Summary of the invention
In order to overcome existing control method that can present formula interface circuit in full-load range without decree single input and multi-output
Highest or secondary efficient deficiency can be obtained to maximum probability to all load combinations, the present invention provides one kind in full load model
Enclose it is interior to all load combinations can obtain to maximum probability highest or secondary efficient peak efficiency operating point register control and
Method.
The technical solution adopted by the present invention to solve the technical problems is:
A kind of peak efficiency operating point register control, the peak efficiency operating point register control #J is from DC bus
Place obtains the input signal aj of channel circuit #J, the output signal bj of channel circuit #J is obtained from load #J, according to acquisition
Input signal aj and output signal bj provides the control of switched inductors branch #J and single tube energy storage branch #J in channel circuit #J respectively
Signal processed, i.e. duty ratio Dj (k) and duty ratio Daj (m), the value of J are 1 to N, and the value of j is 1 to n;
The peak efficiency operating point register control #J positions sub-controller #J and monocycle sub-controller #J by operating point
Composition, the duty ratio Daj (m) of single tube energy storage branch #J is generated by operating point positioning sub-controller #J, and effect is to guarantee input
The discrete average value Aj (m) of signal aj is in minimum value, and the value of m is 1 to ∞;Switched inductors are generated by monocycle sub-controller #J
The duty ratio Dj (k) of branch #J, effect are to guarantee that the discrete average value Bj (k) of output signal bj is equal to reference signal Bref, k
Value be 1 to ∞.
Further, the operating point positioning sub-controller #J is by sampler #J, averager #J, minimum value determining device #J, number
According to latch #J, data stack #J1, data stack #J2 composition, the operating point positioning sub-controller #J works in peak efficiency
Point location controller #J starts or first carries out Scan orientation operation after restarting, then carries out recurrence positioning operation, and setting operating point is fixed
The Scan orientation duty cycle of seat controller #J is Tb=yTs and operating point positions the recurrence positioning work of sub-controller #J
Period is Tc=zTs, and Ts is the duty cycle of switched inductors branch #J and single tube energy storage branch #J, and y is the integer greater than zero, z
For the integer greater than zero.
Further, the monocycle sub-controller #J uses PWM controller (such as various PID controllers), setting monocycle
The duty cycle of controller #J is Ta=xTs, and Ts is the duty cycle of switched inductors branch #J and single tube energy storage branch #J, and x is
Integer greater than zero, current monocycle control duty cycle Ta (k) output duty cycle Dj (k) to switched inductors branch #J, open by control
The switching tube Mj in inductive branch #J is closed, the discrete average value Bj (k) of output signal bj is made to be equal to reference signal Bref.
In order to preferably coordinate the work of switched inductors branch #J and single tube energy storage branch #J, x < y and x < z can be set.
Further, the peak efficiency operating point register control #J uses digital signal processor.
The controller further includes central processing unit and bus, is managed collectively peak efficiency work by central processing unit
The working condition of point location controller #1 to peak efficiency operating point register control #N, central processing unit by bus to
Peak efficiency operating point register control #1 to peak efficiency operating point register control #N transmitting starting or instruction of restarting, highest
Efficiency work point location controller #1 to peak efficiency operating point register control #N also by bus to central processing unit
Transmit the jump signal of the discrete average value set A (m) of input signal, A (m)={ A1 (m), A2 (m) ..., An (m) }.
The input signal aj includes input voltage, input current and input power, and the output signal bj includes output
Voltage, output electric current and output power.
A kind of peak efficiency operating point position control method, the control method the following steps are included:
(1) after register control #J in peak efficiency operating point starts or restarts, operating point positioning sub-controller #J is introduced into
Scan orientation mode of operation, the duty cycle Tb=yTs of setting Scan orientation operation, Ts is switched inductors branch #J and single tube stores up
The duty cycle of energy branch #J, y are the integer greater than zero;
(2) further according to the data in the DC bus-bar voltage of setting and loading range configuration work point location sub-controller #J
Storehouse #J1, by one group using Δ Da as the duty cycle data at interval, i.e. Daj_max ..., Daj_min+ Δ Da, Daj_min are carried
Enter in data stack #J1;
(3) it is fixed to obtain Current Scan from data stack #J1 in order for operation Current Scan positioning duty cycle Tb (m)
The duty ratio Daj (m) of position duty cycle Tb (m) is simultaneously exported to single tube energy storage branch #J, controls opening in single tube energy storage branch #J
Pipe Maj is closed, the value of m is 1 to Y;
(4) after channel circuit #J the operation is stable, input signal aj is through the sampler # in operating point positioning sub-controller #J
The discrete value aj (m) of input signal is obtained after J processing;
(5) the discrete value aj (m) of input signal is obtained after the averager #J processing in operating point positioning sub-controller #J
The discrete average value Aj (m) of input signal;
(6) the discrete average value Aj (m) of input signal is through the minimum value determining device #J in operating point positioning sub-controller #J
Judgement, if judging Aj (m) for current minimum value, minimum value determining device #J triggers the data in operating point positioning sub-controller #J
It is current Daj (m), i.e. Daj_opt=Daj (m) that latch #J, which updates optimal duty ratio Daj_opt,;If judging, Aj (m) is not
Current minimum value, then data latches #J retains former optimal duty cycle data;
(7) if m=Y, show that entire Scan orientation operation is completed, the operating point positioning sub-controller #J, which will enter, to be returned
Positioning operation state;Otherwise, next Scan orientation duty cycle Tb (m+1) is run, m=m+1 is enabled, repeats step (3) extremely
(7);
(8) the operating point positioning sub-controller #J enters the positioning operation state that returns, and setting returns the work of positioning operation
Make cycle T c=zTs, Ts is the duty cycle of switched inductors branch #J and single tube energy storage branch #J, and z is the integer greater than zero;
(9) according in the optimal duty ratio Daj_opt configuration work point location sub-controller #J in data latches #J
Data stack #J2, by one group using Δ Db as the duty cycle data at interval, i.e. Daj_opt ..., Daj_max- Δ Db, Daj_max
It is loaded into data stack #J2;
(10) current recurrence positioning duty cycle Tc (m) of operation obtains current return from data stack #J2 in order and determines
The duty ratio Daj (m) of bit period Tc (m) is simultaneously exported to single tube energy storage branch #J, controls the switching tube in single tube energy storage branch #J
The value of Maj, m are Y+1 to ∞;
(11) run next recurrences positioning duty cycle Tc (m+1), enable m=m+1, repeat step (10) to (11) up to
Peak efficiency operating point register control #J is restarted or channel circuit #J stops working.
Further, in the step (2), using Δ Da as the maximum duty cycle Daj_max at interval to minimum duty cycle Daj_
The duty cycle data of min is that { Daj_max ..., Daj_min+ Δ Da, Daj_min } is loaded into data stack #J1;The step
(3) in, the value sequence of duty ratio Daj (m) is as follows: Daj (1)=Daj_min, Daj (2)=Daj_min+ Δ Da ..., Daj
(Y)=Daj_max, Y=1+ (Daj_max-Daj_min)/Δ Da;In the step (9), by one group using Δ Db as interval most
The duty cycle data of excellent duty ratio Daj_opt to maximum duty cycle Daj_max, i.e., Daj_opt ..., Daj_max- Δ Db,
Daj_max } it is loaded into data stack #J2;In the step (10), the value sequence of duty ratio Daj (m) is as follows: Daj (Y+1)
=Daj_max, Daj (Y+2)=Daj_max- Δ Db ..., Daj (Y+Z)=Daj_opt ..., Daj (∞)=Daj_opt, Z=
1+(Daj_max-Daj_opt)/ΔDb。
Either: in the step (2), be loaded into duty cycle data sequence be Daj_min, Daj_min+ Δ Da ...,
Daj_max};In the step (3), the value sequence of duty ratio Daj (m) are as follows: Daj (1)=Daj_max, Daj (2)=Daj_
Max- Δ Da ..., Daj (Y)=Daj_min, Y=1+ (Daj_max-Daj_min)/Δ Da;In the step (9), loading is accounted for
Sky is { Daj_opt ..., Daj_min+ Δ Db, Daj_min } than the content and sequence of data;In the step (10), duty ratio
The value sequence of Daj (m) are as follows: Daj (Y+1)=Daj_min, Daj (Y+2)=Daj_min+ Δ Db ..., Daj (Y+Z)=Daj_
Opt ..., Daj (∞)=Daj_opt, Z=1+ (Daj_opt-Daj_min)/Δ Db.
Further, in the base of peak efficiency operating point register control #1 to peak efficiency operating point register control #N
On plinth, then central processing unit and bus are added, peak efficiency operating point register control # is managed collectively by central processing unit
1 to peak efficiency operating point register control #N working condition, central processing unit are worked by bus to peak efficiency
Point location controller #1 to peak efficiency operating point register control #N transmitting starting or instruction of restarting, peak efficiency operating point are fixed
Level controller #1 to peak efficiency operating point register control #N transmits input signal to central processing unit also by bus
Discrete average value set A (m) jump signal, A (m)={ A1 (m), A2 (m) ..., An (m) }.
The workflow of the central processing unit is as follows:
(i) after single input and multi-output can present the booting of formula interface circuit, central processing unit successively starts peak efficiency operating point
Register control #1 to peak efficiency operating point register control #N, the 1st time for completing channel circuit #1 to channel circuit #N are fixed
Position work;
(ii) central processing unit enters wait state until the discrete average value set A (m) of input signal mutates.
(iii) when A (m) mutates, central processing unit successively judges An (m) ..., and whether A1 (m) mutates;If
An (m) does not mutate, then continues directly to judge the process whether An-1 (m) mutates;If An (m) mutates, first
Restart peak efficiency operating point register control #N, is further continued for judging the process whether An-1 (m) mutates;And so on it is straight
To judging whether A1 (m) mutates;If A1 (m) does not mutate, it is directly entered wait state;If A1 (m) mutates,
Then first restart peak efficiency operating point register control #1, enters back into wait state;
(iv) (ii) to (iii) is repeated.
Further, in the step (iii), successively judge the sequence of mutation for An (m) to A1 (m);
Either: in the step (iii), successively judging the sequence of mutation for A1 (m) to An (m).
Technical concept of the invention are as follows: to ensure that single input and multi-output can present formula interface circuit in full-load range to institute
There are load combinations that can obtain to maximum probability highest or secondary high efficiency, proposes to use peak efficiency operating point in its channel circuit
Register control.In order to the switched inductors branch and single tube energy storage flow adaptation in channel circuit, peak efficiency operating point is fixed
Level controller positions sub-controller by operating point and monocycle sub-controller forms.According to the input and output signal of channel circuit,
Operating point positions the duty ratio of sub-controller adjustment single tube energy storage branch, and monocycle sub-controller adjusts the duty of switched inductors branch
Than finally realizing entire single input by way of run on highest or secondary efficiency operation point with enabling channel circuit maximum probability
Multi output can present the high efficiency of formula interface circuit.In peak efficiency operating point on the basis of register control, central processing is introduced
Device and bus can also derive a kind of peak efficiency work point-tracking method.
Beneficial effects of the present invention are mainly manifested in: peak efficiency operating point register control and method can further improve
Single input and multi-output can present the efficiency of formula interface circuit, especially can ensure that single input and multi-output in complex load systematic difference
Formula interface circuit, which can be presented, can obtain to maximum probability highest or secondary high efficiency to all load combinations in full-load range.
Embodiment 1
Referring to FIG. 1, FIG. 2 and FIG. 3, (J's takes the switched inductors branch #J that the channel circuit #J of the embodiment of the present invention 1 is used
Value 1 is made of to N) input capacitance Cij, inductance Lj, output capacitance Coj, N-MOS pipe Mj, and single tube energy storage branch #J is by diode
Dcj, capacitor Caj, coupling inductance Laj and Lbj, N-MOS pipe Maj, diode Dacj composition.One end of capacitor Cij simultaneously with it is straight
The one end for flowing the anode of bus, one end of coupling inductance Lbj and inductance Lj is connected, and the other end of inductance Lj is electric with output simultaneously
The one end for holding Coj and the one end for loading #J are connected, the other end of output capacitance Coj while the other end, N-MOS with load #J
The anode of the drain electrode of pipe Mj and diode Dcj are connected, the cathode of diode Dcj simultaneously with one end of capacitor Caj and couple
One end of inductance Laj is connected, and one end of the coupling inductance Laj and the other end of coupling inductance Lbj are Same Name of Ends relationship, coupling
The other end of inductance Laj is connected with the drain electrode of N-MOS pipe Maj, and the other end of the coupling inductance Laj is with coupling inductance Lbj's
The other end is different name end relationship, and the other end of the coupling inductance Lbj is connected with the cathode of diode Dacj, diode Dacj's
Anode simultaneously with the negative terminal of DC bus, the other end of capacitor Cij, the source electrode of N-MOS pipe Maj, capacitor Caj the other end, N-
The source electrode of metal-oxide-semiconductor is connected, the value 1 of j to n.
The peak efficiency operating point register control #J of the embodiment of the present invention 1 positions sub-controller #J and monocycle by operating point
Sub-controller #J composition.Operating point positions sub-controller #J and is locked by sampler #J, averager #J, minimum value determining device #J, data
Storage #J, data stack #J1, data stack #J2 composition.Monocycle sub-controller #J then uses incremental digital PID control device.Operating point is fixed
The workflow of seat controller #J and monocycle sub-controller #J are relatively independent.
The operating point positioning sub-controller #J of the embodiment of the present invention 1 is using the input current of channel circuit #J as input signal
Aj, and provide the control signal of single tube energy storage branch #J, i.e. the duty ratio Daj (m) of N-MOS pipe Maj.In peak efficiency operating point
After register control #J starts or restarts, operating point positioning sub-controller #J first carries out Scan orientation operation, then return and determine
Bit manipulation, shown in specific workflow such as step (1) to (11), wherein (1) to (7) belongs to Scan orientation operation, (8) extremely
(11) belong to recurrence positioning operation.
(1) after register control #J in peak efficiency operating point starts or restarts, operating point positioning sub-controller #J is introduced into
Scan orientation mode of operation, the duty cycle Tb=yTs of setting Scan orientation operation, Ts is switched inductors branch #J and single tube stores up
The duty cycle of energy branch #J, y are the integer greater than zero.
(2) further according to the DC bus-bar voltage of setting and loading range configuration data storehouse #J1, between being with Δ Da by one group
Every maximum duty cycle Daj_max to minimum duty cycle Daj_min duty cycle data, i.e. { Daj_max ..., Daj_min+ Δ
Da, Daj_min } it is loaded into data stack #J1.
(3) it is fixed to obtain Current Scan from data stack #J1 in order for operation Current Scan positioning duty cycle Tb (m)
The duty ratio Daj (m) of position duty cycle Tb (m) is simultaneously exported to single tube energy storage branch #J, controls the N- in single tube energy storage branch #J
Metal-oxide-semiconductor Maj;The value sequence of duty ratio Daj (m) is as follows: Daj (1)=Daj_min, Daj (2)=Daj_min+ Δ Da ...,
Daj (Y)=Daj_max, Y=1+ (Daj_max-Daj_min)/Δ Da, m value are 1 to Y.
(4) after channel circuit #J the operation is stable, obtained after input signal aj sampled device #J processing input signal from
Dissipate value aj (m).
(5) the discrete average value Aj of input signal is obtained after the averaged device #J processing of the discrete value aj (m) of input signal
(m)。
(6) the discrete average value Aj (m) of input signal through minimum value determining device #J judge, if judge Aj (m) for currently most
Small value, then it is current Daj (m) that minimum value determining device #J trigger data latch #J, which updates optimal duty ratio Daj_opt, i.e.,
Daj_opt=Daj (m);If judging Aj (m) not for current minimum value, data latches #J retains former optimal duty cycle data.
(7) if m=Y, show that entire Scan orientation operation is completed, will enter and return positioning operation state;Otherwise, under operation
One Scan orientation duty cycle Tb (m+1) enables m=m+1, repeats (3) to (7).
(8) enter the positioning operation state that returns, setting returns the duty cycle Tc=zTs of positioning operation, and Ts is switch electricity
Feel the duty cycle of branch #J and single tube energy storage branch #J, z is the integer greater than zero.
(9) according to the optimal duty ratio Daj_opt configuration data storehouse #J2 in data latches #J, by one group with Δ Db
For interval optimal duty ratio Daj_opt to the duty cycle data of maximum duty cycle Daj_max, i.e. { Daj_opt ..., Daj_
Max- Δ Db, Daj_max } it is loaded into data stack #J2.
(10) current recurrence positioning duty cycle Tc (m) of operation obtains current return from data stack #J2 in order and determines
The duty ratio Daj (m) of position duty cycle Tc (m) is simultaneously exported to single tube energy storage branch #J, controls the N- in single tube energy storage branch #J
Metal-oxide-semiconductor Maj;The value sequence of duty ratio Daj (m) is as follows: Daj (Y+1)=Daj_max, Daj (Y+2)=Daj_max- Δ
Db ..., Daj (Y+Z)=Daj_opt ..., Daj (∞)=Daj_opt, Z=1+ (Daj_max-Daj_opt)/Δ Db, m take
Value is Y+1 to ∞.
(11) next recurrence positioning duty cycle Tc (m+1) is run, m=m+1 is enabled, repeats (10) to (11) until highest
Efficiency work point location controller #J is restarted or channel circuit #J stops working.
The monocycle sub-controller #J of the embodiment of the present invention 1 using the output electric current of channel circuit #J as output signal bj, if
The duty cycle of order ring controller #J is Ta=xTs, and Ts is the work of switched inductors branch #J and single tube energy storage branch #J
Period, x are the integer greater than zero, current monocycle control duty cycle Ta (k) output duty cycle Dj (k) to switched inductors branch #
The value of N-MOS pipe Mj, k in J, control switch inductive branch #J are 1 to ∞.
When DC bus-bar voltage is constant, in the collective effect of operating point positioning sub-controller #J and monocycle sub-controller #J
Under, the discrete average value Bj (k) that output signal bj had both may be implemented in the channel circuit #J of the embodiment of the present invention 1 is equal to reference signal
Bref, and can with maximum probability realize highest or secondary high efficiency.Fig. 4 is the pass of the embodiment of the present invention 1 in the case of seven kinds of different loads
In 20 experimental results of channel circuit #1 efficiency, specific test condition is as follows: DC bus-bar voltage 24V, exports electric current
100mA loads as 1 to 7 white light LEDs.As can be seen from Figure 4, the peak efficiency operating point register control #1 in full-load range
Really highest or secondary high efficiency are obtained while channel circuit #1 maximum probability can be enabled, its performance is better than fixed duty cycle in terms of efficiency
The conventional controller of Da1 (m).(content of the conventional controller about fixed duty cycle Da1 (m) can be detailed on July 15th, 2016
It is published in the technical paper " efficient plug-in type LED array driving interface circuit " of " power supply journal " online.)