1324438 玖、發明說明 【發明所屬之技術領域】 本發明係有關無勵磁作動型制動器之勵磁控制裝置。 【先前技術】 一般說來，周知爲制動電動機的具有電磁制動器的電 動機藉由切斷電源，亦即藉由無勵磁化，作動制動器，進 行急速停止。 第1 〇圖是組合無勵磁作動型直流制動器乃於交流電動 機的配置，其藉插入對交流電動機Μ供電的饋電路的電磁 接觸器MC，對電動機Μ進行供電的通斷，並且在對電動機 供電時，將爲連接於電動機Μ與電磁接觸器MC之間的二極 體、D2所整流的輸出供至制動器Β，成制動器不作動狀 態，於對電動機的供電停止時，作動制動器，使其成爲無 勵磁。 第Η圖是連接二極體Eh及02所構成整流電路於電磁接 觸器MC的電源側，將電磁接觸器MC的輔助接點插入上述 二極體與制動器之間的配置。 第11圖於第9圖的二極體整流電路設置輔助繼電器RX ，同時，將其接點插入二極體D,、02與制動器B之間。 【發明內容】 (發明欲解決之問題） 上述第9圖至第1]圖的各電路分別具有如次缺點。 -4 - (2) (2)1324438 第9圖的電路的電磁接觸器MC —旦於電動機停止時導 通，到目前爲止蓄積於制動器B的線圈的電磁能量即如圖中 箭頭所示以循環電流的形式流動，繼續暫時勵磁狀態。這會 出現因此而發生的制動器的作動滯後。又，在制動器未作 動期間內，電動機起殘留磁氣的發電作用，由於此電流經 由二極體D】、D2流入制動器，故進一步繼續保持勵磁狀態 〇 由於在第10圖中，二極體Di、02與制動器B之間藉電磁 接觸器MC的接點切斷，故以此作爲制動器的作動時間滯後 的對策。不過，電路構造複雜，又在電磁接觸器MC與電動 機Μ間的距離遠時，需要額外的配線用電線的費用以及施工 費用等。 由於在第11圖中，使用交流繼電器RX，接點的恢復時 間較短，因此，雖然性能較第1 0圖的裝置高，卻因接點恢 復時間上有誤差而出現制動作動時間不確定。並且由於是有 接點電路，故有壽命短或容易受到周圍氣體影響等問題。 第12Α、12Β圖顯示對此種不便採取對策的習知無接點 式制動電動機的制動控制裝置的兩個例子，第1 2Α圖是電壓 檢測型電路，第]2 Β是電流檢測型電路。 並且，第10Α圖所示電路是對電動機Μ供給的電壓一停 止’即作動制動器Β的電路，其爲使用單穩等諧振盪器ΜΜ ’延長對制動器通電的時間，穩定經由場效電晶體Q對制動 器Β的供電的構造。並且，端子1-4例如連接於第〗1圖中制 動器勵磁電路的端子]-4，使制動器β通電。 (3) (3)1324438 又，第10B圖所示電路是對電動機Μ供給的電流一停 止’即作動制動器的電路，其爲藉變流器CT檢測電流，穩 定經由光電耦合器P C及場效電晶體Q對制動器Β的供電的 構造。並且，例如連接於第9圖中的制動器勵磁電路的端 子1-6，使制動器Β通電。 藉由採用這些制動器通電電路，制動電動機的制動器 勵磁電路的動作變得較接點式電路更穩定。 另一方面，檢討在電路構造方面更簡化的可能性，進 一步求得簡單的電路構造。 另一方面，第13圖是將二極體0!及02所構成的整流電 路連接於電磁接觸器M C的電源測，把電磁接觸器M C的輔 助接點插入上述二極體與制動器之間的裝置。 由於此第13圖所示電路藉電磁接觸器MC的接點切斷 二極體D】、02與制動器Β之間，故其成爲對制動器作動時 間滯後的問題的對策。 不過，在電路構造複雜，又，電磁接觸器MC與電動 機Μ間的距離遠時，需要額外的配線用電線的費用以及施 工費用等。 又，電動機Μ的驅動控制電路是如第14圖所示，使用 變流器的電路。其爲將變流器IN V插入電磁接觸器MC]與 電動機Μ之間，進行電動機Μ起動時及停止時的軟起動及 軟停止》 由於此電路於起動時及停止時減少變流器IN V的輸出 =故無法藉由變流器IN V的輸出作動制動器B。因此，制 (4) (4)1324438 動器B的電源自變流器IN V的電源側分歧出來，爲了對制 動器進行饋電控制，設置隨著變流器IN V的動作作動的繼 電器RY以及電磁接觸器MC2。 結果，附屬於變流器IN V的電路構造變得相當複雜。 發明槪要 本發明是考慮上述要點而提出的技術，其目的在於提 供動作穩定，並且，電路構造簡單的無勵磁作動型制動器 的勵磁控制裝置。 爲了達成上述目的，本發明提供一種無勵磁作動型制 動器之勵磁控制裝置，此裝置是隨著利用電磁接觸器所作 交流電動機的電源通斷，於電源切斷時，作動安裝於前述 電動機的無勵磁作動型電磁制動器。又在電源導通時，解 除該制動器的無勵磁作動型制動器之勵磁控制裝置，設置 檢測前述電動機的通電狀態，形成整流的訊號的訊號形成 電路，具有發光元件和發電性受光元件，本身爲顯示有緩 慢輸出下降特性的光電耦合器，供給前述訊號形成電路的 輸出，光電式進行訊號的發送接收的訊號耦合器，以及插 入前述電源與前述制動器之間，一供給前述訊號耦合器的 輸出訊號即導通，自前述電源饋電給前述電磁制動器的開 關電路；以及 一種無勵磁作動型制動器之勵磁控制裝置，此裝置是 隨著利用電磁接觸器所作交流電動機的電源通斷，於電源 切斷時，作動安裝於前述電動機的無勵磁作動型電磁制動 (5) (5)1324438 器，又在電源導通時，解除該制動器的無勵磁作動型制動 器之勵磁控制裝置，特徵在於設置檢測前述電動機的通電 電流的電流檢測手段，響應此電流檢測手段的輸出形成發 光訊號的發光手段，接收來自此發光手段的發光訊號的受 光手段以及具有開關元件，於前述受光手段接收發光訊號 時，導通前述開關元件，將制動器解除電流供至前述制動 器的制動器通電電路。 【實施方式】 發明之實施形態 第1圖是顯示本發明一實施例的電路構造的電路圖。此 電路是就習知電路而言以第10B圖所示電路作爲基礎的構造 ’檢測電動機的電流，若電流歸零，即作動制動器的電路 〇 此電路如就第10B圖所說明，分別將端子1至6連接於第 9圖中的各端子1至6來使用。對端子1、2供給電動機Μ的相 間電壓，端子3' 4連接於制動器Β的端子，端子5、6連接 於電動機Μ的電流檢測用變流器CT。 藉端子1、2供給的電動機Μ的電壓藉整流器11進行半 波整流，經由端子3、4供至圖略的制動器Β。作爲開關元 件的場效電晶體1 5插入端子2與端子4之間，此場效電晶體 1 5藉電動機Μ的電流檢測訊號通斷。 爲了檢測此電動機Μ的電流，變流器CT的檢測電流藉 含波整流電路]2整流，供至作爲訊號耦合器的光電耦合器 -8- (6) (6)1324438 ]3的發光二極體。全波整流電路12具有橋式整流電路及定 電壓二極體，將恒定化的電壓供至發光二極體。 其中，光電耦合器13是光伏特（品名）式，此光伏特 式光電耦合器的受光元件由於具有發電性，故無需電源， 又具有受光開始時的輸出上升快速，受光停止時的輸出下 降緩慢的特性。 附帶說明發電性，藉由使用光伏特式受光元件，比對 第1圖的電路，無需第10B圖的電路中作爲對光電耦合器 PC的受光元件供電的元件的二極體1個 '電阻2個、電解電 容器1個、齊納二極體1個、電路得到簡化 結果，即使在自光電耦合器〗3的發光元件供給斷續的 光情形下，要是斷續的間隔小到某一程度，受光元件的輸 出仍連續化。因此，無需在使用一般受光二極體或光電電 晶體作爲受光元件情形下所需要的時間常數電路。 亦即，受光元件爲了形成所需電壓固然須串聯連接適 當數，不過，無需作爲延時電路的CR電路，受光元件的 輸出經由電阻14a、】4b供至場效電晶體15的閘極。其中亦可 省略串聯連接於場效電晶體Q的閘極的電阻1 4b。 因此，電路的簡化由零件數的減少亦可明白。 第2圖及第3圖是顯示第1圖電路中的光電耦合器PC、響 應此光電耦合器PC的輸出作動的場效電晶體Q和有關端子4 的部份的電路以及此電路各部的訊號波形的圖面。 第2圖所示電路經由開關SW對光電耦合器PC的發光元 件供給電壓V 1，流出電流1。隨此，受光元件產生電壓，其 -9- (7) (7)1324438 經由電阻旁通電路供至場效電晶體Q的閘極，導通場效電 晶體Q。又由於若打開開關SW’使光電耦合器pc的受光元 件停止發光’受光元件即停止發電，故場效電晶體q切斷。 第3圖顯時此際電路各部的訊號波形，發光元件的陽極 側電壓Vi於開關SW導通時歸零，於切斷時成爲高位準。與 此對應，流至發光元件的電流I於開關s W導通時成爲高位準 ，於切斷時歸零。 並且’發光元件所產生的電壓，亦即供至場效電晶體Q 的閘極的電壓v2於開關SW導通時急遽上昇，於切斷時徐徐 下降。這是作爲受光元件使用的光伏特的電壓變化特性， 於下降緩慢這一點呈現特徵。因此，無需於光電耦合器PC 的輸出側設置延時電路。 並且，在電壓V2達到臨界値之前場效電晶體Q導通，— 超過臨界値即切斷。其顯示爲場效電晶體Q的源極電壓V3。 第4圖是顯示第2圖及第3圖所說明的光電耦合器PC的動 作原理下第1圖電路各部的電壓、電流波形的圖面。 首先，第1圖的整流器11的輸出端電壓即制動器電壓a 是交流半波整流電壓波形，於電動機通電期間內爲定電壓 ，藉由通電停止產生極性相反的電壓。另一方面，流至變 流器CT的1次側的電動機電流m固然於電動機起動時成爲大 電流’不過，此後減少而成爲定電流，藉由電動機停止歸 零。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an excitation control device for a non-excited actuation brake. [Prior Art] In general, a motor having an electromagnetic brake, which is known as a brake motor, is braked by a power supply, that is, by a non-excitation, and the brake is actuated to perform a rapid stop. The first diagram is a combination of a non-excitation-actuated DC brake in the configuration of an AC motor, which is powered by an electromagnetic contactor MC that is inserted into a feed circuit that supplies an AC motor, and supplies power to the motor, and is in the motor. When power is supplied, the output rectified by the diodes and D2 connected between the motor Μ and the electromagnetic contactor MC is supplied to the brake Β, and the brake is not actuated. When the power supply to the motor is stopped, the brake is actuated. Becomes non-excited. The first diagram is a configuration in which the rectifier circuit formed by the diodes Eh and 02 is connected to the power supply side of the electromagnetic contactor MC, and the auxiliary contact of the electromagnetic contactor MC is inserted between the diode and the brake. In Fig. 11, the auxiliary relay RX is provided in the diode rectifier circuit of Fig. 9, and its contact is inserted between the diodes D, 02 and the brake B. SUMMARY OF THE INVENTION (Problems to be Solved by the Invention) Each of the circuits of the above-described Fig. 9 to Fig. 1 has the following disadvantages. -4 - (2) (2) 1324438 The electromagnetic contactor MC of the circuit of Fig. 9 is turned on when the motor is stopped. The electromagnetic energy of the coil accumulated so far in the brake B is the circulating current as indicated by the arrow in the figure. The flow of the form continues to temporarily excite the state. This will result in the brake lag of the brakes that occur. Further, during the period in which the brake is not actuated, the motor generates a residual magnetic power generation function, and since the current flows into the brake via the diodes D] and D2, the excitation state is further maintained. Since the figure is shown in Fig. 10, the diode Since Di, 02 and brake B are disconnected by the contact of the electromagnetic contactor MC, this serves as a countermeasure against the operation time lag of the brake. However, the circuit configuration is complicated, and when the distance between the electromagnetic contactor MC and the motor is too long, the cost of additional wiring wires and the construction cost are required. Since the AC relay RX is used in Fig. 11, the recovery time of the contact is short. Therefore, although the performance is higher than that of the device of Fig. 10, the operation time is uncertain due to an error in the contact recovery time. Moreover, since there is a contact circuit, there is a problem that the life is short or it is easily affected by the surrounding gas. The 12th and 12th drawings show two examples of the brake control device for the conventional contactless brake motor that takes measures against this inconvenience. The first block diagram is a voltage detecting type circuit, and the second is a current detecting type circuit. Further, the circuit shown in Fig. 10 is a circuit for stopping the voltage of the motor 一, that is, a circuit for actuating the brake ,, which uses a one-shot constant harmonic oscillator ΜΜ 'extends the time for energizing the brake, and stabilizes via the field effect transistor Q The construction of the power supply to the brake Β. Further, the terminal 1-4 is connected, for example, to the terminal 4 of the actuator excitation circuit in Fig. 1 to energize the brake β. (3) (3) 1324438 In addition, the circuit shown in Fig. 10B is a circuit that stops the current supplied to the motor ', that is, the circuit that operates the brake, which detects the current by the converter CT, stabilizes via the optocoupler PC and the field effect. The configuration of the power supply of the transistor Q to the brake port. Further, for example, the terminal 1-6 of the brake exciting circuit in Fig. 9 is connected to energize the brake Β. By using these brake energizing circuits, the brake excitation circuit of the brake motor becomes more stable than the contact circuit. On the other hand, the possibility of simplifying the circuit configuration is reviewed, and a simple circuit configuration is further sought. On the other hand, Fig. 13 is a power supply measurement in which the rectifier circuit composed of the diodes 0! and 02 is connected to the electromagnetic contactor MC, and the auxiliary contact of the electromagnetic contactor MC is inserted between the diode and the brake. Device. Since the circuit shown in Fig. 13 is disconnected between the diodes D] and 02 and the brake 借 by the contact of the electromagnetic contactor MC, it becomes a countermeasure against the problem that the brake actuation time lags. However, when the circuit configuration is complicated and the distance between the electromagnetic contactor MC and the motor is too long, the cost of additional wiring wires and the construction cost are required. Further, the drive control circuit for the motor turns is a circuit using a current transformer as shown in Fig. 14. It is to insert the converter IN V between the electromagnetic contactor MC] and the motor , to perform soft start and soft stop when the motor starts and stops. This circuit reduces the converter IN V at the time of starting and stopping. Output = so the brake B cannot be actuated by the output of the converter IN V . Therefore, the power supply of the (4) (4) 1324438 actuator B is diverged from the power supply side of the converter IN V, and in order to feed control the brake, the relay RY that operates with the operation of the converter IN V is provided. Magnetic contactor MC2. As a result, the circuit configuration attached to the converter IN V becomes quite complicated. SUMMARY OF THE INVENTION The present invention has been made in view of the above-described points, and an object thereof is to provide an excitation control device for a non-excited actuated brake having stable operation and simple circuit configuration. In order to achieve the above object, the present invention provides an excitation control device for a non-excitation actuated brake, which is mounted on the motor when the power is turned off as the power of the AC motor is turned on and off by the electromagnetic contactor. Non-excited active electromagnetic brake. Further, when the power source is turned on, the excitation control device for the non-excitation type brake of the brake is released, and a signal forming circuit for detecting the energization state of the motor to form a rectified signal is provided, and the light-emitting element and the power-generating light-receiving element are themselves An optocoupler having a slow output falling characteristic, providing an output of the signal forming circuit, a signal coupler for photoelectrically transmitting and receiving signals, and an output signal for supplying the signal coupler between the power source and the brake That is, the switching circuit that feeds the electromagnetic brake from the aforementioned power source; and the excitation control device of the non-excited actuation type brake, which is cut off at the power source with the power supply of the alternating current motor made by the electromagnetic contactor When the vehicle is off, the excitation-free electromagnetic brake (5) (5) 1324438 that is mounted on the motor is activated, and the excitation control device of the non-excited brake of the brake is released when the power is turned on. a current detecting means for detecting an energizing current of the motor, The light-emitting means for forming the illuminating signal by the output of the current detecting means, the light-receiving means for receiving the illuminating signal from the illuminating means, and the switching element, when the light-receiving means receives the illuminating signal, turning on the switching element, and supplying the brake releasing current The brake energizing circuit of the aforementioned brake. [Embodiment] Embodiments of the Invention Fig. 1 is a circuit diagram showing a circuit configuration of an embodiment of the present invention. This circuit is a structure for detecting a motor based on the circuit shown in FIG. 10B for a conventional circuit. If the current is zero, that is, a circuit for actuating the brake, the circuit is as described in FIG. 10B, respectively. 1 to 6 are connected to the respective terminals 1 to 6 in Fig. 9 for use. The terminals 1 and 2 are supplied with the phase voltage of the motor ,, the terminal 3' 4 is connected to the terminal of the brake ,, and the terminals 5 and 6 are connected to the current detecting converter CT of the motor Μ. The voltage of the motor turns supplied from the terminals 1, 2 is half-wave rectified by the rectifier 11, and supplied to the brake Β shown in the figure via the terminals 3, 4. The field effect transistor 15 as a switching element is inserted between the terminal 2 and the terminal 4, and the field effect transistor 15 is turned on and off by the current detecting signal of the motor. In order to detect the current of the motor ,, the detection current of the converter CT is rectified by the wave rectifying circuit 2, and is supplied to the photodiode of the photocoupler as a signal coupler -8-(6) (6) 1324438 ]3 body. The full-wave rectifier circuit 12 has a bridge rectifier circuit and a constant voltage diode, and supplies a constant voltage to the light-emitting diode. The photocoupler 13 is a photovoltaic (product name) type. Since the light-receiving element of the photovoltaic-type photocoupler has power generation, it does not require a power source, and the output rises rapidly when the light is received, and the output decreases slowly when the light is stopped. Characteristics. With regard to the power generation property, by using the photovoltaic specific light-receiving element, the circuit of Fig. 1 is not required to be a diode of the element of the photoelectric coupling device of the photocoupler PC. One, one electrolytic capacitor, one Zener diode, and the circuit is simplified. Even in the case where the light-emitting element from the photocoupler is supplied with intermittent light, if the intermittent interval is small to some extent, The output of the light receiving element is still continuous. Therefore, there is no need for a time constant circuit which is required in the case of using a general light-receiving diode or a photovoltaic transistor as the light-receiving element. That is, the light-receiving element must be connected in series to form a desired voltage. However, a CR circuit as a delay circuit is not required, and the output of the light-receiving element is supplied to the gate of the field effect transistor 15 via the resistors 14a and 4b. The resistor 14b connected in series to the gate of the field effect transistor Q may also be omitted. Therefore, the simplification of the circuit can be understood by the reduction in the number of parts. 2 and 3 are diagrams showing the photocoupler PC in the circuit of Fig. 1, the field effect transistor Q in response to the output of the photocoupler PC, and the circuit of the terminal 4, and the signals of the various parts of the circuit. The surface of the waveform. The circuit shown in Fig. 2 supplies a voltage V1 to the light-emitting element of the photocoupler PC via the switch SW, and flows out the current 1. Accordingly, the light-receiving element generates a voltage, and -9-(7)(7)1324438 is supplied to the gate of the field effect transistor Q via the resistor bypass circuit to turn on the field effect transistor Q. Further, when the switch SW' is turned on, the light-receiving element of the photocoupler pc stops emitting light, and the light-receiving element stops power generation, so that the field effect transistor q is turned off. Fig. 3 shows the signal waveform of each part of the circuit, and the anode side voltage Vi of the light-emitting element is reset to zero when the switch SW is turned on, and becomes a high level when it is turned off. Corresponding to this, the current I flowing to the light-emitting element becomes a high level when the switch s W is turned on, and returns to zero when it is turned off. Further, the voltage generated by the light-emitting element, that is, the voltage v2 supplied to the gate of the field effect transistor Q rises sharply when the switch SW is turned on, and gradually drops when it is turned off. This is a characteristic characteristic of the photovoltaic voltage used as a light-receiving element, and is characterized by a slow drop. Therefore, it is not necessary to provide a delay circuit on the output side of the photocoupler PC. Moreover, the field effect transistor Q is turned on before the voltage V2 reaches the critical threshold, and is cut off when the threshold is exceeded. It is shown as the source voltage V3 of the field effect transistor Q. Fig. 4 is a view showing voltage and current waveforms of respective portions of the circuit of Fig. 1 in the principle of operation of the photocoupler PC explained in Figs. 2 and 3. First, the output voltage of the rectifier 11 of Fig. 1, that is, the brake voltage a is an AC half-wave rectified voltage waveform, which is a constant voltage during the energization of the motor, and generates a voltage of opposite polarity by energization stop. On the other hand, the motor current m flowing to the primary side of the converter CT is a large current when the motor is started. However, it is reduced to become a constant current, and the motor is stopped to return to zero.
此變流器CT的2次測輸出b是對應電動機電流m的輸出， 其藉整流器整流，成爲整流器輸出c，供至光電耦合器PC -10 - (8) (8)1324438 的發光元件。隨此，於光電耦合器PC的受光元件（光伏特 )產生光伏特輸出d。如藉第3圖於前面所說明，此光伏特 輸出d具有上升快速，下降緩慢的特性。 藉此，如第1圖所示，於光電耦合器P C的輸出側與場 效電晶體Q之間不設置延時電路或延時元件，只不過設置 電阻14a' 14b (電阻14a可省略）。並且由於光伏特具有 發電性，故不必與電源連接，連接於場效電晶體Q的閘極 即足夠。 第5圖是顯示制動電動機停止時第4圖所示第1圖電路 各部的電壓、電流及訊號的波形的圖面，符合3至e分別與 第4圖對應。 並且，第6圖是同樣地顯示制動電動機起動時第4圖所 示第1圖電路各部的電壓、電流及訊號的波形的圖面。 第7圖是顯示本發明一實施例的電路構造的圖面。其 中.於相同符號附以（），標示第〗圖與第2圖共用的元件 。於第7圖中，一點鏈線圍繞的部份構成包含具有制動器 的電動機的組件，其連接於通斷電動機的電磁接觸器MC 的2次側來使用。亦即，於此組件設置電動機電源端子U 、V、W以及電路電源端子U、W，若進行此連接，組件即 可動作。 於組件中，無勵磁作動型制動器乃機械式連接於電動 機，於電動機Μ的驅動動作中，對制動器B勵磁，使其處 於不作動狀態。並且，於停止對電動Μ的供電時，停止制 動器Β的通電=藉制動器Β的作動力停止電動機Μ。 -11 - (9) (9)1324438 制動器B的通電及其停止藉由通斷作爲開關元件的場 效電晶體FET ( 15 )來進行。場效電晶體FET ( 15 )的通 斷藉由以變流器CT檢測有無流至電動機Μ的通電電流，一 根據檢出的輸出作動光電耦合器ΡΗ(13)，即隨著此光電 耦合器PH ( 1 3 )的作動通斷場效電晶體FET ( 1 5 )來進行 〇 光電耦合器PH ( 1 3 )由於在發光側反相並聯連接2個 發光二極體LED，故若自變流器CT提供交流電、二發光二 極體LED即交替發光，將此產生的光供至受光電晶體PT。 藉此，將對應於流經變流器C T的交流電的全波整流訊號 的光供至受光電晶體PT。並且，受光電晶體PT使場效電 晶體FET ( 1 5 )成導通狀態，並使制動器B通電。 形成二個二極體Di' D2'電阻R!、電解電容器C及齊 納二極體ZD所構成的定電壓電源電路，作爲制動器B利 用場效電晶體FET (] 5 )的開關的作動電源，此電壓電源 電路的輸出經由光電耦合器PH ( 13)的受光電晶體ρτ供 至場效電晶體（〗3 )。 光電耦合器PH(〗3)的受光電晶體PT —隨著連接於 變流器的二次電路的光電耦合器PH(]3)的發光二極體 LED所發出光訊號作動，電壓訊號即供至場效電晶體FET (1 5 )的閘極而導通。場效電晶體FET ( 1 5 )具有爲連接 於此閘極的電阻R2以及本身所具有閘電容Cg決定的時間常 數，根據此時間常數進行通斷動作，若此電容Cg充份，即 可附加適當電容的電容器。 -12- (10) (10)1324438 且，於第7圖的電路中，VZ!、VZ2是用來保護用於電 路的各元件免於高電壓的過壓保護器。 第8A至第8D圖顯示第7圖電路中各部的電壓及電波波 形。並且，第8A至8B圖是電動機Μ的電壓及電流。電磁接 觸器MC-導通，電動機電壓即上升而保持恆定値，電磁接 觸器MC-切斷，電動機電壓即緩慢下降。另一方面，電磁 接觸器MC-導通，電動機電流即在急遽增加後平穩保持於 一定値，電磁接觸器MC-切斷，電動機電流即馬上下降》 對此，第8C至第8D圖顯示制動器Β的電流及電壓。制 動器Β的電流藉由電磁接觸器MC的導通緩慢上升，並藉由 電磁接觸器MC的切斷立刻下降。並且，制動器Β的電壓藉 由電磁接觸器MC的導通略微緩慢或快速上升，藉由電磁 接觸器MC的切斷，隨著脈衝狀電壓下降。 (變形例） 上述實施例固然根據電動機電流的通斷控制制動器的 通斷，不過亦可爲根據電動機電壓的構造。 上述實施例的光電耦合器ΡΗ、場效電晶體FET等半導 體元件可換成實現相同功能的其他元件。 發明效果 由於本發明如上述，使用具有上升快速，下降緩慢的 特性者於取出電動機通電狀態的光電耦合器，藉由此光電 耦合器的輸出，於制動電動機中的電動機驅動時切斷制動 -13- (11) (11)1324438 器’ 一切斷電動機即導通制動器，故無需設置將光電稱合 器的輸出延時的元件，可形成簡單的電路構造。 又由於本發明如上述’檢測具有制動器的電動機的電 動機電流，供至光電耦合器，作動開關元件，故如習知， 不使用電磁接觸器的輔助接點，又即使使用變流器於電 動機的電源，仍無需自電動機分歧的制動器用電源，構造 既簡單，且可實現動作穩定的制動器動作。 【圖式簡單說明】 第1圖是顯示本發明一實施例的電路圖。 第2圖是顯示與第1圖電路中的光電耦器有關的電路部 份的電路圖。 第3圖是顯示第2圖電路各部中的電壓、電流的波形的 圖面。 第4圖是顯示第1圖電路各部中的電壓、電流及信號的 圖面。 第5圖是放大顯示第4圖所示波形的時間軸的波形圖， 是制動器停止時的波形圖。 第6圖是放大顯示第4圖所示波形的時間軸的波形圖， 是制動器起動時的波形圖。 第7圖是顯示本發明一實施例的構造的說明圖。 第8圖是顯示第7圖電路中電動機Μ的電壓、電流以及 制動器Β的電流、電壓的變化情形的時序圖。 第9圖是顯示具有習知電流作動型制動器的制動電動 -14 - (12) (12)1324438 機的配線的電路圖。 第1 0圖是顯示具有習知輔助接點作動型制動器的制動 電動機的配線的電路圖。 第11圖是顯示具有習知電壓作動型制動器的制動電動 機的配線的電路圖。 第1 2 A圖是顯示習知無接點式電壓作動型制動器的作 動電路的圖面’第1 2B圖是顯示如同習知無接點式的電流制 動型制動器的作動電路的圖面。 第1 3圖是使用習知具有輔助接點的電磁接觸器的制動 電動機的配線圖。 第1 4圖是以習知變流器作爲電動機電源的制動電動機 的電源系統圖。 主要元件對照表 1、2'3、4、5、6 端子 Π 整流器 I 2全波整流電路 13、（13) 'PC光電耦合器 1 4 a、1 4 b 電阻 1 5 > Q ' FET (15) 場效電晶體 B制動器 CT變流器 Cg閘電容 G閘極 -15- (13) (13)1324438 LED發光二極體 Μ電動機 MC電磁接觸器 P T受光電晶體 SW 開關 V 1、V 2、V 3 電壓 VZ,、vz2過壓保護器The secondary measurement output b of this converter CT is an output corresponding to the motor current m, which is rectified by a rectifier to become a rectifier output c, which is supplied to the light-emitting elements of the photocoupler PC -10 - (8) (8) 1324438. Accordingly, a photovoltaic output d is generated at the light-receiving element (photovoltaic) of the photocoupler PC. As explained above in Fig. 3, this photovoltaic output d has a characteristic of rapid rise and slow fall. Thereby, as shown in Fig. 1, no delay circuit or delay element is provided between the output side of the photocoupler P C and the field effect transistor Q, except that the resistors 14a' 14b are provided (the resistor 14a can be omitted). Moreover, since the photovoltaic is particularly power-generating, it is not necessary to be connected to the power source, and it is sufficient to connect the gate of the field effect transistor Q. Fig. 5 is a view showing waveforms of voltages, currents, and signals of respective portions of the circuit of Fig. 1 shown in Fig. 4 when the brake motor is stopped, and corresponds to Figs. 4 to 3, respectively. Further, Fig. 6 is a view similarly showing waveforms of voltages, currents, and signals of respective portions of the circuit of Fig. 1 shown in Fig. 4 at the time of starting the brake motor. Fig. 7 is a view showing the circuit configuration of an embodiment of the present invention. In the same symbol, the same symbol is attached to (), and the component shared by the first image and the second image is indicated. In Fig. 7, the portion surrounded by the one-point chain constitutes an assembly including a motor having a brake which is connected to the secondary side of the electromagnetic contactor MC of the on-off motor. That is, the motor power terminals U, V, W and the circuit power terminals U, W are provided for this component, and if this connection is made, the components can be operated. In the assembly, the non-excitation actuator brake is mechanically coupled to the motor, and the brake B is excited during the driving operation of the motor to be in a non-actuated state. When the power supply to the electric cymbal is stopped, the energization of the brake Β is stopped. = The brake Β is used to stop the motor Μ. -11 - (9) (9) 1324438 The energization of the brake B and its stop are performed by switching on and off the field effect transistor FET (15) as a switching element. The on-off of the field effect transistor FET (15) is operated by the converter CT to detect the presence or absence of an energization current flowing to the motor, and the photocoupler 13(13) is activated according to the detected output, that is, with the photocoupler The PH (1 3 ) is actuated to turn on the field effect transistor FET ( 15 ) to perform the 〇 optocoupler PH ( 1 3 ). Since the two LEDs are connected in parallel on the illuminating side, the self-converting current is self-converted. The device CT provides alternating current, two-light diode LEDs, that is, alternating light, and the generated light is supplied to the photo-acceptor crystal PT. Thereby, the light corresponding to the full-wave rectified signal of the alternating current flowing through the converter C T is supplied to the photoreceptor crystal PT. Further, the field effect transistor FET (15) is turned on by the phototransistor PT, and the brake B is energized. Forming a constant voltage power supply circuit composed of two diodes Di' D2' resistor R!, electrolytic capacitor C, and Zener diode ZD, and acting as a brake B using a switch of a field effect transistor FET () 5 ) The output of this voltage supply circuit is supplied to the field effect transistor (Fig. 3) via the photonic crystal ρτ of the photocoupler PH (13). The photo-electric crystal PT of the photocoupler PH (?3) is actuated by the light-emitting diode emitted by the LED of the photocoupler PH(]3) connected to the secondary circuit of the converter, and the voltage signal is supplied The gate of the field effect transistor FET (1 5 ) is turned on. The field effect transistor FET (15) has a time constant determined by the resistor R2 connected to the gate and the gate capacitance Cg itself. The on/off operation is performed according to the time constant, and if the capacitor Cg is sufficient, it can be added. Capacitor with appropriate capacitance. -12- (10) (10) 1324438 Also, in the circuit of Fig. 7, VZ! and VZ2 are overvoltage protectors for protecting the components for the circuit from high voltage. Fig. 8A to Fig. 8D show voltages and electric wave waveforms of respective portions in the circuit of Fig. 7. Also, Figures 8A to 8B show the voltage and current of the motor Μ. When the electromagnetic contactor MC- is turned on, the motor voltage rises and remains constant, and the electromagnetic contactor MC- is turned off, and the motor voltage is slowly lowered. On the other hand, the electromagnetic contactor MC- is turned on, the motor current is kept steady at a certain level after the sudden increase, the electromagnetic contactor MC- is cut off, and the motor current is immediately dropped. In this regard, the 8C to 8D drawings show the brake Β Current and voltage. The current of the brake turns slowly rises by the conduction of the electromagnetic contactor MC, and is immediately lowered by the cutoff of the electromagnetic contactor MC. Further, the voltage of the brake Β is slightly slowed or rapidly risen by the conduction of the electromagnetic contactor MC, and the pulse voltage is lowered by the cutting of the electromagnetic contactor MC. (Modification) Although the above embodiment controls the opening and closing of the brake in accordance with the on/off of the motor current, it may be a configuration according to the motor voltage. The semiconductor elements such as the photocoupler 场 and the field effect transistor FET of the above embodiment can be replaced with other elements that perform the same function. Advantageous Effects of Invention As described above, according to the present invention, a photocoupler having a characteristic of rapid rise and slow fall is used to take out a state in which a motor is energized, whereby the output of the photocoupler is used to cut off the brake when the motor is driven in the brake motor-13 - (11) (11) 1324438 'A cutting motor is a conduction brake, so there is no need to provide a component that delays the output of the photoelectric coupler, which can form a simple circuit structure. Further, since the present invention detects the motor current of the motor having the brake as described above and supplies it to the photocoupler to actuate the switching element, it is conventionally known that the auxiliary contact of the electromagnetic contactor is not used, and even if the converter is used for the motor The power supply does not require a brake power source that is different from the motor, and the structure is simple and the brake operation can be stabilized. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a circuit diagram showing an embodiment of the present invention. Fig. 2 is a circuit diagram showing a circuit portion related to the photocoupler in the circuit of Fig. 1. Fig. 3 is a view showing a waveform of voltage and current in each part of the circuit of Fig. 2. Figure 4 is a diagram showing the voltage, current, and signal in each part of the circuit of Figure 1. Fig. 5 is a waveform diagram showing the time axis of the waveform shown in Fig. 4 in an enlarged manner, and is a waveform diagram when the brake is stopped. Fig. 6 is a waveform diagram showing the time axis of the waveform shown in Fig. 4 in an enlarged manner, and is a waveform diagram at the time of starting the brake. Fig. 7 is an explanatory view showing the configuration of an embodiment of the present invention. Fig. 8 is a timing chart showing changes in the voltage and current of the motor Μ and the current and voltage of the brake 中 in the circuit of Fig. 7. Fig. 9 is a circuit diagram showing the wiring of the brake electric -14 - (12) (12) 1324438 machine having a conventional current actuated brake. Fig. 10 is a circuit diagram showing the wiring of a brake motor having a conventional auxiliary contact actuation brake. Fig. 11 is a circuit diagram showing the wiring of a brake motor having a conventional voltage-actuated brake. Fig. 1 2A is a view showing an operation circuit of a conventional contactless voltage-actuated brake. Fig. 2B is a view showing an operation circuit of a current brake type brake of a conventional contactless type. Fig. 13 is a wiring diagram of a brake motor using a conventional electromagnetic contactor having an auxiliary contact. Fig. 14 is a power supply system diagram of a brake motor using a conventional converter as a motor power source. Main components comparison table 1, 2'3, 4, 5, 6 terminals 整流 Rectifier I 2 full-wave rectification circuit 13, (13) 'PC photocoupler 1 4 a, 1 4 b resistance 1 5 > Q ' FET ( 15) Field effect transistor B brake CT converter Cg gate capacitance G gate -15- (13) (13) 1324438 LED light emitting diode motor MC electromagnetic contactor PT by photoelectric crystal SW switch V 1 , V 2 , V 3 voltage VZ, vz2 overvoltage protector
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