CN106817012B - Power control and power control method - Google Patents
Power control and power control method Download PDFInfo
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- CN106817012B CN106817012B CN201510856631.8A CN201510856631A CN106817012B CN 106817012 B CN106817012 B CN 106817012B CN 201510856631 A CN201510856631 A CN 201510856631A CN 106817012 B CN106817012 B CN 106817012B
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0038—Circuits or arrangements for suppressing, e.g. by masking incorrect turn-on or turn-off signals, e.g. due to current spikes in current mode control
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0048—Circuits or arrangements for reducing losses
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
The present invention provides a kind of power control and power control method, it includes a power supply circuit, a coil module, a switch and the power supply function circuit of a load circuit that power control, which is electrically connected at one, it and include that an at least timer, a zero current trigger unit, a status control unit and a switch driving unit, status control unit are equipped with first to fourth state interval.Power control method is when the timing time of timer institute timing reaches the timing section of above-mentioned each state interval, trigger transition status section, and in third or four state intervals, if the voltage value that an auxiliary winding voltage of the sensing coil of coil module is greater than the sensing threshold values that one is positive value from one falls to zero, triggering converts back first state section and the reclocking of triggering timing device and trigger switch driving unit open switch.The problems such as present invention adjusts operation mode according to load condition, can avoid high input peak current, high frequency switch cost, low frequency intermittent mode.
Description
Technical field
The present invention relates to a kind of power controls and power control method more particularly to one kind can be applied to distinct operation
The power control and power control method of mode.
Background technique
Existing such as laptop, tablet computer, personal digital assistant, video-game, video cameras are various
It is general straight in different voltages level with the direct current signal on a voltage level can be converted in portable electronic device
Stream signal (such as DC to DC converter), AC signal is converted into direct current signal (such as switcher for changing DC into AC), will be straight
Stream signal is converted to AC signal (such as switcher for changing DC into AC), or AC signal is converted to AC signal (such as direct current turn
Direct current transducer), wherein it is according to inductive energy storage group in the running of the AC DC power control in above-mentioned converter
The current status of part is distinguished: if control switch component enters conducting before zero-current point, being grasped for continuous conduction mode (CCM)
Make；If entering conducting in zero-current point control switch component, for critical conduction mode (BCM/CrM) operation；If detecting
It waits one section of delay time, then control switch to enter conducting after zero-current point, is then discontinuous conduction mode (DCM) operation.
However, existing power control can not be suitable for such as above-mentioned a variety of different operation modes, cause power supply
Control device can not switch to suitable operation mode according to load condition, thus power control is caused to have high input
Peak current, high frequency switch cost are generated into low frequency intermittent mode (BURST MODE), current waveform distortion with audio is entered
The disadvantages of audio noise, therefore existing power control still has improvement space.
Summary of the invention
A variety of different operation modes can not be generally applicable in view of the power control of the prior art, thus are generally had
There is the problem of power control can not switch to suitable operation mode according to load condition.Edge this, the present invention is to provide
A kind of power control and power control method, mainly include status control unit, and passing through status control unit will
The switch state of switch divides into four state intervals, to be applicable to various operations by setting four state intervals to reach
The purpose of mode.
Based on above-mentioned purpose, technical way of the present invention is to provide a kind of power control, is electrically
It is connected to a power supply function circuit, power supply function circuit includes a power supply circuit, a coil module, a switch and a load
Circuit, coil module are electrically coupled to power supply circuit, and switch is electrically coupled to coil module, and load circuit is electrically
It is connected to coil module, power supply circuit is provided for a supply voltage, and supply voltage is the sense made in coil module
Test coil generates an auxiliary winding voltage, and power control includes an at least timer, a zero current trigger unit, a state
Control unit and a switch driving unit.Timer is to one first timing time of timing, one second timing time, a third
Timing time and one the 4th timing time, zero current trigger unit are electrically coupled to coil module, in auxiliary winding electricity
When pressure falls to zero from the voltage value for being greater than the sensing threshold values that one is positive value, a zero current trigger signal is sent out.State control
Unit processed is electrically coupled to timer and zero current trigger unit, is equipped with a first state section, one second state interval, one
Third state section and one the 4th state interval, first state section corresponds to one first timing section, the second state interval
One second timing section is corresponded to, third state section corresponds to a third timing section, and the 4th state interval is corresponding
In one the 4th timing section, a unlatching section of switch is defined as first state section, and a closing section of switch is definition
Divide into the second state interval, third state section and the 4th state interval.Switch driving unit is electrically coupled to state control
Unit processed and switch.
Wherein, when original state control unit enters first state section, timer is to start the first timing time of timing,
And when the first timing time is up to the first timing section, status control unit is to enter the second state interval, and timer is timing
Second timing time, and when the second timing time is up to the second timing section, status control unit is to enter third state section,
Timer is timing third timing time, and when third timing time reaches third timing section, status control unit is to enter
4th state interval, timer are the 4th timing times of timing, and when the 4th timing time is up to the 4th timing section, state control
Unit processed is to reenter first state section and triggering timing device reclocking.Wherein, in status control unit in third shape
One of state section and the 4th state interval and when receiving zero current trigger signal, are to reenter first state section simultaneously
The reclocking of triggering timing device and trigger switch driving unit, which are opened, to be switched
Wherein, in the preferred embodiment of the attached technological means of above-mentioned power control, include also an arithmetic element, be
It is electrically connected at load circuit and status control unit, supply voltage is to generate a load voltage, arithmetic element in load circuit
To calculate the first timing section, the second timing section, third timing section and the 4th timing section according to load voltage.This
Outside, include also a zero current recording unit, be electrically coupled to zero current trigger unit and status control unit, in zero electricity
When stream trigger unit sends out zero current trigger signal, a zero current tracer signal is recorded and sends out, and control list in state
It is to reenter first state section and triggering timing device when member enters the 4th state interval and detects zero current tracer signal
Reclocking and trigger switch driving unit, which are opened, to be switched.In addition, being to maintain in status control unit in the second state interval
It turns off the switch.
Based on above-mentioned purpose, it is to answer that technical way of the present invention, which is also to provide a kind of power control method,
For above-mentioned power control, whether power control method is to first carry out (a) to judge the first timing time up to the first timing
Section, then (b) step (a) judging result be when, status control unit enter the second state interval, then execute step
Suddenly whether (c) judges the second timing time up to the second timing section, then executes step (d) in the judging result of step (c) and is
When being, status control unit enters third state section, then executes step (e) and judges to assist whether winding voltage is zero, connects
Execution step (f) step (e) judging result be when, status control unit reenters first state section, and touches
It sends out timer reclocking and trigger switch driving unit is opened and switched.Then step (g) is executed in the judging result of step (e)
When being no, judge whether third timing time reaches third timing section, then executes step (h) in the judging result of step (g)
When to be, status control unit enters the 4th state interval, then executes step (i) and judges to assist whether winding voltage is zero,
And step (j) is executed when the judging result of step (i) is to be, status control unit reenters first state section, and touches
It sends out timer reclocking and trigger switch driving unit is opened and switched.Then step (k) is executed in the judging result of step (i)
When being no, whether the 4th timing time is judged up to the 4th timing section, finally executes step (l) again in the judgement knot of step (k)
Fruit is when being, status control unit reenters first state section, and the reclocking of triggering timing device and trigger switch drive
Unit opens switch.
Wherein, in the preferred embodiment of the attached technological means of above-mentioned power control method, in step (j) and step (k)
Between be also judge that zero current records whether signal is zero comprising a step (j0), and be yes in the judging result of step (j0)
When, status control unit reenters first state section, and the reclocking of triggering timing device is opened with trigger switch driving unit
Breakdown closes.
Wherein, in the preferred embodiment of the attached technological means of above-mentioned power control method, supply voltage is in load electricity
Road generates a load voltage, before the step (a) also comprising a step (a0) according to load voltage calculate the first timing section,
Second timing section, third timing section and the 4th timing section.In addition, being remained off out between step (b) and step (c)
It closes, and also judges to assist whether winding voltage is zero comprising a step (b0) in step (b), and record when the judgment result is yes
One zero current occurs event and sends out a zero current tracer signal.
By after the technical way of power control of the present invention and power control method, due to passing through
Set four state intervals and be applicable to various operation modes, thus in practice use when can be adjusted according to load condition to compared with
Good operation mode, thus can effectively reduce high input peak current, high frequency switch cost, low frequency intermittent mode, current waveform
It distortion and solves the problems, such as existing the disadvantages of audio noise.
Specific embodiment of the present invention will be further described by embodiment below and schema.
Detailed description of the invention
Fig. 1 is that the power control of present pre-ferred embodiments is electrically connected at the first box of power supply function circuit and shows
It is intended to；
Fig. 2 is that the power control of present pre-ferred embodiments is electrically connected at the second box of power supply function circuit and shows
It is intended to；
Fig. 3 is timing section and the waveform diagram of load voltage of present pre-ferred embodiments；
Fig. 4 is that the power control of present pre-ferred embodiments is applied to the waveform diagram of boundary conduction mode；
Fig. 5 is that the power control of present pre-ferred embodiments is applied to the waveform diagram of discontinuous conduction mode；
Fig. 6 is that the power control of present pre-ferred embodiments is applied to the waveform diagram that underloading determines frequency mode；
Fig. 7 is that the power control of present pre-ferred embodiments is applied to the waveform diagram of continuous conduction mode；Fig. 8
It is the flow diagram of the power control method of present pre-ferred embodiments with Fig. 8 A.
Appended drawing reference:
1: power control
11: timer
12: zero current trigger unit
13: status control unit
14: switch driving unit
15: arithmetic element
16: zero current recording unit
2,2a: power supply function circuit
21,21a: power supply circuit
22,22a: coil module
221: induction coil
23,23a: switch
24,24a: load circuit
100,200,300: curve
A: threshold values
T1: the first timing time
T2: the second timing time
T3: third timing time
T4: the four timing time
Vzcd_th: threshold values
S101-S113: steps flow chart
S1: zero current trigger signal
Specific embodiment
Due in power control provided by the present invention and power control method, a combination thereof embodiment is unequal to piece
It lifts, therefore this is no longer going to repeat them, only enumerates a preferred embodiment and is illustrated.
Power supply is electrically connected at also referring to the power control that Fig. 1 and Fig. 2, Fig. 1 are present pre-ferred embodiments
First block diagram of functional circuit, Fig. 2 are to show that the power control of present pre-ferred embodiments is electrically connected at electricity
Second block diagram of source functional circuit.
As shown, the power control 1 of present pre-ferred embodiments be electrically coupled to a power supply function circuit 2,
2a, power supply function circuit 2,2a separately include a power supply circuit 21,21a, a coil module 22,22a, a switch 23,23a
With a load circuit 24,24a, coil module 22,22a are electrically coupled to power supply circuit 21,21a, and switch 23,23a are
It is electrically connected at coil module 22,22a, load circuit 24,24a are electrically coupled to coil module 22,22a.One is needed herein
Be mentioned that, power supply function circuit 2 be for flyback (flyback) topology, power supply function circuit 2a is then the Boost power factor
Correct circuit (Power factor Correction；PFC) topological, wherein the topology only act of power supply function circuit 2,2a
Example, the scope being not intended to limit the invention, and power supply circuit 21,21a, coil module 22,22a, switch 23,23a and
Load circuit 24,24a composition be and for convenience of explanation, to be only below with power supply function circuit 2 depending on the design of practice
Example is illustrated.
Power control 1 be include an at least timer 11, a zero current trigger unit 12, a status control unit
13, a switch driving unit 14, an arithmetic element 15 and a zero current recording unit 16.Wherein, although the present invention is preferably real
It applies and only discloses a timer 11 in example, more than one timer 11 can be used to realize in other embodiments, and timer
11 built-up circuit is the prior art, therefore is repeated no more.
Zero current trigger unit 12 is electrically coupled to the sensing coil 221 of coil module 22, and status control unit 13 is
It is electrically connected at zero current trigger unit 12 and timer 11, and status control unit 13 is equipped with a first state section (area ON
Between), one second state interval (section OFF), a third state section (section Soft-Window (SW)) and one the 4th state area
Between (section Hard-Window (HW)), first state section corresponds to one first timing section, and the second state interval is corresponding
In one second timing section, third state section corresponds to a third timing section, and the 4th state interval corresponds to one
Four timing sections, above-mentioned timing section is the section for a period of time, and a unlatching section of switch 23 (can also claim that area is connected
Between) it is defined as first state section, a closing section of switch 23 is that the second state interval, third state area are divided into definition
Between with the 4th state interval, that is to say, that switch 23 is all considered as first state section when opening, and closes in switch 23
When be divided into the second state interval, third state section and the 4th state interval, will be discussed in more detail below.
Switch driving unit 14 is electrically coupled to status control unit 13, and arithmetic element 15 is electrically coupled to electrically connect
Be connected to load circuit 24 and status control unit 13, zero current recording unit 16 be electrically coupled to zero current trigger unit 12 with
Status control unit 13.Wherein, zero current trigger unit 12, status control unit 13, switch driving unit 14, arithmetic element 15
Being with zero current recording unit 16 can be depending on the design of practice with analog circuit or digital circuit, for example,
Zero current trigger unit 12 and zero current recording unit 16 are not can to present with the combination of (and) door and SR latch unit, but not
It is limited to this.
Wherein, in general, power supply circuit 21 is to can provide a supply voltage, this supply voltage is generally via filter
Voltage after wave and bridge rectifier, and voltage is supplied when being sent to coil module 22, it is the sensing made in coil module 22
Coil 221 generates auxiliary winding voltage (being commonly defined as VZCD), wherein sensing coil 221 is usually the line for secondary side
Circle, to incude the electric current of first siding ring, and auxiliary winding voltage above-mentioned will be described in detail under.In addition, supply
When voltage is sent to load circuit 24, a load voltage can be generated in load circuit 24, this load voltage can be the electricity at resistance
The voltage of pressure or photo-coupler, is depending on the design of practice.
Timer 11 is (following fixed to one first timing time (hereinafter defined as t1) of timing, one second timing time
Justice is t2), a third timing time (hereinafter defined as t3) and one the 4th timing time (hereinafter defined as t4), specifically,
When timer 11 is that sequentially timing goes out the first timing time t1, the second timing time t2, third timing time t3 and four timing
Between t4, that is, the first timing time t1 timing it is complete after start the second timing time of timing t2 etc. the rest may be inferred.
Zero current trigger unit 12 is the sensing threshold values Vzcd_ to be greater than one certainly in auxiliary winding voltage VZCD for positive value
When a voltage value of th falls to zero, a zero current trigger signal S1 is sent out, and needs one to be mentioned that herein, switch 23 is closing
When closing, above-mentioned auxiliary winding voltage VZCD can be generated in sensing coil 221, and sense threshold values and be generally positive value and be circuit pair
The value (as shown in fig. 4 to fig. 6) of the lowest detection ability of voltage, this auxiliary winding voltage VZCD can be by an oscillation sections
(alternatively referred to as frequency of oscillation) and be gradually zero.
Arithmetic element 15 is to calculate institute in above-mentioned status control unit 13 according to the load voltage in load circuit 24
Equipped with the first timing corresponding to first state section, the second state interval, third state section and the 4th state interval difference
Section, the second timing section, third timing section and the 4th timing section.It specifically, is this hair also referring to Fig. 3, Fig. 3
The timing section of bright preferred embodiment and the waveform diagram of load voltage, as shown in figure 3, curve 100 represents the first timing area
Between time value, curve 200 represents the time value in the second timing section, and curve 300 represents the time value in the 4th timing section.By
The relationship in the first timing section, the second timing section and the 4th timing section and load voltage known to Fig. 3.
Specifically, the first timing section is directly proportional to the real value of load voltage (voltage value i.e. instantly), and the
Two timing sections be with load voltage different time output average value (i.e. the voltage value of different time output is averaged, such as
1st, 2,3 second voltage is averaged) it is inversely proportional, third timing section is 1.5 to 2 times of above-mentioned oscillation section, the 4th timing area
Between be in output average value of different time be minimum predetermined operation frequency lower than certain preset threshold values (such as threshold values A in Fig. 3)
Rate is the relationship being inversely proportional with output of different time average value after being greater than the threshold values into fixed value, wherein above-mentioned each
The explanation in timing section is only for example, and is not limited to this in other embodiments.
Zero current recording unit 16 is to record when zero current trigger unit 12 sends out zero current trigger signal S1
And a zero current tracer signal (not shown) is sent out, and enter the 4th state interval in status control unit 13 and detect zero
When electric current tracer signal, reenters first state section and reset by triggering, and the side of event occurs for one zero current of above-mentioned record
Formula is, for example, that digital signal is set as 1 so that system is learnt.
For in practice, do not considering to assist winding voltage VZCD under the voltage value for being greater than sensing threshold values Vzcd_th
When state when being reduced to zero, in general, switch 23 is to open, and status control unit 13 enters first state section when initial
When, timer 11 be it is synchronous start the first timing time of timing t1, and when the first timing time t1 is up to the first timing section, meeting
Triggering state control unit 13 enters the second state interval, at this point, 11 time synchronisation the second timing time t2 of timer, and the
When two timing time t2 are up to the second timing section, can triggering state control unit 13 enter third state section, while timer
11 timing third timing time t3, and when third timing time t3 reaches third timing section, triggering state control unit 13 is
Into the 4th state interval, also the 4th timing time t4 of time synchronisation of timer 11, and in the 4th timing time t4 up to the 4th meter
When section when, status control unit 13 is to reenter first state section and 11 reclocking of triggering timing device.That is,
Status control unit 13 can be as timing time be up to timing section and sequentially into NextState.
Wherein, considering to occur to assist winding voltage VZCD under the voltage value for being greater than sensing threshold values Vzcd_th
When state when being reduced to zero, if status control unit 13 is in the second state interval and receives transmitted by zero current trigger unit 12
It is to remain off switch 23 when zero current trigger signal S1 out, that is to say, that even if receiving zero current trigger signal S1
It is not turned on switch 23, and when the 4th timing time t4 is up to the 4th timing section, status control unit 13 reenters the first shape
State section and 11 reclocking of triggering timing device and trigger switch driving unit 14 open switch 23.
One, one of third state section and the 4th state interval and zero electricity is received in status control unit 13
When flowing trigger signal S1, first state section simultaneously 11 reclocking of triggering timing device and trigger switch driving unit 14 are reentered
Switch 23 is opened, i.e., is directly entered as long as long as third state section or the 4th state interval receive zero current trigger signal S1
First state section and open switch 23.If up to the 4th timing section and detecting zero current record letter in the 4th timing time t4
Number when, reenter first state section and 11 reclocking of triggering timing device and trigger switch driving unit 14 opened and switched
23。
In order to make one skilled in the art of the present invention that can will readily appreciate that running of the invention, illustrate in detail below
Bright, referring to Figure 4 together, Fig. 4 is that the power control of present pre-ferred embodiments is applied to the waveform of boundary conduction mode
Schematic diagram, as shown in figure 4, initial switch 23, when opening, timer 11 starts the first timing time of timing t1, at this time state control
Unit 13 processed is to be in first state section, and reach the first timing area corresponding to first state section in the first timing time t1
Between when, can triggering state control unit 13 enter the second state interval and switch 23 can be into closed state, triggering timing at this time
Device 11 starts the second timing time of timing t2, and in the second timing time t2 up to the second timing area corresponding to the second state interval
Between when, can triggering state control unit 13 enter third state section, at this time simultaneously triggering timing device 11 start timing third meter
When time t3, by third state section, assist known in figure winding voltage at the end of fast close to third state section from
Voltage value greater than sensing threshold values Vzcd_th declines and vibrates to zero, triggers zero current trigger unit 12 at this time and sends out zero electricity
Trigger signal S1 is flowed, while so that zero current recording unit 16 is recorded zero current and event (digital logic signal 1) occurs, and making
The triggering resetting of status control unit 13 timer 11 (digital logic signal 1) and trigger switch driving unit 14 open switch 23
And reenter first state section.One is needed to be mentioned that herein, in boundary conduction mode, corresponding to the 4th state interval
Four timing sections are much smaller than other definition of timing section without being indicated, in other embodiments, to the 4th state interval
It can be the summation that the 4th timing section corresponding to it is the first timing section to third timing section, that is to say, that the present invention
Preferred embodiment can be the section behind third timing section to the 4th timing section defined in the 4th state interval, can also be
The summation in the first timing section to third timing section, is chatted bright hereby.
Please refer to fig. 5, the power control that Fig. 5 is present pre-ferred embodiments is applied to discontinuous conduction mode
Waveform diagram, repeated no more as shown in figure 5, first state section is identical as Fig. 4, and by figure it is found that in the second state
It assists winding voltage to have from the voltage value decline oscillation of sensing threshold values Vzcd_th is greater than to zero when section, but still maintains to close at this time
Make and break close and when the second timing time t2 is up to the second timing section corresponding to the second state interval, triggering state control unit
13 enter third state sections, and triggering timing device 11 starts timing third timing time t3 simultaneously at this time, by known in figure the
Three condition section terminates but does not also have auxiliary winding voltage to be greater than certainly yet up to the 4th timing section corresponding to the 4th state interval
Sensing threshold values Vzcd_th voltage value fall to zero situation (the 4th timing section much smaller than other timing sections without giving
Mark, is chatted bright hereby) when, but status control unit 13 is still continuously detected zero current tracer signal and reenters first at this time
State interval and 11 reclocking of triggering timing device and trigger switch driving unit 14 open switch 23.
Referring to Figure 6 together, Fig. 6 is that the power control of present pre-ferred embodiments determines frequency mode applied to underloading
Waveform diagram, as shown in fig. 6, determining in frequency mode (GM) in underloading, it is in the second state interval and third shape known in figure
The situation that auxiliary winding voltage falls to zero from the voltage value for being greater than sensing threshold values Vzcd_th is all not detected in state section, causes
When the 4th timing time t4 is identical as the 4th timing section corresponding to the 4th state interval, directly make status control unit 13
Triggering resetting timer 11 and trigger switch driving unit 14 open switch 23 and reenter first state section.
Referring to Figure 7 together, Fig. 7 is that the power control of present pre-ferred embodiments is applied to continuous conduction mode
Waveform diagram, as shown in fig. 7, it determines with underloading, frequency mode is identical, it is in the second state interval and third shape known in figure
The situation that auxiliary winding voltage falls to zero from the voltage value for being greater than sensing threshold values Vzcd_th is all not detected in state section, causes
When the 4th timing time t4 is identical as the 4th timing section corresponding to the 4th state interval, directly make status control unit 13
Triggering resetting timer 11 and trigger switch driving unit 14 open switch 23 and reenter first state section.
As known from the above, boundary conduction mode, discontinuous conduction mode and underloading determine frequency mode all and be with detect assist around
Whether resistance voltage falls to zero from the voltage value for being greater than sensing threshold values Vzcd_th and opens the mode of switch 23 in trough triggering,
Its difference is only that the delay of triggering and can't detect auxiliary winding voltage under the voltage value for being greater than sensing threshold values Vzcd_th
Processing when being reduced to zero, wherein if the oscillation intensity of auxiliary winding voltage is enough (greater than sensing valve shown in fig. 4 to fig. 6
Value Vzcd_th), as long as then detect that zero current opens switch 23 in third state section or the 4th state interval, or
It detects in the second state interval and then remembers when auxiliary winding voltage falls to zero from the voltage value for being greater than sensing threshold values Vzcd_th
Record zero current and event and the direct triggering and conducting switch 23 at the end of third state section occur, as long as therefore user actually
The preferable mode of operation of power control 1 just can be changed in the length for controlling timing section corresponding to each state interval.
Wherein, power control of the present invention can also be controlled operating frequency, for example, on boundary
Under conduction mode (BCM/CrM), the period is that the first timing time adds a coil module nature discharge time values (tzcd), this line
Module nature discharge time values (referring to the time value that coil module 22 discharges naturally) is enclosed less than the second timing time, third timing
The summation of time and the 4th timing time, therefore when the load decreases, it optionally controls the second timing time and rises (as schemed
Shown in 3)；And when determining frequency mode, the period is the summation of the first timing time to the 4th timing time, and in the state of pole underloading
When, the second timing time much larger than the first timing time, third timing time and the 4th timing time summation, therefore the period and
The ratio of frequency is approximately equal to the second timing time.
In addition, the first timing time rises when switching to heavy condition, the decline of the second timing time is approximately the zero, the 4th
Timing time also declines, when above-mentioned time value is total with the 4th timing time greater than the second timing time, third timing time
And when, then it is continuous conduction mode.Therefore, as long as the linear operating frequency for being selectively controlled in each section according to Fig. 3.
Wherein, it should be noted that present pre-ferred embodiments set the meaning of the second state interval to limit most
High switching frequency, to prevent from all having very much excessively high switching frequency in short-term in the time of the unlatching of switch 23 and the time of zero current, into
And reduce switch cost.And the effect for setting the 4th state interval has two, it is very short when the opening time in underloading and switch 23
When situation, assist the current potential of winding voltage generally very low and may allow power control 1 zero current trigger unit 12 with
Zero current recording unit 16 can't detect, therefore pass through the second state interval, third state section and the 4th state interval, and the 4th
It forces to open switch 23 at the end of state interval.
In addition, assisting the current potential of winding voltage usually can power supply source control dress when system is in the case where medium load
It sets 1 detection, therefore is usually that will not enter the 4th state interval, and when overloaded, from the figure 3, it may be seen that when load voltage rises to
After certain degree, the 4th state interval is set, so that the summation of the second timing time to the 4th timing time is less than the above-mentioned time
Value, zero current condition not yet occurs at this time, forces to make switch 23 to be opened by the end of this 4th state interval, then by boundary
Conduction mode enters continuous conduction mode.
It is the stream for showing the power control method of present pre-ferred embodiments also referring to Fig. 1 to Fig. 8 A, Fig. 8 and Fig. 8 A
Journey schematic diagram, as shown, power control method comprises the steps of:
Step S101: the first timing section, the second timing section, third timing section and the are calculated according to load voltage
Four timing sections；
Step S102: status control unit 13 enters first state section and opens switch 23；
Step S103: judge the first timing time t1 whether up to the first timing section；
Step S104: status control unit 13 enters the second state interval and turns off the switch 23；
Step S105: judge to assist whether winding voltage falls to from greater than one for a voltage value of the sensing threshold values of positive value
Zero；
Step S106:, which remaining off switch 23, and records a zero current occurs event；
Step S107: judge the second timing time t2 whether up to the second timing section；
Step S108: status control unit 13 enters third state section；
Step S109: judge that the voltage value for assisting winding voltage whether to be greater than sensing threshold values certainly falls to zero；
Step S110: status control unit 13 reenters first state section, and 11 reclocking of triggering timing device with
Trigger switch driving unit 14 opens switch 23；
Step S111: judge whether third timing time t3 reaches third timing section
Step S112: status control unit 13 enters the 4th state interval；
Step S113: judge whether that zero current record event occurs；
Step S114: judge that the voltage value for assisting winding voltage whether to be greater than sensing threshold values certainly falls to zero；
Step S115: judge the 4th timing time t4 whether up to the 4th timing section.
Wherein, the judging result of above-mentioned steps S109, step S113, step S114 and step S115 are all to execute step to be
Rapid S110 can not execute step S105 and step S106 and directly execute to reopen switch 23, and in other embodiments
Step S107, remaining embodiment is identical as power control 1, therefore is no longer repeated.In addition, institute in step S113
The zero current record event of finger can be for event occurs for step S106 meaning zero current and records zero current defined in this event
Record event can also refer to whether the 4th state interval occurs the zero current record that new zero current occurs event and records instantly
Event is depending on the design of practice.
Therefore, after using power control of the present invention and power control method, due to passing through setting four
State interval and be applicable to various operation modes, therefore while using in practice, can be adjusted according to load condition to preferable operation
Mode, thus can effectively reduce high input peak current, high frequency switch cost, low frequency intermittent mode, current waveform distortion and sound
The disadvantages of frequency noise and solve the problems, such as existing.
By the above detailed description of preferred embodiments, it is intended to more clearly describe feature and spirit of the invention,
And not scope of the invention is limited with above-mentioned revealed preferred embodiment.On the contrary, the purpose is to uncommon
Various changes can be covered and have being arranged in the scope of the claim to be protected of the invention of equality by hoping.
Claims (7)
1. a kind of power control, which is characterized in that be electrically coupled to a power supply function circuit, the power supply function circuit
It is electrically coupled to described comprising a power supply circuit, a coil module, a switch and a load circuit, the coil module
Power supply circuit, the switch are electrically coupled to the coil module, and the load circuit is electrically coupled to the line
Module is enclosed, the power supply circuit is provided for a supply voltage, and the supply voltage makes in the coil module
One sensing coil generates an auxiliary winding voltage, and the power control includes:
An at least timer is to one first timing time of timing, one second timing time, a third timing time and 1
Four timing times；
One zero current trigger unit, is electrically coupled to the coil module, to be greater than in the auxiliary winding voltage from one
When falling to zero for the voltage value of a sensing threshold values of positive value, a zero current trigger signal is sent out；
One status control unit is electrically coupled to the timer and the zero current trigger unit, is equipped with a first state
Section, one second state interval, a third state section and one the 4th state interval, the first state section corresponds to one
First timing section, second state interval correspond to one second timing section, and the third state section corresponds to
One third timing section, the 4th state interval correspond to one the 4th timing section, and a unlatching section of the switch is
It is defined as the first state section, a closing section of the switch is that second state interval, described is divided into definition
Third state section and the 4th state interval；And
One switch driving unit, is electrically coupled to the status control unit and the switch；
Wherein, when the initial status control unit enters the first state section, the timer is started described in timing
First timing time, and when first timing time reaches the first timing section, the status control unit is to enter
Second state interval, the timer are the second timing times described in timing, and in second timing time described in
When the second timing section, the status control unit is to enter the third state section, and the timer is the described in timing
Three timing times, and when the third timing time reaches the third timing section, the status control unit is to enter institute
The 4th state interval is stated, the timer is the 4th timing time described in timing, and in the 4th timing time up to described the
When four timing sections, the status control unit is to reenter the first state section and trigger the timer to count again
When；
Wherein, it in the third state section and one in the 4th state interval and is received in the status control unit
It is to reenter the first state section and trigger the timer reclocking and touching when to the zero current trigger signal
It sends out described and switchs the driving unit unlatching switch；
It is to maintain to close in the status control unit in second state interval and when receiving the zero current trigger signal
Close the switch.
2. power control according to claim 1, which is characterized in that also include an arithmetic element, be to be electrically connected
In the load circuit and the status control unit, the supply voltage is to generate a load voltage in the load circuit,
The arithmetic element is to calculate first timing section, second timing section, described according to the load voltage
Third timing section and the 4th timing section.
3. power control according to claim 1, which is characterized in that it also include a zero current recording unit, it is described
Zero current recording unit is electrically coupled to the zero current trigger unit, to send out institute in the zero current trigger unit
When stating zero current trigger signal, event occurs for one zero current of record.
4. power control according to claim 1, which is characterized in that reach the 4th timing in the 4th timing time
Section and when the auxiliary winding voltage is not zero, the status control unit is to reenter the first state section and touch
Send out timer reclocking described.
5. a kind of power control method is to be applied to power control according to claim 1, which is characterized in that institute
Power control method is stated to comprise the steps of:
(a) judge whether first timing time reaches first timing section；
(b) when the judging result of the step (a), which is, is, the status control unit enters second state interval；
(c) judge whether second timing time reaches second timing section；
(d) when the judging result of the step (c), which is, is, the status control unit enters the third state section；
(e) judge whether the auxiliary winding voltage falls to from greater than described for the voltage value of the sensing threshold values of positive value
Zero；
(f) when the judging result of the step (e), which is, is, the status control unit reenters the first state area
Between, and trigger the timer reclocking and trigger the switch driving unit and open the switch；
(g) when the judging result of the step (e) is no, judge whether the third timing time reaches third timing area
Between；
(h) when the judging result of the step (g), which is, is, the status control unit enters the 4th state interval；
(i) judge whether the auxiliary winding voltage falls to from greater than described for the voltage value of the sensing threshold values of positive value
Zero；
(j) when the judging result of the step (i), which is, is, the status control unit reenters the first state area
Between, and trigger the timer reclocking and trigger the switch driving unit and open the switch；
(k) when the judging result of the step (i) is no, judge whether the 4th timing time reaches the 4th timing area
Between；And
(l) when the judging result of the step (k), which is, is, the status control unit reenters the first state area
Between, and trigger the timer reclocking and trigger the switch driving unit and open the switch.
6. power control method according to claim 5, which is characterized in that the supply voltage is in the load circuit
A load voltage is generated, also calculates described the according to the load voltage comprising a step (a0) before the step (a)
One timing section, second timing section, third timing section and the 4th timing section.
7. power control method according to claim 5, which is characterized in that the step (b) and the step (c) it
Between also comprise the steps of:
(b0) judge whether the auxiliary winding voltage falls to from greater than described for the voltage value of the sensing threshold values of positive value
Zero；And
(b1) it when the judging result of the step (b0), which is, is, remains off the switch and records zero current generation thing
Part.
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| CN201510856631.8A CN106817012B (en) | 2015-11-30 | 2015-11-30 | Power control and power control method |
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| CN201510856631.8A CN106817012B (en) | 2015-11-30 | 2015-11-30 | Power control and power control method |
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| CN106817012B true CN106817012B (en) | 2018-12-07 |
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| CN110445352B (en) * | 2018-11-26 | 2020-08-21 | 江西滨凌科技有限公司 | Method and device for reducing power consumption of frequency converter of integrated scroll compressor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4174496A (en) * | 1978-08-02 | 1979-11-13 | Rockwell International Corporation | Monolithic solid state power controller |
| US5497311A (en) * | 1994-03-22 | 1996-03-05 | Yokogawa Electric Corporation | Switching power source of the voltage resonance type |
| CN103312176A (en) * | 2012-03-12 | 2013-09-18 | 凌力尔特公司 | Isolated flyback converter with sleep mode for light load operation |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2490918B (en) * | 2011-05-18 | 2013-05-15 | Ikon Semiconductor Ltd | A switched mode power supply |
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2015
- 2015-11-30 CN CN201510856631.8A patent/CN106817012B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4174496A (en) * | 1978-08-02 | 1979-11-13 | Rockwell International Corporation | Monolithic solid state power controller |
| US5497311A (en) * | 1994-03-22 | 1996-03-05 | Yokogawa Electric Corporation | Switching power source of the voltage resonance type |
| CN103312176A (en) * | 2012-03-12 | 2013-09-18 | 凌力尔特公司 | Isolated flyback converter with sleep mode for light load operation |
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