CN209845398U - Variable-frequency dimmer based on double switch tubes PFC and linear inverter - Google Patents

Variable-frequency dimmer based on double switch tubes PFC and linear inverter Download PDF

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Publication number
CN209845398U
CN209845398U CN201822159708.8U CN201822159708U CN209845398U CN 209845398 U CN209845398 U CN 209845398U CN 201822159708 U CN201822159708 U CN 201822159708U CN 209845398 U CN209845398 U CN 209845398U
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China
Prior art keywords
diode
switching tube
capacitor
switch tube
cathode
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Expired - Fee Related
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CN201822159708.8U
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Chinese (zh)
Inventor
胡欲凯
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CHENGDU INTEGRID ELECTRICAL Co Ltd
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CHENGDU INTEGRID ELECTRICAL Co Ltd
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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
    • 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

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Abstract

The utility model discloses a frequency conversion light modulator based on two switch tubes PFC and a style of calligraphy dc-to-ac converter, including first inductance, two switch tube power factor correction circuit, middle electric capacity, a style of calligraphy inverter circuit, the filter circuit that connects gradually. The utility model discloses a frequency conversion dimmer based on two switch tube PFC and a style of calligraphy dc-to-ac converter can improve the power factor of input current and approach 1; the harmonic pollution of a power supply to a power grid is reduced; the energy on the intermediate capacitor can obtain standard sine wave output through inversion, is not influenced by an input power grid, and improves the output frequency, so that the volume and the weight of a needed booster transformer and a needed loop isolation transformer are greatly reduced; the output capacity is big, output voltage is high, the current harmonic is little advantage, and midpoint afterflow ability is strong, improves output ripple, reduces the loss.

Description

Variable-frequency dimmer based on double switch tubes PFC and linear inverter
Technical Field
The utility model relates to a variable frequency light modulator especially relates to variable frequency light modulator based on two switch tubes PFC and a style of calligraphy dc-to-ac converter.
Background
There are roughly two types of dimmer circuit configurations currently used in airports: a silicon controlled phase control dimmer and an IGBT high-frequency PWM sine wave dimmer.
The controllable silicon phase-control dimmer performs phase-control chopping on power frequency voltage through the controllable silicon semiconductor to adjust output, the power factor of input current is low, harmonic wave is large, reactive current needs to be increased by one time of the sectional area of a cable, and the interference and the influence of the dimmer on a power grid can be reduced only by adding a power compensation device at the time of input; the output voltage and current crest factor is large, the harmonic content is high, the service life of the navigation aid lamp can be directly influenced, and the noise of the booster transformer is very large (more than 80 dB). The frequency is the same as the power grid and is only 50Hz, so the volume and the weight of the step-up transformer and the isolation transformer are very large, for example, the weight of a 30k step-up transformer exceeds 200kg, not only the iron and the copper are wasted, the occupied machine room area is large, but also the carrying and the installation are difficult.
The high-frequency PWM dimmer can obtain a current waveform similar to a sine wave through high-frequency chopping, multiple chopping conversion in a power frequency period and high-frequency filtering input and output, has certain improvement relative to a phase control dimmer, but is greatly influenced by an input power grid, and when the harmonic content of the power grid is higher, the output waveform also contains a large amount of harmonic waves and is not a standard sine wave; and the output frequency of the transformer can only be the power grid frequency and only 50Hz, and the step-up transformer with overlarge weight and volume can not be avoided.
Both dimmers are AC/AC single-stage conversion circuits, and cannot realize the frequency conversion function.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a frequency conversion dimmer based on two switch tubes PFC and a style of calligraphy dc-to-ac converter in order to solve above-mentioned problem just.
The utility model discloses a following technical scheme realizes above-mentioned purpose: a variable-frequency dimmer based on a double-switch tube PFC and a linear inverter comprises a first inductor, a double-switch tube power factor correction circuit, an intermediate capacitor, a linear inverter circuit and a filter circuit.
The intermediate capacitor comprises a first polarity capacitor and a second polarity capacitor; the first polarity capacitor is connected in series with the second polarity capacitor.
The double-switch tube power factor correction circuit comprises a first switch tube, a second switch tube, a first diode, a second diode, a third diode and a fourth diode.
The first end of the first inductor is connected with the input end of the variable-frequency dimmer; the second end of the first inductor is connected with the anode of a first diode and the cathode of a second diode; the cathode of the first diode is connected with the anode of the third diode and the first end of the first switching tube; the cathode of the third diode is connected with the anode of the first polarity capacitor; the second end of the first switch tube is connected with the negative electrode of the first polarity capacitor, the positive electrode of the second polarity capacitor and the first end of the second switch tube; the second end of the second switching tube is connected with the anode of a second diode and the cathode of a fourth diode; and the anode of the fourth diode is connected with the cathode of the second polarity capacitor.
The linear inverter circuit comprises a fifth diode, a sixth diode, and a third switching tube, a fourth switching tube, a fifth switching tube and a sixth switching tube which are sequentially connected in series; the first end of the third switching tube is connected with the positive electrode of the first polarity capacitor; the second end of the third switching tube is connected with the cathode of the fifth diode and the first end of the fourth switching tube; the second end of the fourth switching tube is connected with the positive output end of the linear inverter circuit and the first end of the fifth switching tube; the second end of the fifth switching tube is connected with the first end of the sixth switching tube and the anode of the sixth diode; and the cathode of the sixth diode and the anode of the fifth diode are connected with the cathode of the first polarity capacitor and the negative output end of the linear inverter circuit.
The filter circuit comprises a second inductor and a filter capacitor; the positive output end of the linear inverter circuit is connected with the first end of the filter capacitor and the positive output end of the variable-frequency dimmer through a second inductor; and the second end of the filter capacitor is connected with the negative output end of the linear inverter circuit and the negative output end of the variable-frequency dimmer.
Further, the first switch tube, the second switch tube, the third switch tube, the fourth switch tube, the fifth switch tube and the sixth switch tube are all MOS tubes of reverse parallel diodes or IGBT tubes of reverse parallel diodes or fast recovery diodes.
Furthermore, the double-switch tube power factor correction circuit is a single circuit or three circuits with parallel output ends and is used for voltage frequency conversion regulation of single-phase commercial power or three-phase commercial power.
The beneficial effects of the utility model reside in that: the power factor of the input current can be improved to be close to 1; the harmonic pollution of a power supply to a power grid is reduced; the energy on the intermediate capacitor can obtain standard sine wave output through inversion, is not influenced by an input power grid, and improves the output frequency, so that the volume and the weight of a needed booster transformer and a needed loop isolation transformer are greatly reduced; the output capacity is large, the output voltage is high, the current harmonic is small, the frequency conversion adjustment is realized, the midpoint follow current capability is strong, the output ripple is improved, and the loss is reduced.
Drawings
Fig. 1 is a circuit diagram of a variable-frequency dimmer based on a dual-switch tube PFC and a linear inverter.
In the figure: q1-first switch tube; q2-second switch tube; q3-third switch tube; q4-fourth switching tube; q5-fifth switch tube; q6-sixth switching tube; d1 — first diode; d2 — second diode; d3 — third diode; d4 — fourth diode; d5-fifth diode; d6-sixth diode; l1, L2, L3-boost inductance; c1 — first polarity capacitance; c2 — second polarity capacitance; c3-inverter capacitance; a T-isolation transformer; l-navigation aid lamp.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings: as shown in fig. 1, the utility model discloses frequency conversion light modulator based on two switch tube PFC and a style of calligraphy dc-to-ac converter, including first inductance, two switch tube power factor correction circuit, middle electric capacity, a style of calligraphy inverter circuit, filter circuit.
The intermediate capacitor comprises a first polarity capacitor and a second polarity capacitor; the first polarity capacitor is connected in series with the second polarity capacitor.
The double-switch tube power factor correction circuit comprises a first switch tube, a second switch tube, a first diode, a second diode, a third diode and a fourth diode.
The first end of the first inductor is connected with the input end of the variable-frequency dimmer; the second end of the first inductor is connected with the anode of a first diode and the cathode of a second diode; the cathode of the first diode is connected with the anode of the third diode and the first end of the first switching tube; the cathode of the third diode is connected with the anode of the first polarity capacitor; the second end of the first switch tube is connected with the negative electrode of the first polarity capacitor, the positive electrode of the second polarity capacitor and the first end of the second switch tube; the second end of the second switching tube is connected with the anode of a second diode and the cathode of a fourth diode; and the anode of the fourth diode is connected with the cathode of the second polarity capacitor.
The linear inverter circuit comprises a fifth diode, a sixth diode, and a third switching tube, a fourth switching tube, a fifth switching tube and a sixth switching tube which are sequentially connected in series; the first end of the third switching tube is connected with the positive electrode of the first polarity capacitor; the second end of the third switching tube is connected with the cathode of the fifth diode and the first end of the fourth switching tube; the second end of the fourth switching tube is connected with the positive output end of the linear inverter circuit and the first end of the fifth switching tube; the second end of the fifth switching tube is connected with the first end of the sixth switching tube and the anode of the sixth diode; and the cathode of the sixth diode and the anode of the fifth diode are connected with the cathode of the first polarity capacitor and the negative output end of the linear inverter circuit.
The filter circuit comprises a second inductor and a filter capacitor; the positive output end of the linear inverter circuit is connected with the first end of the filter capacitor and the positive output end of the variable-frequency dimmer through a second inductor; and the second end of the filter capacitor is connected with the negative output end of the linear inverter circuit and the negative output end of the variable-frequency dimmer. The common node of the first polarity capacitor and the second polarity capacitor in series is a neutral point connected with a neutral line.
The first switch tube, the second switch tube, the third switch tube, the fourth switch tube, the thirteenth switch tube, the fourteenth switch tube, the fifteenth switch tube and the sixteenth switch tube are all IGBT tubes of inverse parallel diodes.
The power factor correction rectification circuit is a single circuit or three circuits and is used for voltage regulation of single-phase commercial power or three-phase commercial power:
(1) when the external network power supply is single-phase alternating-current commercial power, the first end of the boost inductor is connected with the positive input end of the power factor correction rectifying circuit, namely the live wire input end of the single-phase alternating-current commercial power;
(2) when the external network power supply is three-phase alternating current commercial power, the first ends of the three boosting inductors are respectively connected with the positive input end of the power factor correction rectification circuit, namely the live wire input end of the three-phase alternating current commercial power, the three power factor correction rectification circuits are connected in parallel, namely the positive output end and the negative output end of the three power factor correction rectification circuits are connected in parallel with the intermediate capacitor, and the serial common node of the first polarity capacitor and the second polarity capacitor is connected with the negative input end and the neutral wire of the three power factor correction rectification circuits.
The embodiment adopts three-phase alternating current commercial power input.
The soft start process of the power factor correction circuit comprises the following steps: when the three-phase commercial power works in the first-phase positive half cycle, the current charges the first-polarity capacitor through a loop formed by the first inductor, the first diode, the third diode, the first-polarity capacitor and the center line; the negative half cycle charges the second polarity capacitor through a loop formed by the center line, the second polarity capacitor, the fourth diode, the third diode and the first polarity capacitor.
When the power factor correction circuit works normally, the first switch tube is a main switch tube, and when the power factor correction circuit is conducted, the circuit stores energy in the first inductor through a loop formed by the first inductor, the first diode, the first switch tube and the center line; when the circuit is turned off, the circuit provides energy for the first polarity capacitor and the load through a loop formed by the first inductor, the first diode, the second diode, the first polarity capacitor and the neutral line.
The output end of the filter circuit is connected with the load loop through the step-up transformer. The airport navigation lamp has several serially connected navigation lamp units, and each navigation lamp unit includes isolating transformer and navigation lamp connected to the output of the isolating transformer. The primary sides of the isolation transformers are connected in series through cables.
In the linear inverter circuit, the thirteenth switch tube is a main tube, the fourteenth switch tube is an auxiliary tube, and when the main tube is conducted, the positive bus capacitor voltage, namely the first polarity capacitor voltage, supplies power to a loop formed by the thirteenth switch tube, the fourteenth switch tube, the inverter inductor, the inverter capacitor and a neutral point; when the main pipe is turned off, the inverter inductor supplies power to a loop formed by the fifth diode, the fourteenth switching tube, the inverter inductor, the inverter capacitor and the neutral point.
The technical scheme of the utility model is not limited to the restriction of above-mentioned specific embodiment, all according to the utility model discloses a technical scheme makes technical deformation, all falls into within the protection scope of the utility model.

Claims (3)

1. The variable-frequency dimmer based on the double-switch tube PFC and the linear inverter is characterized by comprising a first inductor, a double-switch tube power factor correction circuit, an intermediate capacitor, a linear inverter circuit and a filter circuit;
the intermediate capacitor comprises a first polarity capacitor and a second polarity capacitor; the first polarity capacitor is connected with the second polarity capacitor in series;
the double-switch tube power factor correction circuit comprises a first switch tube, a second switch tube, a first diode, a second diode, a third diode and a fourth diode;
the first end of the first inductor is connected with the input end of the variable-frequency dimmer; the second end of the first inductor is connected with the anode of a first diode and the cathode of a second diode; the cathode of the first diode is connected with the anode of the third diode and the first end of the first switching tube; the cathode of the third diode is connected with the anode of the first polarity capacitor; the second end of the first switch tube is connected with the negative electrode of the first polarity capacitor, the positive electrode of the second polarity capacitor and the first end of the second switch tube; the second end of the second switching tube is connected with the anode of a second diode and the cathode of a fourth diode; the anode of the fourth diode is connected with the cathode of the second polarity capacitor;
the linear inverter circuit comprises a fifth diode, a sixth diode, and a third switching tube, a fourth switching tube, a fifth switching tube and a sixth switching tube which are sequentially connected in series; the first end of the third switching tube is connected with the positive electrode of the first polarity capacitor; the second end of the third switching tube is connected with the cathode of the fifth diode and the first end of the fourth switching tube; the second end of the fourth switching tube is connected with the positive output end of the linear inverter circuit and the first end of the fifth switching tube; the second end of the fifth switching tube is connected with the first end of the sixth switching tube and the anode of the sixth diode; the cathode of the sixth diode and the anode of the fifth diode are connected with the cathode of the first polarity capacitor and the negative output end of the linear inverter circuit;
the filter circuit comprises a second inductor and a filter capacitor; the positive output end of the linear inverter circuit is connected with the first end of the filter capacitor and the positive output end of the variable-frequency dimmer through a second inductor; and the second end of the filter capacitor is connected with the negative output end of the linear inverter circuit and the negative output end of the variable-frequency dimmer.
2. The variable-frequency dimmer according to claim 1, wherein the first switching tube, the second switching tube, the third switching tube, the fourth switching tube, the fifth switching tube and the sixth switching tube are all MOS tubes of antiparallel diodes or IGBT tubes of antiparallel diodes or fast recovery diodes.
3. The PFC and in-line inverter based variable frequency dimmer of claim 1, wherein the dual-switching tube PFC circuit is a single-circuit or a three-circuit with parallel output terminals, and is adapted for voltage variable frequency regulation of single-phase or three-phase mains.
CN201822159708.8U 2018-12-21 2018-12-21 Variable-frequency dimmer based on double switch tubes PFC and linear inverter Expired - Fee Related CN209845398U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201822159708.8U CN209845398U (en) 2018-12-21 2018-12-21 Variable-frequency dimmer based on double switch tubes PFC and linear inverter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201822159708.8U CN209845398U (en) 2018-12-21 2018-12-21 Variable-frequency dimmer based on double switch tubes PFC and linear inverter

Publications (1)

Publication Number Publication Date
CN209845398U true CN209845398U (en) 2019-12-24

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201822159708.8U Expired - Fee Related CN209845398U (en) 2018-12-21 2018-12-21 Variable-frequency dimmer based on double switch tubes PFC and linear inverter

Country Status (1)

Country Link
CN (1) CN209845398U (en)

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20191224

Termination date: 20211221

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