WO2017020189A1 - Alimentation à découpage - Google Patents

Alimentation à découpage Download PDF

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Publication number
WO2017020189A1
WO2017020189A1 PCT/CN2015/085770 CN2015085770W WO2017020189A1 WO 2017020189 A1 WO2017020189 A1 WO 2017020189A1 CN 2015085770 W CN2015085770 W CN 2015085770W WO 2017020189 A1 WO2017020189 A1 WO 2017020189A1
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WO
WIPO (PCT)
Prior art keywords
diode
capacitor
output
current
passive
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PCT/CN2015/085770
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English (en)
Chinese (zh)
Inventor
陈忠
孙骁
Original Assignee
常州明石晶电科技有限公司
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Priority to PCT/CN2015/085770 priority Critical patent/WO2017020189A1/fr
Publication of WO2017020189A1 publication Critical patent/WO2017020189A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • 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
    • H02M7/06—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
    • H02M7/08—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode arranged for operation in parallel

Definitions

  • the present application relates to the field of power electronics technology, and more particularly to a switching power supply.
  • the switching mode power supply uses the pulse width modulation technique to control the ratio of the turn-on and turn-off times of the switch to regulate the output voltage or current for supplying power to different loads. Due to its high efficiency, small size and flexible control, it has been widely used in various fields.
  • the output of the switching power supply is constant voltage, keeping the output voltage constant, and its output current is determined by the load.
  • a switching power supply with a DC steady current output is required to drive the LED load.
  • a switching power supply can usually drive LED loads for multiple modules, which requires the switching power supply to provide multiple constant current outputs to drive multiple Modules.
  • the present application provides a switching power supply to solve the problem of complicated scheme and high cost in the prior art.
  • a switching power supply for constant current driving of a plurality of loads comprising:
  • a voltage conversion unit configured to receive an AC input voltage, filter and transform the AC input voltage, generate and output a high frequency AC voltage
  • the passive switch unit includes:
  • a current limiting capacitor at one end of the passive switching unit for receiving the high frequency Flowing a voltage and limiting an output current of the high frequency alternating voltage
  • a rectifying circuit connected to the other end of the current limiting capacitor for rectifying the high frequency alternating current voltage
  • a filter capacitor connected in parallel with the rectifier circuit, two parallel connection points respectively serving as an output end of the passive switch unit, wherein the filter capacitor is used for filtering the high frequency alternating current voltage to generate and output a constant current To the load connected to the phase.
  • the rectifier circuit is full-wave rectified, comprising: a first diode, a second diode, a third diode, and a fourth diode; wherein the passive switch unit is:
  • One end of the current limiting capacitor is an input end of the passive switching unit
  • the other end of the current limiting capacitor is connected to the anode of the first diode and the cathode of the third diode;
  • a cathode of the first diode is connected to a cathode of the second diode, and a connection point is connected to one end of the filter capacitor;
  • An anode of the third diode is connected to an anode of the fourth diode, and a connection point is connected to the other end of the filter capacitor;
  • Both ends of the filter capacitor are outputs of the passive switch unit
  • the anode of the second diode is connected to the cathode of the fourth diode, and the connection point is the other input terminal of the passive switching unit.
  • the rectifier circuit is half-wave rectified, comprising: a fifth diode and a sixth diode; and in the passive switch unit:
  • One end of the current limiting capacitor is a first input end of the passive switching unit
  • the other end of the current limiting capacitor is connected to the cathode of the fifth diode and the anode of the sixth diode;
  • a cathode of the sixth diode is connected to one end of the filter capacitor
  • An anode of the fifth diode is connected to another end of the filter capacitor
  • Both ends of the filter capacitor are outputs of the passive switch unit
  • a connection point of the anode of the fifth diode and the filter capacitor is a second input end of the passive switch unit.
  • the plurality of passive switch units are symmetrically connected to the output of the voltage conversion unit a first input end of each of the two symmetrically connected passive switching units is respectively connected to two output ends of the voltage conversion unit, and a second of each of the two symmetrically connected passive switching units The inputs are connected.
  • the passive switch unit further includes:
  • a seventh diode connected to the cathode of the first switching transistor and the second diode; a cathode of the seventh diode is connected to the filter capacitor;
  • control unit connected to the control end of the first switch tube; an input end of the control unit receives a reference signal;
  • a current detecting device that detects a current flowing through the load and outputs a detection signal, and an output of the current detecting device is connected to another input terminal of the control unit.
  • the passive switch unit further includes:
  • control unit connected to the control end of the first switch tube; an input end of the control unit receives a reference signal;
  • a current detecting device that detects a current flowing through the load and outputs a detection signal, and an output of the current detecting device is connected to another input terminal of the control unit.
  • the first switching transistor is a transistor, a metal-oxide semiconductor field effect transistor MOSFET or an insulated three bipolar power transistor IGBT.
  • the current detecting device is: a resistor connected in series with the load; a connection point of the resistor and the load is an output end of the current detecting device;
  • the current detecting device is: a Hall sensor connected in series with the load; an output end of the Hall sensor is an output end of the current detecting device;
  • the current detecting device is: a current transformer and a signal processing circuit; a primary winding of the current transformer is connected in series with the load, and a secondary winding of the current transformer is connected to the signal processing circuit, the signal The output of the processing circuit is the output of the current sensing device.
  • the voltage conversion unit includes a low pass filter, a PFC regulator, and a half bridge resonant circuit that are sequentially connected in series.
  • the low pass filter is an EMI filter.
  • the PFC regulator includes: a bridge rectifier bridge, a first inductor, a second switch transistor, an eighth diode, a third capacitor, and a fourth capacitor; wherein:
  • the input end of the bridge rectifier bridge is an input end of the PFC regulator
  • One end of the first inductor is connected to an output end of the bridge rectifier bridge; the other end of the first inductor is connected to an input end of the second switch tube and an anode of the eighth diode; The output end of the second switch tube is grounded;
  • the third capacitor and the fourth capacitor are connected in series between the cathode of the eighth diode and the ground; the two ends of the series branch of the third capacitor and the fourth capacitor are the PFC The output of the regulator.
  • the half bridge resonant circuit comprises: a third switch tube, a fourth switch tube, a second inductor, a fifth capacitor and a transformer; wherein:
  • the input end of the third switch tube is an input end of the half bridge resonant circuit
  • the second inductor is connected between the output end of the third switch tube and the input end of the fourth switch tube; the output end of the fourth switch tube is grounded;
  • One end of the fifth capacitor is connected to a midpoint of the second inductor and a different end of the transformer primary winding; the other end of the fifth capacitor is opposite to the third capacitor and the fourth capacitor
  • the series connection point is connected to the same name end of the primary winding of the transformer;
  • the two ends of the secondary winding of the transformer are respectively the output ends of the half bridge resonant circuit.
  • the half bridge resonant circuit comprises: a third switch tube, a fourth switch tube, a third inductor, a fifth capacitor and a transformer; wherein:
  • the same name end of the first coil of the third inductor is an input end of the half bridge resonant circuit
  • An input end of the third switch tube is connected to a different end of the first coil of the third inductor
  • An output end of the third switch tube is connected to an input end of the fourth switch tube
  • An output end of the fourth switch tube is connected to a same end of the second coil of the third inductor; a different end of the second coil of the third inductor is grounded;
  • One end of the fifth capacitor is connected to an output end of the third switch tube, an input end of the fourth switch tube, and a different name end of the primary winding of the transformer; the other end of the fifth capacitor is Connecting a series connection point of the third capacitor and the fourth capacitor to a terminal of the same name of the primary winding of the transformer;
  • the two ends of the secondary winding of the transformer are respectively the output ends of the half bridge resonant circuit.
  • the switching power supply receives the AC input voltage through the voltage conversion unit, filters and transforms the AC input voltage, generates and outputs a high frequency AC voltage, and receives the above through a plurality of passive switch units. a high-frequency alternating voltage, and rectifying and filtering the high-frequency alternating current voltage to generate a constant current and outputting to a plurality of loads respectively; wherein the passive switching unit only passes through a current limiting capacitor, a rectifier circuit, and a filter capacitor
  • the passive device can realize independent constant current driving for a plurality of the loads, and the system is simple and cost-effective compared to the prior art that realizes multi-channel constant current driving through an AC-DC converter and a multi-channel DC-DC converter. low.
  • FIG. 1 is a schematic structural view of a switching power supply provided by the present application.
  • FIG. 2 is a schematic structural diagram of another switching power supply provided by the present application.
  • FIG. 3 is a schematic structural diagram of another switching power supply provided by the present application.
  • FIG. 4 is a schematic structural connection diagram of a switching power supply provided by the present application.
  • FIG. 5 is a schematic diagram of power supply of a switching power supply provided by the present application.
  • FIG. 6 is a schematic diagram of power supply of another switching power supply provided by the present application.
  • FIG. 7 is a circuit diagram of a passive switch unit provided by the present application.
  • FIG. 8 is a circuit diagram of another passive switch unit provided by the present application.
  • FIG. 9 is a schematic structural diagram of a voltage conversion unit provided by the present application.
  • FIG. 10 is a schematic structural diagram of a voltage conversion unit provided by the present application.
  • the present application provides a switching power supply that is applied to constant current driving of a plurality of loads to solve the problems of the complicated scheme and high cost in the prior art.
  • the switching power supply includes:
  • a plurality of passive switching units 102 each connected to an output end of the voltage converting unit 101, and an output end of a passive switching unit 102 is correspondingly connected to one of the loads;
  • the passive switch unit 102 includes:
  • One end is a current limiting capacitor of one input end of the passive switching unit 102;
  • a filter capacitor connected in parallel with the rectifier circuit has two connection points connected in parallel as an output end of the passive switch unit.
  • the voltage conversion unit 101 receives an AC input voltage, filters and transforms the AC input voltage, generates and outputs a high frequency AC voltage;
  • the current limiting capacitor is configured to receive the high frequency alternating current voltage and limit an output current of the high frequency alternating current voltage;
  • the rectifier circuit is configured to perform the high frequency alternating current voltage The rectifying capacitor is configured to filter the high frequency alternating current voltage to generate and output a constant current to the connected load.
  • the plurality of passive switching units 102 respectively receive the high-frequency alternating voltage, and after rectifying and filtering the high-frequency alternating voltage, generate and output a constant current to the connected load.
  • the current limiting capacitor, the rectifier circuit and the filter capacitor included in the passive switch unit 102 are passive devices.
  • the switching power supply of the embodiment obtains a high-frequency AC voltage through the voltage conversion unit 101; then, the passive components of the plurality of passive switching units 102 pass only the current limiting capacitor, the rectifier circuit, and the filter capacitor.
  • Independent constant current driving for a plurality of said loads can be realized, and the system is simple and low in cost compared to the prior art in which multi-channel constant current driving is realized by an AC-DC converter and a multi-channel DC-DC converter.
  • the passive switch unit 102 may also be one; through the current limiting capacitor, the rectifier circuit, and the The filter capacitor can also implement constant current driving for the load; the number of the passive switch units 102 depends on the number of the loads to be driven, and is not specifically limited herein, and is protected in the present application. Within the scope.
  • the rectifier circuit in the passive switch unit 102 is full-wave rectified, including: a first diode D1, a second diode D2, a third diode D3, and a fourth Diode D4; in the passive switch unit 102:
  • One end of the current limiting capacitor C1 is an input end of the passive switching unit 102;
  • the other end of the current limiting capacitor C1 is connected to the anode of the first diode D1 and the cathode of the third diode D3;
  • the cathode of the first diode D1 is connected to the cathode of the second diode D2, and the connection point is connected to one end of the filter capacitor C2;
  • the anode of the third diode D3 is connected to the anode of the fourth diode D4, and the connection point is connected to the other end of the filter capacitor C2;
  • Both ends of the filter capacitor C2 are the output ends of the passive switch unit 102;
  • the anode of the second diode D2 is connected to the cathode of the fourth diode D4, and the connection point is the other input terminal of the passive switching unit 102.
  • the filter capacitor C2 is used to filter out high frequency components of the high frequency alternating voltage, so that the load obtains a smooth direct current.
  • the high frequency alternating current voltage received by the passive switching unit 102 is U TS
  • the constant current flowing through the load is I L
  • the load voltage is U L + ⁇ U L
  • ⁇ U L is the voltage change caused by different loads, ignoring the conduction voltage drop of the diode.
  • the capacitive reactance of the current limiting capacitor C1 is Z C1 , and the following relationship can be obtained:
  • the constant current flowing through the load is I L and can be kept substantially constant.
  • the rectifier circuit is half-wave rectified, comprising: a fifth diode D5 and a sixth diode D6; and in the passive switch unit 102:
  • One end of the current limiting capacitor C1 is a first input end of the passive switching unit 102;
  • the other end of the current limiting capacitor C1 is connected to the cathode of the fifth diode D5 and the anode of the sixth diode D6;
  • a cathode of the sixth diode D6 is connected to one end of the filter capacitor C2;
  • the anode of the fifth diode D5 is connected to the other end of the filter capacitor C2;
  • Both ends of the filter capacitor C2 are the output ends of the passive switch unit 102;
  • the junction of the anode of the fifth diode D5 and the filter capacitor C2 is the second input of the passive switch unit 102.
  • the passive switching unit 102 When the high frequency alternating current voltage received by the passive switching unit 102 is a positive half cycle of the signal, current flows through the current limiting capacitor C1 and the sixth diode D6 to supply power to the load. When the high frequency switching power supply received by the passive switching unit 102 is a signal negative half cycle, the current flows through the fifth diode D5 and the current limiting capacitor C1, and does not pass the load, and is a reactive current.
  • the load is powered by a filter capacitor C2.
  • the filter capacitor C2 is used to filter out high frequency components of the high frequency alternating voltage, so that the load obtains a smooth direct current.
  • the high-frequency AC voltage is received by a passive switching unit 102 is U TS
  • the constant current flowing through the load is I L
  • ⁇ U L is the voltage change caused by different loads, ignoring the conduction voltage drop of the diode.
  • the capacitive reactance of the current limiting capacitor C1 is Z C1 , and the following relationship can be obtained:
  • the 2 of the denominator part of the formula is due to the fact that only a positive half cycle of current is supplied to the load terminal in the half wave rectification mode.
  • the constant current flowing through the load is I L and can be kept substantially constant.
  • a plurality of passive switch units 102 are symmetrically connected to the output end of the voltage conversion unit 101; wherein, each of the two symmetrically connected passive switch units 102 An input terminal is connected to the two output terminals of the voltage conversion unit 101, and the second input terminals of each of the two symmetrically connected passive switch units 102 are connected.
  • the load 1 and the load 2 are connected in a symmetrical structure to the output of the voltage conversion unit 101.
  • the high frequency alternating current voltage is a positive half cycle
  • the current flows through the loop as shown in FIG. 5, and the current limiting capacitor C1 and the sixth diode D6 in the passive switching unit 102 connected to the load 1 are The load 1 is powered.
  • the high frequency alternating current voltage is negative half cycle
  • the current passes through as shown in FIG. A loop through which the current limiting capacitor C1 and the sixth diode D6 in the passive switching unit 102 connected to the load 2 supplies power to the load 2.
  • the reactive current can be greatly reduced, and in the case where the load 1 and the load 2 are equal, there is no reactive current in the loop.
  • the passive switching unit 102 when the rectifying circuit in the passive switching unit 102 is full-wave rectification, on the basis of FIG. 2, the passive switching unit 102, as shown in FIG. 7, further includes:
  • a seventh diode D7 whose anode is connected to the cathodes of the first switching transistor S1 and the second diode D2; a cathode of the seventh diode D7 is connected to the filter capacitor C2;
  • control unit 200 whose output is connected to the control end of the first switch S1; an input of the control unit 200 receives a reference signal;
  • a current detecting device 300 that detects a current flowing through the load and outputs a detection signal, and an output of the current detecting device 300 is connected to another input terminal of the control unit 200.
  • the passive switching unit 102 when the rectifying circuit in the passive switching unit 102 is half-wave rectified, on the basis of FIG. 3, the passive switching unit 102 is as shown in FIG.
  • control unit 200 whose output is connected to the control end of the first switch S1; an input of the control unit 200 receives a reference signal;
  • a current detecting device 300 that detects a current flowing through the load and outputs a detection signal, and an output of the current detecting device 300 is connected to another input terminal of the control unit 200.
  • the first switch S1 may be a transistor, a MOSFET or an IGBT.
  • an active switch can be further added to each of the passive switching units 102 to adjust the current, as shown in FIG. 7 or FIG.
  • an active switching device first switching transistor S1
  • first switching transistor S1 is connected in parallel after the current limiting capacitor C1, and when the first switching transistor S1 is turned off, current flows into the load normally.
  • the first switch S1 is closed, the current directly returns to the output end of the voltage conversion unit 101 through the first switch S1, and becomes a reactive current. Therefore, the ratio of the active and reactive power of the current flowing from the output terminal of the voltage converting unit 101 can be controlled by adjusting the ratio of the opening and closing of the first switching transistor S1.
  • the current detecting device 300 may be: a resistor connected in series with the load; a connection point of the resistor and the load is an output end of the current detecting device 300;
  • an output end of the Hall sensor is an output end of the current detecting device 300;
  • a current transformer and a signal processing circuit a primary winding of the current transformer is connected in series with the load, a secondary winding of the current transformer is connected to the signal processing circuit, and an output end of the signal processing circuit It is the output of the current detecting device 300.
  • the current detecting device 300 is connected in series with the load for detecting a current flowing through the load and outputting a detection signal; however, the position of the current detecting device 300 is not limited to the circuit in which the load is located, and may be the sixth and second The pole tube D6 or the seventh diode D7 are connected in series as long as the current signal flowing through the load can be detected and converted into a signal that the control unit 200 can receive.
  • control unit 200 controls the turn-on duty ratio of the first switch S1 by pulse width modulation (PWM) through the negative feedback control, so that the current on the load can reach a preset value, and thus is caused by different loads. Accurate control of the current flowing through the load is achieved with a large voltage change ⁇ U L , maintaining a constant current output.
  • PWM pulse width modulation
  • Another embodiment of the present invention further provides another switching power supply, as shown in FIG. 1, comprising:
  • a plurality of passive switching units 102 the input ends of the plurality of passive switching units 102 are connected to the output end of the voltage converting unit 101, and the output end of a passive switching unit 102 is connected to one of the loads;
  • the passive switch unit 102 includes a current limiting capacitor, a rectifier circuit, and a filter capacitor.
  • a current limiting capacitor for a specific implementation, refer to any of the above embodiments.
  • the voltage conversion unit 101 includes a low pass filter 111, a PFC regulator 112, and a half bridge resonance circuit 113 which are sequentially connected in series.
  • the low pass filter 111 is an EMI filter.
  • the PFC regulator 112 includes: a bridge rectifier bridge, a first inductor L1, a second switch transistor Q2, a seventh diode D7, a third capacitor C3, and a fourth capacitor C4; wherein:
  • the input end of the bridge rectifier bridge is an input end of the PFC regulator 112;
  • One end of the first inductor L1 is connected to the output end of the bridge rectifier bridge; the other end of the first inductor L1 is connected to the input end of the second switch tube Q2 and the anode of the seventh diode D7; the second switch tube Q2 The output is grounded;
  • the third capacitor C3 and the fourth capacitor C4 are connected in series between the cathode of the seventh diode D7 and the ground; the two ends of the series branch of the third capacitor C3 and the fourth capacitor C4 are the output ends of the PFC regulator 112. .
  • the half bridge resonant circuit 113 includes: a third switching transistor Q3, a fourth switching transistor Q4, a second inductor L2, a fifth capacitor C5, and a transformer T; wherein:
  • the input end of the third switching transistor Q3 is an input end of the half bridge resonant circuit 113;
  • the second inductor L2 is connected between the output end of the third switch tube Q3 and the input end of the fourth switch tube Q4; the output end of the fourth switch tube Q4 is grounded;
  • One end of the fifth capacitor C5 is connected to the midpoint of the second inductor L2 and the different end of the transformer T primary winding; the other end of the fifth capacitor C5 is connected to the series connection point of the third capacitor C3 and the fourth capacitor C4 and the transformer T The same name end of the primary winding is connected;
  • Both ends of the secondary winding of the transformer T are respectively the output ends of the half bridge resonant circuit 113.
  • the boost circuit consists of the first inductor L1, the seventh diode D7 and the second switch transistor Q2, and the third capacitor C3 and the fourth capacitor A DC voltage of about 400V is generated across the capacitor C4 (two electrolytic capacitors).
  • the third switch tube Q3 and the fourth switch tube Q4 form a half bridge circuit, and the fifth capacitor C5 and the transformer T constitute an LC resonance network, and the high frequency AC voltage is isolated and output on the secondary side of the transformer T. Due to the presence of the second inductance L2, the output characteristics of the half bridge circuit are close to the current source.
  • the frequency of the high-frequency AC voltage output by the transformer T is determined by the switching frequency of the third switching transistor Q3 and the fourth switching transistor Q4.
  • control signal of the second switching transistor Q2 may be from L6562 as shown in FIG. 9, that is, the internal signal of the PFC regulator 112; the control signals of the third switching transistor Q3 and the fourth switching transistor Q4.
  • the auxiliary winding may be from the second inductor L2.
  • the half bridge resonant circuit 113 includes: a third switching transistor Q3, a fourth switching transistor Q4, a third inductor, a fifth capacitor C5, and a transformer T; wherein:
  • the same name end of the first coil L3-1 of the third inductor is an input end of the half bridge resonant circuit 113;
  • the input end of the third switch tube Q3 is connected to the different end of the first coil L3-1 of the third inductor;
  • the output end of the third switch tube Q3 is connected to the input end of the fourth switch tube Q4;
  • the output end of the fourth switch tube Q4 is connected to the same end of the second coil L3-2 of the third inductor; the second end of the second inductor L3-2 of the third inductor is grounded;
  • One end of the fifth capacitor C5 is connected to the output end of the third switch tube Q3, the input end of the fourth switch tube Q4, and the different end of the transformer T primary winding; the other end of the fifth capacitor C5 and the third capacitor C3 and the The series connection point of the four capacitor C4 is connected to the same name end of the primary winding of the transformer T;
  • Both ends of the secondary winding of the transformer T are respectively the output ends of the half bridge resonant circuit 113.
  • the specific implementation form of the voltage conversion unit 101 is not specifically limited, as long as it can receive and filter and convert the AC input voltage, and generate and output the high-frequency AC voltage, which may be determined according to the application environment. Within the scope of protection of this application.

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Abstract

Une alimentation à découpage est conçue pour : recevoir, par l'intermédiaire d'une unité de conversion de tension (101), une tension d'entrée alternative, filtrer et convertir la tension d'entrée alternative, et générer une tension alternative haute fréquence et la fournir en sortie ; recevoir ensuite, par l'intermédiaire d'une pluralité d'unités de commutation passives (102), la tension alternative haute fréquence, redresser et filtrer la tension alternative haute fréquence, générer un courant constant et l'envoyer à une pluralité de charges ; lesquelles unités de commutation passives (102) utilisent uniquement des composants passifs tels qu'un condensateur limiteur de courant (C1), un circuit redresseur, et un condensateur de filtrage (C2) pour amener le courant constant indépendant à circuler vers la pluralité de charges. En comparaison à la commande d'une pluralité de courants constants par l'intermédiaire d'un bloc d'alimentation externe et d'une pluralité de convertisseurs continu-continu selon l'état de la technique, le mode de réalisation selon l'invention présente une structure de système simple et un faible coût.
PCT/CN2015/085770 2015-07-31 2015-07-31 Alimentation à découpage WO2017020189A1 (fr)

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CN112770444A (zh) * 2021-01-29 2021-05-07 漳州立达信光电子科技有限公司 全周期负载驱动系统
CN112782605A (zh) * 2020-12-29 2021-05-11 深圳己道科技有限公司 高频高压信号电压电流的幅值及相位隔离检测电路
CN113179568A (zh) * 2021-04-09 2021-07-27 深圳市立创普电源技术有限公司 一种多输出恒流控制电路及驱动电源
CN113709941A (zh) * 2021-09-09 2021-11-26 深圳市优仕拓科技有限公司 一种高pf值非隔离多路智能电源的电路
CN113867303A (zh) * 2021-10-25 2021-12-31 杭州和利时自动化有限公司 一种io通道电路及dcs系统
CN114200202A (zh) * 2021-12-09 2022-03-18 华立科技股份有限公司 一种计量电路及其取电方法和介质
CN114614769A (zh) * 2022-03-10 2022-06-10 哈工大机器人（合肥）国际创新研究院 一种大功率射频谐振发生装置
CN116470733A (zh) * 2023-06-15 2023-07-21 捷蒽迪电子科技(上海)有限公司 一种新型输入电压采集电路

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CN107656119B (zh) * 2017-10-23 2023-10-03 浙江大学 一种无源无线的电流传感器装置
CN107579664A (zh) * 2017-10-27 2018-01-12 桂林狮达机电技术工程有限公司 电子束连续焊接设备llc谐振逆变高压电源及控制方法
CN107579664B (zh) * 2017-10-27 2023-08-18 桂林狮达技术股份有限公司 电子束连续焊接设备llc谐振逆变高压电源及控制方法
CN109788603B (zh) * 2017-11-15 2024-03-15 广东金莱特电器股份有限公司 电源电路及其照明设备
CN109788603A (zh) * 2017-11-15 2019-05-21 广东金莱特电器股份有限公司 电源电路及其照明设备
TWI719400B (zh) * 2018-02-07 2021-02-21 德商伍爾特電子ｅｉＳｏｓ有限公司 獲取電能的裝置以及具有這種裝置的能量發生器
US11146105B2 (en) 2018-02-07 2021-10-12 Würth Elektronik eiSos Gmbh & Co. KG Device for obtaining electric energy and energy generator comprising such a device
CN109168226A (zh) * 2018-10-25 2019-01-08 英飞特电子（杭州）股份有限公司 一种led调节方法及电路
CN109286236A (zh) * 2018-11-16 2019-01-29 深圳众城卓越科技有限公司 风电变桨系统的控制单元的供电电路
CN109286236B (zh) * 2018-11-16 2024-05-07 深圳众城卓越科技有限公司 风电变桨系统的控制单元的供电电路
CN110061508A (zh) * 2019-04-24 2019-07-26 广西云涌科技有限公司 一种低能耗节能型旁路无级调压装置
CN110061508B (zh) * 2019-04-24 2023-10-10 广西云涌科技有限公司 一种旁路无级调压装置
CN112152582A (zh) * 2020-08-25 2020-12-29 中山市博顿光电科技有限公司 离子源驱动电源的滤波电路及其滤波参数检测方法和装置
CN112152582B (zh) * 2020-08-25 2024-05-14 中山市博顿光电科技有限公司 离子源驱动电源的滤波电路及其滤波参数检测方法和装置
CN112653437B (zh) * 2020-12-09 2024-02-13 厦门大学 一种无延时开关电路、开关及超声波损伤诊断和检测设备
CN112653437A (zh) * 2020-12-09 2021-04-13 厦门大学 一种无延时开关电路、开关及超声波损伤诊断和检测设备
CN112564503A (zh) * 2020-12-22 2021-03-26 杭州临安志达电子科技有限公司 一种分立元器件组合式安全型低压暖桌宝发热垫电源
CN112782605B (zh) * 2020-12-29 2024-03-22 深圳己道科技有限公司 高频高压信号电压电流的幅值及相位隔离检测电路
CN112782605A (zh) * 2020-12-29 2021-05-11 深圳己道科技有限公司 高频高压信号电压电流的幅值及相位隔离检测电路
CN112770444B (zh) * 2021-01-29 2023-03-14 漳州立达信光电子科技有限公司 全周期负载驱动系统
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