to the external input control parameter tda, tdb, 屯屯tpb ( After detailed description of the PWM drive signal, the PWM signal generation unit 13 delays the output of the unit 12 based on the Hall signal and the pwM signal, while calculating the early turn-off (〇ff) and the delay-on (〇11) time of the PWM drive signal. Correction # is supplied to the PWM|g signal of the motor drive circuit 40. Note that in the preferred mode of the present invention, the 'motor speed period measuring unit U and the p-side delay delay calculation 8 1362182 are early control The firmware program in the device is not a fixed hard-to-change hardware circuit, so the controller 10 can flexibly switch a plurality of different control parameters according to different fan characteristics, and the controller uses the plurality of parameters and The current fan speed 'adjusts the early closing time and the delay time of the PWM driving signal according to different Hall signal states, so that the fan runs under the optimal state of the driving current waveform. The above advantages will be explained in detail later.
請參閱第5圖，在本發明中，PWM驅動訊號不僅可調整 提前其關閉時間，亦可調整延後其打開時間。首先說明定 義：霍爾訊號之高電位以HA表示，霍爾訊號之低電位以Hg 表示；當霍爾訊號由低電位HB轉態為高電位HA時，PWM 驅動訊號對應於霍爾訊號HB—HA轉態點之提前關閉時間 以下標pb表示，延後打開時間以下標血表示，當霍爾訊號 由高電位HA轉態為低電位hb時，pwM驅動訊號對應於 霍爾訊號HA—HB轉態點之提前關閉時間以下標pa表示， 延後打開時間以下標db表示，亦即對於包含^、朋之第 一周期T，PWM驅動訊號將延後打開(Tda)、提前關閉(Τρ&)、 延後打開(Tdb)、捷前關閉(Tpb);對於包含第二周期T，，pWM 驅動訊號將延後打開(T’da)、提前關閉(T，pa)、延後打開 (T’db)、提前關閉(T’pb);依此類推。 對第二個霍爾訊號周期Τ’而言，控制器1G中之馬達轉速 周期測量單元11，會測量霍爾訊號前一次周期τ，PWM訊 號提前延遲計算單元丨2再依據所輪人之提前(tpa，tpb)延遲 (tda，tdb)控制參數及前一次周期T計算出T，da，T，pa , T，db 及T’pb’另外會計算出在目前霍爾訊號周期τ’内，pWM驅 9 1362182 動訊5虎之切換點Q H，j，j之切換時間點t，q T，H，pi，rj， 在較簡單的形式巾’其計算公式例如可為 T’da = tda T’pa = tpa TMb = tdb T^b = tpb T’G = T’da ΤΉ = T/2 - T，pa ΤΊ = T/2 + T5db T，J = T - T，pb afu虎產生單疋u再依據切換時間點T，^ ΤΉ，π，T，J 片算值及馬達轉迷周期測量單元U之目前霍爾訊號周期 f出值’於適當時間點切換PWM驅動控制訊號 ’再將此訊 號輸出給馬達驅動電路♦以推動風扇馬達50使風扇運轉。 在更精確的形式中，上述T，da，T，pa，T，db及T，pb之值 可依風扇馬達轉速做調整，以改善風扇在低速運轉時電流過 兩運轉效率不佳之問題。絲目標風扇對應PWM驅動控制 =全開之極料φΙηίΜΤ ’鱗所設輯紅提前延遲控 制參數為tdMdb，tpa及tpb，且霍爾訊號前一次周期為τ， T da = tda / (rpmLMT * T) T pa = tpa / (rpmLMT * T) T db = tdb / (rpmLMT * T) T pb = tpb / (rpmLMT * T) T’G = T，da T，H = T/2-rpa ri = T/2 + rdb T’J =T-T，pb 。如此，在本發明中，當發現在不同霍爾訊號狀態下，馬 達驅動電流波形丨現有不狀電流波形，即馬雜動電流波 形不平均時，可透過調整提前延遲控制參數tda, tdb, tpa及 tpb，將風扇驅動電流波形調整至最佳平衡狀態，而不必更動 硬體電路。 ’ 請參考第6圖’其為控制器1〇之應用實施例之一，顯示 驅動電路4G ’其包含四個兩兩串聯的電晶體AH，AL，BH， BL ’兩串聯電晶體間的互連節點分別電連接於風扇馬達％ 之兩端’兩串聯電晶體非互連的端點則分別與電源VDD和 地電連接。㈣H 10触喻PWM驅動喊pwM/AH、 PWM/AL· PWM/BH' PWM/BL ’分別控制電晶體仙，从，BH， BL之間極，其原理為依據霍爾訊號，交互切換風扇馬達電 流方向’在霍爾訊號為高電位的時間内，使電晶體ah和π 導通’在霍爾訊號為低電位的時間内，使電晶體bh和从Referring to Fig. 5, in the present invention, the PWM driving signal can be adjusted not only in advance of its closing time but also in delaying its opening time. First, the definition is as follows: the high potential of the Hall signal is represented by HA, and the low potential of the Hall signal is represented by Hg; when the Hall signal is changed from the low potential HB to the high potential HA, the PWM driving signal corresponds to the Hall signal HB— The early closing time of the HA transition point is indicated by the following pb, and the following blood is indicated after the delay opening time. When the Hall signal is changed from the high potential HA to the low potential hb, the pwM driving signal corresponds to the Hall signal HA-HB turn. The early closing time of the state point is indicated by the following mark pa, and the delay opening time is indicated by the following db, that is, for the first period T including ^, friends, the PWM driving signal will be delayed (Tda), early closed (Τρ&), Delayed open (Tdb), pre-deactivation (Tpb); for the second period T, pWM drive signal will be delayed open (T'da), early closed (T, pa), delayed open (T'db ), close early (T'pb); and so on. For the second Hall signal period ,', the motor speed period measuring unit 11 in the controller 1G measures the previous period τ of the Hall signal, and the PWM signal advance delay calculating unit 丨2 is based on the advance of the wheel (tpa, tpb) delay (tda, tdb) control parameters and the previous period T calculate T, da, T, pa, T, db and T'pb' additionally calculated in the current Hall signal period τ', pWM Drive 9 1362182 Motivation 5 Tiger switching point QH, j, j switching time point t, q T, H, pi, rj, in a simple form towel 'its calculation formula can be T'da = tda T' Pa = tpa TMb = tdb T^b = tpb T'G = T'da ΤΉ = T/2 - T,pa ΤΊ = T/2 + T5db T,J = T - T,pb afu tiger produces single 疋u again According to the switching time point T, ^ ΤΉ, π, T, J calculation value and the current period of the motor cycle period measurement unit U, the value of the current Hall signal period f is 'switch the PWM drive control signal at the appropriate time point' and then output the signal. The motor drive circuit ♦ is driven to drive the fan motor 50 to operate the fan. In a more precise form, the values of T, da, T, pa, T, db, and T, pb can be adjusted according to the fan motor speed to improve the efficiency of the fan during low speed operation. The wire target fan corresponds to the PWM drive control = full open material φ Ι ΜΤ ΜΤ ΜΤ 鳞 'scale set red advance delay control parameters are tdMdb, tpa and tpb, and the previous period of the Hall signal is τ, T da = tda / (rpmLMT * T) T pa = tpa / (rpmLMT * T) T db = tdb / (rpmLMT * T) T pb = tpb / (rpmLMT * T) T'G = T,da T,H = T/2-rpa ri = T/ 2 + rdb T'J = TT, pb. Thus, in the present invention, when it is found that the motor drive current waveform 丨 existing current waveforms in different Hall signal states, that is, the horse noise current waveform is not uniform, the advance delay control parameters tda, tdb, tpa can be adjusted. And tpb, adjust the fan drive current waveform to the best balance without having to change the hardware circuit. 'Please refer to FIG. 6 'which is one of the application examples of the controller 1 ′, the display driving circuit 4G ′′, which includes four pairs of transistors AH, AL, BH, BL 'between two series transistors The connecting nodes are electrically connected to the two ends of the fan motor % respectively. The two non-interconnecting ends of the series transistors are electrically connected to the power source VDD and the ground respectively. (4) H 10 touch-talk PWM drive shouting pwM/AH, PWM/AL·PWM/BH' PWM/BL' respectively control the transistor, from the BH, BL pole, the principle is based on the Hall signal, interactively switch the fan motor The current direction 'turns on the transistors ah and π during the time when the Hall signal is high,' causes the transistor bh and the slave to be low during the time when the Hall signal is low.
II 1362182 導通。 第6圖電路中之驅動訊號之波形可參考第7圖：如II 1362182 is on. The waveform of the driving signal in the circuit of Figure 6 can be referred to Figure 7:
圖所示’在 Tpa，Tpb，T，pa, T，pb，T，，pa，T，，pb 時間内 PWM/AH 及PWM/BH皆在低電位，PWM/AL及pwM/BL皆在高電 位’如此會使第6圖中之驅動電路4〇上臂（電晶體a^bh) 全在關閉狀態，而下臂（電晶體AL，BL)全在導通狀態，如 此可使風扇運轉時所產生之反電動勢（Back dectr〇m〇tive force)電壓，有效地透過驅動電路下臂之全導通使其降低， 避免此電壓疊加在電源而使電源突波過高。 第8圖表不與第7圖PWM驅動訊號對應之馬達驅動電 机波开>，當原始電流波形81之突波過高時，可透過設定 rpmLMT及與此對應之PWM提前關閉控制參數及tpb 來有效地降低馬達驅動電流突波，如果修正後之馬達驅動電 流波形82不平均時’可透過設定不同之pwM延遲打開控制 參數tda及tdb來調整馬達驅動電流，將波形調整至最佳平 衡狀態（波形83)。當然’如果馬達驅動電流波形82已平均， 則可將控制參數為tda及tdb設定為適當之相等值。此調整 過程可使用電腦應用程式於風扇運轉中動態調整，使馬達驅 動電流波形之調整變的非常有鱗，當所有鋪參數皆調整 完畢且域定’再將所有控制參數存入控制器1〇中，使風扇 運轉在驅動電流波形最佳狀態之下。 另外，如果原始電流波形81中並無如第8圖之電流突 f現象’則可將tpa及tpb設為〇，亦即關閉ρψΜ訊號提 前關閉之功能，換言之使用本發明之控制器1〇，可就現有應 12 ί £] 1362182 用狀況作各種調整，根據電路板上霍爾感應器之置放位置， 設定控制參數(rpmLMT, tpa，tpb，tda，tdb)來有效地彈性調整 馬達驅動電流波形，而不必更改電路板上霍爾感應器之置放 位置及硬體電路之設計。 綜上所述，本發明相較於先前技術，至少有以下的優 點：一、應用便利，可適用於現有的應用環境，僅需變更控As shown in the figure 'PWM, AH and PWM/BH are at low potential in Tpa, Tpb, T, pa, T, pb, T,, pa, T, and pb, PWM/AL and pwM/BL are high. The potential 'this will cause the upper arm (transistor a^bh) of the driving circuit 4 in Fig. 6 to be fully turned off, and the lower arm (transistor AL, BL) is all in the on state, so that the fan can be generated during operation. The back ecttr〇m〇tive force voltage is effectively reduced by the full conduction of the lower arm of the drive circuit, so that the voltage is superimposed on the power supply and the power supply surge is too high. The eighth graph does not open the motor drive motor corresponding to the PWM drive signal of FIG. 7. When the surge of the original current waveform 81 is too high, the control parameter and tpb can be turned off by setting the rpmLMT and the corresponding PWM. To effectively reduce the motor drive current glitch, if the corrected motor drive current waveform 82 is uneven, 'the motor drive current can be adjusted by setting the different pwM delay to open the control parameters tda and tdb, and the waveform is adjusted to the optimal balance state. (Waveform 83). Of course, if the motor drive current waveform 82 is averaged, the control parameters tda and tdb can be set to appropriate equal values. This adjustment process can be dynamically adjusted during the operation of the fan using the computer application, so that the adjustment of the motor drive current waveform becomes very scaly. When all the paving parameters are adjusted and the domain is set, then all the control parameters are stored in the controller. The fan is operated under the optimum state of the drive current waveform. In addition, if the current current waveform 81 does not have the current phenomenon f as shown in FIG. 8 , tpa and tpb can be set to 〇, that is, the function of turning off the ρ ψΜ signal in advance, that is, using the controller 1 of the present invention, Various adjustments can be made to the existing condition of 12 ί £] 1362182. According to the placement position of the Hall sensor on the circuit board, the control parameters (rpmLMT, tpa, tpb, tda, tdb) are set to effectively adjust the motor drive current. Waveform without having to change the placement of the Hall sensor on the board and the design of the hardware circuit. In summary, the present invention has at least the following advantages over the prior art: First, the application is convenient, and can be applied to an existing application environment, and only needs to be changed.
制參數而私更改硬體；二、可_決馬達鶴電流波形^ 平均的問題。 匕很據實知例說明本發明之技術思想及特點，唯其 目的僅係為使鮮此項之人士_瞭縣發明之内^ 並據以實施’料能狀限定本發明之專利細。例如，本 發明不限域祕風扇馬達，任何馬衫屬b可應用本發 明。又如’第6 _示電路中的電晶體可以為丽⑽、 、或PNP、卿雙載子電晶體，且其數目可以依包裝 而不為四個。因此凡依本發明所揭示之精神所作之 ϋ化絲飾，補涵蓋在本發明之專利範圍内。 【圖式簡單說明】 第2圖分別說明兩種調整馬達驅動電流波形之先肯 第3圖說明先前技術的問題。 翻之可雜游騎购驗賴之控如 第5 _蝴瞻_顺_輪4雇娜 13 1362182 號。 第6圖舉例示出本發明可躺來控制之驅動電路⑽的結構 第7圖說明控制驅動電路40的各pwm驅動訊號之波形。 第8圖說明本發明之效果。 【主要元件符號說明】 10可彈性調整馬達驅動電流波形之控制器 11馬達轉速周期測量單元 12 PWM訊號提前延遲計算單元 13PWM訊號產生單元 3〇先前技術電路 32驅動電路（先前技術） 34風扇馬達（先前技術） 36相位補償電路（先前技術） 38計時器（先前技術） 40馬達驅動電路 42, 44訊號（先前技術） 50馬達風扇 81,82, 83馬達驅動電流波形 AH,AL，BH，BL 電晶體 14 [ S ]The parameters are changed privately; the second is _ _ _ motor crane current waveform ^ average problem. The technical idea and the features of the present invention are described by way of example only, and the purpose of the invention is only to enable the person of the present invention to make the patent of the present invention. For example, the present invention is not limited to a domain fan motor, and any vestibule b can be applied to the present invention. In another example, the transistor in the sixth circuit can be a MN (10), or a PNP, a binary bipolar transistor, and the number can be packaged instead of four. Therefore, the embossed silk embossing made in accordance with the spirit of the present invention is covered by the patent of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 2 illustrates two prior art adjustments of the motor drive current waveforms. Fig. 3 illustrates the problems of the prior art. The control of the rushing ride can be verified as the 5th _ _ _ _ _ _ round 4 hire Na 13 1362182. Fig. 6 is a view showing an example of the structure of the drive circuit (10) for controlling the reclining of the present invention. Fig. 7 is a view showing the waveforms of the respective pwm drive signals for controlling the drive circuit 40. Fig. 8 illustrates the effects of the present invention. [Main component symbol description] 10 controller capable of elastically adjusting motor drive current waveform 11 motor speed period measuring unit 12 PWM signal advance delay calculating unit 13 PWM signal generating unit 3 〇 prior art circuit 32 driving circuit (prior art) 34 fan motor ( Prior Art) 36 Phase Compensation Circuit (Prior Art) 38 Timer (Prior Art) 40 Motor Drive Circuit 42, 44 Signal (Prior Art) 50 Motor Fan 81, 82, 83 Motor Drive Current Waveform AH, AL, BH, BL Crystal 14 [ S ]