CN110212773A - High pressure generator voltage-switching method, device, computer equipment and storage medium - Google Patents
High pressure generator voltage-switching method, device, computer equipment and storage medium Download PDFInfo
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- CN110212773A CN110212773A CN201910500645.4A CN201910500645A CN110212773A CN 110212773 A CN110212773 A CN 110212773A CN 201910500645 A CN201910500645 A CN 201910500645A CN 110212773 A CN110212773 A CN 110212773A
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- high pressure
- pressure generator
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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
- H02M3/33507—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
- H02M3/33523—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 with galvanic isolation between input and output of both the power stage and the feedback loop
-
- 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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
This application involves a kind of high pressure generator voltage-switching method, device, computer equipment and storage mediums.The described method includes: obtaining the voltage modulated mode and voltage switching command of high pressure generator；According to the voltage modulated mode and voltage switching command, using segmentation feed-forward regulation modulation parameter corresponding with the voltage modulated mode to preset parameter value；If the high pressure generator completes voltage switching, stable state is maintained using pid control mode control voltage.Pass through the regulative mode of segmentation feedforward, modulation parameter corresponding with voltage modulated mode is directly adjusted to parameter preset, when can be realized being switched fast between high-low voltage, and can be avoided by simple pid control mode control, due to the voltage overshoot condition of the larger appearance of system inertia.
Description
Technical field
This application involves technical field of medical equipment, more particularly to a kind of high pressure generator voltage-switching method, device,
Computer equipment and storage medium.
Background technique
In recent years, X ray computer tomographic imaging (Computed Tomography, CT) is no matter in terms of basic fundamental,
Or huge development is all achieved in terms of new clinical application, has become the exciting diagnosis of the field of medical imaging
One of method.In CT, double energy imaging obtains substance by doing twice sweep to sweep object in different voltages energy level
Feature simultaneously reduces pseudomorphism.Wherein, based on the height kV energy imaging being switched fast have the advantages that simultaneously, it is homologous, in the same direction, be one
The very attractive energy imaging mode of kind.In the concrete realization, high pressure generator output voltage is in low energy kV (kVl, usually
Between 70~100kV) and high energy kV (kVh, usually 120~150kV) between be switched fast, a high energy kV and a low energy
The sum of duration of kV is generally only hundreds of μ s, and the low energy X ray and sigmatron issued irradiates after by object attenuation
To generate image on to the array of detector.
The current prior art is effectively adjusted output voltage by pid control mode, by comparing with reference to electricity
Pressure and the difference of actual feedback voltage achieve the purpose that control output voltage.It is needed in practical applications using above-mentioned control mode
Pid control parameter is constantly debugged according to circuit condition, meanwhile, when realizing the switching of height kV voltage according to simple PID
Control mode is often unable to reach most fast voltage switch speed or the biggish voltage of appearance since system inertia is larger
Overshoot.
Summary of the invention
Based on this, it is necessary to which in view of the above technical problems, voltage can be switched fast while avoid the occurrence of electricity by providing one kind
Press high pressure generator voltage-switching method, device, computer equipment and the storage medium of overshoot.
A kind of high pressure generator voltage-switching method, which comprises obtain the voltage modulated mode of high pressure generator
And voltage switching command；According to the voltage modulated mode and voltage switching command, using segmentation feed-forward regulation with it is described
The corresponding modulation parameter of voltage modulated mode is to preset parameter value；If the high pressure generator completes voltage switching, PID is utilized
Control mode controls voltage and maintains stable state.
The voltage modulated mode includes: variable pulse width modulating mode and Frequency modulation in one of the embodiments,
Mode；The voltage switching command includes: voltage switching climb command and voltage switching decline instruction.
It is described according to the voltage modulated mode and voltage switching command in one of the embodiments, using segmentation
If feed-forward regulation modulation parameter corresponding with the voltage modulated mode to preset parameter value includes: that the voltage modulated mode is
Variable pulse width modulating mode, and the voltage switching command is that voltage switches climb command；According to the variable pulse width modulating mode with
And voltage switches climb command, regulating switch pulse duty factor to the first parameter preset.
It is described according to the voltage modulated mode and voltage switching command in one of the embodiments, using segmentation
If feed-forward regulation modulation parameter corresponding with the voltage modulated mode to preset parameter value includes: that the voltage modulated mode is
Variable pulse width modulating mode, and the voltage switching command is voltage switching decline instruction；According to the variable pulse width modulating mode with
And voltage switching decline instruction, regulating switch pulse duty factor to the second parameter preset.
It is described according to the voltage modulated mode and voltage switching command in one of the embodiments, using segmentation
If feed-forward regulation modulation parameter corresponding with the voltage modulated mode to preset parameter value includes: that the voltage modulated mode is
Frequency modulating mode, and the voltage switching command is that voltage switches climb command；According to the Frequency modulating mode with
And voltage switches climb command, regulating switch pulse frequency to third parameter preset.
It is described according to the voltage modulated mode and voltage switching command in one of the embodiments, using segmentation
If feed-forward regulation modulation parameter corresponding with the voltage modulated mode to preset parameter value includes: that the voltage modulated mode is
Frequency modulating mode, and the voltage switching command is voltage switching decline instruction；According to the Frequency modulating mode with
And voltage switching decline instruction, stop driving switch pulse.
If it includes: to obtain high pressure that the high pressure generator, which completes voltage switching, in one of the embodiments,
The output voltage of device；When the voltage switching command is that voltage switches climb command, and the output voltage is more than or equal to first
The high voltage mode voltage of preset ratio, then the high pressure generator completes voltage switching；When the voltage switching command is electricity
Crush-cutting changes drop instruction, and the output voltage is less than or equal to the low voltage mode voltage of the second preset ratio, then the high pressure
Generator completes voltage switching.
A kind of high pressure generator voltage switching device, described device includes: acquisition module, for obtaining high pressure generator
Voltage modulated mode and voltage switching command；Adjustment module, for being referred to according to the voltage modulated mode and voltage switching
It enables, using segmentation feed-forward regulation modulation parameter corresponding with the voltage modulated mode to preset parameter value；Stable state maintenance module,
If completing voltage switching for the high pressure generator, stable state is maintained using pid control mode control voltage.
A kind of computer equipment, including memory and processor, the memory are stored with computer program, the processing
The step of device realizes any of the above-described kind of the method when executing the computer program.
A kind of computer readable storage medium, is stored thereon with computer program, and the computer program is held by processor
The step of method described in realizing any of the above-described kind when row.
Above-mentioned high pressure generator voltage-switching method, device, computer equipment and storage medium, by obtaining high pressure
The voltage modulated mode and voltage switching command of device, according to voltage modulated mode and voltage switching command, before segmentation
The mode of feedback adjusts modulation parameter corresponding with voltage modulated mode to parameter preset, when the switching of completion voltage and then utilizes
Pid control mode controls voltage and maintains stable state.It, directly will be corresponding with voltage modulated mode by the regulative mode of segmentation feedforward
Modulation parameter is adjusted to parameter preset, can be realized being switched fast between high-low voltage, and can be avoided by simple PID
When control mode controls, due to the voltage overshoot condition of the larger appearance of system inertia.
Detailed description of the invention
Fig. 1 is one embodiment mesohigh generator equivalent circuit diagram；
Fig. 2 is the voltage transformation figure of ideal high-low voltage switching in one embodiment；
Fig. 3 is univoltage ring PID control schematic diagram in one embodiment；
Fig. 4 is voltage and current double closed-loop PID control schematic diagram in one embodiment；
Fig. 5 is to increase the univoltage ring PID control schematic diagram after feedforward controller in one embodiment；
Fig. 6 is to increase the voltage and current double closed-loop PID control schematic diagram after feedforward controller in one embodiment；
Fig. 7 is that high-low voltage switched slow voltage transformation figure in one embodiment；
Fig. 8 is that the voltage transformation schematic diagram of overshoot occurs in high-low voltage switching in one embodiment；
Fig. 9 is the flow diagram of one embodiment mesohigh generator voltage-switching method；
Figure 10 is the stepwise schematic views that feedforward is segmented in one embodiment；
Figure 11 is one embodiment mesohigh generator voltage-switching method flow diagram；
Figure 12 is another embodiment mesohigh generator voltage-switching method flow diagram；
Figure 13 is another embodiment mesohigh generator voltage-switching method flow diagram；
Figure 14 is another embodiment mesohigh generator voltage-switching method flow diagram；
Figure 15 is the structural block diagram of one embodiment mesohigh generator voltage switching device；
Figure 16 is the internal structure chart of computer equipment in one embodiment.
Specific embodiment
It is with reference to the accompanying drawings and embodiments, right in order to which the objects, technical solutions and advantages of the application are more clearly understood
The application is further elaborated.It should be appreciated that specific embodiment described herein is only used to explain the application, not
For limiting the application.
Ct apparatus (CT) generally includes rack, scanning bed and for doctor's operation console.Rack
Side be provided with bulb, the side opposite with bulb is provided with detector.Console is that control bulb and detector carry out
The computer equipment of scanning, computer equipment is also used to the collected data of pick-up probe, and carries out processing reconstructed to data,
Ultimately form CT image.When being scanned using CT, patient is lain on scanning bed, by the scanning bed hole that patient is sent into rack
In diameter, the bulb being arranged in rack issues X-ray, and X-ray passes through patient and is received by a detector to form data, and data are transmitted
To computer equipment, computer equipment carries out preliminary treatment to data and image reconstruction obtains CT image.
Dual energy ct apparatus, can be using substance to the difference of the X-ray in different-energy level
Absorption characteristic analyzes material composition, to improve itself development capability to soft tissue, has very high clinical application valence
Value.The quick kilovolt of single source CT switches one kind as dual energy CT, relative to traditional double source CT with simultaneously, it is homologous,
The advantages that in the same direction is the dual-energy imaging method of function admirable.
Bulb and high pressure generator are the chief components of X-ray machine, x-ray CT.Alternating current of the high pressure generator input
Pressure increases hundreds times, then rectified, provides DC voltage required for generating x-ray for bulb.It is defeated that bulb receives high pressure generator
The voltage sent, and cathode filament is heated using voltage to generate thermoelectron, X is generated to the bombardment of anode disc using thermoelectron
Ray.Since the output power of high pressure generator is up to hundred kilowatts, along with thermoelectron can turn only less than 1% energy
X-ray sending is turned to, remaining is more than that 99% energy will be deposited on anode disc in a manner of thermal energy.
The equivalent schematic diagram of high pressure generator is as shown in Figure 1, generally resonant circuit structure, including the three-phase being sequentially connected
Uncontrollable rectifier unit, filter unit, inversion unit, high-tension transformer unit, high-voltage rectifying filter unit, high-voltage rectifying filtering are single
Member is connected to bulb load eventually by high voltage cable.It is defeated to control using variable pulse width modulation (PWM) or Frequency modulation PFM mode
Voltage out.Variable pulse width modulation (PWM), controlled resonant converter are connected with fixed switching frequency by adjusting bridge inverter main circuit switching tube
Duty ratio adjust output voltage；Frequency modulates PFM, and controlled resonant converter is opened by control bridge inverter main circuit switching tube
Frequency is closed to adjust output voltage.Wherein, it is as shown in Figure 2 to be preferably switched fast voltage.
In the dual energy ct apparatus being switched fast based on high and low energy step voltage, high pressure generator it is defeated
Voltage must be switched over quickly between low-voltage and high voltage as far as possible out, to reinforce low-lying level and high level imaging
Power spectrum discrimination in the process, to obtain better substance separating capacity.However limited by circuit power factor, low energy step voltage and
High energy step voltage is there are certain transit time during switching, and a low energy step voltage and high energy step voltage continue
The sum of time is generally only hundreds of microseconds, in order to guarantee the quality of image, the handoff procedure of low energy step voltage and high energy step voltage
Should be short as much as possible, and should ensure that the smooth of output voltage waveforms and stablize.On the other hand, dual energy computed tomography
The high pressure generator of equipment needs to meet the operation demand under wide scope load current conditions, this just further increases low energy
The control difficulty of step voltage and high energy step voltage handoff procedure.
In the prior art, as seen in figures 3-6, Fig. 3 is univoltage ring PID control schematic diagram in one embodiment, Fig. 4 mono-
Voltage and current double closed-loop PID control schematic diagram in a embodiment, Fig. 5 are single electricity after increasing feedforward controller in one embodiment
Pressure ring PID control schematic diagram, Fig. 6 are that the voltage and current double closed-loop PID control after increasing feedforward controller in one embodiment is shown
It is intended to.Wherein univoltage ring pid control mode reaches control output by comparing the difference of reference voltage and actual feedback voltage
Output voltage can be realized in low energy voltage and high energy electricity in the purpose of voltage after setting square wave for output voltage reference waveform
Switching between pressure.Voltage and current double closed-loop pid control mode is addition cavity current on the basis of univoltage outer ring
Current inner loop control, so as to improve the control characteristic of converter.In order to further improve the control performance of converter, actually answer
High pressure generator is also possible to can be in above-mentioned univoltage ring pid control mode and voltage and current double closed-loop pid control mode
On the basis of, increase feedforward control link, as shown in figs.5 and 6.Wherein feedforward controller directly calculates defeated according to reference quantity
Modulation voltage is applied to converter out, compared to feedback control, due to being not necessarily to work again after output and reference quantity generate error,
Improve the response speed of system.But due to the mathematical models for lacking resonance circuit and high-voltage rectifying part, in reality
It needs constantly to debug pid control parameter according to circuit condition using above-mentioned control mode in, and is realizing height energy level
Often since the inertia of system is larger when voltage is converted, and it is unable to reach most fast voltage switch speed or biggish electricity occurs
Press overshoot.As shown in Figure 7 and Figure 8, Fig. 7 is that high-low voltage switched slow voltage transformation figure, Fig. 8 mono- in one embodiment
There is the voltage transformation schematic diagram of overshoot in high-low voltage switching in a embodiment.
In one embodiment, as shown in figure 9, providing a kind of high pressure generator voltage-switching method, including following step
It is rapid:
Step S102 obtains the voltage modulated mode and voltage switching command of high pressure generator.
Specifically, high pressure generator voltage-switching method can be applied to the dual intensity of dual energy ct apparatus
Imaging, additionally it is possible to the switching applied to voltage in power pulser, additionally it is possible to it is defeated to be applied to modulator in radiotherapy apparatus
The scenes such as rapid increase decline of high pressure out.In the present embodiment be applied to dual energy ct apparatus dual intensity at
It is illustrated as.Dual energy ct apparatus carry out dual-energy imaging during, dual energy computer
The central controller of tomographic apparatus needs to carry out data communication, that is, dual energy with the central controller of high pressure generator
Ct apparatus can issue voltage switching command to high pressure generator, and wherein voltage switching command includes: that voltage is cut
Change climb command and voltage switching decline instruction.Voltage switches climb command, switches high pressure generator by low energy step voltage
To high level voltage；Voltage switching decline instruction, makes high pressure generator switch to low energy step voltage by high energy step voltage.Voltage tune
Molding formula includes: variable pulse width modulating mode PWM and Frequency modulating mode PFM.In high pressure generator, output voltage it is big
It is small not only related to duty cycle of switching but also directly related with switching frequency.More specifically, the fixed switch of variable pulse width modulating mode PWM
Frequency adjusts output voltage by adjusting duty ratio.Frequency modulating mode PFM fixed duty cycle passes through regulating switch frequency
Rate adjusts output voltage.
Step S104, according to the voltage modulated mode and voltage switching command, using segmentation feed-forward regulation with it is described
The corresponding modulation parameter of voltage modulated mode is to preset parameter value.
Specifically, the voltage-switching method of the present embodiment is in variable pulse width modulating mode PWM and Frequency modulating mode PFM
In control theory it is identical, namely segmentation feedforward control, under different voltage modulated modes, by controlling corresponding parameter,
To achieve the purpose that control output voltage.At variable pulse width modulating mode PWM, fixed switching frequency, by being segmented feedforward side
Formula adjusts duty ratio to preset parameter value, achievees the purpose that adjust output voltage；At Frequency modulating mode PFM, fixation is accounted for
Empty ratio achievees the purpose that adjust output voltage by segmentation feed-forward mode regulating switch frequency to preset parameter value.Namely exist
Modulation parameter is duty ratio in variable pulse width modulating mode PWM；Modulation parameter is switching frequency in Frequency modulating mode PFM.
Wherein parameter preset is specifically to be set according to actual use situation.Parameter preset is to open in variable pulse width modulating mode PWM
Close the value of pulse duty factor；Parameter preset is the value of switching pulse frequency in Frequency modulating mode PFM.
Step S106 remains steady using pid control mode control voltage if the high pressure generator completes voltage switching
State.
Specifically, the output voltage for obtaining high pressure generator, when the voltage switching command be voltage switch climb command,
And the output voltage is more than or equal to the high voltage mode voltage of the first preset ratio, then the high pressure generator completion voltage is cut
It changes；When the voltage switching command is that voltage switching decline instructs, and the output voltage is less than or equal to the second preset ratio
Low voltage mode voltage, then the high pressure generator completes voltage switching.More specifically, high level is switched in low energy step voltage
When voltage, when output voltage be higher than high voltage mode voltage 90%, be also possible to other preset ratios, it is determined that completed
The conversion of the supreme energy step voltage of low energy step voltage；When high energy step voltage switches to low energy step voltage, when output voltage is lower than low
The 110% of voltage mode voltage is also possible to other preset ratios, it is determined that has completed high energy step voltage to low energy step voltage
Conversion.After completing voltage switching, voltage is controlled by pid control mode and maintains stable state.Wherein pid control mode packet
It includes: univoltage ring pid control mode and voltage and current double closed-loop pid control mode.Pid control mode is exactly according to output electricity
Pressure just adjusts relevant parameter (duty ratio or switching frequency) reduction output voltage when output voltage is higher than predetermined value, when output electricity
It forces down and just adjusts relevant parameter (duty ratio or switching frequency) increase output voltage in predetermined value, eventually enter into dynamic equilibrium shape
State.
Above-mentioned high pressure generator voltage-switching method is cut by the voltage modulated mode and voltage that obtain high pressure generator
Instruction is changed, according to voltage modulated mode and voltage switching command, is adjusted and voltage modulated mode in the way of segmentation feedforward
Corresponding modulation parameter is maintained surely to parameter preset when the switching of completion voltage and then using pid control mode control voltage
State.By the regulative mode of segmentation feedforward, modulation parameter corresponding with voltage modulated mode is directly adjusted to parameter preset, energy
When enough realizing being switched fast between high-low voltage, and can be avoided by simple pid control mode control, since system is used
The voltage overshoot condition of the larger appearance of property.
If the voltage modulated mode is variable pulse width modulating mode in one of the embodiments, and the voltage switches
Instruction is that voltage switches climb command；Switch climb command, regulating switch arteries and veins according to the variable pulse width modulating mode and voltage
Duty ratio is rushed to the first parameter preset.
Specifically, under variable pulse width modulating mode, when low energy step voltage is switched to high energy step voltage, in voltage raised bench
Section regulating switch pulse duty factor is to the first parameter preset, wherein the first parameter preset is to switch arteries and veins required for high energy step voltage
Rush duty ratio.
If the voltage modulated mode is variable pulse width modulating mode in one of the embodiments, and the voltage switches
Instruction is voltage switching decline instruction；According to the variable pulse width modulating mode and voltage switching decline instruction, regulating switch arteries and veins
Duty ratio is rushed to the second parameter preset.
Specifically, under variable pulse width modulating mode, when high energy step voltage is switched to low energy step voltage, depression of order under voltage
Section regulating switch pulse duty factor is to the second parameter preset, wherein the second parameter preset is to switch arteries and veins required for low energy step voltage
Rush duty ratio.
If the voltage modulated mode is Frequency modulating mode in one of the embodiments, and the voltage switches
Instruction is that voltage switches climb command；Switch climb command, regulating switch arteries and veins according to the Frequency modulating mode and voltage
Frequency is rushed to third parameter preset.
Specifically, under Frequency modulating mode, when low energy step voltage is switched to high energy step voltage, in voltage raised bench
Section regulating switch pulse frequency is to third parameter preset, and wherein third parameter preset is switching pulse required for high energy step voltage
Frequency.
If the voltage modulated mode is Frequency modulating mode in one of the embodiments, and the voltage switches
Instruction is voltage switching decline instruction；According to the Frequency modulating mode and voltage switching decline instruction, stops driving and open
Guan pulse punching.
Specifically, under Frequency modulating mode, when high energy step voltage is switched to low energy step voltage, depression of order under voltage
Section stops driving switch pulse.
In one of the embodiments, as shown in Figure 10, Figure 10 is the stepwise schematic views that feedforward is segmented in one embodiment.
The high and low energy step voltage handoff procedure of dual energy ct apparatus is divided into four-stage: the stage 1 is low energy step voltage
Switch to the voltage ascent stage of high energy step voltage；Stage 2 is the platform phase of high energy step voltage；Stage 3 is high energy step voltage
Switch to the voltage decline stage of low energy step voltage；Stage 4 is the platform phase of low energy step voltage.
In one of the embodiments, as shown in figure 11, Figure 11 is one embodiment mesohigh generator voltage switching side
Method.It is illustrated by taking variable pulse width modulation (PWM) and univoltage ring PID control as an example in the present embodiment.Controlled resonant converter is
Variable pulse width modulation (PWM) mode judges whether to receive voltage switching climb command in 1 voltage ascent stage of stage, if receiving
Voltage switches climb command, the mutation of switching pulse duty ratio, that is, regulating switch pulse duty factor is to the first parameter preset, defeated
Voltage rapid increase out.Judge whether voltage ascent stage terminates, if output voltage is higher than the 90% of high voltage mode voltage,
It can be other preset ratios, it is determined that completed the conversion of the supreme energy step voltage of low energy step voltage.List is utilized into the stage 2
Voltage loop PID control voltage maintains stable state, and output voltage is made to enter high energy step voltage stable state.Sentence in the 3 voltage decline stage of stage
It is disconnected whether to receive voltage switching decline instruction, if receiving voltage switching decline instruction, the mutation of switching pulse duty ratio, also
It is regulating switch pulse duty factor to the second parameter preset, output voltage rapid decrease.Preferred second parameter preset is zero.Sentence
Whether the power-off drops stage terminates, if output voltage is lower than the 110% of low voltage mode voltage, is also possible to other default ratios
Example, it is determined that completed the conversion of high energy step voltage to low energy step voltage.Univoltage ring PID control electricity is utilized into the stage 4
Pressure maintains stable state, and output voltage is made to enter low energy step voltage stable state.Wherein, univoltage ring PID control may be to increase feedforward
The univoltage ring PID control of controller.
In one of the embodiments, as shown in figure 12, Figure 12 is one embodiment mesohigh generator voltage switching side
Method.It is illustrated by taking variable pulse width modulation (PWM) and voltage and current double closed-loop PID control as an example in the present embodiment.Resonance becomes
Parallel operation is variable pulse width modulation (PWM) mode, judges whether to receive voltage switching climb command in 1 voltage ascent stage of stage, if
Voltage switching climb command, the mutation of switching pulse duty ratio, that is, regulating switch pulse duty factor are received to first default
Parameter, output voltage rapid increase.Judge whether voltage ascent stage terminates, if output voltage is higher than high voltage mode voltage
90%, it is also possible to other preset ratios, it is determined that completed the conversion of the supreme energy step voltage of low energy step voltage.Into the stage
2 maintain stable state using voltage and current double closed-loop PID control voltage, and output voltage is made to enter high energy step voltage stable state.In 3 electricity of stage
The drops stage judges whether to receive voltage switching decline instruction, if receiving voltage switching decline instruction, switching pulse is accounted for
Sky is than mutation, that is, regulating switch pulse duty factor is to the second parameter preset, output voltage rapid decrease.Preferred second is pre-
Setting parameter is zero.Judge whether the voltage decline stage terminates, it, can also if output voltage is lower than the 110% of low voltage mode voltage
To be other preset ratios, it is determined that completed the conversion of high energy step voltage to low energy step voltage.Voltage is utilized into the stage 4
Current double closed-loop PID control voltage maintains stable state, and output voltage is made to enter low energy step voltage stable state.Wherein, voltage and current is double closes
Ring PID control may be to increase the voltage and current double closed-loop PID control of feedforward controller.
In one of the embodiments, as shown in figure 13, Figure 13 is one embodiment mesohigh generator voltage switching side
Method.It is illustrated by taking Frequency modulating mode PFM and univoltage ring PID control as an example in the present embodiment.Resonant transformation
Device is Frequency modulating mode PFM, judges whether to receive voltage switching climb command in 1 voltage ascent stage of stage, if connecing
Voltage switching climb command, switching pulse frequency discontinuity are received, that is, regulating switch pulse frequency is to third parameter preset, it is defeated
Voltage rapid increase out.Judge whether voltage ascent stage terminates, if output voltage is higher than the 90% of high voltage mode voltage,
It can be other preset ratios, it is determined that completed the conversion of the supreme energy step voltage of low energy step voltage.List is utilized into the stage 2
Voltage loop PID control voltage maintains stable state, and output voltage is made to enter high energy step voltage stable state.Sentence in the 3 voltage decline stage of stage
It is disconnected whether to receive voltage switching decline instruction, if receiving voltage switching decline instruction, turn off all switching tubes of inverter circuit
Driving pulse, output voltage rapid decrease.Judge whether the voltage decline stage terminates, if output voltage is lower than low voltage mode
The 110% of voltage is also possible to other preset ratios, it is determined that has completed the conversion of high energy step voltage to low energy step voltage.
Stable state is maintained using univoltage ring PID control voltage into the stage 4, output voltage is made to enter low energy step voltage stable state.Wherein, single
Voltage loop PID control may be to increase the univoltage ring PID control of feedforward controller.
In one of the embodiments, as shown in figure 14, Figure 14 is one embodiment mesohigh generator voltage switching side
Method.It is illustrated by taking Frequency modulating mode PFM and voltage and current double closed-loop PID control as an example in the present embodiment.It is humorous
Vibration converter is Frequency modulating mode PFM, judges whether that receiving voltage switching rising refers in 1 voltage ascent stage of stage
It enables, if it is default to third to receive voltage switching climb command, switching pulse frequency discontinuity, that is, regulating switch pulse frequency
Parameter, output voltage rapid increase.Judge whether voltage ascent stage terminates, if output voltage is higher than high voltage mode voltage
90%, it is also possible to other preset ratios, it is determined that completed the conversion of the supreme energy step voltage of low energy step voltage.Into the stage
2 maintain stable state using voltage and current double closed-loop PID control voltage, and output voltage is made to enter high energy step voltage stable state.In 3 electricity of stage
The drops stage judges whether to receive voltage switching decline instruction, if receiving voltage switching decline instruction, shutdown inversion electricity
The driving pulse of all switching tubes in road, output voltage rapid decrease.Judge whether the voltage decline stage terminates, if output voltage is low
In the 110% of low voltage mode voltage, it is also possible to other preset ratios, it is determined that completed high energy step voltage to low-lying level
The conversion of voltage.Stable state is maintained using voltage and current double closed-loop PID control voltage into the stage 4, output voltage is made to enter low energy
Step voltage stable state.Wherein, voltage and current double closed-loop PID control may be the voltage and current double closed-loop for increasing feedforward controller
PID control.
It should be understood that although each step in the flow chart of Fig. 9 is successively shown according to the instruction of arrow, this
A little steps are not that the inevitable sequence according to arrow instruction successively executes.Unless expressly state otherwise herein, these steps
It executes there is no the limitation of stringent sequence, these steps can execute in other order.Moreover, at least part in Fig. 9
Step may include that perhaps these sub-steps of multiple stages or stage are executed in synchronization to multiple sub-steps
It completes, but can execute at different times, the execution sequence in these sub-steps or stage, which is also not necessarily, successively to be carried out,
But it can be executed in turn or alternately at least part of the sub-step or stage of other steps or other steps.
In one embodiment, as shown in figure 15, a kind of high pressure generator voltage switching device is provided, comprising: obtain
Module 100, adjustment module 200 and stable state maintenance module 300, in which:
Module 100 is obtained, for obtaining the voltage modulated mode and voltage switching command of high pressure generator.
Adjustment module 200 is used for according to the voltage modulated mode and voltage switching command, using segmentation feed-forward regulation
Modulation parameter corresponding with the voltage modulated mode is to preset parameter value.
Stable state maintenance module 300 utilizes pid control mode control if completing voltage switching for the high pressure generator
Voltage processed maintains stable state.
Adjustment module 200 is also used to according to the variable pulse width modulating mode and voltage switching climb command, regulating switch
Pulse duty factor is to the first parameter preset.
Adjustment module 200 is also used to according to the variable pulse width modulating mode and voltage switching decline instruction, regulating switch
Pulse duty factor is to the second parameter preset.
Adjustment module 200 is also used to according to the Frequency modulating mode and voltage switching climb command, regulating switch
Pulse frequency is to third parameter preset.
Adjustment module 200 is also used to stop driving according to the Frequency modulating mode and voltage switching decline instruction
Switching pulse.
Stable state maintenance module 300 is also used to obtain the output voltage of high pressure generator；When the voltage switching command is electricity
Crush-cutting changes climb command, and the output voltage is more than or equal to the high voltage mode voltage of the first preset ratio, then the high pressure
Generator completes voltage switching；When the voltage switching command be voltage switching decline instruction, and the output voltage be less than etc.
In the low voltage mode voltage of the second preset ratio, then the high pressure generator completes voltage switching.
Specific restriction about high pressure generator voltage switching device may refer to above for high pressure generator voltage
The restriction of switching method, details are not described herein.Modules in above-mentioned high pressure generator voltage switching device can whole or portion
Divide and is realized by software, hardware and combinations thereof.Above-mentioned each module can be embedded in the form of hardware or independently of computer equipment
In processor in, can also be stored in a software form in the memory in computer equipment, in order to processor calling hold
The corresponding operation of the above modules of row.
In one embodiment, a kind of computer equipment is provided, which can be terminal, internal structure
Figure can be as shown in figure 16.The computer equipment includes the processor connected by system bus, memory, network interface, shows
Display screen and input unit.Wherein, the processor of the computer equipment is for providing calculating and control ability.The computer equipment
Memory includes non-volatile memory medium, built-in storage.The non-volatile memory medium is stored with operating system and computer
Program.The built-in storage provides environment for the operation of operating system and computer program in non-volatile memory medium.The meter
The network interface for calculating machine equipment is used to communicate with external terminal by network connection.When the computer program is executed by processor
To realize a kind of high pressure generator voltage-switching method.The display screen of the computer equipment can be liquid crystal display or electronics
Ink display screen, the input unit of the computer equipment can be the touch layer covered on display screen, are also possible to computer and set
Key, trace ball or the Trackpad being arranged on standby shell, can also be external keyboard, Trackpad or mouse etc..
It will be understood by those skilled in the art that structure shown in Figure 16, only part relevant to application scheme
The block diagram of structure, does not constitute the restriction for the computer equipment being applied thereon to application scheme, and specific computer is set
Standby may include perhaps combining certain components or with different component layouts than more or fewer components as shown in the figure.
In one embodiment, a kind of computer equipment, including memory and processor are provided, is stored in memory
Computer program, the processor perform the steps of when executing computer program
Obtain the voltage modulated mode and voltage switching command of high pressure generator；According to the voltage modulated mode and
Voltage switching command, using segmentation feed-forward regulation modulation parameter corresponding with the voltage modulated mode to preset parameter value；If
The high pressure generator completes voltage switching, then maintains stable state using pid control mode control voltage.
In one embodiment, it is also performed the steps of when processor executes computer program
Switch climb command according to the variable pulse width modulating mode and voltage, regulating switch pulse duty factor to first is in advance
Setting parameter.
In one embodiment, it is also performed the steps of when processor executes computer program
According to the variable pulse width modulating mode and voltage switching decline instruction, regulating switch pulse duty factor to second is in advance
Setting parameter.
In one embodiment, it is also performed the steps of when processor executes computer program
Switch climb command according to the Frequency modulating mode and voltage, regulating switch pulse frequency is default to third
Parameter.
In one embodiment, it is also performed the steps of when processor executes computer program
According to the Frequency modulating mode and voltage switching decline instruction, stop driving switch pulse.
In one embodiment, it is also performed the steps of when processor executes computer program
Obtain the output voltage of high pressure generator；It is and described when the voltage switching command is that voltage switches climb command
Output voltage is more than or equal to the high voltage mode voltage of the first preset ratio, then the high pressure generator completes voltage switching；When
The voltage switching command is voltage switching decline instruction, and the output voltage is less than or equal to the low-voltage of the second preset ratio
Mode voltage, then the high pressure generator completes voltage switching.
In one embodiment, a kind of computer readable storage medium is provided, computer program is stored thereon with, is calculated
Machine program performs the steps of when being executed by processor
Obtain the voltage modulated mode and voltage switching command of high pressure generator；According to the voltage modulated mode and
Voltage switching command, using segmentation feed-forward regulation modulation parameter corresponding with the voltage modulated mode to preset parameter value；If
The high pressure generator completes voltage switching, then maintains stable state using pid control mode control voltage.
In one embodiment, it is also performed the steps of when computer program is executed by processor
Switch climb command according to the variable pulse width modulating mode and voltage, regulating switch pulse duty factor to first is in advance
Setting parameter.
In one embodiment, it is also performed the steps of when computer program is executed by processor
According to the variable pulse width modulating mode and voltage switching decline instruction, regulating switch pulse duty factor to second is in advance
Setting parameter.
In one embodiment, it is also performed the steps of when computer program is executed by processor
Switch climb command according to the Frequency modulating mode and voltage, regulating switch pulse frequency is default to third
Parameter.
In one embodiment, it is also performed the steps of when computer program is executed by processor
According to the Frequency modulating mode and voltage switching decline instruction, stop driving switch pulse.
In one embodiment, it is also performed the steps of when computer program is executed by processor
Obtain the output voltage of high pressure generator；It is and described when the voltage switching command is that voltage switches climb command
Output voltage is more than or equal to the high voltage mode voltage of the first preset ratio, then the high pressure generator completes voltage switching；When
The voltage switching command is voltage switching decline instruction, and the output voltage is less than or equal to the low-voltage of the second preset ratio
Mode voltage, then the high pressure generator completes voltage switching.
Those of ordinary skill in the art will appreciate that realizing all or part of the process in above-described embodiment method, being can be with
Relevant hardware is instructed to complete by computer program, the computer program can be stored in a non-volatile computer
In read/write memory medium, the computer program is when being executed, it may include such as the process of the embodiment of above-mentioned each method.Wherein,
To any reference of memory, storage, database or other media used in each embodiment provided herein,
Including non-volatile and/or volatile memory.Nonvolatile memory may include read-only memory (ROM), programming ROM
(PROM), electrically programmable ROM (EPROM), electrically erasable ROM (EEPROM) or flash memory.Volatile memory may include
Random access memory (RAM) or external cache.By way of illustration and not limitation, RAM is available in many forms,
Such as static state RAM (SRAM), dynamic ram (DRAM), synchronous dram (SDRAM), double data rate sdram (DDRSDRAM), enhancing
Type SDRAM (ESDRAM), synchronization link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM
(RDRAM), direct memory bus dynamic ram (DRDRAM) and memory bus dynamic ram (RDRAM) etc..
Each technical characteristic of above embodiments can be combined arbitrarily, for simplicity of description, not to above-described embodiment
In each technical characteristic it is all possible combination be all described, as long as however, the combination of these technical characteristics be not present lance
Shield all should be considered as described in this specification.
The several embodiments of the application above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the concept of this application, various modifications and improvements can be made, these belong to the protection of the application
Range.Therefore, the scope of protection shall be subject to the appended claims for the application patent.
Claims (10)
1. a kind of high pressure generator voltage-switching method, which is characterized in that the described method includes:
Obtain the voltage modulated mode and voltage switching command of high pressure generator；
According to the voltage modulated mode and voltage switching command, using segmentation feed-forward regulation and the voltage modulated mode phase
The modulation parameter answered is to preset parameter value；
If the high pressure generator completes voltage switching, stable state is maintained using pid control mode control voltage.
2. the method according to claim 1, wherein
The voltage modulated mode includes: variable pulse width modulating mode and Frequency modulating mode；
The voltage switching command includes: voltage switching climb command and voltage switching decline instruction.
3. according to the method described in claim 2, it is characterized in that, described switch according to the voltage modulated mode and voltage
Instruction, if including: described using feed-forward regulation modulation parameter corresponding with the voltage modulated mode is segmented to preset parameter value
Voltage modulated mode is variable pulse width modulating mode, and the voltage switching command is that voltage switches climb command；
Switch climb command, regulating switch pulse duty factor to the first default ginseng according to the variable pulse width modulating mode and voltage
Number.
4. according to the method described in claim 2, it is characterized in that, described switch according to the voltage modulated mode and voltage
Instruction, if including: described using feed-forward regulation modulation parameter corresponding with the voltage modulated mode is segmented to preset parameter value
Voltage modulated mode is variable pulse width modulating mode, and the voltage switching command is voltage switching decline instruction；
According to the variable pulse width modulating mode and voltage switching decline instruction, regulating switch pulse duty factor to the second default ginseng
Number.
5. according to the method described in claim 2, it is characterized in that, described switch according to the voltage modulated mode and voltage
Instruction, if including: described using feed-forward regulation modulation parameter corresponding with the voltage modulated mode is segmented to preset parameter value
Voltage modulated mode is Frequency modulating mode, and the voltage switching command is that voltage switches climb command；
Switch climb command, regulating switch pulse frequency to the default ginseng of third according to the Frequency modulating mode and voltage
Number.
6. according to the method described in claim 2, it is characterized in that, described switch according to the voltage modulated mode and voltage
Instruction, if including: described using feed-forward regulation modulation parameter corresponding with the voltage modulated mode is segmented to preset parameter value
Voltage modulated mode is Frequency modulating mode, and the voltage switching command is voltage switching decline instruction；
According to the Frequency modulating mode and voltage switching decline instruction, stop driving switch pulse.
7. if according to the method described in claim 2, it is characterized in that, the high pressure generator completes voltage switching packet
It includes:
Obtain the output voltage of high pressure generator；
When the voltage switching command is that voltage switches climb command, and the output voltage is more than or equal to the first preset ratio
High voltage mode voltage, then the high pressure generator completes voltage switching；
When the voltage switching command is that voltage switching decline instructs, and the output voltage is less than or equal to the second preset ratio
Low voltage mode voltage, then the high pressure generator completes voltage switching.
8. a kind of high pressure generator voltage switching device, which is characterized in that described device includes:
Module is obtained, for obtaining the voltage modulated mode and voltage switching command of high pressure generator；
Adjustment module, for according to the voltage modulated mode and voltage switching command, using segmentation feed-forward regulation with it is described
The corresponding modulation parameter of voltage modulated mode is to preset parameter value；
Stable state maintenance module is tieed up if completing voltage switching for the high pressure generator using pid control mode control voltage
Keep steady state.
9. a kind of computer equipment, including memory and processor, the memory are stored with computer program, feature exists
In the step of processor realizes any one of claims 1 to 7 the method when executing the computer program.
10. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that the computer program
The step of method described in any one of claims 1 to 7 is realized when being executed by processor.
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| CN201910500645.4A CN110212773B (en) | 2019-06-11 | 2019-06-11 | Voltage switching method and device for high-voltage generator, computer equipment and storage medium |
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