TW202010228A - Control circuit for switching on-off state at zero crossing point by which the variation of the alternating load cannot be found by a user and an energy saving effect can be achieved - Google Patents

Control circuit for switching on-off state at zero crossing point by which the variation of the alternating load cannot be found by a user and an energy saving effect can be achieved Download PDF

Info

Publication number
TW202010228A
TW202010228A TW107130385A TW107130385A TW202010228A TW 202010228 A TW202010228 A TW 202010228A TW 107130385 A TW107130385 A TW 107130385A TW 107130385 A TW107130385 A TW 107130385A TW 202010228 A TW202010228 A TW 202010228A
Authority
TW
Taiwan
Prior art keywords
state
control circuit
control
control switch
half cycle
Prior art date
Application number
TW107130385A
Other languages
Chinese (zh)
Other versions
TWI683512B (en
Inventor
梁偉成
張平
Original Assignee
喆富創新科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 喆富創新科技股份有限公司 filed Critical 喆富創新科技股份有限公司
Priority to TW107130385A priority Critical patent/TWI683512B/en
Application granted granted Critical
Publication of TWI683512B publication Critical patent/TWI683512B/en
Publication of TW202010228A publication Critical patent/TW202010228A/en

Links

Images

Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Landscapes

  • Control Of Ac Motors In General (AREA)

Abstract

This invention relates to a control circuit for switching an on-off state at a zero crossing point, which is applied to an alternating load. The control circuit includes a control switch and a processing unit, wherein the control switch can be connected in series with the alternating load and can receive an alternating current from the outside; the processing unit can control the control switch to be in a turned-on state or a turned-off state; in addition, after receiving a turning-on instruction, the processing unit can control the control switch to be in the turned-on state when a voltage waveform of the alternating current is on a zero point; after receiving a turning-off instruction, the processing unit can control the control switch to be in a turned-off state when the current waveform of the alternating current is on the zero point; and the turned-off state of the control switch can be kept for at least one half cycle; in this way, the variation of the alternating load cannot be found by a user, and an energy saving effect can be achieved.

Description

在跨零點切換開關狀態之控制電路 Control circuit for switching state at zero crossing

本發明係關於交流負載(如：感應馬達、電熱器...)的控制電路，尤指一種能夠在跨零點時，切換開關之導通或關斷狀態，藉以調節負載功率的控制電路。 The invention relates to a control circuit of an AC load (such as an induction motor, an electric heater...), in particular to a control circuit capable of switching the on or off state of a switch when crossing a zero point to adjust the load power.

查，目前調節負載功率(如：調光器)的驅動方式，大致分為前切式(leading edge)與後切式(tailing edge)，其中，前切式(leading edge)是指調光開關調整輸出電壓的角度是在半周期的前緣進行控制，請參閱第1A~1B圖所示，每一個半周期之前緣會先保持關斷(如第1A~1B圖之虛線所示)，之後再保持導通，直至下一個半周期，因此，愈早導通的情況下，其平均功率較高，意即，第1A~1B圖兩者相較之下，第1A圖的亮度會較高。 Check, the current driving method for adjusting the load power (such as: dimmer) is roughly divided into a leading edge (leading edge) and a trailing edge (tailing edge), where the leading edge (leading edge) refers to the dimmer switch The angle of adjusting the output voltage is controlled at the leading edge of the half cycle. Please refer to Figures 1A~1B. The leading edge of each half cycle will be kept off first (as shown by the dotted line in Figures 1A~1B), and then It stays on until the next half cycle. Therefore, the earlier it turns on, the higher the average power, which means that the brightness of Figure 1A will be higher when the two figures 1A~1B are compared.

承上，後切式(tailing edge)則是指調光開關調整輸出電壓的角度是在半周期的後緣進行控制，請參閱第2A~2B圖所示，每一個半周期之前緣會先保持導通，之後會再進行關斷(如第2A~2B圖之虛線所示)，直至下一個半周期，因此，愈早關斷的情況下，其平均功率較低，意即，第2A~2B圖兩者相較之下，第2A圖的亮度會較高。 As mentioned above, the tailing edge refers to the angle at which the dimming switch adjusts the output voltage is controlled at the trailing edge of the half cycle. Please refer to Figures 2A~2B, the leading edge will be maintained before each half cycle Turn on, and then turn off (as shown by the dotted line in Figures 2A~2B) until the next half cycle, so the earlier the turn off, the lower the average power, which means that the 2A~2B Comparing the two figures, the brightness of Figure 2A will be higher.

另，發明人欲將前述的驅動方式應用至一般交流負載(如：感應馬達、電熱器...等)上，以藉由控制平均電流而達到控制功率的效果 (如：感應馬達之轉速、電熱器之溫度...等)。茲以感應馬達與電熱器為例，進行說明，首先，感應馬達(Induction motor)係為交流電動機，其是通過定子產生的旋轉磁場與轉子繞組的相對運動，使得轉子繞組切割磁感線產生感應電動勢，進而令轉子繞組中產生感應電流。之後，轉子繞組中的感應電流會與磁場作用，產生電磁轉矩，使轉子旋轉。然而，發明人發現，若感應馬達採用前切式時，會造成輔線圈的電容工作不正常；若感應馬達採用後切式時，則會因馬達電感產生強大突波。其次，電熱器通常為電阻負載，根據焦耳定律，其所產生的熱量會與通電時間呈正比，惟，發明人發現，針對電熱器而言，無論採用前切式或後切式等方式，都會造成功率因數的大幅降低，不甚理想。 In addition, the inventor wants to apply the aforementioned driving method to general AC loads (such as induction motors, electric heaters, etc.) to achieve the effect of controlling the power by controlling the average current (such as the speed of the induction motor, The temperature of the electric heater...etc). The induction motor and the electric heater are taken as examples for description. First, the induction motor is an AC motor, which is the relative motion of the rotating magnetic field generated by the stator and the rotor winding, so that the rotor winding cuts the magnetic induction line to induce The electromotive force, in turn, induces current in the rotor winding. After that, the induced current in the rotor winding will act with the magnetic field to generate electromagnetic torque, which will rotate the rotor. However, the inventor found that if the induction motor adopts the front cut type, it will cause the capacitance of the auxiliary coil to work abnormally; if the induction motor adopts the back cut type, a strong surge due to the motor inductance will be generated. Secondly, the electric heater is usually a resistive load. According to Joule's law, the heat generated is proportional to the energization time. However, the inventor found that for the electric heater, no matter whether it is a front cut type or a back cut type, etc. The power factor is greatly reduced, which is not ideal.

綜上所述，如何針對現有交流負載的問題，設計出一種更為理想的控制電路，以在進行關斷操作控制功率時，能大幅降低前述問題的發生機率，即成為本發明所欲解決之重要課題。 In summary, how to design a more ideal control circuit for the problem of the existing AC load can greatly reduce the probability of the aforementioned problem when the shutdown operation is performed to control the power, which is to be solved by the present invention important topic.

為能有效解決前述問題，發明人憑藉著多年來專業從事各式功率電子、控制、與系統設計、加工及製造之豐富實務經驗，且秉持著精益求精的研究精神，在經過長久的努力研究與實驗後，終於研發出本發明之一種在跨零點切換開關狀態之控制電路，期藉由本發明之問世，提供使用者更佳的產品使用經驗。 In order to effectively solve the aforementioned problems, the inventor has relied on the rich practical experience in the design, processing and manufacturing of various types of power electronics, control, and system for many years, and upholds the research spirit of excellence, after a long-term hard research and experiment Afterwards, a control circuit for switching the switch state across the zero point of the present invention was finally developed. With the advent of the present invention, it provides users with better product experience.

本發明之一目的，係提供一種在跨零點切換開關狀態之控制電路，其應用至一交流負載上，該控制電路包括一控制開關與一處理單元，其中，該控制開關會與該交流負載相串聯，且能接收外部傳來之交流電； 該處理單元則電氣連接至該控制開關，且能控制該控制開關之導通狀態或關斷狀態；本發明之特徵在於，當處理單元接收到一導通指令後，其會在交流電之電壓波形為零點時，令該控制開關呈導通狀態；當處理單元接收到一關斷指令後，其會在交流電之電流波形為零點時，令該控制開關呈關斷狀態，且該控制開關之關斷狀態會保持至少一個的半周期。 An object of the present invention is to provide a control circuit for switching a switch state across a zero point, which is applied to an AC load. The control circuit includes a control switch and a processing unit, wherein the control switch is in phase with the AC load It is connected in series and can receive AC power from outside; the processing unit is electrically connected to the control switch and can control the on or off state of the control switch; the feature of the invention is that when the processing unit receives an on command After that, when the voltage waveform of the alternating current is zero, the control switch is turned on; when the processing unit receives a turn-off command, it will turn off the control switch when the current waveform of the alternating current is zero. State, and the off state of the control switch will be maintained for at least one half cycle.

為便 貴審查委員能對本發明目的、技術特徵及其功效，做更進一步之認識與瞭解，茲舉實施例配合圖式，詳細說明如下： In order for your reviewing committee to have a better understanding and understanding of the purpose, technical features and efficacy of the present invention, the following examples are used in conjunction with the drawings, which are described in detail as follows:

〔習知〕 〔Knowledge〕

無 None

〔本發明〕 〔this invention〕

1‧‧‧控制電路 1‧‧‧Control circuit

10‧‧‧馬達定子線圈 10‧‧‧motor stator coil

11、11’‧‧‧控制開關 11.11’‧‧‧Control switch

13‧‧‧處理單元 13‧‧‧Processing unit

AC‧‧‧交流電 AC‧‧‧AC

U‧‧‧輔助線圈 U‧‧‧Auxiliary coil

C‧‧‧電容 C‧‧‧Capacitance

V‧‧‧電壓波形 V‧‧‧ voltage waveform

A‧‧‧電流波形 A‧‧‧Current waveform

第1A圖係前切式的一波形示意圖；第1B圖係前切式的另一波形示意圖；第2A圖係後切式的一波形示意圖；第2B圖係後切式的另一波形示意圖；第3圖係本發明之控制電路的一實施例；第4圖係本發明之控制電路的另一實施例；第5圖係交流電之電壓波形與電流波形的示意圖；第6A圖係本發明之「導通」與「關斷」呈規律變化的一波形圖；第6B圖係本發明之「導通」與「關斷」呈規律變化的另一波形圖；及第7圖係本發明之驅動訊號為不規律的示意圖。 Figure 1A is a schematic diagram of a waveform of the front-cut type; Figure 1B is a schematic diagram of another waveform of the front-cut type; Figure 2A is a schematic diagram of a waveform of the back-cut type; Figure 2B is another schematic diagram of a waveform of the back-cut type; Figure 3 is an embodiment of the control circuit of the present invention; Figure 4 is another embodiment of the control circuit of the present invention; Figure 5 is a schematic diagram of the voltage waveform and current waveform of alternating current; Figure 6A is the present invention A waveform diagram of "on" and "off" changing regularly; Figure 6B is another waveform diagram of "on" and "off" changing regularly; and Figure 7 is a driving signal of the present invention It is an irregular schematic diagram.

本發明係一種在跨零點切換開關狀態之控制電路，係應用至一交流負載上，為方便說明，後敘實施例係以感應馬達(如：鼠籠式馬達) 為例，請參閱第3圖所示，該感應馬達之一馬達定子線圈10在接收到外部傳來的交流電AC後能形成旋轉磁場，以使一轉子旋轉，令該轉子能驅動一裝置(如：風扇)運作，在此特別一提者，由於感應馬達的結構與運作原理為習知技術，本發明主要是設計出一種控制電路，以使該感應馬達於運作時，能在使用者無法察覺的情況下，進行短暫的關斷，除能達到節能效果外，亦能將扭力變化分散，而不易產生噪音與震動。故，在後續實際例中，並不繪製出整個感應馬達的具體結構，但熟悉該領域之技藝人士，當能在觀看本發明之說明書後，瞭解本發明的整體技術特徵，而不會產生歧異。 The present invention is a control circuit that switches the state of a switch across zero points. It is applied to an AC load. For convenience of description, the following embodiment uses an induction motor (such as a squirrel-cage motor) as an example. Please refer to FIG. 3 As shown, the motor stator coil 10 of one of the induction motors can form a rotating magnetic field after receiving the alternating current AC from the outside to rotate a rotor, so that the rotor can drive a device (such as a fan) to operate, in particular Firstly, because the structure and operation principle of induction motors are conventional technologies, the present invention mainly designs a control circuit to enable the induction motor to perform a brief shutdown without the user's awareness during operation. In addition to the energy-saving effect, it can also disperse the torque changes without generating noise and vibration. Therefore, in the subsequent practical examples, the specific structure of the entire induction motor is not drawn, but those skilled in the art can understand the overall technical features of the present invention after viewing the description of the present invention without causing ambiguity. .

請參閱第3圖所示，在一實施例中，該控制電路1包括一控制開關11與一處理單元13，其中，該控制開關11係與該馬達定子線圈10相串聯，且能接收外部傳來之交流電AC，又，在該實施例中，一輔助線圈U與一電容C相串聯，且該馬達定子線圈10會與該輔助線圈U、電容C相並聯，該控制開關11則能同時串聯該馬達定子線圈10與輔助線圈U，惟，在本發明之另一實施例中，請參閱第4圖所示，控制開關11’能夠與輔助線圈U相並聯，但仍會與該馬達定子線圈10相串聯，合先陳明。 Please refer to FIG. 3, in an embodiment, the control circuit 1 includes a control switch 11 and a processing unit 13, wherein the control switch 11 is connected in series with the motor stator coil 10 and can receive external transmission From the alternating current AC, in this embodiment, an auxiliary coil U is connected in series with a capacitor C, and the motor stator coil 10 is connected in parallel with the auxiliary coil U and capacitor C, and the control switch 11 can be connected in series at the same time. The motor stator coil 10 and the auxiliary coil U. However, in another embodiment of the present invention, please refer to FIG. 4, the control switch 11 ′ can be connected in parallel with the auxiliary coil U, but will still be connected to the motor stator coil The 10 phases are connected in series, first together.

另，復請參閱第3圖所示，該處理單元13能電氣連接至該控制開關11，且能控制該控制開關11之導通狀態或關斷狀態，其中，該控制開關11能夠為「矽控整流開關(Silicon Controlled Rectifier，簡稱SCR)」、「三端雙向交流開關(TRIAC)」或是由「一橋式整流器搭配金屬氧化物半導體場效電晶體(Metal-Oxide-Semiconductor Field-Effect Transistor，簡稱MOSFET)」所組成，但不以此為限。一般言，若是負載具有電容性或者電感性的成分，則可能會使電流波形與電壓波形之間，形成提早或延遲的相 位差，如第5圖所示，實線部分為交流電之電壓波形V，虛線部分則為交流電之電流波形A，且電流波形A之周期會略為晚於電壓波形V之周期，惟，不同的元件則具有不同的特性，例如，矽控元件則會一直維持導通，直到電流為零時，才會形成關斷的狀態，合先敘明。又，本發明之特徵在於，當該處理單元13接收到一導通指令後，其不會立即將控制開關11導通，而是在零點附近(即，在半周期(如：正半周朝負半周變化、負半周朝正半周變化)跨零點時(即，電壓為零))的狀態，才會使該控制開關11呈導通狀態。 In addition, please refer to FIG. 3 again, the processing unit 13 can be electrically connected to the control switch 11 and can control the on or off state of the control switch 11, wherein the control switch 11 can be “silicon controlled Rectifier switch (Silicon Controlled Rectifier, SCR), "TRIAC" or "one-bridge rectifier with metal-oxide semiconductor field effect transistor (Metal-Oxide-Semiconductor Field-Effect Transistor, abbreviated MOSFET), but not limited to this. Generally speaking, if the load has a capacitive or inductive component, it may cause an early or delayed phase difference between the current waveform and the voltage waveform. As shown in Figure 5, the solid line part is the voltage waveform V of the alternating current , The dotted line is the current waveform A of the alternating current, and the period of the current waveform A will be slightly later than the period of the voltage waveform V. However, different devices have different characteristics, for example, the silicon control device will remain on until When the current is zero, it will be turned off, which will be described first. Moreover, the present invention is characterized in that when the processing unit 13 receives a turn-on command, it does not turn on the control switch 11 immediately, but is near the zero point (ie, changes in a half cycle (eg, positive half cycle to negative half cycle) , The negative half cycle changes toward the positive half cycle) when the state crosses the zero point (that is, the voltage is zero)), the control switch 11 is turned on.

承上，復請參閱第3圖所示，當該處理單元13接收到一關斷指令後，其不會立即將控制開關11關斷，而同樣在零點附近(即，在半周期(如：正半周朝負半周變化、負半周朝正半周變化)跨零點時(即，電流為零))的狀態，才會使該控制開關11呈關斷狀態，且該控制開關11之關斷狀態會保持至少一個半周期，例如第6A~6B所示，根據使用上的需求，能夠每導通二周期後再關斷一周期(如第6A圖)，或是每導通一周期後再關斷半周期(如第6B圖)，又，在前述方式中，「導通」與「關斷」是呈規律變化，但是，此種規律變化容易造成震動或噪音現象被使用者察覺，影響了產品的使用觀感，因此，處理單元13亦可如第7圖般，是採用不規律的驅動訊號，如第7圖由左至右來說，其中，導通指令為「ON」，關斷指令為「OFF」，處理單元13能使控制開關11先導通一周期後再關斷半周期，嗣，導通一個半的周期後再關斷半周期，又導通一周期後再關斷半周期...等，如此，感應馬達於運轉時所產生的扭力，便會隨著時間的斷續頻率被分散，使得其產生之震動或噪音現象較不容易被使用者察覺。 As mentioned above, please refer to FIG. 3, when the processing unit 13 receives a turn-off command, it will not turn off the control switch 11 immediately, but also in the vicinity of the zero point (ie, in a half cycle (eg: Only when the positive half cycle changes toward the negative half cycle and the negative half cycle changes toward the positive half cycle) when the zero point is crossed (ie, the current is zero)) will the control switch 11 be turned off, and the control switch 11 will be turned off Maintain at least one half cycle, as shown in 6A~6B, according to the needs of use, it can be turned off for one cycle after every two cycles (as shown in Figure 6A), or half cycle after every one cycle (As shown in Figure 6B) In addition, in the aforementioned method, "on" and "off" are changed regularly, but this regular change is easy to cause vibration or noise to be noticed by the user, which affects the perception of the product. Therefore, as shown in Figure 7, the processing unit 13 can also use irregular driving signals. As shown in Figure 7 from left to right, the turn-on command is "ON" and the turn-off command is "OFF". The processing unit 13 can enable the control switch 11 to turn on for one cycle and then turn off the half cycle, then, turn on for one and a half cycles and then turn off the half cycle, and turn on for one cycle and then turn off the half cycle... etc., so, The torsional force generated by the induction motor during operation will be dispersed over time with intermittent frequencies, making the vibration or noise generated by it less likely to be noticed by the user.

再者，當感應馬達運轉時，若將其斷電(即，控制開關11呈 關斷狀態)後，仍會因慣性而保持運轉，但運轉速度會逐漸降低，因此，控制開關11呈關斷狀態的時間勢必不能太久，否則會讓使用者明顯發現轉速發生變化，其中，當感應馬達(連同負載)速度由正常運轉速度，降低正常運轉速度的一半時，前述所花費的時間稱之為「慣性持續時間」，而控制開關11呈關斷狀態的時間需小於「慣性持續時間」，且關斷時間愈小愈佳。以風扇為例，其正常轉速通常為300rpm~1200rpm(每分鐘轉速)，週期約為50ms(毫秒)~200ms，又，由於「慣性持續時間」通常為好幾秒鐘，因此，單就風扇來說，該控制開關11呈關斷狀態的時間以小於1秒鐘為佳，而交流電AC之變化普遍為50Hz~60Hz，其半周期約為8ms~10ms，故，根據交流電AC之半周期來調整控制開關11的導通狀態與關斷狀態，便能夠在使用者不察覺到轉速有間歇變化的情況下，達成節能功效。 In addition, when the induction motor is running, if it is powered off (ie, the control switch 11 is turned off), it will still keep running due to inertia, but the operating speed will gradually decrease, so the control switch 11 is turned off The time in the state must not be too long, otherwise the user will notice that the speed has changed obviously. Among them, when the speed of the induction motor (along with the load) is reduced from the normal operating speed by half, the time spent is called "Inertia duration", and the time that the control switch 11 is in the off state needs to be less than "Inertia duration", and the smaller the off time, the better. Taking a fan as an example, its normal speed is usually 300rpm~1200rpm (speed per minute), the cycle is about 50ms (millisecond)~200ms, and because the "inertia duration" is usually several seconds, so for the fan alone The time when the control switch 11 is in the off state is preferably less than 1 second, and the change of the alternating current AC is generally 50 Hz to 60 Hz, and its half cycle is about 8 ms to 10 ms. Therefore, the control is adjusted according to the half cycle of the alternating current AC The on state and the off state of the switch 11 can achieve the energy saving effect without the user noticing that the rotation speed changes intermittently.

同理可知，在電熱器被斷電時，其溫度仍會保持於當前溫度，之後才會逐漸下降(相當於前述「慣性持續時間」)，因此，當本發明之控制電路應用於電熱器時，若控制開關呈關斷狀態的時間小於「慣性持續時間」，即能令使用者無法察覺到溫度有明顯下降的情況下，調節負載功率進而達成節能功效。 Similarly, it can be seen that when the heater is powered off, its temperature will remain at the current temperature, and then it will gradually decrease (equivalent to the aforementioned "inertia duration"). Therefore, when the control circuit of the present invention is applied to the heater If the time when the control switch is in the off state is less than the "inertial duration", the user can adjust the load power to achieve energy saving without noticeable temperature drop.

按，以上所述，僅係本發明之較佳實施例，惟，本發明所主張之權利範圍，並不侷限於此，按凡熟悉該項技藝人士，依據本發明所揭露之技術內容，可輕易思及之等效變化，均應屬不脫離本發明之保護範疇。 According to the above, it is only the preferred embodiment of the present invention. However, the scope of the claimed rights of the present invention is not limited to this. According to the technical content disclosed by the present invention, anyone who is familiar with this skill can Equivalent changes that can be easily considered should fall within the protection scope of the present invention.

1‧‧‧控制電路 1‧‧‧Control circuit

10‧‧‧馬達定子線圈 10‧‧‧motor stator coil

11‧‧‧控制開關 11‧‧‧Control switch

13‧‧‧處理單元 13‧‧‧Processing unit

AC‧‧‧交流電 AC‧‧‧AC

U‧‧‧輔助線圈 U‧‧‧Auxiliary coil

C‧‧‧電容 C‧‧‧Capacitance

Claims (9)

一種在跨零點切換開關狀態之控制電路，係應用至一交流負載上，該控制電路包括：一控制開關，係與該交流負載相串聯，且能接收外部傳來之交流電；及一處理單元，係電氣連接至該控制開關，且能控制該控制開關之導通狀態或關斷狀態；在處理單元接收到一導通指令後，其會在交流電之電壓波形由正半周朝負半周變化或負半周朝正半周變化，並為零點附近的狀態下，才會使該控制開關呈導通狀態；在處理單元接收到一關斷指令後，其會在交流電之電流波形由正半周朝負半周變化或負半周朝正半周變化，並為零點附近的狀態下，才會使該控制開關呈關斷狀態，且該控制開關之關斷狀態會保持至少一個的半周期。 A control circuit that switches the state of a switch across zero points is applied to an AC load. The control circuit includes: a control switch connected in series with the AC load and capable of receiving external AC power; and a processing unit, It is electrically connected to the control switch and can control the on-state or off-state of the control switch; after the processing unit receives a turn-on command, it will change the voltage waveform of the alternating current from positive half cycle to negative half cycle or negative half cycle When the positive half cycle changes and is near the zero point, the control switch will be turned on; after the processing unit receives a turn-off command, its current waveform will change from positive half cycle to negative half cycle or negative half cycle The change towards the positive half cycle and near the zero point will cause the control switch to be in the off state, and the off state of the control switch will be maintained for at least one half cycle. 如請求項1所述之控制電路，其中，該控制開關呈關斷狀態的時間低於該交流負載的慣性持續時間。 The control circuit according to claim 1, wherein the time when the control switch is in the off state is lower than the inertial duration of the AC load. 如請求項2所述之控制電路，其中，該交流負載為一感應馬達，該感應馬達之一馬達定子線圈在接收到外部傳來的交流電後能形成旋轉磁場，以使一轉子旋轉，令該轉子能驅動一裝置運作，且該馬達定子線圈與該控制開關相串聯，並能接收外部傳來之交流電。 The control circuit according to claim 2, wherein the AC load is an induction motor, and a motor stator coil of the induction motor can form a rotating magnetic field after receiving AC power from the outside to rotate a rotor, so that the The rotor can drive a device to operate, and the stator coil of the motor is connected in series with the control switch and can receive AC power from outside. 如請求項2所述之控制電路，其中，該交流負載為一電熱器。 The control circuit according to claim 2, wherein the AC load is an electric heater. 如請求項1至4任一項所述之控制電路，其中，該控制開關係規律變化其導通狀態與關斷狀態。 The control circuit according to any one of claims 1 to 4, wherein the control-on relationship regularly changes its on-state and off-state. 如請求項1至4任一項所述之控制電路，其中，該控制開關係不規律變化其導通狀態與關斷狀態。 The control circuit according to any one of claims 1 to 4, wherein the control-on relationship changes its on-state and off-state irregularly. 如請求項6所述之控制電路，其中，該控制開關為矽控整流開關。 The control circuit according to claim 6, wherein the control switch is a silicon controlled rectifier switch. 如請求項6所述之控制電路，其中，該控制開關為三端雙向交流開關。 The control circuit according to claim 6, wherein the control switch is a three-terminal bidirectional AC switch. 如請求項6所述之控制電路，其中，該控制開關為橋式整流器搭配金屬氧化物半導體場效電晶體所組成。 The control circuit according to claim 6, wherein the control switch is composed of a bridge rectifier and a metal oxide semiconductor field effect transistor.
TW107130385A 2018-08-30 2018-08-30 Control circuit for switching state at zero crossing TWI683512B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
TW107130385A TWI683512B (en) 2018-08-30 2018-08-30 Control circuit for switching state at zero crossing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW107130385A TWI683512B (en) 2018-08-30 2018-08-30 Control circuit for switching state at zero crossing

Publications (2)

Publication Number Publication Date
TWI683512B TWI683512B (en) 2020-01-21
TW202010228A true TW202010228A (en) 2020-03-01

Family

ID=69942952

Family Applications (1)

Application Number Title Priority Date Filing Date
TW107130385A TWI683512B (en) 2018-08-30 2018-08-30 Control circuit for switching state at zero crossing

Country Status (1)

Country Link
TW (1) TWI683512B (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI268034B (en) * 2004-04-19 2006-12-01 Che-Chuan Lin Method for controlling the output of an electrical apparatus connected to an AC line voltage
TWM513393U (en) * 2015-07-20 2015-12-01 Artilect Green Co Ltd AC power switch circuit
TWI609665B (en) * 2016-02-16 2018-01-01 Matsushita Electric Taiwan Co Ltd Food conditioner

Also Published As

Publication number Publication date
TWI683512B (en) 2020-01-21

Similar Documents

Publication Publication Date Title
CA2628529C (en) Method and apparatus for quiet fan speed control
WO2010050072A1 (en) Ac voltage control device
WO2006133154A1 (en) Method and apparatus for quiet variable motor speed control
EP2386928B1 (en) Phase control apparatus
JP2015171226A (en) inverter device and air conditioner
EP1774644A1 (en) Drive circuit for a synchronous electric motor
TWI683512B (en) Control circuit for switching state at zero crossing
CN103618493A (en) Single-winding single-phase AC motor control module
WO2011052214A1 (en) Electrical power converter and induction heating device using same, and electrically driven device
AU2013404555B2 (en) Control apparatus for DC variable frequency motor
CN111049461A (en) Control circuit for switching switch state at zero crossing point
JP2012165594A (en) Motor drive device
US6140795A (en) Variable speed control for AC induction motors
US9291169B2 (en) Fan motor control device
KR101039435B1 (en) Apparatus and method for controlling motor
TWI648944B (en) Control circuit for adjusting motor speed with electric power
TW201433078A (en) Brushless direct current motor control device
JP2003088158A (en) Motor controller
EP3883120A2 (en) Technologies for adaptive multi-pulse commutation for brushless direct current motors
JP2001016881A (en) Inverter-controlled motor
US20160301349A1 (en) Household appliance with multiple synchronous motors and control circuit thereof
JP2001211679A (en) Motor controller
JP2001086784A (en) Motor control method
CN116065327A (en) Washing equipment and motor starting control method thereof
CN103715950A (en) Driving device of switched reluctance motor