CN102981540B

CN102981540B - Power feedforward control method and related device

Info

Publication number: CN102981540B
Application number: CN201210437651.8A
Authority: CN
Inventors: 侯召政; 贾超
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Digital Power Technologies Co Ltd
Priority date: 2012-11-06
Filing date: 2012-11-06
Publication date: 2014-07-16
Anticipated expiration: 2032-11-06
Also published as: CN102981540A

Abstract

An embodiment of the invention discloses a power feedforward control method and a related device. The power feedforward control method can comprises sampling and obtaining a first output voltage sampling value at a first output voltage sampling position of a power supply, selecting a first feedforward gain coefficient to serve as an input voltage feedforward gain coefficient of the power supply if an absolute value of difference between the first output voltage sampling value and a reference output voltage value corresponding to the first output voltage sampling position is larger or equal to a first threshold, and selecting a second feedforward gain coefficient to serve as an input voltage feedforward gain coefficient if an absolute value of difference between the first output voltage sampling value and a reference output voltage value is smaller or equal to a second threshold. The scheme provided by the power feedforward control method and the related device conveniently meets the regulating and control requirements for multiple variation rates of input voltage.

Description

Power supply feed forward control method and relevant apparatus

Technical field

The present invention relates to electronic technology field, be specifically related to power supply feed forward control method and relevant apparatus.

Background technology

Conventional power supply is generally exported constant voltage.When running into I/O disturbance, be the output voltage of stabilized power source, need to suppress this part disturbance.Especially in input surge, input voltage falls and load dynamic change rate is higher occasion, for input disturbance, conventionally adopt feedforward to solve; For load disturbance, conventionally adopt modes such as increasing output capacitance, increase dynamic system bandwidth to reduce output impedance, or by nonlinear Control, reduce dynamic output impedance and solve.

The research of the digital feed forward control technique aspect of power supply is at present also less, and already present power supply digital feed forward scheme is mostly difficult to meet the regulation and control requirement under the various rate of change of input voltage.For example, existing digital feed forward scheme can meet the regulation and control requirement that input voltage changes at a slow speed, but feedforward effect when input voltage changes is fast poor.

Summary of the invention

The embodiment of the present invention provides a kind of power supply feed forward control method and relevant apparatus, to meeting the regulation and control requirement under the multiple rate of change of input voltage.

First aspect present invention provides a kind of power supply feed forward control method, comprising:

The first output voltage sampling location sampling at power supply obtains the first output voltage sampled value;

If the absolute value of the difference of the reference output voltage value that described the first output voltage sampled value is corresponding with described the first output voltage sampling location is more than or equal to first threshold, select the first feedforward gain coefficient as the input voltage feed forward gain coefficient of described power supply, wherein, described the first feedforward gain coefficient obtains based on the first input voltage sampled value, and described the first input voltage sampled value is to obtain with the first sampling rate sampling in the first input voltage sampling location of described power supply;

If the absolute value of the difference of described the first output voltage sampled value and described reference output voltage value is less than or equal to Second Threshold, select the second feedforward gain coefficient as the input voltage feed forward gain coefficient of described power supply; Wherein, described the second feedforward gain coefficient obtains based on the second input voltage sampled value, described the second input voltage sampled value obtains with the second sampling rate sampling in the second input voltage sampling location of described power supply, described first threshold is more than or equal to described Second Threshold, and described the first sampling rate is higher than described the second sampling rate.

In the possible embodiment of the first of first aspect, described the first feedforward gain coefficient is comprised based on the first input voltage sampled value: in default magnitude of voltage and feedforward gain coefficient corresponding relation record, find out the first feedforward gain coefficient corresponding to the first input voltage sampled value; Or, calculate reference input voltage value corresponding to described the first input voltage sampling location and described the first input voltage sampled value ratio, using described ratio as the first feedforward gain coefficient corresponding to described the first input voltage sampled value.

In conjunction with the possible embodiment of the first of first aspect or first aspect, in the possible embodiment of the second, described the second feedforward gain coefficient is comprised based on the second input voltage sampled value: calculate corresponding reference input voltage value and described the second input voltage sampled value ratio in the second input voltage sampling location, using described ratio as the second feedforward gain coefficient corresponding to described the second input voltage sampled value; Or, in default magnitude of voltage and feedforward gain coefficient corresponding relation record, find out the second feedforward gain coefficient corresponding to described the second input voltage sampled value.

The possible embodiment of the second in conjunction with the possible embodiment of the first of first aspect or first aspect or first aspect, in the third possible embodiment, described the first feedforward gain coefficient of described selection is as the input voltage feed forward gain coefficient of described power supply, comprise: if the absolute value of the difference of the input voltage feed forward gain coefficient of described the first feedforward gain coefficient and the current use of described power supply is more than or equal to the 3rd threshold value, to fix or on-fixed step-length steps to the first feedforward gain coefficient by the input voltage feed forward gain coefficient of the current use of described power supply.

The third possible embodiment in conjunction with the possible embodiment of the second of the possible embodiment of the first of first aspect or first aspect or first aspect or first aspect, in the 4th kind of possible embodiment, described the second feedforward gain coefficient of described selection is as the input voltage feed forward gain coefficient of described power supply, comprise: if the absolute value of the difference of the input voltage feed forward gain coefficient of described the second feedforward gain coefficient and the current use of described power supply is more than or equal to the 4th threshold value, to fix or on-fixed step-length steps to described the second feedforward gain coefficient by the input voltage feed forward gain coefficient of the current use of described power supply.

In conjunction with the third possible embodiment of the possible embodiment of the second of the possible embodiment of the first of first aspect or first aspect or first aspect or first aspect or the 4th kind of possible embodiment of first aspect, in the 5th kind of possible embodiment, described method also comprises: if select described the first feedforward gain coefficient as the input voltage feed forward gain coefficient of described power supply, described the first feedforward gain coefficient and feedback loop dutycycle are multiplied by mutually and produce the dutycycle that described power supply is used; If select described the second feedforward gain coefficient as the input voltage feed forward gain coefficient of described power supply, described the second feedforward gain coefficient and feedback loop dutycycle are multiplied by mutually and produce the dutycycle that described power supply is used.

In conjunction with the 4th kind of possible embodiment of the third possible embodiment of the possible embodiment of the second of the possible embodiment of the first of first aspect or first aspect or first aspect or first aspect or first aspect or the 5th kind of possible embodiment of first aspect, in the 6th kind of possible embodiment, the voltage input end that the first input voltage sampling location of described power supply is described power supply; And/or the second input voltage sampling location of described power supply voltage input end that is described power supply; And/or, the voltage output end that the first output voltage sampling location of described power supply is described power supply.

In conjunction with the 5th kind of possible embodiment of the 4th kind of possible embodiment of the third possible embodiment of the possible embodiment of the second of the possible embodiment of the first of first aspect or first aspect or first aspect or first aspect or first aspect or first aspect or the 6th kind of possible embodiment of first aspect, in the 7th kind of possible embodiment, by the first analog to digital converter, the first input voltage sampling location at described power supply obtains with the first sampling rate sampling described the first input voltage sampled value, by the second analog to digital converter, the second input voltage sampling location at described power supply obtains with the second sampling rate sampling described the second input voltage sampled value.

In conjunction with the 6th kind of possible embodiment of the 5th kind of possible embodiment of the 4th kind of possible embodiment of the third possible embodiment of the possible embodiment of the second of the possible embodiment of the first of first aspect or first aspect or first aspect or first aspect or first aspect or first aspect or first aspect or the 7th kind of possible embodiment of first aspect, in the 8th kind of possible embodiment, described the first analog to digital converter is error simulation digital quantizer; And/or described the second analog to digital converter is successive approximation simulation digital quantizer.

Second aspect present invention provides a kind of power supply feedforward control device, comprising:

The 3rd analog to digital converter, obtains the first output voltage sampled value for the first output voltage sampling location sampling at power supply;

Control module, if be used for the absolute value of the difference of described the first output voltage sampled value reference output voltage value corresponding with described the first output voltage sampling location, be more than or equal to first threshold, select the first feedforward gain coefficient as the input voltage feed forward gain coefficient of described power supply; If the absolute value of the difference of described the first output voltage sampled value and described reference output voltage value is less than or equal to Second Threshold, select the second feedforward gain coefficient as the input voltage feed forward gain coefficient of described power supply; Wherein, described the first feedforward gain coefficient obtains based on the first input voltage sampled value, and described the first input voltage sampled value is to obtain with the first sampling rate sampling in the first input voltage sampling location of described power supply; Described the second feedforward gain coefficient obtains based on the second input voltage sampled value, described the second input voltage sampled value is to obtain with the second sampling rate sampling in the second input voltage sampling location of described power supply, described the first sampling rate is higher than described the second sampling rate, and described first threshold is more than or equal to described Second Threshold.

In the possible embodiment of the first of first aspect, described device also comprises: the first analog to digital converter, obtains described the first input voltage sampled value for the first input voltage sampling location at described power supply with the first sampling rate sampling; The second analog to digital converter, obtains described the second input voltage sampled value for the second input voltage sampling location at described power supply with the second sampling rate sampling.

In conjunction with the possible embodiment of the first of first aspect or first aspect, in the possible embodiment of the second, described the first analog to digital converter is error simulation digital quantizer; And/or described the second analog to digital converter is successive approximation simulation digital quantizer; And/or described the 3rd analog to digital converter is error simulation digital quantizer or successive approximation simulation digital quantizer.

In conjunction with the possible embodiment of the second of the possible embodiment of the first of first aspect or first aspect or first aspect, in the third possible embodiment, described control module comprises:

First controls subelement, if be used for the absolute value of the difference of described the first output voltage sampled value reference output voltage value corresponding with described the first output voltage sampling location, be more than or equal to first threshold, and the difference of the input voltage feed forward gain coefficient of described the first feedforward gain coefficient and the current use of described power supply is more than or equal to the 3rd threshold value, to fix or on-fixed step-length steps to the first feedforward gain coefficient by the input voltage feed forward gain coefficient of the current use of described power supply; Wherein, described the first feedforward gain coefficient obtains based on the first input voltage sampled value, and described the first input voltage sampled value is to obtain with the first sampling rate sampling in the first input voltage sampling location of described power supply;

Second controls subelement, if be used for the absolute value of the difference of described the first output voltage sampled value and described reference output voltage value, be less than or equal to Second Threshold, and if the absolute value of the difference of the input voltage feed forward gain coefficient of described the second feedforward gain coefficient and the current use of described power supply is greater than or equal to the 4th threshold value, to fix or on-fixed step-length steps to described the second feedforward gain coefficient by the input voltage feed forward gain coefficient of the current use of described power supply; Wherein, described the second feedforward gain coefficient obtains based on the second input voltage sampled value, described the second input voltage sampled value is to obtain with the second sampling rate sampling in the second input voltage sampling location of described power supply, and described first threshold is more than or equal to described Second Threshold.

The third possible embodiment in conjunction with the possible embodiment of the second of the possible embodiment of the first of first aspect or first aspect or first aspect or first aspect, in the 4th kind of possible embodiment, described power supply feedforward control device also comprises:

Dutycycle acquiring unit, if select described the first feedforward gain coefficient as the input voltage feed forward gain coefficient of described power supply for described control module, described the first feedforward gain coefficient and feedback loop dutycycle are multiplied by mutually and produce the dutycycle that described power supply is used; If described control module selects described the second feedforward gain coefficient as the input voltage feed forward gain coefficient of described power supply, described the second feedforward gain coefficient and feedback loop dutycycle are multiplied by mutually and produce the dutycycle that described power supply is used.

In conjunction with the third possible embodiment of the possible embodiment of the second of the possible embodiment of the first of first aspect or first aspect or first aspect or first aspect or the 4th kind of possible embodiment of first aspect, in the 5th kind of possible embodiment, the voltage input end that the first input voltage sampling location of described power supply is described power supply; And/or, the voltage input end that the second input voltage sampling location of described power supply is described power supply; And/or, the voltage output end that the first output voltage sampling location of described power supply is described power supply.

Third aspect present invention provides a kind of supply unit, comprising:

Loop of power circuit and the power supply feedforward control device being connected with described loop of power circuit; Wherein, described power supply feedforward control device is the power supply feedforward control device as described in above-described embodiment.

Therefore the first output voltage sampling location sampling at power supply in the embodiment of the present invention obtains the first output voltage sampled value; If the absolute value of the difference of the reference output voltage value that the first output voltage sampled value is corresponding with the first output voltage sampling location is more than or equal to first threshold, select the first feedforward gain coefficient of sampling and obtaining the first input voltage sampled value and obtain with the first sampling rate, as the input voltage feed forward gain coefficient of power supply; If the absolute value of the difference of the reference output voltage value that the first output voltage sampled value is corresponding with the first output voltage sampling location is less than or equal to Second Threshold, select the second feedforward gain coefficient of sampling and obtaining the second input voltage sampled value and obtain with the second sampling rate, as the input voltage feed forward gain coefficient of power supply.Because the first sampling rate is higher than the second sampling rate, therefore the feedforward gain coefficient of selecting the sampled value based on different sampling rate analog to digital converters to obtain according to the situation of change of output voltage, be conducive to better meet the regulation and control requirement under the multiple rate of change of input voltage the voltage fluctuation while being conducive to effectively suppress input voltage variation; And adopt less hardware costs just can reach and suppress output disturbance effect, actual effect is obviously with a wide range of applications.

Accompanying drawing explanation

In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.

Fig. 1 is the schematic flow sheet of a kind of power supply feed forward control method of providing of the embodiment of the present invention;

Fig. 2 is the schematic flow sheet of the another kind of power supply feed forward control method that provides of the embodiment of the present invention;

Fig. 3 is the schematic flow sheet of another power supply feed forward control method of providing of the embodiment of the present invention;

Fig. 4-a is the schematic diagram of a kind of power supply feedforward control device of providing of the embodiment of the present invention;

Fig. 4-b is the schematic diagram of the another kind of power supply feedforward control device that provides of the embodiment of the present invention;

Fig. 4-c is the schematic diagram of the another kind of power supply feedforward control device that provides of the embodiment of the present invention;

Fig. 4-d is the schematic diagram of the another kind of power supply feedforward control device that provides of the embodiment of the present invention;

Fig. 4-e is the schematic diagram of the another kind of power supply feedforward control device that provides of the embodiment of the present invention;

Fig. 4-f is the schematic diagram of the another kind of power supply feedforward control device that provides of the embodiment of the present invention;

Fig. 5-a is the schematic diagram of another power supply feedforward control device of providing of the embodiment of the present invention;

Fig. 5-b is the schematic diagram of another power supply feedforward control device of providing of the embodiment of the present invention;

Fig. 6 is the schematic flow sheet of a kind of supply unit of providing of the embodiment of the present invention.

Embodiment

In order to make those skilled in the art person understand better the present invention program, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the embodiment of a part of the present invention, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, should belong to the scope of protection of the invention.

Below be elaborated respectively.

Term " first " in instructions of the present invention and claims and above-mentioned accompanying drawing, " second ", " the 3rd " " 4th " etc. (if existence) are for distinguishing similar object, and needn't be for describing specific order or precedence.The data that should be appreciated that such use suitably can exchanged in situation, so as embodiments of the invention described herein for example can with except diagram here or describe those order enforcement.In addition, term " comprises " and " having " and their any distortion, intention is to cover not exclusive comprising, for example, those steps or unit that the process that has comprised series of steps or unit, method, system, product or equipment are not necessarily limited to clearly list, but can comprise clearly do not list or for these processes, method, product or equipment intrinsic other step or unit.

An embodiment of power supply feed forward control method of the present invention, method can comprise: the first output voltage sampling location sampling at power supply obtains the first output voltage sampled value; If the absolute value of the difference of the reference output voltage value that the first output voltage sampled value is corresponding with the first output voltage sampling location is greater than or equal to first threshold, select the first feedforward gain coefficient as the input voltage feed forward gain coefficient of power supply, wherein, the first feedforward gain coefficient obtains based on the first input voltage sampled value, and the first input voltage sampled value is to obtain with the first sampling rate sampling in the first input voltage sampling location of power supply; If the absolute value of the difference of the first output voltage sampled value and reference output voltage value is less than or equal to Second Threshold, select the second feedforward gain coefficient as the input voltage feed forward gain coefficient of power supply; Wherein, the second feedforward gain coefficient obtains based on the second input voltage sampled value, the second input voltage sampled value is to obtain with the second sampling rate sampling in the second input voltage sampling location of power supply, and first threshold is more than or equal to Second Threshold, and the first sampling rate is higher than the second sampling rate.

Refer to Fig. 1, Fig. 1 is the schematic flow sheet of a kind of power supply feed forward control method of providing of embodiments of the invention, and a kind of power supply feed forward control method can comprise following content:

101, the first output voltage sampling location sampling at power supply obtains the first output voltage sampled value.

For example, can utilize the 3rd analog to digital converter to obtain the first output voltage sampled value in the first output voltage sampling location sampling of power supply.

If the absolute value of the difference of the reference output voltage value that 102 first output voltage sampled values are corresponding with the first output voltage sampling location is more than or equal to first threshold, select the first feedforward gain coefficient as the input voltage feed forward gain coefficient of power supply, wherein, the first feedforward gain coefficient obtains based on the first input voltage sampled value, and the first input voltage sampled value is to obtain with the first sampling rate sampling in the first input voltage sampling location of power supply.

For example the first input voltage sampled value can be obtained with the first sampling rate sampling location sampling by the first input voltage at power supply by the first analog to digital converter.

If the absolute value of the difference of 103 first output voltage sampled values and reference output voltage value is less than or equal to Second Threshold, select the second feedforward gain coefficient as the input voltage feed forward gain coefficient of power supply; Wherein, the second feedforward gain coefficient obtains based on the second input voltage sampled value, the second input voltage sampled value is to obtain with the second sampling rate sampling in the second input voltage sampling location of power supply, and first threshold is more than or equal to Second Threshold, and the first sampling rate is higher than the second sampling rate.

For example, the second input voltage sampled value can be obtained with the second sampling rate sampling the second input voltage sampling location at power supply by the second analog to digital converter.Wherein, the 3rd analog to digital converter and the first analog to digital converter or the second analog to digital converter are identical or different, and the sampling rate of the first analog to digital converter is higher than the sampling rate of the second analog to digital converter.

Wherein, the sampling rate of the first analog to digital converter is higher than the sampling rate of the second analog to digital converter.Further, the sampling precision of the first analog to digital converter can higher than, be equal to or less than the sampling precision of the second analog to digital converter.For instance, the first analog to digital converter for example can be error simulation digital quantizer (EADC, Error Analog-Digital converter), and EADC is a kind of quick low precision analog-digital converter; The second analog to digital converter is successive approximation simulation digital quantizer (SARADC, Successive Approximation Register Analog-Digital converter), and wherein, SARADC is a kind of digital quantizer of high-precision analog at a slow speed.Certainly, the first analog to digital converter can be also other different analog to digital converter of sampling rate with the second analog to digital converter.The 3rd analog to digital converter can be the analog-digital converter of EADC or SARADC or other type.

In some embodiments of the invention, if need, use the second input voltage sampled value, any time that can be before using the second input voltage sampled value, the second analog to digital converter obtains this second input voltage sampled value in the second input voltage sampling location sampling of power supply.In like manner, if need to use the first input voltage sampled value, any time that can be before using the first input voltage sampled value, the first analog to digital converter obtains this first input voltage sampled value in the first input voltage sampling location sampling of power supply.

Wherein, reference input voltage value/the first input voltage sampled value ± e1 that the first feedforward gain coefficient=the first input voltage sampling location is corresponding, e1 is permissible error.In some embodiments of the invention, the mode that obtains the first feedforward gain coefficient based on the first input voltage sampled value can be diversified, for example calculate reference input voltage value corresponding to the first input voltage sampling location and the first input voltage sampled value ratio, using this ratio as the first feedforward gain coefficient corresponding to the first input voltage sampled value, or, can be in default magnitude of voltage and feedforward gain coefficient corresponding relation record, find out the first feedforward gain coefficient corresponding to the first input voltage sampled value, wherein, for example can record default magnitude of voltage and feedforward gain coefficient corresponding relation by look-up table, especially, if do not have the magnitude of voltage of record in any one record to equal the first input voltage sampled value in look-up table, for example also can be by the feedforward gain coefficient recording in institute's recording voltage value in look-up table and the immediate record of the first input voltage sampled value, as the first feedforward gain coefficient corresponding to the first input voltage sampled value.Wherein, utilize the first feedforward gain coefficient getting can offset to a certain extent input and change the output pulsation causing.For example, the input voltage of supposing power input is 48V from the reference input voltage of 48V(hypothesis power input) change to 60V, the first feedforward gain coefficient for example can be changed to 0.8 from 1, to offset input, changes the output pulsation causing.

Wherein, reference input voltage value/the second input voltage sampled value ± e2 that the second feedforward gain coefficient=the second input voltage sampling location is corresponding, e2 is permissible error.In some embodiments of the invention, the mode that obtains the second feedforward gain coefficient based on the second input voltage sampled value can be diversified, for example, can calculate reference input voltage value corresponding to the second input voltage sampling location and the second input voltage sampled value ratio, using this ratio as the first feedforward gain coefficient corresponding to the second input voltage sampled value, or can be in default magnitude of voltage and feedforward gain coefficient corresponding relation record, find out the second feedforward gain coefficient corresponding to the second input voltage sampled value, wherein, for example can record default magnitude of voltage and feedforward gain coefficient corresponding relation by look-up table, especially, if do not have the magnitude of voltage of record in any one record to equal the second input voltage sampled value in look-up table, feedforward gain coefficient in the immediate record of the magnitude of voltage that for example also look-up table can be recorded and the second input voltage sampled value, as the second feedforward gain coefficient corresponding to the second input voltage sampled value.Wherein, utilize the second feedforward gain coefficient getting can offset to a certain extent input and change the output pulsation causing.For example, the input voltage of supposing power input is 48V from the reference input voltage of 48V(hypothesis power input) change to 60V, the second feedforward gain coefficient for example can be changed to 0.8 from 1, to offset input, changes the output pulsation causing.

In some embodiments of the invention, if the absolute value of the difference of the reference output voltage value that the first output voltage sampled value is corresponding with the first output voltage sampling location is more than or equal to first threshold, if and the absolute value of the difference of the input voltage feed forward gain coefficient of the first feedforward gain coefficient and the current use of power supply is more than or equal to the 3rd threshold value (wherein, the 3rd threshold value is specifically set according to actual needs, the span of the 3rd threshold value is for example between 1 ~ 10 times of minimum step, the 3rd threshold value is for example got minimum step, certainly its value also can be the value that other can be satisfied the demand), can fixed step size (as 1 ~ 10 of minimum step times or other multiple) or on-fixed step-length the input voltage feed forward gain coefficient of the current use of this power supply is stepped to the first feedforward gain coefficient, wherein the 3rd threshold value is greater than or equal to zero.The value of first threshold can specifically be set according to specific needs, if the absolute value of the difference of the reference output voltage value that the first output voltage sampled value is corresponding with the first output voltage sampling location is more than or equal to first threshold, can think that output voltage changes greatly, wherein, change in voltage slope corresponding to first threshold for example can be greater than 100v/ms or other value.

In some embodiments of the invention, if the absolute value of the difference of the reference output voltage value that the first output voltage sampled value is corresponding with the first output voltage sampling location is more than or equal to first threshold, if and the absolute value of the difference of the input voltage feed forward gain coefficient of the second feedforward gain coefficient and the current use of power supply is more than or equal to the 4th threshold value (wherein, the 4th threshold value is specifically set according to actual needs, the span of the 4th threshold value is for example between 1 ~ 10 times of minimum step, the 4th threshold value is for example got minimum step, certainly its value also can be the value that other can be satisfied the demand), can fix (as 1 ~ 10 of minimum step times or other multiple) or on-fixed step-length the input voltage feed forward gain coefficient of the current use of this power supply is stepped to the second feedforward gain coefficient, wherein, the 4th threshold value is more than or equal to zero, first threshold is more than or equal to Second Threshold.Wherein, the value of Second Threshold can specifically be set according to specific needs, when the absolute value of the difference of the first output voltage sampled value reference output voltage value corresponding with the first output voltage sampling location is less than or equal to Second Threshold, can think that output voltage changes less, wherein, the change in voltage slope that Second Threshold is corresponding for example can be less than 100v/ms or other value.

In some embodiments of the invention, the first input voltage sampling location and the second input voltage sampling location can be identical or different, and the first output voltage sampling location can be identical or different from the first input voltage sampling location.For obtaining good sample effect, the voltage of the first input voltage sampling location and/or the second input voltage sampling location, and between the voltage of the voltage input end of power supply, postpone preferably 1 ~ 2 power switch cycle, to be advisable.The voltage of the first input voltage sampling location and the second input voltage sampling location, and the magnitude relationship between the voltage of the voltage input end of power supply is determined, to a certain extent, the input voltage sampled value that can utilize the sampling of the first input voltage sampling location or the second input voltage sampling location to obtain, extrapolates the voltage sample value of the voltage input end of power supply.In like manner, the voltage of the voltage output end of power supply, and the delay between the voltage of the first output voltage sampling location is preferably advisable 1 ~ 2 power switch cycle, the voltage of the first output voltage sampling location, and the magnitude relationship between the voltage of the voltage output end of power supply is determined, to a certain extent, the output voltage sampled value that can utilize the first output voltage sampling location sampling to obtain, extrapolates the voltage sample value of the voltage output end of power supply.For instance, the first input voltage sampling location can be the voltage input end of power supply.The second input voltage sampling location can be the voltage input end of power supply.The voltage output end that the first output voltage sampling location is power supply.

In some embodiments of the invention, if select the first feedforward gain coefficient as the input voltage feed forward gain coefficient of power supply, also can further the first feedforward gain coefficient and feedback loop dutycycle be multiplied by mutually and produce the dutycycle that this power supply is used; If select the second feedforward gain coefficient as the input voltage feed forward gain coefficient of power supply, also can further the second feedforward gain coefficient and feedback loop dutycycle be multiplied by mutually and produce the dutycycle that power supply is used.Wherein, the acquisition pattern of feedback loop dutycycle can be diversified, for example, the difference of the reference output voltage of the output voltage sampled value obtaining in power output end sampling and power output end can be carried out to loop calculating, obtains feedback loop dutycycle.Or, also can sample to obtain potential difference sampled value to the potential difference of the output voltage of power output end and corresponding reference output voltage, this potential difference sampled value is carried out to loop and calculate feedback loop dutycycle.So, because the dutycycle providing for power supply has considered the feedforward gain coefficient of current selection, so be conducive to provide more rational dutycycle for power supply.

Therefore the first output voltage sampling location sampling at power supply in the present embodiment obtains the first output voltage sampled value; If the absolute value of the difference of the reference output voltage value that the first output voltage sampled value is corresponding with the first output voltage sampling location is more than or equal to first threshold, select the first feedforward gain coefficient of sampling and obtaining the first input voltage sampled value and obtain with the first sampling rate, as the input voltage feed forward gain coefficient of power supply; If the absolute value of the difference of the reference output voltage value that the first output voltage sampled value is corresponding with the first output voltage sampling location is less than or equal to Second Threshold, select the second feedforward gain coefficient of sampling and obtaining the second input voltage sampled value and obtain with the second sampling rate, as the input voltage feed forward gain coefficient of power supply.Because the first sampling rate is higher than the second sampling rate, therefore according to the situation of change of output voltage, the feedforward gain coefficient of selecting the sampled value based on different sampling rate analog to digital converters to obtain, be conducive to better meet the regulation and control requirement under the multiple rate of change of input voltage the voltage fluctuation while being conducive to effectively suppress input voltage variation; And adopt less hardware costs just can reach and suppress output disturbance effect, actual effect is obviously with a wide range of applications.

For ease of better understanding and implement the such scheme of the embodiment of the present invention, below by Fig. 2 and Fig. 3 two kinds of possible embodiments for example.

Refer to Fig. 2, Fig. 2 is the schematic flow sheet of the another kind of power supply feed forward control method that provides of embodiments of the invention, and another kind of power supply feed forward control method can comprise following content:

201, utilize the first analog to digital converter to obtain the first input voltage sampled value in the first input voltage sampling location sampling of power supply.

202, obtain the first feedforward gain coefficient corresponding to the first input voltage sampled value that the first analog to digital converter sampling obtains.

203, utilize the second analog to digital converter to obtain the second input voltage sampled value in the second input voltage sampling location sampling of power supply, wherein, the sampling rate of the first analog to digital converter is higher than the sampling rate of the second analog to digital converter.

Wherein, between step 203 and step 201 or step 202, there is no inevitable sequencing.

204, obtain the second feedforward gain coefficient corresponding to the second input voltage sampled value that the second analog to digital converter sampling obtains.

Wherein, between step 204 and step 201 or step 202, there is no inevitable sequencing.

205, utilize the 3rd analog to digital converter to obtain the first output voltage sampled value in the first output voltage sampling location sampling of power supply.

Be appreciated that the sequencing that there is no certainty between step 205 and step 201 ~ step 204.

If the absolute value of the difference of the reference output voltage value that 206 first output voltage sampled values are corresponding with the first output voltage sampling location is more than or equal to first threshold, select the first feedforward gain coefficient as the input voltage feed forward gain coefficient of power supply; If the absolute value of the difference of the first output voltage sampled value and reference output voltage value is less than Second Threshold, select the second feedforward gain coefficient as the input voltage feed forward gain coefficient of power supply; Wherein, first threshold is more than or equal to Second Threshold, and the 3rd analog to digital converter and the first analog to digital converter or the second analog to digital converter are identical or different.

Refer to Fig. 3, Fig. 3 is the schematic flow sheet of another power supply feed forward control method of providing of the embodiment of the present invention, and another power supply feed forward control method can comprise following content:

301, utilize the 3rd analog to digital converter to obtain the first output voltage sampled value in the first output voltage sampling location sampling of power supply.

If the absolute value of the difference of the reference output voltage value that 302 first output voltage sampled values are corresponding with the first output voltage sampling location is more than or equal to first threshold, utilize the first analog to digital converter to obtain the first input voltage sampled value in the first input voltage sampling location sampling of power supply.

303, obtain the first feedforward gain coefficient corresponding to the first input voltage sampled value that the first analog to digital converter sampling obtains.

304, select the first feedforward gain coefficient as the input voltage feed forward gain coefficient of power supply.

If the absolute value of the difference of the reference output voltage value that 305 first output voltage sampled values are corresponding with the first output voltage sampling location is less than or equal to Second Threshold, utilize the second analog to digital converter to obtain the second input voltage sampled value in the second input voltage sampling location sampling of power supply, wherein, the sampling rate of the first analog to digital converter is higher than the sampling rate of the second analog to digital converter.

306, obtain the second feedforward gain coefficient corresponding to the second input voltage sampled value that the second analog to digital converter sampling obtains.

307, select the second feedforward gain coefficient as the input voltage feed forward gain coefficient of power supply.

Wherein, by Fig. 2 and Fig. 3 two kinds of possible embodiments for example, certainly also have other possible implementation above, give an example no longer one by one herein.

For ease of better implementing embodiment of the present invention such scheme, be also provided for implementing the relevant apparatus of such scheme below.

Referring to Fig. 4-a, a kind of power supply feedforward control device 400 that the embodiment of the present invention provides, can comprise:

The 3rd analog to digital converter 430 and control module 440.

Wherein, the 3rd analog to digital converter 430, obtains the first output voltage sampled value for the first output voltage sampling location sampling at power supply.

Control module 440, if the absolute value of the difference of the reference output voltage value that the first output voltage sampled value obtaining for the 3rd analog to digital converter 430 samplings is corresponding with the first output voltage sampling location is more than or equal to first threshold, select the first feedforward gain coefficient as the input voltage feed forward gain coefficient of power supply; If the absolute value of the difference of the first output voltage sampled value and reference output voltage value is less than or equal to Second Threshold, select the second feedforward gain coefficient as the input voltage feed forward gain coefficient of power supply; Wherein, the first feedforward gain coefficient obtains based on the first input voltage sampled value, and the first input voltage sampled value is to obtain with the first sampling rate sampling in the first input voltage sampling location of power supply; The second feedforward gain coefficient obtains based on the second input voltage sampled value, the second input voltage sampled value is to obtain with the second sampling rate sampling in the second input voltage sampling location of power supply, first threshold is more than or equal to Second Threshold, and the first sampling rate is greater than the second sampling rate.

Referring to Fig. 4-b, in some embodiments of the invention, power supply feedforward control device 400 also can comprise:

The first analog to digital converter 410 and the second analog to digital converter 420.

Wherein, the first analog to digital converter 410, obtains the first input voltage sampled value for the first input voltage sampling location at power supply with the first sampling rate sampling;

The second analog to digital converter 420, obtains the second input voltage sampled value for the second input voltage sampling location at power supply with the second sampling rate sampling.

Wherein, the 3rd analog to digital converter 430 and the first analog to digital converter 410 or the second analog to digital converter 420 are identical or different.

Wherein, the sampling rate of the first analog to digital converter 410 is higher than the sampling rate of the second analog to digital converter 420, the sampling precision of the first analog to digital converter 410 can higher than, be equal to or less than the sampling precision of the second analog to digital converter 420.For instance, the second analog to digital converter 420 is SARADC, and the first analog to digital converter 410 for example can be EADC.Certainly, the first analog to digital converter 410 can be also other different analog to digital converter of sampling rate with the second analog to digital converter 420.The 3rd analog to digital converter 430 can be the analog-digital converter of EADC or SARADC or other type.

In some embodiments of the invention, control module 440 can be in several ways, based on the first input voltage sampled value, obtain the first feedforward gain coefficient, for example control module 440 can calculate reference input voltage value corresponding to the first input voltage sampling location and the first input voltage sampled value ratio, using this ratio as the first feedforward gain coefficient corresponding to the first input voltage sampled value, or, control module 440 can be in default magnitude of voltage and feedforward gain coefficient corresponding relation record, find out the first feedforward gain coefficient corresponding to the first input voltage sampled value, wherein, for example can record default magnitude of voltage and feedforward gain coefficient corresponding relation by look-up table, especially, if do not have the magnitude of voltage of record in any one record to equal the first input voltage sampled value in look-up table, for example also can be by the feedforward gain coefficient recording in institute's recording voltage value in look-up table and the immediate record of the first input voltage sampled value, as the first feedforward gain coefficient corresponding to the first input voltage sampled value.Wherein, utilize the first feedforward gain coefficient getting can offset to a certain extent input and change the output pulsation causing.For example, the input voltage of supposing power input is 48V from the reference input voltage of 48V(hypothesis power input) change to 60V, the first feedforward gain coefficient for example can be changed to 0.8 from 1, to offset input, changes the output pulsation causing.

In some embodiments of the invention, control module 440 can be in several ways, based on the second input voltage sampled value, obtain the mode of the second feedforward gain coefficient, for example, control module 440 can calculate reference input voltage value corresponding to the second input voltage sampling location and the second input voltage sampled value ratio, using this ratio as the first feedforward gain coefficient corresponding to the second input voltage sampled value, or, control module 440 can be in default magnitude of voltage and feedforward gain coefficient corresponding relation record, find out the second feedforward gain coefficient corresponding to the second input voltage sampled value, wherein, for example can record default magnitude of voltage and feedforward gain coefficient corresponding relation by look-up table, especially, if do not have the magnitude of voltage of record in any one record to equal the second input voltage sampled value in look-up table, feedforward gain coefficient in the immediate record of the magnitude of voltage that for example also look-up table can be recorded and the second input voltage sampled value, as the second feedforward gain coefficient corresponding to the second input voltage sampled value.Wherein, utilize the second feedforward gain coefficient getting can offset to a certain extent input and change the output pulsation causing.For example, the input voltage of supposing power input is 48V from the reference input voltage of 48V(hypothesis power input) change to 60V, the second feedforward gain coefficient for example can be changed to 0.8 from 1, to offset input, changes the output pulsation causing.

Referring to Fig. 4-c, in some embodiments of the invention, control module 440 can comprise: first controls subelement 441 and second controls subelement 442.

Wherein, first controls subelement 441, if the absolute value of the difference of the reference output voltage value that the first output voltage sampled value obtaining for the 3rd analog to digital converter 430 samplings is corresponding with the first output voltage sampling location is greater than or equal to first threshold, and the difference of the input voltage feed forward gain coefficient of the first feedforward gain coefficient and the current use of power supply is more than or equal to the 3rd threshold value (wherein, the 3rd threshold value is specifically set according to actual needs, the span of the 3rd threshold value is for example between 1 ~ 10 times of minimum step, the 3rd threshold value is for example got minimum step, certainly its value also can be the value that other can be satisfied the demand), can fix (as 1 ~ 10 of minimum step times or other multiple) or on-fixed step-length the input voltage feed forward gain coefficient of the current use of power supply is stepped to the first feedforward gain coefficient, wherein, the first feedforward gain coefficient obtains based on the first input voltage sampled value, and the first input voltage sampled value is to obtain with the first sampling rate sampling in the first input voltage sampling location of power supply.

Second controls subelement 442, if the absolute value of the difference of the reference output voltage value that the first output voltage sampled value obtaining for the 3rd analog to digital converter 430 samplings is corresponding with the first output voltage sampling location is less than or equal to Second Threshold, if and the absolute value of the difference of the input voltage feed forward gain coefficient of the second feedforward gain coefficient and the current use of power supply is greater than or equal to the 4th threshold value (wherein, the 4th threshold value is specifically set according to actual needs, the span of the 4th threshold value is for example between 1 ~ 10 times of minimum step, the 4th threshold value is for example got minimum step, certainly its value also can be the value that other can be satisfied the demand), can fix (for example 1 ~ 10 of minimum step times or other multiple) or on-fixed step-length the input voltage feed forward gain coefficient of the current use of power supply is stepped to the second feedforward gain coefficient, wherein, the second feedforward gain coefficient obtains based on the second input voltage sampled value, and the second input voltage sampled value is to obtain with the second sampling rate sampling in the second input voltage sampling location of power supply, and first threshold is more than or equal to Second Threshold.

Referring to Fig. 4-d, in some embodiments of the invention, control module 440 also can comprise feedforward gain register 443, wherein, feedforward gain register 443 controls for storing the first feedforward gain coefficient or the storage second of the first control subelement 441 selections the second feedforward gain coefficient that subelement 442 is selected.

Referring to Fig. 4-e, in some embodiments of the invention, power supply feedforward control device 400 also can further comprise: dutycycle acquiring unit 450, if select the first feedforward gain coefficient as the input voltage feed forward gain coefficient of power supply for control module 440, the first feedforward gain coefficient and feedback loop dutycycle are multiplied by mutually and produce the dutycycle that power supply is used; If control module 440 selects the second feedforward gain coefficient as the input voltage feed forward gain coefficient of power supply, the second feedforward gain coefficient and feedback loop dutycycle are multiplied by mutually and produce the dutycycle that power supply is used.

Referring to Fig. 4-f, in some embodiments of the invention, power supply feedforward control device 400 also can further comprise: loop computing unit 460, and for calculating feedback loop dutycycle.Wherein, the mode that loop computing unit 460 calculates feedback loop dutycycle can be diversified, for example loop computing unit 460 can carry out loop calculating by the difference of the reference output voltage of the output voltage sampled value obtaining in power output end sampling and power output end, obtains feedback loop dutycycle.Or, also can sample to obtain potential difference sampled value to the potential difference of the output voltage of power output end and corresponding reference output voltage, loop computing unit 460 carries out loop by this potential difference sampled value and calculates feedback loop dutycycle.Or the difference of the reference output voltage value that the first output voltage sampled value that loop computing unit 460 can obtain the 3rd analog to digital converter 430 sampling is corresponding with the first output voltage sampling location, carries out loop and calculates feedback loop dutycycle.

Be understandable that, the function of each functional module of the power supply feedforward control device 400 of the present embodiment can be according to the method specific implementation in said method embodiment, and its specific implementation process can, with reference to the associated description of said method embodiment, repeat no more herein.

Therefore power supply feedforward control device 400 comprises the 3rd analog to digital converter and control module in the present embodiment, utilize the 3rd analog to digital converter to obtain the first output voltage sampled value in the first output voltage sampling location sampling of power supply; If the absolute value of the difference of the reference output voltage value that the first output voltage sampled value is corresponding with the first output voltage sampling location is more than or equal to first threshold, select the first feedforward gain coefficient of sampling and obtaining the first input voltage sampled value and obtain with the first sampling rate, as the input voltage feed forward gain coefficient of power supply; If the absolute value of the difference of the reference output voltage value that the first output voltage sampled value is corresponding with the first output voltage sampling location is less than or equal to Second Threshold, select the second feedforward gain coefficient of sampling and obtaining the second input voltage sampled value and obtain with the first sampling rate, as the input voltage feed forward gain coefficient of power supply.Because the first sampling rate is higher than the second sampling rate, therefore according to the situation of change of output voltage, the feedforward gain coefficient of selecting the sampled value based on different sampling rate analog to digital converters to obtain, be conducive to better meet the regulation and control requirement under the multiple rate of change of input voltage the voltage fluctuation while being conducive to effectively suppress input voltage variation; And adopt less hardware costs just can reach and suppress output disturbance effect, actual effect is obviously with a wide range of applications.

Referring to Fig. 5-a, a kind of power supply feedforward control device 500 that the embodiment of the present invention provides, can comprise: the 3rd analog to digital converter 530, storer 540, processor 550 and output unit 560.Wherein, in figure, with each parts, by bus, be connected to example, each parts also can connect by communication mode by other certainly.

Wherein, the 3rd analog to digital converter 530, obtains the first output voltage sampled value for the first output voltage sampling location sampling at power supply, and wherein, the 3rd analog to digital converter 530 and the first analog to digital converter 510 or the second analog to digital converter 520 are identical or different.

Processor 550 is carried out following steps: if the absolute value of the difference of the first output voltage sampled value that the 3rd analog to digital converter 530 samplings obtain reference output voltage value corresponding with the first output voltage sampling location is more than or equal to first threshold, select the first feedforward gain coefficient as the input voltage feed forward gain coefficient of power supply; If the absolute value of the difference of the first output voltage sampled value and reference output voltage value is less than or equal to Second Threshold, select the second feedforward gain coefficient as the input voltage feed forward gain coefficient of power supply; Wherein, the first feedforward gain coefficient obtains based on the first input voltage sampled value, and the first input voltage sampled value is to obtain with the first sampling rate sampling in the first input voltage sampling location of power supply; The second feedforward gain coefficient obtains based on the second input voltage sampled value, and the second input voltage sampled value is to obtain with the second sampling rate sampling in the second input voltage sampling location of power supply, and first threshold is more than or equal to Second Threshold.

Referring to Fig. 5-b, in some embodiments of the invention, power supply feedforward control device 500 also can comprise:

The first analog to digital converter 510 and the second analog to digital converter 520.

Wherein, the first analog to digital converter 510, obtains the first input voltage sampled value for the first input voltage sampling location at power supply with the first sampling rate sampling;

The second analog to digital converter 520, obtains the second input voltage sampled value for the second input voltage sampling location at power supply with the second sampling rate sampling.

Wherein, the 3rd analog to digital converter 530 and the first analog to digital converter 510 or the second analog to digital converter 520 are identical or different.

Wherein, the sampling rate of the first analog to digital converter 510 is higher than the sampling rate of the second analog to digital converter 520, the sampling precision of the first analog to digital converter 510 can higher than, be equal to or less than the sampling precision of the second analog to digital converter 520.For instance, the second analog to digital converter 520 is SARADC, and the first analog to digital converter 510 for example can be EADC.Certainly, the first analog to digital converter 510 can be also other different analog to digital converter of sampling rate with the second analog to digital converter 520.The 3rd analog to digital converter 530 can be the analog-digital converter of EADC or SARADC or other type.

The first analog to digital converter 510, obtains the first input voltage sampled value for the first input voltage sampling location sampling at power supply.The second analog to digital converter 520, obtains the second input voltage sampled value for the second input voltage sampling location sampling at power supply.

In some embodiments of the invention, processor 550 can in several ways, obtain the first feedforward gain coefficient based on the first input voltage sampled value, for example.Processor 550 can calculate reference input voltage value corresponding to the first input voltage sampling location and the first input voltage sampled value ratio, using this ratio as the first feedforward gain coefficient corresponding to the first input voltage sampled value, or, processor 550 can be in default magnitude of voltage and feedforward gain coefficient corresponding relation record, find out the first feedforward gain coefficient corresponding to the first input voltage sampled value, wherein, for example can record default magnitude of voltage and feedforward gain coefficient corresponding relation by look-up table, especially, if do not have the magnitude of voltage of record in any one record to equal the first input voltage sampled value in look-up table, for example also can be by the feedforward gain coefficient recording in institute's recording voltage value in look-up table and the immediate record of the first input voltage sampled value, as the first feedforward gain coefficient corresponding to the first input voltage sampled value.Wherein, utilize the first feedforward gain coefficient getting can offset to a certain extent input and change the output pulsation causing.For example, the input voltage of supposing power input is 48V from the reference input voltage of 48V(hypothesis power input) change to 60V, the first feedforward gain coefficient for example can be changed to 0.8 from 1, to offset input, changes the output pulsation causing.

In some embodiments of the invention, processor 550 can be in several ways, based on the second input voltage sampled value, obtain the mode of the second feedforward gain coefficient, for example, processor 550 can calculate reference input voltage value corresponding to the second input voltage sampling location and the second input voltage sampled value ratio, using this ratio as the first feedforward gain coefficient corresponding to the second input voltage sampled value, or, processor 550 can be in default magnitude of voltage and feedforward gain coefficient corresponding relation record, find out the second feedforward gain coefficient corresponding to the second input voltage sampled value, wherein, for example can record default magnitude of voltage and feedforward gain coefficient corresponding relation by look-up table, especially, if do not have the magnitude of voltage of record in any one record to equal the second input voltage sampled value in look-up table, feedforward gain coefficient in the immediate record of the magnitude of voltage that for example also look-up table can be recorded and the second input voltage sampled value, as the second feedforward gain coefficient corresponding to the second input voltage sampled value.Wherein, utilize the second feedforward gain coefficient getting can offset to a certain extent input and change the output pulsation causing.For example, the input voltage of supposing power input is 48V from the reference input voltage of 48V(hypothesis power input) change to 60V, the second feedforward gain coefficient for example can be changed to 0.8 from 1, to offset input, changes the output pulsation causing.

In some embodiments of the invention, if the absolute value of the difference of the reference output voltage value that the first output voltage sampled value that the 3rd analog to digital converter 530 samplings obtain is corresponding with the first output voltage sampling location is greater than or equal to first threshold, and the difference of the input voltage feed forward gain coefficient of the first feedforward gain coefficient and the current use of power supply is more than or equal to the 3rd threshold value (wherein, the 3rd threshold value can specifically be set according to actual needs, the span of the 3rd threshold value is for example between 1 ~ 10 times of minimum step, the 3rd threshold value is for example got minimum step, certainly its value also can be the value that other can be satisfied the demand), processor 550 can be fixed (for example 1 ~ 10 of minimum step times or other multiple) or on-fixed step-length steps to the first feedforward gain coefficient by the input voltage feed forward gain coefficient of the current use of power supply, wherein, the first feedforward gain coefficient obtains based on the first input voltage sampled value, and by the first analog to digital converter 510, the first input voltage sampling location at power supply obtains with the first sampling rate sampling the first input voltage sampled value.

In some embodiments of the invention, if the absolute value of the difference of the reference output voltage value that the first output voltage sampled value that the 3rd analog to digital converter 530 samplings obtain is corresponding with the first output voltage sampling location is less than or equal to Second Threshold, if and the absolute value of the difference of the input voltage feed forward gain coefficient of the second feedforward gain coefficient and the current use of power supply is greater than or equal to the 4th threshold value (wherein, the 4th threshold value is specifically set according to actual needs, the span of the 4th threshold value is for example between 1 ~ 10 times of minimum step, the 4th threshold value is for example got minimum step, certainly its value also can be the value that other can be satisfied the demand), processor 550 can be fixed (as 1 ~ 10 of minimum step times or other multiple) or on-fixed step-length steps to the second feedforward gain coefficient by the input voltage feed forward gain coefficient of the current use of power supply, wherein, the second feedforward gain coefficient obtains based on the second input voltage sampled value, by the second analog to digital converter 520, the second input voltage sampling location at power supply obtains with the second sampling rate sampling the second input voltage sampled value, and first threshold is more than or equal to Second Threshold.

In some embodiments of the invention, processor 550 also can further be carried out following steps: if select the first feedforward gain coefficient as the input voltage feed forward gain coefficient of power supply, the first feedforward gain coefficient and feedback loop dutycycle are multiplied by mutually and produce the dutycycle that power supply is used; If select the second feedforward gain coefficient as the input voltage feed forward gain coefficient of power supply, the second feedforward gain coefficient and feedback loop dutycycle are multiplied by mutually and produce the dutycycle that power supply is used.

Be understandable that, the function of each functional module of the power supply feedforward control device 500 of the present embodiment can be according to the method specific implementation in said method embodiment, and its specific implementation process can, with reference to the associated description of said method embodiment, repeat no more herein.

Therefore power supply feedforward control device 500 comprises the 3rd analog to digital converter and processor in the present embodiment, utilize the 3rd analog to digital converter to obtain the first output voltage sampled value in the first output voltage sampling location sampling of power supply; If the absolute value of the difference of the reference output voltage value that the first output voltage sampled value is corresponding with the first output voltage sampling location is more than or equal to first threshold, select the first feedforward gain coefficient of sampling and obtaining the first input voltage sampled value and obtain with the first sampling rate, as the input voltage feed forward gain coefficient of power supply; If the absolute value of the difference of the reference output voltage value that the first output voltage sampled value is corresponding with the first output voltage sampling location is less than or equal to Second Threshold, select the second feedforward gain coefficient of sampling and obtaining the second input voltage sampled value and obtain with the second sampling rate, as the input voltage feed forward gain coefficient of power supply.Because the first sampling rate is higher than the second sampling rate, if therefore according to the situation of change of output voltage, the feedforward gain coefficient of selecting the sampled value based on different sampling rate analog to digital converters to obtain, be conducive to better meet the regulation and control requirement under the multiple rate of change of input voltage the voltage fluctuation while being conducive to effectively suppress input voltage variation; And adopt less hardware costs just can reach and suppress output disturbance effect, actual effect is obviously with a wide range of applications.

Referring to Fig. 6, the embodiment of the present invention also provides a kind of supply unit 600, comprising:

Loop of power circuit 610 and the power supply feedforward control device 620 being connected with loop of power circuit.

Wherein, power supply feedforward control device 620 for example can be power supply feedforward control device 400 or the power supply feedforward control device 500 of describing in above-described embodiment, the dependency structure of power supply feedforward control device 620 and function can be with reference to above-described embodiment the associated description about power supply feedforward control device 400 or power supply feedforward control device 500, repeat no more herein.

The embodiment of the present invention also provides a kind of computer-readable storage medium, and wherein, this computer-readable storage medium can have program stored therein, and this program comprises the part or all of step of the power supply feed forward control method of recording in said method embodiment while carrying out.

It should be noted that, for aforesaid each embodiment of the method, for simple description, therefore it is all expressed as to a series of combination of actions, but those skilled in the art should know, the present invention is not subject to the restriction of described sequence of movement, because according to the present invention, some step can adopt other orders or carry out simultaneously.Secondly, those skilled in the art also should know, the embodiment described in instructions all belongs to preferred embodiment, and related action and module might not be that the present invention is necessary.

In the above-described embodiments, the description of each embodiment is all emphasized particularly on different fields, in certain embodiment, there is no the part of detailed description, can be referring to the associated description of other embodiment.

In the several embodiment that provide in the application, should be understood that disclosed device can be realized by another way.For example, device embodiment described above is only schematic, the for example division of described unit, be only that a kind of logic function is divided, during actual realization, can there is other dividing mode, for example a plurality of unit or assembly can in conjunction with or can be integrated into another system, or some features can ignore, or do not carry out.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be by some interfaces, indirect coupling or the communication connection of device or unit can be electrical or other form.

The described unit as separating component explanation can or can not be also physically to separate, and the parts that show as unit can be or can not be also physical locations, can be positioned at a place, or also can be distributed in a plurality of network element.Can select according to the actual needs some or all of unit wherein to realize the object of the present embodiment scheme.

In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, can be also that the independent physics of unit exists, and also can be integrated in a unit two or more unit.Above-mentioned integrated unit both can adopt the form of hardware to realize, and also can adopt the form of SFU software functional unit to realize.

If the form of SFU software functional unit of usining described integrated unit realizes and during as production marketing independently or use, can be stored in a computer read/write memory medium.Understanding based on such, the all or part of of the part that technical scheme of the present invention contributes to prior art in essence in other words or this technical scheme can embody with the form of software product, this computer software product is stored in a storage medium, comprises that some instructions are with so that a computer equipment (can be personal computer, server or the network equipment etc.) is carried out all or part of step of method described in each embodiment of the present invention.And aforesaid storage medium comprises: various media that can be program code stored such as USB flash disk, ROM (read-only memory) (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), portable hard drive, magnetic disc or CDs.

The above, above embodiment only, in order to technical scheme of the present invention to be described, is not intended to limit; Although the present invention is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.

Claims

1. a power supply feed forward control method, is characterized in that, comprising:

2. method according to claim 1, is characterized in that,

Described the first feedforward gain coefficient is comprised based on the first input voltage sampled value: in default magnitude of voltage and feedforward gain coefficient corresponding relation record, find out the first feedforward gain coefficient corresponding to the first input voltage sampled value; Or, calculate reference input voltage value corresponding to described the first input voltage sampling location and described the first input voltage sampled value ratio, using described ratio as the first feedforward gain coefficient corresponding to described the first input voltage sampled value.

3. method according to claim 1 and 2, is characterized in that,

Described the second feedforward gain coefficient is comprised based on the second input voltage sampled value: calculate corresponding reference input voltage value and described the second input voltage sampled value ratio in the second input voltage sampling location, by the second input voltage sampling location calculating corresponding reference input voltage value and described the second input voltage sampled value ratio, as the second feedforward gain coefficient corresponding to described the second input voltage sampled value; Or, in default magnitude of voltage and feedforward gain coefficient corresponding relation record, find out the second feedforward gain coefficient corresponding to described the second input voltage sampled value.

4. according to the method described in claim 1 to 2 any one, it is characterized in that, described the first feedforward gain coefficient of described selection is as the input voltage feed forward gain coefficient of described power supply, comprise: if the absolute value of the difference of the input voltage feed forward gain coefficient of described the first feedforward gain coefficient and the current use of described power supply is more than or equal to the 3rd threshold value, to fix or on-fixed step-length steps to the first feedforward gain coefficient by the input voltage feed forward gain coefficient of the current use of described power supply.

5. method according to claim 3, it is characterized in that, described the first feedforward gain coefficient of described selection is as the input voltage feed forward gain coefficient of described power supply, comprise: if the absolute value of the difference of the input voltage feed forward gain coefficient of described the first feedforward gain coefficient and the current use of described power supply is more than or equal to the 3rd threshold value, to fix or on-fixed step-length steps to the first feedforward gain coefficient by the input voltage feed forward gain coefficient of the current use of described power supply.

6. according to the method described in claim 1 to 2 any one, it is characterized in that, described the second feedforward gain coefficient of described selection is as the input voltage feed forward gain coefficient of described power supply, comprise: if the absolute value of the difference of the input voltage feed forward gain coefficient of described the second feedforward gain coefficient and the current use of described power supply is more than or equal to the 4th threshold value, to fix or on-fixed step-length steps to described the second feedforward gain coefficient by the input voltage feed forward gain coefficient of the current use of described power supply.

7. method according to claim 3, it is characterized in that, described the second feedforward gain coefficient of described selection is as the input voltage feed forward gain coefficient of described power supply, comprise: if the absolute value of the difference of the input voltage feed forward gain coefficient of described the second feedforward gain coefficient and the current use of described power supply is more than or equal to the 4th threshold value, to fix or on-fixed step-length steps to described the second feedforward gain coefficient by the input voltage feed forward gain coefficient of the current use of described power supply.

8. method according to claim 4, it is characterized in that, described the second feedforward gain coefficient of described selection is as the input voltage feed forward gain coefficient of described power supply, comprise: if the absolute value of the difference of the input voltage feed forward gain coefficient of described the second feedforward gain coefficient and the current use of described power supply is more than or equal to the 4th threshold value, to fix or on-fixed step-length steps to described the second feedforward gain coefficient by the input voltage feed forward gain coefficient of the current use of described power supply.

9. method according to claim 5, it is characterized in that, described the second feedforward gain coefficient of described selection is as the input voltage feed forward gain coefficient of described power supply, comprise: if the absolute value of the difference of the input voltage feed forward gain coefficient of described the second feedforward gain coefficient and the current use of described power supply is more than or equal to the 4th threshold value, to fix or on-fixed step-length steps to described the second feedforward gain coefficient by the input voltage feed forward gain coefficient of the current use of described power supply.

10. according to the method described in claim 1 to 2 any one, it is characterized in that,

Described method also comprises: if select described the first feedforward gain coefficient as the input voltage feed forward gain coefficient of described power supply, described the first feedforward gain coefficient and feedback loop dutycycle are multiplied by mutually and produce the dutycycle that described power supply is used; If select described the second feedforward gain coefficient as the input voltage feed forward gain coefficient of described power supply, described the second feedforward gain coefficient and feedback loop dutycycle are multiplied by mutually and produce the dutycycle that described power supply is used.

11. methods according to claim 3, is characterized in that,

12. methods according to claim 4, is characterized in that,

13. methods according to claim 5, is characterized in that,

14. methods according to claim 6, is characterized in that,

15. methods according to claim 7, is characterized in that,

16. methods according to claim 8, is characterized in that,

17. methods according to claim 9, is characterized in that,

18. according to the method described in claim 1 to 2 any one, it is characterized in that the voltage input end that the first input voltage sampling location of described power supply is described power supply; And/or, the voltage input end that the second input voltage sampling location of described power supply is described power supply; And/or, the voltage output end that the first output voltage sampling location of described power supply is described power supply.

19. methods according to claim 3, is characterized in that, the voltage input end that the first input voltage sampling location of described power supply is described power supply; And/or, the voltage input end that the second input voltage sampling location of described power supply is described power supply; And/or, the voltage output end that the first output voltage sampling location of described power supply is described power supply.

20. methods according to claim 4, is characterized in that, the voltage input end that the first input voltage sampling location of described power supply is described power supply; And/or, the voltage input end that the second input voltage sampling location of described power supply is described power supply; And/or, the voltage output end that the first output voltage sampling location of described power supply is described power supply.

21. methods according to claim 5, is characterized in that, the voltage input end that the first input voltage sampling location of described power supply is described power supply; And/or, the voltage input end that the second input voltage sampling location of described power supply is described power supply; And/or, the voltage output end that the first output voltage sampling location of described power supply is described power supply.

22. methods according to claim 6, is characterized in that, the voltage input end that the first input voltage sampling location of described power supply is described power supply; And/or, the voltage input end that the second input voltage sampling location of described power supply is described power supply; And/or, the voltage output end that the first output voltage sampling location of described power supply is described power supply.

23. methods according to claim 7, is characterized in that, the voltage input end that the first input voltage sampling location of described power supply is described power supply; And/or, the voltage input end that the second input voltage sampling location of described power supply is described power supply; And/or, the voltage output end that the first output voltage sampling location of described power supply is described power supply.

24. methods according to claim 8, is characterized in that, the voltage input end that the first input voltage sampling location of described power supply is described power supply; And/or, the voltage input end that the second input voltage sampling location of described power supply is described power supply; And/or, the voltage output end that the first output voltage sampling location of described power supply is described power supply.

25. methods according to claim 9, is characterized in that, the voltage input end that the first input voltage sampling location of described power supply is described power supply; And/or, the voltage input end that the second input voltage sampling location of described power supply is described power supply; And/or, the voltage output end that the first output voltage sampling location of described power supply is described power supply.

26. methods according to claim 10, is characterized in that, the voltage input end that the first input voltage sampling location of described power supply is described power supply; And/or, the voltage input end that the second input voltage sampling location of described power supply is described power supply; And/or, the voltage output end that the first output voltage sampling location of described power supply is described power supply.

27. methods according to claim 11, is characterized in that, the voltage input end that the first input voltage sampling location of described power supply is described power supply; And/or, the voltage input end that the second input voltage sampling location of described power supply is described power supply; And/or, the voltage output end that the first output voltage sampling location of described power supply is described power supply.

28. methods according to claim 12, is characterized in that, the voltage input end that the first input voltage sampling location of described power supply is described power supply; And/or, the voltage input end that the second input voltage sampling location of described power supply is described power supply; And/or, the voltage output end that the first output voltage sampling location of described power supply is described power supply.

29. methods according to claim 13, is characterized in that, the voltage input end that the first input voltage sampling location of described power supply is described power supply; And/or, the voltage input end that the second input voltage sampling location of described power supply is described power supply; And/or, the voltage output end that the first output voltage sampling location of described power supply is described power supply.

30. methods according to claim 14, is characterized in that, the voltage input end that the first input voltage sampling location of described power supply is described power supply; And/or, the voltage input end that the second input voltage sampling location of described power supply is described power supply; And/or, the voltage output end that the first output voltage sampling location of described power supply is described power supply.

31. methods according to claim 15, is characterized in that, the voltage input end that the first input voltage sampling location of described power supply is described power supply; And/or, the voltage input end that the second input voltage sampling location of described power supply is described power supply; And/or, the voltage output end that the first output voltage sampling location of described power supply is described power supply.

32. methods according to claim 16, is characterized in that, the voltage input end that the first input voltage sampling location of described power supply is described power supply; And/or, the voltage input end that the second input voltage sampling location of described power supply is described power supply; And/or, the voltage output end that the first output voltage sampling location of described power supply is described power supply.

33. methods according to claim 17, is characterized in that, the voltage input end that the first input voltage sampling location of described power supply is described power supply; And/or, the voltage input end that the second input voltage sampling location of described power supply is described power supply; And/or, the voltage output end that the first output voltage sampling location of described power supply is described power supply.

34. 1 kinds of power supply feedforward control devices, is characterized in that, comprising:

35. power supply feedforward control devices according to claim 34, is characterized in that,

Described power supply feedforward control device also comprises: the first analog to digital converter, obtains described the first input voltage sampled value for the first input voltage sampling location at described power supply with the first sampling rate sampling; The second analog to digital converter, obtains described the second input voltage sampled value for the second input voltage sampling location at described power supply with the second sampling rate sampling.

36. power supply feedforward control devices according to claim 35, is characterized in that,

Described the first analog to digital converter is error simulation digital quantizer; And/or,

Described the second analog to digital converter is successive approximation simulation digital quantizer.

37. power supply feedforward control devices according to claim 34, is characterized in that,

Described the 3rd analog to digital converter is error simulation digital quantizer or successive approximation simulation digital quantizer.

38. according to the power supply feedforward control device described in claim 34 to 37 any one, it is characterized in that,

Described control module comprises:

39. according to the power supply feedforward control device described in claim 34 to 37 any one, it is characterized in that,

Described power supply feedforward control device also comprises:

40. according to the power supply feedforward control device described in claim 38, it is characterized in that,

Described power supply feedforward control device also comprises:

41. according to the power supply feedforward control device described in claim 34 to 37 any one, it is characterized in that,

The voltage input end that the first input voltage sampling location of described power supply is described power supply; And/or,

The voltage input end that the second input voltage sampling location of described power supply is described power supply; And/or,

The voltage output end that the first output voltage sampling location of described power supply is described power supply.

42. according to the power supply feedforward control device described in claim 38, it is characterized in that,

43. according to the power supply feedforward control device described in claim 39, it is characterized in that,

44. according to the power supply feedforward control device described in claim 40, it is characterized in that,

45. 1 kinds of supply units, is characterized in that, comprising:

Loop of power circuit and the power supply feedforward control device being connected with described loop of power circuit;

Wherein, described power supply feedforward control device is the power supply feedforward control device as described in claim 34 to 44 any one.