WO2016059942A1 - 3相交流直流変換装置及びそれを用いた光化学反応装置と方法並びにラクタムの製造方法 - Google Patents
3相交流直流変換装置及びそれを用いた光化学反応装置と方法並びにラクタムの製造方法 Download PDFInfo
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- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
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- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
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- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
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- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M7/2173—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a biphase or polyphase circuit arrangement
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- B01J2219/0877—Liquid
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- C07C2601/18—Systems containing only non-condensed rings with a ring being at least seven-membered
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- C07D201/00—Preparation, separation, purification or stabilisation of unsubstituted lactams
- C07D201/02—Preparation of lactams
- C07D201/04—Preparation of lactams from or via oximes by Beckmann rearrangement
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- C07D225/02—Heterocyclic compounds containing rings of more than seven members having one nitrogen atom as the only ring hetero atom not condensed with other rings
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- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
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- H05B45/345—Current stabilisation; Maintaining constant current
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- H05B45/30—Driver circuits
- H05B45/395—Linear regulators
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- 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
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Definitions
- the present invention relates to a three-phase AC / DC converter for driving a group of light-emitting diodes (hereinafter also referred to as LEDs), a photochemical reaction device and method using the three-phase AC / DC converter, and a photochemical reaction thereof.
- the present invention relates to a method for producing a lactam using the method.
- a three-phase full-wave rectifier circuit has been used for three-phase AC rectification.
- Va ⁇ Vc voltage of three-phase
- a smoothing capacitor C added to the output side is a three-phase full-wave rectifier circuit with a smoothing capacitor as shown in FIG. According to this, although the output wave is further stabilized as shown in FIG. 3, the electricity stored in the smoothing capacitor C returns to the AC side through the circuit that is most likely to flow at that time. It becomes an ear shape and causes troubles due to harmonics.
- FIG. 5 illustrates an inverter drive circuit based on PWM control.
- the PWM signal outputs a desired waveform by comparing the waveform as an input signal with a desired waveform set in advance and measuring the difference between them to determine the on / off timing and width of the switches S1 and S2. Technology. As shown in the figure, an output waveform close to a desired waveform set on the input side can be obtained.
- each waveform of i a , i b , and ic is made a sine wave
- Control is performed by a computer so as to control to minimize the phase difference from the voltage on the primary AC side.
- the current is normally rectified by a bridge circuit and a capacitor, but switching for constant voltage control is performed while performing rectification on the secondary side by rectifying using a switching element under PWM control.
- the current waveform is synchronized with the primary voltage, and it is possible to eliminate waveform distortion such as primary harmonics, noise, and high frequencies. This makes it possible to remove harmonics and noise superimposed on the primary side transformer.
- the output voltage on the secondary side can be controlled at a constant level, the accuracy of the constant voltage on the secondary side can be improved.
- the transformer on the primary side can be a sine wave, and a voltage drop can be suppressed.
- Driving an LED requires a DC power supply, and it is essential to maintain the DC voltage fluctuation range within the LED lighting voltage range due to the characteristics of the LED. However, since the range is narrow, the accuracy required to maintain the voltage is required. Will be. In order to drive a large number of LEDs, for example, in order to drive a large number of LED groups, a large number of constant current devices are required. However, waveform distortion due to noise, high frequency, and the like increases accordingly. When a general diode converter is used as a three-phase AC / DC converter for driving the LED group, harmonics, high frequencies and noise are generated in the primary side transformer, resulting in a power supply voltage drop. As a result, the output voltage on the secondary side for driving the LED group also decreases, and as a result, there is a possibility of causing a situation below the minimum voltage required for the LED group. A phenomenon may occur, and it has been difficult to maintain continuous lighting.
- an object of the present invention is a three-phase alternating current that can be used to drive a large-capacity light emitting diode group, particularly 3 kW or more, with one unit, and can eliminate the possibility of the occurrence of light-emitting diode extinction or blinking phenomenon.
- the object is to provide a DC converter.
- Another object of the present invention is to provide a photochemical reaction device and method having a light irradiation device equipped with the three-phase AC / DC converter as described above, and a lactam production method using the photochemical reaction method.
- a three-phase AC / DC converter is a power source provided between a three-phase AC power source and the light-emitting diode group in order to drive a light-emitting diode group of 3 kw or more with one unit.
- a three-phase AC / DC converter incorporated in a circuit, DC bus connected to the light emitting diode group, A three-phase full bridge comprising a pair of switching elements connected in series and connected in parallel between the DC buses for three phases of the three-phase AC power source, and having a reverse blocking diode in which each switching element is connected in parallel Circuit, A reactor provided between the three-phase full-bridge circuit and the three-phase AC power source, and connecting a connection portion between the switching elements in each of the pair of switching elements and a corresponding phase of the three-phase AC power source; A smoothing capacitor connected between the DC buses on the output side of the three-phase full-bridge circuit; DC voltage detecting means for detecting an output voltage between the DC buses; Power supply voltage phase detection means for detecting a power supply voltage phase of the three-phase AC power supply; Pulse width modulation means for outputting a pulse width modulation signal for controlling each of the switching elements, The pulse width modulation means outputs the pulse width modulation signal based on the power supply voltage phase and the output voltage
- Such a three-phase AC / DC converter by using a converter composed of a three-phase full-bridge circuit in which a switching element capable of PWM control is combined with a DC conversion unit, High frequency, noise, and high frequency generated on the primary side can be corrected to obtain a power waveform without distortion, and a voltage drop at the primary side transformer (reactor) is suppressed. Also, by using constant voltage control that can control the DC voltage on the secondary side to a constant level, PWM control is applied to a three-phase full bridge circuit that combines switching elements, and a smoothing capacitor is provided on the output side.
- a plurality of constant current circuits for controlling the current to the light emitting diode group to be constant are provided in parallel on the output side of the three-phase full bridge circuit.
- the plurality of constant current circuits may be arranged according to the installation form of the light emitting diode groups, and may be arranged at a position immediately before each light emitting diode group of the power supply circuit to each light emitting diode group.
- the constant current circuit any commonly used one can be used, and a commercially available constant current circuit can be used.
- the output voltage between the DC buses is 100 V or more and the voltage drop is 10% or less. It is preferable to be controlled. In particular, by suppressing the voltage drop to 10% or less, even a large LED module can be stably lit continuously.
- one constant current circuit can control a constant current of 1 ampere or more for the plurality of constant current circuits provided in parallel. It is preferable.
- the photochemical reaction device comprises a light irradiation device including a light emitting diode group connected to the above three-phase AC / DC converter.
- a light irradiation device including a light emitting diode group connected to the above three-phase AC / DC converter.
- the photochemical reaction method according to the present invention comprises a method characterized by using such a photochemical reaction device.
- the photochemical reaction method according to the present invention is particularly suitable for any photochemical reaction that requires a large-capacity light-emitting diode group to be stably and continuously lit.
- the present invention can be applied to a photochemical reaction in which the irradiation destination of light is a liquid and the composition of the liquid contains at least carbon atoms.
- the liquid to which the light is irradiated include cycloalkane.
- the cycloalkane include cyclohexane and cyclododecane.
- the photochemical reaction method according to the present invention is particularly suitable for the photochemical reaction for producing cycloalkanone oxime by irradiating such cycloalkane and photonitrosating agent with light.
- the photonitrosating agent include nitrosyl chloride or trichloronitrosomethane.
- the method for producing a lactam according to the present invention comprises a method characterized by using a cycloalkanone oxime produced by the photochemical reaction method as described above.
- this three-phase AC / DC converter when a light emitting body using a large-capacity light emitting diode group is caused to emit light, the occurrence of a voltage drop phenomenon is suppressed and the influence on the AC power supply side is also suppressed.
- the light emitting diode group can be stably and continuously lit. Therefore, this three-phase AC / DC converter is particularly effective for a photochemical reaction apparatus and method for irradiating light using a large-capacity light emitting diode group, and also a lactam using a cycloalkanone oxime produced by the photochemical reaction method. It can also contribute to the stabilization of the manufacturing method.
- FIG. 1 is a circuit diagram of a three-phase AC / DC converter according to an embodiment of the present invention. It is the circuit diagram which illustrated the conventional 3 phase full wave rectifier circuit.
- FIG. 5 is a waveform diagram illustrating output waveforms by the rectifier circuit of FIGS. 2 and 4.
- FIG. 3 is a circuit diagram illustrating a case where a smoothing capacitor is added to the three-phase full-wave rectifier circuit of FIG. 2. It is circuit explanatory drawing which illustrated and demonstrated the inverter drive circuit by the conventional PWM control.
- FIG. 1 shows a circuit of a three-phase AC / DC converter according to an embodiment of the present invention.
- a three-phase AC / DC converter 100 shown in FIG. 1 is incorporated in a power supply circuit provided between a three-phase AC power source 1 and a light-emitting diode group 2 in order to drive a light-emitting diode group of 3 kw or more by one unit.
- the three-phase AC / DC converter 100 includes a DC bus 3 connected to the light emitting diode group 2 and a pair of switching elements 4 connected in series between the DC bus 3 for the three phases of the three-phase AC power supply 1.
- a three-phase full bridge circuit 6 (a bridge circuit for three phases of U, V, and W) including a reverse blocking diode 5 in which each switching element 4 is connected in parallel, and the three-phase full Provided between the bridge circuit 6 and the three-phase AC power source 1, the connection between the switching elements 4 in each pair of switching elements 4 and the corresponding phases (R, S, T) of the three-phase AC power source 1
- a reactor 7 to be connected a smoothing capacitor 8 connected between the DC bus 3 on the output side of the three-phase full bridge circuit 6, DC voltage detecting means 9 for detecting an output voltage between the DC bus 3, and three phases AC power supply 1
- Power supply voltage phase detection means 10 for detecting the voltage phase
- pulse width modulation means (PWM means) 11 connected to each switching element 4 and outputting a pulse width modulation signal for controlling each switching element 4 ing.
- the pulse width modulation unit 11 modulates the pulse width to each switching element 4 based on the power supply voltage phase detected by the power supply voltage phase detection unit 10 and the output voltage between the
- the output voltage between the DC buses 3 detected and fed back by the DC voltage detection means 9 is compared with a preset output voltage command 12 and adjusted by the voltage regulator 13.
- a current based on the phase of the adjusted voltage and the power supply voltage phase detected by the power supply voltage phase detection means 10 is compared with the input current fed back from the input side of the three-phase full bridge circuit 6, and the current adjuster 14. After the adjustment, the pulse width modulation control by the pulse width modulation means 11 is provided.
- a plurality of light emitting diodes 15 are combined and connected to form one light emitting diode group 2, and the plurality of light emitting diode groups 2 are provided to form a large-scale light emitter 16.
- An apparatus having the light emitter 16 is configured as a light irradiation apparatus 17 used in, for example, a photochemical reaction apparatus.
- a constant current circuit 18 that controls the current to each light emitting diode group 2 to be constant is provided in parallel to the output side of a plurality of three-phase full bridge circuits 6.
- a converter including a three-phase full bridge circuit 6 in which a switching element 4 capable of PWM control is combined with a three-phase AC to DC converter is configured. Therefore, it is possible to correct the high frequency and noise on the secondary side, that is, the output side (DC bus 3 side) of the three-phase full-bridge circuit 6, and to correct the high frequency generated on the primary side to obtain a power waveform without distortion. Thus, the voltage drop on the primary side, that is, the input side (reactor 7 side) of the three-phase full bridge circuit 6 is suppressed.
- the DC voltage on the DC bus 3 side is controlled at a constant voltage with a smooth waveform, and by applying PWM control to the three-phase full bridge circuit 6, fluctuations can be achieved. A small and stable voltage supply is possible.
- the output voltage between the DC buses 3 is 100 V or more, the voltage drop can be easily suppressed to 10% or less, and the possibility of the LED turning off or blinking phenomenon due to the voltage drop is eliminated.
- the large LED module (light emitter 16) can be stably and continuously lit.
- a constant current circuit 18 for example, a constant current circuit capable of controlling a constant current of 1 ampere or more
- the current supplied to each light emitting diode group 2 is also stable.
- the power supply to the entire light emitter 16 is also stable, and the large-capacity light emitter 16 can be stably lit continuously.
- the light irradiation device 17 including the light-emitting diode group 2 connected to the three-phase AC / DC converter 100 as described above can be applied to various photochemical reaction devices, and can be used with a single three-phase AC / DC converter 100. Even in the case of the light-emitting diode group 2 having a capacity, all the light-emitting diode groups 2 can be stably lit continuously, and a desired photochemical reaction by the light irradiation device 17 can be stably performed.
- the irradiation destination of light can be liquid and contain carbon atoms. That is, in the photochemical reaction method according to the present invention, at least one irradiation destination of light can be a raw material system composed of a liquid.
- the raw material liquid is not particularly limited as long as it is a liquid containing carbon atoms, and examples of the reaction liquid include flammable liquids such as hydrocarbons such as alkanes and cycloalkanes.
- the number of carbon atoms is not particularly limited as the cycloalkane, but for example, cyclopropane, cyclobutane, cyclopentane, cyclohexane, cycloheptane, cyclooctane, cyclononane, cyclodecane, cycloundecane, and cyclododecane are preferable.
- cyclohexane as a raw material for caprolactam and cyclododecane as a raw material for lauryl lactam are preferable.
- cycloalkanone oxime is obtained by a photochemical reaction by light irradiation from a light irradiation device 17 as a light source.
- the photonitrosating agent for example, nitrosyl chloride or a mixed gas of nitrosyl chloride and hydrogen chloride is preferable.
- all of the mixed gas of nitric oxide and chlorine, mixed gas of nitric oxide, chlorine and hydrogen chloride, mixed gas of nitrose gas and chlorine, etc. act as nitrosyl chloride in the photochemical reaction system. It is not limited to the supply form of the nitrosating agent.
- trichloronitrosomethane obtained by photochemical reaction of nitrosyl chloride and chloroform may be used as a nitrosating agent.
- cycloalkanone oxime becomes its hydrochloride, but it may be in the form of hydrochloride as it is.
- the cycloalkanone oxime corresponding to the carbon number of the cycloalkane can be obtained by the above photochemical reaction.
- cyclohexanone oxime can be obtained by photonitrosation reaction with nitrosyl chloride using cyclohexane.
- cyclododecanone oxime can be obtained by photonitrosation reaction with nitrosyl chloride using cyclododecane.
- Lactam can be obtained by Beckmann rearrangement of cycloalkanone oxime obtained by photochemical reaction.
- ⁇ -caprolactam is obtained as shown in the following reaction formula [Chemical Formula 1].
- ⁇ -laurolactam is obtained in the reaction in which cyclododecanone oxime is Beckmann rearranged.
- the present invention can be applied to three-phase AC / DC converters in all fields where stable power supply to a large-capacity light emitting diode group is required, and particularly applicable to any photochemical reaction using a large-scale light irradiation device. It is useful when applied to the production of cycloalkanone oximes and lactams.
Abstract
Description
前記発光ダイオード群へと接続される直流母線と、
直列接続された一対のスイッチング素子が前記3相交流電源の3相分前記直流母線間に並列に接続されているとともに、各スイッチング素子が並列接続された逆阻止ダイオードを備えている3相フルブリッジ回路と、
該3相フルブリッジ回路と前記3相交流電源との間に設けられ、前記各一対のスイッチング素子におけるスイッチング素子間の接続部と前記3相交流電源の対応する相とを接続するリアクトルと、
前記3相フルブリッジ回路の出力側の前記直流母線間に接続された平滑用コンデンサと、
前記直流母線間の出力電圧を検出する直流電圧検出手段と、
前記3相交流電源の電源電圧位相を検出する電源電圧位相検出手段と、
前記各スイッチング素子を制御するパルス幅変調信号を出力するパルス幅変調手段と、を有し、
前記パルス幅変調手段は、前記電源電圧位相と前記直流母線間の出力電圧とに基づき、前記パルス幅変調信号を出力することを特徴とするものからなる。
図1は、本発明の一実施態様に係る3相交流直流変換装置の回路を示している。図1に示す3相交流直流変換装置100は、3kw以上の発光ダイオード群を1台で駆動するために3相交流電源1と発光ダイオード群2との間に設けられる電源回路に組み込まれる3相交流直流変換装置である。3相交流直流変換装置100は、発光ダイオード群2へと接続される直流母線3と、直列接続された一対のスイッチング素子4が上記3相交流電源1の3相分上記直流母線3間に並列に接続されているとともに、各スイッチング素子4が並列接続された逆阻止ダイオード5を備えている3相フルブリッジ回路6(U、V、Wの3相分のブリッジ回路)と、該3相フルブリッジ回路6と上記3相交流電源1との間に設けられ、各一対のスイッチング素子4におけるスイッチング素子4間の接続部と3相交流電源1の対応する相(R、S、T)とを接続するリアクトル7と、3相フルブリッジ回路6の出力側の上記直流母線3間に接続された平滑用コンデンサ8と、直流母線3間の出力電圧を検出する直流電圧検出手段9と、3相交流電源1の電源電圧位相を検出する電源電圧位相検出手段10と、各スイッチング素子4へと接続され、各スイッチング素子4を制御するパルス幅変調信号を出力するパルス幅変調手段(PWM手段)11と、を有している。パルス幅変調手段11は、電源電圧位相検出手段10により検出された電源電圧位相と直流電圧検出手段9により検出された直流母線3間の出力電圧とに基づき、各スイッチング素子4へのパルス幅変調信号を出力する。
2 発光ダイオード群
3 直流母線
4 スイッチング素子
5 逆阻止ダイオード
6 3相フルブリッジ回路
7 リアクトル
8 平滑用コンデンサ
9 直流電圧検出手段
10 電源電圧位相検出手段
11 パルス幅変調手段
12 出力電圧指令
13 電圧調整器
14 電流調整器
15 発光ダイオード
16 発光体
17 光照射装置
18 定電流回路
100 3相交流直流変換装置
Claims (12)
- 3kw以上の発光ダイオード群を1台で駆動するために3相交流電源と前記発光ダイオード群との間に設けられる電源回路に組み込まれる3相交流直流変換装置であって、
前記発光ダイオード群へと接続される直流母線と、
直列接続された一対のスイッチング素子が前記3相交流電源の3相分前記直流母線間に並列に接続されているとともに、各スイッチング素子が並列接続された逆阻止ダイオードを備えている3相フルブリッジ回路と、
該3相フルブリッジ回路と前記3相交流電源との間に設けられ、前記各一対のスイッチング素子におけるスイッチング素子間の接続部と前記3相交流電源の対応する相とを接続するリアクトルと、
前記3相フルブリッジ回路の出力側の前記直流母線間に接続された平滑用コンデンサと、
前記直流母線間の出力電圧を検出する直流電圧検出手段と、
前記3相交流電源の電源電圧位相を検出する電源電圧位相検出手段と、
前記各スイッチング素子を制御するパルス幅変調信号を出力するパルス幅変調手段と、を有し、
前記パルス幅変調手段は、前記電源電圧位相と前記直流母線間の出力電圧とに基づき、前記パルス幅変調信号を出力することを特徴とする3相交流直流変換装置。 - 前記発光ダイオード群への電流を一定に制御する定電流回路が、複数、前記3相フルブリッジ回路の出力側に並列に設けられている、請求項1に記載の3相交流直流変換装置。
- 前記直流母線間の出力電圧が100V以上であり、電圧降下が10%以下に制御される、請求項1または2に記載の3相交流直流変換装置。
- 1つの定電流回路が1アンペア以上の一定電流を制御する、請求項2または3に記載の3相交流直流変換装置。
- 請求項1~4のいずれかに記載の3相交流直流変換装置に接続された発光ダイオード群を備えた光照射装置を有することを特徴とする光化学反応装置。
- 請求項5に記載の光化学反応装置を用いることを特徴とする光化学反応方法。
- 光の照射先が液体であって、該液体の組成に少なくとも炭素原子が含まれている、請求項6に記載の光化学反応方法。
- 前記光の照射先の液体がシクロアルカンである、請求項7に記載の光化学反応方法。
- 前記シクロアルカンがシクロヘキサンまたはシクロドデカンである、請求項8に記載の光化学反応方法。
- 前記シクロアルカンと光ニトロソ化剤に光照射することによりシクロアルカノンオキシムを製造する、請求項8または9に記載の光化学反応方法。
- 前記光ニトロソ化剤が塩化ニトロシルまたはトリクロロニトロソメタンである、請求項10に記載の光化学反応方法。
- 請求項10または11に記載の光化学反応方法で製造したシクロアルカノンオキシムを用いることを特徴とするラクタムの製造方法。
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CN201580055109.8A CN106797185A (zh) | 2014-10-15 | 2015-09-18 | 三相交流直流转换装置、使用该装置的光化学反应装置、方法及内酰胺的制造方法 |
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EP3984334A1 (en) * | 2019-06-14 | 2022-04-20 | Signify Holding B.V. | An led driver control circuit |
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