TWI435534B - Lock detection device for feed motor - Google Patents
Lock detection device for feed motor Download PDFInfo
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Description
本發明係關於判斷進給馬達為驅動狀態或非驅動狀態之鎖止檢測裝置。The present invention relates to a lock detecting device that determines whether a feed motor is in a driven state or a non-driven state.
以往，於光碟驅動裝置中，作為藉由進給馬達檢測出讀寫頭到達驅動邊限位置(光碟的最內周或最外周)之機構，係使用機械式開關或光感測器開關(例如參照日本特開2000－173205號公報、日本特開平11－328887號公報、日本特開2000－67437號公報)。Conventionally, in a disk drive device, a mechanical switch or a photo sensor switch is used as a mechanism for detecting that the head reaches the drive margin position (the innermost circumference or the outermost circumference of the optical disk) by the feed motor (for example, Japanese Laid-Open Patent Publication No. 2000-173205, JP-A-H11-328887, and JP-A-2000-67437.
的確，若為上述以往的光碟驅動裝置，則可檢測出讀寫頭到達驅動邊限位置並使進給馬達停止。Indeed, in the case of the above-described conventional optical disk drive device, it is possible to detect that the head reaches the drive margin position and the feed motor is stopped.
然而，於上述以往的光碟驅動裝置中，由於使用機械式開關或光感測器開關，而導致構件成本的上升或裝置基板的大型化。此外，於使用機械式開關之情形時，必須考量到讀寫頭之承載上的變動，於使用光感測器開關之情形時，必須考量到雷射光量的變動或反射光量的變動，因而使其設定變得困難。However, in the above-described conventional optical disk drive device, the use of a mechanical switch or a light sensor switch causes an increase in component cost or an increase in size of the device substrate. In addition, in the case of using a mechanical switch, it is necessary to consider the variation in the load of the head. When using the light sensor switch, it is necessary to consider the variation of the amount of laser light or the variation of the amount of reflected light, thus Its setting becomes difficult.
上述課題不僅於光碟驅動裝置，亦存在於使用進給馬達之所有裝置中。The above problems are not only in the optical disc drive device but also in all devices using the feed motor.
本發明係鑒於上述問題點，其目的在於提供一種不會導致構件成本上升或裝置基板大型化，而能夠判斷進給馬達為驅動狀態或非驅動狀態之鎖止檢測裝置。The present invention has been made in view of the above problems, and it is an object of the invention to provide a lock detecting device capable of determining whether a feed motor is in a driven state or a non-driving state without causing an increase in component cost or an increase in size of a device substrate.
為了達成上述目的，本發明之進給馬達之鎖止檢測裝置係構成為，檢測進給馬達的反電壓，且根據其大小判斷前述進給馬達為驅動狀態或非驅動狀態。In order to achieve the above object, the lock detecting device of the feed motor of the present invention is configured to detect a counter voltage of the feed motor and determine whether the feed motor is in a drive state or a non-drive state based on the magnitude thereof.
此外，本發明之進給馬達之鎖止檢測裝置係構成為，檢測進給馬達的反電壓，且根據前述反電壓的極性變化是否發生，判斷前述進給馬達為驅動狀態或非驅動狀態。Further, the lock detecting device of the feed motor of the present invention is configured to detect a reverse voltage of the feed motor and determine whether the feed motor is in a drive state or a non-drive state based on whether or not a polarity change of the counter voltage occurs.
本發明之其他特徵、構件、步驟、優點及特點，可藉由下列實施型態的詳細敘述以及附加圖式的參照而更為明瞭。Other features, components, steps, advantages and features of the present invention will become more apparent from the detailed description of the appended claims.
圖1係裝載有本發明之進給馬達之鎖止檢測裝置的電氣機器(DVD驅動裝置、CD驅動裝置、藍光光碟驅動裝置、汽車音響、攝錄影機等之使用進給馬達之所有裝置)之一項實施型態的方塊圖。Fig. 1 is an electrical apparatus (a DVD drive device, a CD drive device, a Blu-ray disc drive device, a car stereo, a video camera, etc., using a feed motor) loaded with a lock detecting device of the feed motor of the present invention) A block diagram of an implementation.
如圖1所示，本實施型態之電氣機器係具備：進給馬達M；輸入訊號產生電路1a、1b；以及進給馬達驅動器2a、2b；此外，作為判斷上述進給馬達M為驅動狀態或非驅動狀態之鎖止檢測裝置，係具有：磁極切換檢測電路3a、3b；反電壓檢測電路4a、4b；以及驅動．非驅動判斷電路5而成。As shown in Fig. 1, the electric machine of the present embodiment includes: a feed motor M; input signal generating circuits 1a, 1b; and feed motor drivers 2a, 2b; and, in addition, as a judgment of the feed motor M as a drive state The lock detection device of the non-driving state has magnetic pole switching detection circuits 3a, 3b, counter voltage detecting circuits 4a, 4b, and driving. The non-driving determination circuit 5 is formed.
進給馬達M，係具有A相的馬達線圈La及B相的馬達線圈Lb而成之雙相進給馬達(包含DC馬達及步進馬達)。馬達線圈La的一端係連接於進給馬達驅動器2a的第1輸出端(A相輸出訊號AO＋的施加端)。馬達線圈La的另一端係連接於 進給馬達驅動器2a的第2輸出端(A相輸出訊號AO－的施加端)。馬達線圈Lb的一端係連接於進給馬達驅動器2b的第1輸出端(B相輸出訊號BO＋的施加端)。馬達線圈Lb的另一端係連接於進給馬達驅動器2b的第2輸出端(B相輸出訊號BO－的施加端)。The feed motor M is a two-phase feed motor (including a DC motor and a stepping motor) including a motor coil La of phase A and a motor coil Lb of phase B. One end of the motor coil La is connected to the first output end of the feed motor driver 2a (the application end of the A phase output signal AO+). The other end of the motor coil La is connected to The second output end of the feed motor driver 2a (the application end of the A phase output signal AO-). One end of the motor coil Lb is connected to the first output end of the feed motor driver 2b (the application end of the B-phase output signal BO+). The other end of the motor coil Lb is connected to the second output end of the feed motor driver 2b (the application end of the B-phase output signal BO-).
輸入訊號產生電路1a，係產生正弦波狀的A相輸入訊號AI，並將此訊號送出至進給馬達驅動器2a及磁極切換檢測電路3a之機構。輸入訊號產生電路1b，係產生正弦波狀的B相輸入訊號BI，並將此訊號送出至進給馬達驅動器2b及磁極切換檢測電路3b之機構。A相輸入訊號AI及B相輸入訊號BI係互以相位呈90∘而偏移。此外，輸入訊號產生電路1a、1b係具備因應檢測判斷訊號S4使輸入訊號AI、BI的產生動作停止之功能，關於該功能，將於之後詳細說明。The input signal generating circuit 1a is a mechanism that generates a sinusoidal A-phase input signal AI and sends the signal to the feed motor driver 2a and the magnetic pole switching detecting circuit 3a. The input signal generating circuit 1b is a mechanism that generates a sinusoidal B-phase input signal BI and sends the signal to the feed motor driver 2b and the magnetic pole switching detecting circuit 3b. The phase A input signal AI and the phase B input signal BI are offset by 90 相位 phase. Further, the input signal generating circuits 1a and 1b have a function of stopping the generation of the input signals AI and BI in response to the detection determination signal S4, and this function will be described in detail later.
進給馬達驅動器2a，為根據A相輸入訊號AI產生矩形波狀的A相輸出訊號AO＋、AO－，且將這些輸出訊號施加於馬達線圈La的兩端之機構。進給馬達驅動器2b，為根據B相輸入訊號BI產生矩形波狀的B相輸出訊號BO＋、BO－，且將這些輸出訊號施加於馬達線圈Lb的兩端之機構。A相輸出訊號AO＋、AO－及B相輸出訊號BO＋、BO－，係於進給馬達M的驅動時，使各個低位準期間或高位準期間進行PWM[Pulse Width Modulation：脈衝寬度調變]控制者。此外，進給馬達驅動器2a、2b係具備，因應驅動器控制訊號S2a、S2b，使各相的輸出訊號形成為高阻抗或是停止(或間隔進行)PWM驅動之功能，關於該功能，將於之後詳細 說明。The feed motor driver 2a is a mechanism for generating a rectangular wave-shaped A-phase output signals AO+, AO- based on the A-phase input signal AI, and applying these output signals to both ends of the motor coil La. The feed motor driver 2b is a mechanism for generating a rectangular wave-shaped B-phase output signals BO+, BO- based on the B-phase input signal BI, and applying these output signals to both ends of the motor coil Lb. The A phase output signals AO+, AO-, and B phase output signals BO+, BO- are PWM (Pulse Width Modulation) control during each low level period or high level period when the feed motor M is driven. By. In addition, the feed motor drivers 2a, 2b are provided with the function of forming the output signals of the respective phases into high impedance or stopping (or intermittently) PWM driving in response to the driver control signals S2a, S2b, and the function will be followed. detailed Description.
磁極切換檢測電路3a，為監測A相輸入訊號AI並產生磁極切換檢測訊號S1a，且將此訊號送出至驅動．非驅動判斷電路5之機構。磁極切換檢測電路3b，為監測B相輸入訊號BI並產生磁極切換檢測訊號S1b，且將此訊號送出至驅動．非驅動判斷電路5之機構。磁極切換檢測電路3a、3b係於進給馬達M的磁極切換處附近，建立磁極切換檢測訊號S1a、S1b的觸發脈衝，例如可使用於正負兩方具有特定的臨限值(例如±20[mV])之窗型比較器。The magnetic pole switching detection circuit 3a monitors the phase A input signal AI and generates the magnetic pole switching detection signal S1a, and sends the signal to the driving. The mechanism of the non-driving judgment circuit 5. The magnetic pole switching detection circuit 3b monitors the B-phase input signal BI and generates a magnetic pole switching detection signal S1b, and sends the signal to the driving. The mechanism of the non-driving judgment circuit 5. The magnetic pole switching detection circuits 3a, 3b are arranged near the magnetic pole switching position of the feed motor M, and the trigger pulses of the magnetic pole switching detection signals S1a, S1b are established, for example, for positive and negative sides having specific threshold values (for example, ±20 [mV] ]) Window type comparator.
反電壓檢測電路4a，為於以反電壓檢測控制訊號S3a所指示之時序中，從A相輸出訊號AO＋、AO－中檢測出A相反電壓AE，且將此送出至驅動．非驅動判斷電路5之機構。反電壓檢測電路4b，為於以反電壓檢測控制訊號S3b所指示之時序中，從B相輸出訊號BO＋、BO－中檢測出B相反電壓BE，且將此送出至驅動．非驅動判斷電路5之機構。The reverse voltage detecting circuit 4a detects the A opposite voltage AE from the A phase output signals AO+, AO- in the timing indicated by the reverse voltage detecting control signal S3a, and sends this to the driving. The mechanism of the non-driving judgment circuit 5. The reverse voltage detecting circuit 4b detects the B opposite voltage BE from the B phase output signals BO+, BO- in the timing indicated by the reverse voltage detecting control signal S3b, and sends the same to the driving. The mechanism of the non-driving judgment circuit 5.
驅動．非驅動判斷電路5，為根據A相、B相的反電壓AE、BE之大小判斷進給馬達M為驅動狀態或非驅動狀態，並以該判斷結果作為檢測判斷訊號S4，而送出至輸入訊號產生電路1a、1b之機構。此外，驅動．非驅動判斷電路5，亦具有根據磁極切換檢測訊號S1a、S1b而產生驅動器控制訊號S2a、S2b及反電壓檢測控制訊號S3a、3b之機構的功能。drive. The non-driving determination circuit 5 determines that the feed motor M is in the driving state or the non-driving state based on the magnitudes of the counter voltages AE and BE of the A phase and the B phase, and sends the determination signal to the input signal as the detection determination signal S4. The mechanism for generating the circuits 1a, 1b. In addition, drive. The non-driving determination circuit 5 also has a function of a mechanism for generating the driver control signals S2a, S2b and the counter voltage detection control signals S3a, 3b based on the magnetic pole switching detection signals S1a, S1b.
接著參照圖2，詳細說明進給馬達M的鎖止檢測動作。Next, the lock detecting operation of the feed motor M will be described in detail with reference to Fig. 2 .
圖2係用以說明進給馬達M的鎖止檢測動作之圖式，由 上依序描述A相輸入訊號AI、B相輸入訊號BI、A相輸出訊號AO＋、AO－、B相輸出訊號BO＋、BO－，A相反電壓AE、B相反電壓BE、及檢測判斷訊號S4的電壓波形。關於反電壓AE、BE，原先由驅動器輸出的PWM驅動所覆蓋而無法觀察出，但於本圖中，係假定將驅動器輸出設為常態高阻抗之情形，而概念性的描述各個電壓波形。Figure 2 is a diagram for explaining the lock detecting operation of the feed motor M, The A phase input signal AI, the B phase input signal BI, the A phase output signal AO+, the AO-, the B phase output signal BO+, BO-, the A opposite voltage AE, the B opposite voltage BE, and the detection determination signal S4 are sequentially described. Voltage waveform. The reverse voltages AE and BE are originally covered by the PWM drive output from the driver and cannot be observed. However, in this figure, the case where the driver output is set to the normal high impedance is assumed, and the respective voltage waveforms are conceptually described.
於進給馬達M的鎖止檢測動作時，磁極切換檢測電路3a、3b係分別監測A相輸入訊號AI及B相輸入訊號BI，且於進給馬達M的磁極切換處附近(A相參照圓形標記、B相參照三角標記)，建立磁極切換檢測訊號S1a、S1b的觸發脈衝。During the lock detection operation of the feed motor M, the magnetic pole switching detection circuits 3a and 3b monitor the A phase input signal AI and the B phase input signal BI, respectively, and are near the magnetic pole switching position of the feed motor M (A phase reference circle) The shape mark and the B phase reference triangle mark) establish trigger pulses of the magnetic pole switching detection signals S1a and S1b.
驅動．非驅動判斷電路5，為了於進給馬達M的磁極切換處附近(反電壓成為最大之點)檢測出與磁極切換具有關係之相的反電壓，係根據磁極切換檢測訊號S1a、S1b，產生驅動器控制訊號S2a、S2b及反電壓檢測控制訊號S3a、3b。drive. The non-driving determination circuit 5 detects the reverse voltage of the phase associated with the magnetic pole switching in the vicinity of the magnetic pole switching position of the feed motor M (the point at which the reverse voltage becomes the maximum), and generates the driver based on the magnetic pole switching detection signals S1a, S1b. Control signals S2a, S2b and counter voltage detection control signals S3a, 3b.
具體而言，於建立磁極切換檢測訊號S1a的觸發脈衝之情形時，係以從該時點開始的特定期間中使A相輸出訊號AO＋、AO－成為高阻抗之方式，產生驅動器控制訊號S2a，且以於上述特定期間中的特定時序檢測出A相反電壓AE之方式，產生反電壓檢測控制訊號S3a。另一方面，於建立磁極切換檢測訊號S1b的觸發脈衝之情形時，係以從該時點開始的特定期間中使B相輸出訊號BO＋、BO－成為高阻抗之方式，產生驅動器控制訊號S2b，且以於上述特定期間 中的特定時序檢測出B相反電壓BE之方式，產生反電壓檢測控制訊號S3b。Specifically, when the trigger pulse of the magnetic pole switching detection signal S1a is established, the driver control signal S2a is generated in such a manner that the phase A output signals AO+ and AO- become high impedance in a specific period from the time point, and The reverse voltage detection control signal S3a is generated in such a manner that the A opposite voltage AE is detected at a specific timing in the above specific period. On the other hand, when the trigger pulse of the magnetic pole switching detection signal S1b is established, the driver control signal S2b is generated in such a manner that the B-phase output signals BO+ and BO- become high impedance in a specific period from the time point, and For the above specific period The specific timing in the detection of the B opposite voltage BE produces a reverse voltage detection control signal S3b.
關於上述特定期間，可於電路內部設定馬達線圈La、Lb的電感達到安定為止之所需期間(因馬達線圈La、Lb的不同而有極大差別，例如為數百[μs])。In the specific period described above, the period required for the inductance of the motor coils La and Lb to be stabilized (the difference between the motor coils La and Lb, for example, several hundred [μs]) can be set in the circuit.
此外，鑒於在進給馬達M為非驅動狀態時，其反電壓幾乎為零之情形，驅動．非驅動判斷電路5係根據所檢測之反電壓的大小，判斷進給馬達M為驅動狀態(為反電壓較特定值還大之狀態)或非驅動狀態(為反電壓較特定值還小之狀態)，並以該判斷結果作為檢測判斷訊號S4，而送出至輸入訊號產生電路1a、1b。例如，於判斷進給馬達M為驅動狀態時，檢測判斷訊號S4係設定為低位準，於判斷進給馬達M為非驅動狀態時，檢測判斷訊號S4設定為高位準。In addition, in view of the fact that when the feed motor M is in a non-driven state, its reverse voltage is almost zero, driving. The non-driving determination circuit 5 determines whether the feed motor M is in a driving state (a state in which the counter voltage is larger than a specific value) or a non-driving state (in a state in which the counter voltage is smaller than a specific value) based on the magnitude of the detected counter voltage. And the result of the determination is sent to the input signal generating circuits 1a, 1b as the detection determination signal S4. For example, when it is determined that the feed motor M is in the drive state, the detection determination signal S4 is set to the low level, and when it is determined that the feed motor M is in the non-drive state, the detection determination signal S4 is set to the high level.
於驅動．非驅動判斷電路5中，與反電壓比較之臨限值可構成為可變值。藉由此構成，可對應於進給馬達M的特性變動(因馬達特性所造成之扭矩的降低)。Driven by. In the non-driving determination circuit 5, the threshold value compared with the counter voltage can be configured as a variable value. According to this configuration, it is possible to correspond to the characteristic variation of the feed motor M (the decrease in the torque due to the motor characteristics).
輸入訊號產生電路1a、1b，於接受表示出進給馬達M為非驅動狀態之邏輯(於上述例子中為高位準)的檢測判斷訊號S4時，係停止輸入訊號AI、BI的產生動作。The input signal generating circuits 1a and 1b stop the generation of the input signals AI and BI when receiving the detection determination signal S4 indicating that the feed motor M is in the non-driving state (high level in the above example).
如上述所示，本發明之進給馬達M之鎖止檢測裝置係構成為，檢測出進給馬達M的反電壓並根據該大小而判斷進給馬達M為驅動狀態或非驅動狀態。藉由此構成，可較使用機械式開關或光感測器開關之先前構成，更可實現構件成本的降低或裝置基板的小型化。此外，亦不需考量與機 械式開關或光感測器開關，或是其他追加構件相關之變動，因此其設定極為容易。As described above, the lock detecting device of the feed motor M of the present invention is configured to detect the reverse voltage of the feed motor M and determine whether the feed motor M is in the drive state or the non-drive state based on the magnitude. With this configuration, the previous configuration of the mechanical switch or the photosensor switch can be used, and the component cost can be reduced or the device substrate can be miniaturized. In addition, there is no need to consider Mechanical switches or light sensor switches, or other additional components related changes, so the setting is extremely easy.
此外，本發明之進給馬達M之鎖止檢測裝置係構成為，於進給馬達M的磁極切換處附近進行反電壓的檢測。如此，若構成為僅以與磁極切換具有關係之相作為反電壓的檢測對象，則不會對裝置的驅動電流造成影響，因此於反電壓的檢測時不會產生不需要的驅動雜訊。Further, the lock detecting device of the feed motor M of the present invention is configured to detect the reverse voltage in the vicinity of the magnetic pole switching position of the feed motor M. As described above, if only the phase associated with the magnetic pole switching is used as the detection target of the reverse voltage, the driving current of the device is not affected, so that unnecessary driving noise is not generated at the time of detecting the reverse voltage.
於磁極切換處附近，於使A相輸出訊號AO＋、AO－成為高阻抗之期間中，若持續進行B相輸出訊號BO＋、BO－的PWM驅動，則A相輸出訊號AO＋、AO－會受到上述PWM驅動的影響而變得不安定，導致A相反電壓AE之檢測精準度的降低。相反的，於使B相輸出訊號BO＋、BO－成為高阻抗之期間中，若持續進行A相輸出訊號AO＋、AO－的PWM驅動，則B相輸出訊號BO＋、BO－會受到上述PWM驅動的影響而變得不安定，導致B相反電壓BE之檢測精準度的降低。In the vicinity of the magnetic pole switching, during the period in which the A-phase output signals AO+ and AO- become high impedance, if the PWM driving of the B-phase output signals BO+ and BO- is continued, the A-phase output signals AO+, AO- will be subjected to the above. The influence of the PWM drive becomes unstable, resulting in a decrease in the detection accuracy of the A opposite voltage AE. Conversely, during the period in which the B-phase output signals BO+ and BO- become high impedance, if the PWM drive of the A-phase output signals AO+ and AO- is continued, the B-phase output signals BO+, BO- are driven by the PWM. The effect becomes unstable, resulting in a decrease in the detection accuracy of the B opposite voltage BE.
因此，本發明之進給馬達M之鎖止檢測裝置係構成為，從一相輸出對反電壓進行檢測時，使其餘的相輸出安定化。Therefore, the lock detecting device of the feed motor M of the present invention is configured to stabilize the remaining phase outputs when detecting the reverse voltage from the one-phase output.
具體而言，於對A相反電壓AE進行檢測時，係以配合該檢測時序而暫時停止B相輸出訊號BO＋、BO－的PWM驅動之方式，從驅動．非驅動判斷電路5當中將驅動器控制訊號S2b送出至進給馬達驅動器2b。相反的，於對B相反電壓BE進行檢測時，係以配合該檢測時序而暫時停止A相輸出 訊號AO＋、AO－的PWM驅動之方式，從驅動．非驅動判斷電路5當中將驅動器控制訊號S2a送出至進給馬達驅動器2a。Specifically, when detecting the opposite voltage AE of A, the PWM driving of the B-phase output signals BO+, BO- is temporarily stopped in accordance with the detection timing, and the driving is performed. The drive control signal S2b is sent to the feed motor driver 2b in the non-drive determination circuit 5. Conversely, when the B opposite voltage BE is detected, the phase A output is temporarily stopped in accordance with the detection timing. Signal AO+, AO- PWM drive mode, slave drive. The drive control signal S2a is sent to the feed motor driver 2a in the non-drive determination circuit 5.
關於PWM驅動的暫時停止，可藉由間隔進行各相輸出訊號的PWM脈衝或SB(VCC短路、GND短路)予以實現。The temporary stop of the PWM drive can be realized by PWM pulse or SB (VCC short circuit, GND short circuit) of each phase output signal.
圖3係用以說明反電壓檢測時之PWM停止控制之圖式，於本圖中，係顯示A相輸出訊號AO＋、AO－的動作為一例。Fig. 3 is a diagram for explaining the PWM stop control at the time of back voltage detection. In the figure, the operation of the A phase output signals AO+ and AO- is shown as an example.
藉由此構成，可在不受到PWM驅動的影響下，進行安定的反電壓檢測，因此可防止驅動．非驅動的錯誤檢測。By this configuration, stable reverse voltage detection can be performed without being affected by the PWM drive, thereby preventing driving. Non-driven error detection.
此外，於進給馬達M中，可能因該製造變動等，而產生如圖4所示，即使驅動進給馬達M，於低頻率時僅於單相(於本圖中為B相)中亦無法獲得充分的反電壓。Further, in the feed motor M, as a result of the manufacturing variation or the like, as shown in FIG. 4, even if the feed motor M is driven, it is only in a single phase (B phase in the figure) at a low frequency. Failed to get a full counter voltage.
因此，本發明之進給馬達M之鎖止檢測裝置係構成為，於所有相的反電壓皆未達到特定值時，判斷進給馬達M為非驅動狀態。Therefore, the lock detecting device of the feed motor M of the present invention is configured to determine that the feed motor M is in the non-driving state when the reverse voltages of all the phases have not reached a specific value.
具體而言，驅動．非驅動判斷電路5，於判斷各相的反電壓AE、BE皆小於特定值時，係判斷進給馬達M為非驅動狀態，而使檢測判斷訊號S4從低位準上升至高位準(參照圖2)。Specifically, drive. When the non-driving determination circuit 5 determines that the reverse voltages AE and BE of the respective phases are smaller than a specific value, it is determined that the feed motor M is in a non-driving state, and the detection determination signal S4 is raised from a low level to a high level (refer to FIG. 2). ).
藉由此構成，可在不受到馬達特性的變動(因馬達特性所造成之扭矩的降低)之影響下，防止驅動．非驅動的錯誤檢測。惟本發明之構成並不限定於此，只要為以進給馬達M的負擔降低為優先，則亦可構成為，於判斷一相的反 電壓小於特定值之時點，立即判斷進給馬達M為非驅動狀態並予以停止。By this configuration, it is possible to prevent driving without being affected by fluctuations in motor characteristics (reduction in torque due to motor characteristics). Non-driven error detection. However, the configuration of the present invention is not limited thereto, and it may be configured to determine the inverse of one phase as long as the burden on the feed motor M is prioritized. When the voltage is less than a specific value, the feed motor M is immediately judged to be in a non-driving state and stopped.
如以上所詳述般，本發明之進給馬達M之鎖止檢測裝置，如圖5A所示，可構成為檢測出伴隨進給馬達M的旋轉之反電壓，並根據該大小而判斷進給馬達M為驅動狀態或非驅動狀態。As described in detail above, the lock detecting device of the feed motor M of the present invention can be configured to detect the counter voltage accompanying the rotation of the feed motor M as shown in FIG. 5A, and determine the feed according to the magnitude. The motor M is in a driven state or a non-driven state.
以往為人所知者有，如圖5B所示，係將因應輸入之扭矩施加於主軸馬達，比較伴隨主軸馬達的旋轉之反電壓與共通端子電壓，測定反電壓穿越共通端子電壓之時間，並根據該長度檢測出主軸馬達的轉數之技術，本發明與該先前技術，僅於檢測出馬達的反電壓之方面為一致，其本質性構成有所不同者乃極為明顯。As is known in the prior art, as shown in FIG. 5B, the torque input to the spindle motor is applied, and the counter voltage and the common terminal voltage accompanying the rotation of the spindle motor are compared, and the time during which the counter voltage crosses the common terminal voltage is measured. According to the technique of detecting the number of revolutions of the spindle motor based on the length, the present invention and the prior art are identical in that only the reverse voltage of the motor is detected, and the essential configuration is extremely different.
本發明之構成除了上述實施型態之外，可在不脫離發明主旨之範圍內進行種種的變更。The configuration of the present invention can be variously modified without departing from the spirit and scope of the invention.
例如，於上述實施型態中，係以使用雙相的進給馬達M之構成為例進行說明，但本發明之構成並不限定於此，可使用單相的進給馬達M，亦可使用3相、4相、...、n相(n≧2)之進給馬達。For example, in the above-described embodiment, the configuration of the feed motor M using two phases will be described as an example. However, the configuration of the present invention is not limited thereto, and a single-phase feed motor M may be used, and may be used. 3-phase, 4-phase, ..., n-phase (n≧2) feed motor.
此外，於上述實施型態中，係以檢測出伴隨進給馬達M的旋轉之反電壓，並根據該大小而判斷進給馬達M為驅動狀態或非驅動狀態之構成為例進行說明，但本發明之構成並不限定於此，亦可構成為，於每個A相反電壓AE(或B相反電壓BE)的檢測時序，根據A相反電壓AE(或B相反電壓BE)的極性變化是否發生(換言之，如圖6所示，A相的正相 反電壓AE＋與反相反電壓AE－之間的高低(或B相的正相反電壓BE＋與反相反電壓BE－之間的高低)是否交互逆轉)，而判斷前述進給馬達M為驅動狀態或非驅動狀態。Further, in the above-described embodiment, a configuration in which the counter voltage accompanying the rotation of the feed motor M is detected and the feed motor M is determined to be in the drive state or the non-driving state is described as an example. The configuration of the invention is not limited thereto, and may be configured such that the polarity change of the A opposite voltage AE (or B opposite voltage BE) occurs at the detection timing of each A opposite voltage AE (or B opposite voltage BE) ( In other words, as shown in Figure 6, the positive phase of phase A Whether the height between the counter voltage AE+ and the opposite voltage AE- (or the level between the positive opposite voltage BE+ of the B phase and the opposite voltage BE-) is reversed, and the feed motor M is judged to be driven or not. Drive status.
圖7係驅動．非驅動判斷電路5的一項構成例之方塊圖。Figure 7 is the driver. A block diagram of a configuration example of the non-driving determination circuit 5.
如圖7所示，本構成例之驅動．非驅動判斷電路5係具有：判斷A相反電壓AE的極性(＋/－)之比較器51；以磁極切換檢測訊號S1a(正確而言，磁極切換檢測訊號S1a的延遲訊號)為觸發，保持比較器51的輸出訊號之第1閂鎖電路52(用以保持表示出在目前檢測的時序中所檢測之A相反電壓AE的極性之邏輯訊號之機構)；以磁極切換檢測訊號S1a為觸發，保持第1閂鎖電路52的輸出訊號之第2閂鎖電路53(用以保持表示出在先前檢測的時序中所檢測之A相反電壓AE的極性之邏輯訊號之機構)；及判斷第1、第2閂鎖電路52、53的各輸出邏輯是否一致之一致判斷部54而成。As shown in Figure 7, the drive of this configuration example. The non-driving judging circuit 5 has a comparator 51 for judging the polarity (+/-) of the A opposite voltage AE; and the magnetic pole switching detection signal S1a (correctly, the delay signal of the magnetic pole switching detection signal S1a) is triggered, and the comparison is maintained. The first latch circuit 52 of the output signal of the device 51 (a mechanism for holding a logic signal indicating the polarity of the A opposite voltage AE detected in the currently detected timing); and the magnetic pole switching detection signal S1a is used as a trigger to maintain a second latch circuit 53 of the output signal of the first latch circuit 52 (a mechanism for holding a logic signal indicating the polarity of the A opposite voltage AE detected in the previously detected timing); The matching determination unit 54 is formed by whether or not the respective output logics of the latch circuits 52 and 53 match each other.
藉由此構成，可防止錯誤測，並且亦可對應於進給馬達M的特性變動(因馬達特性所造成之扭矩的降低)。With this configuration, it is possible to prevent erroneous measurement, and it is also possible to correspond to variations in characteristics of the feed motor M (reduction in torque due to motor characteristics).
此外，於圖7中，係以僅監視A相反電壓AE之構成為例進行說明，但本發明之構成並不限定於此，如圖8所示，亦可構成為，對於B相反電壓BE，於每個檢測時序判斷極性變化是否發生，並根據A相、B相的兩判斷結果，而判斷進給馬達M之驅動．非驅動。Further, in FIG. 7, the configuration in which only the A opposite voltage AE is monitored will be described as an example. However, the configuration of the present invention is not limited thereto, and as shown in FIG. 8, the B reverse voltage BE may be configured. It is judged whether or not the polarity change occurs at each detection timing, and the driving of the feed motor M is judged according to the two judgment results of the A phase and the B phase. Non-driven.
此時，可構成為於檢測出A相、B相均未發生反電壓的極性變化時，判斷進給馬達M為非驅動狀態，或是構成為於檢測出A相、B相的任一相未發生反電壓的極性變化之 時點，判斷進給馬達M為非驅動狀態。In this case, when it is detected that the polarity change of the reverse voltage does not occur in the A phase and the B phase, the feed motor M is determined to be in a non-driving state, or any phase of the A phase and the B phase is detected. No polarity change of the reverse voltage occurs At the time, it is judged that the feed motor M is in a non-driving state.
此外，關於各自判斷反電壓AE、BE之比較器51、55，較理想為，於進給馬達M處於非驅動狀態後即使於反電壓AE、BE產生顫振之情形時，亦以可正確判斷該極性之方式，對臨限值賦予補償。Further, it is preferable that the comparators 51 and 55 that respectively determine the counter voltages AE and BE are correctly judged even when the counter voltages AE and BE generate chattering after the feed motor M is in the non-driving state. The way of this polarity gives compensation to the threshold.
如上述般，根據本發明，可在不會導致構件成本的上升或裝置基板的大型化下，判斷進給馬達為驅動狀態或非驅動狀態。As described above, according to the present invention, it is possible to judge whether the feed motor is in the drive state or the non-drive state without causing an increase in the component cost or an increase in the size of the device substrate.
針對本發明之產業上的可利用性詳細敘述，本發明對於DVD驅動裝置、CD驅動裝置、藍光光碟驅動裝置、汽車音響、攝錄影機等之使用進給馬達之所有裝置為有用的技術，例如，可作為檢測出光碟驅動裝置的讀寫頭到達驅動邊限位置(光碟的最內周或最外周)，而使進給馬達停止之機構而利用。The present invention is a useful technique for all devices using a feed motor such as a DVD drive device, a CD drive device, a Blu-ray disc drive device, a car stereo, a video camera, etc., in view of the industrial applicability of the present invention. For example, it can be used as a mechanism for detecting that the head of the optical disk drive device reaches the driving margin position (the innermost circumference or the outermost circumference of the optical disk) and stops the feed motor.
本發明係參照上述實施型態而詳細說明，但就該業者而言所能夠明瞭的是，可對上述所描述之本發明進行種種的修正並思考出上述所未描述之各種實施型態。因此，在不脫離本發明之精神及範圍內，可於申請專利範圍內進行各種修正且這些修正均屬於本發明之範圍。The present invention has been described in detail with reference to the embodiments described above, but it is obvious to those skilled in the art that various modifications of the invention described above may be made and the various embodiments described above are contemplated. Therefore, various modifications may be made without departing from the spirit and scope of the invention and the scope of the invention
1a、1b‧‧‧輸入訊號產生電路1a, 1b‧‧‧ input signal generation circuit
2a、2b‧‧‧進給馬達驅動器2a, 2b‧‧‧feed motor drive
3a、3b‧‧‧磁極切換檢測電路3a, 3b‧‧‧ magnetic pole switching detection circuit
4a、4b‧‧‧反電壓檢測電路4a, 4b‧‧‧ anti-voltage detection circuit
5‧‧‧驅動．非驅動判斷電路5‧‧‧ Drive. Non-drive judgment circuit
La、Lb‧‧‧馬達線圈La, Lb‧‧‧ motor coil
AI‧‧‧A相輸入訊號AI‧‧‧A phase input signal
BI‧‧‧B相輸入訊號BI‧‧‧B phase input signal
AO＋、AO－‧‧‧A相輸出訊號AO+, AO-‧‧‧A phase output signal
BO＋、BO－‧‧‧B相輸出訊號BO+, BO-‧‧‧B phase output signal
S1a、S1b‧‧‧磁極切換檢測訊號S1a, S1b‧‧‧ magnetic pole switching detection signal
S2a、S2b‧‧‧驅動器控制訊號S2a, S2b‧‧‧ drive control signals
S3a、S3b‧‧‧反電壓檢測控制訊號S3a, S3b‧‧‧ anti-voltage detection control signal
S4‧‧‧檢測判斷訊號S4‧‧‧Detection and judgment signals
AE‧‧‧A相反電壓AE‧‧‧A opposite voltage
BE‧‧‧B相反電壓BE‧‧‧B opposite voltage
51、55‧‧‧比較器51, 55‧‧‧ comparator
52、56‧‧‧第1閂鎖電路52, 56‧‧‧1st latch circuit
53、57‧‧‧第2閂鎖電路53, 57‧‧‧2nd latch circuit
54、58‧‧‧一致判斷部54, 58‧‧‧Consensus Department
M‧‧‧進給馬達M‧‧‧ feed motor
圖1係裝載有本發明之進給馬達之鎖止檢測裝置的電氣機器之一項實施型態的方塊圖。BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a block diagram showing an embodiment of an electrical machine loaded with a lock detecting device of a feed motor of the present invention.
圖2係用以說明進給馬達M的鎖止檢測動作之圖式。Fig. 2 is a view for explaining the lock detecting operation of the feed motor M.
圖3係用以說明反電壓檢測時之PWM停止控制之圖式。Fig. 3 is a diagram for explaining PWM stop control at the time of back voltage detection.
圖4係馬達特性的一例之圖式。Fig. 4 is a diagram showing an example of motor characteristics.
圖5A、圖5B係用以比較本發明之進給馬達之鎖止檢測控制與主軸馬達之轉數檢測控制之間的不同處之圖式。5A and 5B are views for comparing the difference between the lock detection control of the feed motor of the present invention and the rotation number detection control of the spindle motor.
圖6係用以說明進給馬達M的鎖止檢測動作之其他例子之圖式。Fig. 6 is a view for explaining another example of the lock detecting operation of the feed motor M.
圖7係驅動．非驅動判斷電路5的一項構成例之方塊圖。Figure 7 is the driver. A block diagram of a configuration example of the non-driving determination circuit 5.
圖8係驅動．非驅動判斷電路5之其他的一項構成例之方塊圖。Figure 8 is a driver. A block diagram of another configuration example of the non-driving judgment circuit 5.
1a、1b‧‧‧輸入訊號產生電路1a, 1b‧‧‧ input signal generation circuit
2a、2b‧‧‧進給馬達驅動器2a, 2b‧‧‧feed motor drive
3a、3b‧‧‧磁極切換檢測電路3a, 3b‧‧‧ magnetic pole switching detection circuit
4a、4b‧‧‧反電壓檢測電路4a, 4b‧‧‧ anti-voltage detection circuit
5‧‧‧驅動．非驅動判斷電路5‧‧‧ Drive. Non-drive judgment circuit
La、Lb‧‧‧馬達線圈La, Lb‧‧‧ motor coil
AI‧‧‧A相輸入訊號AI‧‧‧A phase input signal
BI‧‧‧B相輸入訊號BI‧‧‧B phase input signal
AO＋、AO－‧‧‧A相輸出訊號AO+, AO-‧‧‧A phase output signal
BO＋、BO－‧‧‧B相輸出訊號BO+, BO-‧‧‧B phase output signal
S１a、S1b‧‧‧磁極切換檢測訊號S1a, S1b‧‧‧ magnetic pole switching detection signal
S2a、S2b‧‧‧驅動器控制訊號S2a, S2b‧‧‧ drive control signals
S3a、S3b‧‧‧反電壓檢測控制訊號S3a, S3b‧‧‧ anti-voltage detection control signal
S4‧‧‧檢測判斷訊號S4‧‧‧Detection and judgment signals
AE‧‧‧A相反電壓AE‧‧‧A opposite voltage
BE‧‧‧B相反電壓BE‧‧‧B opposite voltage
M‧‧‧進給馬達M‧‧‧ feed motor
Claims (9)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007061234 | 2007-03-12 | ||
| JP2008015835A JP5406455B2 (en) | 2007-03-12 | 2008-01-28 | Feed motor lock detection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| TW200903981A TW200903981A (en) | 2009-01-16 |
| TWI435534B true TWI435534B (en) | 2014-04-21 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| TW097108380A TWI435534B (en) | 2007-03-12 | 2008-03-10 | Lock detection device for feed motor |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP5406455B2 (en) |
| CN (1) | CN101267175B (en) |
| TW (1) | TWI435534B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5501181B2 (en) * | 2010-09-29 | 2014-05-21 | 株式会社荏原製作所 | Electromagnet controller |
| JP6223714B2 (en) * | 2013-05-28 | 2017-11-01 | 本田技研工業株式会社 | Electric power steering device |
| US10075107B2 (en) * | 2015-11-03 | 2018-09-11 | Nxp Usa, Inc. | Method and apparatus for motor lock or stall detection |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11318098A (en) * | 1998-04-30 | 1999-11-16 | Toshiba Corp | Inverter device |
| JP3837986B2 (en) * | 1999-12-24 | 2006-10-25 | 三菱電機株式会社 | Permanent magnet type motor, control method for permanent magnet type motor, control device for permanent magnet type motor, compressor, refrigeration / air conditioner. |
| JP2003123277A (en) * | 2001-10-18 | 2003-04-25 | Sony Corp | Recording/reproducing device for disk-shaped recording medium |
| JP4718150B2 (en) * | 2003-10-29 | 2011-07-06 | カルソニックカンセイ株式会社 | Indicating instrument |
| JP4820053B2 (en) * | 2003-12-25 | 2011-11-24 | 富士重工業株式会社 | Motor rotation stop detection device |
| JP2007017360A (en) * | 2005-07-11 | 2007-01-25 | Calsonic Kansei Corp | Indicating instrument |
-
2008
- 2008-01-28 JP JP2008015835A patent/JP5406455B2/en active Active
- 2008-03-10 TW TW097108380A patent/TWI435534B/en active
- 2008-03-12 CN CN2008100835941A patent/CN101267175B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
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| JP5406455B2 (en) | 2014-02-05 |
| CN101267175A (en) | 2008-09-17 |
| TW200903981A (en) | 2009-01-16 |
| CN101267175B (en) | 2011-03-09 |
| JP2008259404A (en) | 2008-10-23 |
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