CN110268620A - Continuous-current plant and air conditioner - Google Patents
Continuous-current plant and air conditioner Download PDFInfo
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- CN110268620A CN110268620A CN201780085899.3A CN201780085899A CN110268620A CN 110268620 A CN110268620 A CN 110268620A CN 201780085899 A CN201780085899 A CN 201780085899A CN 110268620 A CN110268620 A CN 110268620A
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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
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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
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- Dc-Dc Converters (AREA)
Abstract
The present invention provides the continuous-current plant and air conditioner for also capableing of protection element when there is the disorder of the supply voltages such as lightning surge.Continuous-current plant (1) has: bridged rectifier circuit (10), and the inverting element (Q3, Q4) of rectification side and switch element (Q1, Q2) are carried out bridging and connect；Reactor (L1) is arranged between AC power source (Vs) and bridged rectifier circuit (10)；Smoothing capacity device (C1), is connected to the outlet side of bridged rectifier circuit (10), smooths to the voltage applied from bridged rectifier circuit (10)；Zero crossing determination unit (14) determines the zero crossing of the positive and negative switching of AC power source (Vs)；Convertor controls portion (18); it is after the judgement of zero crossing determination unit (14); in the case where the voltage that the voltage for detecting with being determined is opposite, the inverting element protection act for turning off the inverting element (Q3, Q4) of rectification side is executed.
Description
Technical field
It is filled the present invention relates to the continuous-current plant that alternating voltage is transformed to DC voltage and using the DC power supply
The air conditioner set.
Background technique
In electric car, automobile, air conditioner etc., the continuous-current plant that alternating voltage is transformed to DC voltage is installed.
In addition, by inverter being the alternating voltage of preset frequency by the DC voltage conversion exported from continuous-current plant, to electronic
The loads such as machine apply the alternating voltage.It is required that such continuous-current plant improves power converter efficiency and seeks energy conservation.
In the presence of to the continuous-current plant for being rectified or being boosted from the alternating voltage of power supply.In continuous-current plant
In have converter, be provided with switch element.Switch element determines voltage tolerance, if it exceeds tolerance then generates resistance to crush
It is bad.If in addition, switch element is continuously or discontinuously applied high voltage, high current heat can be generated, if thermal change obtains mistake
Height then causes to destroy.It is therefore desirable to which continuous-current plant avoid the control of high voltage, high fever.
Describe a kind of continuous-current plant in patent document 1, have: rectification circuit, by first diode and
Second diode and first switching element and second switch element carry out bridging and connect；Reactor, setting AC power source with
Between above-mentioned rectification circuit；Smoothing capacity device is connected to the outlet side of above-mentioned rectification circuit, applies to from above-mentioned rectification circuit
Voltage smoothed；Control unit executes the polarity with the voltage of above-mentioned AC power source synchronously to above-mentioned first switch
Element and above-mentioned second switch element are bidirectionally switched and are made current flow through the synchronous rectification control of load, and are repeated more
It executes and above-mentioned AC power source is controlled the short circuit of above-mentioned reactor short circuit secondaryly within the half period of above-mentioned AC power source.
Technology described in Patent Document 1 describes efficient power rectifier and boost in voltage method.
Existing technical literature
Patent document
Patent document 1: Japanese Unexamined Patent Publication 2016-214015 bulletin
Summary of the invention
Problems to be solved by the invention
In technology described in Patent Document 1, the protection etc. for the supply voltages disorder such as lightning surge is not recorded.?
In the case where disorder with supply voltages such as lightning surges, switch element i.e. inverting element of rectification side etc. is set and is possible to
Damage.
The present invention is given this situation to propose, project is, provides a kind of continuous-current plant and air-conditioning
Machine, also being capable of protection element when there is the disorder of the supply voltages such as lightning surge.
The means solved the problems, such as
To solve the above-mentioned problems, in first invention, it is a kind of continuous-current plant, has: rectification circuit, it will
In switch element i.e. the first inverting element of rectification side setting and the second inverting element and first switching element and second switch
Element carries out bridging and connects；Reactor is arranged between AC power source and above-mentioned rectification circuit；Smoothing capacity device is connected to
The outlet side of above-mentioned rectification circuit smooths the voltage applied from above-mentioned rectification circuit；Zero crossing determination unit determines
The zero crossing of the positive and negative switching of AC power source；Control unit is detecting and is determining after the judgement of above-mentioned zero crossing determination unit
Voltage opposite voltage when, execute the transformation for turning off above-mentioned first inverting element of rectification side and above-mentioned second inverting element
Element protection movement.
It is a kind of air conditioner, which is characterized in that have continuous-current plant described in claim 1 in the second invention.
Illustrate other means in the embodiment for carrying out an invention.
Invention effect
In accordance with the invention it is possible to provide a kind of continuous-current plant and air conditioner, there are the supply voltages such as lightning surge
Disorder when also being capable of protection element.
Detailed description of the invention
Fig. 1 is the structure chart of the continuous-current plant of embodiments of the present invention.
Fig. 2 indicate embodiments of the present invention continuous-current plant the case where AC supply voltage is positive polarity
Under, the current path that is flowed through in circuit when carrying out full-wave rectification.
Fig. 3 indicate embodiments of the present invention continuous-current plant the case where AC supply voltage is negative polarity
Under, the current path that is flowed through in circuit when carrying out full-wave rectification.
Fig. 4 indicates that the period of the continuous-current plant of embodiments of the present invention being positive in AC supply voltage will
The path for the short circuit current that MOSFET (Q2) flows through when connecting.
Fig. 5 indicates that the period of the continuous-current plant of embodiments of the present invention being negative in AC supply voltage will
Path when MOSFET (Q1) connects to short circuit current flow.
Fig. 6 indicate embodiments of the present invention continuous-current plant in the case where AC supply voltage disorder to whole
The signal that the inverting element of side is sent is flowed, respectively indicates the power supply voltage signal to get muddled, zero crossing in order since upper
Signal, MOSFET (Q3) signal, MOSFET (Q4) signal, MOSFET (Q1) signal, MOSFET (Q2) signal.
Inverting element is being determined as that power supply is negative by the continuous-current plant of Fig. 7 expression embodiments of the present invention, is sent out
It is flowed through in circuit in AC supply voltage since lightning surge etc. forms the polarity chron being positive in the case where having gone out rectified signal
Current path.
Inverting element is being determined as that power supply is negative Fig. 8 shows the continuous-current plant of embodiments of the present invention, is being sent out
It is flowed through in circuit in AC supply voltage since lightning surge etc. forms the polarity chron being positive in the case where having gone out short-circuit signal
Current path.
Fig. 9 indicates the mains voltage waveform of the continuous-current plant of embodiments of the present invention, divides in order since upper
Not detection interval, the waveform amplification near zero crossing, the waveform amplification for being superimposed noise are not indicated.
Figure 10 is the front elevation of the indoor unit of the air conditioner of present embodiment, outdoor unit and remote controler.
Specific embodiment
Hereinafter, the embodiment that present invention will be described in detail with reference to the accompanying.In addition, in the various figures, it is additional to common part
Identical appended drawing reference, and the repetitive description thereof will be omitted.
Fig. 1 is the structure chart of the continuous-current plant 1 of embodiments of the present invention.
As shown in Figure 1, continuous-current plant 1 is converter, the AC supply voltage Vs that will be supplied from AC power source VS
It is transformed to DC voltage Vd, and DC voltage Vd is output to load H (inverter, motor etc.).Continuous-current plant 1
Input side is connect with AC power source VS, and outlet side is connect with load H.
Continuous-current plant 1 has reactor L1, smoothing capacity device C1, comprising MOSFET (Q1, Q2, Q3, Q4) and shunting
The bridged rectifier circuit 10 of resistance R1.Continuous-current plant 1 is also equipped with control portion of gain 12, alternating voltage test section 13, zero is handed over
Pitch determination unit 14, load detecting portion 15, step-up ratio control unit 16, DC voltage the test section 17, (control of convertor controls portion 18
Portion).
Be arranged in rectification side switch element i.e. MOSFET (Q3, Q4) (the first inverting element and the second inverting element), with
And MOSFET (Q1, Q2) (first switching element and second switch element) constitutes bridged rectifier circuit 10.
MOSFET (Q1, Q2, Q3, Q4) bridging is connect.The source electrode of MOSFET (Q1) is connect with the drain electrode of MOSFET (Q2),
Tie point P1 is connect via wiring ha with one end of AC power source VS.
The source electrode of MOSFET (Q3) is connect with the drain electrode of MOSFET (Q4).The source electrode of MOSFET (Q3) and MOSFET (Q4)
The tie point P2 of drain electrode is connect via wiring hb with one end of AC power source VS.
In addition, MOSFET (Q3, Q4) is the inverting element of rectification side, in order to improve efficiency, instead of existing diode
It is used.
MOSFET (Q3, Q4) is, for example, SJ-MOSFET (Super-Junction MOS-FET: superjunction MOS-FET).Separately
Outside, MOSFET (Q1, Q2) is, for example, SJ-MOSFET or SiC (silicon carbide) MOSFET.
The grid resistance constant of the MOSFET (Q3, Q4) of inverting element as rectification side is set to than rectification side
The grid resistance constant of MOSFET (Q1, Q2) is big.
The source electrode of MOSFET (Q2) is connect with the source electrode of MOSFET (Q4).The drain electrode of MOSFET (Q1) and MOSFET (Q3)
Drain electrode connection.In addition, the drain electrode of the drain electrode of MOSFET (Q1) and MOSFET (Q3) via wiring hc and smoothing capacity device C1 just
Pole is connected with one end of load H.Also, the source electrode of MOSFET (Q2) is via wiring hd and shunt resistance R1 and smoothing capacity device C1
Cathode connect with the other end of load H, the source electrode of MOSFET (Q4) via wiring hd and smoothing capacity device C1 cathode and bear
Carry the other end connection of H.
Reactor L1 is arranged on wiring ha, that is, is arranged between AC power source VS and bridged rectifier circuit 10.Reactor
L1 puts aside the electric power supplied from AC power source VS for energy, and is boosted by discharging the energy.
Smoothing capacity device C1 makes the voltage smoothing after rectifying by MOSFET (Q1, Q2, Q3, Q4) become DC voltage
Vd.Smoothing capacity device C1 is connect with the outlet side of bridged rectifier circuit 10, and side of the positive electrode is connect with wiring hc, negative side and wiring hd
Connection.
According to the instruction from aftermentioned convertor controls portion 18 to the MOSFET (Q1, Q2, Q3, Q4) as switch element
Carry out ON/OFF control.By using MOSFET (Q1, Q2, Q3, Q4) as switch element, can be switched at high speed, and
And by making current flow through the small MOSFET of pressure drop, it is able to carry out so-called synchronous rectification control, can reduce circuit loss.
Here, MOSFET (Q1) has parasitic diode D11 inside it.Equally, MOSFET (Q2), MOSFET (Q3),
MOSFET (Q4) has parasitic diode D21, D31, D41 inside it.
By using the small super node MOSFET of conducting resistance as MOSFET (Q1, Q2, Q3, Q4), can further decrease
Conduction loss.Here, generating reverse recovery current in the parasitic diode of MOSFET in active movement.Especially exist with
Under problem: parasitic diode of the parasitic diode of super node MOSFET relative to common MOSFET, reverse recovery current is big,
Switching loss is big.Therefore, by using reverse recovery time (trr) small MOSFET as MOSFET (Q1, Q2, Q3, Q4),
It can reduce switching loss.
Shunt resistance R1 (current detecting part) detects the electric current (load) flowed through via wiring hd.But it is examined as electric current
Survey portion both can be used transformer, or Hall element also can be used etc..
Control portion of gain 12 has to the current control according to circuital current virtual value Is and DC voltage compression ratio a decision
The function that gain Kp is controlled.It at this moment, can be by DC voltage Vd from AC power source by controlling Kp × Is for predetermined value
Voltage Vs boosting is a times.
Alternating voltage test section 13 detects the AC supply voltage Vs applied from AC power source VS, and connects with wiring ha, hb
It connects.Alternating voltage test section 13 exports its detected value to zero crossing determination unit 14.
Zero crossing determination unit 14 determines the zero crossing of the positive and negative switching of AC power source.Specifically, zero crossing determination unit 14
For the value of the AC supply voltage Vs detected by alternating voltage test section 13, determine its it is positive and negative whether switch, i.e., whether
Zero cross point is reached.Zero crossing determination unit 14 is the polar Check up polarity portion for detecting AC supply voltage Vs.For example, zero hands over
The signal that determination unit 14 exports " 1 " during AC supply voltage Vs is positive to convertor controls portion 18 is pitched, in AC power source
Voltage Vs exports the signal of " 0 " to convertor controls portion 18 during being negative.
Load detecting portion 15 is for example made of shunt resistance, with the following functions: the electricity that detection is flowed through from AC power source VS
Stream, thus come detect to load H supply current value (load).In addition, can also lead in the case where loading H is motor
Overload test section 15 detects the revolving speed of motor, according to the estimating rotation speed current value (load).Load detecting portion 15 is examined
Measured value is output to step-up ratio control unit 16.
Step-up ratio control unit 16 selectes the step-up ratio 1/a of DC voltage Vd from the detected value in load detecting portion 15, by it
Selected results are output to convertor controls portion 18.Then, in order to DC voltage Vd is boosted to target voltage, convertor controls portion
18, to MOSFET (Q1, Q2) output driving pulse, thus carry out switch control.
DC voltage test section 17 detects the DC voltage Vd for being applied to smoothing capacity device C1, and positive side and wiring hc connect
It connects, negative side is connect with wiring hd.Its detected value is output to convertor controls portion 18 by DC voltage test section 17.In addition, direct current
Whether the voltage value that the detected value of voltage detection department 17 is used to determine to be applied to load H has reached scheduled target value.
Convertor controls portion 18 is, for example, microcomputer (Microcomputer, not shown), is read in ROM (read-only storage
Device) in the program that stores, use RAM (random access memory) as working storage, by CPU (central processing unit) execution
Various processing.Convertor controls portion 18 is according to from shunt resistance R1 (current detecting part), control portion of gain 12, zero crossing determination unit
14, the information that step-up ratio control unit 16 and DC voltage test section 17 input, controls the ON/OFF of MOSFET (Q1, Q2).
Convertor controls portion 18 is after the zero crossing of zero crossing determination unit 14 determines, in the voltage phase for detecting with being determined
In the case where anti-voltage, the inverting element protection act for turning off the inverting element of rectification side is executed.
The opposite polarity electricity for the supply voltage for determining and detecting after zero crossing determines is arranged in convertor controls portion 18
Press the reverse logic of (backward voltage) to determine section (aftermentioned), when X in reverse logic judgement section (X is arbitrary natural number)
In the case where the opposite polarity voltage of the secondary supply voltage for detecting and detecting, the inverting element of rectification side is turned off.
Convertor controls portion 18 determines in section in reverse logic, in the opposite polarity electricity with the supply voltage detected
When pressure is predetermined value or more, the inverting element by rectification side unrelated with detection number is turned off.
Convertor controls portion 18 by and then zero crossing determine after it is short-term between be set as ignoring sentencing for the disorder of supply voltage
Surely forbid section (aftermentioned), determine to detect and detect at X times in section in the reverse logic after section is forbidden in judgement
Supply voltage opposite polarity voltage in the case where, the inverting element of rectification side is turned off.
Convertor controls portion 18 is executing inverting element protection act, thus when the inverting element of rectification side becomes shutdown,
When detecting the positive negative actuation of normal power supply when zero crossing next time determines, by the movement of the inverting element of rectification side
Revert to connection control.That is, in the case where the inverting element of rectification side becomes shutdown, conduction loss increases, therefore under
Under the case where primary zero crossing detects the positive negative actuation of normal power supply when determining (the normal situation in next edge), become
The inverting element movement of rectification side is reverted to common control by parallel operation control unit 18.The section of the inverting element shutdown of rectification side
For the half period.
The case where convertor controls portion 18 is executing inverting element protection act, and the inverting element of rectification side becomes shutdown
Under, when detecting the positive and negative judgement of normal power supply with pre-determined number, the movement of the inverting element of rectification side is reverted to and is connect
Logical control (the inverting element movement of rectification side is reverted into common control).
<not detection interval (during not detecting)>
Fig. 9 indicates the waveform of supply voltage, respectively indicates not detection interval, putting near zero crossing in order since upper
Big waveform, the waveform amplification for being superimposed noise.
As shown in the figure of the not detection interval of Fig. 9, not detection interval is provided with after zero crossing judgement.Not detection zone
Between be zero crossing judgement after before the several seconds that next zero crossing will arrive until (10msec or so) during, even if
Have across voltage as zero crossing, be also judged as noise and during determining without zero crossing (rule just having in the past).
<reverse logic judgement section>
As Fig. 9 zero crossing near waveform amplification figure shown in, zero crossing judgement after be arranged for determining and detecting
Supply voltage opposite polarity voltage (backward voltage) (i.e. with the opposite polarity logic of the supply voltage detected)
Reverse logic determines section.Reverse logic determines that section is during setting in not detection interval, in the present embodiment, to be
During 1/3 or so of not detection interval after zero crossing judgement.However, it is also possible to which reverse logic is made to determine section and not detect
Section is consistent.Section is determined by setting reverse logic, be can determine and is excluded to make because of the variation of the supply voltages such as lightning surge
At abnormal zero crossing.
Convertor controls portion 18 (referring to Fig.1) reverse logic determine section in, zero crossing judgement after, X time detection and
The opposite polarity voltage of the supply voltage detected.If convertor controls portion 18 determines X inspection in section in reverse logic
The opposite polarity voltage for the supply voltage measured and detected, then turn off the inverting element of rectification side.The reversed electricity of X detection
Pressure, abnormal zero crossing is just determined as in the case where detecting for X times, thus, it is possible to prevent zero crossing caused by noise etc.
It falsely determines that as backward voltage.If reducing above-mentioned X (such as 1), abnormal zero crossing, Neng Gouxun can be determined rapidly
The component wear of the inverting element of rectification side is prevented fastly.But if reducing above-mentioned X, handed over by caused by noise etc. zero
In the case that fork mistake is determined as backward voltage, the inverting element that can not will need the rectification side of shutdown is turned off, and can not seek to mention
High efficiency.In addition, be able to maintain the connection of the inverting element of rectification side if increasing X, thus by this point it is possible to realize
It improves efficiency, but the judgement of abnormal zero crossing can be slack-off.If the judgement of abnormal zero crossing is slack-off, can not seek
The actual effect of element protection.
<section is forbidden in judgement>
As Fig. 9 zero crossing near waveform amplification figure shown in, determine in section in reverse logic, will and then zero crossing
It is set as determining to forbid section between short-term after judgement.Reverse logic determine section in it is initial during be easy superimposed noise.
For example, the reverse logic near zero crossing determines section, power supply electricity as shown in the waveform amplification figure for being superimposed noise of Fig. 9
Subsidiary noise in corrugating.Especially after the judgement of and then zero crossing, in rising edge (failing edge) power supply of mains voltage waveform
The value of voltage is small, therefore in the case where being superimposed noise, which becomes zero crossing.In this way, near zero crossing, even if not
It is lightning surge, also will do it reverse logic judgement, therefore detect backward voltage often, is easy mistakenly shutdown rectification
The inverting element of side can hinder efficiently to operate in this case.
Therefore, in the present embodiment, reverse logic determine section in, by and then zero crossing determine after it is short-term between
Section is forbidden in the judgement for being set as that reverse logic voltage is forbidden to determine.For example, such as the waveform amplification figure institute for being superimposed noise of Fig. 9
Show, by reverse logic determine section in by and then zero crossing determine after it is short-term between be set as determine forbid section, energy
It is enough to forbid the zero crossing in section to ignore as noise (referring to the appended drawing reference a) of Fig. 9 the judgement.In addition, by determining
Reverse logic after forbidding section determines to determine in section and the opposite polarity voltage of supply voltage that detects is (referring to Fig. 9
Appended drawing reference b).
Hereinafter, the movement for the continuous-current plant 1 that explanation is constituted as described above.
The case where continuous-current plant 1 has the case where carrying out full-wave rectification and is boosted by switch motion.For example,
In the case that the loads such as inverter, motor are big, need to boost to DC voltage Vd.
Boosting based on switch motion is the mode that converter carries out active movement, is by flowing bridged rectifier circuit 10
It crosses short circuit current and carries out the boosting of DC voltage Vd and the improved mode of power factor.
Firstly, illustrating the full-wave rectification movement of continuous-current plant 1.
<full-wave rectification movement>
By the polarity according to AC supply voltage Vs, switch control, Lai Jinhang are carried out to MOSFET (Q1, Q2, Q3, Q4)
Synchronous rectification control.
Fig. 2 is indicated in the polar situation that AC supply voltage Vs is positive in the electricity for carrying out flowing through circuit when full-wave rectification
Flow path.
As shown in Fig. 2, during the half period that AC supply voltage Vs is positive, electric current is to direction shown in dotted arrow
Flowing.That is, electric current according to AC power source VS → reactor L1 → MOSFET (Q1) → smoothing capacity device C1 → shunt resistance R1 →
MOSFET (Q4) → AC power source VS sequential flowing.At this moment, MOSFET (Q1) is always on-state, and MOSFET (Q2) is always
For off state.
By making MOSFET (Q2) be always off state, current path shown in the dotted line of Fig. 2 is formed.In addition, making
MOSFET is as follows the reasons why (Q1) is always on-state.Assuming that in the case where MOSFET (Q1) is not to turn on state, Fig. 2's
Current path shown in dotted line does not change, but electric current flows through the parasitic diode D11 of MOSFET (Q1).But usually
The characteristic of the parasitic diode of MOSFET is poor, therefore can generate big conduction loss.Therefore, MOSFET (Q1) is connected,
Electric current is flowed through between the Drain-Source of MOSFET (Q1), thus, it is possible to seek to reduce conduction loss.This is so-called synchronous rectification
The principle of control.
The timing that ON Action as MOSFET (Q1) starts is switched to just from the polarity of AC supply voltage Vs from negative
The timing of zero crossing start to carry out.It is the polarity of AC supply voltage Vs from tangent as the timing of shutdown MOSFET (Q1)
Change to negative timing (referring to MOSFET (Q1) signal of aftermentioned Fig. 6).
According to relational between DC voltage Vd and AC supply voltage Vs, in order to reduce conduction loss, as rectification
When the MOSFET (Q4) of the inverting element of side has connection with shutdown, but current path is constant.Although current path
It is constant, but if connecting MOSFET (Q4) can drop then compared with the case where flowing through the parasitic diode D41 of MOSFET (Q4)
Low conduction loss.
Fig. 3 is indicated in the polar situation that AC supply voltage Vs is negative in the electricity for carrying out flowing through circuit when full-wave rectification
Flow path.
As shown in figure 3, during the half period that AC supply voltage Vs is negative, electric current is to direction shown in dotted arrow
Flowing.That is, electric current is according to AC power source VS → MOSFET (Q3) → smoothing capacity device C1 → shunt resistance R1 → MOSFET (Q2)
→ reactor L1 → AC power source VS sequential flowing.At this point, MOSFET (Q2) is always on-state, MOSFET (Q1) is always
For off state.
By making MOSFET (Q1) be always off state, current path shown in the dotted line of Fig. 3 is formed.In addition, passing through
MOSFET (Q2) is connected, flows through electric current between the Drain-Source of MOSFET (Q2), prevents from flowing to parasitic diode D21,
Seek to reduce conduction loss.
The timing that ON Action as MOSFET (Q2) starts, it is negative from being just switched to from the polarity of AC supply voltage Vs
The timing of zero crossing start to carry out.As the timing for turning off MOSFET (Q2), the polarity for being AC supply voltage Vs is from negative
It is switched to positive timing (referring to MOSFET (Q2) signal of aftermentioned Fig. 6).
According to the relational of DC voltage Vd and AC supply voltage Vs, in order to reduce conduction loss, as rectification side
When the MOSFET (Q3) of inverting element has connection with shutdown, but current path is constant.Current path is although constant,
But if connecting MOSFET (Q3) can reduce conducting then compared with the case where flowing through the parasitic diode D31 of MOSFET (Q3)
Loss.
This concludes the description of according to the polarity of supply voltage carry out full-wave rectification when electric current flowing and MOSFET (Q1,
Q2, Q3, Q4) switch motion.
<high-speed switch movement>
Then, illustrate that high-speed switch acts.
In high-speed switch action mode, switch control is carried out to MOSFET (Q1, Q2) with some switching frequency, makes circuit
Thus short circuit current flow carries out the boosting of DC voltage Vd and the improvement of power factor.
<making movement when short circuit>
Movement when illustrating to make short circuit.
The flowing that electric current when full-wave rectification is carried out in the period that AC supply voltage Vs is positive is as shown in Figure 2,
The movement of MOSFET (Q1, Q2) is as described above.
Fig. 4 is indicated in the polar situation that AC supply voltage Vs is positive, and has made to flow through in circuit when short circuit
Current path.Fig. 4 indicates the short circuit current isp for flowing through MOSFET (Q2) when connecting in the period that AC supply voltage Vs is positive
Path.
As shown in figure 4, the path as short circuit current isp, be AC power source VS → reactor L1 → MOSFET (Q2) →
MOSFET (Q4) → AC power source VS sequence.At this point, putting aside energy in reactor L1, then, which is released to smoothly
Thus capacitor C1 boosts to DC voltage Vd.
The flowing of electric current when carrying out full-wave rectification in the period that AC supply voltage Vs is negative is as shown in Figure 3, MOSFET
The movement of (Q1, Q2) is as described above.
Fig. 5 is indicated in the polar situation that AC supply voltage Vs is negative, and has made to flow through in circuit when short circuit
Current path.Fig. 5 indicates to connect MOSFET (Q1) to short circuit current flow isp in the period that AC supply voltage Vs is negative
When path.
As shown in figure 5, the path as electric current, is AC power source VS → MOSFET (Q3) → MOSFET (Q1) → reactor
The sequence of L1.At this point, also described above, energy is put aside in reactor L1, then, by the energy to DC voltage Vd into
Row boosting.Hereinafter, MOSFET (Q1, Q2) is known as step-up side inverting element in the explanation of movement, by MOSFET (Q3, Q4)
Referred to as rectification side inverting element.
Continuous-current plant 1 repeats full-wave rectification movement (rectification mode) and short circuit movement (short-circuit mode) comes
It boosts.The MOSFET of connection is positive and negative and different according to AC supply voltage Vs's.Zero crossing determination unit 14 (referring to Fig.1) is sentenced
Determine the zero crossing of power supply, convertor controls portion 18 according to the judgement of zero crossing determination unit 14, determine the MOSFET to be connected (Q1,
Q2、Q3、Q4)。
But such as when producing the big disorder of supply voltage as lightning surge, if zero crossing determination unit 14
Zero cross detection is carried out, then the positive and negative zero crossing of power supply determines result and is actually applied to the positive negative of the voltage of MOSFET sometimes
Instead.In the case where zero crossing determines that result is opposite with the voltage for being actually applied to MOSFET, the member that should be connected of MOSFET
Part mismatches.Apply the member of high voltage in the switching timing of rectification mode → short-circuit mode (boost mode) specifically, having
Part (such as MOSFET (Q3), MOSFET (Q4)), the element are possible to damage because being more than component pressure.
Hereinafter, referring to Fig. 6~Fig. 8 illustrate to determine due to the positive and negative zero crossing of the power supplys such as lightning surge result with it is actually applied
To the positive and negative opposite situation of the voltage of MOSFET.
<zero crossing determines and not detection interval>
Fig. 6 indicates the signal sent in AC supply voltage disorder to the inverting element of rectification side, starts from above by suitable
Sequence respectively indicate the power supply voltage signal that disorder has occurred, zero cross signal, MOSFET (Q3) signal, MOSFET (Q4) signal,
MOSFET (Q1) signal, MOSFET (Q2) signal.(Q3) signal and (Q4) signal respectively indicate connecing for the inverting element of rectification side
The waveform of messenger.In addition, MOSFET (Q1) and MOSFET (Q2) do not act stopping.
In addition, the ghost line in the figure of the power supply voltage signal of Fig. 6 is supply voltage when supply voltage does not have disorder
Waveform.
As shown in the figure of the zero cross signal of Fig. 6, the zero crossing determination unit 14 (referring to Fig.1) of continuous-current plant 1
Determine the zero crossing of the positive and negative switching of AC power source.Here, the scheduled period after the judgement of and then zero crossing, setting do not detect
Section (referring to the arrow of the zero cross signal of Fig. 6).Not detection interval be zero cross signal judgement after do not determine it is unwanted
The section of zero cross signal, was just provided in the past.By the way that not detection interval is arranged, prevent from carrying out undesirable unwanted zero friendship
Fork determines.
Not detection interval is set as period corresponding with the positive and negative switching timing of AC power source.Therefore, sentence in zero crossing
After fixed, next zero crossing determines to usually become the positive and negative switching time point of next AC power source.The change of continuous-current plant 1
Parallel operation control unit 18 (microcomputer) is determined based on the zero crossing, carries out the switch control of MOSFET (Q1, Q2, Q3, Q4).Cause
This, convertor controls portion 18 is opened until obtaining next zero crossing and determining result based on current zero crossing judgement
Close control.Therefore, convertor controls portion 18, even if AC power source has any exception, is not being detected after zero crossing judgement
Before next zero crossing behind section determines, the exception of AC power source can not be grasped, (such as is rectified according to the sequence determined
Mode → short-circuit mode) common switch control is carried out to MOSFET (Q1, Q2, Q3, Q4).
The exception of above-mentioned AC power source is caused by lightning surge etc., generate supply voltage disorder (supply voltage it is positive and negative
Reversion etc.).The disorder of supply voltage caused by lightning surge etc. is burst, sometimes the also generation or tight when zero crossing determines
With occurring thereafter.
<reverse logic judgement section>
As shown in the figure of the zero cross signal of Fig. 6, after zero crossing judgement, the electricity for determining and detecting is set
The reverse logic of the opposite polarity voltage (backward voltage) of source voltage determines section.Convertor controls portion 18 (referring to Fig.1) exists
Reverse logic determines the opposite polarity voltage of X detection and the supply voltage detected in section.
The appended drawing reference zero of Fig. 6 × expression zero crossing determination unit 14 (referring to Fig.1) is carried out in each predetermined timing (s grades of μ)
Zero crossing determine.The appended drawing reference zero of Fig. 6 is the electricity for determining in section and to detect in reverse logic after zero crossing judgement
The judgement result (normal) of the opposite polarity voltage of source voltage, the appended drawing reference of Fig. 6 × it is to determine in section in reverse logic
With the judgement result (exception) of the opposite polarity voltage of the supply voltage detected.But zero crossing at this time is likely to be
Abnormal zero crossing caused by the noise being superimposed in supply voltage.
If convertor controls portion 18 determines in section in reverse logic, X supply voltage for detecting and detecting
Opposite polarity voltage then turns off the inverting element of rectification side.For example, in the case where being set as X times=3 times, such as the zero of Fig. 6
Shown in the figure of crossbar signal like that, patrol identical with the polarity of the supply voltage detected is detected 3 times after zero crossing judgement
When judgement result (appended drawing reference × of Fig. 6) collected, the inverting element for turning off rectification side (is herein Q3).
<section is forbidden in judgement>
As shown in the figure of the zero cross signal of Fig. 6, determine in section in reverse logic, will and then zero crossing determine
It is set as determining to forbid section between afterwards short-term.Zero crossing determination unit 14 is determining that section is forbidden to determine without zero crossing.Or
The knot that zero crossing determination unit 14 determines in the zero crossing for determining that section is forbidden to carry out is ignored and (is not used) in person, convertor controls portion 18
Fruit.
<when usual (when not generating the big disorder of supply voltage)>
Convertor controls portion 18 is negative usual (when not generating the big disorder of supply voltage) in AC supply voltage Vs
Period carries out above-mentioned full-wave rectification shown in Fig. 3.Then, the period being positive in AC supply voltage Vs flows through above-mentioned Fig. 4 institute
The short circuit current shown.
<when abnormal (when generating the big disorder of supply voltage)>
As shown in the figure of the power supply voltage signal of Fig. 6, due to lightning surge etc., supply voltage produces big disorderly
Disorderly.In the example of fig. 6, it is influenced from when being just switched to negative by lightning surge in supply voltage, in the negative of supply voltage
Side, the disorder vibrated with producing the polarity of supply voltage (referring to the section t1~t5).That is, in the section t1 of Fig. 6, electricity
Source voltage is sharply vibrated to negative side.Similarly, in the section t2 of Fig. 6, supply voltage sharply vibrates in short time to positive side,
In the section t3 of Fig. 6, supply voltage sharply vibrates in short time to negative side, and in the section t4 of Fig. 6, supply voltage is short to positive side
It temporally sharply vibrates, in the section t5 of Fig. 6, supply voltage sharply vibrates in short time to negative side.In the section t1 of Fig. 6,
Supply voltage is negative, is negative side identical with original polarity, but becomes excessive supply voltage.In the area t2, t4 of Fig. 6
Between, it should be that the polar place reversion of negative side is positive.
As shown in the figure of the zero cross signal of Fig. 6, zero cross signal is the judgement of the positive and negative switching of supply voltage, because
This is different from original normal zero cross signal, and the polarity disorder by supply voltage is influenced and generates abnormal zero crossing
Signal.For example, as shown in the figure of the power supply voltage signal of Fig. 6, switching point in each section of t1~t5 of Fig. 6, with this
Carry out normal zero cross signal difference, generates the abnormal zero crossing letter for the influence of polarity disorder for receiving supply voltage
Number.It incidentally, can if convertor controls portion 18 switches inverting element based on such abnormal zero cross signal
Incur the damage of the inverting element of rectification side as described below.But even if abnormal zero cross signal is generated, due to above-mentioned
Not detection interval does not become yet and determines for the zero crossing of switch control.
Fig. 7 and current path when becoming opposite Fig. 8 shows the connection of MOSFET and supply voltage.Fig. 7 is indicated about change
Change element be determined as supply voltage be it is negative and have issued in the case where rectified signal due to lightning surge etc. make supply voltage at
The polarity chron being positive flows through the current path of circuit.In addition, Fig. 8 shows be determined as that supply voltage is to bear and send out about inverting element
Go out in the case where short-circuit signal since lightning surge etc. makes supply voltage become the electric current road that positive polarity chron flows through circuit
Diameter.
Fig. 7 is figure corresponding with above-mentioned Fig. 3, is indicated in the period for being determined as that supply voltage is negative based on zero crossing judgement
And it has issued and flows through circuit since lightning surge etc. makes AC supply voltage become positive polarity chron in the case where rectified signal
Current path.
In the case where the big disorder of the supply voltage as no lightning surge, convertor controls portion 18 carries out power supply electricity
The full-wave rectification when period being negative is pressed, therefore carries out the on or off of MOSFET (Q1, Q2, Q3, Q4) shown in Fig. 3.As a result,
Form AC power source VS → MOSFET (Q3) → smoothing capacity device C1 → shunt resistance R1 → MOSFET shown in the dotted line of Fig. 3
(Q2) → reactor L1 → AC power source VS current path.
But, it is assumed that in the case that judgement shown in Fig. 3 has issued rectified signal for the period that supply voltage is negative,
Since lightning surge etc. makes supply voltage become positive polarity (referring to the section t2, t4 of Fig. 6).
The polarity of the parenthesized supply voltage of Fig. 7 is the pole for being determined based on zero crossing by convertor controls portion 18 and being determined
Property (polarity of normal supply voltage shown in Fig. 3), not parenthesized polarity is since lightning surge etc. makes supply voltage
Polarity as positive polar actual supply voltage.Convertor controls portion 18 (microcomputer) is based on zero cross detection, if
For polarity identical with the positive and negative polarity of AC supply voltage Vs shown in Fig. 3, i.e. with bracket indicate positive and negative in Fig. 7
Polar symbol carries out switch to MOSFET (Q1, Q2, Q3, Q4) to carry out full-wave rectification.
But due to lightning surge etc., actual supply voltage becomes positive polarity (referring to the section of t2, t4 of Fig. 6),
Therefore the electric current not flowing of direction shown in the dotted arrow to Fig. 3.That is, the on or off state of MOSFET (Q1, Q2, Q3, Q4)
It is identical as Fig. 3 and Fig. 7, but the polarity of supply voltage and Fig. 3 and Fig. 7, on the contrary, therefore as shown in the dotted arrow of Fig. 7, electric current is only
On the road AC power source VS → reactor L1 → MOSFET (Q2) → MOSFET (Q4) parasitic diode D41 → AC power source VS
It is flowed in diameter.In addition, even if MOSFET (Q2) is connected, since smoothing capacity device C1 has polarity, not from MOSFET (Q2)
It is flowed to smoothing capacity device C2.Therefore, after zero crossing judgement, supply voltage is being made to become positive pole due to lightning surge etc.
Property in the case where (referring to Fig. 6 the section t2, t4), electric current become via MOSFET (Q4) in an off state two pole of parasitism
Pipe D41 forcibly returns to the state of the side AC power source VS.Pass through after zero crossing judgement about the switch motion of the MOSFET
Detection interval is not set until carrying out zero crossing judgement next time to be identical shown in the figure of the zero cross signal of Fig. 6
It is fixed.
Then, determine to be determined as electricity (referring to the end in the section t5 of Fig. 6) by the zero crossing after not detection interval
The period that source voltage is positive is transferred to Fig. 8 from Fig. 7, but leads to the problem of herein following.
As shown in the dotted arrow of Fig. 7, if flowing through the state of the parasitic diode D41 of MOSFET (Q4) from electric current, cut
Short-circuit mode shown in Fig. 8 (boost mode) is changed to, then when becoming current path shown in Fig. 8, sometimes at MOSFET (Q4)
Middle generation Irr (reverse recovery current: reverse recoverycurrent), to MOSFET (Q4) apply voltage on jump from
And it is more than component pressure, so that MOSFET (Q4) is damaged.
In addition, sometimes due to the disorder of supply voltage and to more application high voltages of MOSFET, in this case, lead to member
The temperature of part steeply rises, or even damage element.Also, as shown in Figure 7 and Figure 8, in any of rectification mode and short-circuit mode
Under one mode, all without the current path for passing through shunt resistance R1 (current detecting part), current detecting result reflects less than control
In system, therefore control becomes unstable, it is possible to cause malfunction.
In the present embodiment, the convertor controls portion 18 of continuous-current plant 1 is after the judgement of zero crossing determination unit 14,
In the case where the voltage that the voltage for detecting with determining is opposite, the inverting element for turning off the inverting element of rectification side is executed
Protection act.The inverting element of rectification side is protected as a result,.Hereinafter, illustrating inverting element protection act.
In the present embodiment, convertor controls portion 18 (referring to Fig.1) is being detected after the judgement of zero crossing determination unit 14
Out in the case where the voltage opposite with the voltage determined (backward voltage), executes and close the inverting element (Q3, Q4) of rectification side
Disconnected inverting element protection act.Not detection zone as shown in the figure of the zero cross signal of Fig. 6, after zero crossing judgement
Between, in the case where producing reversed voltage due to any (referring to the section t2, t4 of Fig. 6), it is being set as X times
At=1 time, stop the connection signal of the inverting element of rectification side.In addition, when being set as X times=3 times, such as the zero crossing of Fig. 6
Shown in the figure of signal like that, after zero crossing judgement, logic identical with the polarity of the supply voltage detected is detected at 3 times
Judgement result (appended drawing reference × of Fig. 6) when, the inverting element (Q3) of rectification side is turned off.
Here, stopping the connection of the inverting element (Q3) of rectification side as shown in the figure of MOSFET (Q3) signal of Fig. 6
Signal.In order to keep efficiency good, connect the inverting element of rectification side.Therefore, even if the inverting element (Q3) of rectification side turns off,
It will also pass through parasitic diode, therefore as continuous-current plant 1 or air conditioner 1000 (aftermentioned), without problem transport
Turn.
But by the way that the inverting element (Q3) of rectification side is turned off, deterioration of efficiency.It is therefore preferable that the transformation member of rectification side
Part (Q3) turn off during it is short (during stopping), but if make it is too short during above-mentioned shutdown, sometimes again mistakenly into
Row zero crossing determines, can not seek the actual effect of inverting element protection act.Also superimposed noise ingredient in supply voltage, therefore be not
The above-mentioned backward voltage of one-time detection, but the inverting element (Q3) of rectification side is turned off by multiple detection.
For example, as shown in the figure of the zero cross signal of Fig. 6, not detection interval after zero crossing judgement, at X times
In the case where the contrary logic that (such as the appended drawing reference of Fig. 6 × be third time) detects and detect, shutdown rectification
The inverting element (Q3) of side (referring to the figure of MOSFET (Q3) signal of Fig. 6).
Then, as shown in the figure of the zero cross signal of Fig. 6, when being normal electricity when zero crossing next time determines
In the case where the period (period being positive herein) of source voltage, restart the connection control of the inverting element (Q4) of rectification side
(referring to the figure of MOSFET (Q4) signal of Fig. 6).
The shutdown control of the inverting element of the rectification side in above-mentioned inverting element protection act is summarized as follows and is connect
Logical control restarts.
<elemental motion>
Convertor controls portion 18 is after the judgement of zero crossing determination unit 14, in the opposite electricity of the voltage for detecting with determining
In the case where pressure, the inverting element protection act for turning off the inverting element of rectification side is executed.
<control response>
After the judgement of zero crossing determination unit 14, in the case where the voltage that the voltage for detecting with determining is opposite, such as
Fruit executes inverting element protection act at once, then can more quickly prevent the damage of the inverting element of rectification side.For example, as schemed
Shown in the figure of 6 zero cross signal like that, the contrary logic for detecting and detecting for the first time after zero crossing judgement
In the case where, the inverting element (Q3) of rectification side is turned off, thus, it is possible to promptly prevent the element of the inverting element of rectification side from damaging
It is bad.
<noise, efficiency and control stability take into account>
But as shown in the figure of the power supply voltage signal of Fig. 6, because of the polarity of supply voltage caused by lightning surge etc.
Disorder it is irregular due to the generation situation of surge, supply voltage also superimposed noise (referring to Fig. 9 zero crossing near amplification
Waveform diagram), therefore above-mentioned backward voltage is abnormal zero crossing sometimes.The inverting element for turning off rectification side can be damaged due to conducting
The increase of consumption and cause efficiency to reduce, therefore, above-mentioned backward voltage first time detection be mistake in the case where, if shutdown
The inverting element (Q3) of rectification side, then incurring corresponding efficiency reduces.
Therefore, in the present embodiment, convertor controls portion 18 is after the judgement of zero crossing determination unit 14, in reverse logic
(the waveform amplification figure near the zero crossing of reference Fig. 9) is determined in section, and repeated detection goes out the electricity opposite with the voltage determined
In the case where pressure, the inverting element of rectification side is turned off.For example, sentencing as shown in the figure of the zero cross signal of Fig. 6 in zero crossing
After fixed, the opposite polarity voltage for the supply voltage that X times (such as 3 times) are detected and detected just turns off the transformation of rectification side
Element (Q3) (referring to the figure of MOSFET (Q3) signal of Fig. 6).The member in supply voltage in the environment of superimposed noise can be taken into account
Efficiency caused by the protection of part and conduction loss reduce improves.
In addition, convertor controls portion 18 determines after the judgement of zero crossing determination unit 14 in reverse logic as variation
In section (referring to Fig. 9 zero crossing near waveform amplification figure), the voltage opposite with the voltage determined be predetermined value with
When upper, the inverting element of rectification side was turned off.The protection of the element in supply voltage in the environment of superimposed noise can be taken into account and led
Efficiency caused by logical loss reduces improves.
In addition, convertor controls portion 18 determines in section in reverse logic as variation, will and then zero crossing determine
Be set as ignoring between afterwards short-term the disorder of supply voltage judgement forbid section (referring to Fig. 9 zero crossing near amplification wave
Shape figure), after it have passed through the judgement and forbid section, (the amplification near zero crossing referring to Fig. 9 is determined in section in reverse logic
Waveform diagram) carry out zero crossing judgement after, in the case where the opposite polarity voltage for the supply voltage for detecting and detecting, close
The inverting element of disconnected rectification side.Cope with the case where supply voltage is easy disorder near zero crossing.
<connecting control to restart>
Convertor controls portion 18 is executing inverting element protection act, thus the case where the inverting element shutdown of rectification side
Under, when detecting the positive negative actuation of normal power supply when zero crossing next time determines, keep the inverting element of rectification side dynamic
Revert to common control.For example, as shown in the figure of MOSFET (Q3) signal of Fig. 6, it is normal at next edge
In the case of, so that the movement of the inverting element (Q4) of rectification side is reverted to common control.Rectification side can promptly be restarted
Inverting element (Q4) connection control to seek to improve efficiency.
In addition, convertor controls portion 18 is detected when zero crossing next time determines with pre-determined number as variation
Out in the case where normal zero cross signal, restart the connection control of the inverting element of rectification side.It can take into account and be based on making an uproar
The control stability and efficiency of sound ingredient.
<voltage rising prevents>
The grid resistance constant of the inverting element (MOSFET (Q3, Q4)) of rectification side is set to be greater than the inverting element of step-up side
The grid resistance constant of (MOSFET (Q1, Q2)).The electricity that thereby, it is possible to prevent from applying to the inverting element (Q3, Q4) of rectification side
Pressure steeply rises, and carries out the protection of the inverting element (Q3, Q4) of rectification side.
It uses above and is being determined as that power supply is negative and has issued rectified signal (referring to Fig. 7)/short circuit about inverting element
When signal (referring to Fig. 8), son illustrates connection and the power supply electricity of MOSFET in case where the polarity that AC supply voltage is positive
Current path when buckling obtains opposite.But it is being determined as that power supply is positive and has issued rectified signal/short circuit about inverting element
When signal, even if in the polar situation that AC supply voltage is negative, the inverting element protection act that performs equally.At this
In the case of, by the way that the inverting element (Q4) of rectification side is turned off, come prevent rectification side inverting element component wear.Then,
The case where detecting the positive negative actuation of normal power supply when zero crossing next time determines (or detected just with pre-determined number
The case where positive and negative judgement of normal power supply) under, so that the inverting element (Q4) of rectification side is returned as common control.
[movement of air conditioner and continuous-current plant]
Figure 10 is the front elevation of the indoor unit of the air conditioner of present embodiment, outdoor unit and remote controler.Such as Figure 10 institute
Show, air conditioner 1000 is so-called room conditioning, has indoor unit 100, outdoor unit 200, remote controler Re, direct current (not shown)
Source device 1 (referring to Fig.1).Indoor unit 100 is connect with outdoor unit 200 by refrigerant piping 300, is followed by well known refrigerant
Ring, to the indoor carry out air conditioning for being provided with indoor unit 100.In addition, indoor unit 100 and outdoor unit 200 are via communication cable
(not shown) mutually receives and sends messages.Continuous-current plant 1 supplies direct current power to the indoor unit 100 and outdoor unit 200.
Remote controler Re sends infrared signal by user's operation, to the remote controler receiving and transmitting part Q of indoor unit 100.The infrared ray
The content of signal is to operate the instructions such as request, the change of set temperature, timer, the change of operation mode, stopping request.Air-conditioning
Machine 1000 carries out the operation of air conditioner such as refrigeration mode, heating mode, dehumidification mode according to the instruction of these infrared signals.In addition,
Indoor unit 100 sends the data such as room temperature information, humidity information, electricity charge information from remote controler receiving and transmitting part Q to remote controler Re.
Illustrate the process of the movement for the continuous-current plant 1 installed in air conditioner 1000.Continuous-current plant 1 is based on
The efficiently reduction of the higher harmonic current of movement and power-factor improvement and the boosting of DC voltage Vd.In addition, as movement
Mode, as described above, having full-wave rectification movement, high-speed switch acts, partial switch acts this 3 action modes.
For example, if load is small, being needed in the case where considering the inverter of air conditioner 1000, motor as load H
The operating for pay attention to efficiency, then act continuous-current plant 1 under full-wave rectification mode.If load is big,
It is boosted and ensures power factor, then continuous-current plant 1 is made to carry out high-speed switch movement.In addition, such as air-conditioning
It is such when the specified operating of machine 1000, as load and less greatly but is being boosted, ensures the case where power factor
Under, so that continuous-current plant 1 is carried out partial switch movement.
Specified operating refers to " the T1 condition of JISB8615-1 table 1 (refrigerating capacity experimental condition) recorded in JISC9612
Under operating ".Specifically, being described in the Section 5 " refrigeration test " and Section 6 " heating test " of JISB8615-1
Temperature condition.High loaded process is, for example, " operating under the overload operating condition recorded in JISB8615-1 ", but as long as being
Input the operation range bigger than specified operating.Centre operating refers to " running ability of the half of specified operating ", records
In JISC9612.
In the case where threshold value #1, #2 is arranged to load and considers air conditioner 1000 as equipment, in load is small
Between region, continuous-current plant 1 carry out full-wave rectification, partial switch is carried out in specified operating, as needed carry out high speed open
It closes.
In bigger low temperature heating operation range of the specified operating of duty ratio etc., continuous-current plant 1 carries out high-speed switch,
Partial switch is carried out as needed.
As described above, continuous-current plant 1 is switched to optimal movement corresponding with the operation range of air conditioner 1000
Mode, thus, it is possible to higher harmonic current is reduced while efficiently being acted.
In addition, in the case where loading H is inverter, motor etc., it, can as the parameter for determining the size of load
To consider to flow through the revolving speed of inverter, the electric current of motor, the modulation rate of inverter, motor.It is flowed through alternatively, it is also possible to basis
The circuital current is of continuous-current plant 1 come judge load H size.For example, if load size be threshold value #1 with
Under, then continuous-current plant 1 carries out full-wave rectification, if it exceeds threshold value #1, then carry out partial switch.Alternatively, if load
Size is more than threshold value #2, then continuous-current plant 1 carries out high-speed switch, if it is threshold value #2 hereinafter, then carrying out partial switch.
As described above, continuous-current plant 1 is switched to optimal action mode corresponding with the size of load, thus, it is possible to
It is enough that higher harmonic current is reduced while efficiently being acted.
As described above, the continuous-current plant 1 (referring to Fig.1) of the air conditioner 1000 of present embodiment has:
Bridged rectifier circuit 10, inverting element (Q3, Q4) and switch element (Q1, Q2) to rectification side carry out bridging and connect；Reactance
Device L1 is arranged between AC power source Vs and bridged rectifier circuit 10；Smoothing capacity device C1, is connected to bridged rectifier circuit
10 outlet side smooths the voltage applied from bridged rectifier circuit 10；Zero crossing determination unit 14 determines alternating current
The zero crossing of the positive and negative switching of source Vs；Convertor controls portion 18 is detecting and institute after the judgement of zero crossing determination unit 14
In the case where the opposite voltage of the voltage of judgement, the inverting element protection act for turning off the inverting element of rectification side is executed.
With this configuration, it is influenced by being struck by lightning so that original the positive and negative of AC supply voltage Vs becomes opposite feelings
Under condition, in the timing for being switched to short-circuit mode (boost mode) from rectification mode, the inverting element of rectification side is turned off, thus, it is possible to
Prevent the component wear of the inverting element of rectification side.In addition, when detecting normal power supply when next zero crossing determines
Under the case where positive negative actuation (or the case where detecting the positive and negative judgement of normal power supply with pre-determined number), make the change of rectification side
It changes element and reverts to common connection control.Even if when there is lightning surge, protect the control of inverting element can also work from
And can prevent from damaging, persistently being controlled while the movement of continuous-current plant 1 or air conditioner 1000 can not be stopped.
In addition, in the present embodiment, illustrating the example for using SJ-MOSFET as MOSFET (Q1, Q2, Q3, Q4).
MOSFET (Q1, Q2, Q3, Q4) is used as by using SiC (silicon carbide)-MOSFET, can be realized the movement of higher efficiency.
In addition, being capable of providing a kind of energy efficiency by having continuous-current plant 1 of the invention in air conditioner 1000
(i.e. APF) is high, furthermore the air conditioner 1000 of high reliablity.Continuous-current plant 1 of the invention is installed to other than air conditioner
Equipment is also capable of providing the high equipment of high efficient and reliable.
Present invention is not limited to the embodiments described above, includes various modifications example.For example, for easy understanding illustrating this hair
It is bright and above embodiment is described in detail, but it is not necessarily limited to the entire infrastructure for having illustrated.It can be by certain embodiment party
A part of the structure of formula is replaced into the structure of other embodiments, can also be to other the additional implementations of the structure of certain embodiment
The structure of mode.Addition/deletion/displacement of other structures is carried out alternatively, it is also possible to a part of the structure to each embodiment.
Such as a part of the above-mentioned each structure of the hardware realizations such as integrated circuit, function, processing unit, processing unit etc. can be used
Or all.It can also be realized by being explained by processor and being executed for realizing the program of each function with software mode above-mentioned
Each structure, function etc..The record such as memory, hard disk can will be placed on for realizing information such as the program of each function, table, files
In the recording mediums such as device or flash memory card, DVD (digital versatile disc).
In the above-described embodiment, there is shown think to be necessary control line, information wire in explanation, but might not limit
In representing whole control lines, information wire on product.In fact, it is also contemplated that most structure is connected with each other
Get up.
Description of symbols
1: continuous-current plant；10: bridged rectifier circuit (rectification circuit)；11: current detecting part；12: control portion of gain；
13: alternating voltage test section；14: zero crossing determination unit (Check up polarity portion)；15: load detecting portion；16: step-up ratio control unit；
17: DC voltage test section；18: convertor controls portion (control unit)；100: indoor unit；200: outdoor unit；300: refrigerant is matched
Pipe；1000: air conditioner；Q1, Q2:MOSFET (first switching element and second switch element)；Q3, Q4:MOSFET (the first transformation
Element and the second inverting element)；Vs: AC power source；L1: reactor；C1: smoothing capacity device；R1: shunt resistance (current detecting
Portion)；Ha, hb, hc, hd: wiring；Re: remote controler.
Claims (9)
1. a kind of continuous-current plant, which is characterized in that have:
Rectification circuit, by the switch element being arranged in rectification side i.e. the first inverting element and the second inverting element and first
Switch element and second switch element carry out bridging and connect；
Reactor is arranged between AC power source and above-mentioned rectification circuit；
Smoothing capacity device is connected to the outlet side of above-mentioned rectification circuit, carries out to the voltage applied from above-mentioned rectification circuit flat
Cunningization；
Zero crossing determination unit determines the zero crossing of the positive and negative switching of AC power source；
Control unit, in the voltage that the voltage for detecting with being determined is opposite, is held after the judgement of above-mentioned zero crossing determination unit
It is about to above-mentioned first inverting element of rectification side and the inverting element protection act of above-mentioned second inverting element shutdown.
2. continuous-current plant according to claim 1, which is characterized in that
The reversed of the opposite polarity voltage for the supply voltage for determining and detecting after zero crossing determines is arranged in above-mentioned control unit
Logic decision section,
Determine in section in above-mentioned reverse logic, the opposite polarity voltage for the supply voltage for detecting and detecting at X times
In the case of, above-mentioned first inverting element and above-mentioned second inverting element of above-mentioned control unit shutdown rectification side,
X is arbitrary natural number.
3. continuous-current plant according to claim 1, which is characterized in that
The reversed of the opposite polarity voltage for the supply voltage for determining and detecting after zero crossing determines is arranged in above-mentioned control unit
Logic decision section,
Determine in section in above-mentioned reverse logic, is predetermined value or more in the voltage opposite with the voltage of the supply voltage detected
When, above-mentioned first inverting element and above-mentioned second inverting element of above-mentioned control unit shutdown rectification side.
4. continuous-current plant according to claim 1, which is characterized in that
Above-mentioned control unit by and then zero crossing determine after it is short-term between be set as determine forbid section,
The electricity for detecting and detecting at X times in section is determined in the above-mentioned reverse logic after section is forbidden in above-mentioned judgement
In the case where the opposite polarity voltage of source voltage, above-mentioned first inverting element of above-mentioned control unit shutdown rectification side and above-mentioned the
Two inverting elements,
X is arbitrary natural number.
5. continuous-current plant according to claim 1, which is characterized in that
Above-mentioned control unit is executing above-mentioned inverting element protection act to above-mentioned first inverting element of rectification side and above-mentioned the
In the case that two inverting elements become shutdown, when the positive negative actuation for detecting normal power supply when zero crossing next time determines
When, so that the movement of above-mentioned first inverting element and above-mentioned second inverting element of rectification side is reverted to connection control.
6. continuous-current plant according to claim 1, which is characterized in that
Above-mentioned control unit is executing above-mentioned inverting element protection act to above-mentioned first inverting element of rectification side and above-mentioned the
In the case that two inverting elements become shutdown, when detecting the positive and negative judgement of normal power supply with pre-determined number, make rectification side
The movement of above-mentioned first inverting element and above-mentioned second inverting element revert to connection control.
7. continuous-current plant according to claim 1, which is characterized in that
Above-mentioned first inverting element of rectification side and the grid resistance constant of above-mentioned second inverting element are greater than the first of step-up side
The grid resistance constant of switch element and second switch element.
8. continuous-current plant according to claim 1, which is characterized in that
Above-mentioned control unit is executed with the polarity of the voltage of above-mentioned AC power source synchronously to above-mentioned first switching element and above-mentioned the
Two switch elements are bidirectionally switched to make current flow through the synchronous rectification of load control, and the half of above-mentioned AC power source
Repeating during period controls the short circuit of above-mentioned reactor short circuit above-mentioned AC power source.
9. a kind of air conditioner, which is characterized in that have continuous-current plant described in any one in claim 1 to 8.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2017/038216 WO2019082246A1 (en) | 2017-10-23 | 2017-10-23 | Dc power supply device and air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110268620A true CN110268620A (en) | 2019-09-20 |
| CN110268620B CN110268620B (en) | 2021-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780085899.3A Expired - Fee Related CN110268620B (en) | 2017-10-23 | 2017-10-23 | DC power supply device and air conditioner |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP6594584B2 (en) |
| CN (1) | CN110268620B (en) |
| MY (1) | MY182088A (en) |
| WO (1) | WO2019082246A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7045530B2 (en) * | 2019-08-30 | 2022-03-31 | 三菱電機株式会社 | Power converter, motor drive and air conditioner |
| EP4024693A4 (en) * | 2019-08-30 | 2022-08-24 | Mitsubishi Electric Corporation | Power conversion device, motor drive device, and air conditioner |
| WO2021166186A1 (en) | 2020-02-20 | 2021-08-26 | 三菱電機株式会社 | Dc power supply device, refrigeration cycle device, air conditioner, and refrigerator |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006067653A (en) * | 2004-08-25 | 2006-03-09 | Shindengen Electric Mfg Co Ltd | Ac-dc converter |
| CN103313462A (en) * | 2012-03-12 | 2013-09-18 | 东芝照明技术株式会社 | Power supply for lighting and luminaire |
| JP2015061322A (en) * | 2013-09-17 | 2015-03-30 | 株式会社日本自動車部品総合研究所 | Power conversion device |
| JP2015139301A (en) * | 2014-01-23 | 2015-07-30 | サンケン電気株式会社 | Power factor improvement circuit |
| CN105393447A (en) * | 2013-05-30 | 2016-03-09 | 德克萨斯仪器股份有限公司 | Ac-dc converter having soft-switched totem-pole output |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5638585B2 (en) * | 2012-10-29 | 2014-12-10 | 三菱電機株式会社 | DC power supply device, refrigeration cycle device, air conditioner and refrigerator |
| JP5950970B2 (en) * | 2014-08-25 | 2016-07-13 | 三菱電機株式会社 | Power converter |
| JP6671126B2 (en) * | 2015-09-07 | 2020-03-25 | 日立ジョンソンコントロールズ空調株式会社 | DC power supply and air conditioner |
-
2017
- 2017-10-23 JP JP2019515558A patent/JP6594584B2/en active Active
- 2017-10-23 CN CN201780085899.3A patent/CN110268620B/en not_active Expired - Fee Related
- 2017-10-23 MY MYPI2019007646A patent/MY182088A/en unknown
- 2017-10-23 WO PCT/JP2017/038216 patent/WO2019082246A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006067653A (en) * | 2004-08-25 | 2006-03-09 | Shindengen Electric Mfg Co Ltd | Ac-dc converter |
| CN103313462A (en) * | 2012-03-12 | 2013-09-18 | 东芝照明技术株式会社 | Power supply for lighting and luminaire |
| CN105393447A (en) * | 2013-05-30 | 2016-03-09 | 德克萨斯仪器股份有限公司 | Ac-dc converter having soft-switched totem-pole output |
| JP2015061322A (en) * | 2013-09-17 | 2015-03-30 | 株式会社日本自動車部品総合研究所 | Power conversion device |
| JP2015139301A (en) * | 2014-01-23 | 2015-07-30 | サンケン電気株式会社 | Power factor improvement circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| JP6594584B2 (en) | 2019-10-23 |
| WO2019082246A1 (en) | 2019-05-02 |
| MY182088A (en) | 2021-01-18 |
| JPWO2019082246A1 (en) | 2019-11-14 |
| CN110268620B (en) | 2021-05-04 |
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