CN107786098A - Multi-stage power transformation system and its control method - Google Patents
Multi-stage power transformation system and its control method Download PDFInfo
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- CN107786098A CN107786098A CN201610757102.7A CN201610757102A CN107786098A CN 107786098 A CN107786098 A CN 107786098A CN 201610757102 A CN201610757102 A CN 201610757102A CN 107786098 A CN107786098 A CN 107786098A
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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
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
- H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
- H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
- H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
- H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
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Abstract
The invention discloses a kind of multi-stage power side pressure system and its control method, it is characterized in that including power supply unit, transverter portion, multistage current transformer portion, crest voltage suppressing portion and load, the multistage current transformer portion receives the three-phase voltage from power supply unit access, is converted to DC voltage and exports；The crest voltage suppressing portion is arranged in parallel between the multistage current transformer portion and the load, resistance in parallel is formed between the multistage current transformer portion and load, being minimized of crest voltage that will occur when exporting to the sense of current of the load and changing.Crest voltage can be controlled to prevent the multi-stage power transformation system burnt of the insulated gate bipolar transistor inside current transformer and its control method the invention provides a kind of.
Description
Technical field
The present invention relates to a kind of multi-stage power transformation system and its control method, and height can be produced by relating more specifically to one kind
The multi-stage power transformation system and its control method of voltage and high-frequency electric power.
Background technology
In general, the power transformer device of industrial ozone generator, in order to manufacture high voltage, connects in conventional power supply
Enter transformer or low frequency current transformer and transformer to produce high voltage.But there are the following problems：Because of conventional power supply or low frequency
The frequency of current transformer is fixed and relatively low, thus, greatly limits ozone generating capacity.Because the material manufacture for the ozone discharge tube having is
Electrode is produced by applying metallisation on current glass pipe, thus accesses frequency to need to be maintained at below 1kHz, but discharge tube
If electrode be changed to earthenware, it is necessary to several ~ 10kHz or so frequency, while resonance can be reduced with anti-by improving frequency
Answer the capacity and size of device.But in order to manufacture high voltage to improve the voltage of transformer, so as to play reduction ozone discharge tube
The way of dielectric strength not only reduce efficiency, and the cost of input is improved, thus, it is desirable to which one kind can either meet that ozone is put
The characteristic of fulgurite has the power transformer device of high-efficiency and low-cost again.
Fig. 1 is the brief configuration figure of the high-frequency multi-stage power transformation system of prior art.Reference picture 1, prior art
Multi-stage power transformation system includes：Power supply, transverter portion, multistage current transformer portion.Multi-stage power transformation system with the structure
Access is adapted to load.Power supply is to multistage transverter portion supply electric power；Transverter portion receives the alternating voltage from plant-grid connection, conversion
Exported for DC voltage；Multistage current transformer portion receives the DC voltage from the output of transverter portion, is converted to single-phase high-frequency
Alternating voltage, then output to load is ozone generator.
For Fig. 2 to the circuit diagram of the electric current flowing of Fig. 7 display system operational modes, Fig. 8 is that the system of display output voltage is transported
The electric current and voltage plot of row mode.
Reference picture 2 is to Fig. 8, and when being changed to MODE1 from MODE4, when being changed to MODE3 from MODE2, sense of current is from exhausted
The master switch of edge grid bipolar transistor is converted to fly-wheel diode passage, and produces high crest voltage (spike
voltage).The phenomenon does not occur in the common current transformer, but the phenomenon occurred under single-phase resonant load mode；Be it is a kind of with
The phenomenon the change in polarity of electric current and changed；The phase difference of voltage and current is not in when being slow phase, only in voltage and electricity
The phase difference of stream is with mutually or when entering phase occurring, i.e. occurs under the zero-voltage state of no-voltage, during the change in polarity of electric current,
But the section of electric current does not occur under direct current connection, i.e., occurs in each insulated gate bipolar transistor during current cycle.Peak
Threshold voltage (spike voltage) refers to, electric current unidirectionally flow to the other end from one end of element and electric current slowly reverse flow
When, respectively by the larger situation in one end of element and the voltage difference of the other end, when being two-stage, the voltage is under normal circumstances only
Produce in the range of the internal pressure of the insulated gate bipolar transistor used, not over the specified electricity of insulated gate bipolar transistor
Pressure, but in the case of multistage, another grade of voltage together increases, and crest voltage occurs to exceed rated voltage itself, thus, makes
Obtain element to damage, in multi-stage power transformation system, exceed insulated gate bipolar transistor (insulated because producing
Gate bipolar mode transistor) internal pressure crest voltage, and burning for insulated gate bipolar transistor be present
And output voltage it is impacted the problem of.Therefore, it is necessary to develop multi-stage power transformation system so that in the zero-voltage state of no-voltage
The lower polarity chron peak value for changing electric current can be inhibited.
The content of the invention
In view of the shortcomings of the prior art, the invention provides a kind of multi-stage power transformation system and its control method.
To achieve the above object, the invention provides following technical scheme：Including power supply unit, transverter portion, multistage unsteady flow
Device portion, crest voltage suppressing portion and load, the multistage current transformer portion receive the three-phase voltage from power supply unit access, are converted to straight
Stream voltage simultaneously exports；The crest voltage suppressing portion is arranged between the multistage current transformer portion and the load, described more
Resistance in parallel is formed between level current transformer portion and load, by what is occurred when exporting to the sense of current of the load and changing
Being minimized of crest voltage.
Preferably, in addition to transformer portion, the transformer portion are arranged in parallel between multistage current transformer portion and load, connect
The power in the multistage current transformer portion inputted is received, high voltage is converted to and exports to the load.
Preferably, the transverter portion includes the first current changer module and the second current changer module；The multistage current transformer
Portion includes the first converter module and the second converter module；The crest voltage suppressing portion suppresses node connection by crest voltage
Line is formed, the crest voltage suppress node both ends be connected to connecting line between the first converter module and load and
Connecting line between second converter module and load, the crest voltage suppresses node connecting line includes resistance R1, electricity successively
Hold C5, electric capacity C6 and resistance R2, the tie point grounding connection between the electric capacity C5 and electric capacity C6.
Preferably, the crest voltage suppressing portion is connected with voltage determination module, and the voltage determination module determines respectively
The output voltage size of one converter module and the second converter module；The resistance R1 and resistance R2 are potentiometer, according to logical
The size of first converter module of overvoltage measure module measure and the output voltage of the second converter module changes institute respectively
State resistance R1 and resistance R2 resistance.
A kind of multi-stage power transformation system, it is characterized in that：Including power supply unit, become splenium, transverter portion, current transformer portion, altogether
Shake reactor portion, control unit and resonant load；The output end for becoming splenium and being arranged at power supply unit, makes the power supply unit and resonance
Insulated between load, the input power received from the power supply unit is changed, with the voltage output of multiple insulation；The transverter portion
The output end of the change splenium is arranged at, the alternating voltage from the change splenium output is received, is converted to DC voltage and exports；
The current transformer portion is arranged at the output end in transverter portion, receives the DC voltage from transverter portion output, is converted to friendship
Flow voltage and export；The resonant reaction device portion is made up of input resonant reaction device portion and resonant reaction device portion, and the input is altogether
The reactor portion that shakes produces current filtering and voltage difference, and the resonant reaction device portion guiding is resonated with the resonant load；Institute
State the control unit control change splenium, transverter portion, current transformer portion and the operation in resonant reaction device portion.
Preferably, in addition to probe portion, data store and output determination part, the probe portion is by resonant frequency probe portion
Formed with crest voltage probe portion, the resonant frequency probe portion is common by pulse width modulation detection under test run rotary-die type
Vibration frequency；The crest voltage probe portion is run to the rated electrical in current transformer portion under test run rotary-die type, and presses impulse density
Modulation system detects the crest voltage of resonant load；The data store is stored in what the resonant frequency probe portion was detected
The crest voltage that resonant frequency and crest voltage probe portion are detected；The output determination part is arranged on the defeated of the current transformer portion
Go out end, determine the output voltage and frequency of the resonant load, the result of measure is transmitted to control unit.
Preferably, the control unit controls under test run rotary-die type to detect resonant frequency and peak by the probe portion
Threshold voltage, the control under normal operating mode is so that utilize the resonance in operation mode detection in data store storage
Frequency and crest voltage, operation current transformer portion.
Preferably, in addition to patten transformation portion and output power control unit, the patten transformation portion is according in the data
It is test run rotary-die type or just that whether storage part, which stores the resonant frequency detected under test run rotary-die type and crest voltage by patten transformation,
Normal operation mode；The output in output power control unit regulation current transformer portion so that using export the result of determination part measure as
Basis, exported after the frequency for the voltage for accessing to resonant load is adapted into change according to the change of resonant frequency, the output electricity
Power control unit includes pulse density modulated electric power control portion and pulse width modulation power control unit, the pulse density modulated electricity
Power control unit, control and set output power value is exported in a manner of pulse density modulated, the pulse width modulation power control
Portion, the precise controlling of output power value is performed with pulse width modulation and discharge tube crest voltage suppresses.
A kind of control method of multi-stage power transformation system, it is characterised in that comprise the following steps：
A) test running is started so that run current transformer portion by the frequency of setting；
B) resonant frequency is detected by pulse width modulation by resonant frequency probe portion；
C) run by crest voltage probe portion to the rated voltage in current transformer portion, and load is detected by pulse density modulated mode
The crest voltage of side；
D) crest voltage of the resonant frequency of detection and monitoring is stored in data store；
E) judge whether the resonant frequency that is detected under test run rotary-die type and crest voltage are stored in data store, judged result
During to be, normal operating mode is converted to；
F) power transformer system is operated by the resonant frequency and crest voltage in test running mode detection for being stored in data store
System；
G) output in current transformer portion is adjusted so that the output valve of the current transformer based on output determination part measure is to adapt to resonant frequency
Change and export；
H) judge output valve whether within the error range of setting value；
I) judged result is to perform the fine control of output valve by pulse width modulation in the case where departing from error range
System.
The invention has the advantages that：Carried out by Electric control, realize insulation with splenium is become in input power, go
Except output transformer, thus, it is possible to reduce the price of electric power coversion system, and reduce the size of product and reduce noise；Will be low
Anti-resonance frequency during output is matched with resonant frequency during rated output, and when controlling output power, control mode is mixed
For pulse density modulated (PulseDensityModulation) control mode and pulse width modulation
(PulseWidthModulation) control mode and control, thus, it is possible to more effectively produce voltage and high-frequency stabilization
Electric power；Suppress the crest voltage occurred by change pattern in multi-stage power transformation system, the damage of current transformer can be prevented
Wound.Also, the capacitor of connection in series with a resistor suppresses the electric current of flowing by resistance in crest voltage suppressing portion, thus,
The capacity of resistance can be reduced.Also, determined according to the capacity of current transformer the resistance for suppressing crest voltage resistance value and
The capacitance value of capacitor, thus, even if changing the capacity of current transformer, also can effectively it handle.
Brief description of the drawings
Fig. 1 is the simple property structure chart of the high-frequency multi-stage power transformation system of prior art；
Fig. 2 to Fig. 7 is the circuit diagram of the electric current flowing of display system operational mode；
Fig. 8 is the electric current and voltage plot of the system running pattern of output voltage；
Fig. 9 is the structure chart of the multi-stage power transformation system of embodiments of the invention；
Figure 10 is the multi-stage power transformation system that embodiments of the invention install transformer portion additional between multistage current transformer portion and load
The structure chart of system；
Figure 11 is the circuit diagram of the multi-stage power transformation system of embodiments of the invention；
Figure 12 is each in the multistage current transformer portion of the output voltage of the multi-stage power transformation system of display embodiments of the invention
The chart of the electric current flowing of individual insulated gate bipolar transistor；
Figure 13 is the RC wave filters in the transverter portion of the output voltage of the multi-stage power transformation system of display embodiments of the invention
Voltage and electric current flowing chart；
Figure 14 is the simple property structure chart of the multi-stage power transformation system of the 2nd embodiment of the present invention；
Figure 15 is the simple property structure chart of the multi-stage power transformation system of the 3rd embodiment of the present invention；
Figure 16 is the simple property structure chart of the multi-stage power transformation system of the 4th embodiment of the present invention；
Figure 17 is the flow chart of the running of the test run rotary-die type of the multi-stage power transformation system of the display present invention；
Figure 18 is the flow chart of the running of the normal operating mode of the multi-stage power transformation system of the display present invention.
Reference：
100th, power supply unit；200th, transverter portion；210th, the first current changer module；220th, the second current changer module；300th, it is multistage to become
Flow device portion；310th, the first converter module；320th, the second converter module；400th, crest voltage suppressing portion；500th, transformer portion.
Embodiment
System and its control method is pressed to be further described on the multi-stage power side of the present invention by Fig. 1 to Figure 18.
The multi-stage power side pressure system of the present invention includes power supply unit 100, transverter portion 200, multistage current transformer portion 300, peak
Threshold voltage suppressing portion 400 and load, the multistage current transformer portion 300 receive the three-phase voltage accessed from power supply unit 100, are converted to
DC voltage simultaneously exports；The crest voltage suppressing portion 400 is arranged between the multistage current transformer portion 300 and the load,
Resistance in parallel is formed between the multistage current transformer portion 300 and load, is occurred exporting to the sense of current of the load
Being minimized of crest voltage occurred during change.
Preferably, in addition to transformer portion 500, the transformer portion 500 are arranged in parallel in multistage current transformer portion 300 with bearing
Between load, the power in the multistage current transformer portion 300 inputted is received, high voltage is converted to and exports to the load.
Preferably, the transverter portion 200 includes the first current changer module 210 and the second current changer module 220；It is described more
Level current transformer portion 300 includes the first converter module 310 and the second converter module 320；The crest voltage suppressing portion 400 by
Crest voltage suppresses node connecting line and formed, and the both ends that the crest voltage suppresses node are connected to the first converter module
The connecting line between connecting line and the second converter module and load between load, the crest voltage suppress node connection
Line includes resistance R1, electric capacity C5, electric capacity C6 and resistance R2 successively, and the tie point ground connection between the electric capacity C5 and electric capacity C6 connects
Connect.
Preferably, the crest voltage suppressing portion 400 is connected with voltage determination module（It is not shown）, the voltage determination module
The output voltage size of the first converter module and the second converter module is determined respectively；The resistance R1 and resistance R2 are current potential
Meter, according to the first converter module and the size of the output voltage of the second converter module determined by voltage determination module point
Do not change the resistance of the resistance R1 and resistance R2.
A kind of multi-stage power transformation system, it is characterized in that：Including power supply unit, become splenium, transverter portion, current transformer portion, altogether
Shake reactor portion, control unit and resonant load；The output end for becoming splenium and being arranged at power supply unit, makes the power supply unit and resonance
Insulated between load, the input power received from the power supply unit is changed, with the voltage output of multiple insulation；The transverter portion
The output end of the change splenium is arranged at, the alternating voltage from the change splenium output is received, is converted to DC voltage and exports；
The current transformer portion is arranged at the output end in transverter portion, receives the DC voltage from transverter portion output, is converted to friendship
Flow voltage and export；The resonant reaction device portion is made up of input resonant reaction device portion and resonant reaction device portion, and the input is altogether
The reactor portion that shakes produces current filtering and voltage difference, and the resonant reaction device portion guiding is resonated with the resonant load；Institute
State the control unit control change splenium, transverter portion, current transformer portion and the operation in resonant reaction device portion.
Preferably, in addition to probe portion, data store and output determination part, the probe portion is by resonant frequency probe portion
Formed with crest voltage probe portion, the resonant frequency probe portion is common by pulse width modulation detection under test run rotary-die type
Vibration frequency；The crest voltage probe portion is run to the rated electrical in current transformer portion under test run rotary-die type, and presses impulse density
Modulation system detects the crest voltage of resonant load；The data store is stored in what the resonant frequency probe portion was detected
The crest voltage that resonant frequency and crest voltage probe portion are detected；The output determination part is arranged on the defeated of the current transformer portion
Go out end, determine the output voltage and frequency of the resonant load, the result of measure is transmitted to control unit.
Preferably, the control unit controls under test run rotary-die type to detect resonant frequency and peak by the probe portion
Threshold voltage, the control under normal operating mode is so that utilize the resonance in operation mode detection in data store storage
Frequency and crest voltage, operation current transformer portion.
Preferably, in addition to patten transformation portion and output power control unit, the patten transformation portion is according in the data
It is test run rotary-die type or just that whether storage part, which stores the resonant frequency detected under test run rotary-die type and crest voltage by patten transformation,
Normal operation mode；The output in output power control unit regulation current transformer portion so that using export the result of determination part measure as
Basis, exported after the frequency for the voltage for accessing to resonant load is adapted into change according to the change of resonant frequency, the output electricity
Power control unit includes pulse density modulated electric power control portion and pulse width modulation power control unit, the pulse density modulated electricity
Power control unit, control and set output power value is exported in a manner of pulse density modulated, the pulse width modulation power control
Portion, the precise controlling of output power value is performed with pulse width modulation and discharge tube crest voltage suppresses.
A kind of control method of multi-stage power transformation system, it is characterised in that comprise the following steps：
A) test running is started so that run current transformer portion by the frequency of setting；
B) resonant frequency is detected by pulse width modulation by resonant frequency probe portion；
C) run by crest voltage probe portion to the rated voltage in current transformer portion, and load is detected by pulse density modulated mode
The crest voltage of side；
D) crest voltage of the resonant frequency of detection and monitoring is stored in data store；
E) judge whether the resonant frequency that is detected under test run rotary-die type and crest voltage are stored in data store, judged result
During to be, normal operating mode is converted to；
F) power transformer system is operated by the resonant frequency and crest voltage in test running mode detection for being stored in data store
System；
G) output in current transformer portion is adjusted so that the output valve of the current transformer based on output determination part measure is to adapt to resonant frequency
Change and export；
H) judge output valve whether within the error range of setting value；
I) judged result is to perform the fine control of output valve by pulse width modulation in the case where departing from error range
System.
Such as Fig. 9, power supply unit supplies three-phase alternating voltage to transverter portion, power supply unit can use three-phase alternating-current supply (R,
S、T)；Transverter portion receives the three-phase alternating voltage from power supply unit access, is converted to DC voltage and exports, for this implementation
Example, the rectification of transverter portion simultaneously improve harmonic wave and maintain power factor in a bigger numerical value so that current transformer upper and lower side electricity
The DC voltage of container keeps certain, and voltage ratio is risen in common current, and DC voltage is generated as into high voltage, that is, existed
Voltage needed for multistage current transformer portion generation.Transverter portion includes：First current changer module, receive the three-phase from power supply unit access
Voltage conversion is DC voltage (hereinafter, referred to as " the 1st DC voltage ") and exported；Second current changer module, similarly, receive from
The three-phase voltage of power supply unit access is converted to DC voltage (hereinafter, referred to as " the 2nd DC voltage ") and exported.Multistage current transformer portion
For direct current to be converted to the device of exchange, be converted to from direct current with the required voltage of size and the exchange of frequency, it is of the invention
Multistage current transformer portion receives the power from the access of transverter portion, is converted to the wavy voltage of the phase step type rectangle of three-level, and exports
To load (for example, ozone generator etc.).As described above, power is pressed in multistage current transformer portion is similar to sine wave output,
Thus, by minimum pressure, and harmonic loss can be greatly lowered.Multistage current transformer portion includes：First converter module, receive
The 1st DC voltage provided by the first current changer module, the first output voltage is exported to the 1st terminal of load；Second unsteady flow
Device module receives the 2nd DC voltage provided by the second current changer module, and the second output voltage is exported to the 2nd end of load
Son.Crest voltage suppressing portion forms the resistance of parallel connection between multistage current transformer portion and load, will be transmitted to the electric current of load
Being minimized of crest voltage occurred when direction changes.Direction of current flow from the 1st direction because polarity changes and
When being flowed to the 2nd opposite direction, even if crest voltage occurs, electric current is produced because of the crest voltage of generation and is flowed by resistance
To ground side so that crest voltage is not accessed to element.The output voltage in the potentiometer resistance value and multistage current transformer portion and
Capacity is inversely proportional, is changed according to the volume change in multistage current transformer portion, the more big potentiometric resistance value of capacity is smaller.Cause
This, even if changing load and needing the capacity in the multistage current transformer portion of multi-stage power transformation system being replaced by the capacity more than before
Current transformer portion, without changing other resistance, the circuit module that still can be suppressed using crest voltage.Also, because of production
Raw crest voltage, in order to suppress to flow to the electric current of resistance, capacitor is inserted into, considers internal pressure and life-span, the capacitor quilt
Design ground connection and connection in series with a resistor.
Such as Figure 10, transformer portion has also been provided additionally between multistage current transformer portion and load.It is defeated that transformer portion receives institute
The power of the phase step type square wave in the multistage current transformer portion entered, high voltage is converted to, and provided to load.In multistage current transformer portion
The phase step type square wave of the three-level provided reduces the pressure in transformer portion, and high voltage is converted in transformer portion and is exported defeated
Go out voltage and accessed to load for example, ozone generator), the driving electricity usage as load.
Such as Figure 11 to Figure 13, power supply unit, which supplies alternating voltage to transverter portion, power supply unit, can use three-phase alternating current
Source (R, S, T), the three-phase alternating-current supply are respectively fed to first current changer module and the second current changer module in transverter portion.
That is, three-phase alternating-current supply is that the 1st phase voltage (R), the 2nd phase voltage (S), the 3rd phase voltage (T) are provided to the first transverter mould
Block, similarly, three-phase alternating-current supply are that the 1st phase voltage (R), the 2nd phase voltage (S), the 3rd phase voltage (T) are provided to second and changed
Flow device module.Transverter portion receives the three-phase alternating voltage from power supply unit access, is converted to DC voltage and exports.For this reality
Example is applied, the rectification of transverter portion simultaneously improves harmonic wave and maintains power factor in bigger numerical value so that current transformer upper and lower side electric capacity
The DC voltage of device keeps certain, and voltage ratio is risen in common current, and DC voltage is generated as into high voltage.Transverter
Portion includes：First current changer module, the three-phase voltage from power supply unit access is received, the 1st DC voltage is converted to and exports；Second
Current changer module, similarly, the three-phase voltage from power supply unit access is received, the 2nd DC voltage is converted to and exports.First change of current
Device module and the second current changer module have multiple diode (D of each phase voltage for receiving input and rectification respectively：D1、D2、
D3, D4, D5, D6, D7, D8, D9, D10, D11, D12), by diode (D) and the capacitor (C of rectification part：C1、C2、C3、
C4) used as filter condenser.Reactor (L：L1, L2) it is used to improve power factor and reduces high-frequency.
Multistage current transformer portion receives the power from the access of transverter portion, is converted to the voltage of the phase step type square wave of three-level,
Output extremely load (for example, ozone generator etc.).As described above, similar sine wave power output is pressed in multistage current transformer portion,
Pressure is minimized, harmonic loss can be greatly lowered.As reference, the pressure that the phase step type rectangle of three-level is wavy refers to
It is 2K, 0, the wavy voltage of the rectangle of the phase step type of -2K three-level as shown in Figure 12 and Figure 13 output voltage (Vinv).
Multistage current transformer portion includes：First converter module, receive the 1st direct current provided from the first current changer module
Pressure, the 1st output voltage is exported to the 1st terminal of load；Second converter module, receive what is provided from the second current changer module
2nd DC voltage and the 2nd output voltage is exported to the 2nd terminal of load.First converter module and the second converter module
Be made up of respectively multiple insulated gate bipolar transistor elements, export to the wavy voltage of the phase step type rectangle of three-level provide to
Transformer portion.As reference, insulated gate bipolar transistor (insulated gate bipolar mode transistor)
Element, there is metal oxide semiconductor field effect tube (metal oxide semi-conductor field effect
Transistor) and bipolar transistor structure switch (switching) element.The drive of insulated gate bipolar transistor element
Dynamic electric power is small, being capable of high-speed switch, high internal pressure, high current density.Crest voltage suppressing portion is in multistage current transformer portion with bearing
The resistance of parallel connection is formed between load, the crest voltage occurred when the sense of current of load changes is will be transmitted to and drops to most
It is small.Crest voltage suppressing portion is made up of node connecting line, and the node connecting line connects with first node (N1) and second node (N2)
Connect, first node (N1), between multistage 1st current transformer and the 1st terminal for loading (1)；Second node (N2), positioned at multistage the
Between 2 current transformers and the 2nd terminal for loading (1).The capacity of resistance is reduced in order to suppress to flow to the electric current of resistance, is provided additionally with
Capacitor.Therefore, crest voltage suppresses node connecting line includes again：1st resistance (R1), have what is be connected with first node (N1)
One side；1st capacitor (C5), there is the side being connected with another side of the 1st resistance (R1)；2nd resistance (R2), with
2 nodes (N2) connect；2nd capacitor (C6), there is the side being connected with another side of the 2nd resistance (R2), also, have
Section 3 point (N3) for connecting another side of the 1st capacitor (C5) and another side of the 2nd capacitor (C6), Section 3 point
(N3) it is grounded (GND) connection.Therefore, direction of current flow changes polarity from the 1st direction, and is flowed to the 2nd opposite direction
When dynamic, occur crest voltage, but therefore when the crest voltage that occurs and caused electric current passes through the 1st resistance (R1) and the 2nd resistance
(R2), flow direction ground connection (GND) side.1st resistance (R1) and the 2nd resistance (R2) use the high value with 500 more than Ω respectively
Resistance.During normal 1 direction of current direction so that the 1st resistance (R1) or the 2nd resistance (R2) can not be penetrated.But because of peak value electricity
Pressure and high-current flow to the 1st direction inversely i.e. 2 direction when, by the 1st resistance (R1) and the 2nd resistance with high resistance
(R2), current direction ground side, thus, it is possible to prevent the damage of the insulated gate bipolar transistor in multistage current transformer portion.
In addition, the 1st resistance (R1) and the 2nd resistance (R2) cause the first converter module and second with multistage current transformer portion
The output voltage of converter module determines resistance value in a manner of being inversely proportional.I.e. so that the resistance value of the 1st resistance (R1) is according to more
The capacity of first converter module in level current transformer portion and determine, the resistance value of the 2nd resistance (R2) is according to multistage current transformer portion
The capacity of second converter module and determine.
Resistance value is determined because needs are inversely proportional according to the output voltage of each multistage converter module, therefore, tool
There are the voltage determination module (not shown) of the size for the output voltage for determining each multistage current transformer portion, the 1st resistance (R1) and the 2nd
Resistance (R2) is potentiometer, changes resistance value according to by voltage determination module (not shown) and the size of the voltage determined.
Therefore, even if needing to be replaced by the appearance in the multistage current transformer portion of multi-stage power transformation system because changing and loading (1)
The current transformer portion of the capacity before being more than is measured, without other resistance is changed, is capable of normal use crest voltage suppressing portion
Circuit module.
Such as Figure 14, become the output end that splenium is arranged at power supply unit, becoming splenium makes to insulate between power supply unit and resonant load, turns
The input power received from power supply unit is changed, is converted to multiple outputs.
Transverter portion receives the alternating voltage for becoming splenium output from insulation, is converted to DC voltage and exports.For this
Embodiment, the rectification of transverter portion simultaneously improve harmonic wave and maintain power factor to be maintained at a higher numerical value so that on current transformer
The DC voltage of lower end capacitor keeps certain, and voltage ratio is risen in common current, and DC voltage is generated as into high electricity
Pressure.Rise to high voltage and required voltage is generated in current transformer portion.For the present embodiment, transverter portion includes：1st change of current
Device portion and the 2nd transverter portion, current transformer portion receive the DC voltage from the output of transverter portion, are converted to single-phase high-frequency exchange
Voltage and export.For the present embodiment, current transformer portion connects the 1st current transformer and the 2nd current transformer and multistage is made.
Resonant reaction device portion includes input resonant reaction device portion（It is not shown）With resonant reaction device portion, resonant reaction device is inputted
Portion performs the function of improving power factor and current filtering and produce voltage, and resonant reaction device portion performs guiding and resonated with resonance part
Function.
The voltage exported from current transformer portion accesses to resonant load, is used in resonant load as required power supply.Control
Portion processed perform control become splenium, transverter portion, current transformer portion, resonant reaction device portion operation function.
Such as Figure 15, transverter portion receives the alternating voltage exported from the change splenium of insulation, is converted to DC voltage and defeated
Go out.For the present embodiment, the rectification of transverter portion simultaneously improves harmonic wave and maintains power factor in a higher numerical value so that unsteady flow
The DC voltage of end capacitor keeps certain above and below device, and voltage ratio is risen in common current, and DC voltage is generated as
High voltage.Rise to high voltage and generate in the voltage needed for current transformer portion.
Current transformer portion receives the DC voltage from the output of transverter portion, is converted to single-phase high-frequency alternating voltage and defeated
Go out.
Resonant reaction device portion includes input resonant reaction device portion and resonant reaction device portion, and input resonant reaction device portion performs electricity
Stream filtering and the function of producing voltage difference, resonant reaction device portion perform the function that guiding is resonated with resonant load.
Probe portion includes resonant frequency probe portion and crest voltage probe portion.Resonant frequency probe portion performs detection resonance frequency
The function of rate, and the function that resonant frequency is detected by pulse width modulation is performed under test run rotary-die type.Crest voltage is visited
Survey portion performs the function of the crest voltage of detection resonant load, and crest voltage probe portion is under test run rotary-die type until current transformer portion
Specified operation power, perform the function of the crest voltage that resonant load is detected by pulse density modulated mode.
Data store perform be stored in resonant frequency probe portion detection test run rotary-die type under resonant frequency and at peak
The function of the crest voltage of resonant load under the test run rotary-die type of threshold voltage probe portion detection.
Output determination part is arranged on the output end in current transformer portion, performs the output voltage and frequency of measure resonant load, and
The result of measure is transmitted to the function of control unit.
Control unit performs control and becomes splenium, transverter portion, current transformer portion, resonant reaction device portion, probe portion, data store
And the function of the operation of output determination part.For control unit under test run rotary-die type, control detects resonant frequency and peak by probe portion
Threshold voltage, under normal operating mode, control using be stored in the resonant frequency that is detected under data store test run rotary-die type and
Crest voltage operation current transformer portion.Now, parallel pulse width modulated controls, so that high voltage is no more than detected peak value electricity
Pressure.
Such as Figure 16, the present embodiment is additionally formed output power control unit and patten transformation portion deposits compared with above example
In discrepancy, other structures are similar, illustrated below based on different structure.
Resonant load capacitor changes because of the surrounding environment elements affect such as temperature, pressure, and thus, resonant frequency also occurs
Change.Also, when occurring damaged, the impedance of overall load changes the part in multiple resonant loads, resonant frequency
Change, and output power control unit has the function for the output for performing regulation current transformer portion so that based on output determination part
The result of measure, the frequency for the voltage for accessing to resonant load is adapted into change according to the change of resonant frequency and exported.
Output power control unit includes：Pulse width modulation power control unit and pulse density modulated electric power control portion, control
Pulse density modulated (Pulse Density Modulation) electric power control portion processed exports first by pulse density modulated mode
Secondary set output valve, second of execution are pressed using pulse width modulation (Pulse Width Modulation) electric power control portion
Pulse width modulation finely controls output valve.That is, control the control of mixed pulses width modulated and pulse close output power
Degree modulation control two ways carrys out balanced voltage, substantially controls during output valve utilize pulse density modulated control mode for the first time,
Pulse width modulation control method is utilized during second of precise controlling output valve.It is also, wide in pulse used in Electric control
Degree modulation control mode is also used for controlling the crest voltage of discharge tube to be no more than the crest voltage detected under test run rotary-die type.
Patten transformation portion performs the function that multi-stage power transformation system is converted to test run rotary-die type or normal operating mode.
Patten transformation portion judges the resonant frequency detected under test run rotary-die type and whether crest voltage is stored in data store, and
Multi-stage power transformation system is converted into test run rotary-die type or normal operating mode.
Such as Figure 17,
It is first begin to test run rotary-die type；
Perform the process in the frequency operation current transformer portion by setting；
Perform the process for detecting resonant frequency by pulse width modulation by resonant frequency probe portion；
Execution is run to the rated voltage in current transformer portion by crest voltage probe portion, and is detected by pulse density modulated mode negative
Carry the crest voltage of side；
Perform the process that the crest voltage of the resonant frequency of detection and detection is stored in data store.
Such as Figure 18,
Perform the resonant frequency for judging to be detected under test run rotary-die type and whether crest voltage is stored in the process of data store；
Judged result is when the resonant frequency and crest voltage of test running mode detection are not stored in data store, by Figure 17
Test running mode operation, judged result is to be stored in data storage in the resonant frequency and crest voltage of test running mode detection
During portion, that is, when completing test running Modal action, normal operating mode is converted to, starts the operation of normal operating mode；
Multistage resonance is operated by the resonant frequency and crest voltage in test running mode detection for being stored in data store
Load is controlled with electric power transformation system and parallel pulse width modulated, so that high voltage is no more than the crest voltage of detection；
Adjust the output in current transformer portion so that based on the current transformer portion of output determination part measure output valve according to resonant frequency
Change and adapt to change output, and be controlled such that in a manner of by pulse density modulated the mistake for exporting set output valve
Journey；
Judge output valve whether within setting value error range；
Judged result performs second when departing from error range to terminate when within error range by pulse width modulation
The precise controlling of secondary output valve.
Described above is only the preferred embodiment of the present invention, and protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical schemes belonged under thinking of the present invention belong to protection scope of the present invention.It should be pointed out that for the art
Those of ordinary skill for, some improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (9)
1. a kind of multi-stage power transformation system, it is characterized in that：Including power supply unit, transverter portion, multistage current transformer portion, crest voltage
Suppressing portion and load, the multistage current transformer portion receive the three-phase voltage from power supply unit access, are converted to DC voltage and export；
The crest voltage suppressing portion is arranged between the multistage current transformer portion and the load, in the multistage current transformer portion with bearing
The resistance of parallel connection is formed between load, the crest voltage occurred when exporting to the sense of current of the load and changing is dropped to most
It is small.
2. multi-stage power transformation system according to claim 1, it is characterized in that：Also include transformer portion, the transformer
Portion is arranged in parallel between multistage current transformer portion and load, receives the power in the multistage current transformer portion inputted, is converted to high electricity
Press and export to the load.
3. multi-stage power transformation system according to claim 1, it is characterized in that：The transverter portion includes the first transverter
Module and the second current changer module；The multistage current transformer portion includes the first converter module and the second converter module；It is described
Crest voltage suppressing portion suppresses node connecting line by crest voltage and formed, and the both ends that the crest voltage suppresses node connect respectively
The connecting line between connecting line and the second converter module and load between the first converter module and load, the peak value
Voltage suppresses node connecting line includes resistance R1, electric capacity C5, electric capacity C6 and resistance R2 successively, between the electric capacity C5 and electric capacity C6
Tie point grounding connection.
4. multi-stage power transformation system according to claim 3, it is characterized in that：The crest voltage suppressing portion is connected with electricity
Pressure measure module, the voltage determination module determines the first converter module respectively and the output voltage of the second converter module is big
It is small；The resistance R1 and resistance R2 are potentiometer, according to the first converter module and second determined by voltage determination module
The size of the output voltage of converter module changes the resistance of the resistance R1 and resistance R2 respectively.
5. a kind of multi-stage power transformation system, it is characterized in that：Including power supply unit, become splenium, transverter portion, current transformer portion, resonance
Reactor portion, control unit and resonant load；The output end for becoming splenium and being arranged at power supply unit, make the power supply unit and resonance negative
Insulated between load, the input power received from the power supply unit is changed, with the voltage output of multiple insulation；The transverter portion is set
The output end of the change splenium is placed in, the alternating voltage from the change splenium output is received, is converted to DC voltage and exports；Institute
The output end that current transformer portion is arranged at transverter portion is stated, the DC voltage from transverter portion output is received, is converted to exchange
Voltage and export；The resonant reaction device portion is made up of input resonant reaction device portion and resonant reaction device portion, the input resonance
Reactor portion produces current filtering and voltage difference, and the resonant reaction device portion guiding is resonated with the resonant load；It is described
Control unit control is described to become splenium, transverter portion, current transformer portion and the operation in resonant reaction device portion.
6. multi-stage power transformation system according to claim 5, it is characterized in that：Also include probe portion, data store and
Determination part is exported, the probe portion is made up of resonant frequency probe portion and crest voltage probe portion, the resonant frequency probe portion
By pulse width modulation detection resonant frequency under test run rotary-die type；The crest voltage probe portion is under test run rotary-die type
Run to the rated electrical in current transformer portion, and the crest voltage of resonant load is detected by pulse density modulated mode；The data
The peak value electricity that the resonant frequency and crest voltage probe portion that the resonant frequency probe portion that storage part is stored in is detected are detected
Pressure；The output determination part is arranged on the output end in the current transformer portion, determines the output voltage and frequency of the resonant load,
The result of measure is transmitted to control unit.
7. multi-stage power transformation system according to claim 6, it is characterized in that：The control unit is controlled under test run rotary-die type
System to detect resonant frequency and crest voltage by the probe portion, controls and cause using described under normal operating mode
The resonant frequency and crest voltage in operation mode detection of data store storage, operation current transformer portion.
8. multi-stage power transformation system according to claim 5, it is characterized in that：Also include patten transformation portion and output power
Control unit, the patten transformation portion according to the data store whether store the resonant frequency that is detected under test run rotary-die type and
Patten transformation is test run rotary-die type or normal operating mode by crest voltage；The output power control unit regulation current transformer portion
Output so that based on exporting the result of determination part measure, the frequency of voltage of resonant load will be accessed to according to resonance frequency
The change of rate exports after adapting to change, and the output power control unit includes pulse density modulated electric power control portion and pulse width
Modulate electric power control portion, the pulse density modulated electric power control portion, control exported in a manner of pulse density modulated it is set defeated
Go out power value, the pulse width modulation power control unit, the fine control of output power value is performed with pulse width modulation
System and discharge tube crest voltage suppress.
9. a kind of control method of multi-stage power transformation system, it is characterised in that comprise the following steps：
（a）Start test running so that run current transformer portion by the frequency of setting；
（b）Resonant frequency is detected by pulse width modulation by resonant frequency probe portion；
（c）Run to the rated voltage in current transformer portion, and detected by pulse density modulated mode negative by crest voltage probe portion
Carry the crest voltage of side；
（d）The crest voltage of the resonant frequency of detection and monitoring is stored in data store；
（e）Judge whether the resonant frequency that is detected under test run rotary-die type and crest voltage are stored in data store, judge to tie
Fruit is when being, to be converted to normal operating mode；
（f）By resonant frequency and crest voltage operating the power transformer system in test running mode detection for being stored in data store
System；
（g）Adjust the output in current transformer portion so that the output valve of the current transformer based on output determination part measure is to adapt to resonance frequency
The change of rate and export；
（h）Judge output valve whether within the error range of setting value；
（i）Judged result is to perform the fine control of output valve by pulse width modulation in the case where departing from error range
System.
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| US6281664B1 (en) * | 1999-01-13 | 2001-08-28 | Honda Giken Kogyo Kabushiki Kaisha | Generator and generator apparatus |
| CN1699912A (en) * | 2004-05-20 | 2005-11-23 | 日立欧姆龙金融系统有限公司 | Displacement detection apparatus and displacement detection method |
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