CN1592067A - Power supply device and air-conditioner using the same - Google Patents
Power supply device and air-conditioner using the same Download PDFInfo
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- CN1592067A CN1592067A CN 200410068293 CN200410068293A CN1592067A CN 1592067 A CN1592067 A CN 1592067A CN 200410068293 CN200410068293 CN 200410068293 CN 200410068293 A CN200410068293 A CN 200410068293A CN 1592067 A CN1592067 A CN 1592067A
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Abstract
To provide a power supply device capable of stable operations, without being affected by the fluctuations in the AC power supply voltage, and provide an air conditioner. The power supply device is provided with an AC power supply voltage detecting part (41) for detecting the voltage of the AC power supply (1); a zero-cross detection part (21), which detects the zero-cross point of the AC power supply voltage, on the basis of the detected voltage of the AC power supply and outputs a zero-cross detecting signal; a pulse signal control part (22) which generates and outputs a pulse signal for turning on/off switching elements (4a, 4b) of a power factor improving circuit (7), on the basis of the zero-cross detecting signal; and a switch driving part (23) which drives each switching element of the power factor improving circuit (7) by receiving the pulse signal. The zero-cross detecting part includes a timer (21a), which outputs the zero-cross detecting signal, after the elapse of a delay time (td) from the time when the AC power supply voltage reaches a prescribed voltage, and a correction part (21b) for correcting the delay time (td), based on the AC power supply voltage.
Description
Technical field
The present invention relates to a kind of supply unit, particularly a kind of supply unit that uses the direct voltage changeable of power factor correction circuit.In addition, the invention still further relates to the air conditioner that uses this supply unit.
Background technology
In the past, as ac-dc conversion circuit, alternating voltage is input to obtains pulse output in the diode rectifier circuit, thereby this condenser input type rectification circuit that makes its smoothing obtain direct voltage by electric capacity was used in every field.
Under situation about the condenser input type rectification circuit being used in supply unit, thereby because the narrow power factor that makes in the current lead-through angle of input current worsens, reactance capacity is more, therefore exists and can not effectively utilize this problem of power.In addition, contain a lot of radio-frequency components in the input current, produced problem the infringement that is connected the machine on the same power-supply system.Therefore, the someone has developed and has improved the supply unit (reference example such as patent documentation 1) that power factor reduces radio-frequency component.
The circuit structure of this supply unit as shown in Figure 8.Supply unit shown in Fig. 8 has the circuit structure that the alternating voltage Vin that AC power 101 is imported by rectification circuit 103 is transformed to pulse output voltage, in addition, also is inserted with reactor 102 in this circuit structure.By this reactor 102, the impact of input current Iin is relaxed, consequently, and can the extend current angle of flow, improve power factor, make to comprise the radio-frequency component minimizing among the input current Iin.
For example in air conditioner (air-conditioner), use under the situation of this supply unit, load 105 for compressor with motor and the converter that drives this motor.This supply unit, when AC power 101 is 100V, usually make relay circuit 130 carry out work with voltage doubling rectifing circuit for conducting state, simultaneously on low load area, by making relay circuit 130 be off-state, thereby carry out work with full-wave rectifying circuit, reduce output dc voltage.At this moment, can reduce loss on converter and the motor.
As mentioned above, the former supply unit shown in Fig. 8 only by the simple passive device of insert structure (reactor), just can improve power factor, can suppress the loss of load 105 simultaneously by the "on" position of transfer relay circuit 130.
In addition, other examples have the supply unit (referring to Patent Document 2) of the circuit structure shown in Fig. 9 in addition.Detailed action to this supply unit describes below.
Among Fig. 9, rectification circuit 133 and switching device 131 constitute power factor correction circuit.Control part 132 outputs synchronously, make the pulse signal of switching device 131 in given time conducting on the zero cross point of AC power 101.Like this, owing to pass through rectification circuit 133 and switching device 131 through reactor 102, flow through the electric current that makes AC power 101 short circuits, therefore, the input power supply begins to flow from the zero cross point of AC power 101.Like this, when switching device 131 become end after, electric current flows through reactor 102, rectification circuit 103 and capacitor 120a, 120b or smmothing capacitor 104.Consequently, can enlarge the current lead-through angle, significantly improve power factor.
Be used at this supply unit under the occasion of air conditioner, load 105 also for compressor with motor and the converter that drives this motor.On low load area,, can reduce the loss on converter and the motor equally by making relay circuit 130 for off-state becomes full-wave rectifying circuit.
As mentioned above, the former supply unit shown in Fig. 9 can significantly improve power factor by simple formation and control, can suppress the loss of load 105 simultaneously by the "on" position of transfer relay circuit 130.
＜patent documentation 〉
Patent documentation 1: the spy opens flat 9-182457 communique
Patent documentation 2: the spy opens flat 11-206130 communique
In the power circuit of the structure shown in Fig. 9, become given voltage when following at the input voltage value that detects AC power Vin, be judged as zero cross point, through after the given time, output makes the pulse signal of the switching device 131 of power factor correction circuit with conducting preset time from zero cross point.
Yet in this method, if the voltage Vin that AC power is imported change, the test point of zero crossing also can produce dislocation, thereby can not make switching device 131 with correct moment conducting, causes the inefficiency of power factor correction circuit.
In addition, the input voltage value of power factor correction circuit can reduce because of the change of supply voltage Vin or the increase of load.Therefore, the set point of the output voltage of power factor correction circuit is even in order also not to be affected under the situation that causes out-put supply to reduce in the change because of the change of supply voltage or load, be set to the value of maximum possible.The switching device of power factor correction circuit is that the pulse signal output time of conduction period is set to this maximum.Yet, if as the maximum of the pulse signal output time of switching device conduction period of power factor correction circuit be set to big after, will flow through overcurrent in the power factor correction circuit.Conversely, if for fear of overcurrent, and that the maximum of pulse signal output time (ON time) is set to is less, then when the input power supply of AC power reduces, the VD of power factor correction circuit can not fully be boosted, and causes efficient low of supply unit.
Summary of the invention
The present invention is in order to address the above problem, and purpose is to provide a kind of influence of the change that can not be subjected to AC supply voltage and the stable supply unit of exporting, and the air conditioner that uses this supply unit.
Relevant the 1st supply unit of the present invention, comprise the rectification circuit that voltage that AC power is imported carries out rectification, the reactor that is connected with rectification circuit, and the direct voltage of rectification circuit institute rectification boosted, make the input voltage waveform power factor correction circuit consistent of AC power with input current waveform.Power factor correction circuit, comprise by series connection a plurality of switching device constituted makes the current path conducting of the input current that flows into from above-mentioned AC power, the switch element that ends, and by the condenser network that a plurality of electric capacity constituted of connecting, and the electric charge that prevents to charge on above-mentioned electric capacity during for conducting state when switch element prevents rectifying device to the adverse current of switch element adverse current, and the diverter switch unit that the "on" position of current path is switched to conducting or off-state.Switch element is in parallel with condenser network, and contact between switching device and the contact between electric capacity are joined together, and the end points of switch element prevents that through adverse current rectifying device is connected with the end points of condenser network.The diverter switch unit, 1 of tie point of exchanging of an end and rectification circuit is connected, and the tie point between the switching device of the other end and power factor correction circuit is connected.
In addition, the 1st supply unit also comprises the AC supply voltage checkout gear of the voltage that detects AC power, and according to the voltage of detected AC power, detect the zero cross point of AC supply voltage and export the zero cross detection device of zero cross detection signal, and according to the zero cross detection signal, generate and export the pulse signal control device of the pulse signal of each switching device conduction and cut-off that makes power factor correction circuit, and the received pulse signal, the driving power factor improves the driving mechanism for switch of each switching device of circuit.The zero cross detection device, when AC supply voltage reaches given voltage, through the given timer unit of exporting the zero cross detection signal time of delay (td) afterwards, and according to the magnitude of voltage of the detected AC power of AC supply voltage checkout gear, the compensating unit of compensating delay time (td);
The 1st supply unit further can also comprise the DC checkout gear of the output voltage that detects supply unit.At this moment, the pulse signal control device can change the ON time (tw) of the switching device of device for improving power factor according to the variation of the detected magnitude of voltage of dc voltage checkout gear.In addition, the pulse signal control device can also be according to the maximum of the ON time (tw) of the value alternation switch device of AC supply voltage.
Relevant the 2nd supply unit of the present invention, comprise the rectification circuit that voltage that AC power is imported carries out rectification, the reactor that is connected with rectification circuit, and the direct voltage of rectification circuit institute rectification boosted, make the input voltage waveform power factor correction circuit consistent of above-mentioned AC power with input current waveform.Power factor correction circuit, comprise by series connection a plurality of switching device constituted makes the current path conducting of the input current that flows into from above-mentioned AC power, the switch element that ends, and by the condenser network that a plurality of electric capacity constituted of connecting, and the electric charge that prevents to charge on electric capacity during for conducting state when switch element prevents rectifying device to the adverse current of switch element adverse current, and the diverter switch unit that the "on" position of current path is switched to conducting or off-state.Switch element is in parallel with condenser network, and contact between switching device and the contact between electric capacity are joined together, and the end points of switch element prevents that through adverse current rectifying device is connected with the end points of condenser network.The diverter switch unit, 1 of tie point of exchanging of an end and rectification circuit is connected, and the tie point between the switching device of the other end and power factor correction circuit is connected.
In addition, the 2nd supply unit, the DC power supply voltage check device that also comprises the direct voltage that the detection rectification circuit is exported, and according to detected DC power supply voltage, detect the zero cross point of AC supply voltage and export the zero cross detection device of zero cross detection signal, and according to the zero cross detection signal, generate and export the pulse signal control device of the pulse signal of each switching device conduction and cut-off that makes power factor correction circuit, and the received pulse signal, the driving power factor improves the driving mechanism for switch of each switching device of circuit.The zero cross detection device, comprise when DC power supply voltage reaches given voltage, through the given timer unit of exporting the zero cross detection signal time of delay (td) afterwards, and according to the detected DC power supply voltage of DC power supply voltage check device, the compensating unit of compensating delay time (td);
The 2nd supply unit further can also comprise the DC checkout gear of the output voltage that detects supply unit.The pulse signal control device can change the ON time (tw) of the switching device of device for improving power factor according to the variation of the detected magnitude of voltage of dc voltage checkout gear.In addition, the pulse signal control device can also be according to the maximum of the ON time (tw) of the value alternation switch device of DC power supply voltage.
Relevant air conditioner of the present invention has above-mentioned supply unit.
The present invention, detect from exchanging the input voltage (AC supply voltage) of power supply or the output voltage (DC power supply voltage) of rectification circuit, by compensating zero cross detection td time of delay according to this detected value, even the change of the input voltage of AC power also can detect td time of delay very accurately.This formation is even because the change of the input voltage of AC power also can suppress the change of the output dc voltage of power factor correction circuit, therefore have the effect that improves power factor.
In addition, can also detect AC supply voltage or DC power supply voltage, according to the maximum of the ON time (tw) of the switching device of this voltage compensation power factor correction circuit.Like this, can suppress change from the caused output voltage of change of the input voltage of AC power.Therefore,, also can suppress the change of the output voltage of power factor correction circuit, improve the effect of power factor even have the variation in voltage of AC power.
In addition, by the present invention, also can keep high efficiency air conditioner even can realize the input voltage change of AC power.
Description of drawings
Fig. 1 is the circuit structure diagram of the supply unit of embodiments of the present invention 1.
Fig. 2 is the schematic diagram of the waveform of pulse signal in the supply unit of explanation execution mode 1 and major part.
Fig. 3 is the figure that is used for illustrating the sequential that zero cross point detects.
Fig. 4 is the circuit structure diagram of the supply unit of embodiments of the present invention 2.
Fig. 5 is the circuit structure diagram of the supply unit of embodiments of the present invention 3.
Fig. 6 is the circuit structure diagram of the supply unit of embodiments of the present invention 4.
Fig. 7 is the pie graph of the air conditioner (air-conditioner) that utilizes supply unit of the present invention.
Fig. 8 is the circuit structure diagram of an example of the supply unit before the explanation.
Fig. 9 is the circuit structure diagram of another example of the supply unit before the explanation.
Embodiment
The contrast accompanying drawing is elaborated to the execution mode of line related device of the present invention below.In addition, identical reference symbol is represented identical or equal inscape or part in the accompanying drawing.
(execution mode 1)
Fig. 1 is the circuit structure diagram of the supply unit of embodiments of the present invention 1.
Supply unit comprises rectification circuit 2, reactor 3, power factor correction circuit 7, smmothing capacitor 8 and diverter switch 12.
Power factor correction circuit 7 comprises that 2 switching device 4a and 4b, 2 capacitor 5a and 5b, 2 adverse currents prevent rectifying device 6a, 6b and diverter switch 12.Smmothing capacitor 8 makes the output voltage smoothing of power factor correction circuit 7.Be connected with load 9 in the supply unit.
In the power factor correction circuit 7, the mid point that is connected in series of 2 switching device 4a, 4b is connected with the mid point that is connected in series of 2 electric capacity 5a, 5b.Switching device 4a prevents that through adverse current rectifying device 6a is connected with electric capacity 5a.Switching device 4b prevents that through adverse current rectifying device 6b is connected with electric capacity 5b.
In addition, the inscape as the control system of supply unit comprises zero cross detection portion 21, pulse signal control part 22, switch drive portion 23, diverter switch drive division 24 and AC supply voltage test section 41.
AC supply voltage test section 41 detects the supply voltage Vin of AC power 1.
Zero cross detection portion 21 according to the signal from AC supply voltage test section 41, detects the zero cross point of AC power 1, output zero cross detection signal.Detection action about the zero cross point of zero cross detection portion 21 will be elaborated in the back.
Pulse signal control part 22 receives the zero cross detection signal from zero cross detection portion 21, generates and output is used for the pulse signal of driving switch device 4a, 4b.Pulse signal control part 22 can be made of logical circuit commonly used or microcomputer etc.The pulse signal that switch drive portion 23 receives from pulse signal control part 22 makes switching device 4a, 4b conduction and cut-off.Diverter switch drive division 24 drives diverter switch 12.
Shown supply voltage, input current and the pulse signal waveform separately in the supply unit of present embodiment among Fig. 2.Label among the figure " Vin " is the waveform of AC power 1, and " Iin " is the waveform of input current, and the direction with the arrow indication is a forward respectively." Pa " expression is used for the pulse signal of driving switch device 4a in addition, and " Pb " expression is used for the pulse signal of driving switch device 4b.In addition, " Va ", " Vb " represent the both end voltage of electric capacity 5a, 5b respectively, and the both end voltage of " Vdc " expression smmothing capacitor 8 also is the output voltage of supply unit.
Pulse signal control part 22, output on the zero cross point of the voltage Vin of the detected AC power 1 of zero cross detection portion 21 synchronously and make among switching device 4a, the 4b at least one become pulse signal at the state of certain hour (tw) conducting.In the example of Fig. 2, make switching device 4a in certain hour (tw) conducting down, in addition, make switching device 4b in certain hour (tw) conducting down at the negative half-cycle of AC power 1 at the positive half period of AC power 1.In addition, though show among the figure, diverter switch 12, for example with switching device 4a and 4b conduction period separately synchronously and conducting.
Among Fig. 2, when switching device 4a is conducting state, owing to equate with the both end voltage Vb of capacitor 5b from the voltage of AC power 1 load 9 sides, therefore from voltage Vin surpass voltage Vb the time, input current Iin begins to flow, and to increase up to pulse signal Pa be conducting state always.
Therefore, after pulse signal Pa becomes cut-off state, become with the both end voltage Vdc of smmothing capacitor 8 from the voltage of AC power 1 load 9 sides and to equate, at this moment, under the voltage Vin situation littler than voltage Vdc, if input current Iin reduces, the both end voltage Vdc that surpasses smmothing capacitor 8 from magnitude of voltage Vin flows for the electric current of capacitor 8 chargings at the moment once more.
Consequently, can accelerate the rising of input current Iin, thus can extend current conduction period.At negative half period too, when switching device 4b is conducting state, the both end voltage Va that surpasses capacitor 5a from magnitude of voltage Vin at the moment, input current Iin begins to flow, therefore can extend current conduction period.
Above-mentioned repeatedly action of half period by with the alternating voltage of AC power 1 can enlarge during the current lead-through, thereby can access sufficiently high power factor.
Below, the detailed action of zero cross detection portion 21 is described.
Zero cross detection portion 21, comprise when the voltage Vin of AC power 1 reaches setting voltage Vth, through the given timer 21a that exports the zero cross detection signal time of delay (td) afterwards, and compensation as the output of timer 21a time of delay td compensation section 21b time of delay.
The zero cross point of AC supply voltage Vin by the detected value of AC supply voltage test section 41 input ac power voltage Vin, detects in zero cross detection portion 21.Specifically, as shown in Figure 3, the timer 21a of AC power test section 21 compares AC supply voltage Vin and given voltage (zero crossing judgement voltage) Vth, detect the sequential t0 of input voltage vin when reaching given voltage Vth, make this sequential t0 postpone output zero cross detection signal on the resulting sequential tz of td time of delay.
Here, magnitude of voltage Vin is dropped to voltage V ' in and situation about changing is considered.In this case,, postponed after td time of delay, just detected the zero cross point that departs from true zero cross point because the sequential of changing voltage V ' in when reaching given voltage Vth is t0 '.Therefore, owing to do not carry out the conduction and cut-off action of switching device 4a, 4b on correct sequential, so power factor correction circuit 7 correctly do not carry out work, caused the deterioration of power factor.
In the present embodiment, in the zero cross detection portion 21, time of delay compensation section 21b, according to the value compensating delay time td of the detected AC supply voltage Vin of AC supply voltage test section 41, even make the input value of supply voltage Vin that change take place, also can detect true zero cross point.Also promptly, delay voltage compensation section 21b monitors the amplitude of supply voltage Vin, according to the change of this amplitude and compensating delay time td.For example, when amplitude (peak value) becomes than fiducial value hour, making time of delay td is bigger value t ' d.In particular, time of delay compensation section 21b, make t ' d time of delay after the compensation below satisfying relational expression and compensate.
t’d＝td+Δtd
Δ td=(detected value of (detected value of the fiducial value-AC supply voltage of AC supply voltage)/AC supply voltage) * A * td
Here, the penalty coefficient of A for setting.
Like this, supply unit according to present embodiment, because change corresponding to the voltage Vin of AC power 1, td time of delay that is used for the zero crossing judgement is compensated, therefore no matter how how AC supply voltage Vin changes, the zero cross point that detects AC supply voltage that can both be correct is realized the higher action of precision of power factor correction circuit 7.
(execution mode 2)
The circuit structure diagram that has shown the execution mode 2 of line related device of the present invention among Fig. 4.
The supply unit of present embodiment in the supply unit of execution mode 1, also has the DC test section 25 of the output voltage V dc that is used for detecting supply unit in addition.Detection is as the output voltage of the smmothing capacitor 8 of output voltage V dc, but also can the detection power factor improves the output voltage of circuit 7.In addition, pulse signal control part 22 comprises the peaked maximum ON time compensation section 22a according to the ON time (tw) of AC supply voltage Vin alternation switch device 4a, 4b.
Pulse signal control part 22, according to output voltage V dc, the ON time (tw) of alternation switch device 4a, 4b, thus obtain certain output voltage values.
Particularly, pulse signal control part 22 is by the detected value of AC supply voltage test section 41 input ac power voltage Vin.If AC supply voltage reduces, output voltage V dc also reduces simultaneously.Therefore, when the input voltage vin of AC power 1 was lowered, in order to suppress the change of its output voltage V dc that causes, it was the time tw of conducting that pulse signal control part 22 increases switching device 4a, 4b, is certain magnitude of voltage thereby make output voltage V dc.
Yet if make switching device 4a, 4b be conducting state for a long time, the electric current that flows in power factor correction circuit also can increase, and might destroy circuit, and therefore the maximum of ON time tw is set.The maximum of this ON time tw is set according to the rated value of the voltage of AC power 1.When the voltage Vin of AC power 1 reduces,, also can't obtain desired output voltage values even ON time tw increases to its maximum.
Therefore, in the present embodiment, the maximum ON time compensation section 22a of pulse signal control part 22, when AC supply voltage Vin reduces fiducial value (rated value of AC supply voltage Vin) when following, increase the maximum of ON time tw, the value when making it be rated value than AC supply voltage Vin is big.
In addition, if the input voltage vin of AC power 1 rises, because output voltage V dc also rises, pulse signal control part 22 reduces the ON time tw of switching device 4a, 4b, is certain value thereby make output voltage V dc.At this moment, maximum ON time compensation section 22a reduces the maximum of ON time tw, and the value when making it be rated value than AC supply voltage Vin is little.
As mentioned above, the supply unit of present embodiment because corresponding to the change of the voltage Vin of AC power 1, and changes the maximum of the ON time tw of switching device 4a, 4b, therefore no matter how how AC supply voltage Vin changes, and the value that can both keep output voltage V dc is for certain.
(execution mode 3)
The circuit structure diagram that has shown the execution mode 3 of line related device of the present invention among Fig. 5.
The supply unit of present embodiment in the supply unit of execution mode 1, has the DC power supply voltage detection department 51 of output voltage that is used for detecting rectification circuit 2 that replaces AC supply voltage test section 41.Zero cross detection portion 21 is according to the detected magnitude of voltage compensating delay time td of this direct voltage voltage detection department 51.Also be, the VD that timer 21a is exported rectification circuit 2 (DC power supply voltage) compares with given voltage (zero crossing judgement voltage) Vth, detect the sequential t0 of VD when reaching given voltage Vth, make this sequential t0 postpone output zero cross detection signal on the resulting sequential tz of td time of delay.Other function is the same with execution mode 1.
The VD of being exported owing to rectification circuit 2 (DC power supply voltage) changes corresponding to the change of the supply voltage Vin of AC power 1, so supply unit of present embodiment, also the same with execution mode 1, no matter how how AC supply voltage Vin changes, can both correctly detect the zero cross point of AC supply voltage, realize the higher action of precision of power factor correction circuit 7.
(execution mode 4)
The circuit structure diagram that has shown the execution mode 4 of line related device of the present invention among Fig. 6.
The supply unit of present embodiment in the supply unit of execution mode 3, also has the DC test section 25 of the output voltage V dc that is used for detecting supply unit in addition.In addition, pulse signal control part 22 comprises according to AC supply voltage Vin and the peaked maximum ON time compensation section 22a of the ON time (tw) of alternation switch device 4a, 4b.
Pulse signal control part 22, according to output voltage V dc, the ON time (tw) of alternation switch device 4a, 4b in order to obtain certain output voltage values.
Pulse signal control part 22 is by the detected value of DC power supply voltage detection department 51 inputs as the DC power supply voltage of the output of rectification circuit 2.Pulse signal control part 22, when DC power supply voltage reduced, for the change (reduction) that suppresses its output voltage V dc that causes, increasing switching device 4a, 4b was the time tw of conducting, is certain magnitude of voltage thereby make output voltage V dc.
The maximum ON time compensation section 22a of pulse signal control part 22 when DC power supply voltage reduces fiducial value when following, increases the maximum of ON time tw, and the value when making it be rated value than DC power supply voltage is big.
In addition, when DC power supply voltage rises to fiducial value when above, output voltage V dc also rises.Therefore, when DC power supply voltage rose, pulse signal control part 22 reduced the ON time tw of switching device 4a, 4b, was certain value thereby make output voltage V dc.At this moment, maximum ON time compensation section 22a reduces the maximum of ON time tw, and the value when making it be rated value than AC supply voltage Vin is little.
As mentioned above, the supply unit of present embodiment, owing to change corresponding to DC power supply voltage, and the maximum of the ON time tw of variation switching device 4a, 4b, therefore no matter how how AC supply voltage Vin changes, and the value that can both keep output voltage V dc is for certain.
(execution mode 5)
Configuration example to the air conditioner of the supply unit that utilizes above-mentioned execution mode describes below.
The configuration example that has shown the air conditioner that utilizes above-mentioned supply unit among Fig. 7.As shown in Figure 7, air conditioner comprises the supply unit 100 that the alternating voltage Vin of AC power 1 is transformed into given direct voltage Vdc, the converter 200 of the driving voltage of motor 210 is used and generated to the output of supply unit 100 as DC power supply, and the air by carrying out indoor and outdoor and the heat exchange between the cold-producing medium freeze cycle 300 of carrying out indoor air conditioning.
Simple formation and control by based on the supply unit of above-mentioned execution mode can access enough power factors, even the change of the magnitude of voltage of AC power also can keep the output voltage V dc of power factor correction circuit for certain.Therefore,, can realize not being subjected to the influence of change of the input voltage of AC power, the air conditioner of efficient and steady operation by the output of such supply unit is used as power supply.
Claims (5)
1. a supply unit is characterized in that, comprising:
A) voltage that AC power the is imported rectification circuit that carries out rectification;
B) reactor that is connected with above-mentioned rectification circuit;
C) direct voltage to this rectification circuit institute rectification boosts, and makes the input voltage waveform power factor correction circuit consistent with input current waveform of above-mentioned AC power,
Above-mentioned power factor correction circuit comprises: by series connection a plurality of switching device constituted, make the current path conducting of the input current that flows into from above-mentioned AC power or the switch element that ends; The condenser network that a plurality of electric capacity constituted by series connection; When above-mentioned switch element is conducting state, the electric charge that prevents to charge on above-mentioned electric capacity prevents rectifying device to the adverse current of above-mentioned switch element adverse current; And the "on" position of current path switched to the diverter switch unit of conducting or off-state,
Above-mentioned switch element is in parallel with condenser network, contact between contact between above-mentioned switching device and above-mentioned electric capacity is joined together, the end points of above-mentioned switch element prevents that through above-mentioned adverse current rectifying device is connected with the end points of above-mentioned condenser network, above-mentioned diverter switch unit, 1 of tie point of exchanging of one end and above-mentioned rectification circuit is connected, and the tie point between the switching device of the other end and above-mentioned power factor correction circuit is connected;
D) the AC supply voltage checkout gear of the voltage of detection AC power;
E) according to the voltage of above-mentioned detected AC power, detect the zero cross point of AC supply voltage and export the zero cross detection device of zero cross detection signal,
Above-mentioned zero cross detection device comprises: when AC supply voltage reaches given voltage, through the given timer unit of exporting the zero cross detection signal time of delay (td) afterwards; With magnitude of voltage, compensate the compensating unit of above-mentioned time of delay (td) according to the detected AC power of above-mentioned AC supply voltage checkout gear;
F), generate and export the pulse signal control device of the pulse signal of each switching device conduction and cut-off that makes above-mentioned power factor correction circuit according to above-mentioned zero cross detection signal;
G) receive above-mentioned pulse signal, drive the driving mechanism for switch of each switching device of above-mentioned power factor correction circuit.
2. supply unit as claimed in claim 1 is characterized in that:
Also comprise: detect the DC checkout gear of the output voltage of above-mentioned supply unit,
Above-mentioned pulse signal control device changes the ON time (tw) of the switching device of above-mentioned device for improving power factor according to the variation of the detected magnitude of voltage of above-mentioned dc voltage checkout gear; And above-mentioned pulse signal control device changes the maximum of the ON time (tw) of above-mentioned switching device according to the value of above-mentioned AC supply voltage.
3. a supply unit is characterized in that, comprising:
A) voltage that AC power the is imported rectification circuit that carries out rectification;
B) reactor that is connected with above-mentioned rectification circuit;
C) direct voltage to this rectification circuit institute rectification boosts, and makes the input voltage waveform power factor correction circuit consistent with input current waveform of above-mentioned AC power,
Above-mentioned power factor correction circuit comprises: by series connection a plurality of switching device constituted, make the current path conducting of the input current that flows into from above-mentioned AC power or the switch element that ends; The condenser network that a plurality of electric capacity constituted by series connection; When above-mentioned switch element is conducting state, the electric charge that prevents to charge on above-mentioned electric capacity prevents rectifying device to the adverse current of above-mentioned switch element adverse current; And the "on" position of current path switched to the diverter switch unit of conducting or off-state,
Above-mentioned switch element is in parallel with condenser network, contact between contact between above-mentioned switching device and above-mentioned electric capacity is joined together, the end points of above-mentioned switch element prevents that through above-mentioned adverse current rectifying device is connected with the end points of above-mentioned condenser network, above-mentioned diverter switch unit, 1 of tie point of exchanging of one end and above-mentioned rectification circuit is connected, and the tie point between the switching device of the other end and above-mentioned power factor correction circuit is connected;
D) detect the DC power supply voltage check device of the direct voltage that above-mentioned rectification circuit exports;
E) according to above-mentioned detected DC power supply voltage, detect the zero cross point of AC supply voltage and export the zero cross detection device of zero cross detection signal,
Above-mentioned zero cross detection device comprises: when AC supply voltage reaches given voltage, through the given timer unit of exporting the zero cross detection signal time of delay (td) afterwards; With magnitude of voltage, compensate the compensating unit of above-mentioned time of delay (td) according to the detected AC power of above-mentioned AC supply voltage checkout gear;
F), generate and export the pulse signal control device of the pulse signal of each switching device conduction and cut-off that makes above-mentioned power factor correction circuit according to above-mentioned zero cross detection signal;
G) receive above-mentioned pulse signal, drive the driving mechanism for switch of each switching device of above-mentioned power factor correction circuit.
4. supply unit as claimed in claim 3 is characterized in that:
Also comprise: detect the DC checkout gear of the output voltage of above-mentioned supply unit,
Above-mentioned pulse signal control device, change the ON time (tw) of the switching device of above-mentioned device for improving power factor according to the variation of the detected magnitude of voltage of above-mentioned dc voltage checkout gear, and, above-mentioned pulse signal control device changes the maximum of the ON time (tw) of above-mentioned switching device according to the value of above-mentioned DC power supply voltage.
5. air conditioner is characterized in that:
Has claim 1 any one described supply unit to the claim 4.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003303885 | 2003-08-28 | ||
| JP2003303885 | 2003-08-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1592067A true CN1592067A (en) | 2005-03-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410068293 Pending CN1592067A (en) | 2003-08-28 | 2004-08-27 | Power supply device and air-conditioner using the same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1592067A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100435461C (en) * | 2005-09-13 | 2008-11-19 | 尼克森微电子股份有限公司 | Automatic adapting voltage positioning high-speed pulsewidth modulation controller and method |
| CN1987258B (en) * | 2005-12-23 | 2010-08-25 | 乐金电子(天津)电器有限公司 | Variable frequency air conditioner and power factor compensating method for variable frequency air conditioner |
| CN101911461A (en) * | 2008-01-11 | 2010-12-08 | 日立空调·家用电器株式会社 | Power conversion device, power conversion device module, air conditioner, and freezing device |
| CN102148577A (en) * | 2010-02-09 | 2011-08-10 | 电力集成公司 | Integrated on-time extension for non-dissipative bleeding in a power supply |
| CN102362421A (en) * | 2009-03-26 | 2012-02-22 | 三电有限公司 | DC power supply device |
| CN102064701B (en) * | 2005-07-08 | 2012-11-14 | 电力集成公司 | Method and apparatus to limit maximum switch current in a switching power supply |
| CN101854115B (en) * | 2010-02-01 | 2013-03-06 | 艾默生网络能源有限公司 | Time retention circuit for preventing current from back pumping and power inverter |
| US8553439B2 (en) | 2010-02-09 | 2013-10-08 | Power Integrations, Inc. | Method and apparatus for determining zero-crossing of an AC input voltage to a power supply |
| CN106059275A (en) * | 2015-04-07 | 2016-10-26 | 意法半导体(图尔)公司 | Power converter with inrush current limitation |
| CN106059337A (en) * | 2015-04-07 | 2016-10-26 | 意法半导体(图尔)公司 | Ac-dc converter with limitation of inrush current |
| CN106339060A (en) * | 2016-08-30 | 2017-01-18 | 成都英格瑞德电气有限公司 | UPS (Uninterrupted Power Supply) system based on touch screen control |
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2004
- 2004-08-27 CN CN 200410068293 patent/CN1592067A/en active Pending
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102064701B (en) * | 2005-07-08 | 2012-11-14 | 电力集成公司 | Method and apparatus to limit maximum switch current in a switching power supply |
| CN100435461C (en) * | 2005-09-13 | 2008-11-19 | 尼克森微电子股份有限公司 | Automatic adapting voltage positioning high-speed pulsewidth modulation controller and method |
| CN1987258B (en) * | 2005-12-23 | 2010-08-25 | 乐金电子(天津)电器有限公司 | Variable frequency air conditioner and power factor compensating method for variable frequency air conditioner |
| CN101911461B (en) * | 2008-01-11 | 2013-06-19 | 日立空调·家用电器株式会社 | Power conversion device, power conversion device module, air conditioner, and freezing device |
| CN101911461A (en) * | 2008-01-11 | 2010-12-08 | 日立空调·家用电器株式会社 | Power conversion device, power conversion device module, air conditioner, and freezing device |
| CN102362421A (en) * | 2009-03-26 | 2012-02-22 | 三电有限公司 | DC power supply device |
| CN101854115B (en) * | 2010-02-01 | 2013-03-06 | 艾默生网络能源有限公司 | Time retention circuit for preventing current from back pumping and power inverter |
| US8531133B2 (en) | 2010-02-09 | 2013-09-10 | Power Integrations, Inc. | Integrated on-time extension for non-dissipative bleeding in a power supply |
| CN102148577A (en) * | 2010-02-09 | 2011-08-10 | 电力集成公司 | Integrated on-time extension for non-dissipative bleeding in a power supply |
| US8553439B2 (en) | 2010-02-09 | 2013-10-08 | Power Integrations, Inc. | Method and apparatus for determining zero-crossing of an AC input voltage to a power supply |
| CN102148577B (en) * | 2010-02-09 | 2013-10-30 | 电力集成公司 | Integrated on-time extension for non-dissipative bleeding in power supply |
| CN103595251A (en) * | 2010-02-09 | 2014-02-19 | 电力集成公司 | Integrated on-time extender for non-dissipative bleeding in a power supply |
| US8803449B2 (en) | 2010-02-09 | 2014-08-12 | Power Integrations, Inc. | Integrated on-time extension for non-dissipative bleeding in a power supply |
| US9263934B2 (en) | 2010-02-09 | 2016-02-16 | Power Integrations, Inc. | Method and apparatus for determining zero-crossing of an ac input voltage to a power supply |
| CN103595251B (en) * | 2010-02-09 | 2016-11-02 | 电力集成公司 | The extender integrated turn-on time that non-dissipativeness in power supply is released |
| CN106059275A (en) * | 2015-04-07 | 2016-10-26 | 意法半导体(图尔)公司 | Power converter with inrush current limitation |
| CN106059337A (en) * | 2015-04-07 | 2016-10-26 | 意法半导体(图尔)公司 | Ac-dc converter with limitation of inrush current |
| CN106339060A (en) * | 2016-08-30 | 2017-01-18 | 成都英格瑞德电气有限公司 | UPS (Uninterrupted Power Supply) system based on touch screen control |
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