TW591884B

TW591884B - Commutation detection device of non-sensor brushless DC motor and its method

Info

Publication number: TW591884B
Application number: TW92112913A
Authority: TW
Inventors: Ying-Tsan Lin; Ying-Yu Tzou
Original assignee: Univ Nat Chiao Tung
Priority date: 2003-05-13
Filing date: 2003-05-13
Publication date: 2004-06-11
Also published as: TW200425633A

Abstract

The present invention discloses a commutation detection device of non-sensor brushless DC motor and its method. The design employs hybrid signal integrated circuit technique. The core is composed of a multiplexer, a remainder amplifier and a zero-crossing detector. The multiplexer is a digital circuit, which selects a stator signal with non-excited phase. The remainder amplifier calculates back electromotive force of non-excited phase by the non-excited phase and stator signals of another two phases. The zero-crossing detector is able to detect the zero-crossing point of the back electromotive force of non-excited phase, and generate a zero-crossing signal. This signal is phase-delayed by 30 DEG to become the commutation signal of the motor, so as to solve the problem of the non-sensor commutation control in the conventional skill.

Description

591884591884

五、發明說明（1) 一、【發明所屬之技術領域】本發明係有關一種三相益別* — x D 相無刷直流馬達（Three-PhaseV. Description of the invention (1) 1. [Technical field to which the invention belongs] The present invention relates to a three-phase phase separation * — x D phase brushless DC motor (Three-Phase

Brushless DC Motors )換相松珠丨 t 认 _ ^ A ^ ^ ? 換相彳工制訊號的偵測，特別是關 ^ ^ . . ^ ^ ^ t ”頦比積體電路技術之無感測無刷直馬達的換相偵測裝置及其方法。二、【先前技術】Brushless DC Motors Commutation detection device and method for straightening motor 2. Second, [prior art]

、三相無刷直流（BLDC )馬達係藉由霍爾感測元件回授馬$轉子位置，所以僅能藉由霍爾感測元件的回授訊號，估算馬達的轉速，以進行速度控制；然而，在特定的場合下，感測元件不容易安裝，或是週遭環境的溫度會造成感測元件的可靠性降低，遂發展出另一種無感測器三相無刷直流馬達。無感測為B L D C馬達之電流換相控制電路係使用反抗電動勢（Back Electromotive Force)，其係形成於一定子線圈之未激發相位中，以取代霍爾感測訊號；特別是在感測到反抗電動勢與中性點相交，以及使用零交越點來偵測出馬達轉子的區間位置，且零交越點之相位只要延遲3 〇度即為B L D C馬達之換相訊號。The three-phase brushless DC (BLDC) motor uses the Hall sensor to feedback the rotor position, so it can only estimate the speed of the motor for speed control by the feedback signal from the Hall sensor. However, in certain occasions, the sensing element is not easy to install, or the temperature of the surrounding environment will cause the reliability of the sensing element to decrease. Therefore, another sensorless three-phase brushless DC motor has been developed. The BLDC motor-less current commutation control circuit uses Back Electromotive Force, which is formed in the non-excitation phase of a certain sub-coil to replace the Hall sensing signal; especially when resistance is sensed The emf intersects the neutral point, and uses the zero-crossing point to detect the interval position of the motor rotor, and the phase of the zero-crossing point is delayed by 30 degrees as the commutation signal of the BLDC motor.

由於無刷直〉’II»馬達應用產業中之發展相當受到重視，遂有許多相關之技術已申請在先，例如我國專利公告第 423206號之無感測器之三相無刷式DC馬達驅動電路、專利公告第4 2 3 2 0 5號之無感測器馬達驅動器以及專利公告第 4 6 6 8 2 2號之無感測器之三相無刷直流馬達的整流電路等專Since the development of the brushless direct> 'II »motor application industry has received considerable attention, many related technologies have been applied in advance, such as the three-phase brushless DC motor driver without sensor in China Patent Publication No. 423206. Circuits, sensorless motor drivers of Patent Bulletin No. 4 2 3 2 0 5 and rectifier circuits of three-phase brushless DC motors without sensor No. 4 6 6 8 2 2

591884591884

五、發明說明（2) 利前案；其中僅有公告第46 6822號之專利前案係提出有關無感測換相控制技術，但其方式必須取得馬達的=相定子線圈電壓及中性點電壓，就一般馬達結構設計而言，^達的中性點電壓並非馬達本體標準的輸入輸出介面=故:訊，並不容易直接取得，通常都得經過訊號處理的過程及估异的間接方式來達成，因此若要採用該專利前案來設計無刷直流馬達控制系統，必要的前提條件是中性點電壓已^ 可以取得，適用範圍當狹窄。、〜=此，本發明係在結合無感測控制與類比積體電路技V. Explanation of the invention (2) The former case; only the pre-patent case No. 46 6822 proposes the non-sense commutation control technology, but the method must obtain the motor's = phase stator coil voltage and neutral point Voltage, as far as the general design of the motor structure is concerned, the neutral point voltage of the motor is not the standard input / output interface of the motor itself. Therefore, it is not easy to obtain the signal directly. Usually it has to go through the signal processing process and the indirect way of estimation. To achieve this, if you want to use the previous patent to design a brushless DC motor control system, the necessary prerequisite is that the neutral point voltage is available and the scope of application should be narrow. , ~ = This, the present invention is a combination of non-sensing control and analog integrated circuit technology

術’提出一種無感測無刷直流馬達的換相偵測裝置及其方法、，將反抗電動勢估測法具體實現而廣泛應用在無刷直流馬達控制系統中，以有效解決存在於先前技術中之缺失者0 【發明内容】二本t明之主要目的係在提供一種無感測無刷直流馬的赞ΐ偵測裝置及其方法，其係偵測未激發相反抗電動赴^交越點，產生零交越訊號，得到馬達真正的換相時Proposed a commutation detection device and method for a brushless DC motor without sensing, and implemented the anti-EMF estimation method and widely applied it in a brushless DC motor control system to effectively solve the problems existing in the prior art. Missing person 0 [Summary of the invention] The main purpose of the two books is to provide a non-sensing brushless DC horse detection device and a method thereof, which detect the non-excitation and anti-electric motor to the crossing point. Generate a zero-crossing signal to get the real commutation of the motor

相ί决無感測換相控制之問題，且估算出來的未激 ^ t ^動勢不僅可產生換相控制訊號，亦可使用在刷直流馬達之轉速估測。本發"明之另一曰 y 的拖知伯、a丨# 一目的係在提供一種無感測無刷直流馬的換相偵測裝置及i ^ w ^ 夂八方法，其係可直接回授馬達端三相丁 4 Μ汛號，經類卜貝戒唬處理，以得到數位化的零交趣There is absolutely no problem with sensing commutation control, and the estimated unexcited ^ t ^ momentum can not only generate commutation control signals, but also be used to estimate the speed of the brushed DC motor. The purpose of the present invention is to provide a commutation detection device and i ^ w ^ 夂 eight methods for detecting brushless DC horses, which can be directly returned. Give the motor end three-phase D 4 汛 flood number, after the quasi-bubble abstinence treatment, to get a digital zero-fun

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號，無須使用類比/數位轉換器。本發明之再一目的係在提供一種簡單、有效、積體化的無感測無刷直流馬達的換相偵測裝置及其方法，以獲得無刷直流馬達的換相訊號。本舍明之又一目的係在提供一種無感測無刷直流馬達的換相偵測裝置及其方法，其係毋需如第4 6 6 8 2 2號之專利前^需要中性點電壓的直接輸入，即可透過三相定子電壓估异馬達的換相時間，故本發明具有較廣之適用範圍。本發⑥明之又一目的係在提供一種無感測無刷直流馬達的換相偵測裝置及其方法，其係採用餘值放大器的設計，以同日卞元成訊號相加減及倍數的工作，可有效地降低晶片面積。本發明之一實施態樣係為一種無感測無刷直流馬達的換相摘測裝置，此換相偵測裝置係包括一多工器，選擇一無刷直流馬達定子線圈中之未激發相定子訊號；再利用一 ^值放大器放大、縮小並計算該三相定子訊號，再與未激發相定子訊號相減，以得到一未激發相的反抗電動勢；以 ^ 一零交越偵測器，用以偵測該未激發相反抗電動勢之零，越點，並輸出一零交越訊號，根據此零交越訊號即可^ 得一換相訊號。又本發明之另一實施態樣係為一種無感測無刷直流馬達的換相偵測方法，其係先選擇一馬達定子線圈之三^丄子未激發相定子訊號；再利用此三相定子；號：未激餐相疋子訊號經過類比式計算，以得到一未激發相反抗No need to use analog / digital converter. Another object of the present invention is to provide a simple, effective and integrated commutation detection device and method for a brushless DC motor without sensing, to obtain commutation signals of the brushless DC motor. Another object of the present invention is to provide a commutation detection device and method for a non-sense brushless DC motor, which does not require a neutral point voltage as described in Patent No. 4 6 6 8 2 2 Direct input can estimate the commutation time of different motors through the three-phase stator voltage, so the present invention has a wider scope of application. Another purpose of the present invention is to provide a commutation detection device and method for a non-sense brushless DC motor, which adopts the design of a residual value amplifier, and works by adding, subtracting and multiplying signals by the same amount of signals. To reduce the wafer area. One embodiment of the present invention is a commutation and extraction device for a non-sense brushless DC motor. The commutation detection device includes a multiplexer and selects an unexcited phase in a stator coil of a brushless DC motor. Stator signal; a three-value amplifier is used to amplify, reduce, and calculate the three-phase stator signal, and then subtract it from the non-excited phase stator signal to obtain an unexcited phase counter-electromotive force; with a zero-crossing detector, It is used to detect the zero, cross-point of the unexcited anti-EMF, and output a zero crossing signal. According to the zero crossing signal, a commutation signal can be obtained. Yet another embodiment of the present invention is a method for detecting a commutation of a brushless DC motor without sensing, which firstly selects a motor stator coil, three of which are not excited phase stator signals, and then uses the three-phase Stator; No .: The unstimulated meal phase signal is calculated by analogy to get an unexcited opposite reaction

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五、發明說明（4) 電動勢；並偵測未激發相反抗電動勢之零交越點，進而產生一零交越訊號；最後將此零交越訊號延遲3 〇度之相位，即可得到一換相訊號。 ’ 底下It由具體實施例配合所附的圖式詳加說明，合更容易瞭解本發明之目的、技術内容、特點及其所達成I功效0 四、【實施方式】由於馬達控制晶片與伺服器控制軟體為馬達控制系統未來的發展趨勢，而本發明係在設計一種簡單、有效、積體化的換相偵測裝置與方法，以獲得無刷直流馬達的換相訊號。、第一圖為本發明之換相偵測裝置的方塊圖，如圖所不’首先，換相偵測裝置1 〇的類比輸入訊號VA、νΒ與Vc必須，經過外部的低通濾波器（LPF ) 2 2，將一無刷直流^達定子線圈之三相定子訊號的脈寬調變（PWM )訊號濾除，以消除脈寬調變訊號對於定子訊號的影響並降低相角誤差；經過低通濾波器2 2的三相定子訊號Va、Vb與Vc進入此換相偵測裝置10之一多工器12，多工器12選擇三相定子訊號中的其中一相之未激發相定子訊號)。一餘值放大器（Residue Amplifier ) 14係由一中性電壓模擬器（Nutral Voltage Simulator) 142 及一運算器1_44所組成，中性電壓模擬器142平均計算該低通濾波後之二相定子訊號，運算器1 4 4將該輸出計算結果V. Explanation of the invention (4) Electromotive force; and detecting the zero crossing point of the opposite anti-emf which is not excited, and then generating a zero crossing signal; finally, delaying this zero crossing signal by a phase of 30 degrees, a change can be obtained. Relative signal. '' Below it is explained in detail by the specific embodiment and the accompanying drawings, so that it is easier to understand the purpose, technical content, characteristics and achieved effect of the present invention. I. [Embodiment] Because the motor control chip and the server The control software is the future development trend of the motor control system, and the present invention is to design a simple, effective and integrated commutation detection device and method to obtain the commutation signal of the brushless DC motor. The first figure is a block diagram of the commutation detection device of the present invention. As shown in the figure, first, the analog input signals VA, νΒ and Vc of the commutation detection device 10 must pass through an external low-pass filter ( LPF) 22, filtering the pulse width modulation (PWM) signal of a three-phase stator signal of a brushless DC voltage reaching the stator coil to eliminate the influence of the pulse width modulation signal on the stator signal and reduce the phase angle error; The three-phase stator signals Va, Vb, and Vc of the low-pass filter 2 2 enter one of the multiplexers 12 of this commutation detection device 10. The multiplexer 12 selects one of the three-phase stator signals of the unexcited phase stator. Signal). A residual amplifier (Residue Amplifier) 14 is composed of a Neutral Voltage Simulator 142 and an operator 1_44. The neutral voltage simulator 142 calculates the two-phase stator signals after the low-pass filtering on average. Operator 1 4 4 calculates the output result

第7頁乃1884 五、發明說明（5) (V c\3)再與多工恭12輸出的未激發相定子訊號勢X。相減，相減完後的結果便是未激發相的反抗電動 16，复有一零交越偵測器（Zero-crossing detect〇r) 一零二係偵測該未激發相反抗電動勢之零交越點，並輸出到無2越訊號，此零交越訊號只要延遲30度的相位即可得直i馬直流馬達的換相訊號，以根據此換相訊號控制無刷產2換達換相。其中，該未激發相反抗電動勢除了可用來、相訊號之外，亦可動態估測該馬達的轉速。成，^ :二上述之餘值放大器1 4係由切換式電容電路所組放大與^時進行四個輸入訊號的類比運算’包含加、減、俾I =縮小等運算，且餘值放大器14之訊號放大與縮小的二圖^ ^明之換相偵測裝置1 〇的實現方塊圖請同時參閱第哭二1不’零交越偵測器16主要係由一比較器162及拴鎖态1 6 4所έ日士 # , 只雄如、/ 成，该比較器1 62係使用遲滯型比較器，以避免两於4 W ^又零乂越現象’且遲滯型比較器1 6 2之臨界電壓係透過外部雷如、# ^ 卜4電阻進行設定；圖中之時脈產生器（c 1 kPage 7 is 1884 V. Description of the invention (5) (V c \ 3) and the unexcited phase stator signal potential X output by the multiplexer 12. Subtraction. After the subtraction, the result is the anti-electromotive force of the unexcited phase. A zero-crossing detector (Zero-crossing detect〇r) is detected by the zero-two series. The crossover point is output to the No. 2 crossover signal. This zero crossover signal can be delayed by 30 degrees to obtain the phase commutation signal of the DC motor. The brushless production can be controlled based on this phase commutation signal. phase. Among them, in addition to the unexcited reverse EMF, it can be used to estimate the speed of the motor in addition to the phase signal. Cheng, ^: Two of the above-mentioned residual value amplifiers 1 and 4 are analogous operations of four input signals when amplified by a switched capacitor circuit and ^, including addition, subtraction, and 俾 I = reduction, and the residual value amplifier 14 The two diagrams of the signal zooming in and out ^ ^ The implementation block diagram of the commutation detection device 1 〇 Please refer to the first two. The zero crossing detector 16 is mainly composed of a comparator 162 and a latched state 1 6 4 所 έ 日士 #, Only as strong as, /, the comparator 1 62 series uses a hysteresis type comparator to avoid two or more 4 W ^ and zero crossing phenomenon 'and the threshold voltage of the hysteresis type comparator 1 6 2 It is set through external Lei Ru, # ^ 4 resistor; the clock generator (c 1 k

Generator ) ^ ^ ^ 士〆 y10貝貝產生三組不同相位且各組互不重疊的 ^ k七、給餘值放大器1 4與比較器1 62使用，其時脈頻率為5 MH7 · μ广 _ ’一偏壓電路（biasing circuit)20 需提供穩疋的電厚作i … 卜马類比電路的偏壓電源；餘值放大器1 4係二成中性電壓模擬器的三等分平均及相減的運算；比較器Generator) ^ ^ ^ Shibei y10 Beibei generates three sets of different phases and each set does not overlap with each other ^ k Seven, for the residual amplifier 1 4 and comparator 1 62, the clock frequency is 5 MH7 · μ 广 _ 'A biasing circuit 20 needs to provide a stable electrical thickness for the bias power of the analog circuit of the Burma; the residual value amplifier 1 4 series into the neutral voltage simulator of the three-division averaging and phase Subtraction operation

At /、板鎖^器1 64兩個元件則實現訊號零交越點偵測的功 w ’在求彳于零父越點之後，即可獲致相位超前換相訊號3 0At /, board lock device 1 64 two components realize the function of signal zero crossing point detection w ′ After finding the zero parent crossing point, the phase advance commutation signal can be obtained 3 0

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度的零交越訊號，進而得知該換相訊號。 2電動勢的端電壓量測法為最常見的無刷直流馬達二凋、相控制技術，其優點為硬體電路簡單且回授訊號 :易取得，而本發明所提出的換相偵測裝置與方法便是根 :?鈿電壓里測法，才米用混合訊號積體電路的技術，結 s無感測控制與類比積體電路技術，以效、積體化的換相偵測穿詈U ^ k 二仰1貝列衣置，以獲得無刷直流馬達的換相矾號。本發明係偵測未激發相反抗電動勢的零交越點，產生 f交越訊號，得到無刷直流馬達真正的換相時間點，以解 :無感測換相控制之問冑’且估算出來的未激發相之反抗、動勢不僅可產生換相控制訊號；無須如第466822號之專利前案需要中性點電壓的直接輸入，本發明即可直接透過二相定子電壓估算馬達的換相時間，故本發明且有較廣之適用範圍。〃、另一方面，本發明係可直接回授馬達端三相定子電壓訊號，經類比訊號處理，以得到數位化的零交號，盔須使用類比/數位轉換器。且本發明之換相偵測裝置係採、用餘值放大器的設計，以同時完成訊號相加減及倍數的工作，使其可有效地降低晶片面積。以上所述之實施例僅係為說明本發明之技術思想及特點、，其目的在使熟習此項技藝之人士能夠瞭解本發明之内谷並據以貫施，當不能以之限定本發明之專利範圍，即大凡依本發明所揭示之精神所作之均等變化或修飾，仍應涵 591884 五、發明說明（7) 蓋在本發明之專利範圍内。圖號說明： 10 換相偵測裝置 14 餘值放大器 144 運算器 1 6 2 比較器 18 時脈產生器 2 2 低通濾波器 12 多工器 142中性電壓模擬器 16 零交越偵測器 1 6 4栓鎖器 20 偏壓電路Degrees of zero-crossing signals, and thus the commutation signals. 2 The terminal voltage measurement method of the electromotive force is the most common brushless DC motor secondary phase and phase control technology, which has the advantages of simple hardware circuit and feedback signal: easy to obtain, and the commutation detection device and The method is the root: the method of voltage in-situ measurement, which uses the technology of mixed signal integrated circuit, which combines non-sense control and analog integrated circuit technology to detect the current through effective and integrated commutation. ^ k Eryang 1 Belle clothes to obtain commutating alum number of brushless DC motor. The invention detects the zero crossover point of the opposite anti-emf which is not excited, generates the f crossover signal, and obtains the real commutation time point of the brushless DC motor, so as to solve the problem of non-sensing commutation control and estimate it. The resistance and momentum of the unexcited phase can not only generate the commutation control signal; the direct input of the neutral point voltage is not required as in the pre-patent No. 466822, and the invention can estimate the commutation of the motor directly through the two-phase stator voltage. Time, so the present invention has a wider scope of application.另一方面 On the other hand, the present invention can directly feedback the three-phase stator voltage signal at the motor end and process it by analog signal to obtain the digitized zero-crossing sign. The helmet must use an analog / digital converter. In addition, the commutation detection device of the present invention adopts the design of a residual value amplifier to complete the operations of signal addition, subtraction and multiples at the same time, so that it can effectively reduce the chip area. The above-mentioned embodiments are only for explaining the technical ideas and characteristics of the present invention, and the purpose is to enable those skilled in the art to understand and implement the inner valley of the present invention. The scope of patents, that is, all equal changes or modifications made in accordance with the spirit disclosed in the present invention, shall still cover 591884. V. Description of the invention (7) is covered by the patent scope of the present invention. Description of figure number: 10 Commutation detection device 14 Residual amplifier 144 Operator 1 6 2 Comparator 18 Clock generator 2 2 Low-pass filter 12 Multiplexer 142 Neutral voltage simulator 16 Zero-crossing detector 1 6 4 latch 20 bias circuit

第10頁 591884 圖式簡單說明第一圖為本發明之換相偵測裝置的方塊圖。第二圖為本發明之換相偵測裝置的實現方塊圖。Page 10 591884 Brief description of the diagram The first diagram is a block diagram of a commutation detection device of the present invention. The second figure is an implementation block diagram of the commutation detection device of the present invention.

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Claims

591884 六、申請專利範圍 1、一種無感測無刷直流馬達的換相偵剛裝置，其係接收一無刷直流馬達定子線圈之三相定子訊號'以偵測'該馬達，的換相訊號，該換相偵測裝置包括：一多工器，選擇該定子線圈中之未激發相定子訊號；一餘值放大器，其係放大、縮小並計算該三相定子訊號’再與該未激發相定子訊號相減，以產生一未激發相的反抗電動勢；及一零交越偵測器，其係偵測該未激發相反抗電動勢之零交越點，並輸出一零交越訊號。591884 VI. Scope of patent application 1. A commutation detection device for a brushless DC motor, which receives the three-phase stator signal of a brushless DC motor stator coil to detect the commutation signal of the motor. The commutation detection device includes: a multiplexer that selects an unexcited phase stator signal in the stator coil; a residual value amplifier that amplifies, reduces, and calculates the three-phase stator signal, and then the unexcited phase The stator signals are subtracted to generate a counter-electromotive force of an unexcited phase; and a zero-crossing detector that detects the zero-crossing point of the un-excited opposing anti-emf and outputs a zero-crossing signal.

2、如申請專利範圍第1項所述之無感測無刷直流馬達的換相偵測裝置，其中該零交越訊號延遲30度的相位即為該無席J直流馬達的換相訊號。 3、如申請專利範圍第1項所述之無感測無刷直流馬達的換相偵測裝置，其中該未激發相反抗電動勢係玎用來產生換相訊號’並可動態估測該馬達的轉速。 4、如申請專利範圍第1項所述之無感測無刷直流馬達的換 ^偵測裝置，其中該三相定子訊號更經過外部之低通濾波為’以濾除其脈寬調變訊號或其他雜訊。2. The commutation detection device of the sensorless brushless DC motor as described in item 1 of the scope of the patent application, wherein the phase of the zero-crossing signal delayed by 30 degrees is the commutation signal of the silent J DC motor. 3. The commutation detection device of the non-sense brushless DC motor as described in item 1 of the scope of the patent application, wherein the unexcited opposite anti-electromotive force system is used to generate a commutation signal, and the dynamics of the motor can be estimated. Rotating speed. 4. The replacement device of the sensorless brushless DC motor as described in item 1 of the scope of the patent application, wherein the three-phase stator signal is further filtered by an external low-pass filter to filter out its pulse width modulation signal. Or other noise.

〕、如申請專利範圍第1項所述之無感測無刷直流馬達的換相谓測裝置，其中該餘值放大器係由切換式電容電路所組成’以同時進行四個輸入訊號的類比運算，包含加、減、 $大與縮小等運算，且該餘值放大器之訊號放大與縮小的 °數係透過該内部電容比值的設定。如申請專利範圍第1項所述之無感測無刷直流馬達的換], The commutation measuring device of the non-sensing brushless DC motor as described in item 1 of the scope of patent application, wherein the residual value amplifier is composed of a switched capacitor circuit to perform analog operation of four input signals at the same time , Including addition, subtraction, $ large and reduction operations, and the number of degrees of signal amplification and reduction of the residual value amplifier is set by the internal capacitance ratio. Replacement of the sensorless brushless DC motor as described in item 1 of the patent application

591884 六、申請專利範圍偵測哀置，其中該餘值放大器係由_中性電壓模擬琴及一運算器所組成。 ° 7如申請專利範圍第1項所述之無感測無刷直流馬達的換 :偵測裝置，丨中該零交越偵測器主要係由比較器及栓鎖為所組成。 8、如申請專利範圍第7項所述之無感㈣無刷i流馬達的換相偵測裝置，丨中該比較器係為遲滯型比較器，以避免雜汛造成的假零交越現象。 ” 9、如申請專利範圍第8項所述之無感測無刷直流馬達的換相偵測裝置，#中該遲滯型比較器之臨界電壓、電阻進行設定。 ^ I Η ίο、如申請專利範圍第i項所述之無感測無刷直流馬達的換相"f貞測裝置’更有一日卑Μ產峰哭在；i止守胍座生崙係產生不同相位的時舱訊號給該餘值放大器與該零交越偵測器使用。才胍 11 ' = 項所述之無感測無刷直流馬達的換” 置，更有-偏壓電路提供穩定的電的偏壓電源。 ~电塔 12、一種無感測無刷直流馬達的換相偵測方法，其係偵測一無刷直流馬達的換；I；曰邙躲 # ϋ i上， λ 1貝 ]換相成旎，该換相偵測方法係包括下列步驟： τ匕估選擇該馬達定子線圈，二& ^ 7 f 围之二相疋子訊號中的未激發相定子訊號；丁利用該三相定子訊號盥兮 ^ ^"興違未激發相定子訊號經類比式外算，以知到一未激發相反抗電動勢；飞冲591884 6. Scope of patent application Detecting the sorrow, wherein the residual value amplifier is composed of _ neutral voltage analog piano and an arithmetic unit. ° 7 The sensorless brushless DC motor replacement: detection device as described in item 1 of the scope of the patent application, the zero-crossing detector is mainly composed of a comparator and a latch. 8. The commutation detection device of the non-inductive and brushless i-flow motor as described in item 7 of the scope of patent application. The comparator is a hysteresis comparator to avoid false zero crossing caused by miscellaneous floods. . ”9. As described in the commutation detection device of the non-sensing brushless DC motor described in item 8 of the scope of patent application, the threshold voltage and resistance of the hysteresis comparator in # are set. ^ I Η ίο, such as applying for a patent The commutation of the sensorless brushless DC motor described in the item i of the range " f-testing device " will be crying more and more in one day; i. The residual value amplifier is used with the zero-crossing detector. Only the switching of the sensorless brushless DC motor described in item 11 '= is described, and a bias circuit provides a stable electrical bias power supply. . ~ Electric tower 12, a commutation detection method of a brushless DC motor, which detects the commutation of a brushless DC motor; I; 邙邙 # # i, λ 1]] commutation into 旎The commutation detection method includes the following steps: τ 估 Select the motor stator coil, two & ^ 7 f surrounding unexcited phase stator signal in the two-phase sub-signal; D using the three-phase stator signal. Xi ^ ^ " The unstimulated phase stator signal is calculated by analogy to know that an unexcited counter-electromotive force is detected;

第13頁 591884 六、申請專利範圍偵測該未激發相反抗電動勢之零交越點，以產生一零交越訊號；及將該零交越訊號延遲3 0度之相位，以得到一換相訊號。 1 3、如申請專利範圍第1 2項所述之無感測無刷直流馬達的換相偵測方法，其係採用馬達端電壓量測的反抗電動勢估測法。 14、換相換相 15 ^ 換相以濾 16 > 換相中，该未 17、換相選擇如申請專利偵測方法，訊號，並可如申請專利偵測方法，除其脈寬調如申請專利偵測方法，係利用該未激發相反抗如申請專利摘測方法，该三相定子範圍第1 2 其中該未動態估測範圍第1 2 其中該三變訊號或範圍第1 2 其中在計激發相定電動勢。範圍第1 2 其中該未訊號的其項所述激發相該馬達項所述相定子其他雜項所述算該未子訊號項所述激發相之無感測無刷直流馬達反抗電動勢係可用來產的轉速。之無感測無刷直流馬達訊號更經過一濾波步驟Page 13 591884 6. The patent application scope detects the zero crossing point of the unexcited anti-EMF to generate a zero crossing signal; and delaying the zero crossing signal by a phase of 30 degrees to obtain a commutation Signal. 1 3. The commutation detection method of the non-sensing brushless DC motor as described in item 12 of the scope of patent application, which is an anti-EMF estimation method using motor terminal voltage measurement. 14. Commutation Commutation 15 ^ Commutation to filter 16 > During commutation, the selection of the commutation is as described in patent detection method and signal, and can be used for patent detection method except for its pulse width modulation such as The patent application detection method is to use the non-excitation counteracting method, such as the patent application extraction test method. The three-phase stator range is No. 12 in which the non-dynamic estimation range is No. 1 in which the three-variable signal or range is No. 12 in which The meter excites the phased emf. Scope No. 1 2 Among the non-signaled items, the excited phase, the motor item, the phase stator, and other miscellaneous items, the non-sensorless brushless DC motor that calculates the excited phase described in the non-signal item can be used to produce electromotive force. Speed. The sensorless brushless DC motor signal goes through a filtering step

中相訊。之無感測無刷直激發相反抗電動及另二相定子訊之無感測無刷直定子訊號係由一定子訊號。流馬達的勢之步驟號計算出流馬達的多工器來In the news. The sensorless brushless straight excitation of the opposite anti-electromotive and the other two phase stator signals. The sensorless brushless straight stator signal is a stator signal. The potential step number of the flow motor is calculated by the multiplexer of the flow motor.