TWI767545B - Constant frequency energy saving system and method of electric motor - Google Patents
Constant frequency energy saving system and method of electric motor Download PDFInfo
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Abstract
一種電動機之定頻節能系統及方法，主要包括；一控制電路、以及一矽控整流器電路用以驅動一電動機。該矽控整流器電路的輸入端耦接一第一相位交流電源，該矽控整流器電路的輸出端耦接該電動機。該控制電路耦接該矽控整流器電路的觸發端，藉由該控制電路定頻調整觸發該矽控整流器電路，控制啟動該電動機的電流，以達到定頻控制節省啟動電流以及節能之功效。A constant-frequency energy-saving system and method for an electric motor mainly includes a control circuit and a silicon-controlled rectifier circuit for driving a motor. The input end of the silicon-controlled rectifier circuit is coupled to a first-phase alternating current power supply, and the output end of the silicon-controlled rectifier circuit is coupled to the motor. The control circuit is coupled to the trigger terminal of the silicon-controlled rectifier circuit, and triggers the silicon-controlled rectifier circuit by adjusting the frequency of the control circuit to control the current for starting the motor, so as to achieve the effects of saving starting current and energy by the constant-frequency control.
Description
本發明係有關電動機節能啟動的技術領域，尤指一種電動機之定頻節能系統及方法。 The invention relates to the technical field of energy-saving starting of electric motors, in particular to a constant-frequency energy-saving system and method for electric motors.
一般電動機，例如馬達設備、壓縮機等，應用十分廣泛，例如烘乾機械、塑膠押出機械、倉品機械、粉末治金、電線電纜機械、UV、IR乾燥機、金屬熱處理、塑膠皮革貼合、纖維染色加溫設備、物理化學儀器等。然而，一般電動機，例如單相馬達，需要大電容換相，才能啟動，且啟動需要大電流，相對耗電量很高，必須想辦法有效控制節能省電，相同的三相馬達亦類似。 General motors, such as motor equipment, compressors, etc., are widely used, such as drying machinery, plastic extrusion machinery, warehouse machinery, powder metallurgy, wire and cable machinery, UV, IR dryer, metal heat treatment, plastic leather lamination, fiber Dyeing heating equipment, physical and chemical equipment, etc. However, general motors, such as single-phase motors, require large capacitor commutation to start, and start-up requires a large current, and the relative power consumption is very high. It is necessary to find ways to effectively control energy saving and power saving, and the same three-phase motor is similar.
另外，為了避免萬一供電負載輸出變化，使電動機產生過載燒毀，一般都會選用比實際運用更大規格的電動機，譬如原來只需20馬力的會選用30馬力的電動機，如此雖然可確保運轉時符合安全使用，但卻會產生虛功耗費能源的缺點。 In addition, in order to prevent the motor from overloading and burning due to the change of the power supply load output, a motor with a larger specification than the actual use is generally used. It is safe to use, but it will have the disadvantage of virtual power consumption and energy consumption.
故有需要一個馬達驅動與控制的電路模組，以增加馬達運作節能效率。 Therefore, there is a need for a motor drive and control circuit module to increase the energy saving efficiency of the motor operation.
有鑒於此，本發明之主要目的在提供一種電動機之定頻節能系統及方法，主要包括；一控制電路、以及一矽控整流器電路用以驅動一電動機。該矽控整流器電路的輸入端耦接一第一相位交流電源，該矽控整流器電路的輸出端耦接該電動機。該控制電路耦接該矽控整流器電路的觸發端，藉由該控制電路定頻調整觸發該矽控整流器電路，控制啟動該電動機的電流，以達到定頻控制節省啟動電流以及節能之功效。 In view of this, the main purpose of the present invention is to provide a constant-frequency energy-saving system and method for a motor, which mainly includes a control circuit and a silicon-controlled rectifier circuit for driving a motor. The input end of the silicon-controlled rectifier circuit is coupled to a first-phase alternating current power supply, and the output end of the silicon-controlled rectifier circuit is coupled to the motor. The control circuit is coupled to the trigger terminal of the silicon-controlled rectifier circuit, and the silicon-controlled rectifier circuit is triggered by the control circuit to adjust the frequency to control the current for starting the motor, so as to achieve the effects of saving starting current and energy by the constant-frequency control.
較佳實施，其中該電動機之定頻節能系統，主要包括；一控制電路以控制一矽控整流器電路以驅動一三相電動機，其具有一第一輸入端、一第二輸入端以及一第三輸入端，該第一輸入端耦接一第二相位交流電源； 該矽控整流器電路：包括一第一矽控整流器及一第二矽控整流器，該每一矽控整流器具有一輸入端、一觸發端以及一輸出端，其中該第一矽控整流器的輸入端耦接一第一相位交流電源，該第一矽控整流器的輸出端耦接該三相電動機；該第二矽控整流器的輸入端耦接一第三相位交流電源，該第二矽控整流器的輸出端耦接該三相電動機的第三輸入端，該第一、第二矽控整流器的觸發端耦接該控制電路； 該控制電路為一16位元微處理器：耦接控制該矽控整流器電路的觸發端，藉由定頻調整觸發該矽控整流器電路，控制啟動該三相電動機的電流，以達到定頻控制節省啟動電流以及節能之功效。 In a preferred implementation, the fixed-frequency energy-saving system for the motor mainly includes; a control circuit to control a silicon-controlled rectifier circuit to drive a three-phase motor, which has a first input end, a second input end and a third an input end, the first input end is coupled to a second-phase AC power supply; The silicon-controlled rectifier circuit includes a first silicon-controlled rectifier and a second silicon-controlled rectifier, each silicon-controlled rectifier has an input terminal, a trigger terminal and an output terminal, wherein the input terminal of the first silicon-controlled rectifier has A first-phase AC power supply is coupled, the output end of the first silicon-controlled rectifier is coupled to the three-phase motor; the input end of the second silicon-controlled rectifier is coupled to a third-phase AC power supply, and the second silicon-controlled rectifier is The output end is coupled to the third input end of the three-phase motor, and the trigger ends of the first and second silicon-controlled rectifiers are coupled to the control circuit; The control circuit is a 16-bit microprocessor: coupled to the trigger terminal of the silicon-controlled rectifier circuit, triggering the silicon-controlled rectifier circuit through constant frequency adjustment, and controlling the current that starts the three-phase motor to achieve constant frequency control Save starting current and save energy.
較佳實施，其中該16位元微處理器進一步耦接設有一三相電壓電流偵測單元、一三相頻率偵測裝置、一三相相位偵測單元、一三相 電子溫度偵測裝置、一通訊模組、一電扇、一電源供應模組、一顯示驅動模組、一保險絲裝置。 A preferred implementation, wherein the 16-bit microprocessor is further coupled with a three-phase voltage and current detection unit, a three-phase frequency detection device, a three-phase phase detection unit, a three-phase An electronic temperature detection device, a communication module, an electric fan, a power supply module, a display drive module, and a fuse device.
較佳實施，其中該三相交流電連接該三相電動機的二次供電側上設有三個比流器(current transformer)，以便該三相電壓電流偵測單元、該三相頻率偵測裝置，及該三相相位偵測單元執行檢測。 A preferred implementation, wherein the three-phase alternating current is connected to the secondary power supply side of the three-phase motor with three current transformers, so that the three-phase voltage and current detection unit, the three-phase frequency detection device, and The three-phase phase detection unit performs detection.
較佳實施，該16位元微處理器進一步耦接設有一防盜編碼單元，以防止系統資料被侵入盜取；一安全跳脫單元，當發現偵測異常時，讓三相電動機執行安全跳脫。 In a preferred implementation, the 16-bit microprocessor is further coupled with an anti-theft coding unit to prevent system data from being intruded and stolen; a safety trip unit, which allows the three-phase motor to perform a safety trip when an abnormality is detected. .
本發明一種電動機之定頻節能系統及方法的精神在於，利用一控制電路、以及一矽控整流器電路用以驅動一電動機。藉由定頻調整觸發該矽控整流器電路，控制啟動該電動機的電流。另外，本發明的一實施例使用微處理晶片作為控制電路，同時搭配多個偵測單元，能夠隨時監控環境變化以及電動機操作狀況，以達到及時保護電動機設備。在電動機正常運轉且所有檢測正常時，自動開始計算執行定頻切割觸發導通，以定頻控制驅動一般選用較大安全規格之電動機可正常運作，同時又能達到節省啟動電流以及節能之功效。 The spirit of a constant-frequency energy-saving system and method for a motor of the present invention is to use a control circuit and a silicon-controlled rectifier circuit to drive a motor. Trigger the silicon-controlled rectifier circuit by adjusting the fixed frequency to control the current that starts the motor. In addition, an embodiment of the present invention uses a micro-processing chip as a control circuit, and is equipped with a plurality of detection units to monitor environmental changes and motor operating conditions at any time, so as to protect the motor equipment in time. When the motor is running normally and all the detections are normal, it will automatically start to calculate and execute the constant frequency cutting to trigger the conduction. Generally, the motor with a larger safety specification is selected for the fixed frequency control drive to operate normally, and at the same time, it can save the starting current and save energy.
10:電動機 10: Motor
11:控制電路 11: Control circuit
12:矽控整流器電路 12: Silicon Controlled Rectifier Circuit
20:三相電動機 20: Three-phase motor
201、202、203:比流器 201, 202, 203: Comparator
21:控制電路 21: Control circuit
22:矽控整流器電路 22: Silicon Controlled Rectifier Circuit
221:矽控整流器 221: Silicon Controlled Rectifier
222:矽控整流器 222: Silicon Controlled Rectifier
301:16位元微處理器 301: 16-bit Microprocessor
302:矽控整流單元 302: Silicon controlled rectifier unit
303:三相電壓電流偵測單元 303: Three-phase voltage and current detection unit
304:三相頻率偵測裝置 304: Three-phase frequency detection device
305:三相相位偵測單元 305: Three-phase phase detection unit
306:電子溫度偵測裝置 306: Electronic temperature detection device
307:電源供應模組 307: Power Supply Module
308:顯示驅動模組 308: Display driver module
309:通訊模組 309: Communication module
310:電扇 310: Fan
311:保險絲裝置 311: Fuse device
320:防盜編碼單元 320: Anti-theft coding unit
330:安全跳脫單元 330: Safety trip unit
S10~S17、S21~S25、S31~S33、S41~S43S51~S53、S61~S64、S71:方法步驟 S10~S17, S21~S25, S31~S33, S41~S43, S51~S53, S61~S64, S71: method steps
第1圖 為本發明一較佳實施例電動機之定頻節能系統的電路圖。 Fig. 1 is a circuit diagram of a fixed-frequency energy-saving system for a motor according to a preferred embodiment of the present invention.
第2圖 為本發明另一較佳實施例電動機之定頻節能系統的電路圖。 Fig. 2 is a circuit diagram of a fixed-frequency energy-saving system for a motor according to another preferred embodiment of the present invention.
第3圖 為本發明三相定頻切割的波形圖。 Fig. 3 is the waveform diagram of the three-phase fixed frequency cutting of the present invention.
第4圖 為本發明一較佳實施例電動機之定頻節能系統的電路方塊圖。 FIG. 4 is a circuit block diagram of a fixed-frequency energy-saving system for a motor according to a preferred embodiment of the present invention.
第5圖 為本發明電動機之定頻節能系統的實際電路板配置圖。 Fig. 5 is the actual circuit board configuration diagram of the fixed frequency energy saving system of the motor of the present invention.
第6圖 為本發明一較佳實施例的應用流程圖。 FIG. 6 is an application flow chart of a preferred embodiment of the present invention.
為方便了解本發明之內容，及所能達成之功效，茲配合圖式列舉具體實施例，詳細說明如下：請參第1圖所示，為本發明一較佳實施例電動機之定頻節能系統的電路圖，本發明所設之一種電動機之定頻節能系統，主要包括；一控制電路11、以及一矽控整流器電路12用以驅動一電動機10。在此實施例是以單相馬達做舉例。該矽控整流器電路12包括一輸入端、一觸發端以及一輸出端，其中該矽控整流器電路12的輸入端耦接一第一相位交流電源AC，該矽控整流器電路12的輸出端耦接電動機10。該控制電路11耦接該矽控整流器電路12的觸發端，藉由該控制電路11定頻調整觸發該矽控整流器電路12，控制啟動該電動機10的電流，使能用定頻控制驅動一般選用較大安全規格之電動機10可以正常運轉，同時又可達到節省啟動電流以及節能之功效。
In order to facilitate the understanding of the content of the present invention and the effects that can be achieved, specific embodiments are listed in conjunction with the drawings, and the detailed description is as follows: Please refer to FIG. As shown in the circuit diagram, a fixed-frequency energy-saving system for a motor provided by the present invention mainly includes a
請參考第2圖為本發明另一較佳實施例電動機之定頻節能系統的電路圖。此電動機之定頻節能系統主要包括一控制電路21、以及一矽控整流器電路22用以驅動一三相電動機20，在此實施例該三相電動機20是以三相馬達做舉例。
Please refer to FIG. 2 , which is a circuit diagram of a fixed-frequency energy-saving system for a motor according to another preferred embodiment of the present invention. The fixed-frequency energy-saving system for the motor mainly includes a
該三相電動機20具有一第一輸入端、一第二輸入端以及一第三輸入端，其中該第一輸入端耦接一第二相位交流電源；該矽控整流器電路22包括一第一矽控整流器221、一第二矽控整流器222，該每一矽控整流器221或222各具有一輸入端、一觸發端以及一輸出端，其中第一矽控整流器221的輸入端耦接一第一相位交流電源，該第一矽控整流器的輸出端耦接該三相電動機20；該第二矽控整流器222的輸入端耦接一第三相位交流電源，該第二矽控整流器222的輸出端耦接該三相電動機20的第三輸入端，該第一、第二矽控整流器221、222的觸發端耦接該控制電路22；同樣地，如第2圖及第3圖所示，藉由該控制電路21定頻調整觸發該矽控整流器電路22，控制啟動該三相電動機20的電流，使能用定頻控制驅動一般選用較大安全規格之三相電動機20可以正常運轉，同時又可達到節省啟動電流以及節能之功效。
The three-
上述定頻調整觸發的功能可有效控制驅動一般選用較大安全規格之馬達的啟動。同時，也能夠防止，主要的電源或輸入信號異常時，大電流對馬達的損壞。另外，本實施例提出的控制電路21，可以由依照客戶的需求或是馬達的效能，變更調整觸發啟動的時間。
The above-mentioned fixed frequency adjustment trigger function can effectively control the starting of motors with larger safety specifications. At the same time, it can also prevent the motor from being damaged by a large current when the main power supply or input signal is abnormal. In addition, the
請參考第4圖及第5圖，第4圖為本發明一較佳實施例電動機之定頻節能系統的電路方塊圖。第5圖為本發明電動機之定頻節能系統的實際電路板配置圖。在上述實施例中，電動機之定頻節能系統的控制電路21是使用一16位元的微處理晶片來實現。同時，微處理晶片內例如使用PID控制模組，來達到高效率且高穩定度的控制模式。
Please refer to FIG. 4 and FIG. 5. FIG. 4 is a circuit block diagram of a fixed-frequency energy-saving system for a motor according to a preferred embodiment of the present invention. Fig. 5 is an actual circuit board configuration diagram of the fixed-frequency energy-saving system of the motor of the present invention. In the above-mentioned embodiment, the
其中該16位元微處理器301是使用PID進行控制，而且該16位元微處理器301進一步耦接設有多個偵測單元300。該多個偵測單元300用以偵測三相電動機20的狀態，並回傳所偵測的訊號給16位元微處理器301。上述多個偵測單元300包括三相電壓電流偵測單元303、三相頻率偵測裝置304、三相相位偵測單元305以及電子溫度偵測裝置306。另外，16位元微處理器301還耦接至電源供應模組307、顯示驅動模組308、通訊模組309、電扇310以及保險絲裝置311。
The 16-
較佳實施，如第2圖所示，其中該三相交流電的二次供電側上設有三個比流器201、202、203，以便該三相電壓電流偵測單元303、該三相頻率偵測裝置304，及該三相相位偵測單元305執行檢測。
In a preferred implementation, as shown in FIG. 2, there are three
較佳實施，該16位元微處理器301進一步耦接設有一防盜編碼單元320，以防止系統資料被侵入盜取；一安全跳脫單元330，當發現偵測異常時，讓三相電動機20執行安全跳脫。
In a preferred implementation, the 16-
上述三相電壓電流偵測單元303用以偵測交流電的電壓與電流，三相頻率偵測裝置303用以檢測交流電頻率。本實施例提出的16位元微處理器301具有電壓過高保護的機制，當16位元微處理器301接收到三相電壓電流偵測單元303回傳的電壓值過高時，直接透過控制矽控整流單元302，直接停止輸出電源給馬達。另外，本實施例提出的16位元微處理器301還具有電壓過低的保護機制，當16位元微處理器301接收到三相電壓電流偵測單元303回傳的電壓值過低時，直接透過控制矽控整流單元302，停止輸出電源給馬達。上述16位元微處理器301也可以是透過保險絲裝置311，控制停止輸出電源給馬達。
The three-phase voltage and
同樣地，本實施例提出的16位元微處理器301還具有一電流過高的保護機制，當三相電壓電流偵測單元303回傳的電流值過高一電流門檻值時，直接停止輸出電源給馬達。其中上述電流門檻值的設定大小可以例如是超出15%、35%或50%，停止輸出電源給馬達。
Similarly, the 16-
上述三相頻率偵測裝置304用以檢測交流電頻率。當三相頻率偵測裝置304回傳的頻率值異常時，直接停止輸出電源給馬達。其中微處理器301內可設定頻率超出範圍±5HZ，停止輸出電源給馬達。
The three-phase
上述三相相位偵測單元305耦接至三相電動機20，用以檢測負載端的相位。其中當三相相位偵測單元305偵測出三相欠相時，16位元微處理器301電動機自動停止輸出電源，讓馬達停止運轉。上述微處理器301停止輸出電源的操作，可以例如透過矽控整流單元302，另外，也可以是透過保險絲裝置311直接切斷電源，並點亮顯示燈，以顯示目前的馬達狀況。
The three-phase
電子溫度檢測裝置306配置於三相電動機20，用以檢測三相電動機20的溫度。當電子溫度檢測裝置306回傳的溫度值到達一第一門檻溫度(例如85℃)，16位元微處理器301切斷三相電動機20的電源，以保護三相電動機20。當馬達溫度下降至一第二門檻溫度，16位元微處理器301啟動三相電動機20。其中上述門檻溫度由設計者依據真實操作時的環境設定，本發明並未限定。另外，本發明的三相電動機20的一側配置有一電扇310。16位元微處理器301依據電子溫度檢測裝306置回傳的溫度值，決定電扇310的開關與風速。在本實施例中，16位元微處理器301例如在回傳溫度高於60℃時，啟動電扇310，運轉，當溫度低於50℃時，關閉電
扇310，以自動冷卻馬達溫度，並可避免電扇310長時間運轉，延長電扇壽命。
The electronic
上述16位元微處理器301接收多個偵測單元300回傳的量測數值，並透過上述顯示驅動模組308將馬達目前的操作狀態進行顯示。顯示的方式可以例如是可使用LED或LCD顯示器，分別顯示驅動電壓異常、驅動電流異常交流電頻率，或溫度過高等等的狀態。因此，當馬達運轉遇到故障的狀況時，能夠立即發現，並快速排除。另外，當三相電動機20運轉時，16位元微處理器301透過量測數值，偵測到運作異常或故障情況發生時，16位元微處理器301除了透過顯示驅動模組308發出警示的燈號，16位元微處理器301還可以透過上述通訊模組309的通訊介面，發出一警告訊息(例如是簡訊)給操作或維修人員。再者，16位元微處理器301也可以透過通訊模組309的通訊介面，直接將資料連接至遠端的伺服器、遠端電腦或攜帶裝置。
The 16-
在本實施例一較佳實施例中，上述16位元微處理器301接收多個偵測單元300回傳的量測數值，同時，記錄所接收的多個量測數值。並且，上述16位元微處理器301還可透過上述顯示驅動模組308，於一顯示裝置上直接顯示所接收的量測數值、數值統計曲線、功率曲線以及故障狀態等等。另外，16位元微處理器301透過記錄量測數值，本實施例的16位元微處理器301還可以針對歷史的量測數值進行數值分析，同時，回追故障問題的原因。
In a preferred embodiment of this embodiment, the above-mentioned 16-
在本實施例的一較佳實施例中，馬達負載端的電流將被偵測，並迴授給16位元微處理器301。以16位元微處理器301透過迴授電流，
進行閉迴路PID控制，使16位元微處理器301能夠及時定頻控制馬達運轉，使馬達在不同負載下，及時提高功率值運轉。另外，進行定頻閉迴路控制時，16位元微處理器301也可以是透過偵測負載端的電壓，進行定頻閉迴路PID控制。本實施例的16位元微處理器301也可以透過設定切換為定頻開迴路的PID控制模式或閉迴路的PID控制模式。於開迴路的PID控制模式時，16位元微處理器301根據使用者之調整的目標設定值，定頻控制三相電動機20的運轉。
In a preferred embodiment of this embodiment, the current of the motor load terminal will be detected and fed back to the 16-
請參第3圖至第6圖所示，第6圖為本發明一較佳實施例的應用流程圖。當本發明電動機之定頻節能系統建構完成，以下為定頻節能應用的說明，其中的SCR-是指矽控整流器電路22包括一第一矽控整流器221及一第二矽控整流器222；其中的DI-是指Digital Input數位訊號輸入，由外部AC 220V訊號進入電路，轉成TTL數位訊號，再提供給16位元微處理器301作為DI訊號是否進來的判斷條件；而其中的線性數位資料-是指系統運作已設定好的一堆參數資料，儲存在16位元微處理器301 EEPROM中，和系統按鍵輸入資料及AC 220V外部偵測點DI的統稱；據此，所執行之方法步驟包括：S10將SCR全開，進到S11執行多項安全檢測；S12偵測相位頻率，若異常，跳安全防護，若正常，執行S13；S13偵測馬達迴授，若異常，跳安全防護，若正常，執行S14；S14偵測電壓過低，若異常，跳安全防護，若正常，執行S15；S15偵測電流過高，若異常，跳安全防護，若正常，執行S16；
S16進入第一預備時間，若YES是，到達第一預備時間執行S61啟動SCR矽控整流器電路22進行定頻切割，若NO否，未到達第一預備時間執行S17；S17進入第二預備時間，若YES是，到達第二預備時間執行S71 LCD顯示更新，若NO否，未到達第二預備時間執行以下四種監控包括：S21 DI啟動訊號監控、S31 7節數位顯示監控、S41交流頻率監控、及S51 I/O中斷監控；其中上述步驟S61執行包含：S62線性數位資料轉換讀取，按鍵輸入資料讀取、DI啟動時間偵測，S63 DI啟動時間到，即DI訊號進來，計數時間是否到達，若NO否，回到S11執行多項安全檢測；若YES是，表示三相電動機20已正常啟動運轉，執行S64啟動SCR定頻切割導通，完成後回到S11執行多項安全檢測；其中上述步驟S21 DI啟動訊號監控執行包含：S22 Time0-10ms中斷、S23 DI啟動訊號偵測若YES是，確認有DI啟動訊號，S24開始計數時間再執行S25，若NO否，無偵測到DI訊號，執行S25回讀第一，二預備時間設定值(預儲存在EEPORM的參數值)，完成後回到S11執行多項安全檢測；其中上述步驟S31 7節數位顯示監控依序執行包含：S32 Time2-1ms中斷、S33 7節數位顯示，完成後回到S11執行多項安全檢測；其中上述步驟S41交流頻率監控依序執行包含：S42 Time4-60Hz/180中斷、50Hz/180中斷、S43計算馬達迴授時間、計算相位頻率
時間、SCR全速運轉、計算SCR觸發時間，完成後回到S11執行多項安全檢測；其中上述步驟S51 I/O中斷監控依序執行包含：S52 I/O中斷、S53 R-S-T相位中斷紀錄、馬達R-S-T迴授中斷紀錄，完成後回到S11執行多項安全檢測；藉由，本發明電動機之定頻節能系統及方法，特點可在恆頻、變壓、變流。透過檢測迴路方式控制SCR閘流體，由AI控制系統決定開啟訊號觸發功率開關元件SCR閘流體，並自動偵測負載變化調整三相波形，進而改變電壓與電流輸出，提供設備最適當的輸出，控制電流合理下降，以達到馬達電動機的最佳適電流性，過程完全可採用『全頻智能節能控制』以全轉速運作做為基載需求，自動偵測三相電動機20的負載變化，依實際負載變化，自動運算出最佳化的運轉狀態。以AI智控驅動三相電動機20、即時滿足實際負載所需，故能達到定頻安全平穩的高效節能目的。尤其適用集塵機、魯氏鼓風機、大型熱排電扇、AHU組合式中央空調…等這些必須以定頻定轉速運轉的設備。發明人實際應用上述定頻節能系統於馬達設備，確實可節省約20~28%的電費支出。
Please refer to FIG. 3 to FIG. 6. FIG. 6 is an application flow chart of a preferred embodiment of the present invention. When the construction of the fixed-frequency energy-saving system of the motor of the present invention is completed, the following is the description of the application of fixed-frequency energy-saving, wherein SCR- means that the silicon-controlled rectifier circuit 22 includes a first silicon-controlled rectifier 221 and a second silicon-controlled rectifier 222; wherein The DI- refers to the Digital Input digital signal input, the external AC 220V signal enters the circuit, converts it into a TTL digital signal, and then provides it to the 16-bit microprocessor 301 as the judgment condition for the incoming DI signal; and the linear digital data among them - Refers to a bunch of parameter data that have been set for system operation, stored in the 16-bit microprocessor 301 EEPROM, and the collective name of the system key input data and AC 220V external detection point DI; accordingly, the execution of the method steps Including: S10 fully open the SCR, go to S11 to perform a number of safety tests; S12 detect the phase frequency, if abnormal, skip the safety protection, if it is normal, execute S13; S13 detect the motor feedback, if it is abnormal, skip the safety protection, if it is normal , execute S14; S14 detects that the voltage is too low, if it is abnormal, jump to safety protection, if it is normal, execute S15; S15 detects that the current is too high, if it is abnormal, jump to safety protection, if it is normal, execute S16;
S16 enters the first preparatory time, if YES, when the first preparatory time is reached, execute S61 to start the SCR silicon-controlled rectifier circuit 22 to perform constant frequency cutting; if NO, the first preparatory time is not reached, and execute S17; If YES, execute S71 LCD display update when the second preparation time is reached, if NO, execute the following four types of monitoring before reaching the second preparation time: S21 DI start signal monitoring, S31 7-segment digital display monitoring, S41 AC frequency monitoring, And S51 I/O interrupt monitoring; the execution of the above step S61 includes: S62 linear digital data conversion reading, key input data reading, DI start time detection, S63 DI start time is up, that is, the DI signal comes in, whether the counting time is reached , if NO, go back to S11 to perform a number of safety checks; if YES, it means that the three-phase motor 20 has started to run normally, execute S64 to start the SCR constant frequency cutting and conduction, and return to S11 to execute a number of safety checks after completion; wherein the above step S21 DI start signal monitoring execution includes: S22 Time0-10ms interrupt, S23 DI start signal detection If YES, confirm that there is DI start signal, S24 starts counting time and then execute S25, if NO, no DI signal is detected, execute S25 Read back the first and second preparatory time setting values (parameter values pre-stored in EEPROM), and return to S11 to perform a number of safety checks after completion; wherein the above-mentioned steps S31 7 digital display monitoring are executed in sequence including: S32 Time2-1ms interrupt, S33 7-segment digital display, after completion, go back to S11 to perform a number of safety tests; the above steps S41 AC frequency monitoring are executed in sequence including: S42 Time4-60Hz/180 interruption, 50Hz/180 interruption, S43 Calculate motor feedback time, calculate phase frequency
Time, SCR running at full speed, calculating SCR trigger time, and returning to S11 to perform a number of safety checks after completion; the above steps S51 I/O interrupt monitoring are executed in sequence including: S52 I/O interrupt, S53 R-S-T phase interrupt record, motor R-S-T return The record of granting and interruption is completed, and after completion, it returns to S11 to perform a number of safety inspections; therefore, the constant frequency energy-saving system and method of the motor of the present invention can be characterized in constant frequency, variable voltage, and variable current. The SCR thyristor is controlled by the detection loop, and the AI control system determines the turn-on signal to trigger the power switching element SCR thyristor, and automatically detects the load change and adjusts the three-phase waveform, thereby changing the voltage and current output, providing the most appropriate output for the equipment, control The current is reasonably reduced to achieve the best current adaptability of the motor. The process can completely use "full frequency intelligent energy-saving control" to operate at full speed as the base load requirement, and automatically detect the load change of the three-
本發明一種電動機之定頻節能系統及方法的精神在於，利用一控制電路21以及一矽控整流器電路22用以驅動一三相電動機20。藉由定頻調整觸發該矽控整流器電路22，控制啟動該三相電動機20的電流。另外，本發明的一實施例使用微處理晶片作為控制電路21，同時搭配多個偵測單元300，能夠隨時監控環境變化以及三相電動機20操作狀況，以達到及時保護三相電動機20設備。在三相電動機20正常運轉且所有檢測
正常時，自動開始計算執行定頻切割觸發導通，以定頻控制驅動一般選用較大安全規格之三相電動機20可正常運作，同時又能達到節省啟動電流以及節能之功效。
The spirit of a fixed frequency energy saving system and method for a motor of the present invention is that a
綜上所述，本發明新穎實用完全符合專利要件，爰提出發明專利申請。惟以上所述者，僅為本發明之較佳實施例而已，當不能以此限定本發明實施之範圍；故凡依本發明申請專利範圍及創作說明書內容所作之等效變化與修飾，皆應屬本發明專利涵蓋之範圍內。 To sum up, the novelty and practicality of the present invention fully complies with the patent requirements, and a patent application for invention is filed. However, the above are only preferred embodiments of the present invention, and should not limit the scope of implementation of the present invention; therefore, any equivalent changes and modifications made according to the scope of the patent application of the present invention and the contents of the creation specification should be It belongs to the scope covered by the patent of the present invention.
301:16位元微處理器 301: 16-bit Microprocessor
302:矽控整流單元 302: Silicon controlled rectifier unit
303:三相電壓電流偵測單元 303: Three-phase voltage and current detection unit
304:三相頻率偵測裝置 304: Three-phase frequency detection device
305:三相相位偵測單元 305: Three-phase phase detection unit
306:電子溫度偵測裝置 306: Electronic temperature detection device
307:電源供應模組 307: Power Supply Module
308:顯示驅動模組 308: Display driver module
309:通訊模組 309: Communication module
310:電扇 310: Fan
311:保險絲裝置 311: Fuse device
320:防盜編碼單元 320: Anti-theft coding unit
330:安全跳脫單元 330: Safety trip unit
Claims (4)
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