200903980 九、發明說明： 【發明所屬之技術領域】 r 本發明係關於一種壓縮機之無感測迴授電路，特別 是關於利用一分段檢測單元進行一壓縮機之反電勢之檢測 ’以便分段並縮小該反電勢檢測範圍之壓縮機之無感測迪 授電路。 【先前技術】 在壓縮機驅動的發展技術中，由於該壓縮機長時操 作於尚溫且劇烈振動的劣勢環境，導致該壓縮機無法使用 位置感測器〔例如光學編碼器或霍爾感測器〕進行驅動， 也因此為了提昇該壓縮機控制的穩定性，該壓縮機結合無 感測技術以進行運轉，儼然已成為目前壓縮機驅動技術中 重要的關鍵技術。 習用壓縮機之無感測迴授電路，請參照第丨圖所示 ’其包含—壓縮機90、至少一檢測電路91、—微處理機 92及一驅動電路93。該壓縮機90之各電力線L連接各 該檢測電路91〔在第i圖中’其特別揭示若該壓縮機9〇 係為一三相壓縮機，則設置三個檢測電路91〕，當該壓 縮機90運轉時，由於該檢測電路％具有二電阻 ，該二電阻以，可選擇不同的比例，因此該檢測電路 91可經由该電力線L將該壓縮機9Q之—反電勢進行分壓 ，以便將該壓誠之反電勢之較電壓值降壓為―適人該 微處理機92額定輸入的電壓值，例如將該壓縮機9〇 = 電勢之額定電壓值3GG伏特〔v〕降成w，以便輪入該 PK10384 07/07/02 200903980 微處理機92，該微處理機92 予該驅動電路93，進而g制—換向控制信號 一 Λ _ 疋叫徑制5亥壓縮機90運轉。 由士於兮〇上述習用具有下列缺點，例如：當運轉 中，由於該反電勢之女丨你厳 連轉 田^对 大小與壓縮機9〇之轉速變化呈正比 該_機9G運轉於低迷時，該 :電=產生出的電壓將遠小於5一心 热法正麵判_檢啦路91哺換出的電壓值 而…、法產生正確的換向控制信號。舉 =之轉速操作在〔啊〕時， 感應^的反電勢介於15V至3_之間。若該檢測電路91 =一电阻Ra、Rb之比值設計成6〇時，則可將對應於 南轉速的反電勢值300V降成5V的電壓值，並送至該 處理機92。然而，由於該檢測電路91之二電阻Ra、Rb 遲之^壓比值係用以轉換該壓縮機9〇之全部轉速範圍，因 此右3亥壓、％機9〇操作在6〇〇rpm以下時，該檢測電路91 ，轉換出低於1V之電壓’但該轉換後之電塵值係與—般 瘫況所產生的電壓值相當，因此容易造成該轉換後的電壓 值因受干擾而失真，進而導致該微處理機92發生誤判二 1"月况基於上述原因，有必要進一步改良上述習用壓縮機 之無感測迴授電路。 ' 有鑑於此，本發明改良上述之缺點，其係在一壓縮 機之各電力線連接一分段檢測單元，該分段檢測單元具有 數個分壓電路’各該分壓電路設計成具有一分壓比值，且 數個分塵電路的分慶比值係呈一等差數列增加。各該分壓 PK10384 07/07/02 200903980 =職ΤΓ—反電勢，並將該反電勢依據不 =分壓比值降成不同的錢輪出電麼，並將適當 輸出電麵擇經由-類比多工器輪入至一微處理機，進: 使該微處理機產生-正私_㈣信號。藉此， 檢測單元可分段並縮小該反電勢的㈣，進 升控制的精確度及增加該_機操作之穩定性。 【發明内容】 本發明之主要目的係提供— 電路，其錄由—分段卜I 種之無感測迴授 ^ 彳]早元將—_機之反電勢降# ==:直流輸出電4，並由-類比多工心 :=二: 至—微處理機，使得本發明具有 七社制精確度及增加該壓縮機操作之穩定性之功效。 i路本次要目的係提供—種壓縮機之無感測迴授 比多工器及—微處理機之間連接-主動 二制ί:: ’使得本發明具有降低高頻雜訊干擾、提升 &制精確度及增加該壓縮機操作之齡性之功效。 根據本發明之壓縮機之無感_ 少一分段檢測單元、5 Φ —相，# ^ 3 ^ 分严於、、ριγ _目士 颂比夕工器及一微處理機。該 個依序呈-等差數= =數個分覆=具有數 ==具有不同位準之直二 以便對應^生二^由該類比多工器輸出至該微處理機， 。、心 、向控制信號，進而可控制該壓縮機運轉 ΡΚ10384 07/07/02 200903980 【實施方式】 Μ,ΐ發明之上述及其他目的、特徵及優點能更明 #易重’下城舉本發日狀較佳實施例， ，作詳細說明如下： 。所附圖式 請荟照第2 ®所*，本發雜佳實施例 無感測迴授電路係包含一壓縮機丨、至少 = 2;至少-類比多工器3、至少一主動式低通濾波器 早： 被處理機5、-驅動電路6。該壓縮機i具有數倏 L，各該分段檢測單元2連接至各該電力線乙，以^哕 分段檢測單元2可藉由該電力線L接收該壓縮機】之: 反電勢，同時將該反電勢降壓轉換成數個直流輪出電壓， 各該分段檢測單元2係依序連接各該類比多工器3及各該 主動式低通濾波器4,以便該直流輸出電壓可經由該類比 _多工器3及該主動式低通濾波器4傳送至該微處理機$ , 以產生一換向控制信號，並送至該驅動電路6，以便控制 該壓縮機1運轉。在此，本發明較佳實施例揭示該壓縮機 1 Ίτ'為^'二相二線式麼細機，因此選擇個別設置三個分段 檢測單元2、三個類比多工器3及三個主動式低通濾波器 4，以便檢測該壓縮機1之三相反電勢。 請參照第2及3圖所示，本發明較佳實施例之壓縮 機之無感測迴授電路之分段檢測單元2具有數個分壓電路 ，例如本發明較佳實施例之第一分壓電路21、第二分壓 電路22、第三分壓電路23及第四分壓電路24。該第一、 第二、第三及第四分壓電路21、22、23、24均包含一基 ΡΚ10384 07/07/02 200903980 本電阻R及一稽納二極體ZD〔Zener Di〇de〕。該第—' ： 第二、第二及第四分壓電路21、22、23、24另分別具 • 一第一倍率電阻R卜一第二倍率電阻R2、一第三倍^ 阻R3及一第四倍率電阻R4。該第一、筮-、笙— 牮一弟二及第四 分壓電路21、22、23、24個別的基本電阻R及稽納二 體ZD係相互並聯。 ^ » 請再參照第2圖所示，本發明較佳實施例之類比多 工器3具有數個輸入端χ〇、χ卜Χ2、χ3、—輪出端二 及一選擇輸入端A、B d在一時間點，該類比多工哭3料 由該選擇輸入端A、B之信號選擇將其中之一輪入端^^ 、XI、X2或X3與該輸出端〇相互導通。 ί 31請再參照第2及3圖所示，該第一分壓電路21之基 本電阻R與第一倍率電阻尺！個別之一端相互串聯，以二 成一第一串聯接點211 ;同理，該第二 '第三及第四分壓 電路22、23、24藉由如上述第一分壓電路21相同的電路 連接組態，以分別形成一第二串聯接點221、一第三串聯 ‘ 接點231及一第四串聯接點241，且該第一、第二、第三 及第四倍率電阻Rl、R2、R3、R4之另一端係共同連接 至同一電力線L，以分別接收該壓縮機1之反電勢，該基 本電阻R之另一端則共同接地。該第一、第二、第三及 ' 第四串聯接點211、221、231 、241個別連接至該類比多 - 工器3之輸入端Χ〇、X卜Χ2、Χ3。 請再參照第2及3圖所示，該第一分壓電路21之基 本電阻R及第一倍率電阻R1因串聯連接，且經由設計使 ΡΚ10384 07/07/02 — 9 — 200903980 其具有特定的一第一分壓比值；同理，該第二、第三及第 四分壓電路22、23 ' 24之第二、第三及第四倍率電阻R2 、R3、R4因與個別的基本電阻R串聯，而可設計成特定 的一第二分壓比值 '一第三分壓比值及一第四分塵比值。 該第一、第二、第三及第四分壓比值均不同，在較佳的設 計中，該第一、第二、第三及第四分壓比值依序呈一等差 數列增加。 在此，請參照表1所示，本發明較佳實施例將列舉 一關於該分段檢測單元2之設計。經由設計，該第一、第 二、第三及第四分壓比值係分別設計為15、30、45及60 。以下將以該第一、第二、第三及第四分壓比值之設計值 進行詳細說明。200903980 IX. Description of the invention: [Technical field to which the invention pertains] r The present invention relates to a non-sensing feedback circuit for a compressor, and more particularly to detecting a back EMF of a compressor using a segmentation detecting unit. Segment and reduce the non-sensing digest circuit of the compressor of the back EMF detection range. [Prior Art] In the development technique of the compressor drive, since the compressor is operated for a long time in a disadvantageous environment of temperature and severe vibration, the compressor cannot use the position sensor (for example, an optical encoder or a Hall sensor). 〕 Drive, and therefore in order to improve the stability of the compressor control, the compressor combined with non-sensing technology to operate, has become an important key technology in the current compressor drive technology. For the non-sensing feedback circuit of the conventional compressor, please refer to the following figure, which includes a compressor 90, at least one detecting circuit 91, a microprocessor 92 and a driving circuit 93. Each of the power lines L of the compressor 90 is connected to each of the detecting circuits 91 (in the figure i, it specifically discloses that if the compressor 9 is a three-phase compressor, three detecting circuits 91 are provided), when the compression is performed When the machine 90 is in operation, since the detecting circuit % has two resistances, the two resistors can be selected in different proportions, so the detecting circuit 91 can divide the back electromotive force of the compressor 9Q via the power line L, so as to The voltage value of the counter-electrical potential of the pressure is reduced to "the voltage value of the rated input of the microprocessor 92, for example, the rated voltage of the compressor 9 〇 = potential is reduced to 3 GG volts [v], so that the wheel The PK10384 07/07/02 200903980 microprocessor 92, the microprocessor 92 is supplied to the drive circuit 93, and further, the commutation control signal Λ _ 疋 径 5 5 compressor 90 operates. The above-mentioned abuses by Shi Yuxi have the following shortcomings, for example: when in operation, because of the back-potential, the woman who turns you into the field is proportional to the change in the speed of the compressor 9 该. , the electricity: the generated voltage will be much less than the value of the voltage value of the positive feedback judged by the one-hearted heat method. When the speed is operated at [ah], the back EMF of the induction ^ is between 15V and 3_. If the ratio of the detection circuit 91 = a resistor Ra, Rb is designed to be 6 ,, the back EMF value 300V corresponding to the south rotation speed can be reduced to a voltage value of 5 V and sent to the processor 92. However, since the two resistors Ra and Rb of the detecting circuit 91 are used to convert the entire speed range of the compressor 9〇, the right 3 hp and the % 9 〇 operation are below 6 rpm. The detection circuit 91 converts a voltage lower than 1V', but the converted electric dust value is equivalent to the voltage value generated by the general condition, so that the converted voltage value is easily distorted due to interference. Further, the microprocessor 92 is misjudged. The monthly condition is based on the above reasons, and it is necessary to further improve the non-sensing feedback circuit of the conventional compressor. In view of the above, the present invention improves the above disadvantages by connecting a power transmission line of a compressor to a segment detecting unit having a plurality of voltage dividing circuits each of which is designed to have A partial pressure ratio, and the division ratios of several dust separation circuits are increased by an arithmetic progression. Each of the partial pressures PK10384 07/07/02 200903980 = job ΤΓ - back EMF, and the back EMF is reduced to a different money wheel based on the non-divided ratio, and the appropriate output is selected by analogy. The tool is wheeled into a microprocessor, and: causes the microprocessor to generate a positive-private _ (four) signal. Thereby, the detecting unit can segment and reduce the (4) of the back electromotive force, improve the accuracy of the control and increase the stability of the operation of the machine. SUMMARY OF THE INVENTION The main object of the present invention is to provide a circuit that records the non-sensing feedback of the type I. The early element will be the back EMF of the machine - #==: DC output 4 And by - analogous work: = two: to - microprocessor, so that the invention has seven system accuracy and increase the stability of the operation of the compressor. The purpose of this road is to provide a non-sensing feedback ratio of the compressor to the multiplexer and the connection between the microprocessors - the active two system ί:: 'The invention has the effect of reducing high frequency noise interference and improving & precision and the effect of increasing the age of the compressor. According to the invention, the non-inductive _ less one segment detecting unit, 5 Φ-phase, #^ 3 ^ is strictly less than, ριγ _ 士士颂 夕 工 及 and a microprocessor. The order is --equal difference = = number of divisions = number of = = = straight two with different levels so that the corresponding multiplexer is output to the microprocessor by the analog multiplexer. , heart, direction control signal, and then control the compressor operation ΡΚ 10384 07/07/02 200903980 [Embodiment] Μ, 上述 the above and other purposes, features and advantages of the invention can be more obvious #易重'下城举发发The preferred embodiment of the day is described in detail as follows: In the drawings, please refer to the second edition*. The non-sensing feedback circuit of the present invention includes a compressor 丨, at least = 2; at least - analog multiplexer 3, at least one active low pass The filter is early: the processor 5, the drive circuit 6. The compressor i has a number L, and each of the segment detecting units 2 is connected to each of the power lines B, so that the segment detecting unit 2 can receive the compressor by the power line L: a back EMF, and The back-potential step-down is converted into a plurality of DC wheel-out voltages, and each of the segment detecting units 2 sequentially connects each of the analog multiplexers 3 and each of the active low-pass filters 4 so that the DC output voltage can pass the analogy The multiplexer 3 and the active low pass filter 4 are transferred to the microprocessor $ to generate a commutation control signal and sent to the drive circuit 6 to control the operation of the compressor 1. Here, the preferred embodiment of the present invention discloses that the compressor 1 Ίτ′ is a two-phase two-wire type fine machine, so that three segment detection units 2, three analog multiplexers 3 and three are separately selected. An active low pass filter 4 is used to detect the opposite potential of the compressor 1. Referring to Figures 2 and 3, the segment detecting unit 2 of the non-sensing feedback circuit of the compressor of the preferred embodiment of the present invention has a plurality of voltage dividing circuits, such as the first embodiment of the preferred embodiment of the present invention. The voltage dividing circuit 21, the second voltage dividing circuit 22, the third voltage dividing circuit 23, and the fourth voltage dividing circuit 24. The first, second, third and fourth voltage dividing circuits 21, 22, 23, 24 each comprise a base 10384 07/07/02 200903980, the resistor R and a quencher diode ZD [Zener Di〇de ]. The first -' : second, second and fourth voltage dividing circuits 21, 22, 23, 24 respectively have a first rate resistor R, a second rate resistor R2, a third time resistor R3 and A fourth rate resistor R4. The first basic resistance R and the second binary ZD of the first, 筮-, 笙-牮, and the fourth voltage dividing circuits 21, 22, 23, and 24 are connected in parallel with each other. ^ Referring again to FIG. 2, the analog multiplexer 3 of the preferred embodiment of the present invention has a plurality of input ports χ, χ Χ 2, χ 3, - wheel terminal 2 and a selection input terminal A, B. d At a point in time, the analog multiplexed crying material selects one of the rounding terminals ^^, XI, X2 or X3 to be electrically connected to the output terminal 由 by the signal of the selecting input terminals A and B. ί 31 Please refer to the second resistor 3 and the first resistor of the first voltage divider circuit 21 as shown in Figures 2 and 3! One of the individual ends is connected in series with each other to form a first series connection point 211. Similarly, the second 'third and fourth voltage dividing circuits 22, 23, 24 are identical by the first voltage dividing circuit 21 as described above. The circuit is connected to form a second series connection 221, a third series 'contact 231 and a fourth series contact 241, and the first, second, third and fourth rate resistors R1, The other ends of R2, R3, and R4 are commonly connected to the same power line L to respectively receive the back electromotive force of the compressor 1, and the other end of the basic resistor R is commonly grounded. The first, second, third and 'fourth series contacts 211, 221, 231, 241 are individually connected to the input terminals X, X Χ 2, Χ 3 of the analog multi-tool 3. Referring to FIGS. 2 and 3 again, the basic resistance R of the first voltage dividing circuit 21 and the first rate resistor R1 are connected in series, and are designed to be ΡΚ10384 07/07/02 — 9 — 200903980 a first voltage dividing ratio; similarly, the second, third, and fourth voltage dividing circuits 22, 23' 24 of the second, third, and fourth rate resistors R2, R3, and R4 are related to individual basic The resistors R are connected in series, and can be designed to have a specific second partial pressure ratio 'a third partial pressure ratio value and a fourth divided dust ratio value. The first, second, third and fourth partial pressure ratio values are different. In a preferred design, the first, second, third and fourth partial pressure ratio values are sequentially increased by an arithmetic progression. Here, referring to Table 1, a preferred embodiment of the present invention will cite a design regarding the segment detecting unit 2. By design, the first, second, third, and fourth partial pressure ratios are designed to be 15, 30, 45, and 60, respectively. The design values of the first, second, third, and fourth partial pressure ratio values will be described in detail below.
表I分段檢谢早元之設計。Table I is a sub-confirmation of the design of the early element.
第一分壓 電路 第二分壓 電路 第三分壓 電路 第四分壓 電路 操作區段 0 〜75V 76〜150V 151〜225V 226-300V 基本電阻R lkQ lkQ lkQ lkQ 第一倍率電阻R1 15 kQ 無 益 第二倍率電阻R2 無 30 kQ 無 M. 第三倍率電阻R3 益 益 4 * *·» 45 kQ 益 第四倍率電阻R4 無 备 1 »*> 60 kQ 因此，請再參照第2圖、第3圖及表1所示，若該 PK10384 07/07/02 10 200903980 壓縮機！操作在高轉連 300V之反電勢，誃 假°又此時该壓縮機丨 串聯接點241建：:分壓電路21將透過分壓在兮J 納二極體②選擇一::的直流幽壓;同時，若 、第二及第《分壓電==?壓規格時；= 、-建、第二及第三 僅能在1間二，_電壓。由於該類 211、胃點輸出該第_、第二 工器3 必須由該微處理機5進其/之一直流輪出電壓，因此 換言之，、處理機5 ^^擇較為適當的直流輪出電壓， 其連接，比多3有—組信號輸出端〔未纷示， 理機5具有 盗3之選擇輸入端A、η 」 :丨哭^號輪入端〔去洛千1甘 且該微處 -^3之輪一。， 未、.，a不〕，其連接該類 該選擇輪、A、B ^^微處理機5送出 入端X0、χ 乂將該類比多工器3之化予 Λ1、Χ2或α<其中之一蚣 設信號為％ 3與該輸出端〇導通，例如輸 υ時，即將一 λ , 1 j如當該預 將該第—輸出端〇導通，此時 滤波器4輪4至今㈣直流輸出電壓透過該主動式低通 接箸，靖:里機5之信號輸入端。 該微處理機S :擇:：圖、第3圖及表1所示，由於 區段〔即0〜7 造^機1之反電勢規劃成四個操作 四個操作區& )υν、151〜225及226〜300V〕，該 21至24之^之电廢範圍對應於該第—至第四分壓電路 至第四分壞比值，以轉換出適當的直流輸 ΡΚ10384 07/07/02 200903980 出電壓，判斷該適當的直流輸出電壓之依據為：由於該第 一串聯接點211之直流輸出電壓係為一週期性的脈波「即 具有一頻率〕，當該壓縮機1之轉速操作在300V時，其 具有一特定的頻率’因此該微處理機5可將該特定的頻率 與該規劃的四個操作區段所轉換成的對應頻率進行比對， 以便判斷出目前之操作轉速所對應產生的反電勢適合由該 第四分壓電路24進行降壓’並輪入至該微處理機$，藉 此該微處理機5會產生該預設信號〇3，並送至該類比多 工器3之選擇輸入端A、B，以便該類比多工器3之輸入 端X3與輸出端〇導通’並將該第四串聯接點241之直流 輸出電壓輸出至該微處理機5，進而使該微處理機5產生First voltage dividing circuit second voltage dividing circuit third voltage dividing circuit fourth voltage dividing circuit operating section 0 to 75V 76~150V 151~225V 226-300V basic resistance R lkQ lkQ lkQ lkQ first rate resistance R1 15 kQ Unprofitable second rate resistor R2 No 30 kQ No M. Third rate resistor R3 Benefit 4 * *·» 45 kQ Benefit fourth rate resistor R4 No 1 »*> 60 kQ Therefore, please refer to 2, 3 and Table 1, if the PK10384 07/07/02 10 200903980 compressor! Operation in the high-conversion 300V back EMF, 誃 ° ° ° at this time the compressor 丨 series connection 241 built:: The voltage divider circuit 21 will be divided by the 兮 J nano diode 2 select a :: DC At the same time, if, the second and the second "partial piezoelectric ==? pressure specification; =, - build, second and third can only be in one, two, _ voltage. Since the type 211 and the stomach point output the _th and the second unit 3 must enter the DC voltage by the microprocessor 5, in other words, the processor 5 selects a suitable DC rotation. The voltage, its connection, has more than 3 sets of signal output terminals (not shown, the machine 5 has the selection input A, η of the thief 3): 丨哭^号轮入端 [去洛千千甘和微At the end of the ^^3 round. , not, ., a not], which connects the selection wheel, A, B ^ ^ microprocessor 5 sends the input end X0, 乂 乂 the analog multiplexer 3 to Λ 1, Χ 2 or α < One of the sets of signals is %3 and the output terminal is turned on. For example, when the input is turned on, a λ, 1 j is turned on, for example, when the first output terminal is turned on, and the filter 4 wheel 4 is now (four) DC output. The voltage is transmitted through the active low-pass connection, and the signal input terminal of the Jing 5 machine. The microprocessor S: select::, Fig. 3 and Table 1, because the section [that is, the back EMF of 0~7 machine 1 is planned to be four operations four operating areas & υ 、, 151 ~225 and 226~300V], the electrical waste range of 21 to 24 corresponds to the first to fourth voltage dividing circuit to the fourth dividing ratio to convert the appropriate DC input 10384 07/07/02 200903980, the voltage is output, and the appropriate DC output voltage is judged as follows: since the DC output voltage of the first series contact 211 is a periodic pulse wave, that is, has a frequency, when the speed of the compressor 1 is operated At 300V, it has a specific frequency' so the microprocessor 5 can compare the specific frequency with the corresponding frequency converted by the four operating sections of the plan to determine the current operating speed. Correspondingly generated back EMF is suitable for stepping down by the fourth voltage dividing circuit 24 and is rotated into the microprocessor $, whereby the microprocessor 5 generates the preset signal 〇3 and sends it to the analogy The input ends A and B of the multiplexer 3 are selected so that the input terminal X3 and the output of the analog multiplexer 3 The terminal turns on and outputs the DC output voltage of the fourth series contact 241 to the microprocessor 5, thereby causing the microprocessor 5 to generate
正確的換向控制信號，並將該換向控制信號傳送至該驅動 電路6，進而控制該壓縮機1運轉。 同理，請再參考第 m 圖及表1所示，若該 壓縮機i運轉於低速轉’假設鱗誠丨僅將產生 卿之反電勢，則該第-串聯接點211將該反電勢轉換成 :的直讀㈣壓’並述微處理機5 _的判斷 導通T多工器3之輸入端xo與輸出端0 使該破處理機5產生正確的換向控制信號。 請再參考第2及3圖所千,^ 用脈波寬度調變技術進發明之嶋1係利 的南頻雜訊，因此本發明在該，ρ反電勢將產生大里 及微處理機5之产號輸入山大、夕工态3之輸出端0 波“，以便細:反電勢 労之阿頻雜汛且該主動式低通濾 ΡΚ10384 07/07/02 12 200903980 波器4具有直流輸出電顯幅 於該主動式低通濾波器4係利用_;„同時，由 實現，因此其亦具有較麵阻抗匹配^大器〔未緣示〕 利述’^較於^壓縮機之無感測迴授電路僅 利用具有早一分壓比值之檢測電路9 電麵之偵測作業’其具有降低控制精確度丁之:點，： 測之反電勢等比例區分成數個操作區段，且該 分段檢測單元2之數個分壓電路21、22、23、24對^ ，個操作區段，因此可縮小該反電勢的檢測範圍，二 實可提尚控制精確度，進而增加控制該壓縮機丨運轉之穩 定性。 心 雖然本發明已利用上述較佳實施例揭示，然其並非 用以限定本發明，任何熟習此技藝者在不脫離本發明之精 神和範圍之内，相對上述實施例進行各種更動與修改仍屬 本發明所保護之技術範疇，因此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。 PK10384 07/07/02 13 200903980 【圖式簡單說明】 第1圖：習用壓縮機之無感測迴授電路之電路示意圖 镳 0 ’ 第2圖：本發明較佳實施例之壓縮機之無感測迴授電 路之電路不意圖。 第3圖：本發明較佳實施例之壓縮機之無感測迴授電 路之分段檢測早元電路不意圖。 【主要元件符號說明】 1 壓縮機 2 分段檢測早元 21 第一分壓電路 22 第二分壓電路 23 第三分壓電路 24 第四分壓電路 211 第一串聯接點 221 第二串聯接點 231 第三串聯接點 241 第四串聯接點 3 類比多工器 4 主動式低通濾波器 5 微處理機 6 驅動電路 90 壓縮機 91 檢測電路 92 微處理機 93 驅動電路 L 電力線 R 基本電阻 ZD 稽納二極體 R1 第一倍率電阻 R2 第二倍率電阻 R3 第三倍率電阻 R4 第四倍率電阻 X0 輸入端 XI 輸入端 X2 輸入端 X3 輸入端 〇 輸出端 A 選擇輸入端 B 選擇輸入端 PK10384 07/07/02 —14 200903980The correct commutation control signal is transmitted to the drive circuit 6 to control the operation of the compressor 1. For the same reason, please refer to the mth diagram and the table 1 again. If the compressor i is running at a low speed, it is assumed that the scale will only generate the back electromotive force, and the first series connection 211 converts the back EMF. The direct reading (four) pressure 'and the microprocessor 5 _'s judgment turns on the input terminal xo and the output terminal 0 of the T multiplexer 3 to cause the processor 5 to generate the correct commutation control signal. Please refer to the 2nd and 3rd drawings, ^ using the pulse width modulation technology to enter the invention of the 1st generation of the south frequency noise, so the present invention, the ρ back electromotive force will generate the Dali and the microprocessor 5 The output number is input to the output of the mountain and the night state of the 3 wave, "for the fine: the anti-potential 阿 阿 汛 汛 and the active low-pass filter 10384 07/07/02 12 200903980 wave 4 has DC output The active low-pass filter 4 is _; „ at the same time, realized by it, so it also has a relatively good surface impedance matching device [not shown] to describe the ^^ compared to the non-sensing of the compressor The circuit is only used to detect the operation of the electric circuit with the detection circuit 9 having the previous one-divided ratio. It has the control precision D: the point, the measured back EMF is divided into several operating segments, and the segment is divided into several segments. The plurality of voltage dividing circuits 21, 22, 23, 24 of the detecting unit 2 are opposite to each other, so that the detection range of the back EMF can be reduced, and the control accuracy can be improved, thereby increasing the control of the compressor. The stability of the operation. Although the present invention has been disclosed by the above-described preferred embodiments, it is not intended to limit the invention, and various modifications and changes to the above embodiments are possible without departing from the spirit and scope of the invention. The technical scope of the present invention is therefore intended to be defined by the scope of the appended claims. PK10384 07/07/02 13 200903980 [Simple description of the drawing] Fig. 1: Schematic diagram of the non-sensing feedback circuit of the conventional compressor 镳0' Fig. 2: The feeling of the compressor of the preferred embodiment of the present invention The circuit of the feedback circuit is not intended. Figure 3: The segmentation detection of the non-sensing feedback circuit of the compressor of the preferred embodiment of the present invention is not intended. [Main component symbol description] 1 Compressor 2 Section detection early element 21 First voltage dividing circuit 22 Second voltage dividing circuit 23 Third voltage dividing circuit 24 Fourth voltage dividing circuit 211 First series contact 221 Second series contact 231 third series contact 241 fourth series contact 3 analog multiplexer 4 active low pass filter 5 microprocessor 6 drive circuit 90 compressor 91 detection circuit 92 microprocessor 93 drive circuit L Power line R Basic resistance ZD Sense diode R1 First rate resistor R2 Second rate resistor R3 Third rate resistor R4 Fourth rate resistor X0 Input XI Input X2 Input X3 Input 〇 Output A Select input B Select input PK10384 07/07/02 —14 200903980
Ra 電阻Ra resistance
Rb 電阻Rb resistor
PK10384 07/07/02 15PK10384 07/07/02 15