WO2022068566A1 - 电子电路和空调器 - Google Patents

电子电路和空调器 Download PDF

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Publication number
WO2022068566A1
WO2022068566A1 PCT/CN2021/118018 CN2021118018W WO2022068566A1 WO 2022068566 A1 WO2022068566 A1 WO 2022068566A1 CN 2021118018 W CN2021118018 W CN 2021118018W WO 2022068566 A1 WO2022068566 A1 WO 2022068566A1
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WIPO (PCT)
Prior art keywords
fan
load
parallel
capacitor
module
Prior art date
Application number
PCT/CN2021/118018
Other languages
English (en)
French (fr)
Inventor
黄招彬
龙谭
赵鸣
杨建宁
徐锦清
曾贤杰
霍兆镜
文先仕
Original Assignee
重庆美的制冷设备有限公司
广东美的制冷设备有限公司
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
Priority claimed from CN202022223541.4U external-priority patent/CN212305171U/zh
Priority claimed from CN202011063267.7A external-priority patent/CN114337328A/zh
Application filed by 重庆美的制冷设备有限公司, 广东美的制冷设备有限公司 filed Critical 重庆美的制冷设备有限公司
Priority to US18/016,277 priority Critical patent/US20230275525A1/en
Priority to EP21874227.8A priority patent/EP4178098A4/en
Publication of WO2022068566A1 publication Critical patent/WO2022068566A1/zh

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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
    • H02M7/12—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
    • 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
    • H02M7/219—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 bridge configuration
    • 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
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
    • H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
    • H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
    • H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • 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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
    • H02M1/008—Plural converter units for generating at two or more independent and non-parallel outputs, e.g. systems with plural point of load switching regulators
    • 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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
    • H02M1/4208—Arrangements for improving power factor of AC input
    • H02M1/4216—Arrangements for improving power factor of AC input operating from a three-phase input voltage
    • 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
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
    • H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
    • H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
    • H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M5/4585—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only having a rectifier with controlled elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/88—Electrical aspects, e.g. circuits
    • 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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/12—Arrangements for reducing harmonics from ac input or output

Definitions

  • the present disclosure relates to the technical field of electronic circuits, and in particular, to an electronic circuit and an air conditioner.
  • the three-phase power supply passes through a passive PFC (Power Factor Correction, power factor correction) rectifier circuit or a two-level active PFC rectifier circuit to output a high-voltage DC bus voltage, and the inverter compressor load is connected to the high-voltage DC.
  • the IPM Intelligent Power Module
  • the DC fan load or auxiliary power supply does not change from the high-voltage DC bus voltage.
  • the power is taken from the top, but the power is supplied through an independent one-way phase voltage rectification.
  • the load that drives the DC fan or the auxiliary power supply phase will be higher than the other two phases, and the added load does not pass through the two-level active PFC circuit, resulting in higher current harmonics in this phase.
  • the three-phase current is unbalanced, and it is difficult to meet the harmonic requirements of IEC (International Electrotechnical Commission).
  • the present disclosure aims to at least partially solve one of the technical problems existing in the prior art. To this end, the present disclosure proposes an electronic circuit and an air conditioner that can provide stable voltage, balance three-phase currents, and effectively reduce harmonics.
  • the rectifier module includes a three-phase rectifier bridge and a two-way switch assembly, the three-phase rectifier bridge includes a first bridge arm, a second bridge arm and a third bridge arm that are connected in parallel;
  • the two-way switch assembly includes a first bridge arm, a second bridge arm and a third bridge arm A bidirectional switch, a second bidirectional switch and a third bidirectional switch, one end of the first bidirectional switch is connected to the midpoint of the first bridge arm, and one end of the second bidirectional switch is connected to the midpoint of the second bridge arm , one end of the third bidirectional switch is connected to the midpoint of the third bridge arm;
  • the energy storage module is connected to the DC output end of the rectifier module, the energy storage module includes two capacitors connected in series with each other, the other end of the first bidirectional switch, the other end of the second bidirectional switch The other end and the other end of the third bidirectional switch are both connected between the two capacitors;
  • At least one of the capacitors is connected in parallel with a DC load.
  • the electronic circuit according to the embodiment of the present disclosure has at least the following beneficial effects: the electronic circuit of the embodiment of the present disclosure is provided with a rectifier module and an energy storage module, wherein the energy storage module includes two capacitors connected in series, and the embodiment of the present disclosure will
  • the DC load with low withstand voltage such as DC fan load or auxiliary power supply is connected in parallel to the capacitor in the energy storage module, and then the capacitor in the energy storage module can supply power to the DC fan load or auxiliary power supply with low withstand voltage performance. It can also balance the three-phase current of the three-phase AC power supply, avoid the harmonic current of a certain phase being significantly larger, and can effectively reduce the harmonic.
  • the DC output terminal includes a positive bus terminal and a negative bus terminal
  • the two capacitors are respectively a first capacitor and a second capacitor
  • the positive bus terminal sequentially passes through the first capacitor and the second capacitor.
  • the second capacitor is connected to the negative bus terminal.
  • a first DC load is connected in parallel with the first capacitor, the first DC load includes a first auxiliary power module and/or a first fan module, and the first fan module includes a first DC load.
  • a DC fan and a first drive assembly for driving the first DC fan, the first drive assembly is connected in parallel to the first capacitor.
  • the second capacitor is connected in parallel with a second DC load
  • the second DC load includes a second auxiliary power module and/or a second fan module
  • the second fan module includes a second DC A fan and a second drive assembly for driving the second DC fan, the second drive assembly is connected in parallel to the second capacitor.
  • a first DC load is connected in parallel with the first capacitor, and a second DC load is connected in parallel with the second capacitor;
  • the first DC load includes a first auxiliary power module and/or a second DC load.
  • a fan module the first fan module includes a first DC fan and a first drive assembly for driving the first DC fan, the first drive assembly is connected in parallel to the first capacitor;
  • the two DC loads include a second auxiliary power module and/or a second fan module, the second fan module includes a second DC fan and a second drive assembly for driving the second DC fan, the second drive assembly connected in parallel to the second capacitor.
  • a third DC load is further included, the third DC load is connected to the DC output terminal.
  • the third DC load includes a compressor and a third drive assembly for driving the compressor, the third drive assembly being connected to the DC output.
  • an AC input terminal and an inductive device are further included, and the AC input terminal is connected to the rectifier module through the inductive device.
  • the AC input terminal includes a first-phase input terminal, a second-phase input terminal, and a third-phase input terminal
  • the inductive device includes a first inductance, a second inductance, and a third inductance
  • the first phase input terminal is connected to the midpoint of the first bridge arm through the first inductance
  • the second phase input terminal is connected to the midpoint of the second bridge arm through the second inductance
  • the third phase input terminal is connected to the midpoint of the third bridge arm through the third inductor.
  • the first bidirectional switch, the second bidirectional switch, and the third bidirectional switch each include two antiparallel power switch tubes.
  • the first bidirectional switch, the second bidirectional switch, and the third bidirectional switch each include two power switch tubes connected in reverse series, and the two power switch tubes are reversed. A diode is connected in parallel.
  • the first bidirectional switch, the second bidirectional switch, and the third bidirectional switch all include a fourth bridge arm, a power switch tube, and a fifth bridge arm connected in parallel with each other.
  • An air conditioner according to an embodiment of the second aspect of the present disclosure includes the electronic circuit described in the above-mentioned first aspect.
  • the air conditioner according to the embodiment of the present disclosure has at least the following beneficial effects: the air conditioner according to the embodiment of the present disclosure includes the electronic circuit described in the first aspect, and the electronic circuit is provided with a rectifier module and an energy storage module, wherein the energy storage module There are two capacitors connected in series, and in the embodiment of the present disclosure, a DC load with a low withstand voltage performance such as a DC fan load or an auxiliary power supply is connected in parallel to the capacitor in the energy storage module, and then the capacitor in the energy storage module can supply power to the capacitor.
  • a DC load with a low withstand voltage performance such as a DC fan load or an auxiliary power supply
  • FIG. 1 is a topology diagram of a three-phase passive PFC circuit with an auxiliary power supply and two DC fan loads in the prior art
  • Fig. 2 is a two-level active PFC circuit topology diagram with auxiliary power supply and two DC fan loads in the prior art
  • Fig. 3 is a T-type three-level active PFC circuit topology diagram with auxiliary power supply and two DC fan loads in the prior art
  • FIG. 4 is a topology diagram of a T-type three-level active PFC circuit provided by an embodiment of the present disclosure when a DC load is connected in parallel to the upper half bus;
  • FIG. 5 is a topology diagram of a T-type three-level active PFC circuit provided by another embodiment of the present disclosure when a DC load is connected in parallel to the upper half bus;
  • FIG. 6 is a topology diagram of a T-type three-level active PFC circuit provided by another embodiment of the present disclosure when a DC load is connected in parallel to the upper half bus;
  • FIG. 7 is a topology diagram of a T-type three-level active PFC circuit provided by another embodiment of the present disclosure when a DC load is connected in parallel to the upper half bus;
  • FIG. 8 is a topology diagram of a T-type three-level active PFC circuit provided by another embodiment of the present disclosure when a DC load is connected in parallel to the upper half bus;
  • FIG. 9 is a topology diagram of a T-type three-level active PFC circuit provided by another embodiment of the present disclosure when a DC load is connected in parallel to the upper half bus;
  • FIG. 10 is a topology diagram of a T-type three-level active PFC circuit provided by an embodiment of the present disclosure when a DC load is connected in parallel to the lower half bus;
  • FIG. 11 is a topology diagram of a T-type three-level active PFC circuit provided by another embodiment of the present disclosure when a DC load is connected in parallel to the lower half bus;
  • FIG. 12 is a topology diagram of a T-type three-level active PFC circuit provided by another embodiment of the present disclosure when a DC load is connected in parallel to the lower half bus;
  • FIG. 13 is a topology diagram of a T-type three-level active PFC circuit provided by another embodiment of the present disclosure when a DC load is connected in parallel to the lower half bus;
  • FIG. 14 is a topology diagram of a T-type three-level active PFC circuit provided by another embodiment of the present disclosure when a DC load is connected in parallel to the lower half bus;
  • FIG. 15 is a topology diagram of a T-type three-level active PFC circuit provided by another embodiment of the present disclosure when a DC load is connected in parallel to the lower half bus;
  • 16 is a topology diagram of a T-type three-level active PFC circuit provided by an embodiment of the present disclosure when a DC load is connected in parallel to the upper half bus bar and the lower half bus bar respectively;
  • 17 is a topology diagram of a T-type three-level active PFC circuit provided by another embodiment of the present disclosure when a DC load is connected in parallel to the upper half bus bar and the lower half bus bar respectively;
  • FIG. 18 is a topology diagram of a T-type three-level active PFC circuit provided by another embodiment of the present disclosure when a DC load is connected in parallel to the upper half bus bar and the lower half bus bar respectively;
  • Figure 19 is a topology diagram of a T-type three-level active PFC circuit provided by another embodiment of the present disclosure when a DC load is connected in parallel to the upper half bus bar and the lower half bus bar respectively;
  • FIG. 20 is a topology diagram of a T-type three-level active PFC circuit provided by another embodiment of the present disclosure when a DC load is connected in parallel to the upper half bus bar and the lower half bus bar respectively;
  • 21 is a topology diagram of a T-type three-level active PFC circuit provided by another embodiment of the present disclosure when a DC load is connected in parallel to the upper half bus bar and the lower half bus bar respectively;
  • FIG. 22 is a topology diagram of a T-type three-level active PFC circuit provided by another embodiment of the present disclosure when a DC load is connected in parallel to the upper half bus bar and the lower half bus bar respectively;
  • FIG. 23 is a topology diagram of a T-type three-level active PFC circuit provided by another embodiment of the present disclosure when a DC load is connected in parallel to the upper half bus bar and the lower half bus bar respectively;
  • FIG. 24 is a schematic structural diagram of a first bidirectional switch, a second bidirectional switch, and a third bidirectional switch according to an embodiment of the present disclosure
  • FIG. 25 is a schematic structural diagram of a first bidirectional switch, a second bidirectional switch, and a third bidirectional switch according to another embodiment of the present disclosure.
  • FIG. 26 is a schematic structural diagram of a first bidirectional switch, a second bidirectional switch, and a third bidirectional switch according to another embodiment of the present disclosure.
  • the meaning of several is one or more, the meaning of multiple is two or more, greater than, less than, exceeding, etc. are understood as not including this number, above, below, within, etc. are understood as including this number. If it is described that the first and the second are only for the purpose of distinguishing technical features, it cannot be understood as indicating or implying relative importance, or indicating the number of the indicated technical features or the order of the indicated technical features. relation.
  • a DC fan load or auxiliary power supply is also provided.
  • Some air conditioner systems are equipped with a DC fan, and some air conditioners The system is set up with two DC fans or even more.
  • the prior art scheme is generally as follows: the three-phase power supply outputs the high-voltage DC bus voltage after passing through a passive PFC rectifier circuit or a two-level active PFC rectifier circuit, and the inverter compressor load is connected to the high-voltage DC bus voltage; and the DC fan load and auxiliary The power supply is not taken from the high-voltage DC bus voltage, but is rectified through another independent channel of phase voltage to supply power.
  • the reason for this design is that the withstand voltage of the auxiliary power supply and the IPM module used to drive the DC fan is not enough to directly draw power from the high-voltage DC bus.
  • the nominal effective value of the three-phase line voltage is 380V, then the rectified high-voltage DC bus voltage is 537V; if the allowable error of 10% power supply voltage fluctuation is added, the high-voltage DC bus voltage may reach 590V; source PFC control, the DC bus voltage can be further increased.
  • the withstand voltage of high-voltage electrolytic capacitors is generally below 450V. In this application scenario, the high-voltage electrolytic capacitors of the DC bus must use a two-stage series connection to increase the withstand voltage, and the two-stage series series withstand voltage can theoretically reach 900V.
  • the withstand voltage of the IPM module used to drive the DC fan is generally 500V or 600V.
  • the input voltage of the IPM module used to drive the DC fan is generally below 450V. Since the voltage of the high-voltage DC bus is higher than the input voltage requirement of the IPM module used to drive the DC fan, the IPM module cannot directly draw power from the high-voltage DC bus.
  • the DC input voltage of the auxiliary power supply in the air conditioning system is also required to be below 450V.
  • the withstand voltage of the switching power supply chip of the auxiliary power supply such as the flyback switching power supply is generally 700V or less, and the actual peak voltage of the switching power supply chip is the DC input voltage, the reflected voltage of the switching transformer (100 to 200V), the leakage inductance voltage drop ( 100V to 200V), then the DC input voltage of the auxiliary power supply is generally lower than 450V when it is working stably.
  • the auxiliary power supply cannot directly take power from the high-voltage DC bus, but requires another independent channel of phase voltage rectification to supply power.
  • the circuit topology diagrams of the current three-phase power supply air conditioning system mainly include but are not limited to the following three types, which are respectively the circuit topology diagrams shown in FIG. 1 to FIG. 3 .
  • the inverter compressor load is connected to the HVDC bus voltage, in addition, since the voltage on the HVDC bus exceeds The DC input voltage of the IPM module of the DC fan load or the auxiliary power supply is required, so the DC fan load or the auxiliary power supply does not take power from the high-voltage DC bus voltage, but supplies power through an independent channel of phase voltage rectification.
  • the inverter compressor load is connected to the HVDC bus voltage, in addition, since the voltage on the HVDC bus exceeds Therefore, the DC fan load or auxiliary power supply does not take power from the high-voltage DC bus voltage, but supplies power through an independent channel of phase voltage rectification.
  • the inverter compressor load is connected to the high-voltage DC bus voltage.
  • the voltage exceeds the DC input voltage requirement of the IPM module of the DC fan load or the auxiliary power supply, so the DC fan load or the auxiliary power supply does not take power from the high-voltage DC bus voltage, but supplies power through an independent channel of phase voltage rectification.
  • embodiments of the present disclosure provide an electronic circuit and an air conditioner, wherein the electronic circuit includes a rectifier module and an energy storage module, the rectifier module includes a three-phase rectifier bridge and a bidirectional switch assembly, and the three-phase rectifier bridge includes a mutual The first bridge arm, the second bridge arm and the third bridge arm are connected in parallel; the two-way switch assembly includes a first two-way switch, a second two-way switch and a third two-way switch, and one end of the first two-way switch is connected to the midpoint of the first bridge arm One end of the second two-way switch is connected to the midpoint of the second bridge arm, and one end of the third two-way switch is connected to the midpoint of the third bridge arm; the energy storage module is connected to the DC output end of the rectifier module, and the energy storage module includes two mutual For capacitors connected in series, the other end of the first bidirectional switch, the other end of the second bidirectional switch, and the other end of the third bidirectional switch are all connected between the
  • a DC load with a low withstand voltage such as a DC fan load or an auxiliary power supply
  • the capacitor in the energy storage module can supply power to the DC fan load or Auxiliary power supply and other DC loads with low withstand voltage performance, and can balance the three-phase current of the three-phase AC power supply, avoid the harmonic current of a certain phase being significantly larger, and can effectively reduce the harmonics.
  • FIGS. 4 , 10 and 16 are schematic diagrams of electronic circuits provided by some embodiments of the present disclosure.
  • the electronic circuit includes a rectifier module and an energy storage module 500 .
  • the rectifier module includes a three-phase rectifier bridge 300 and a two-way switch assembly 400.
  • the three-phase rectifier bridge 300 includes a first bridge arm, a second bridge arm and a third bridge arm connected in parallel with each other;
  • the two-way switch assembly 400 includes a first two-way switch, The second two-way switch and the third two-way switch, one end of the first two-way switch is connected to the midpoint of the first bridge arm, one end of the second two-way switch is connected to the midpoint of the second bridge arm, and one end of the third two-way switch is connected to the third bridge
  • the energy storage module 500 is connected to the DC output end of the rectifier module,
  • the energy storage module 500 includes two capacitors connected in series with each other, the other end of the first bidirectional switch, the other end of the second bidirectional switch, and the third bidirectional switch. The other ends of the capacitors are connected between two capacitors
  • the capacitor in the energy storage module 500 can supply power to the DC fan load or auxiliary power supply and other DC loads with low withstand voltage performance, and can balance the three-phase current of the three-phase AC power supply, avoid the significantly larger harmonics of a certain phase current, and effectively reduce the harmonics.
  • the first bridge arm includes FIG. 4 , FIG. 10 and FIG. 16
  • the second bridge arm includes the third diode D3 and the fourth diode D4 shown in Fig. 4, Fig. 10 and Fig. 16,
  • the third bridge arm includes a fifth diode D5 and a sixth diode D6 as shown in FIGS. 4 , 10 and 16 .
  • the first bidirectional switch includes the first IGBT module T1 and the second IGBT module T2 as shown in FIG. 4 , FIG. 10 and FIG. 16
  • the second bidirectional switch includes FIG. 4 , FIG. 10 and FIG. 16
  • the third bidirectional switch includes the fifth IGBT module T5 and the sixth IGBT module T6 as shown in FIG. 4 , FIG. 10 and FIG. 16 .
  • the second bidirectional switch and the third bidirectional switch in the above-mentioned bidirectional switch assembly 400 in addition to the two reverse series power switch tubes shown in FIG. 24, It can also include two anti-parallel power switch tubes as shown in FIG. 25; secondly, it can also include a fourth bridge arm, a power switch tube and a fifth bridge arm in parallel with each other as shown in FIG. 26, for example Ground, the fourth bridge arm may include a seventh diode D7 and an eighth diode D8 as shown in FIG. 26 , and the fifth bridge arm may include a ninth diode D9 and an eighth diode D8 as shown in FIG. 26 .
  • Ten diodes D10 in addition, it can be understood that at least one diode among the above-mentioned seventh diode D7, eighth diode D8, ninth diode D9 and tenth diode D10 can be replaced by MOS tube, IGBT tube with an anti-parallel diode, etc. have a reverse cut-off function; in addition, the above-mentioned power switch tube can be an IGBT, MOSFET and other devices that can be controlled to be turned on and off.
  • the two capacitors may be the first capacitor C1 shown in FIG. 4 , FIG. 10 and FIG. 16 respectively. and the second capacitor C2, the positive bus terminal is connected to the negative bus terminal through the first capacitor C1 and the second capacitor C2 in turn.
  • the half-bus bar in the embodiments of the present disclosure refers to the upper half-bus bar between the midpoint of the series-connected two-stage capacitor and the positive bus in the high-voltage DC bus filter circuit using two-stage capacitors in series, and the two-stage capacitor Between the midpoint of the series and the negative busbar is the lower half busbar, and the upper half busbar and the lower half busbar are both half busbars.
  • the upper half bus is between the midpoint of the series connection of the first capacitor C1 and the second capacitor C2 and the positive bus terminal, and the midpoint of the series connection of the first capacitor C1 and the second capacitor C2 is connected to the negative bus. Between the ends is the lower half bus.
  • the electronic circuit in the embodiment of the present disclosure further includes, but is not limited to, an AC input terminal 100 and an inductive device 200 , wherein the AC input terminal 100 is connected to the rectifier module through the inductive device 200 .
  • the AC input terminal 100 includes a first phase input terminal, a second phase input terminal and a third phase input terminal
  • the inductance device 200 includes a first inductance, a second inductance and a third inductance
  • the first phase input terminal passes through the first phase input terminal.
  • the inductor is connected to the midpoint of the first bridge arm
  • the second phase input terminal is connected to the midpoint of the second bridge arm through the second inductor
  • the third phase input terminal is connected to the midpoint of the third bridge arm through the third inductor.
  • the first inductance may refer to the first inductance L1 shown in FIG. 4 , FIG. 10 and FIG. 16
  • the second inductance may refer to the second inductance L2 shown in FIG. 4 , FIG. 10 and FIG. 16
  • the third inductance reference may be made to the third inductance L3 shown in FIG. 4 , FIG. 10 and FIG. 16 .
  • the first capacitor C1 is connected in parallel with the first DC load 600,
  • the load 600 includes, but is not limited to, a first auxiliary power module and/or a first fan module.
  • the first fan module includes, but is not limited to, a first DC fan and a first drive assembly for driving the first DC fan.
  • a driving component is connected in parallel with the first capacitor C1.
  • the topology diagram of the T-type three-level active PFC circuit shown in FIG. 4 may include, but is not limited to, connecting the DC load in parallel with the upper half bus as shown in FIG. 5 to FIG. 9 .
  • the case of the T-type three-level active PFC circuit topology may include, but is not limited to, connecting the DC load in parallel with the upper half bus as shown in FIG. 5 to FIG. 9 .
  • the first capacitor C1 is connected in parallel with a first DC load 600 , wherein the first DC load 600 is a first fan module, and the first fan module includes a first DC fan 612 and is used for driving the first DC fan 612 .
  • the first driving component 611 of the DC fan 612 is connected in parallel with the first capacitor C1.
  • the first capacitor C1 is connected in parallel with a first DC load 600 , wherein the first DC load 600 is a first auxiliary power module 620 .
  • the first capacitor C1 is connected in parallel with a first DC load 600, wherein the first DC load 600 includes two first fan modules, and each first fan module includes a first DC fan 612 and A first driving component 611 for driving the first DC fan 612, and the first driving component 611 is connected in parallel to the first capacitor C1.
  • the first capacitor C1 is connected in parallel with a first DC load 600, wherein the first DC load 600 includes a first auxiliary power module 620 and a first fan module, and the first fan module includes a first DC load
  • the flow fan 612 and the first driving assembly 611 for driving the first direct current fan 612, and the first driving assembly 611 is connected in parallel to the first capacitor C1.
  • the first capacitor C1 is connected in parallel with a first DC load 600, wherein the first DC load 600 includes a first auxiliary power module 620 and two first fan modules, each of which includes a The first DC fan 612 and the first driving assembly 611 for driving the first DC fan 612 are connected in parallel with the first capacitor C1.
  • the second DC load 700 is connected in parallel with the second capacitor C2 , and the second DC load 700 includes The second auxiliary power module and/or the second fan module, the second fan module includes a second DC fan and a second drive assembly for driving the second DC fan, the second drive assembly is connected in parallel to the second capacitor C2.
  • the topology of the T-type three-level active PFC circuit shown in FIG. 10 may include, but not limited to, as shown in FIGS. 11 to 15 , the DC load is connected in parallel with the lower half bus. Case T-type three-level active PFC circuit topology.
  • a second DC load 700 is connected in parallel with the second capacitor C2, wherein the second DC load 700 is a second fan module, and the second fan module includes a second DC fan 712 and is used for driving the second DC fan
  • the second driving component 711 of 712, and the second driving component 711 is connected in parallel to the second capacitor C2.
  • a second DC load 700 is connected in parallel with the second capacitor C2 , wherein the second DC load 700 is a second auxiliary power module 720 .
  • a second DC load 700 is connected in parallel with the second capacitor C2, wherein the second DC load 700 includes two second fan modules, and each second fan module includes a second DC fan 712 and is used for driving The second driving component 711 of the second DC fan 712 is connected in parallel with the second capacitor C2.
  • a second DC load 700 is connected in parallel with the second capacitor C2, wherein the second DC load 700 includes a second auxiliary power module 720 and a second fan module, and the second fan module includes a second DC fan 712 and a second driving component 711 for driving the second DC fan 712, and the second driving component 711 is connected in parallel to the second capacitor C2.
  • a second DC load 700 is connected in parallel with the second capacitor C2, wherein the second DC load 700 includes a second auxiliary power module 720 and two second fan modules, each of which includes a second fan module.
  • the DC fan 712 and the second driving assembly 711 for driving the second DC fan 712 are connected in parallel to the second capacitor C2.
  • the first capacitor C1 is connected in parallel with the first DC load 600
  • the second capacitor C2 is connected in parallel with a second DC load 700
  • the first DC load 600 includes a first auxiliary power module and/or a first fan module
  • the first fan module includes a first DC fan and is used to drive the first DC fan.
  • the first drive assembly of the flow fan is connected in parallel to the first capacitor C1;
  • the second DC load 700 includes a second auxiliary power module and/or a second fan module, and the second fan module includes a second DC fan and is used for A second driving component for driving the second DC fan, the second driving component is connected in parallel with the second capacitor C2.
  • the topology of the T-type three-level active PFC circuit shown in FIG. 16 may include, but is not limited to, connecting the DC loads in parallel with the upper half as shown in FIG. 17 to FIG. 23 respectively.
  • the first capacitor C1 is connected in parallel with a first DC load 600 and the second capacitor C2 is connected in parallel with a second DC load 700;
  • the first DC load 600 is a first fan module, and the first fan module includes There is a first DC fan 612 and a first drive assembly 611 for driving the first DC fan 612, and the first drive assembly 611 is connected in parallel to the first capacitor C1;
  • the second DC load 700 is the second fan module, the second The fan module includes a second DC fan 712 and a second driving component 711 for driving the second DC fan 712, and the second driving component 711 is connected in parallel with the second capacitor C2.
  • the first capacitor C1 is connected in parallel with a first DC load 600 and the second capacitor C2 is connected in parallel with a second DC load 700; wherein the first DC load 600 is a first fan module, and the first fan module includes There are a first DC fan 612 and a first drive assembly 611 for driving the first DC fan 612 , and the first drive assembly 611 is connected in parallel to the first capacitor C1 ; the second DC load 700 is a second auxiliary power module 720 .
  • the first capacitor C1 is connected in parallel with a first DC load 600 and the second capacitor C2 is connected in parallel with a second DC load 700; wherein the first DC load 600 is the first auxiliary power module 620; the second DC load
  • the load 700 is a second fan module, and the second fan module includes a second DC fan 712 and a second driving component 711 for driving the second DC fan 712 , and the second driving component 711 is connected in parallel to the second capacitor C2 .
  • a first DC load 600 is connected in parallel with the first capacitor C1 and a second DC load 700 is connected in parallel with the second capacitor C2; wherein, the first DC load 600 includes a first auxiliary power module 620 and a first DC load Fan module, the first fan module includes a first DC fan 612 and a first drive assembly 611 for driving the first DC fan 612, and the first drive assembly 611 is connected in parallel to the first capacitor C1; the second DC load 700
  • the second fan module includes a second DC fan 712 and a second driving component 711 for driving the second DC fan 712 , and the second driving component 711 is connected in parallel to the second capacitor C2 .
  • the first capacitor C1 is connected in parallel with a first DC load 600 and the second capacitor C2 is connected in parallel with a second DC load 700;
  • the first DC load 600 is a first fan module, and the first fan module includes There is a first DC fan 612 and a first drive assembly 611 for driving the first DC fan 612, and the first drive assembly 611 is connected in parallel to the first capacitor C1;
  • the second DC load 700 includes a second auxiliary power module 720 and A second fan module, the second fan module includes a second DC fan 712 and a second driving component 711 for driving the second DC fan 712, and the second driving component 711 is connected in parallel to the second capacitor C2.
  • the first capacitor C1 is connected in parallel with a first DC load 600 and the second capacitor C2 is connected in parallel with a second DC load 700; wherein, the first DC load 600 is the first auxiliary power module 620; the second DC load
  • the load 700 includes two second fan modules, each second fan module includes a second DC fan 712 and a second drive assembly 711 for driving the second DC fan 712, and the second drive assembly 711 is connected in parallel to the second capacitor C2.
  • the first capacitor C1 is connected in parallel with a first DC load 600 and the second capacitor C2 is connected in parallel with a second DC load 700; wherein the first DC load 600 includes two first fan modules, each of which is A fan module includes a first DC fan 612 and a first drive assembly 611 for driving the first DC fan 612, and the first drive assembly 611 is connected in parallel to the first capacitor C1; the second DC load 700 is the second auxiliary Power module 720 .
  • the number of the first fan module and the second fan module in the above embodiment may be one or multiple.
  • the electronic circuit of the embodiment of the present disclosure further includes, but is not limited to, a third DC load 800 , wherein the third DC load 800 is connected to the DC output terminal.
  • the third DC load 800 includes a compressor 812 and a third drive assembly 811 for driving the compressor 812, and the third drive assembly 811 is connected to the DC output terminal.
  • first drive assembly 611 , the second drive assembly 711 and the third drive assembly 811 in the above embodiments may be IPM modules for driving a DC fan.
  • an embodiment of the present disclosure further provides an air conditioner, the air conditioner includes the electronic circuit of any of the above embodiments.
  • the specific implementation and technical effects of the air conditioner of the embodiment of the present disclosure may refer to the specific implementation of the electronic circuit of any of the above-mentioned embodiments. and technical effects.

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Abstract

一种电子电路和空调器，其中电子电路包括整流模块和储能模块（500），整流模块包括三相整流桥（300）和双向开关组件（400），三相整流桥（300）包括相互并联的第一桥臂、第二桥臂和第三桥臂；双向开关组件（400）包括第一双向开关、第二双向开关和第三双向开关；储能模块（500）与整流模块的直流输出端连接，储能模块（500）包括两个相互串联的电容；其中，至少一个电容并联有直流负载。

Description

电子电路和空调器
相关申请的交叉引用
本申请要求于2020年09月30日提交的申请号为202011063267.7、名称为“电子电路和空调器”，以及于2020年09月30日提交的申请号为202022223541.4、名称为“电子电路和空调器”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本公开涉及电子电路技术领域，特别是涉及一种电子电路和空调器。
背景技术
在三相电源供电中，除了变频压缩机负载外，还会设置有直流风机负载或者辅助电源。而现有技术方案一般为：三相电源经过无源PFC(Power Factor Correction，功率因数校正)整流电路或者两电平有源PFC整流电路后输出高压直流母线电压，变频压缩机负载连接在高压直流母线电压上；而由于高压直流母线上的电压超过了直流风机负载的IPM(Intelligent Power Module,智能功率模块)或者辅助电源的直流输入电压要求，因此直流风机负载或者辅助电源不从高压直流母线电压上取电，而是通过独立的一路相电压整流后供电。对于该技术方案，会导致驱动直流风机或辅助电源这一相供电的负载高于另外两相，并且增加的这一部分负载没有经过两电平有源PFC电路，造成该相电流谐波更大，三相电流不平衡，且难以满足IEC(International Electro technical Commission，国际电工委员会)谐波要求。
发明内容
本公开旨在至少部分解决现有技术中存在的技术问题之一。为此，本公开提出一种电子电路和空调器，能够提供稳定的电压，平衡三相电流，有效降低谐波。
根据本公开的第一方面实施例的电子电路，包括：
整流模块，所述整流模块包括三相整流桥和双向开关组件，所述三相整流桥包括相互并联的第一桥臂、第二桥臂和第三桥臂；所述双向开关组件包括第一双向开关、第二双向开关和第三双向开关，所述第一双向开关的一端连接所述第一桥臂的中点，所述第二双向开关的一端连接所述第二桥臂的中点，所述第三双向开关的一端连接所述第三桥臂的中点；
储能模块，所述储能模块与所述整流模块的直流输出端连接，所述储能模块包括两个相互串联的电容，所述第一双向开关的另一端、所述第二双向开关的另一端、所述第三双向开关的另一端均连接于两个所述电容之间；
其中，至少一个所述电容并联有直流负载。
根据本公开实施例的电子电路，至少具有如下有益效果：本公开实施例的电子电路设置有整流模块和储能模块，其中储能模块包括有两个相互串联的电容，并且本公开实施例将直流风机负载或者辅助电源等耐压性能较低的直流负载并联至储能模块中的电容，进而可以通过储能模块中的电容供电给到直流风机负载或者辅助电源等耐压性能较低的直流负载，而且 能够平衡三相交流电源的三相电流，避免某相电流谐波明显较大，能够有效降低谐波。
根据本公开的一些实施例，所述直流输出端包括正母线端和负母线端，两个所述电容分别为第一电容和第二电容，所述正母线端依次通过所述第一电容和所述第二电容连接至所述负母线端。
根据本公开的一些实施例，所述第一电容并联有第一直流负载，所述第一直流负载包括第一辅助电源模块和/或第一风机模块，所述第一风机模块包括第一直流风机和用于驱动所述第一直流风机的第一驱动组件，所述第一驱动组件并联至所述第一电容。
根据本公开的一些实施例，所述第二电容并联有第二直流负载，所述第二直流负载包括第二辅助电源模块和/或第二风机模块，所述第二风机模块包括第二直流风机和用于驱动所述第二直流风机的第二驱动组件，所述第二驱动组件并联至所述第二电容。
根据本公开的一些实施例，所述第一电容并联有第一直流负载，所述第二电容并联有第二直流负载；所述第一直流负载包括第一辅助电源模块和/或第一风机模块，所述第一风机模块包括第一直流风机和用于驱动所述第一直流风机的第一驱动组件，所述第一驱动组件并联至所述第一电容；所述第二直流负载包括第二辅助电源模块和/或第二风机模块，所述第二风机模块包括第二直流风机和用于驱动所述第二直流风机的第二驱动组件，所述第二驱动组件并联至所述第二电容。
根据本公开的一些实施例，还包括第三直流负载，所述第三直流负载连接至所述直流输出端。
根据本公开的一些实施例，所述第三直流负载包括压缩机和用于驱动所述压缩机的第三驱动组件，所述第三驱动组件连接至所述直流输出端。
根据本公开的一些实施例，还包括交流输入端和电感器件，所述交流输入端通过所述电感器件连接至所述整流模块。
根据本公开的一些实施例，所述交流输入端包括第一相输入端、第二相输入端和第三相输入端，所述电感器件包括第一电感、第二电感和第三电感，所述第一相输入端通过所述第一电感连接至所述第一桥臂的中点，所述第二相输入端通过所述第二电感连接至所述第二桥臂的中点，所述第三相输入端通过所述第三电感连接至所述第三桥臂的中点。
根据本公开的一些实施例，所述第一双向开关、所述第二双向开关和所述第三双向开关均包括两个反向并联的功率开关管。
根据本公开的一些实施例，所述第一双向开关、所述第二双向开关和所述第三双向开关均包括两个反向串联的功率开关管，两个所述功率开关管均反向并联有二极管。
根据本公开的一些实施例，所述第一双向开关、所述第二双向开关和所述第三双向开关均包括相互并联的第四桥臂、功率开关管和第五桥臂。
根据本公开的第二方面实施例的空调器，包括如上述第一方面所述的电子电路。
根据本公开实施例的空调器，至少具有如下有益效果：本公开实施例的空调器包括有上述第一方面所述的电子电路，而电子电路设置有整流模块和储能模块，其中储能模块包括有两个相互串联的电容，并且本公开实施例将直流风机负载或者辅助电源等耐压性能较低的直流负载并联至储能模块中的电容，进而可以通过储能模块中的电容供电给到直流风机负载或者辅助电源等耐压性能较低的直流负载，而且能够平衡三相交流电源的三相电流，避免某相电流谐波明显较大，能够有效降低谐波。
附图说明
本公开的上述和/或附加的方面和优点结合下面附图对实施例的描述将变得明显和容易理解，其中：
图1是现有技术中一种带有辅助电源和两个直流风机负载的三相无源PFC电路拓扑图；
图2是现有技术中一种带有辅助电源和两个直流风机负载的两电平有源PFC电路拓扑图；
图3是现有技术中一种带有辅助电源和两个直流风机负载的T型三电平有源PFC电路拓扑图；
图4为本公开一个实施例提供的将直流负载并联在上半母线的情况下的T型三电平有源PFC电路拓扑图；
图5为本公开另一个实施例提供的将直流负载并联在上半母线的情况下的T型三电平有源PFC电路拓扑图；
图6为本公开另一个实施例提供的将直流负载并联在上半母线的情况下的T型三电平有源PFC电路拓扑图；
图7为本公开另一个实施例提供的将直流负载并联在上半母线的情况下的T型三电平有源PFC电路拓扑图；
图8为本公开另一个实施例提供的将直流负载并联在上半母线的情况下的T型三电平有源PFC电路拓扑图；
图9为本公开另一个实施例提供的将直流负载并联在上半母线的情况下的T型三电平有源PFC电路拓扑图；
图10为本公开一个实施例提供的将直流负载并联在下半母线的情况下的T型三电平有源PFC电路拓扑图；
图11为本公开另一个实施例提供的将直流负载并联在下半母线的情况下的T型三电平有源PFC电路拓扑图；
图12为本公开另一个实施例提供的将直流负载并联在下半母线的情况下的T型三电平有源PFC电路拓扑图；
图13为本公开另一个实施例提供的将直流负载并联在下半母线的情况下的T型三电平有源PFC电路拓扑图；
图14为本公开另一个实施例提供的将直流负载并联在下半母线的情况下的T型三电平有源PFC电路拓扑图；
图15为本公开另一个实施例提供的将直流负载并联在下半母线的情况下的T型三电平有源PFC电路拓扑图；
图16为本公开一个实施例提供的将直流负载分别并联在上半母线和下半母线的情况下的T型三电平有源PFC电路拓扑图；
图17为本公开另一个实施例提供的将直流负载分别并联在上半母线和下半母线的情况下的T型三电平有源PFC电路拓扑图；
图18为本公开另一个实施例提供的将直流负载分别并联在上半母线和下半母线的情况下的T型三电平有源PFC电路拓扑图；
图19为本公开另一个实施例提供的将直流负载分别并联在上半母线和下半母线的情况 下的T型三电平有源PFC电路拓扑图；
图20为本公开另一个实施例提供的将直流负载分别并联在上半母线和下半母线的情况下的T型三电平有源PFC电路拓扑图；
图21为本公开另一个实施例提供的将直流负载分别并联在上半母线和下半母线的情况下的T型三电平有源PFC电路拓扑图；
图22为本公开另一个实施例提供的将直流负载分别并联在上半母线和下半母线的情况下的T型三电平有源PFC电路拓扑图；
图23为本公开另一个实施例提供的将直流负载分别并联在上半母线和下半母线的情况下的T型三电平有源PFC电路拓扑图；
图24为本公开一个实施例提供的关于第一双向开关、第二双向开关和第三双向开关的结构示意图；
图25为本公开另一个实施例提供的关于第一双向开关、第二双向开关和第三双向开关的结构示意图；以及
图26为本公开另一个实施例提供的关于第一双向开关、第二双向开关和第三双向开关的结构示意图。
具体实施方式
下面详细描述本公开的实施例，实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，仅用于解释本公开，而不能理解为对本公开的限制。
在本公开的描述中，需要理解的是，涉及到方位描述，例如上、下、前、后、左、右等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本公开和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本公开的限制。
在本公开的描述中，若干的含义是一个或者多个，多个的含义是两个以上，大于、小于、超过等理解为不包括本数，以上、以下、以内等理解为包括本数。如果有描述到第一、第二只是用于区分技术特征为目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量或者隐含指明所指示的技术特征的先后关系。
本公开的描述中，除非另有明确的限定，设置、安装、连接等词语应做广义理解，所属技术领域技术人员可以结合技术方案的具体内容合理确定上述词语在本公开中的具体含义。
在相关技术中，对于三相电源供电的高能效变频空调系统，除了变频压缩机负载外，还会设置有直流风机负载或者辅助电源，其中，有的空调系统设置有一个直流风机，有的空调系统设置有两个直流风机甚至更多。现有技术方案一般为：三相电源经过无源PFC整流电路或者两电平有源PFC整流电路后输出高压直流母线电压，变频压缩机负载接在高压直流母线电压上；而直流风机负载和辅助电源不是从高压直流母线电压上取电，而是通过另外独立的一路相电压整流后供电。这样设计的原因在于：辅助电源和用于驱动直流风机的IPM模块的耐压不够，不能直接从高压直流母线取电。
示例性地，三相线电压有效值标称380V，则整流后的高压直流母线电压为537V；若加上10％的电源电压波动允许误差，则高压直流母线电压将可能达到590V；如果采用有源PFC控 制，则直流母线电压能够进一步提升。高压电解电容的耐压一般在450V以下，在此应用场景下，直流母线的高压电解电容必须采用两级串联方式提高耐压，两级串联耐压理论上可达900V。而用于驱动直流风机的IPM模块的耐压一般为500V或者600V，加上IPM模块的耐压设计要求，实际上用于驱动直流风机的IPM模块的输入电压一般也要在450V以下。由于高压直流母线的电压高于用于驱动直流风机的IPM模块的输入电压要求，从而导致IPM模块无法直接从高压直流母线取电。
另外，类似地，空调系统中的辅助电源的直流输入电压也要求在450V以下。原因是反激式开关电源等类型的辅助电源的开关电源芯片耐压一般700V或以下，而开关电源芯片实际峰值电压是直流输入电压、开关变压器反射电压(100至200V)、漏感压降(100V至200V)之和，那么辅助电源稳定工作时的直流输入电压一般要低于450V。换句话说，辅助电源也不能直接从高压直流母线取电，而需要另外独立的一路相电压整流后供电。
基于上述设计原因，目前的三相电源供电的空调系统的电路拓扑图主要包括但不限于如下三种，分别为图1至图3中所示的电路拓扑图。
对于图1中所示的带有辅助电源和两个直流风机负载的三相无源PFC电路拓扑图，变频压缩机负载连接在高压直流母线电压上，另外，由于高压直流母线上的电压超过了直流风机负载的IPM模块或者辅助电源的直流输入电压要求，因此直流风机负载或者辅助电源不从高压直流母线电压上取电，而是通过独立的一路相电压整流后供电。
对于图2中所示的带有辅助电源和两个直流风机负载的两电平有源PFC电路拓扑图，变频压缩机负载连接在高压直流母线电压上，另外，由于高压直流母线上的电压超过了直流风机负载的IPM模块或者辅助电源的直流输入电压要求，因此直流风机负载或者辅助电源不从高压直流母线电压上取电，而是通过独立的一路相电压整流后供电。
对于图3中所示的带有辅助电源和两个直流风机负载的T型三电平有源PFC电路拓扑图，变频压缩机负载连接在高压直流母线电压上，另外，由于高压直流母线上的电压超过了直流风机负载的IPM模块或者辅助电源的直流输入电压要求，因此直流风机负载或者辅助电源不从高压直流母线电压上取电，而是通过独立的一路相电压整流后供电。
对于上述现有的供电方案，需要采用独立的一路相电压整流后给直流风机负载和辅助电源供电，从而可以使得整流后的直流电压满足IPM模块和辅助电源的耐压要求。但是该供电方案会导致驱动直流风机负载或辅助电源这一相供电的负载高于另外两相，并且增加的这一部分负载没有经过两电平有源PFC电路，造成该相电流谐波明显更大，三相电流不平衡，且难以满足IEC谐波要求。
因此，基于上述情况，本公开实施例提供了一种电子电路和空调器，其中，电子电路包括整流模块和储能模块，整流模块包括三相整流桥和双向开关组件，三相整流桥包括相互并联的第一桥臂、第二桥臂和第三桥臂；双向开关组件包括第一双向开关、第二双向开关和第三双向开关，第一双向开关的一端连接第一桥臂的中点，第二双向开关的一端连接第二桥臂的中点，第三双向开关的一端连接第三桥臂的中点；储能模块与整流模块的直流输出端连接，储能模块包括两个相互串联的电容，第一双向开关的另一端、第二双向开关的另一端、第三双向开关的另一端均连接于两个电容之间；其中，至少一个电容并联有直流负载。根据本公开实施例的技术方案，将直流风机负载或者辅助电源等耐压性能较低的直流负载并联至储能模块中的电容，进而可以通过储能模块中的电容供电给到直流风机负载或者辅助电源等耐压 性能较低的直流负载，而且能够平衡三相交流电源的三相电流，避免某相电流谐波明显较大，能够有效降低谐波。
下面结合附图，对本公开实施例作进一步阐述。
如图4、图10和图16所示，图4、图10和图16是本公开一些实施例提供的电子电路的示意图。
具体地，电子电路包括有整流模块和储能模块500。其中，整流模块包括三相整流桥300和双向开关组件400，三相整流桥300包括相互并联的第一桥臂、第二桥臂和第三桥臂；双向开关组件400包括第一双向开关、第二双向开关和第三双向开关，第一双向开关的一端连接第一桥臂的中点，第二双向开关的一端连接第二桥臂的中点，第三双向开关的一端连接第三桥臂的中点；储能模块500与整流模块的直流输出端连接，储能模块500包括两个相互串联的电容，第一双向开关的另一端、第二双向开关的另一端、第三双向开关的另一端均连接于两个电容之间；其中，至少一个电容并联有直流负载。
在一实施例中，由于本公开实施例将直流风机负载或者辅助电源等耐压性能较低的直流负载并联至储能模块500中的电容，进而可以通过储能模块500中的电容供电给到直流风机负载或者辅助电源等耐压性能较低的直流负载，而且能够平衡三相交流电源的三相电流，避免某相电流谐波明显较大，能够有效降低谐波。
需要说明的是，关于上述的三相整流桥300中的第一桥臂、第二桥臂和第三桥臂，其中，示例性地，第一桥臂包括如图4、图10和图16中所示的第一二极管D1和第二二极管D2，第二桥臂包括如图4、图10和图16中所示的第三二极管D3和第四二极管D4，第三桥臂包括如图4、图10和图16中所示的第五二极管D5和第六二极管D6。
另外，关于上述的双向开关组件400中的第一双向开关、第二双向开关和第三双向开关，均可以包括两个反向串联的功率开关管，并且两个功率开关管均反向并联有二极管，如图24所示。其中，示例性地，第一双向开关包括如图4、图10和图16中所示的第一IGBT模块T1和第二IGBT模块T2，第二双向开关包括如图4、图10和图16中所示的第三IGBT模块T3和第四IGBT模块T4，第三双向开关包括如图4、图10和图16中所示的第五IGBT模块T5和第六IGBT模块T6。
可以理解的是，关于上述的双向开关组件400中的第一双向开关、第二双向开关和第三双向开关，除了可以包括如图24所示的两个反向串联的功率开关管之外，还可以包括如图25所示的两个反向并联的功率开关管；其次，还可以包括如图26中所示的相互并联的第四桥臂、功率开关管和第五桥臂，示例性地，第四桥臂可以包括如图26中所示的第七二极管D7和第八二极管D8，第五桥臂可以包括如图26中所示的第九二极管D9和第十二极管D10，另外，可以理解的是，上述的第七二极管D7、第八二极管D8、第九二极管D9和第十二极管D10中的至少一个二极管可以替换为MOS管、带反向并联二极管的IGBT管等等具有反向截止功能的器件；另外，上述的功率开关管可以为IGBT、MOSFET等可控制通断的器件。
另外，关于上述的直流输出端和两个电容，其中，直流输出端包括正母线端和负母线端，两个电容可以分别为如图4、图10和图16中所示的第一电容C1和第二电容C2，正母线端依次通过第一电容C1和第二电容C2连接至负母线端。
值得注意的是，本公开实施例中的半母线，是指在采用两级电容串联的高压直流母线滤波电路中，两级电容串联的中点与正母线之间为上半母线，两级电容串联的中点到负母线之 间为下半母线，上半母线和下半母线均为半母线。示例性地，本公开实施例中，第一电容C1和第二电容C2串联的中点与正母线端之间为上半母线，第一电容C1和第二电容C2串联的中点与负母线端之间为下半母线。
需要说明的是，本公开实施例中的电子电路，还包括但不限于有交流输入端100和电感器件200，其中，交流输入端100通过电感器件200连接至整流模块。
具体地，交流输入端100包括第一相输入端、第二相输入端和第三相输入端，电感器件200包括第一电感、第二电感和第三电感，第一相输入端通过第一电感连接至第一桥臂的中点，第二相输入端通过第二电感连接至第二桥臂的中点，第三相输入端通过第三电感连接至第三桥臂的中点。示例性地，第一电感可以参照如图4、图10和图16中所示的第一电感L1，第二电感可以参照如图4、图10和图16中所示的第二电感L2，第三电感可以参照如图4、图10和图16中所示的第三电感L3。
基于如图4所示的将直流负载并联在上半母线的情况下的T型三电平有源PFC电路拓扑图，其中，第一电容C1并联有第一直流负载600，第一直流负载600包括但不限于有第一辅助电源模块和/或第一风机模块，第一风机模块包括但不限于有第一直流风机和用于驱动第一直流风机的第一驱动组件，第一驱动组件并联至第一电容C1。
具体地，在实际应用过程中，对于图4所示的T型三电平有源PFC电路拓扑图，可以包括但不限于有如图5至图9中所示的将直流负载并联在上半母线的情况下的T型三电平有源PFC电路拓扑图。
如图5所示，第一电容C1并联有第一直流负载600，其中，第一直流负载600为第一风机模块，第一风机模块包括有第一直流风机612和用于驱动第一直流风机612的第一驱动组件611，并且第一驱动组件611并联至第一电容C1。
如图6所示，第一电容C1并联有第一直流负载600，其中，第一直流负载600为第一辅助电源模块620。
如图7所示，第一电容C1并联有第一直流负载600，其中，第一直流负载600包括两个第一风机模块，每一个第一风机模块包括有第一直流风机612和用于驱动第一直流风机612的第一驱动组件611，并且第一驱动组件611并联至第一电容C1。
如图8所示，第一电容C1并联有第一直流负载600，其中，第一直流负载600包括第一辅助电源模块620和一个第一风机模块，第一风机模块包括有第一直流风机612和用于驱动第一直流风机612的第一驱动组件611，并且第一驱动组件611并联至第一电容C1。
如图9所示，第一电容C1并联有第一直流负载600，其中，第一直流负载600包括第一辅助电源模块620和两个第一风机模块，每一个第一风机模块包括有第一直流风机612和用于驱动第一直流风机612的第一驱动组件611，并且第一驱动组件611并联至第一电容C1。
基于如图10所示的将直流负载并联在下半母线的情况下的T型三电平有源PFC电路拓扑图，其中，第二电容C2并联有第二直流负载700，第二直流负载700包括第二辅助电源模块和/或第二风机模块，第二风机模块包括第二直流风机和用于驱动第二直流风机的第二驱动组件，第二驱动组件并联至第二电容C2。
具体地，在实际应用过程中，对于图10所示的T型三电平有源PFC电路拓扑图，可以包括但不限于有如图11至图15中所示的将直流负载并联在下半母线的情况下的T型三电平有源PFC电路拓扑图。
如图11所示，第二电容C2并联有第二直流负载700，其中，第二直流负载700为第二风机模块，第二风机模块包括有第二直流风机712和用于驱动第二直流风机712的第二驱动组件711，并且第二驱动组件711并联至第二电容C2。
如图12所示，第二电容C2并联有第二直流负载700，其中，第二直流负载700为第二辅助电源模块720。
如图13所示，第二电容C2并联有第二直流负载700，其中，第二直流负载700包括两个第二风机模块，每一个第二风机模块包括有第二直流风机712和用于驱动第二直流风机712的第二驱动组件711，并且第二驱动组件711并联至第二电容C2。
如图14所示，第二电容C2并联有第二直流负载700，其中，第二直流负载700包括第二辅助电源模块720和一个第二风机模块，第二风机模块包括有第二直流风机712和用于驱动第二直流风机712的第二驱动组件711，并且第二驱动组件711并联至第二电容C2。
如图15所示，第二电容C2并联有第二直流负载700，其中，第二直流负载700包括第二辅助电源模块720和两个第二风机模块，每一个第二风机模块包括有第二直流风机712和用于驱动第二直流风机712的第二驱动组件711，并且第二驱动组件711并联至第二电容C2。
基于如图16所示的将直流负载分别并联在上半母线和下半母线的情况下的T型三电平有源PFC电路拓扑图，其中，第一电容C1并联有第一直流负载600，第二电容C2并联有第二直流负载700；第一直流负载600包括第一辅助电源模块和/或第一风机模块，第一风机模块包括第一直流风机和用于驱动第一直流风机的第一驱动组件，第一驱动组件并联至第一电容C1；第二直流负载700包括第二辅助电源模块和/或第二风机模块，第二风机模块包括第二直流风机和用于驱动第二直流风机的第二驱动组件，第二驱动组件并联至第二电容C2。
具体地，在实际应用过程中，对于图16所示的T型三电平有源PFC电路拓扑图，可以包括但不限于有如图17至图23中所示的将直流负载分别并联在上半母线和下半母线的情况下的T型三电平有源PFC电路拓扑图。
如图17所示，第一电容C1并联有第一直流负载600并且第二电容C2并联有第二直流负载700；其中，第一直流负载600为第一风机模块，第一风机模块包括有第一直流风机612和用于驱动第一直流风机612的第一驱动组件611，并且第一驱动组件611并联至第一电容C1；第二直流负载700为第二风机模块，第二风机模块包括有第二直流风机712和用于驱动第二直流风机712的第二驱动组件711，并且第二驱动组件711并联至第二电容C2。
如图18所示，第一电容C1并联有第一直流负载600并且第二电容C2并联有第二直流负载700；其中，第一直流负载600为第一风机模块，第一风机模块包括有第一直流风机612和用于驱动第一直流风机612的第一驱动组件611，并且第一驱动组件611并联至第一电容C1；第二直流负载700为第二辅助电源模块720。
如图19所示，第一电容C1并联有第一直流负载600并且第二电容C2并联有第二直流负载700；其中，第一直流负载600为第一辅助电源模块620；第二直流负载700为第二风机模块，第二风机模块包括有第二直流风机712和用于驱动第二直流风机712的第二驱动组件711，并且第二驱动组件711并联至第二电容C2。
如图20所示，第一电容C1并联有第一直流负载600并且第二电容C2并联有第二直流负载700；其中，第一直流负载600包括第一辅助电源模块620和一个第一风机模块，第一风机模块包括有第一直流风机612和用于驱动第一直流风机612的第一驱动组件611，并且第 一驱动组件611并联至第一电容C1；第二直流负载700为第二风机模块，第二风机模块包括有第二直流风机712和用于驱动第二直流风机712的第二驱动组件711，并且第二驱动组件711并联至第二电容C2。
如图21所示，第一电容C1并联有第一直流负载600并且第二电容C2并联有第二直流负载700；其中，第一直流负载600为第一风机模块，第一风机模块包括有第一直流风机612和用于驱动第一直流风机612的第一驱动组件611，并且第一驱动组件611并联至第一电容C1；第二直流负载700包括第二辅助电源模块720和一个第二风机模块，第二风机模块包括有第二直流风机712和用于驱动第二直流风机712的第二驱动组件711，并且第二驱动组件711并联至第二电容C2。
如图22所示，第一电容C1并联有第一直流负载600并且第二电容C2并联有第二直流负载700；其中，第一直流负载600为第一辅助电源模块620；第二直流负载700包括两个第二风机模块，每一个第二风机模块包括有第二直流风机712和用于驱动第二直流风机712的第二驱动组件711，并且第二驱动组件711并联至第二电容C2。
如图23所示，第一电容C1并联有第一直流负载600并且第二电容C2并联有第二直流负载700；其中，第一直流负载600包括两个第一风机模块，每一个第一风机模块包括有第一直流风机612和用于驱动第一直流风机612的第一驱动组件611，并且第一驱动组件611并联至第一电容C1；第二直流负载700为第二辅助电源模块720。
值得注意的是，关于上述实施例中的第一风机模块和第二风机模块的数量，可以为一个，也可以为多个。
另外，参照图4至图23所示，本公开实施例的电子电路，还包括但不限于有第三直流负载800，其中，第三直流负载800连接至直流输出端。
具体地，第三直流负载800包括压缩机812和用于驱动压缩机812的第三驱动组件811，第三驱动组件811连接至直流输出端。
值得注意的是，关于上述实施例中的第一驱动组件611、第二驱动组件711和第三驱动组件811，可以为用于驱动直流风机的IPM模块。
基于上述的电子电路，下面提出本公开的空调器的各个实施例。
另外，本公开的一个实施例还提供了一种空调器，该空调器包括有上述任一实施例的电子电路。
由于本公开实施例的空调器包括有上述任一实施例的电子电路，因此，本公开实施例的空调器的具体实施方式和技术效果，可以参照上述任一实施例的电子电路的具体实施方式和技术效果。
以上是对本公开的较佳实施进行了具体说明，但本公开并不局限于上述实施方式，熟悉本领域的技术人员在不违背本公开精神的共享条件下还可作出种种等同的变形或替换，这些等同的变形或替换均包括在本公开权利要求所限定的范围内。

Claims (13)

  1. 一种电子电路，包括：
    整流模块，所述整流模块包括三相整流桥和双向开关组件，所述三相整流桥包括相互并联的第一桥臂、第二桥臂和第三桥臂；所述双向开关组件包括第一双向开关、第二双向开关和第三双向开关，所述第一双向开关的一端连接所述第一桥臂的中点，所述第二双向开关的一端连接所述第二桥臂的中点，所述第三双向开关的一端连接所述第三桥臂的中点；以及
    储能模块，所述储能模块与所述整流模块的直流输出端连接，所述储能模块包括两个相互串联的电容，所述第一双向开关的另一端、所述第二双向开关的另一端、所述第三双向开关的另一端均连接于两个所述电容之间；
    其中，至少一个所述电容并联有直流负载。
  2. 根据权利要求1所述的电子电路，其中，所述直流输出端包括正母线端和负母线端，两个所述电容分别为第一电容和第二电容，所述正母线端依次通过所述第一电容和所述第二电容连接至所述负母线端。
  3. 根据权利要求2所述的电子电路，其中，所述第一电容并联有第一直流负载，所述第一直流负载包括第一辅助电源模块和/或第一风机模块，所述第一风机模块包括第一直流风机和用于驱动所述第一直流风机的第一驱动组件，所述第一驱动组件并联至所述第一电容。
  4. 根据权利要求2所述的电子电路，其中，所述第二电容并联有第二直流负载，所述第二直流负载包括第二辅助电源模块和/或第二风机模块，所述第二风机模块包括第二直流风机和用于驱动所述第二直流风机的第二驱动组件，所述第二驱动组件并联至所述第二电容。
  5. 根据权利要求2所述的电子电路，其中，所述第一电容并联有第一直流负载，所述第二电容并联有第二直流负载；所述第一直流负载包括第一辅助电源模块和/或第一风机模块，所述第一风机模块包括第一直流风机和用于驱动所述第一直流风机的第一驱动组件，所述第一驱动组件并联至所述第一电容；所述第二直流负载包括第二辅助电源模块和/或第二风机模块，所述第二风机模块包括第二直流风机和用于驱动所述第二直流风机的第二驱动组件，所述第二驱动组件并联至所述第二电容。
  6. 根据权利要求1所述的电子电路，还包括第三直流负载，所述第三直流负载连接至所述直流输出端。
  7. 根据权利要求6所述的电子电路，其中，所述第三直流负载包括压缩机和用于驱动所述压缩机的第三驱动组件，所述第三驱动组件连接至所述直流输出端。
  8. 根据权利要求1所述的电子电路，还包括交流输入端和电感器件，所述交流输入端通过所述电感器件连接至所述整流模块。
  9. 根据权利要求8所述的电子电路，其中，所述交流输入端包括第一相输入端、第二相输入端和第三相输入端，所述电感器件包括第一电感、第二电感和第三电感，所述第一相输入端通过所述第一电感连接至所述第一桥臂的中点，所述第二相输入端通过所述第二电感连接至所述第二桥臂的中点，所述第三相输入端通过所述第三电感连接至所述第三桥臂的中点。
  10. 根据权利要求1至9任一所述的电子电路，其中，所述第一双向开关、所述第二双向开关和所述第三双向开关均包括两个反向并联的功率开关管。
  11. 根据权利要求1至9任一所述的电子电路，其中，所述第一双向开关、所述第二双 向开关和所述第三双向开关均包括两个反向串联的功率开关管，两个所述功率开关管均反向并联有二极管。
  12. 根据权利要求1至9任一所述的电子电路，其中，所述第一双向开关、所述第二双向开关和所述第三双向开关均包括相互并联的第四桥臂、功率开关管和第五桥臂。
  13. 一种空调器，包括权利要求1至12任意一项所述的电子电路。
PCT/CN2021/118018 2020-09-30 2021-09-13 电子电路和空调器 WO2022068566A1 (zh)

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