CN109004843A - A kind of voltage control method and device - Google Patents
A kind of voltage control method and device Download PDFInfo
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- CN109004843A CN109004843A CN201811038354.XA CN201811038354A CN109004843A CN 109004843 A CN109004843 A CN 109004843A CN 201811038354 A CN201811038354 A CN 201811038354A CN 109004843 A CN109004843 A CN 109004843A
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- control signal
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- difference
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33507—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
- Ac-Ac Conversion (AREA)
Abstract
The embodiment of the present invention proposes a kind of voltage control method and device, is related to power electronics field.The present operating voltage of controller acquisition load, and voltage difference is obtained according to present operating voltage and a reference voltage；The input voltage that preset durations and power supply when controller is powered every time according to voltage difference, transformer provide obtains frequency difference；Controller adjusts the current frequency of control signal according to present operating voltage, reference voltage and frequency difference, to obtain newly controlling signal and export to phase whole-bridging circuit, so that the present operating voltage of load is adjusted to reference voltage according to new control signal and input voltage by phase whole-bridging circuit.Voltage control method provided by the invention controls the operating voltage that phase whole-bridging circuit is provided to load by adjusting the frequency of control signal, improves the power density and reliability of phase whole-bridging circuit.
Description
Technical field
The present invention relates to power electronics fields, in particular to a kind of voltage control method and device.
Background technique
In order to enable power electronic equipment miniaturization, lightweight, phase whole-bridging circuit are generally adopted by high switching frequency
The mode of constant frequency phase shifting control controls output voltage.Using the phase whole-bridging circuit of constant frequency phase shifting control, there are transformer underloadings
When, the switching tube in the phase whole-bridging circuit of constant frequency phase shifting control is difficult to realize zero voltage switch, since constant frequency phase shifting control is adopted
It is controlled with high frequency, so that the loss of switching tube is very big, needs to increase the volume of radiator, existed when Simultaneous Switching pipe is opened very big
Variable-current, it will very big electromagnetic interference is caused to the periphery electric appliance of power electronic equipment.
Summary of the invention
The purpose of the present invention is to provide a kind of voltage control method and device, this method controls the frequency of signal by adjusting
Rate and then the operating voltage that phase whole-bridging circuit is provided to load is controlled, improves the power density of phase whole-bridging circuit and reliable
Property.
To achieve the goals above, technical solution used in the embodiment of the present invention is as follows:
In a first aspect, being applied to power electronic equipment, the electricity the embodiment of the invention provides a kind of voltage control method
Power electronic device includes controller, phase whole-bridging circuit, load and power supply, the controller and the phase whole-bridging circuit, institute
It states load to be electrically connected, the phase whole-bridging circuit is electrically connected with the load, the power supply, and the power supply is used for described
Phase whole-bridging circuit provides input voltage, and the controller is used to export control signal, the shifting to the phase whole-bridging circuit
Phase full-bridge circuit is used to provide operating voltage, the phase shift according to the control signal and the input voltage for the load
Full-bridge circuit includes transformer, which comprises the controller acquires the present operating voltage of the load；The control
Device obtains voltage difference according to the present operating voltage and a reference voltage；The controller is according to the voltage difference, institute
It states preset durations when transformer is powered every time and the input voltage obtains frequency difference；The controller is according to institute
The current frequency that present operating voltage, the reference voltage and the frequency difference adjust the control signal is stated, it is new to obtain
It controls signal and exports to the phase whole-bridging circuit, so that the phase whole-bridging circuit is according to the new control signal and institute
It states input voltage and the present operating voltage of the load is adjusted to the reference voltage.
Second aspect, the embodiment of the invention also provides a kind of voltage-operated devices, are applied to power electronic equipment, described
Power electronic equipment includes controller, phase whole-bridging circuit, load and power supply, the controller and the phase whole-bridging circuit,
The load is electrically connected, and the phase whole-bridging circuit is electrically connected with the load, the power supply, and the power supply is used for institute
It states phase whole-bridging circuit and input voltage is provided, the controller is used to export control signal to the phase whole-bridging circuit, described
Phase whole-bridging circuit is used to provide operating voltage, the shifting according to the control signal and the input voltage for the load
Phase full-bridge circuit includes transformer, and described device includes: acquisition unit, for acquiring the present operating voltage of the load；The
One computing unit, for obtaining voltage difference according to the present operating voltage and a reference voltage；Second computing unit, is used for
Preset durations and the input voltage when being powered every time according to the voltage difference, the transformer obtain difference on the frequency
Value；Frequency adjusts unit, for adjusting the control according to the present operating voltage, the reference voltage and the frequency difference
The current frequency of signal processed, to obtain newly controlling signal and export to the phase whole-bridging circuit, so as to the phase-shifting full-bridge electricity
The present operating voltage of the load is adjusted to described with reference to electricity by road according to the new control signal and the input voltage
Pressure.
A kind of voltage control method and device provided in an embodiment of the present invention are applied to power electronic equipment, electric power electricity
Sub-device includes controller, phase whole-bridging circuit, load and power supply, and controller is electrically connected with phase whole-bridging circuit, load, moves
Phase full-bridge circuit is electrically connected with load, power supply, and phase whole-bridging circuit includes transformer；This method comprises: controller acquisition is negative
The present operating voltage of load；Controller obtains voltage difference according to present operating voltage and a reference voltage；Controller is according to electricity
Preset durations and input voltage when pressure difference, transformer are powered every time obtain frequency difference；Controller is according to current
Operating voltage, reference voltage and frequency difference adjust the current frequency of control signal, to obtain newly controlling signal and export to shifting
Phase full-bridge circuit, so that phase whole-bridging circuit is adjusted the present operating voltage of load according to new control signal and input voltage
For reference voltage.As it can be seen that controller is when the present operating voltage of load changes by adjusting the current frequency for controlling signal
Rate and do not change preset durations when transformer is powered every time, and then adjusts preset durations when transformer is powered
Duty ratio is equal to reference voltage in order to control the present operating voltage of load, so that the work electricity of phase whole-bridging circuit output
Press reliability, power density and efficiency more stable, and then that improve phase whole-bridging circuit.
To enable the above objects, features and advantages of the present invention to be clearer and more comprehensible, preferred embodiment is cited below particularly, and cooperate
Appended attached drawing, is described in detail below.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 shows the structural block diagram of power electronic equipment provided in an embodiment of the present invention；
Fig. 2 shows the flow diagrams of voltage control method provided in an embodiment of the present invention；
Fig. 3 shows the control principle drawing of controller provided in an embodiment of the present invention；
Fig. 4 shows the structural schematic diagram of voltage-operated device provided in an embodiment of the present invention.
Icon: 1- power electronic equipment；10- controller；20- phase whole-bridging circuit；30- power supply；40- voltage control dress
It sets；41- acquisition unit；The first computing unit of 42-；The second computing unit of 43-；44- frequency adjusts unit；R0- load；VT1-
One switch；VT2- second switch；VT3- third switch；VT4- the 4th is switched；T- transformer；VD1- first diode；VD2-
Two diodes；VD3- third diode；The 4th diode of VD4-；The 5th diode of VD5-；The 6th diode of VD6-；C1- first
Capacitor；The second capacitor of C2-；C3- third capacitor；The 4th capacitor of C4-；The 5th capacitor of C0-；The first inductance of Lr-；The second inductance of L1-；
L2- third inductance.
Specific embodiment
Below in conjunction with attached drawing in the embodiment of the present invention, technical solution in the embodiment of the present invention carries out clear, complete
Ground description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Usually exist
The component of the embodiment of the present invention described and illustrated in attached drawing can be arranged and be designed with a variety of different configurations herein.Cause
This, is not intended to limit claimed invention to the detailed description of the embodiment of the present invention provided in the accompanying drawings below
Range, but it is merely representative of selected embodiment of the invention.Based on the embodiment of the present invention, those skilled in the art are not doing
Every other embodiment obtained under the premise of creative work out, shall fall within the protection scope of the present invention.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.Meanwhile of the invention
In description, term " first ", " second " etc. are only used for distinguishing description, are not understood to indicate or imply relative importance.
As shown in Figure 1, be the structural block diagram of power electronic equipment 1 provided in an embodiment of the present invention, the power electronics dress
It sets 1 and includes controller 10, phase whole-bridging circuit 20, load R0 and power supply 30, the controller 10 and the phase whole-bridging circuit
20, the load R0 is electrically connected, and the phase whole-bridging circuit 20 is electrically connected with the load R0, the power supply 30, described
Power supply 30 is used to provide input voltage to the phase whole-bridging circuit 20, and the controller 10 is used for the phase whole-bridging circuit
20 output control signals, the phase whole-bridging circuit 20 are used to according to the control signal and the input voltage be described negative
It carries R0 and operating voltage is provided.
The phase whole-bridging circuit 20 includes transformer T, first switch VT1, second switch VT2, third switch VT3 and the
Four switch VT4, the first switch VT1 and the second switch VT2, the third switch VT3 are electrically connected, and the described 4th opens
VT4 is closed to be electrically connected with the second switch VT2, the third switch VT3, the controller 10 and the power supply 30 respectively with
The first switch VT1, the second switch VT2, the third switch VT3 and the 4th switch VT4 are electrically connected, described
Transformer T includes primary coil, and one end of the primary coil is electrically connected to the first switch VT1 and the second switch
Between VT2, the other end of the primary coil is electrically connected between the third switch VT3 and the 4th switch VT4.
In the present embodiment, the first switch VT1, second switch VT2, third switch VT3 and the 4th switch VT4
To use power tube.It is appreciated that the first switch VT1, second switch VT2, third switch VT3 and the 4th switch VT4 are equal
P-channel field-effect transistor (PEFT) pipe be able to can use using power tube, wherein the drain electrode of first switch VT1 and one end of power supply 30 and the
The drain electrode of three switch VT3 is electrically connected, and the grid of first switch VT1 is electrically connected with controller 10, the source electrode of first switch VT1 with
The drain electrode of second switch VT2 and one end of primary coil are electrically connected, the drain electrode of second switch VT2 and one end electricity of primary coil
Connection, the grid of second switch VT2 is electrically connected with controller 10, the source electrode of second switch VT2 and the other end of power supply 30 and the
The source electrode of four switch VT4 is electrically connected, and the drain electrode of third switch VT3 is electrically connected with one end of power supply 30, the grid of third switch VT3
Pole is electrically connected with controller 10, and the drain electrode of the other end and the 4th switch VT4 of the source electrode and primary coil of third switch VT3 is electrically connected
It connects, the drain electrode of the 4th switch VT4 is electrically connected with the other end of primary coil, and grid and the controller 10 of the 4th switch VT4 is electrically connected
It connects, the source electrode of the 4th switch VT4 is electrically connected with the other end of power supply 30.
Further, in the present embodiment, the phase whole-bridging circuit 20 further includes first diode VD1, the two or two pole
Pipe VD2, third diode VD3, the 4th diode VD4, the 5th diode VD5, the 6th diode VD6, first capacitor C1, second
Capacitor C2, third capacitor C3, the 4th capacitor C4, the 5th capacitor C0, the first inductance Lr, the second inductance L1 and third inductance L2 become
Depressor T further includes secondary coil, and the cathode of first diode VD1 and the drain electrode of first switch VT1, one end of first capacitor C1 are equal
Electrical connection, the anode of first diode VD1 and the source electrode of first switch VT1, the other end of first capacitor C1, the first inductance Lr
One end is electrically connected, the cathode and the drain electrode of second switch VT2, one end of the second capacitor C2, the first inductance of the second diode VD2
One end of Lr is electrically connected, and the anode of the second diode VD2 and source electrode, the other end of the second capacitor C2 of second switch VT2 are equal
Electrical connection, the cathode of third diode VD3 are electrically connected with one end of the drain electrode of third switch VT3, third capacitor C3, and the three or two
The anode of pole pipe VD3 is electrically connected with the other end of the source electrode of third switch VT3, third capacitor C3, the yin of the 4th diode VD4
Pole is electrically connected with one end of the drain electrode of the 4th switch VT4, the 4th capacitor C4, the anode of the 4th diode VD4 and the 4th switch
The source electrode of VT4, the 4th capacitor C4 the other end be electrically connected, the other end of the first inductance Lr and one end of primary coil are electrically connected
Connect, one end of secondary coil is electrically connected with one end of the cathode of the 5th diode VD5, the second inductance L1, secondary coil it is another
One end is electrically connected with one end of the cathode of the 6th diode VD6, third inductance L2, the anode and the 6th of the 5th diode VD5
The anode of diode VD6, one end of the 5th capacitor C0, one end for loading R0 are electrically connected, the anode of the 6th diode VD6 and the
One end of five capacitor C0, the one end for loading R0 are electrically connected, the other end of the other end of the second inductance L1 and third inductance L2, the
The other end of five capacitor C0, the other end for loading R0 are electrically connected, and the other end of third inductance L2 is another with the 5th capacitor C0's
End, the other end for loading R0 are electrically connected, and one end of the 5th capacitor C0 is electrically connected with one end of load R0, and the 5th capacitor C0's is another
One end is electrically connected with the other end of load R0.
In the present embodiment, first diode VD1, the second diode VD2, third diode VD3, the 4th diode VD4
Power body diode can be used；First capacitor C1, the second capacitor C2, third capacitor C3, the 4th capacitor C4 can use function
Rate junction capacitance；5th diode VD5, the 6th diode VD6 can use rectifying tube；Second inductance L1 and third inductance L2
Filter capacitor can be used；5th capacitor C0 can use filter capacitor；Controller 10 can use digital signal processor
(Digital Signal Processing, DSP)；Power supply 30 can use DC power supply 30.
It referring to figure 2., is the flow diagram of voltage control method provided by the embodiment of the present invention.It needs to illustrate
It is that voltage control method described in the embodiment of the present invention is not limitation with Fig. 2 and specific order as described below.It should manage
Solution, in other embodiments, the sequence of voltage control method part step of the present invention can be according to actual needs
It is exchanged with each other or part steps therein also can be omitted or delete.The voltage control method can be applied to above-mentioned electric power
Electronic device 1 below will be described in detail detailed process shown in Fig. 2.
Step S101, the controller 10 acquire the present operating voltage of the load R0.
In the present embodiment, present operating voltage (the i.e. phase whole-bridging circuit at the acquisition of the controller 10 load both ends R0
20 operating voltages provided to load R0).The present operating voltage for loading the both ends R0 changes in the input voltage that power supply 30 provides
When, it can also change accordingly, if input voltage becomes larger, present operating voltage can also increase accordingly；Load the both ends R0
Corresponding variation can also occur when the impedance for loading R0 changes for present operating voltage, increase in the impedance for loading R0 at light load
Greatly, the present operating voltage for loading the both ends R0 can also increase accordingly, reduce in the impedance for loading R0 when overloaded, load the both ends R0
Present operating voltage can also reduce accordingly.
Step S102, the controller 10 obtain voltage difference according to the present operating voltage and a reference voltage.
In the present embodiment, present operating voltage and reference voltage are carried out subtraction and obtain voltage by the controller 10
Difference, wherein reference voltage is the operating voltage value normally exported when designing phase whole-bridging circuit 20, i.e. load R0 is worked normally
The operating voltage of Shi Suoxu.
Step S103, it is default lasting when the controller 10 is powered every time according to the voltage difference, the transformer T
Time and the input voltage obtain frequency difference.
In the present embodiment, the controller 10 is according to formulaThe frequency difference is calculated,
In, Δ V0Indicate that the voltage difference, Tuf indicate that the preset durations, Δ f indicate the frequency difference, U1Described in expression
Input voltage, a indicate the turn ratio of the transformer T.
In the present embodiment, the voltage difference being calculated in step S102 is brought into above-mentioned formula by controller 10,
And then obtain frequency difference, wherein preset durations when transformer T is powered every time are the constant being arranged in advance, input electricity
Pressure is the constant just set when designing phase whole-bridging circuit 20, and the turn ratio of transformer T is also in design phase-shifting full-bridge electricity
The constant just set when road 20.
Step S104, the controller 10 is according to the present operating voltage, the reference voltage and the frequency difference
The current frequency of the control signal is adjusted, to obtain newly controlling signal and export to the phase whole-bridging circuit 20, with toilet
Phase whole-bridging circuit 20 is stated according to new signal and the input voltage of controlling by the present operating voltage of the load R0
It is adjusted to the reference voltage.
In the present embodiment, the control signal include first control signal, second control signal, third control signal and
4th control signal, the first control signal, the second control signal, third control signal and the 4th control
Signal is respectively used to control the first switch VT1, the second switch VT2, the third switch VT3 and the 4th switch
VT4。
It is appreciated that the controller 10 is according to the present operating voltage, the reference voltage and the frequency difference
The first control signal, the second control signal, third control signal and the 4th control signal are adjusted respectively
Current frequency, newly control signal and "four news" (new ideas control signal to obtain the first new control signal, the second new control signal, third
And it is exported respectively to the first switch VT1, the second switch VT2, the third switch VT3 and the 4th switch VT4.
As shown in figure 3, being the control principle drawing of controller 10, the first control signal includes the first switch VT1
The first initial turn-on time t0 in a current switch periods, the second control signal includes the second switch
Second initial turn-on time t2 of the VT2 in the switch periods, the third control signal includes that the third switch VT3 exists
First in the switch periods terminates turn-on time t7, and the 4th control signal includes the 4th switch VT4 described
Second in switch periods terminates turn-on time t5.
Further, the first control signal further includes third of the first switch VT1 in the switch periods
Turn-on time t1 is terminated, the second control signal further includes fourth end of the second switch VT2 in the switch periods
Only turn-on time t3, the third control signal further includes that third of the third switch VT3 in the switch periods is initial
Turn-on time t6, the 4th control signal further include the 4th switch VT4 the 4th initially leading in the switch periods
Logical time t4.
It is appreciated that first switch VT1 and the 4th switch VT4 time simultaneously turned on or second switch VT2 are opened with third
Closing time for simultaneously turning on of VT3 is preset durations when transformer T is powered every time, i.e., third terminates turn-on time t1 and the
Time difference between four initial turn-on time t4 or the 4th terminate between turn-on time t3 and third initial turn-on time t6 when
Between difference be preset durations of transformer T when being powered every time.The time that first switch VT1 and second switch VT2 are simultaneously switched off
Or the time that third switch VT3 and the 4th switch VT4 are simultaneously switched off is dead time, i.e. the second initial turn-on time t2 and third
Terminate the time difference between turn-on time t1 or the time between the termination of third initial turn-on time t6 and second turn-on time t5
Difference is the dead time.When the second initial turn-on of the first initial turn-on time t0 and second switch VT2 of first switch VT1
Between time difference between t2 be the switch periods half, the first initial turn-on time t0 of first switch VT1 opens with the 4th
Close half and preset durations that the time difference between the 4th initial turn-on time t4 of VT4 is the switch periods and described
Dead time difference, the third initial turn-on time t6 of the third switch VT3 are initially led with the 4th of the 4th switch VT4
Time difference between logical time t4 is the half of the switch periods.
In the present embodiment, first switch VT1 is terminated between turn-on time t1 and the first initial turn-on time t0 in third
Time difference in it is in the conductive state, second switch VT2 the 4th terminate turn-on time t3 and the second initial turn-on time t2 it
Between time difference in it is in the conductive state, third switch VT3 terminates turn-on time t7 and third initial turn-on time t6 first
Between time difference in it is in the conductive state, the 4th switch VT4 second terminate turn-on time t5 in the 4th initial turn-on time
Time in the conductive state in time difference between t4, that transformer T is simultaneously turned in first switch VT1 and the 4th switch VT4
Interior to be in energized state, i.e., the input voltage that power supply 30 provides flows to the primary coil of transformer T by first switch VT1, defeated
Enter voltage and pass through the 4th switch VT4 again and power supply 30 is flow back by primary coil；Or transformer T is opened in second switch VT2 with third
It closes in energized state in the time that VT3 is simultaneously turned on, i.e., the input voltage that power supply 30 provides is flowed to by third switch VT3 to be become
The primary coil of depressor T, input voltage pass through second switch VT2 again and flow back into power supply 30 by primary coil.
The step S104 is specifically included: the controller 10 obtains period difference according to the frequency difference；The control
Device 10 processed adjusts first initial turn-on according to the present operating voltage, the reference voltage and the period difference respectively
Time t0 and the second initial turn-on time t2, and then adjust working as the first control signal and the second control signal
Preceding frequency obtains the described first new control signal and the second new control signal, and according to the present operating voltage, institute
It states reference voltage and the period difference adjusts described first respectively and terminates turn-on time t7 and the second termination turn-on time
T5, and then the current frequency of the third control signal and the 4th control signal is adjusted, it obtains the third and newly controls letter
Number and the "four news" (new ideas control signal.
The controller 10 is appreciated that when the present operating voltage is greater than the reference voltage, according to the week
Phase difference shifts to an earlier date the first initial turn-on time t0 and the second initial turn-on time t2, and then reduces first control
The current frequency of signal processed and the second control signal obtains the described first new control signal and the second new control letter
Number, and turn-on time t7 and described second is terminated for described first according to the period difference and terminates turn-on time t5 delay,
And then reduce the current frequency of the third control signal and the 4th control signal.The controller 10 is in the current work
It, will be at the beginning of the first initial turn-on time t0 and described second according to the period difference when making voltage less than the reference voltage
The delay of beginning turn-on time t2, and then increase the current frequency of the first control signal and the second control signal, obtain institute
When stating the first new control signal and the second new control signal, and first termination being connected according to the period difference
Between t7 and the second termination turn-on time t5 shift to an earlier date, and then increase third control signal and the 4th control signal
Current frequency.
In the present embodiment, it when the present operating voltage is greater than the reference voltage, can be acquired according to step S102
Voltage difference, according to step S103 can calculated rate difference, obtain period difference, controller 10 for the frequency difference is inverted
First initial turn-on time t0 of first control signal and the second initial turn-on time t2 of second control signal are shifted to an earlier date into institute
The half of period difference is stated, and terminates described the second of the control signal of turn-on time t7 and the 4th for the first of third control signal
Turn-on time t5 is terminated to be delayed the half of the period difference, meanwhile, controller 10 will control the third of first control signal
When terminating the third initial turn-on of turn-on time t1, the 4th termination turn-on time t3 of second control signal, third control signal
Between t6 and the 4th control signal the 4th initial turn-on time t4 remain unchanged, and then increase first control signal, second control
Signal processed, third control signal, the 4th control signal current period, in order to reduce first control signal, the second control letter
Number, third control signal, the 4th control signal current frequency, further according to the first initial turn-on time t0 of first control signal
First of time difference relationship, first control signal between the second initial turn-on time t2 of second control signal is initially led
The of time difference relationship, the 4th control signal between logical time t0 and the 4th initial turn-on time t4 of the 4th control signal
Time difference relationship between four initial turn-on time t4 and the third initial turn-on time t6 of third control signal obtains first
New control signal, the second new control signal, third newly control signal, "four news" (new ideas control signal.
Wherein, the first initial turn-on time t0 of first control signal and the second initial turn-on time of second control signal
The 4th of the control signal of first initial turn-on time t0 of time difference relationship, first control signal between t2 and the 4th is initial
The 4th initial turn-on time t4 and third of time difference relationship, the 4th control signal between turn-on time t4 control signal
The switch periods in time difference relationship between third initial turn-on time t6 are according to period difference real-time change.
As it can be seen that in the present embodiment, when the present operating voltage for loading the both ends R0 changes, controller 10 passes through tune
The change of the frequency of section control signal can change first switch VT1, second switch VT2, the switch of third switch VT3 and the 4th
The duty ratio of the turn-on time of VT4, and then the operating voltage for controlling output is consistent with reference voltage, and then improves phase shift
The power density and reliability of full-bridge circuit 20；At light load, the present operating voltage at the load both ends R0 increases, and controller 10 will
The frequency that control signal can be adjusted reduces, and then reduces first switch VT1, second switch VT2, third switch VT3 and the 4th and open
The duty ratio of the turn-on time of VT4 is closed, so that the present operating voltage increased is decreased to reference voltage, in the process, first
Switch VT1, second switch VT2, third switch VT3 and the 4th switch VT4 work subtract under a relatively low switching frequency
The switching loss of small first switch VT1, second switch VT2, third switch VT3 and the 4th switch VT4, then first switch
The heat that VT1, second switch VT2, third switch VT3 and the 4th switch VT4 are generated will reduce, and then can reduce radiator
Volume, reduce the cost and thermal design difficulty of power electronic equipment.
As shown in figure 4, for the functional block diagram of voltage-operated device 40 provided by the embodiment of the present invention.It needs
It is bright, voltage-operated device 40 provided by the present embodiment, technical effect and the preceding method reality of basic principle and generation
It is identical to apply example, to briefly describe, does not refer to part in the present embodiment, can refer to the corresponding contents in preceding method embodiment.It should
Voltage-operated device 40 can be applied to above-mentioned power electronic equipment 1, including acquisition unit 41, the first computing unit 42, second
Computing unit 43 and frequency adjust unit 44.
It is appreciated that above-mentioned acquisition unit 41, the first computing unit 42, the second computing unit 43 and frequency adjust unit
44 can be the software function module and computer program being stored in memory, and can be executed by controller 10.
The acquisition unit 41 is used to acquire the present operating voltage of the load R0.
It is appreciated that the acquisition unit 41 can execute above-mentioned steps S101.
First computing unit 42 is used to obtain voltage difference according to the present operating voltage and a reference voltage.
It is appreciated that first computing unit 42 can execute above-mentioned steps S102.
What second computing unit 43 was used for when being powered every time according to the voltage difference, the transformer T default holds
Continuous time and the input voltage obtain frequency difference.
It is appreciated that second computing unit 43 can execute above-mentioned steps S103.
The frequency adjusts unit 44 and is used for according to the present operating voltage, the reference voltage and the frequency difference
The current frequency of the control signal is adjusted, to obtain newly controlling signal and export to the phase whole-bridging circuit 20, with toilet
Phase whole-bridging circuit 20 is stated according to new signal and the input voltage of controlling by the present operating voltage of the load R0
It is adjusted to the reference voltage.
It is used for it is appreciated that the frequency adjusts unit 44 according to the present operating voltage, the reference voltage and institute
It states frequency difference and adjusts the first control signal, the second control signal, third control signal and described the respectively
The current frequency of four control signals newly controls signal and the 4th to obtain the first new control signal, the second new control signal, third
New control signal is simultaneously exported respectively to the first switch VT1, the second switch VT2, the third switch VT3 and described the
Four switch VT4.
In the present embodiment, it includes period computation subunit and periodic adjustment subelement, institute that the frequency, which adjusts unit 44,
Period computation subunit is stated for obtaining period difference according to the frequency difference；The periodic adjustment subelement is used for according to institute
It states present operating voltage, the reference voltage and the period difference and adjusts first initial turn-on time and described respectively
Two initial turn-on times, and then the current frequency of the first control signal and the second control signal is adjusted, it obtains described
First new control signal and the second new control signal, and according to the present operating voltage, the reference voltage and institute
It states period difference and adjusts the first termination turn-on time and the second termination turn-on time respectively, and then adjust the third
The current frequency for controlling signal and the 4th control signal obtains the third and newly controls signal and "four news" (new ideas control letter
Number.
It is appreciated that the frequency, which adjusts unit 44, can execute above-mentioned steps S104.
In conclusion voltage control method provided in an embodiment of the present invention and device, are applied to power electronic equipment, the electricity
Power electronic device includes controller, phase whole-bridging circuit, load and power supply, and controller is electrically connected with phase whole-bridging circuit, load
It connects, phase whole-bridging circuit is electrically connected with load, power supply, and phase whole-bridging circuit includes transformer；This method comprises: controller is adopted
Collect the present operating voltage of load；Controller obtains voltage difference according to present operating voltage and a reference voltage；Controller root
Preset durations and input voltage when being powered every time according to voltage difference, transformer obtain frequency difference；Controller according to
Present operating voltage, reference voltage and frequency difference adjust the current frequency of control signal, to obtain newly controlling signal and export
To phase whole-bridging circuit, so as to phase whole-bridging circuit according to new control signal and input voltage by the present operating voltage of load
It is adjusted to reference voltage.As it can be seen that controller is worked as when the present operating voltage of load changes by adjusting control signal
Preceding frequency and do not change preset durations when transformer is powered every time, so adjust when transformer is powered it is default when continuing
Between duty ratio, in order to control load present operating voltage be equal to reference voltage so that phase whole-bridging circuit output work
Make that voltage is more stable, and then improves the reliability, power density and efficiency of phase whole-bridging circuit.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or equipment including the element.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.It should also be noted that similar label and letter exist
Similar terms are indicated in following attached drawing, therefore, once being defined in a certain Xiang Yi attached drawing, are then not required in subsequent attached drawing
It is further defined and explained.
Claims (10)
1. a kind of voltage control method, which is characterized in that be applied to power electronic equipment, the power electronic equipment includes control
Device, phase whole-bridging circuit, load and power supply, the controller is electrically connected with the phase whole-bridging circuit, the load, described
Phase whole-bridging circuit is electrically connected with the load, the power supply, and the power supply is used to provide to the phase whole-bridging circuit defeated
Enter voltage, the controller is used to export control signal to the phase whole-bridging circuit, and the phase whole-bridging circuit is used for basis
The control signal and the input voltage provide operating voltage for the load, and the phase whole-bridging circuit includes transformation
Device, which comprises
The controller acquires the present operating voltage of the load；
The controller obtains voltage difference according to the present operating voltage and a reference voltage；
Preset durations and the input when controller is powered every time according to the voltage difference, the transformer
Voltage obtains frequency difference；
The controller adjusts the control signal according to the present operating voltage, the reference voltage and the frequency difference
Current frequency, to obtain newly controlling signal and export to the phase whole-bridging circuit, so as to the phase whole-bridging circuit according to
The present operating voltage of the load is adjusted to the reference voltage by the new control signal and the input voltage.
2. voltage control method as described in claim 1, which is characterized in that the phase whole-bridging circuit include first switch,
Second switch, third switch and the 4th switch, the first switch are electrically connected with the second switch, third switch,
4th switch is switched and is electrically connected with the second switch, the third, the controller and the power supply respectively with institute
It states first switch, the second switch, third switch and the 4th switch to be electrically connected, the transformer includes primary
Coil, one end of the primary coil are electrically connected between the first switch and the second switch, the primary coil
The other end is electrically connected between the third switch and the 4th switch；The control signal includes first control signal,
Two control signals, third control signal and the 4th control signal, it is the first control signal, the second control signal, described
Third control signal and the 4th control signal are respectively used to control the first switch, the second switch, the third
Switch and the 4th switch, the controller is according to the present operating voltage, the reference voltage and the frequency difference
The current frequency of the control signal is adjusted, to obtain newly controlling the step of signal and output are to phase whole-bridging circuit packet
It includes:
The controller adjusts described first according to the present operating voltage, the reference voltage and the frequency difference respectively
The current frequency of signal, the second control signal, third control signal and the 4th control signal is controlled, to obtain
First new control signal, the second new control signal, third newly control signal and "four news" (new ideas control signal and are exported respectively to described
First switch, the second switch, third switch and the 4th switch.
3. voltage control method as claimed in claim 2, which is characterized in that the first control signal includes described first opening
The first initial turn-on time in a current switch periods is closed, the second control signal includes that the second switch exists
The second initial turn-on time in the switch periods, the third control signal include the third switch in the switch week
First in phase terminates turn-on time, and the 4th control signal includes second of the 4th switch in the switch periods
Terminate turn-on time；The controller is adjusted respectively according to the present operating voltage, the reference voltage and the frequency difference
Save the current of the first control signal, the second control signal, third control signal and the 4th control signal
Frequency newly controls signal and "four news" (new ideas control signal and difference to obtain the first new control signal, the second new control signal, third
It exports to the step of first switch, the second switch, third switch and the 4th switch and includes:
The controller obtains period difference according to the frequency difference；
The controller adjusts described first according to the present operating voltage, the reference voltage and the period difference respectively
Initial turn-on time and second initial turn-on time, and then adjust the first control signal and the second control signal
Current frequency, obtain the described first new control signal and the second new control signal, and according to the work at present electricity
When pressure, the reference voltage and the period difference adjust the first termination turn-on time and the second termination conducting respectively
Between, and then the current frequency of the third control signal and the 4th control signal is adjusted, it obtains the third and newly controls letter
Number and the "four news" (new ideas control signal.
4. voltage control method as claimed in claim 3, which is characterized in that the controller is according to the work at present electricity
When pressure, the reference voltage and the period difference adjust first initial turn-on time and second initial turn-on respectively
Between, and then the current frequency of the first control signal and the second control signal is adjusted, obtain the described first new control letter
Number and the described second new control signal, and according to the present operating voltage, the reference voltage and the period difference point
Described first is not adjusted and terminates turn-on time and the second termination turn-on time, and then adjusts the third control signal and institute
The current frequency for stating the 4th control signal obtains the step of third newly controls signal and "four news" (new ideas control signal packet
It includes:
The controller is when the present operating voltage is greater than the reference voltage, according to the period difference by described first
Initial turn-on time and second initial turn-on time shift to an earlier date, and then reduce the first control signal and second control
The current frequency of signal obtains the described first new control signal and the second new control signal, and according to the periodic inequality
Value described first will terminate turn-on time and described second and terminate turn-on time delay, so reduce third control signal with
The current frequency of the 4th control signal；
The controller is when the present operating voltage is less than the reference voltage, according to the period difference by described first
Initial turn-on time and second initial turn-on time delay, and then increase the first control signal and second control
The current frequency of signal obtains the described first new control signal and the second new control signal, and according to the periodic inequality
Value shifts to an earlier date the first termination turn-on time and the second termination turn-on time, so increase third control signal and
The current frequency of the 4th control signal.
5. voltage control method as described in claim 1, which is characterized in that the controller is according to the voltage difference, institute
It states preset durations when transformer is powered every time and the step of input voltage obtains frequency difference includes:
The controller is according to formulaCalculate the frequency difference, wherein Δ V0Indicate the voltage
Difference, Tuf indicate that the preset durations, Δ f indicate the frequency difference, U1The input voltage is indicated, described in a expression
The turn ratio of transformer.
6. a kind of voltage-operated device, which is characterized in that be applied to power electronic equipment, the power electronic equipment includes control
Device, phase whole-bridging circuit, load and power supply, the controller is electrically connected with the phase whole-bridging circuit, the load, described
Phase whole-bridging circuit is electrically connected with the load, the power supply, and the power supply is used to provide to the phase whole-bridging circuit defeated
Enter voltage, the controller is used to export control signal to the phase whole-bridging circuit, and the phase whole-bridging circuit is used for basis
The control signal and the input voltage provide operating voltage for the load, and the phase whole-bridging circuit includes transformation
Device, described device include:
Acquisition unit, for acquiring the present operating voltage of the load；
First computing unit, for obtaining voltage difference according to the present operating voltage and a reference voltage；
Second computing unit, preset durations when for being powered every time according to the voltage difference, the transformer and
The input voltage obtains frequency difference；
Frequency adjusts unit, for according to the adjusting of the present operating voltage, the reference voltage and the frequency difference
The current frequency of signal is controlled, to obtain newly controlling signal and export to the phase whole-bridging circuit, so as to the phase-shifting full-bridge
The present operating voltage of the load is adjusted to the reference according to the new control signal and the input voltage by circuit
Voltage.
7. voltage-operated device as claimed in claim 6, which is characterized in that the phase whole-bridging circuit include first switch,
Second switch, third switch and the 4th switch, the first switch are electrically connected with the second switch, third switch,
4th switch is switched and is electrically connected with the second switch, the third, the controller and the power supply respectively with institute
It states first switch, the second switch, third switch and the 4th switch to be electrically connected, the transformer includes primary
Coil, one end of the primary coil are electrically connected between the first switch and the second switch, the primary coil
The other end is electrically connected between the third switch and the 4th switch；The control signal includes first control signal,
Two control signals, third control signal and the 4th control signal, it is the first control signal, the second control signal, described
Third control signal and the 4th control signal are respectively used to control the first switch, the second switch, the third
Switch and the 4th switch；
The frequency adjusts unit for adjusting respectively according to the present operating voltage, the reference voltage and the frequency difference
Save the current of the first control signal, the second control signal, third control signal and the 4th control signal
Frequency newly controls signal and "four news" (new ideas control signal and difference to obtain the first new control signal, the second new control signal, third
Output to the first switch, the second switch, third switch and the described 4th switchs.
8. voltage-operated device as claimed in claim 7, which is characterized in that the first control signal includes described first opening
The first initial turn-on time in a current switch periods is closed, the second control signal includes that the second switch exists
The second initial turn-on time in the switch periods, the third control signal include the third switch in the switch week
First in phase terminates turn-on time, and the 4th control signal includes second of the 4th switch in the switch periods
Turn-on time is terminated, the frequency adjusts unit and includes:
Period computation subunit, for obtaining period difference according to the frequency difference；
Periodic adjustment subelement, for being adjusted respectively according to the present operating voltage, the reference voltage and the period difference
It saves first initial turn-on time and second initial turn-on time, and then adjusts the first control signal and described the
The current frequency of two control signals obtains the described first new control signal and the second new control signal, and according to described
Present operating voltage, the reference voltage and the period difference adjust described first respectively and terminate turn-on time and described second
Turn-on time is terminated, and then adjusts the current frequency of third control signal and the 4th control signal, obtains described the
Three new control signals and the "four news" (new ideas control signal.
9. voltage-operated device as claimed in claim 8, which is characterized in that the periodic adjustment subelement described for working as
When preceding operating voltage is greater than the reference voltage, according to the period difference by first initial turn-on time and described second
Initial turn-on time shifts to an earlier date, and then reduces the current frequency of the first control signal and the second control signal, obtains institute
When stating the first new control signal and the second new control signal, and first termination being connected according to the period difference
Between and described second terminate turn-on time delay, and then reduce the current of third control signal and the 4th control signal
Frequency；
The periodic adjustment subelement is also used to when the present operating voltage is less than the reference voltage, according to the period
First initial turn-on time and second initial turn-on time are delayed by difference, and then increase the first control signal
With the current frequency of the second control signal, the described first new control signal and the second new control signal are obtained, and
The first termination turn-on time and the second termination turn-on time are shifted to an earlier date according to the period difference, and then described in increase
Third controls the current frequency of signal and the 4th control signal.
10. voltage-operated device as claimed in claim 6, which is characterized in that second computing unit is according to formulaCalculate the frequency difference, wherein Δ V0Indicate that the voltage difference, Tuf indicate that described preset is held
Continuous time, Δ f indicate the frequency difference, U1Indicate that the input voltage, a indicate the turn ratio of the transformer.
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| CN201811038354.XA CN109004843B (en) | 2018-09-06 | 2018-09-06 | Voltage control method and device |
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| CN201811038354.XA CN109004843B (en) | 2018-09-06 | 2018-09-06 | Voltage control method and device |
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| CN112994573A (en) * | 2021-05-10 | 2021-06-18 | 江苏智马科技有限公司 | Servo motor voltage control method |
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