CN103337947A - Transverter capable of assigning input power, and operation method thereof - Google Patents
Transverter capable of assigning input power, and operation method thereof Download PDFInfo
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- CN103337947A CN103337947A CN2013101656653A CN201310165665A CN103337947A CN 103337947 A CN103337947 A CN 103337947A CN 2013101656653 A CN2013101656653 A CN 2013101656653A CN 201310165665 A CN201310165665 A CN 201310165665A CN 103337947 A CN103337947 A CN 103337947A
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Abstract
The invention provides a transverter capable of assigning an input power. The transverter includes a controller, an input unit, a modulation unit, and a phase changer. The controller generates a switching control signal, an inverting switching control signal, a first pulse width modulation control signal and a second pulse width modulation control signal. The input unit, according to the first pulse width modulation control signal, stores and transmits the input power of a DC power supply. The modulation unit, according to the second pulse width modulation control signal and a portion of the input power, generates and outputs a sine wave current of a full wave rectification. The phase changer, according to the switching control signal and the inverting switching control signal, converts the sine wave current into an alternating current and outputs the alternating current to a load or an electric supply.
Description
Technical field
The present invention relates to a kind of converter and method of operation thereof, relate in particular to that a kind of control method is simple, the power conversion number of times is few and converter and the method for operation thereof of conversion efficiency advantages of higher.
Background technology
At present generally speaking, converter can convert the input power of DC power supply to AC power, and output AC power is to load or civil power.If be coupled to the load of converter or voltage and the electric current same-phase of civil power, then the frequency of AC power is the twice of the frequency of the voltage of load or civil power and electric current, and AC power may the reverse influence DC power supply, and produces the low frequency ripple in DC power supply.If DC power supply is the renewable energy resources (as solar energy or wind power energies etc.), the DC power supply that then contains the low frequency ripple will reduce the usefulness of the maximum power output of the renewable energy resources.Therefore, how to design one and can reduce the AC power of load or civil power to the converter of DC power supply influence, become inverter design person's important topic.
Summary of the invention
In order to overcome the problems referred to above, the invention provides a kind of converter that distributes input power, can reduce the AC power of load or civil power to the influence of DC power supply.
The invention provides a kind of converter that distributes input power, it comprises controller, input unit, modulation unit and phase changer.Controller is in order to produce switch control signal, phase-veversal switch control signal, first pulse width modulation control signal and second pulse width modulation control signal; Input unit is in order to being coupled to DC power supply, and according to this first pulse width modulation control signal, stores and transmit the input power of this DC power supply; The modulation unit is coupled to this input unit, in order to according to this second pulse width modulation control signal, receives the part of this input power, and according to the part of this input power, produces the also string ripple electric current of output full-wave rectification; Phase changer is coupled to this modulation unit, in order to control signal according to this switch control signal and this phase-veversal switch, the string ripple electric current of changing this full-wave rectification becomes alternating current, and export this alternating current to load, wherein the frequency of the frequency of this switch control signal and this phase-veversal switch control signal and this load is identical; Wherein this controller is according to this string ripple electric current, controls the activation time of this second pulse width modulation control signal, and the activation time of this second pulse width modulation control signal of the activation time ratio of this first pulse width modulation control signal is long.
Preferable, in described converter, this DC power supply is solar panels or DC power supply.
Preferable, in described converter, this input unit has the function of maximum power tracing (maximum power point tracking).
Preferable, in described converter, this input unit comprises first switch, first coil, magnetizing inductance, second coil and first electric capacity.First switch has first end, second end and the 3rd end, this first switch, first end is coupled to first end of this DC power supply, this first switch, second end is in order to receive this first pulse width modulation control signal, and wherein this first switch is to open (ON) and cut out (OFF) according to this first pulse width modulation control signal; First coil has first end and second end, and this first coil, first end is coupled to the 3rd end of this first switch, and this first coil, second end is coupled to the first ground end; Magnetizing inductance has first end and second end, and this magnetizing inductance first end is coupled to the 3rd end of this first switch, and this magnetizing inductance second end is coupled to this first ground end; Second coil has first end and second end, and this second coil, second end is coupled to the second ground end, and wherein this second coil is in order to this first coil of magnetic coupling; First electric capacity has first end and second end, and this first electric capacity, first end is coupled to first end of this second coil, and this first electric capacity, second end is coupled to this modulation unit;
Perhaps, this input unit comprises first switch, magnetizing inductance and first electric capacity.First switch has first end, second end and the 3rd end, this first switch, first end is coupled to first end of this DC power supply, this first switch, second end is in order to receive this first pulse width modulation control signal, and wherein this first switch is to open and close according to this first pulse width modulation control signal; Magnetizing inductance has first end and second end, and this magnetizing inductance first end is coupled to the 3rd end of this first switch, and this magnetizing inductance second end is coupled to the first ground end; First electric capacity has first end and second end, and this first electric capacity, first end is coupled to the 3rd end of this first switch, and this first electric capacity, second end is coupled to this modulation unit.
Preferable, in described converter, this modulation unit comprises second switch, first diode, first inductance and second electric capacity.Second switch has first end, second end and the 3rd end, this second switch first end is coupled to second end of this first electric capacity, this second switch second end is in order to receive this second pulse width modulation control signal, and wherein this second switch is to open and close according to this second pulse width modulation control signal; First diode has first end and second end, and this first diode, first end is coupled to this second ground end, and this first diode, second end is coupled to the 3rd end of this second switch; First inductance has first end and second end, and this first inductance, first end is coupled to second end of this first diode; Second electric capacity has first end and second end, and this second electric capacity, first end is coupled to second end of this first inductance, and this second electric capacity, second end is coupled to this second ground end.
Preferable, in described converter, this phase changer comprises the 3rd switch, the 4th switch, the 5th switch, the 6th switch and second inductance.The 3rd switch has first end, second end and the 3rd end, and the 3rd switch first end is coupled to first end of this second electric capacity, and the 3rd switch second end is in order to receive this switch control signal; The 4th switch has first end, second end and the 3rd end, and the 4th switch first end is coupled to first end of this second electric capacity, and the 4th switch second end is in order to receive this phase-veversal switch control signal, and the 4th switch the 3rd end is coupled to second end of this load; The 5th switch has first end, second end and the 3rd end, and the 5th switch first end is coupled to the 3rd end of the 3rd switch, and the 5th switch second end is in order to receive this phase-veversal switch control signal, and the 5th switch the 3rd end is coupled to this second ground end; The 6th switch has first end, second end and the 3rd end, and the 6th switch first end is coupled to the 3rd end of the 4th switch, and the 6th switch second end is in order to receive this switch control signal, and the 6th switch the 3rd end is coupled to this second ground end; Second inductance has first end and second end, and this second inductance, first end is coupled to the 3rd end of the 3rd switch, and this second inductance, second end is coupled to first end of this load.
Preferable, in described converter, it comprises filter capacitor in addition.Filter capacitor has first end and second end, this filter capacitor first end is coupled to first end of this DC power supply, this filter capacitor second end is coupled to second end of this DC power supply, and wherein this filter capacitor is the high frequency ripple current on the direct voltage that provides in order to this DC power supply of filtering.
Preferable, in described converter, this input power is the product that equals the direct current that this direct voltage and this DC power supply provide, wherein this direct current is relevant with this maximum power tracing, and this controller is according to this direct current, controls the activation time of this first pulse width modulation control signal.
Preferable, in described converter, the power output of this load is the product that equals the voltage of this alternating current and this load.
Preferable, in described converter, when this first switch and the unlatching of this second switch, the part of this input power is stored to this magnetizing inductance, and the remainder of this input power is transferred into this phase changer (pattern I) with the stored power of this first electric capacity through this modulation unit; Or
When this second switch is closed and during this first switch open, this input power is stored to this magnetizing inductance, and the stored power of this first inductance is output to this phase changer (pattern II); Or
When this first switch and this second switch were all closed, the stored power of this magnetizing inductance saw through this first diode and is stored to this first electric capacity, and the stored power of this first inductance is output to this phase changer (pattern III).
The present invention also provides a kind of method of operation of converter, and this converter comprises input unit, modulation unit, controller and phase changer, and this method of operation comprises:
This controller produces first pulse width modulation control signal and second pulse width modulation control signal; And
This input unit is controlled signal according to this first pulse width modulation control signal and this modulation unit according to this second pulse width modulation, carries out corresponding action.
Preferable, in described method of operation, this input unit is controlled signal according to this first pulse width modulation control signal and this modulation unit according to this second pulse width modulation, carries out this corresponding action and comprises:
When this first pulse width modulation control signal and the activation of this second pulse width modulation control signal, the magnetizing inductance of this input unit stores the part of this input power, and the stored power of first electric capacity of the remainder of this input power and this input unit is transferred into this phase changer (pattern I) through this modulation unit; Or
This input unit is according to this first pulse width modulation control signal, and this modulation unit is carried out this corresponding action and comprised according to this second pulse width modulation control signal:
When this first pulse width modulation control signal activation is deenergized with this second pulse width modulation control signal, the magnetizing inductance of this input unit stores this input power, and the stored power of first inductance of this modulation unit is output to this phase changer (pattern II); Or
This input unit is according to this first pulse width modulation control signal, and this modulation unit is carried out this corresponding action and comprised according to this second pulse width modulation control signal:
When this first pulse width modulation control signal all deenergizes with this second pulse width modulation control signal, the parasitic capacitance that the stored power of the magnetizing inductance of this input unit sees through the second switch of first diode of this modulation unit and this modulation unit is stored to first electric capacity of this input unit, and the stored power of first inductance of this modulation unit is output to this phase changer (pattern III).
Preferable, in described method of operation, this DC power supply is solar panels or DC power supply.
Preferable, in described method of operation, this input unit has the function of maximum power tracing.
Preferable, in described method of operation, the activation time of this second pulse width modulation control signal of the activation time ratio of this first pulse width modulation control signal is long.
The invention provides a kind of converter and method of operation thereof of distributing input power.This converter and this method of operation are to utilize input unit to control signal according to first pulse width modulation control signal and modulation unit according to second pulse width modulation, carry out corresponding action.Therefore, compared to prior art, the present invention has following advantage:
The first, the present invention has the input unit that can carry out the input energy distribution, so the present invention can reduce AC power to the reverse influence of DC power supply, to increase the power transfer usefulness of this converter;
The second, when this converter running, because the direct voltage that this DC power supply provides sees through the Voltage Series of first coil and second coil and first electric capacity, so the direct current power that the turn ratio between this first coil and this second coil does not need higher position this DC power supply can be provided very much is passed to load, and the working range of this DC power supply can be very wide;
Three, because change the magnetizing inductance of this stream device and first inductance be operating in the continuous current conduction mode (continuous current mode, CCM), so the current stress on first switch and the second switch can be very not high;
Four, because when pattern III, the second switch of this converter still can see through the parasitic diode conducting, so when the second switch of this converter switches to pattern I from pattern III, the second switch of this converter has the characteristic of zero voltage switching, causes the second switch switch cost of this converter to reduce.
Description of drawings
Fig. 1 is a kind of schematic diagram that distributes the converter (isolated form) of input power of one embodiment of the invention explanation;
Fig. 2 illustrate for one embodiment of the invention first pulse width modulation control signal, the control of second pulse width modulation signal, the electric current of the magnetizing inductance of flowing through and first inductance of flowing through string ripple electric current concern schematic diagram;
Fig. 3 is the schematic diagram of one embodiment of the invention explanation converter at pattern I;
Fig. 4 is the schematic diagram of one embodiment of the invention explanation converter at pattern II;
Fig. 5 is the schematic diagram of one embodiment of the invention explanation converter at pattern III;
Fig. 6 is a kind of schematic diagram that distributes the converter (non-isolation type) of input power of another embodiment of the present invention explanation;
Fig. 7 is the schematic diagram of another embodiment of the present invention explanation converter at pattern I;
Fig. 8 is the schematic diagram of another embodiment of the present invention explanation converter at pattern II;
Fig. 9 is the schematic diagram of another embodiment of the present invention explanation converter at pattern III;
Figure 10 illustrates a kind of flow chart of method of operation of converter for another embodiment of the present invention.
[symbol description]
100,600 converters
102 controllers
104,604 input units
106 modulation unit
108 phase changers
110 DC power supply
112 loads
114 filter capacitors
1,042 first switches
1,044 first coils
1046 magnetizing inductances
1,048 second coils
1,050 first electric capacity
1062 second switches
1,064 first diodes
1,066 first inductance
1,068 second electric capacity
1082 the 3rd switches
1084 the 4th switches
1086 the 5th switches
1088 the 6th switches
1,090 second inductance
10622 parasitic diodes
FPWM first pulse width modulation control signal
The GND1 first ground end
The GND2 second ground end
The IDC direct current
The IAC alternating current
The IM electric current
IL string ripple electric current
SCS switch control signal
SPWM second pulse width modulation control signal
The VDC direct voltage
The VAC alternating voltage
The 1000-1010 step
Embodiment
For making purpose of the present invention, structure, feature and function thereof there are further understanding, cooperate embodiment to be described in detail as follows now.
Please refer to Fig. 1, Fig. 1 is a kind of schematic diagram that distributes the converter 100 (isolated form) of input power of one embodiment of the invention explanation.Converter 100 comprises controller 102, input unit 104, modulation unit 106 and phase changer 108.Controller 102 is in order to produce switch control signal SCS, phase-veversal switch control signal
First pulse width modulation control signal FPWM and second pulse width modulation control signal SPWM.Input unit 104 is in order to be coupled to DC power supply 110, and according to first pulse width modulation control signal FPWM, the input power PDC that stores and transmit DC power supply 110, wherein input power PDC equals direct current IDC that DC power supply 110 provides and the product of direct voltage VDC.In addition, DC power supply 110 is solar panels, and input unit 104 has maximum power tracing, and (wherein direct current IDC is relevant with the function of the maximum power tracing of input unit 104 for maximum power point tracking, function MPPT).But it is solar panels that the present invention is not limited to DC power supply 110, can also any DC power supply.Modulation unit 106 is to be coupled to input unit 104, in order to according to second pulse width modulation control signal SPWM, receives the part of input power PDC, and according to the part of input power PDC, produces the also string ripple electric current I L of output full-wave rectification.Phase changer 108 is to be coupled to modulation unit 106, in order to control signal according to switch control signal SCS and phase-veversal switch
The string ripple electric current I L of conversion full-wave rectification becomes alternating current IAC, and output AC electric current I AC is to load 112 (for example AC load), wherein switch control signal SCS and phase-veversal switch control signal
Frequency identical with the frequency of load 112.But the present invention is not limited to converter 100 output AC electric current I AC to AC load, can also output AC electric current I AC to civil power.As shown in Figure 1, input unit 104 not only can store input power PDC, also can be according to string wave power (that is the power output PAC of load 112 of modulation unit 106 required outputs, the power output PAC product of alternating voltage VAC of the alternating current IAC of load 112 and load 112 that equals to flow through wherein), transmit the part of input power PDC to modulation unit 106.But string wave power and the input power PDC of the 106 required outputs of modulation unit might not equate.Therefore, when the string wave power of modulation unit 106 required outputs and input power PDC are unequal, input unit 104 must store the first of input power PDC, and the second portion that transmits input power PDC is to modulation unit 106, and wherein the summation of the second portion of the first of input power PDC and input power PDC equals input power PDC.So, the low frequency ripple of the reverse generation of string wave power of modulation unit 106 required outputs will be absorbed by input unit 104, causes the low frequency ripple composition of input power PDC to reduce.
As shown in Figure 1, input unit 104 comprises first switch 1042, first coil 1044, magnetizing inductance 1046, second coil 1048 and first electric capacity 1050, and wherein the induction direction of second coil 1048 is identical with the induction direction of first coil 1044.First switch 1042 has first end, second end and the 3rd end, these first switch, 1,042 first ends are coupled to first end of DC power supply 110, these first switch, 1,042 second ends are in order to receive first pulse width modulation control signal FPWM, and wherein first switch 1042 is to open (ON) and cut out (OFF) according to first pulse width modulation control signal FPWM; First coil 1044 has first end and second end, and these first coil, 1,044 first ends are coupled to the 3rd end of first switch 1042, and these first coil, 1,044 second ends are coupled to the first ground end GND1; Magnetizing inductance 1046 has first end and second end, and magnetizing inductance 1,046 first ends are coupled to the 3rd end of first switch 1042, and magnetizing inductance 1,046 second ends are coupled to the first ground end GND1; Second coil 1048 has first end and second end, and second coil, 1,048 second ends are coupled to the second ground end GND2, and wherein second coil 1048 is in order to magnetic coupling first coil 1044; First electric capacity 1050 has first end and second end, and first electric capacity, 1,050 first ends are coupled to first end of second coil 1048, and first electric capacity, 1,050 second ends are coupled to modulation unit 106.
As shown in Figure 1, modulation unit 106 comprises second switch 1062, first diode 1064, first inductance 1066 and second electric capacity 1068, and wherein second switch 1062 has parasitic diode 10622.But in another embodiment of the present invention, parasitic diode 10622 also can be replaced by the entity diode.Second switch 1062 has first end, second end and the 3rd end, second switch 1,062 first ends are coupled to second end of first electric capacity 1050, second switch 1,062 second ends are in order to receive second pulse width modulation control signal SPWM, and wherein second switch 1062 is to open and close according to second pulse width modulation control signal SPWM; First diode 1064 has first end and second end, and first diode, 1,064 first ends are coupled to the second ground end GND2, and first diode, 1,064 second ends are coupled to the 3rd end of second switch 1062; First inductance 1066 has first end and second end, and first inductance, 1,066 first ends are coupled to second end of first diode 1064; Second electric capacity 1068 has first end and second end, and second electric capacity, 1,068 first ends are coupled to second end of first inductance 1066, and second electric capacity, 1,068 second ends are coupled to the second ground end GND2.
As shown in Figure 1, phase changer 108 comprises the 3rd switch 1082, the 4th switch 1084, the 5th switch 1086, the 6th switch 1088 and second inductance 1090.The 3rd switch 1082 has first end, second end and the 3rd end, and the 3rd switch 1,082 first ends are coupled to first end of second electric capacity 1068, and the 3rd switch 1,082 second ends are in order to receiving key control signal SCS; The 4th switch 1084 has first end, second end and the 3rd end, and the 4th switch 1,084 first ends are coupled to first end of second electric capacity 1068, and the 4th switch 1,084 second ends are in order to receive phase-veversal switch control signal
The 4th switch 1084 the 3rd end is coupled to second end of load 112; The 5th switch 1086 has first end, second end and the 3rd end, and the 5th switch 1,086 first ends are coupled to the 3rd end of the 3rd switch 1082, and the 5th switch 1,086 second ends are in order to receive phase-veversal switch control signal
The 5th switch 1086 the 3rd end is coupled to the second ground end GND2; The 6th switch 1090 has first end, second end and the 3rd end, the 6th switch 1,090 first ends are coupled to the 3rd end of the 4th switch 1084, the 6th switch 1,090 second ends are in order to receiving key control signal SCS, and the 6th switch 1090 the 3rd end is coupled to the second ground end GND2; Second inductance 1090 has first end and second end, second inductance, 1,090 first ends are coupled to the 3rd end of the 3rd switch 1082, second inductance, 1,090 second ends are coupled to first end of load 112, and wherein second inductance 1090 is the radio-frequency components in order to the string ripple electric current I L on filtering first inductance 1066.
In addition, as shown in Figure 1, converter 100 comprises filter capacitor 114 in addition.Filter capacitor 114 has first end and second end, filter capacitor 114 first ends are coupled to first end of DC power supply 110, filter capacitor 114 second ends are coupled to second end of DC power supply 110, wherein filter capacitor 114 is to flow through high-frequency current on first switch 1042 in order to filtering, and the direct voltage VDC that provides of stable dc power supply 110.
As shown in Figure 1, controller 102 is according to direct current IDC and maximum power tracing algorithm, control the activation time of first pulse width modulation control signal FPWM, according to string ripple electric current I L (PAC is relevant with power output), control the activation time of second pulse width modulation control signal SPWM, and according to the frequency of alternating voltage VAC, produce switch control signal SCS and phase-veversal switch control signal
Wherein the activation time of first pulse width modulation control signal FPWM is long than the activation time of second pulse width modulation control signal SPWM.Therefore, in the switching cycle of above-mentioned pulse width modulation control signal (first pulse width modulation control signal FPWM and second pulse width modulation control signal SPWM), converter 100 sees through first pulse width modulation control signal FPWM and but second pulse width modulation is controlled signal SPWM distribution portion input power PDC to magnetizing inductance 1046 and first electric capacity 1050 of input unit 104, and remainder is sent to modulation unit 106.In addition, when power output PAC is big, converter 100 sees through first pulse width modulation control signal FPWM and second pulse width modulation control signal SPWM not only directly is sent to modulation unit 106 with the part of input power PDC, also the magnetizing inductance 1046 in the input unit 104 and first electric capacity, 1050 stored power is sent to modulation unit 106.
Please refer to Fig. 2 to Fig. 5, Fig. 2 is the schematic diagram that concerns of the string ripple electric current I L of explanation first pulse width modulation control signal FPWM, second pulse width modulation control signal SPWM, the electric current I M of the magnetizing inductance 1046 of flowing through and first inductance 1066 of flowing through, Fig. 3 is the schematic diagram of explanation converter 100 at pattern I, Fig. 4 is the schematic diagram of explanation converter 100 at pattern II, and Fig. 5 is the schematic diagram of explanation converter 100 at pattern III.
As shown in Figures 2 and 3, in pattern I, because controller 102 activations first pulse width modulation control signal FPWM and second pulse width modulation control signal SPWM, so first switch 1042 and second switch 1062 are opened.Therefore, the part power of direct current IDC offers the magnetizing inductance 1046 of input unit 104, all the other power of direct current IDC and first electric capacity, 1050 stored power then offer first inductance 1066 of modulation unit 106, and are sent to phase changer 108 through first inductance 1066 of modulation unit 106.Because first switch 1042 and second switch 1062 are opened, so the string ripple electric current I L of the electric current I M of the magnetizing inductance 1046 of flowing through and first inductance 1066 of flowing through increases.In addition, in pattern I, controller 102 can be according to direct current IDC and maximum power tracing algorithm, determine the opening time (that is activation time of first pulse width modulation control signal FPWM) of first switch 1042, and controller 102 can be controlled unlatching (ON) time of second switch 1062 according to string ripple electric current I L.
As Fig. 2 and shown in Figure 4, in pattern II, when satisfying the power output PAC of load 112, controller 102 activations first pulse width modulation control signal FPWM and second pulse width modulation control signal SPWM that deenergizes cause first switch 1042 to be opened and second switch 1062 is closed.Therefore, open and second switch 1062 when closing when first switch 1042, alternating current IAC continues by first diode 1064 and 1066 generations of first inductance, so first inductance, 1066 stored power can be output to phase changer 108.But direct current IDC does not reach the direct current of DC power supply 110 under maximum power point as yet, so first switch 1042 continues to open, DC power supply 110 continues magnetizing inductance 1046 chargings, and cause flowing through the electric current I M continuation increase of magnetizing inductance 1046 and the string ripple electric current I L of first inductance 1066 of flowing through reduce.
As Fig. 2 and shown in Figure 5, in pattern III, when direct current IDC reaches the direct current of DC power supply 110 under maximum power point, controller 102 deenergizes, and first pulse width modulation is controlled signal FPWM and second pulse width modulation is controlled signal SPWM, so first switch 1042 and second switch 1062 are closed.Because first switch 1042 and second switch 1062 are closed, so magnetizing inductance 1046 stored power are recycled to first electric capacity 1050 by first coil 1044, second coil 1048, first diode 1064 and parasitic diode 10622.In addition, alternating current IAC continues to be produced by first diode 1064 and first inductance 1066, so first inductance, 1066 stored power can be output to phase changer 108.Because first switch 1042 and second switch 1062 are closed, so the string ripple electric current I L of the electric current I M of the magnetizing inductance 1046 of flowing through and first inductance 1066 of flowing through reduces.
Please refer to Fig. 6, Fig. 6 is a kind of schematic diagram that distributes the converter 600 (non-isolation type) of input power of another embodiment of the present invention explanation.As shown in Figure 6, the difference of converter 600 and converter 100 is that the input unit 604 of converter 600 has lacked first coil 1044 and second coil 1048.In addition, the operating principle of converter 600 is all identical with converter 100, does not repeat them here.Please refer to Fig. 7 to Fig. 9, Fig. 7 is the schematic diagram of explanation converter 600 at pattern I, and Fig. 8 is the schematic diagram of explanation converter 600 at pattern II, and Fig. 9 is the schematic diagram of explanation converter 600 at pattern III.
As Fig. 2 and shown in Figure 7, in pattern I, because controller 102 activations first pulse width modulation control signal FPWM and second pulse width modulation control signal SPWM, so first switch 1042 and second switch 1062 are opened.Therefore, the part power of direct current IDC offers the magnetizing inductance 1046 of input unit 604, all the other power of direct current IDC and first electric capacity, 1050 stored power then offer first inductance 1066 of modulation unit 106, and are sent to phase changer 108 through first inductance 1066 of modulation unit 106.
As Fig. 2 and shown in Figure 8, in pattern II, when satisfying the power output PAC of load 112, controller 102 activations first pulse width modulation control signal FPWM and second pulse width modulation control signal SPWM that deenergizes cause first switch 1042 to be opened and second switch 1062 is closed.Therefore, open and second switch 1062 when closing when first switch 1042, alternating current IAC continues by first diode 1064 and 1066 generations of first inductance, so first inductance, 1066 stored power can be output to phase changer 108.
As Fig. 2 and shown in Figure 9, in pattern III, when direct current IDC reaches the direct current of DC power supply 110 under maximum power point, controller 102 deenergizes, and first pulse width modulation is controlled signal FPWM and second pulse width modulation is controlled signal SPWM, so first switch 1042 and second switch 1062 are closed.Because first switch 1042 and second switch 1062 are closed, so magnetizing inductance 1046 stored power are recycled to first electric capacity 1050 by first coil 1044, second coil 1048, first diode 1064 and parasitic diode 10622.In addition, alternating current IAC continues to be produced by first diode 1064 and first inductance 1066, so first inductance, 1066 stored power can be output to phase changer 108.
Please refer to Fig. 1 to Figure 10, Figure 10 illustrates a kind of flow chart of method of operation of converter for another embodiment of the present invention.The method of Figure 10 is to utilize converter 600 explanations of converter 100 and Fig. 6 of Fig. 1, and detailed step is as follows:
Step 1000: beginning;
Step 1002: controller 102 produces first pulse width modulation control signal FPWM, second pulse width modulation control signal SPWM, switch control signal SCS and phase-veversal switch control signal
Step 1004: when first pulse width modulation control signal FPWM and second pulse width modulation control signal SPWM activation, carry out step 1006; When first pulse width modulation control signal FPWM activation and second pulse width modulation control signal SPWM deenergize, carry out step 1008; When first pulse width modulation control signal FPWM and second pulse width modulation control signal SPWM all deenergize, carry out step 1010;
Step 1006: the magnetizing inductance 1046 of input unit 104 stores the part of the input power PDC of DC power supply 110, and first electric capacity, the 1050 stored power of the remainder of input power PDC and input unit 104 are transferred into phase changer 108, rebound step 1004 through modulation unit 106;
Step 1008: the magnetizing inductance 1046 of input unit 104 stores input power PDC, and first inductance, the 1066 stored power of modulation unit 106 are output to phase changer 108 rebound step 1004;
Step 1010: the parasitic capacitance 10622 that the stored power of the magnetizing inductance 1046 of input unit 104 see through the second switch 1062 of first diode 1064 of modulation unit 106 and modulation unit 106 is stored to first electric capacity 1050 of input unit 104, and first inductance, the 1066 stored power of modulation unit 106 are output to phase changer 108 rebound step 1004.
In step 1002, as Fig. 1 and shown in Figure 6, controller 102 is according to direct current IDC and maximum power tracing algorithm, control the activation time of first pulse width modulation control signal FPWM, according to string ripple electric current I L (PAC is relevant with power output), control the activation time of second pulse width modulation control signal SPWM, and according to the frequency of alternating voltage VAC, produce switch control signal SCS and phase-veversal switch control signal
Wherein the activation time of first pulse width modulation control signal FPWM is long than the activation time of second pulse width modulation control signal SPWM.
In step 1006, as Fig. 2, Fig. 3 and shown in Figure 7, in pattern I, because controller 102 activations first pulse width modulation control signal FPWM and second pulse width modulation control signal SPWM, so first switch 1042 and second switch 1062 are opened.Therefore, the part power of direct current IDC offers the magnetizing inductance 1046 of input unit 104, all the other power of direct current IDC and first electric capacity, 1050 stored power then offer first inductance 1066 of modulation unit 106, and are sent to phase changer 108 through first inductance 1066 of modulation unit 106.Because first switch 1042 and second switch 1062 are opened, so the string ripple electric current I L of the electric current I M of the magnetizing inductance 1046 of flowing through and first inductance 1066 of flowing through increases.In addition, in pattern I, controller 102 can be according to direct current IDC and maximum power tracing algorithm, determine the opening time (that is activation time of first pulse width modulation control signal FPWM) of first switch 1042, and controller 102 can be controlled the opening time of second switch 1062 according to string ripple electric current I L.
In step 1008, as Fig. 2, Fig. 4 and shown in Figure 8, in pattern II, when satisfying the power output PAC of load 112, controller 102 activations first pulse width modulation control signal FPWM and second pulse width modulation control signal SPWM that deenergizes cause first switch 1042 to be opened and second switch 1062 is closed.Therefore, open and second switch 1062 when closing when first switch 1042, alternating current IAC continues by first diode 1064 and 1066 generations of first inductance, so first inductance, 1066 stored power can be output to phase changer 108.But direct current IDC does not reach the direct current of DC power supply 110 under maximum power point as yet, so first switch 1042 continues to open, DC power supply 110 continues magnetizing inductance 1046 chargings, and cause flowing through the electric current I M continuation increase of magnetizing inductance 1046 and the string ripple electric current I L of first inductance 1066 of flowing through reduce.
In step 1010, as Fig. 2, Fig. 5 and shown in Figure 9, in pattern III, when direct current IDC reaches the direct current of DC power supply 110 under maximum power point, controller 102 deenergizes, and first pulse width modulation is controlled signal FPWM and second pulse width modulation is controlled signal SPWM, so first switch 1042 and second switch 1062 are closed.Because first switch 1042 and second switch 1062 are closed, so magnetizing inductance 1046 stored power are recycled to first electric capacity 1050 by first coil 1044, second coil 1048, first diode 1064 and parasitic diode 10622.In addition, alternating current IAC continues to be produced by first diode 1064 and first inductance 1066, so first inductance, 1066 stored power can be output to phase changer 108.Because first switch 1042 and second switch 1062 are closed, so the string ripple electric current I L of the electric current I M of the magnetizing inductance 1046 of flowing through and first inductance 1066 of flowing through reduces.
In sum, the converter that distributes input power provided by the present invention and method of operation thereof be utilize input unit according to first pulse width modulation control signal and modulation unit according to second pulse width modulation control signal, carry out corresponding action.Therefore, compared to prior art, the present invention has following advantage: the first, the present invention has the input unit that can carry out the input energy distribution, so the present invention can reduce AC power to the reverse influence of DC power supply, to increase the power transfer usefulness of converter; The second, when converter operates, because the direct voltage that DC power supply provides sees through the Voltage Series of first coil and second coil and first electric capacity, so the direct current power that the turn ratio between first coil and second coil does not need higher position DC power supply can be provided very much is passed to load, and the working range of DC power supply can be very wide; Three, because the magnetizing inductance of converter and first inductance be operating in the continuous current conduction mode (continuous current mode, CCM), so the current stress on first switch and the second switch can be very not high; Four, because when pattern III, the second switch of converter still can see through parasitic diode 10622 conductings, so when the second switch of converter switches to pattern I from pattern III, the second switch of converter has the characteristic of zero voltage switching, causes the second switch switch cost of converter to reduce.
The present invention is described by above-mentioned related embodiment, yet above-described embodiment is only for implementing example of the present invention.Must be pointed out that the embodiment that has disclosed does not limit the scope of the invention.On the contrary, the change of doing without departing from the spirit and scope of the present invention and retouching all belong to scope of patent protection of the present invention.
Claims (15)
1. converter that can distribute input power is characterized in that it comprises:
Controller is in order to produce switch control signal, phase-veversal switch control signal, first pulse width modulation control signal and second pulse width modulation control signal;
Input unit in order to being coupled to DC power supply, and according to this first pulse width modulation control signal, stores and transmits the input power of this DC power supply;
The modulation unit is coupled to this input unit, in order to according to this second pulse width modulation control signal, receives the part of this input power, and according to the part of this input power, produces the also string ripple electric current of output full-wave rectification; And
Phase changer, be coupled to this modulation unit, in order to control signal according to this switch control signal and this phase-veversal switch, the string ripple electric current of changing this full-wave rectification becomes alternating current, and export this alternating current to load, wherein the frequency of the frequency of this switch control signal and this phase-veversal switch control signal and this load is identical;
Wherein this controller is according to this string ripple electric current, controls the activation time of this second pulse width modulation control signal, and the activation time of this second pulse width modulation control signal of the activation time ratio of this first pulse width modulation control signal is long.
2. converter as claimed in claim 1 is characterized in that, this DC power supply is solar panels or DC power supply.
3. converter as claimed in claim 2 is characterized in that, this input unit has the function of maximum power tracing.
4. converter as claimed in claim 3 is characterized in that, this input unit comprises:
First switch, have first end, second end and the 3rd end, this first switch, first end is coupled to first end of this DC power supply, this first switch, second end is in order to receive this first pulse width modulation control signal, and wherein this first switch is to open and close according to this first pulse width modulation control signal;
First coil has first end and second end, and this first coil, first end is coupled to the 3rd end of this first switch, and this first coil, second end is coupled to the first ground end;
Magnetizing inductance has first end and second end, and this magnetizing inductance first end is coupled to the 3rd end of this first switch, and this magnetizing inductance second end is coupled to this first ground end;
Second coil has first end and second end, and this second coil, second end is coupled to the second ground end, and wherein this second coil is in order to this first coil of magnetic coupling; And
First electric capacity has first end and second end, and this first electric capacity, first end is coupled to first end of this second coil, and this first electric capacity, second end is coupled to this modulation unit;
Perhaps, this input unit comprises:
First switch, have first end, second end and the 3rd end, this first switch, first end is coupled to first end of this DC power supply, this first switch, second end is in order to receive this first pulse width modulation control signal, and wherein this first switch is to open and close according to this first pulse width modulation control signal;
Magnetizing inductance has first end and second end, and this magnetizing inductance first end is coupled to the 3rd end of this first switch, and this magnetizing inductance second end is coupled to the first ground end; And
First electric capacity has first end and second end, and this first electric capacity, first end is coupled to the 3rd end of this first switch, and this first electric capacity, second end is coupled to this modulation unit.
5. converter as claimed in claim 4 is characterized in that, this modulation unit comprises:
Second switch, have first end, second end and the 3rd end, this second switch first end is coupled to second end of this first electric capacity, this second switch second end is in order to receive this second pulse width modulation control signal, and wherein this second switch is to open and close according to this second pulse width modulation control signal;
First diode has first end and second end, and this first diode, first end is coupled to this second ground end, and this first diode, second end is coupled to the 3rd end of this second switch;
First inductance has first end and second end, and this first inductance, first end is coupled to second end of this first diode; And
Second electric capacity has first end and second end, and this second electric capacity, first end is coupled to second end of this first inductance, and this second electric capacity, second end is coupled to this second ground end.
6. converter as claimed in claim 5 is characterized in that, this phase changer comprises:
The 3rd switch has first end, second end and the 3rd end, and the 3rd switch first end is coupled to first end of this second electric capacity, and the 3rd switch second end is in order to receive this switch control signal;
The 4th switch has first end, second end and the 3rd end, and the 4th switch first end is coupled to first end of this second electric capacity, and the 4th switch second end is in order to receive this phase-veversal switch control signal, and the 4th switch the 3rd end is coupled to second end of this load;
The 5th switch has first end, second end and the 3rd end, and the 5th switch first end is coupled to the 3rd end of the 3rd switch, and the 5th switch second end is in order to receive this phase-veversal switch control signal, and the 5th switch the 3rd end is coupled to this second ground end;
The 6th switch has first end, second end and the 3rd end, and the 6th switch first end is coupled to the 3rd end of the 4th switch, and the 6th switch second end is in order to receive this switch control signal, and the 6th switch the 3rd end is coupled to this second ground end; And
Second inductance has first end and second end, and this second inductance, first end is coupled to the 3rd end of the 3rd switch, and this second inductance, second end is coupled to first end of this load.
7. converter as claimed in claim 6 is characterized in that, it comprises in addition:
Filter capacitor, have first end and second end, this filter capacitor first end is coupled to first end of this DC power supply, and this filter capacitor second end is coupled to second end of this DC power supply, and wherein this filter capacitor is the high frequency ripple current on the direct voltage that provides in order to this DC power supply of filtering.
8. converter as claimed in claim 7, it is characterized in that, this input power is the product that equals the direct current that this direct voltage and this DC power supply provide, and wherein this controller is according to this direct current, controls the activation time of this first pulse width modulation control signal.
9. converter as claimed in claim 7 is characterized in that, the power output of this load is the product that equals the voltage of this alternating current and this load.
10. converter as claimed in claim 7, it is characterized in that, when this first switch and the unlatching of this second switch, the part of this input power is stored to this magnetizing inductance, and the remainder of this input power is transferred into this phase changer with the stored power of this first electric capacity through this modulation unit; Or
When this second switch is closed and during this first switch open, this input power is stored to this magnetizing inductance, and the stored power of this first inductance is output to this phase changer; Or
When this first switch and this second switch were all closed, the stored power of this magnetizing inductance saw through this first diode and is stored to this first electric capacity, and the stored power of this first inductance is output to this phase changer.
11. the method for operation of a converter, this converter comprise input unit, modulation unit, controller and phase changer, it is characterized in that, this method of operation comprises:
This controller produces first pulse width modulation control signal and second pulse width modulation control signal; And
This input unit is controlled signal according to this first pulse width modulation control signal and this modulation unit according to this second pulse width modulation, carries out corresponding action.
12. method of operation as claimed in claim 11 is characterized in that, this input unit is controlled signal according to this first pulse width modulation control signal and this modulation unit according to this second pulse width modulation, carries out this corresponding action and comprises:
When this first pulse width modulation control signal and the activation of this second pulse width modulation control signal, the magnetizing inductance of this input unit stores the part of this input power, and the stored power of first electric capacity of the remainder of this input power and this input unit is transferred into this phase changer (pattern I) through this modulation unit; Or
This input unit is according to this first pulse width modulation control signal, and this modulation unit is carried out this corresponding action and comprised according to this second pulse width modulation control signal:
When this first pulse width modulation control signal activation is deenergized with this second pulse width modulation control signal, the magnetizing inductance of this input unit stores this input power, and the stored power of first inductance of this modulation unit is output to this phase changer (pattern II); Or
This input unit is according to this first pulse width modulation control signal, and this modulation unit is carried out this corresponding action and comprised according to this second pulse width modulation control signal:
When this first pulse width modulation control signal all deenergizes with this second pulse width modulation control signal, the parasitic capacitance that the stored power of the magnetizing inductance of this input unit sees through the second switch of first diode of this modulation unit and this modulation unit is stored to first electric capacity of this input unit, and the stored power of first inductance of this modulation unit is output to this phase changer (pattern III).
13. method of operation as claimed in claim 11 is characterized in that, this DC power supply is solar panels or DC power supply.
14. method of operation as claimed in claim 13 is characterized in that, this input unit has the function of maximum power tracing.
15. method of operation as claimed in claim 11 is characterized in that, the activation time of this second pulse width modulation control signal of the activation time ratio of this first pulse width modulation control signal is long.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW102115461A TWI506941B (en) | 2013-04-30 | 2013-04-30 | Inverter capable of distributing input power and operation method thereof |
| CN201310165665.3A CN103337947B (en) | 2013-04-30 | 2013-05-08 | Transverter and the method for operating thereof of input power can be distributed |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW102115461A TWI506941B (en) | 2013-04-30 | 2013-04-30 | Inverter capable of distributing input power and operation method thereof |
| CN201310165665.3A CN103337947B (en) | 2013-04-30 | 2013-05-08 | Transverter and the method for operating thereof of input power can be distributed |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103337947A true CN103337947A (en) | 2013-10-02 |
| CN103337947B CN103337947B (en) | 2016-09-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310165665.3A Expired - Fee Related CN103337947B (en) | 2013-04-30 | 2013-05-08 | Transverter and the method for operating thereof of input power can be distributed |
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| CN (1) | CN103337947B (en) |
| TW (1) | TWI506941B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103337975A (en) * | 2013-05-08 | 2013-10-02 | 苏州达方电子有限公司 | Current source transverter and control method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8405367B2 (en) * | 2006-01-13 | 2013-03-26 | Enecsys Limited | Power conditioning units |
| CN1996711A (en) * | 2006-12-08 | 2007-07-11 | 广州电器科学研究院 | Inductive coupled wireless power transfer device |
| CN101267167B (en) * | 2008-01-09 | 2010-07-21 | 福州大学 | Voltage increase high-frequency link reverser |
| WO2011134057A1 (en) * | 2010-04-26 | 2011-11-03 | Queen's University At Kingston | Power converter for a power generator |
| TW201306435A (en) * | 2011-07-21 | 2013-02-01 | Univ Nat Cheng Kung | Photovoltaic power apparatus and photovoltaic power system |
| TWI478477B (en) * | 2012-12-25 | 2015-03-21 | Darfon Electronics Corp | Three-port single-phase single-stage micro-inverter and operation method thereof |
-
2013
- 2013-04-30 TW TW102115461A patent/TWI506941B/en not_active IP Right Cessation
- 2013-05-08 CN CN201310165665.3A patent/CN103337947B/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103337975A (en) * | 2013-05-08 | 2013-10-02 | 苏州达方电子有限公司 | Current source transverter and control method thereof |
| CN103337975B (en) * | 2013-05-08 | 2016-08-10 | 苏州达方电子有限公司 | Current source converter (csc) and control method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201442409A (en) | 2014-11-01 |
| TWI506941B (en) | 2015-11-01 |
| CN103337947B (en) | 2016-09-07 |
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