CN108809122A - Rectification control method, air conditioner and computer readable storage medium - Google Patents

Rectification control method, air conditioner and computer readable storage medium Download PDF

Info

Publication number
CN108809122A
CN108809122A CN201810571551.1A CN201810571551A CN108809122A CN 108809122 A CN108809122 A CN 108809122A CN 201810571551 A CN201810571551 A CN 201810571551A CN 108809122 A CN108809122 A CN 108809122A
Authority
CN
China
Prior art keywords
switch unit
working condition
current
bridge circuit
rectification
Prior art date
Application number
CN201810571551.1A
Other languages
Chinese (zh)
Inventor
李曹磊
Original Assignee
广东美的制冷设备有限公司
美的集团股份有限公司
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
Application filed by 广东美的制冷设备有限公司, 美的集团股份有限公司 filed Critical 广东美的制冷设备有限公司
Priority to CN201810571551.1A priority Critical patent/CN108809122A/en
Publication of CN108809122A publication Critical patent/CN108809122A/en

Links

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M7/00Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/06Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
    • H02M7/066Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode particular circuits having a special characteristic
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M1/00Details of apparatus for conversion
    • H02M1/42Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
    • H02M1/4208Arrangements for improving power factor of AC input
    • H02M1/4225Arrangements for improving power factor of AC input using a non-isolated boost converter
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M1/00Details of apparatus for conversion
    • H02M1/42Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
    • H02M1/4208Arrangements for improving power factor of AC input
    • H02M1/4233Arrangements for improving power factor of AC input using a bridge converter consisting of active switches
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M7/00Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/12Conversion 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
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M1/00Details of apparatus for conversion
    • H02M2001/0048Circuits or arrangements for reducing losses

Abstract

The invention discloses a kind of rectification control methods, include the following steps:Obtain the current effective value of the sampling resistor;Mapping relations based on pre-set current value Yu the working condition of the pfc circuit determine and matched first working condition of the current effective value;Determine whether first working condition, second working condition current with the pfc circuit be consistent;When first working condition and second working condition are inconsistent, the working condition of the pfc circuit is switched to first working condition.The invention also discloses a kind of air conditioner and computer readable storage mediums.The present invention can reasonably realize the switching between diode rectification state and synchronous rectification state according to current effective value, and then the rectifier system for rationally switching according to the weight of load FPC circuits improves the efficiency of air conditioner to reduce the switching loss of FPC circuits.

Description

Rectification control method, air conditioner and computer readable storage medium

Technical field

The present invention relates to air-conditioning technical field more particularly to a kind of rectification control method, air conditioner and computer-readable deposit Storage media.

Background technology

With the development of power electronic technique, active PFC (Power Factor Correction, PFC) The advantages that technology is high, harmonic current is small, output voltage stabilization with power factor is widely used.At present, it is common to use Be BOOST types PFC, this PFC simple structure, convenient controls, but efficiency is more low.Therefore, at some to efficiency More demanding occasion, using no bridge totem pfc circuit, this circuit reduce the number of devices on circuit, improve effect Rate.

Currently, in the air conditioner equipped with pfc circuit, the rectifier system of outdoor unit includes synchronous rectification and diode Rectification.Wherein, the control process of each switch unit is complex when synchronous rectification, but the switching loss of synchronous rectification is less than two The switching loss of pole pipe rectification, in contrast, the corresponding rectifier circuit structure of diode rectification are simple, and the energy in low-load Enough reduce the switching loss of switch unit.

Although in existing air conditioner, pfc circuit can have the function of synchronous rectification and diode rectification simultaneously, But do not switched rationally between synchronous rectification and diode rectification, and air-conditioner switch loss is caused still to compare It is higher.

The above is only used to facilitate the understanding of the technical scheme, and is not represented and is recognized that the above is existing skill Art.

Invention content

The main purpose of the present invention is to provide a kind of rectification control method, air conditioner and computer readable storage medium, Aim to solve the problem that existing air conditioner switches unreasonable between synchronous rectification and diode rectification and causes switching loss higher Technical problem.

To achieve the above object, the present invention provides a kind of rectification control method, is applied to the air conditioner equipped with pfc circuit, The FPC circuits include sampling resistor, the sampling resistor be arranged AC power and the FPC circuits bridge circuit it Between;The working condition of the FPC circuits includes at least diode rectification state and synchronous rectification state, the rectification controlling party Method includes the following steps:

Obtain the current effective value of the sampling resistor;

Mapping relations based on pre-set current value Yu the working condition of the pfc circuit determine and the current effective value Matched first working condition;

Determine whether first working condition, second working condition current with the pfc circuit be consistent;

When first working condition and second working condition are inconsistent, by the working condition of the pfc circuit It is switched to first working condition.

Further, the mapping relations based on pre-set current value Yu the working condition of the pfc circuit, determining and institute The step of stating current effective value matched first working condition include:

Determine whether the current effective value is less than pre-set current value;

When the current effective value is less than pre-set current value, determine that first working condition is diode rectification shape State.

Further, after the step of whether determination current effective value is less than pre-set current value, the rectification Control method further includes:

When the current effective value is greater than or equal to pre-set current value, determine that first working condition is synchronous rectification State.

Further, the step of current effective value for obtaining the sampling resistor includes:

Real-time sampling operation is carried out to the sampling resistor, to obtain the instantaneous current value of the sampling resistor, and is based on The instantaneous current value determines the current effective value.

Further, the bridge circuit includes multiple switch unit, determination first working condition with it is described The whether consistent step of the second current working condition of pfc circuit includes:

Obtain the first switch state and the corresponding each switch unit of first working condition of each switch unit Second switch state;

Based on the first switch state and the second switch state, first working condition and described second is determined Whether working condition is consistent.

Further, the bridge circuit includes first switch unit, second switch unit, third switch unit and the 4th Switch unit, first working condition are synchronous rectification state;It is described to work in first working condition and described second When state is inconsistent, after the step of working condition of the pfc circuit is switched to first working condition, the rectification Control method further includes:

Determine that the input voltage of the bridge circuit currently whether there is positive and negative switching;

In the input voltage of the bridge circuit, there is currently when positive and negative switching, determine the bridge circuit after positive and negative switching Input voltage whether be in positive half period;

When input voltage is in positive half period after positive and negative switching, the first switch unit, second switch unit are controlled And the shutdown of third switch unit, and when the duration for be in input voltage positive half period reaches prefixed time interval, control 4th switching means conductive;

When the input current for monitoring presently described bridge circuit is more than zero, the first switch unit conducting is controlled;

When the input current for monitoring presently described bridge circuit is equal to zero, the first switch unit shutdown is controlled.

Further, after the positive and negative switching of the determination bridge circuit input voltage whether be in positive half period step After rapid, the rectification control method further includes:

When input voltage is in negative half-cycle after positive and negative switching, the first switch unit, second switch unit are controlled And the 4th switch unit shutdown, and when the duration for be in input voltage negative half-cycle reaches prefixed time interval, control The third switching means conductive;

When the input current for monitoring presently described bridge circuit is less than zero, the second switch unit conducting is controlled;

When the input current for monitoring presently described bridge circuit is equal to zero, the second switch unit shutdown is controlled.

Further, the FPC circuits further include bus capacitor and reactor;Wherein,

The first switch unit is connected in series to form the first branch with the second switch unit, and the third switch is single First to be connected in series to form the second branch with the 4th switch unit, the first branch is connected in parallel to form institute with the second branch State bridge circuit;

The tie point of the first switch unit and the second switch unit is via the reactor and the alternating current Source is electrically connected;The third switch unit is exchanged via the sampling resistor with described with the tie point of the 4th switch unit Power electric connection;

The first switch unit is electrically connected with the tie point of the third switch unit with the anode of the bus capacitor; The second switch unit is electrically connected with the tie point of the 4th switch unit with the cathode of the bus capacitor.

In addition, to achieve the above object, the present invention also provides a kind of air conditioner, the air conditioner includes:Memory, processing Device and it is stored in the whole stream control routine that can be run on the memory and on the processor, the whole stream control routine quilt The step of processor realizes rectification control method described in any one of the above embodiments when executing.

In addition, to achieve the above object, it is described computer-readable the present invention also provides a kind of computer readable storage medium It is stored with whole stream control routine on storage medium, is realized described in any of the above-described when the whole stream control routine is executed by processor Rectification control method the step of.

The present invention is then based on pre-set current value and PFC electricity by the current effective value of the acquisition sampling resistor The mapping relations of the working condition on road, determine with matched first working condition of the current effective value, then determine described the Whether one working condition, second working condition current with the pfc circuit be consistent, then in first working condition and institute State the second working condition it is inconsistent when, the working condition of the pfc circuit is switched to first working condition, being capable of basis Current effective value reasonably realizes the switching between diode rectification state and synchronous rectification state, and then according to the light of load The rectifier system for overlapping reason switching FPC circuits improves the efficiency of air conditioner to reduce the switching loss of FPC circuits.

Description of the drawings

Fig. 1 is the structural schematic diagram of air conditioner in the hardware running environment that the embodiment of the present invention is related to;

Fig. 2 is the flow diagram of one embodiment of rectification control method of the present invention;

Fig. 3 is the electrical block diagram of one embodiment of pfc circuit of the present invention;

Fig. 4 is the circuital current flow direction signal under diode rectification state, in the positive half period pfc circuit of alternating voltage Figure;

Fig. 5 is the drive of AC supply voltage Vs, circuital current Is and switch unit Q1~Q4 under diode rectification state The schematic diagram of the time change of moving pulse;

Fig. 6 is that the circuital current under synchronous rectification state, in the positive half period pfc circuit of alternating voltage flows to schematic diagram;

Fig. 7 is the driving of AC supply voltage Vs, circuital current Is and switch unit Q1~Q4 under synchronous rectification state The schematic diagram of the time change of pulse;

Fig. 8 is that the working condition of pfc circuit in one embodiment of rectification control method of the present invention switches schematic diagram.

The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.

Specific implementation mode

It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.

As shown in Figure 1, in the hardware running environment that Fig. 1, which is the embodiment of the present invention, to be related to air conditioner structural representation Figure.

As shown in Figure 1, the air conditioner may include:Processor 1001, such as CPU, network interface 1004, user interface 1003, memory 1005, communication bus 1002.Wherein, communication bus 1002 is for realizing the connection communication between these components. User interface 1003 may include display screen (Display), input unit such as keyboard (Keyboard), optional user interface 1003 can also include standard wireline interface and wireless interface.Network interface 1004 may include optionally that the wired of standard connects Mouth, wireless interface (such as WI-FI interfaces).Memory 1005 can be high-speed RAM memory, can also be stable memory (non-volatile memory), such as magnetic disk storage.Memory 1005 optionally can also be independently of aforementioned processor 1001 storage device.

Optionally, air conditioner can also include camera, RF (Radio Frequency, radio frequency) circuit, sensor, sound Frequency circuit, WiFi module etc..Wherein, sensor such as optical sensor, motion sensor and other sensors.Certainly, empty Device is adjusted to can also configure the other sensors such as gyroscope, barometer, hygrometer, thermometer, infrared sensor, it is no longer superfluous herein It states.

It will be understood by those skilled in the art that air conditioner structure shown in Fig. 1 does not constitute the restriction to air conditioner, it can To include either combining certain components or different components arrangement than illustrating more or fewer components.

As shown in Figure 1, as may include that operating system, network are logical in a kind of memory 1005 of computer storage media The changeover program of letter module, Subscriber Interface Module SIM and pfc circuit.

In air conditioner shown in Fig. 1, network interface 1004 be mainly used for connect background server, with background server into Row data communication;User interface 1003 is mainly used for connecting client (user terminal), with client into row data communication;And it handles Device 1001 can be used for calling the changeover program of the pfc circuit stored in memory 1005.

In the present embodiment, air conditioner includes:It memory 1005, processor 1001 and is stored on the memory 1005 And the whole stream control routine that can be run on the processor 1001, wherein processor 1001 calls to be stored in memory 1005 Whole stream control routine when, and execute following operation:

Obtain the current effective value of the sampling resistor;

Mapping relations based on pre-set current value Yu the working condition of the pfc circuit determine and the current effective value Matched first working condition;

Determine whether first working condition, second working condition current with the pfc circuit be consistent;

When first working condition and second working condition are inconsistent, by the working condition of the pfc circuit It is switched to first working condition.

Further, processor 1001 can call the whole stream control routine stored in memory 1005, also execute following Operation:

Determine whether the current effective value is less than pre-set current value;

When the current effective value is less than pre-set current value, determine that first working condition is diode rectification shape State.

Further, processor 1001 can call the whole stream control routine stored in memory 1005, also execute following Operation:

When the current effective value is greater than or equal to pre-set current value, determine that first working condition is synchronous rectification State.

Further, processor 1001 can call the whole stream control routine stored in memory 1005, also execute following Operation:

Real-time sampling operation is carried out to the sampling resistor, to obtain the instantaneous current value of the sampling resistor, and is based on The instantaneous current value determines the current effective value.

Further, processor 1001 can call the whole stream control routine stored in memory 1005, also execute following Operation:

Obtain the first switch state and the corresponding each switch unit of first working condition of each switch unit Second switch state;

Based on the first switch state and the second switch state, first working condition and described second is determined Whether working condition is consistent.

Further, processor 1001 can call the whole stream control routine stored in memory 1005, also execute following Operation:

Determine that the input voltage of the bridge circuit currently whether there is positive and negative switching;

In the input voltage of the bridge circuit, there is currently when positive and negative switching, determine the bridge circuit after positive and negative switching Input voltage whether be in positive half period;

When input voltage is in positive half period after positive and negative switching, the first switch unit, second switch unit are controlled And the shutdown of third switch unit, and when the duration for be in input voltage positive half period reaches prefixed time interval, control 4th switching means conductive;

When the input current for monitoring presently described bridge circuit is more than zero, the first switch unit conducting is controlled;

When the input current for monitoring presently described bridge circuit is equal to zero, the first switch unit shutdown is controlled.

Further, processor 1001 can call the whole stream control routine stored in memory 1005, also execute following Operation:

When input voltage is in negative half-cycle after positive and negative switching, the first switch unit, second switch unit are controlled And the 4th switch unit shutdown, and when the duration for be in input voltage negative half-cycle reaches prefixed time interval, control The third switching means conductive;

When the input current for monitoring presently described bridge circuit is less than zero, the second switch unit conducting is controlled;

When the input current for monitoring presently described bridge circuit is equal to zero, the second switch unit shutdown is controlled.

The present invention also provides a kind of rectification control methods, and with reference to Fig. 2 and Fig. 3, Fig. 2 is that rectification control method one of the present invention is real The flow diagram of example is applied, Fig. 3 is the electrical block diagram of one embodiment of pfc circuit of the present invention.

The rectification control method is applied to the air conditioner equipped with pfc circuit, and the FPC circuits include sampling resistor, described Sampling resistor is arranged between AC power and the bridge circuit of the FPC circuits;The working condition of the FPC circuits is at least wrapped Include diode rectification state and synchronous rectification state.

Specifically, with reference to Fig. 3, which includes:Bridge circuit, reactor L, bus capacitor C, sampling resistor R.

Wherein, bridge circuit is equipped with the multiple switch unit for being connected as bridge shape, the input terminal of the bridge circuit and friendship Galvanic electricity source is connected, and output end is connected with load (compressor of air conditioner).Reactor L is arranged in the bridge circuit and institute It states between AC power.The electric power that reactor L savings is supplied from AC power carries out reality as energy by discharging the energy The improvement of the boosting and power factor of existing totem pfc circuit.Output end after bus capacitor C is in parallel with load with bridge circuit Electrical connection.Sampling resistor R is arranged between the output end and AC power AC of bridge circuit, specifically, sampling resistor R settings On wiring between the output end and the output end of AC power AC of bridge circuit.

Switch unit includes first switch unit Q1, second switch unit Q2, the switch lists of third switch unit Q3 and the 4th First Q4.

First switch unit Q1 and second switch unit Q2 are connected in series to form the first branch, third switch unit Q3 and the Four switch unit Q4 are connected in series to form the second branch, and the first branch is connected in parallel to form the bridge circuit with the second branch 20。

First switch unit Q1 is electrically connected via reactor L with AC power AC with the tie point of second switch unit Q2; Third switch unit Q3 is electrically connected via the sampling resistor R with AC power AC with the tie point of the 4th switch unit Q4.The One switch unit Q1 is electrically connected with the tie point of third switch unit Q3 with the anode of bus capacitor C;Second switch unit Q2 with The tie point of 4th switch unit Q4 is electrically connected with the cathode of bus capacitor C.

Specifically, first switch unit Q1, second switch unit Q2, third switch unit Q3 and the 4th switch unit Q4 are equal Can be that MOSFET (partly lead by Metal-Oxide-Semiconductor Field-Effect TransIstor, metal oxide Body field-effect transistor), such as super node MOSFET or SiC-MOSFET.Preferably, the source electrode of first switch unit Q1 and The drain electrode of two switch unit Q2 is electrically connected, and tie point is electrically connected via reactor L with AC power;Third switch unit Q3's Source electrode is electrically connected with the drain electrode of the 4th switch unit Q4, and tie point is electrically connected with AC power;The leakage of first switch unit Q1 Pole is electrically connected with the drain electrode of third switch unit Q3, and tie point is electrically connected with the anode of bus capacitor C;Second switch unit Q2 Source electrode be electrically connected with the source electrode of the 4th switch unit Q4, tie point is electrically connected with the cathode of bus capacitor C.

There is body diode D1 in the inside of first switch unit Q1.Body diode D1 is in the source of first switch unit Q1 The part of existing pn-junction between pole and drain electrode.The saturation voltage of first switch unit Q1 is (between the drain-source under on-state Voltage) it is less than the positive voltage drop of body diode D1.Flowed through in the source drain of first switch unit Q1 as a result, electric current with Electric current is flowed through in body diode D1 to compare, voltage drop becomes smaller, or even can reduce conduction losses.It is easy-to-understand to and says, is connecing Flowed through in the first switch unit Q1 of logical state electric current in the body diode D1 in the first switch unit Q1 of off-state It flows through electric current to compare, conduction losses is made to become smaller.In addition, other switch unit Q2~Q4 could also say that it is same, I.e. the inside of second switch unit Q2 with body diode D2, third switch unit Q3 inside with body diode D3, the 4th The inside of switch unit Q4 has body diode D4.

In the present embodiment, which includes:

Step S110 obtains the current effective value of the sampling resistor;

Preferably, step S110 includes:Real-time sampling operation is carried out to the sampling resistor, to obtain the sampling electricity The instantaneous current value of resistance, and the current effective value is determined based on the instantaneous current value.

In the present embodiment, electricity can be calculated according to existing computation rule by the instantaneous current value of multiple sampling resistors Flow virtual value.

Step S120, the mapping relations based on pre-set current value Yu the working condition of the pfc circuit determine and the electricity Flow matched first working condition of virtual value;

In the present embodiment, the mapping relations that can pre-set pre-set current value and pfc circuit working condition are being got When current effective value, according to the mapping relations of the current effective value and pre-set current value and pfc circuit working condition obtain with Matched first working condition of the current effective value.

Step S130 determines whether first working condition, second working condition current with the pfc circuit be consistent;

It in the present embodiment, can be according to the switch shape of each switch unit in the corresponding bridge circuit of the first working condition The on off state of state and the current corresponding each switch unit of the second working condition of pfc circuit, i.e. current each switch are single Member on off state (or before current time in preset duration each switch unit on off state) determine the first work shape Whether state is consistent with the second working condition, specifically, each switch unit in the corresponding bridge circuit of the first working condition On off state, it is consistent with the current on off state of each switch unit when, determine the first working condition and the second working condition one It causes.

Step S140, when first working condition and second working condition are inconsistent, by the pfc circuit Working condition is switched to first working condition.

In the present embodiment, when the first working condition and the second working condition are inconsistent, by the working condition of pfc circuit It is switched to first working condition.For example, the first working condition be diode rectification state, the second working condition be synchronize it is whole The working condition of pfc circuit is then switched to diode rectification state by stream mode, alternatively, whole to synchronize in the first working condition Stream mode, the second working condition are diode rectification state, then the working condition of pfc circuit are switched to synchronous rectification state, And then it can reasonably be realized between diode rectification state and synchronous rectification state according to the current effective value of sampling resistor Switching can be reasonable according to the weight of load since the current effective value of the sampling resistor is related to the load of FPC circuits Switch the rectifier system of FPC circuits, and then reduce the switching loss of FPC circuits, improves the energy consumption of air conditioner.

It is the circuit under diode rectification state, in the positive half period pfc circuit of alternating voltage with reference to Fig. 4 and Fig. 5, Fig. 4 Current direction schematic diagram, Fig. 5 are AC supply voltage Vs, circuital current Is and switch unit Q1 under diode rectification state The schematic diagram of the time change of the driving pulse of~Q4.

In Fig. 4, according to AC power AC- reactor L- body diode D1- bus capacitors C (load)-body two in pfc circuit The sequential flow oversampling circuit electric current Is (input current of bridge circuit) of pole pipe D4- sampling resistor R- AC powers AC.Similarly, two pole Under pipe rectification state, the positive half period of alternating voltage, according to AC power AC- sampling resistor R- body diodes D3- in pfc circuit The sequential flow oversampling circuit electric current Is of bus capacitor C (load)-body diode D2- reactor L-- AC powers AC.In Fig. 5, PFC When in diode rectification state, switch unit Q1~Q4 does not have to action, is not necessarily to driving pulse.

When pfc circuit is in diode rectification state, the loss in pfc circuit essentially consists in the tube voltage drop of diode Vdrop, instantaneous current value I can be obtained by sampling resistorinst, then can be according to tube voltage drop due to flowing through 2 individual diodes when rectification Vdrop, instantaneous current value Iinst, the instant power loss P that is calculate by the following formula on diodediode

Pdiode=2VdropIinst

Therefore, in order to reduce the power attenuation of pfc circuit, tube voltage drop V is selected as possibledropSmall switch unit.

It is the circuit electricity under synchronous rectification state, in the positive half period pfc circuit of alternating voltage with reference to Fig. 6 and Fig. 7, Fig. 6 Stream flows to schematic diagram, and Fig. 7 is AC supply voltage Vs, circuital current Is and switch unit Q1~Q4 under synchronous rectification state Driving pulse time change schematic diagram, the curve in Fig. 7 is the wavy curve of current effective value, and straight line is predetermined current Value.

When pfc circuit is in synchronous rectification state, switch unit Q1~Q4 needs alternate conduction/disconnection, Fig. 6 and Fig. 7 In, in the positive half period of alternating voltage, carves control first switch unit Q1, the 4th switch unit Q4 conductings in due course, first Pfc circuit is effectively connected in switch unit Q1, the 4th switch unit Q4 high level times of coincidence section, is needed since power device switchs Will a period of time, and the folding of different device has certain otherness, therefore the 4th switch unit Q4 drive signals are than the One switch unit Q1 long a little can be realized with ensureing that effective turn-on time only controls first switch unit Q1.In alternating voltage Negative half-cycle, second switch unit Q2, the drive signal of third switch unit Q3 are similar.

In Fig. 6, according to AC power AC- reactor L- first switch unit Q1- bus capacitors C (load)-in pfc circuit The sequential flow oversampling circuit electric current Is (short circuit current) of 4th switch unit Q4- sampling resistor R- AC powers AC.Similarly, diode Under rectification state, the positive half period of alternating voltage, according to AC power AC- sampling resistor R- third switch units in pfc circuit The sequential flow oversampling circuit electric current Is of Q3- bus capacitors C (load)-second switch unit Q2- reactor L-- AC powers AC is (short Road electric current).

Due to, the loss of MOSFET is mainly switching loss and conduction loss, and switching frequency is very low in synchronous rectification, It can be ignored, the loss of pfc circuit is mainly conduction loss.Under normal circumstances, the conducting resistance R of switch unitONOnly 5 ~10m Ω can be calculate by the following formula the conduction loss P of pfc circuit

By formula it is found that when the loss of pfc circuit is less than diode rectification when synchronous rectification pfc circuit loss.

Switch schematic diagram with reference to the working condition that Fig. 8, Fig. 8 are pfc circuit in one embodiment of rectification control method of the present invention; In Fig. 8, when the working condition of pfc circuit is diode rectification state, current effective value is detected in real time, electric current has if detecting Valid value is greater than or equal to pre-set current value, then the working condition of the pfc circuit is switched to synchronous rectification state, if subsequent detection It is less than pre-set current value to current effective value, then the working condition of pfc circuit is switched to diode rectification state again.

The rectification control method that the present embodiment proposes then is based on by obtaining the current effective value of the sampling resistor The mapping relations of pre-set current value and the working condition of the pfc circuit determine and matched first work of the current effective value Make state, then determines whether first working condition, second working condition current with the pfc circuit be consistent, then exists When first working condition is inconsistent with second working condition, the working condition of the pfc circuit is switched to described First working condition can reasonably be realized according to current effective value between diode rectification state and synchronous rectification state Switch, and then rationally switch the rectifier system of FPC circuits according to the weight of load, to reduce the switching loss of FPC circuits, improves The efficiency of air conditioner.

Based on first embodiment, the second embodiment of rectification control method of the present invention, in the present embodiment, step are proposed S120 includes:

Step S121, determines whether the current effective value is less than pre-set current value;

Step S122 determines that first working condition is two poles when the current effective value is less than pre-set current value Pipe rectification state.

Further, in one embodiment, after step S121, further include:It is more than or waits in the current effective value When pre-set current value, determine that first working condition is synchronous rectification state.

In the present embodiment, with reference to Fig. 8, when getting current effective value, it is pre- to determine whether the current effective value is less than If current value, when the current effective value is less than pre-set current value, determine that first working condition is diode rectification state, When current effective value is greater than or equal to pre-set current value, determine that first working condition is synchronous rectification state, and then being capable of root First working condition is accurately determined according to current effective value, improves the accuracy of the working condition switching of FPC circuits.

Wherein, pre-set current value can be rationally arranged, for example, the pre-set current value can according to the operating mode of air conditioner into Row rationally setting.

Whether the rectification control method that the present embodiment proposes is less than pre-set current value by the determination current effective value, When the current effective value is less than pre-set current value, determine that first working condition is diode rectification state, Jin Erneng It is enough that first working condition is accurately determined according to current effective value, and then rationally switch the work of FPC circuits according to current effective value Make state, to realize the rectifier system for rationally switching FPC circuits according to the weight of load, reduces the switching loss of FPC circuits, into One step improves the efficiency of air conditioner.

Based on first embodiment, the second embodiment of rectification control method of the present invention, in the present embodiment, the electric bridge are proposed Circuit includes multiple switch unit, and step S130 includes:

Step S131, first switch state and first working condition for obtaining each switch unit are corresponding each The second switch state of a switch unit;

Step S132 is based on the first switch state and the second switch state, determines first working condition It is whether consistent with second working condition.

In the present embodiment, each switch unit in a cycle before first switch state can be current time On off state, second switch state are the on off state of each switch unit in the corresponding a cycle of the first working condition, When first switch state is with second switch state consistency, determine that first working condition is consistent with second working condition. Wherein, the period can be AC power alternating voltage a complete voltage period, including the positive half period of alternating voltage and Negative half-cycle, it is of course also possible to only include the positive half period or negative half-cycle of alternating voltage.

The rectification control method that the present embodiment proposes, by obtaining the first switch state of each switch unit, Yi Jisuo The second switch state of the corresponding each switch unit of the first working condition is stated, the first switch state and described is then based on Second switch state determines whether first working condition and second working condition are consistent, can be according to first switch State accurately determines whether the first working condition is consistent with the second working condition, improves FPC circuits with second switch state Working condition switching accuracy, further decrease the switching loss of FPC circuits, improve the efficiency of air conditioner.

Based on first embodiment, the 3rd embodiment of rectification control method of the present invention is proposed, in the present embodiment, electric bridge electricity Road includes first switch unit, second switch unit, third switch unit and the 4th switch unit, and the first working condition is to synchronize Rectification state, after step s 140, which further includes:

Step S150 determines that the input voltage of the bridge circuit currently whether there is positive and negative switching;

In the present embodiment, when the working condition of pfc circuit is switched to synchronous rectification state, which executes Synchronous rectification operates, specifically, the input voltage (i.e. AC supply voltage Vs) of bridge circuit can be obtained in real time, and judges that this is defeated Enter whether voltage has carried out positive and negative switching (whether having reached zero passage).

Step S160, in the input voltage of the bridge circuit, there is currently when positive and negative switching, determine institute after positive and negative switching Whether the input voltage for stating bridge circuit is in positive half period;

In the present embodiment, in input voltage, there is currently when positive and negative switching, determine the defeated of bridge circuit after positive and negative switching Enter whether voltage is in positive half period, that is, determine whether the input voltage of current bridge circuit is more than 0V, is more than in input voltage When 0V, the input voltage of bridge circuit is in positive half period after positive and negative switching, otherwise, the input electricity of bridge circuit after positive and negative switching Pressure is in negative half-cycle.

Step S170 when input voltage is in positive half period after positive and negative switching, controls the first switch unit, second Switch unit and the shutdown of third switch unit, and the duration for being in input voltage positive half period reaches prefixed time interval When, control the 4th switching means conductive;

Step S180 controls the first switch when the input current for monitoring presently described bridge circuit is more than zero Unit is connected;

Step S190 controls the first switch when the input current for monitoring presently described bridge circuit is equal to zero Unit turns off.

In the present embodiment, with reference to Fig. 7 and Fig. 8, when input voltage is in positive half period after positive and negative switching, control first Switch unit, second switch unit and the shutdown of third switch unit control the 4th switching means conductive, and monitoring electric bridge electricity in real time The input current on road, if monitoring, the input current of bridge circuit is more than zero, controls first switch conducting, and continues monitoring electricity The input current of bridge circuit;If monitoring again, the input current of bridge circuit is dropped equal to the input current of zero, i.e. bridge circuit It is as low as zero, then controls the shutdown of first switch unit, and then making first switch unit in section of the input current more than zero It is simultaneously turned on the 4th switch unit, and then realize the synchronous rectification of pfc circuit, to reduce the switch of each switch unit (conducting) is lost.

Wherein, prefixed time interval can be rationally arranged according to the operating mode of pfc circuit, which is less than At the time of the positive and negative switching of input voltage to input current be more than zero at the time of between time interval, certainly, the preset time Interval can be 0, i.e., while controlling the first switch unit, second switch unit and the shutdown of third switch unit, control Make the 4th switching means conductive.Between entering negative half-cycle to input voltage at the time of first switch unit turns off, it can control 4th switch unit turns off, for example, when first switch unit turns off, while controlling the shutdown of the 4th switch unit.

The rectification control method that the present embodiment proposes, currently whether there is by the input voltage of the determination bridge circuit Positive and negative switching, then in the input voltage of the bridge circuit, there is currently when positive and negative switching, determine the electricity after positive and negative switching Whether the input voltage of bridge circuit is in positive half period, when then input voltage is in positive half period after positive and negative switching, control The first switch unit, second switch unit and the shutdown of third switch unit, and it is in holding for positive half period in input voltage When continuous duration reaches prefixed time interval, the 4th switching means conductive is controlled, is monitoring presently described bridge circuit When input current is more than zero, the first switch unit conducting is controlled, then in the input for monitoring presently described bridge circuit When electric current is equal to zero, the first switch unit shutdown is controlled, can realize the same of pfc circuit in the positive half period of input voltage Rectification is walked, to reduce switch (conducting) loss of each switch unit.

Based on 3rd embodiment, the fourth embodiment of rectification control method of the present invention is proposed, in the present embodiment, in step After S160, which further includes:

Step S200 when input voltage is in negative half-cycle after positive and negative switching, controls the first switch unit, second Switch unit and the shutdown of the 4th switch unit, and the duration for being in input voltage negative half-cycle reaches prefixed time interval When, control the third switching means conductive;

Step S210 controls the second switch when the input current for monitoring presently described bridge circuit is less than zero Unit is connected;

Step S220 controls the second switch when the input current for monitoring presently described bridge circuit is equal to zero Unit turns off.

In the present embodiment, with reference to Fig. 7 and Fig. 8, when input voltage is in negative half-cycle after positive and negative switching, control first Switch unit, second switch unit and the shutdown of the 4th switch unit control third switching means conductive, and monitoring electric bridge electricity in real time The input current on road, if monitoring, the input current of bridge circuit is less than zero, controls second switch conducting, and continues monitoring electricity The input current of bridge circuit;If monitoring again, the input current of bridge circuit is equal to the input current liter of zero, i.e. bridge circuit Height then controls the shutdown of second switch unit, and then making second switch unit in the minus section of input current to zero It is simultaneously turned on third switch unit, and then realizes the synchronous rectification of pfc circuit, to reduce the switch of each switch unit (conducting) is lost.

It should be noted that between entering positive half period to input voltage at the time of second switch unit turns off, controllably Third switch unit shutdown processed, for example, when second switch unit turns off, while controlling the shutdown of third switch unit.

The rectification control method that the present embodiment proposes, by when input voltage is in negative half-cycle after positive and negative switching, controlling The first switch unit, second switch unit and the shutdown of the 4th switch unit are made, and negative half-cycle is in input voltage When duration reaches prefixed time interval, the third switching means conductive is controlled, is then monitoring presently described electric bridge When the input current of circuit is less than zero, the second switch unit conducting is controlled, is then monitoring presently described bridge circuit Input current when being equal to zero, control second switch unit shutdown, can realize PFC electricity in the negative half-cycle of input voltage The synchronous rectification on road, to reduce switch (conducting) loss of each switch unit.

In addition, the embodiment of the present invention also proposes a kind of computer readable storage medium, the computer readable storage medium On be stored with whole stream control routine, following operation is realized when the whole stream control routine is executed by processor:

Obtain the current effective value of the sampling resistor;

Mapping relations based on pre-set current value Yu the working condition of the pfc circuit determine and the current effective value Matched first working condition;

Determine whether first working condition, second working condition current with the pfc circuit be consistent;

When first working condition and second working condition are inconsistent, by the working condition of the pfc circuit It is switched to first working condition.

Further, following operation is also realized when the whole stream control routine is executed by processor:

Determine whether the current effective value is less than pre-set current value;

When the current effective value is less than pre-set current value, determine that first working condition is diode rectification shape State.

Further, following operation is also realized when the whole stream control routine is executed by processor:

When the current effective value is greater than or equal to pre-set current value, determine that first working condition is synchronous rectification State.

Further, following operation is also realized when the whole stream control routine is executed by processor:

Real-time sampling operation is carried out to the sampling resistor, to obtain the instantaneous current value of the sampling resistor, and is based on The instantaneous current value determines the current effective value.

Further, following operation is also realized when the whole stream control routine is executed by processor:

Obtain the first switch state and the corresponding each switch unit of first working condition of each switch unit Second switch state;

Based on the first switch state and the second switch state, first working condition and described second is determined Whether working condition is consistent.

Further, following operation is also realized when the whole stream control routine is executed by processor:

Determine that the input voltage of the bridge circuit currently whether there is positive and negative switching;

In the input voltage of the bridge circuit, there is currently when positive and negative switching, determine the bridge circuit after positive and negative switching Input voltage whether be in positive half period;

When input voltage is in positive half period after positive and negative switching, the first switch unit, second switch unit are controlled And the shutdown of third switch unit, and when the duration for be in input voltage positive half period reaches prefixed time interval, control 4th switching means conductive;

When the input current for monitoring presently described bridge circuit is more than zero, the first switch unit conducting is controlled;

When the input current for monitoring presently described bridge circuit is equal to zero, the first switch unit shutdown is controlled.

Further, following operation is also realized when the whole stream control routine is executed by processor:

When input voltage is in negative half-cycle after positive and negative switching, the first switch unit, second switch unit are controlled And the 4th switch unit shutdown, and when the duration for be in input voltage negative half-cycle reaches prefixed time interval, control The third switching means conductive;

When the input current for monitoring presently described bridge circuit is less than zero, the second switch unit conducting is controlled;

When the input current for monitoring presently described bridge circuit is equal to zero, the second switch unit shutdown is controlled.

It should be noted that herein, the terms "include", "comprise" or its any other variant are intended to non-row His property includes, so that process, method, article or system including a series of elements include not only those elements, and And further include other elements that are not explicitly listed, or further include for this process, method, article or system institute it is intrinsic Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including this There is also other identical elements in the process of element, method, article or system.

The embodiments of the present invention are for illustration only, can not represent the quality of embodiment.

Through the above description of the embodiments, those skilled in the art can be understood that above-described embodiment side Method can add the mode of required general hardware platform to realize by software, naturally it is also possible to by hardware, but in many cases The former is more preferably embodiment.Based on this understanding, technical scheme of the present invention substantially in other words does the prior art Going out the part of contribution can be expressed in the form of software products, which is stored in one as described above In storage medium (such as ROM/RAM, magnetic disc, CD), including some instructions use so that a station terminal equipment (can be mobile phone, Computer, server, air conditioner or network equipment etc.) execute method described in each embodiment of the present invention.

It these are only the preferred embodiment of the present invention, be not intended to limit the scope of the invention, it is every to utilize this hair Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills Art field, is included within the scope of the present invention.

Claims (10)

1. a kind of rectification control method, which is characterized in that be applied to the air conditioner equipped with pfc circuit, the FPC circuits include adopting Sample resistance, the sampling resistor are arranged between AC power and the bridge circuit of the FPC circuits;The work of the FPC circuits Make state and include at least diode rectification state and synchronous rectification state, the rectification control method includes the following steps:
Obtain the current effective value of the sampling resistor;
Mapping relations based on pre-set current value Yu the working condition of the pfc circuit, determination are matched with the current effective value The first working condition;
Determine whether first working condition, second working condition current with the pfc circuit be consistent;
When first working condition and second working condition are inconsistent, the working condition of the pfc circuit is switched For first working condition.
2. rectification control method as described in claim 1, which is characterized in that described based on pre-set current value and PFC electricity The mapping relations of the working condition on road, determine the first working condition matched with the current effective value the step of include:
Determine whether the current effective value is less than pre-set current value;
When the current effective value is less than pre-set current value, determine that first working condition is diode rectification state.
3. rectification control method as claimed in claim 2, which is characterized in that whether the determination current effective value is less than After the step of pre-set current value, the rectification control method further includes:
When the current effective value is greater than or equal to pre-set current value, determine that first working condition is synchronous rectification shape State.
4. rectification control method as described in claim 1, which is characterized in that obtain the current effective value of the sampling resistor Step includes:
Real-time sampling operation is carried out to the sampling resistor, to obtain the instantaneous current value of the sampling resistor, and based on described Instantaneous current value determines the current effective value.
5. rectification control method as described in claim 1, which is characterized in that the bridge circuit includes multiple switch unit, The whether consistent step of the second current working condition of determination first working condition and the pfc circuit includes:
Obtain each switch unit first switch state and the corresponding each switch unit of first working condition Two on off states;
Based on the first switch state and the second switch state, determine that first working condition works with described second Whether state is consistent.
6. the rectification control method as described in any one of claim 1 to 5, which is characterized in that the bridge circuit includes the One switch unit, second switch unit, third switch unit and the 4th switch unit, first working condition are synchronous rectification State;It is described first working condition and second working condition it is inconsistent when, by the working condition of the pfc circuit After the step of being switched to first working condition, the rectification control method further includes:
Determine that the input voltage of the bridge circuit currently whether there is positive and negative switching;
In the input voltage of the bridge circuit, there is currently when positive and negative switching, determine the defeated of the bridge circuit after positive and negative switching Enter whether voltage is in positive half period;
When input voltage is in positive half period after positive and negative switching, the first switch unit, second switch unit and are controlled Three switch units turn off, and when the duration for being in input voltage positive half period reaches prefixed time interval, described in control 4th switching means conductive;
When the input current for monitoring presently described bridge circuit is more than zero, the first switch unit conducting is controlled;
When the input current for monitoring presently described bridge circuit is equal to zero, the first switch unit shutdown is controlled.
7. rectification control method as claimed in claim 6, which is characterized in that the bridge circuit after the positive and negative switching of determination Input voltage whether be in positive half period the step of after, the rectification control method further includes:
When input voltage is in negative half-cycle after positive and negative switching, the first switch unit, second switch unit and are controlled Four switch units turn off, and when the duration for being in input voltage negative half-cycle reaches prefixed time interval, described in control Third switching means conductive;
When the input current for monitoring presently described bridge circuit is less than zero, the second switch unit conducting is controlled;
When the input current for monitoring presently described bridge circuit is equal to zero, the second switch unit shutdown is controlled.
8. rectification control method as claimed in claim 6, which is characterized in that the FPC circuits further include bus capacitor and Reactor;Wherein,
The first switch unit and the second switch unit are connected in series to form the first branch, the third switch unit with 4th switch unit is connected in series to form the second branch, and the first branch is connected in parallel to form the electricity with the second branch Bridge circuit;
The tie point of the first switch unit and the second switch unit is electric via the reactor and the AC power Connection;The tie point of the third switch unit and the 4th switch unit is via the sampling resistor and the AC power Electrical connection;
The first switch unit is electrically connected with the tie point of the third switch unit with the anode of the bus capacitor;It is described Second switch unit is electrically connected with the tie point of the 4th switch unit with the cathode of the bus capacitor.
9. a kind of air conditioner, which is characterized in that the air conditioner includes:It memory, processor and is stored on the memory And the whole stream control routine that can be run on the processor, it is realized such as when the whole stream control routine is executed by the processor The step of rectification control method described in any item of the claim 1 to 8.
10. a kind of computer readable storage medium, which is characterized in that be stored with rectification control on the computer readable storage medium Processing procedure sequence realizes that rectification described in any item of the claim 1 to 8 such as controls when the whole stream control routine is executed by processor The step of method.
CN201810571551.1A 2018-06-04 2018-06-04 Rectification control method, air conditioner and computer readable storage medium CN108809122A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810571551.1A CN108809122A (en) 2018-06-04 2018-06-04 Rectification control method, air conditioner and computer readable storage medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810571551.1A CN108809122A (en) 2018-06-04 2018-06-04 Rectification control method, air conditioner and computer readable storage medium

Publications (1)

Publication Number Publication Date
CN108809122A true CN108809122A (en) 2018-11-13

Family

ID=64088883

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810571551.1A CN108809122A (en) 2018-06-04 2018-06-04 Rectification control method, air conditioner and computer readable storage medium

Country Status (1)

Country Link
CN (1) CN108809122A (en)

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002252971A (en) * 2001-02-26 2002-09-06 Tdk Corp Switching power unit
JP2004032875A (en) * 2002-06-25 2004-01-29 Sony Corp Electronic equipment
CN101199105A (en) * 2005-07-08 2008-06-11 罗姆股份有限公司 Step-down type switching regulator, control circuit thereof, and electronic device using the same
CN104518656A (en) * 2013-10-08 2015-04-15 中兴通讯股份有限公司 Totem-pole bridgeless power factor correction soft switching control device and method
CN105006974A (en) * 2015-07-30 2015-10-28 广州金升阳科技有限公司 Synchronous rectification control method, control device and switch power supply
CN105281578A (en) * 2015-11-18 2016-01-27 广州金升阳科技有限公司 Synchronous rectifying control method and control device and switching power supply
CN105471289A (en) * 2015-12-28 2016-04-06 北京新能源汽车股份有限公司 Single-stage PFC (power factor correction) converter and electric vehicle charging apparatus equipped with same
CN205249052U (en) * 2015-11-18 2016-05-18 广州金升阳科技有限公司 Synchronous Rectifier controlling means and switching power supply
CN106505883A (en) * 2015-09-07 2017-03-15 江森自控日立空调技术(香港)有限公司 Continuous-current plant and air conditioner
CN106685206A (en) * 2016-08-31 2017-05-17 株式会社村田制作所 Power-factor correction device and control method thereof and electronic device
CN107546991A (en) * 2016-06-28 2018-01-05 日立江森自控空调有限公司 Power-converting device and the air conditioner for possessing power-converting device
CN107994789A (en) * 2017-11-24 2018-05-04 浙江大学 A kind of isolated form integrated form AC-DC converter based on non-bridge PFC and LLC resonance

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002252971A (en) * 2001-02-26 2002-09-06 Tdk Corp Switching power unit
JP2004032875A (en) * 2002-06-25 2004-01-29 Sony Corp Electronic equipment
CN101199105A (en) * 2005-07-08 2008-06-11 罗姆股份有限公司 Step-down type switching regulator, control circuit thereof, and electronic device using the same
CN104518656A (en) * 2013-10-08 2015-04-15 中兴通讯股份有限公司 Totem-pole bridgeless power factor correction soft switching control device and method
CN105006974A (en) * 2015-07-30 2015-10-28 广州金升阳科技有限公司 Synchronous rectification control method, control device and switch power supply
CN106505883A (en) * 2015-09-07 2017-03-15 江森自控日立空调技术(香港)有限公司 Continuous-current plant and air conditioner
CN105281578A (en) * 2015-11-18 2016-01-27 广州金升阳科技有限公司 Synchronous rectifying control method and control device and switching power supply
CN205249052U (en) * 2015-11-18 2016-05-18 广州金升阳科技有限公司 Synchronous Rectifier controlling means and switching power supply
CN105471289A (en) * 2015-12-28 2016-04-06 北京新能源汽车股份有限公司 Single-stage PFC (power factor correction) converter and electric vehicle charging apparatus equipped with same
CN107546991A (en) * 2016-06-28 2018-01-05 日立江森自控空调有限公司 Power-converting device and the air conditioner for possessing power-converting device
CN106685206A (en) * 2016-08-31 2017-05-17 株式会社村田制作所 Power-factor correction device and control method thereof and electronic device
CN107994789A (en) * 2017-11-24 2018-05-04 浙江大学 A kind of isolated form integrated form AC-DC converter based on non-bridge PFC and LLC resonance

Similar Documents

Publication Publication Date Title
CN104836446B (en) The control method of isolated converter, control circuit and Switching Power Supply
CN104242390B (en) A kind of charging method, charging circuit and mobile terminal
EP3139104A1 (en) Solar air conditioner and control method and control device thereof
CN103475076B (en) Portable electric appts wireless charging system and load detection method
CN203675387U (en) LED driving circuit employing controllable current source to provide TRIAC holding current
US20150144706A1 (en) Thermostat circuitry to control power usage
CN202840123U (en) Intelligent socket
KR101538498B1 (en) Method and appratus for battery gaging in portable terminal
CN103151019B (en) Control method and control device of display refresh rate of mobile terminal
CN101707828B (en) Constant-current source driving circuit with open circuit protection and adopting LED
CN103746434B (en) Charging method and system
CN102779499B (en) Display power-economizing method
CN102075098B (en) Capacitor energy discharging circuit capable of reducing power loss and power supply circuit thereof
CN202694047U (en) Multi-machine constant-pressure water supply control apparatus based on one-chip microcomputer control
CN102003767B (en) Control method and device for assistant electrical heating of air conditioner
CN101471604A (en) Converter power supply circuit and converter power supply driving method
CN104185001B (en) A kind of control method and device
CN103682491B (en) The charging method of electric room, charging circuit and electronic equipment
CN205405129U (en) Remote wakening system for vehicle control unit
CN104810909B (en) Control method for quickly charging and system
US20150123668A1 (en) Detection circuit and electronic terminal
CN103376869A (en) Temperature feedback control system and method for DVFS (Dynamic Voltage Frequency Scaling)
CN104577231A (en) Method, adaptor, terminal and system for realizing quick charging
CN103135731A (en) Method and device for intelligent power supply control for portable computer
CN101848580A (en) Led lamp control circuit and led lamp

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination