CN107565833B - A kind of controlled rectification method, apparatus and power electronic equipment - Google Patents
A kind of controlled rectification method, apparatus and power electronic equipment Download PDFInfo
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Abstract
This application provides a kind of controlled rectification method, apparatus and power electronic equipments, this method and device are applied to power electronic equipment, power electronic equipment includes controlled rectification circuit, which is specially to detect the phase angle of the input voltage of controlled rectification circuit；Input voltage is reconstructed according to the amplitude of phase angle and input voltage, obtains reconstruct voltage；The sampled voltage of input voltage is modified according to reconstruct voltage, obtains the reference voltage of input voltage；Controlled rectification circuit is controlled according to reference voltage to rectify input voltage.Reconstruct voltage is obtained by the method for voltage reconstruction, and avoids the problem of power electronic equipment can not work normally when input voltage is distorted using reconstruct voltage substitution sampled voltage as the reference voltage of equipment in the case where input voltage is interfered.
Description
Technical field
This application involves power electronics fields, more specifically to a kind of controlled rectification method, apparatus and electric power
Electronic equipment.
Background technique
Reliability is the electricity such as big-power transducer, electronic transformer, commutator transformer, active power factor rectifier
The important indicator of power electronic equipment.For above-mentioned power electronic equipment, all there is controlled rectification circuit and inverter circuit, In
During carrying out controlled rectification to input current, the steady operation of controlled rectification circuit depends on the sampling of input voltage, i.e., surely
Fixed sampled voltage is the key factor of controlled rectification circuit steady operation.When input voltage is because heavily disturbed or other are former
When thus distorting, will lead to sampled voltage distorts therewith, is influenced by the sampled voltage to distort, will lead to controlled rectification
The generation Severe distortion therewith for exporting electric current, as shown in Figure 1, the overcurrent protection of equipment can be caused, at this time so as to cause above-mentioned electricity
Power electronic equipment can not work normally.
Summary of the invention
In view of this, the application provides a kind of controlled rectification method, apparatus and power electronic equipment, for input voltage
It is reconstructed, avoids causing it can not work normally when input voltage is distorted when power electronic equipment.
To achieve the goals above, it is proposed that scheme it is as follows:
A kind of controlled rectification method is applied to power electronic equipment, and the power electronic equipment includes controlled rectification circuit,
The controlled rectification method comprising steps of
Detect the phase angle of the input voltage of the controlled rectification circuit；
The input voltage is reconstructed according to the amplitude of the phase angle and the input voltage, obtains reconstruct electricity
Pressure；
The sampled voltage of the input voltage is modified according to the reconstruct voltage, obtains the ginseng of the input voltage
Examine voltage；
The controlled rectification circuit is controlled according to the reference voltage to rectify the input voltage.
It is optionally, described that the input voltage is reconstructed according to the amplitude of the phase angle and the input voltage,
Include:
The single-phase reconstruct voltage of a phase in the input voltage is calculated with the amplitude according to the phase angle；
The single-phase reconstruct voltage of other two-phase according to phase difference calculating of the other two-phase with a phase, three single-phase
It reconstructs voltage and constitutes the reconstruct voltage.
It is optionally, described to be modified the reconstruct voltage to the sampled voltage of the input voltage, comprising:
Calculate the difference between the reconstruct voltage and the sampled voltage；
When the difference is less than or equal to preset threshold, the sampled voltage is exported as the reference voltage；
It is the reference voltage by the reconstruct voltage output when the difference is greater than the preset threshold.
Optionally, the preset threshold is the 20% of the peak value of the input voltage.
A kind of controllable rectifying device is applied to power electronic equipment, and the power electronic equipment includes controlled rectification circuit,
The controllable rectifying device includes:
Phase detecting module, the phase angle of the input voltage for detecting the controlled rectification circuit；
Voltage reconstruction module, for being carried out according to the amplitude of the phase angle and the input voltage to the input voltage
Reconstruct obtains reconstruct voltage；
Voltage correction module is obtained for being modified according to the reconstruct voltage to the sampled voltage of the input voltage
To the reference voltage of the input voltage；
Rectify control module, for according to the reference voltage control the controlled rectification circuit to the input voltage into
Row rectification.
Optionally, the voltage reconstruction module includes:
First reconfiguration unit, for calculating the single-phase of a phase in the input voltage according to the phase angle and the amplitude
Reconstruct voltage；
Second reconfiguration unit, for the single-phase of the other two-phase according to phase difference calculating of the other two-phase with a phase
Voltage is reconstructed, three single-phase reconstruct voltages constitute the reconstruct voltage.
Optionally, the voltage correction module includes:
Difference computational unit, for calculating the difference between the reconstruct voltage and the sampled voltage；
First output unit, for being by sampled voltage output when the difference is less than or equal to preset threshold
The reference voltage；
Second output unit, for being institute by the reconstruct voltage output when the difference is greater than the preset threshold
State reference voltage.
Optionally, the preset threshold is the 20% of the peak value of the input voltage.
A kind of power electronic equipment, including controlled rectification circuit further include controllable rectifying device as described above.
It can be seen from the above technical scheme that this application discloses a kind of controlled rectification method, apparatus and power electronics
Equipment, this method and device are applied to power electronic equipment, and power electronic equipment includes controlled rectification circuit, the controlled rectification side
Method is specially to detect the phase angle of the input voltage of controlled rectification circuit；According to the amplitude of phase angle and input voltage to input electricity
Pressure is reconstructed, and obtains reconstruct voltage；The sampled voltage of input voltage is modified according to reconstruct voltage, obtains input voltage
Reference voltage；Controlled rectification circuit is controlled according to reference voltage to rectify input voltage.Pass through the method for voltage reconstruction
Reconstruct voltage is obtained, and in the case where input voltage is interfered using reconstruct voltage substitution sampled voltage as the reference of equipment
Voltage avoids the problem of power electronic equipment can not work normally when input voltage is distorted.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of application for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is a kind of sampled voltage-output current diagram provided by the present application；
Fig. 2 is a kind of step flow chart of controlled rectification method provided by the embodiments of the present application；
Fig. 3 is that reference voltage provided by the embodiments of the present application reconstructs schematic diagram；
Fig. 4 is the schematic diagram of the control system of power electronic equipment provided by the embodiments of the present application；
Fig. 5 is another sampled voltage-output current diagram provided by the embodiments of the present application；
Fig. 6 is a kind of structural block diagram of controllable rectifying device provided by the embodiments of the present application.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present application, technical solutions in the embodiments of the present application carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of embodiments of the present application, instead of all the embodiments.It is based on
Embodiment in the application, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall in the protection scope of this application.
Embodiment one
Fig. 2 is a kind of step flow chart of controlled rectification method provided by the embodiments of the present application.
As shown in Fig. 2, present embodiments providing a kind of controlled rectification method, this method is applied to Electrical electronics and sets
Standby, which is big-power transducer, electronic transformer, commutator transformer, active power factor rectifier
Deng including at least controlled rectification circuit, the controlled rectification method is specific to wrap for specifically controlling the controlled rectification circuit
Include following steps:
S101: the input voltage of controlled rectification circuit is detected.
Here input voltage can regard the input voltage of entire power electronic equipment namely the input electricity of power grid as
Pressure, the working environment of power grid is generally more severe, be easy by thunder and lightning, other power consumers high-power electrical equipment it is dry
It disturbs, so that the waveform of input voltage be made to generate distortion.This is also technical solution provided herein technical problem to be solved.
In order to control controlled rectification circuit, first have to do is exactly to detect to input voltage, obtains the phase of input voltage
Parallactic angle and its amplitude.
In general, substantially stationary when the amplitude of input voltage, for low voltage electric network, amplitude is phase voltage
1.414 times, specifically forVolt.
S102: input voltage is reconstructed according to phase angle and amplitude.
So-called reconstruct, which refers to, constructs the ideal voltage signal of waveform, the voltage according to the relevant parameter of input voltage
Signal is more close to close to the desired voltage for not receiving interference.Here phase angle and width of the parameter selected for input voltage
Value, constructs reconstruct voltage by phase angle and amplitude, the specific steps are as follows:
Firstly, being configured to the reconstruct voltage of a phase input voltage in three-phase input voltage according to phase angle and amplitude；Then,
Remaining two-phase is calculated according to the reconstruct voltage of a calculated phase, to obtain the reconstruct voltage of other two-phase.It has
The calculation formula of body is as follows:
Wherein, uacalFor the reconstruct voltage of a phase, ubcalAnd uccalFor the reconstruct voltage of b phase and c phase, U is three-phase input electricity
The amplitude of pressure, θ are phase angle, the function of its actually time t of the phase angle, and function of time t is omitted in this formula.
S103: the sampled voltage of input voltage is modified according to reconstruct voltage.
Here amendment, which refers to, carries out idealization amendment for the waveform of reference voltage required for above-mentioned controlled rectification circuit,
After the sampled voltage and reconstruct voltage for obtaining input voltage, by, to the correcting process of sampled voltage, being obtained using reconstruct voltage
To the ideal reference voltage of waveform.Specific step is as follows:
Firstly, calculating sampled voltage and reconstructing the difference between voltage, input voltage sheet can consider when difference is smaller
Body stablize, sampled voltage can serve as reference voltage use, when difference is larger between the two, then it is assumed that input voltage by
Biggish interference is arrived, recycling its sampled voltage to carry out control to controlled rectification circuit will lead to overcurrent protection occur；Cause
This, when difference between the two is less than or equal to preset threshold, just by the sampled voltage output of the input voltage for reference to electricity
Pressure；When difference between the two is greater than preset threshold, will just reconstruct voltage output is reference voltage.
By taking the input voltage of a phase as an example, as shown in figure 3, t in figure0-t1In period, because | uacal-uaad|≤ufa, ufaFor
Above-mentioned preset threshold, then the input voltage that calculating is actually used in the power electronic equipment is the phase voltage of sampled voltage, i.e.,
ua=uaad；t1-t2In period, because | uacal-uaad|>ufa, then the input voltage that calculating is actually used in power electronic equipment is
Reconstruct voltage, i.e. ua=uacal；t2-t3In period, because | uacal-uaad|≤ufa, then meter is actually used in power electronic equipment
The input voltage of calculation is the phase voltage of sampled voltage, i.e. ua=uaad。
Above-mentioned preset threshold generally takes the 20% of virtual voltage peak value, can also be adjusted according to actual use demand.
S104: controlled rectification circuit is controlled according to reference voltage, input voltage is rectified.
It is according to control controlled rectification circuit work, i.e., to input with the reference voltage after obtaining above-mentioned reference voltage
Voltage carries out rectification processing, to obtain the DC voltage that total subsequent conditioning circuit carries out inversion or other processing.
By taking the control system of double-closed-loop control three-phase controlled rectifier circuit as an example, the schematic diagram of the control system such as attached drawing 4
It is shown, the reference voltage after above-mentioned identifying processing is substituted into figure in the calculation formula of command voltage vector calculating section:
Wherein:
So, the reference voltage being actually used in control system just carries out the voltage disturbance part that sampling obtains
It effectively removes, avoids when input voltage is interfered, control system is still calculated using the sampled voltage of interference, because of electricity
Throat floater and the problem of cause equipment can not work normally, to improve the operational reliability of power electronic equipment.It is inputting
When voltage disturbance is larger, power electronic equipment remains to work normally, and electric current is not in that Severe distortion caused flow problem, such as schemes
Shown in 5.
It can be seen from the above technical proposal that this method is applied to electric power this application provides a kind of controlled rectification method
Electronic equipment, power electronic equipment include controlled rectification circuit, which is specially to detect controlled rectification circuit
The phase angle of input voltage；Input voltage is reconstructed according to the amplitude of phase angle and input voltage, obtains reconstruct voltage；Root
The sampled voltage of input voltage is modified according to reconstruct voltage, obtains the reference voltage of input voltage；According to reference voltage control
Controlled rectification circuit processed rectifies input voltage.Reconstruct voltage is obtained by the method for voltage reconstruction, and in input voltage
Using reconstruct voltage substitution sampled voltage as the reference voltage of equipment in the case where being interfered, avoids power electronic equipment and exist
The problem of can not work normally when input voltage is distorted.
Embodiment two
Fig. 6 is a kind of structural block diagram of controllable rectifying device provided by the embodiments of the present application.
As shown in fig. 6, present embodiments providing a kind of controllable rectifying device, which is applied to Electrical electronics and sets
Standby, which is big-power transducer, electronic transformer, commutator transformer, active power factor rectifier
Deng including at least controlled rectification circuit, the controllable rectifying device is specific to wrap for specifically controlling the controlled rectification circuit
Include phase detecting module 10, voltage reconstruction module 20, voltage correction module 30 and rectification control module 40.
Phase detecting module is used to detect the input voltage of controlled rectification circuit.
Here input voltage can regard the input voltage of entire power electronic equipment namely the input electricity of power grid as
Pressure, the working environment of power grid is generally more severe, be easy by thunder and lightning, other power consumers high-power electrical equipment it is dry
It disturbs, so that the waveform of input voltage be made to generate distortion.This is also technical solution provided herein technical problem to be solved.
In order to control controlled rectification circuit, first have to do is exactly to detect to input voltage, obtains the phase of input voltage
Parallactic angle and its amplitude.
In general, substantially stationary when the amplitude of input voltage, for low voltage electric network, amplitude is phase voltage
1.414 times, specifically forVolt.
Voltage reconstruction module is for being reconstructed input voltage according to phase angle and amplitude.
So-called reconstruct, which refers to, constructs the ideal voltage signal of waveform, the voltage according to the relevant parameter of input voltage
Signal is more close to close to the desired voltage for not receiving interference.Here phase angle and width of the parameter selected for input voltage
Value, constructs reconstruct voltage by phase angle and amplitude, which includes the first reconfiguration unit and the second reconfiguration unit.
First reconfiguration unit is used to be configured to the weight of a phase input voltage in three-phase input voltage according to phase angle and amplitude
Structure voltage；Second reconfiguration unit is for calculating remaining two-phase according to the reconstruct voltage of a calculated phase, to obtain
In addition the reconstruct voltage of two-phase.
Its specific calculation formula is as follows:
Wherein, uacalFor the reconstruct voltage of a phase, ubcalAnd uccalFor the reconstruct voltage of b phase and c phase, U is three-phase input electricity
The amplitude of pressure, θ are phase angle, the function of its actually time t of the phase angle, and function of time t is omitted in this formula.
Voltage correction module is used to be modified the sampled voltage of input voltage according to reconstruct voltage.
Here amendment, which refers to, carries out idealization amendment for the waveform of reference voltage required for above-mentioned controlled rectification circuit,
After the sampled voltage and reconstruct voltage for obtaining input voltage, by, to the correcting process of sampled voltage, being obtained using reconstruct voltage
To the ideal reference voltage of waveform.The module includes difference computational unit, the first output unit and the second output unit.
Difference computational unit is used to calculate sampled voltage and reconstructs the difference between voltage, can consider when difference is smaller
Input voltage itself is stable, and sampled voltage can serve as reference voltage use, when difference is larger between the two, then it is assumed that
Input voltage receives biggish interference, and recycling its sampled voltage to carry out control to controlled rectification circuit will lead to occur
Stream protection；First output unit is used for when difference between the two is less than or equal to preset threshold, by adopting for the input voltage
Sample voltage output is reference voltage；Second output unit is used for when difference between the two is greater than preset threshold, by reconstruct electricity
Pressure output is reference voltage.
By taking the input voltage of a phase as an example, as shown in figure 3, t in figure0-t1In period, because | uacal-uaad|≤ufa, ufaFor
Above-mentioned preset threshold, then the input voltage that calculating is actually used in the power electronic equipment is the phase voltage of sampled voltage, i.e.,
ua=uaad；t1-t2In period, because | uacal-uaad|>ufa, then the input voltage that calculating is actually used in power electronic equipment is
Reconstruct voltage, i.e. ua=uacal；t2-t3In period, because | uacal-uaad|≤ufa, then meter is actually used in power electronic equipment
The input voltage of calculation is the phase voltage of sampled voltage, i.e. ua=uaad。
Above-mentioned preset threshold generally takes the 20% of virtual voltage peak value, can also be adjusted according to actual use demand.
Rectification control module is used to control controlled rectification circuit according to reference voltage and rectify to input voltage.
It is according to control controlled rectification circuit work, i.e., to input with the reference voltage after obtaining above-mentioned reference voltage
Voltage carries out rectification processing, to obtain the DC voltage that total subsequent conditioning circuit carries out inversion or other processing.
By taking the control system of double-closed-loop control three-phase controlled rectifier circuit as an example, the schematic diagram of the control system such as attached drawing 4
It is shown, the reference voltage after above-mentioned identifying processing is substituted into figure in the calculation formula of command voltage vector calculating section:
Wherein:
So, the reference voltage being actually used in control system just carries out the voltage disturbance part that sampling obtains
It effectively removes, avoids when input voltage is interfered, control system is still calculated using the sampled voltage of interference, because of electricity
Throat floater and the problem of cause equipment can not work normally, to improve the operational reliability of power electronic equipment.It is inputting
When voltage disturbance is larger, power electronic equipment remains to work normally, and electric current is not in that Severe distortion caused flow problem, such as schemes
Shown in 5.
It can be seen from the above technical proposal that the device is applied to electric power this application provides a kind of controllable rectifying device
Electronic equipment, power electronic equipment include controlled rectification circuit, which is specially to detect controlled rectification circuit
The phase angle of input voltage；Input voltage is reconstructed according to the amplitude of phase angle and input voltage, obtains reconstruct voltage；Root
The sampled voltage of input voltage is modified according to reconstruct voltage, obtains the reference voltage of input voltage；According to reference voltage control
Controlled rectification circuit processed rectifies input voltage.Reconstruct voltage is obtained by the method for voltage reconstruction, and in input voltage
Using reconstruct voltage substitution sampled voltage as the reference voltage of equipment in the case where being interfered, avoids power electronic equipment and exist
The problem of can not work normally when input voltage is distorted.
Embodiment three
A kind of power electronic equipment is present embodiments provided, which is specially big-power transducer, electronics
Electronic transformer, commutator transformer, active power factor rectifier etc. include at least controlled rectification circuit, further include controllable whole
Device is flowed, the controllable rectifying device is for specifically controlling the controlled rectification circuit.
The controllable rectifying device is specifically used for the phase angle of the input voltage of detection controlled rectification circuit；According to phase angle and
Input voltage is reconstructed in the amplitude of input voltage, obtains reconstruct voltage；According to reconstruct voltage to the sampling electricity of input voltage
Pressure is modified, and obtains the reference voltage of input voltage；Controlled rectification circuit is controlled according to reference voltage to carry out input voltage
Rectification.Reconstruct voltage is obtained by the method for voltage reconstruction, and replaces reconstruct voltage in the case where input voltage is interfered
Reference voltage for sampled voltage as equipment, avoiding power electronic equipment can not normal work when input voltage is distorted
The problem of making.
All the embodiments in this specification are described in a progressive manner, the highlights of each of the examples are with
The difference of other embodiments, the same or similar parts between the embodiments can be referred to each other.
It should be understood by those skilled in the art that, the embodiments of the present application may be provided as method, apparatus or calculating
Machine program product.Therefore, the embodiment of the present application can be used complete hardware embodiment, complete software embodiment or combine software and
The form of the embodiment of hardware aspect.Moreover, the embodiment of the present application can be used one or more wherein include computer can
With in the computer-usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) of program code
The form of the computer program product of implementation.
The embodiment of the present application is referring to according to the method for the embodiment of the present application, terminal device (system) and computer program
The flowchart and/or the block diagram of product describes.It should be understood that flowchart and/or the block diagram can be realized by computer program instructions
In each flow and/or block and flowchart and/or the block diagram in process and/or box combination.It can provide these
Computer program instructions are set to general purpose computer, special purpose computer, Embedded Processor or other programmable data processing terminals
Standby processor is to generate a machine, so that being held by the processor of computer or other programmable data processing terminal devices
Capable instruction generates for realizing in one or more flows of the flowchart and/or one or more blocks of the block diagram
The device of specified function.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing terminal devices
In computer-readable memory operate in a specific manner, so that instruction stored in the computer readable memory generates packet
The manufacture of command device is included, which realizes in one side of one or more flows of the flowchart and/or block diagram
The function of being specified in frame or multiple boxes.
These computer program instructions can also be loaded into computer or other programmable data processing terminal devices, so that
Series of operation steps are executed on computer or other programmable terminal equipments to generate computer implemented processing, thus
The instruction executed on computer or other programmable terminal equipments is provided for realizing in one or more flows of the flowchart
And/or in one or more blocks of the block diagram specify function the step of.
Although preferred embodiments of the embodiments of the present application have been described, once a person skilled in the art knows bases
This creative concept, then additional changes and modifications can be made to these embodiments.So the following claims are intended to be interpreted as
Including preferred embodiment and all change and modification within the scope of the embodiments of the present application.
Finally, it is to be noted that, herein, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that process, method, article or terminal device including a series of elements not only wrap
Those elements are included, but also including other elements that are not explicitly listed, or further includes for this process, method, article
Or the element that terminal device is intrinsic.In the absence of more restrictions, being wanted by what sentence "including a ..." limited
Element, it is not excluded that there is also other identical elements in process, method, article or the terminal device for including the element.
Technical solution provided herein is described in detail above, specific case used herein is to this Shen
Principle and embodiment please is expounded, the present processes that the above embodiments are only used to help understand and its
Core concept；At the same time, for those skilled in the art, according to the thought of the application, in specific embodiment and application
There will be changes in range, in conclusion the contents of this specification should not be construed as limiting the present application.
Claims (7)
1. a kind of controlled rectification method is applied to power electronic equipment, the power electronic equipment includes controlled rectification circuit,
Be characterized in that, the controlled rectification method comprising steps of
Detect the phase angle of the input voltage of the controlled rectification circuit；
The input voltage is reconstructed according to the amplitude of the phase angle and the input voltage, obtains reconstruct voltage；
The sampled voltage of the input voltage is modified according to the reconstruct voltage, obtains the reference electricity of the input voltage
Pressure；
The controlled rectification circuit is controlled according to the reference voltage to rectify the input voltage；
Wherein, described that the sampled voltage of the input voltage is modified according to the reconstruct voltage, obtain the input electricity
The reference voltage of pressure, comprising:
Calculate the difference between the reconstruct voltage and the sampled voltage；
When the difference is less than or equal to preset threshold, the sampled voltage is exported as the reference voltage；
It is the reference voltage by the reconstruct voltage output when the difference is greater than the preset threshold.
2. controlled rectification method as described in claim 1, which is characterized in that described according to the phase angle and input electricity
The input voltage is reconstructed in the amplitude of pressure, comprising:
The single-phase reconstruct voltage of a phase in the input voltage is calculated with the amplitude according to the phase angle；
The single-phase reconstruct voltage of other two-phase, three single-phase reconstruct according to phase difference calculating of the other two-phase with a phase
Voltage constitutes the reconstruct voltage.
3. controlled rectification method as described in claim 1, which is characterized in that the preset threshold is the peak of the input voltage
The 20% of value.
4. a kind of controllable rectifying device is applied to power electronic equipment, the power electronic equipment includes controlled rectification circuit,
It is characterized in that, the controllable rectifying device includes:
Phase detecting module, the phase angle of the input voltage for detecting the controlled rectification circuit；
Voltage reconstruction module, for carrying out weight to the input voltage according to the amplitude of the phase angle and the input voltage
Structure obtains reconstruct voltage；
Voltage correction module obtains institute for being modified according to the reconstruct voltage to the sampled voltage of the input voltage
State the reference voltage of input voltage；
Control module is rectified, it is whole to input voltage progress for controlling the controlled rectification circuit according to the reference voltage
Stream；
Wherein, the voltage correction module includes:
Difference computational unit, for calculating the difference between the reconstruct voltage and the sampled voltage；
First output unit, for being described by sampled voltage output when the difference is less than or equal to preset threshold
Reference voltage；
Second output unit, for being the ginseng by the reconstruct voltage output when the difference is greater than the preset threshold
Examine voltage.
5. controllable rectifying device as claimed in claim 4, which is characterized in that the voltage reconstruction module includes:
First reconfiguration unit, for calculating the single-phase reconstruct of a phase in the input voltage with the amplitude according to the phase angle
Voltage；
Second reconfiguration unit, for the in addition single-phase reconstruct of two-phase according to phase difference calculating of the other two-phase with a phase
Voltage, three single-phase reconstruct voltages constitute the reconstruct voltage.
6. controllable rectifying device as claimed in claim 4, which is characterized in that the preset threshold is the peak of the input voltage
The 20% of value.
7. a kind of power electronic equipment, including controlled rectification circuit, which is characterized in that further include such as any one of claim 4-6
The controllable rectifying device.
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