CN106452127B - Voltage adjusting method, device and double IPM module drivers - Google Patents
Voltage adjusting method, device and double IPM module drivers Download PDFInfo
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- CN106452127B CN106452127B CN201610882110.4A CN201610882110A CN106452127B CN 106452127 B CN106452127 B CN 106452127B CN 201610882110 A CN201610882110 A CN 201610882110A CN 106452127 B CN106452127 B CN 106452127B
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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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
-
- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
- Rectifiers (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
A kind of voltage adjusting method of present invention proposition, device and double IPM module drivers, double IPM module drivers include the first IPM modules and the 2nd IPM modules, and the voltage adjusting method includes：First voltage and second voltage are calculated separately according to prefixed time interval, wherein first voltage is the corresponding DC bus-bar voltage of three-phase input voltage of the first IPM modules, and second voltage is the back-emf voltage of compressor load；The size for comparing the first voltage and the second voltage determines the higher value in the first voltage and the second voltage；The input voltage of the 2nd IPM modules is adjusted according to the higher value.Above-mentioned voltage adjusting method, device and double IPM module drivers can adjust the voltage of double IPM module drivers, to reduce the power attenuation of double IPM module drivers, improve its service life.The efficiency of controller can also be improved, compressor current distortion is reduced.
Description
Technical field
The present invention relates to a kind of intelligent appliance field more particularly to voltage adjusting method, device and double IPM module drives
Device.
Background technology
IPM (Intelligent Power Module, intelligent power module), also known as IPM modules are a kind of power to be opened
The circuit module that device and driving circuit integrate is closed, the frequency converter of driving motor and various inverters are suitable for,
It has been widely used in frequency control, metallurgical machinery, electric propulsion, servo-drive field.Such as more money frequency conversions currently on the market
Household appliances all use double IPM module drivers.
Fig. 1 is a kind of structural topology figure of double IPM module drivers in the prior art.As shown in Figure 1, general frequency-conversion domestic electric appliances
In double IPM module drivers include the controllable IPM modules of rectification side and the controllable IPM modules of inverter side.In the prior art, three-phase is defeated
The alternating voltage entered is converted to rectification side through PFC (Power Factor Correction, PFC) control circuit
PWM (Pulse Width Modulation, pulse width modulation) control signal of each transistor in controllable IPM modules, with control
The break-make of each transistor in the controllable IPM modules of rectification side processed.DC bus-bar voltage is promoted to constant by the controllable IPM modules of rectification side
Value, generally 650V, 650V DC bus-bar voltages pass through the controllable IPM modules of inverter side, are converted to the driving electricity of compressor load
Pressure, for driving compressor operating.Due to the discreteness of compressor load, the size of DC bus-bar voltage directly affects compressor
Current ripples size, busbar voltage utilization rate, IPM switching losses, overload capacity, weak magnetic control, the performances such as component stress.It is existing
There is DC bus-bar voltage constant in technology the loss of double IPM module drivers will to be caused big, to reduce the reliability of electric appliance.
Invention content
In view of this, it is necessary to provide a kind of voltage adjusting method, device and double IPM module drivers, double IPM can be reduced
The power attenuation of module driver promotes reliability.
The invention discloses a kind of voltage adjusting methods, are applied to double IPM module drivers, double IPM module drives
Device includes the first IPM modules and the 2nd IPM modules, and the voltage adjusting method includes：
First voltage and second voltage are calculated separately according to prefixed time interval, wherein first voltage is the first IPM modules
The corresponding DC bus-bar voltage of three-phase input voltage, second voltage be compressor load back-emf voltage；
The size for comparing the first voltage and the second voltage determines in the first voltage and the second voltage
Higher value；
The input voltage of the 2nd IPM modules is adjusted according to the higher value.
As an implementation, after determining the higher value in the first voltage and the second voltage every time, institute
Stating voltage adjusting method further includes：
According to the difference between current higher value and a upper higher value, smoothing factor is calculated；
The input voltage that the 2nd IPM modules are adjusted according to the higher value, specially：
According to the current higher value, a upper higher value and the smoothing factor, the 2nd IPM modules are adjusted
Input voltage.
As an implementation, the difference between the current higher value of the basis and a upper higher value, calculate it is smooth because
Son, including：
The corresponding scale factor of preset range where obtaining the difference；
The product for calculating the corresponding scale factor of the difference, as the smoothing factor.
It is as an implementation, described according to the current higher value, a upper higher value and the smoothing factor,
The input voltage of the 2nd IPM modules is adjusted, including：
Judge whether the smoothing factor is zero, is, the input voltage of the 2nd IPM modules, which is adjusted to described, works as
Preceding higher value；
Otherwise by the input voltage of the 2nd IPM modules be adjusted to a upper higher value and the smoothing factor it
With.
As an implementation, it is described calculate separately first voltage and second voltage according to prefixed time interval before,
The voltage adjusting method further includes：
The three-phase input voltage for adjusting the first IPM modules is minimum value；
The input voltage for adjusting the 2nd IPM modules is maximum value；
Judge that double IPM module drivers are according to the loss situation of double IPM module drivers in preset duration
No qualification.
The invention also discloses a kind of voltage regulating devices, are applied to double IPM module drivers, and double IPM modules are driven
Dynamic device includes the first IPM modules and the 2nd IPM modules, and the voltage regulating device includes：
First computing module, for calculating separately first voltage and second voltage according to prefixed time interval, wherein first
Voltage is the corresponding DC bus-bar voltage of three-phase input voltage of the first IPM modules, and second voltage is the anti-electricity of compressor load
EMF voltage；
Comparison module, be used for the first voltage and the second voltage size, determine the first voltage and
Higher value in the second voltage；
Adjustment module, the input voltage for adjusting the 2nd IPM modules according to the higher value.
As an implementation, the voltage regulating device further includes：
Second computing module, after the higher value in determining the first voltage and the second voltage every time,
According to the difference between current higher value and a upper higher value, smoothing factor is calculated；
The adjustment module is additionally operable to, according to the current higher value, a upper higher value and the smoothing factor, adjust
Save the input voltage of the 2nd IPM modules.
As an implementation, second computing module includes：
Acquiring unit, for the corresponding scale factor of preset range where obtaining the difference；
Computing unit, the product for calculating the corresponding scale factor of the difference, as the smoothing factor.
As an implementation, the adjustment module includes judging unit and processing unit,
The judging unit is then by the processing unit by described second for judging whether the smoothing factor is zero
The input voltage of IPM modules is adjusted to the current higher value；Otherwise by the processing unit by the defeated of the 2nd IPM modules
Enter voltage and is adjusted to the sum of a upper higher value and described smoothing factor.
As an implementation, the adjustment module is additionally operable to：Adjust the three-phase input voltage of the first IPM modules
For minimum value；And it is maximum value to adjust the input voltage of the 2nd IPM modules；
Above-mentioned voltage regulating device further includes：Judgment module, for according to double IPM module drivers in preset duration
Loss situation judge whether double IPM module drivers qualified.
Above-mentioned voltage adjusting method, device and double IPM module drivers, can be negative according to three-phase input voltage and compressor
The comparison result of the back-emf voltage of load adjusts the input voltage of the 2nd IPM modules in double IPM module drivers, to drop
The power attenuation of low double IPM module drivers, improves its service life.The efficiency of controller can also be improved, it is electromechanical to reduce compression
Stream distortion.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
The attached drawing of other embodiment is obtained according to these attached drawings.
Fig. 1 is a kind of structural topology figure of double IPM module drivers in the prior art；
Fig. 2 is the flow diagram of the voltage adjusting method of one embodiment of the invention；
Fig. 3 is that voltage adjusting method of the present invention and the power attenuation comparison of prior art Constant Direct Current busbar voltage method are shown
It is intended to；
Fig. 4 is the flow diagram of the voltage adjusting method of another embodiment of the present invention；
Fig. 5 is the flow diagram of the voltage adjusting method of further embodiment of this invention；
Fig. 6 is the flow diagram of the voltage adjusting method of further embodiment of this invention；
Fig. 7 is the voltage regulating device block structure schematic diagram of one embodiment of the invention；
Fig. 8 be another embodiment of the present invention voltage regulating device in the second computing module structural schematic diagram；
Fig. 9 is the structural schematic diagram of double IPM module drivers of one embodiment of the invention.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
In the description of the present invention, it is to be understood that, term " first ", " second " are used for description purposes only, and cannot
It is interpreted as indicating or implies relative importance or implicitly indicate the quantity of indicated technical characteristic.Define as a result, " the
One ", the feature of " second " can explicitly or implicitly include at least one of the features.In the description of the present invention, " multiple "
It is meant that at least two, such as two, three etc., unless otherwise specifically defined.
Voltage adjusting method, device and double IPM module drivers according to the ... of the embodiment of the present invention are described below in conjunction with the accompanying drawings.
Wherein, the voltage adjusting method and device are applied to double IPM module drivers, and double IPM module drivers include first
IPM modules and the 2nd IPM modules, for example, the first IPM modules are the controllable IPM modules of rectification side, the 2nd IPM modules
For the controllable IPM modules of inverter side.
For example, the operation principle of double IPM module drivers is as follows：The supply voltage of three phase mains R, S, T input, warp
Cross three reactor Lr、Ls、LtIt is input to the controllable IPM modules of rectification side (i.e. the first IPM modules), the rectified controllable IPM modules in side
Voltage after rectification is DC bus-bar voltage by the flat waves of capacitance group C1, and the DC bus-bar voltage is as the controllable IPM modules of inverter side
The input voltage of (i.e. the 2nd IPM modules) is exported through the controllable IPM modules inversion of inverter side to load, such as load is PMSM
(permanent magnet synchronous motor, permanent magnet synchronous motor).Wherein resistance R1~R12, amplifier OP1~
OP4 forms sample circuit, for electric current Ir, electric current Is, voltage VtrAnd voltage VrsIt is sampled.DSP (Digital Signal Processing
Device, Digital Signal Processor) output the first IPM modules and the 2nd IPM modules in each transistor PWM (pulses
Width modulated, Pulse Width Modulation) control signal, the duty ratio for controlling each transistor, to control the
The output voltage of one IPM modules and the 2nd IPM modules.
For example, the voltage adjusting method of one embodiment of the invention includes the following steps：It is counted respectively according to prefixed time interval
First voltage and second voltage are calculated, wherein first voltage is the corresponding DC bus electricity of three-phase input voltage of the first IPM modules
Pressure, second voltage are the back-emf voltage of compressor load；Compare the size of the first voltage and the second voltage, really
Higher value in the fixed first voltage and the second voltage；The defeated of the 2nd IPM modules is adjusted according to the higher value
Enter voltage, such as by the input voltage regulation of the 2nd IPM modules is the higher value.
Referring to Fig. 2, its flow diagram for the voltage adjusting method of one embodiment of the invention, the voltage adjusting side
Method is applied to double IPM module drivers.For example, the voltage adjusting method is executed by external voltage regulating device, to adjust
The voltage of double IPM module drivers, for example, the voltage adjusting method adjusts dress by portion's voltage in double IPM module drivers
Set execution.As shown in Fig. 2, the voltage adjusting method includes the following steps：
S110 calculates separately first voltage and second voltage according to prefixed time interval.For example, prefixed time interval is
0.1,0.2,0.5,0.8,1,1.2,1.5,2,3,5,8,10,15,20,30 or 60 second；For example, calculating separately every several seconds
One voltage and second voltage；For example, calculating separately first voltage and second voltage every 1s.
Wherein, first voltage is the corresponding DC bus-bar voltage of three-phase input voltage of the first IPM modules, and second voltage is
The back-emf voltage of compressor load, counter electromotive force refer to that having the tendency that revolting electric current changes and generate electromotive force,
That is the induced electromotive force of compressor coil.In the present embodiment, first voltage is according to the three-phase input voltage meters of the first IPM modules
It obtains, such as first voltage Vdc=A × Vrst, wherein A is the conversion coefficient of input voltage and busbar voltage, can be according to reality
Situation is arranged or modification, such as A=2.45；VrstFor the three-phase input voltage of the first IPM modules, such as the three-phase input voltage
VrstAccording to electric current Ir, electric current Is, voltage VtrAnd voltage VrsIt is calculated.
In the present embodiment, second voltage is calculated according to some electrical parameters of compressor load.For example, according to pressure
The parameters such as electronic resistance, inductor rotor, rotor current, the spinner velocity of contracting machine are calculated.For another example, second voltage VsFor：
Wherein, RsFor compressor stator resistance, LdFor d axis (d-axis) inductance of compressor drum, LqFor compressor drum
Q axis (quadrature axis) inductance, idFor the d shaft currents of compressor drum, iqFor the q shaft currents of compressor drum, ωrFor turning for compressor
Sub- speed, KeFor the back EMF coefficient of compressor.
S130, the size of the first voltage and the second voltage determine the first voltage and described second
Higher value in voltage.
After calculating first voltage and second voltage every time, compares the two size, determine higher value therein.For example, institute
State first voltage VdWith the second voltage VsIn higher value be denoted as Vdc, then Vdc=max (Vd, Vs)。
S150 adjusts the input voltage of the 2nd IPM modules according to the higher value.
For example, being the higher value by the input voltage regulation of the 2nd IPM modules.For another example, to above-mentioned higher value into
The input voltage regulation of the 2nd IPM modules is the voltage value after smoothing techniques by row smoothing techniques.
For example, adjusting the PWM duty cycle of each transistor in the first IPM modules, make three-phase input voltage VrstThrough first
After IPM module rectifications, the voltage value that is promoted to after above-mentioned higher value or above-mentioned smoothing techniques.For another example, according to SVPWM
(Space Vector Pulse Width Modulation, space vector pulse width modulation) rule adjusts the first IPM modules
In each transistor PWM duty cycle.
By taking double IPM module drivers in air-conditioning as an example, in the prior art, the controllable IPM modules of prime rectification side carry out three
Phase PFC boost controls, usually that DC bus-bar voltage is constant for 650V.The three-phase of double IPM module drivers is defeated in general air-conditioning
Enter voltage VrstBetween 160v~280v, corresponding conversion DC bus-bar voltage (first voltage) is 391.8v~685.7v.Example
Such as, as three-phase input voltage VrstFor 160v, for compressor when 0.8 times of nominal load is run, corresponding conversion direct current is female
Line voltage, that is, first voltage is 391.8v, second voltage 446V, according to above-mentioned voltage adjusting method, by the 2nd IPM modules
Input voltage regulation is 446V, and busbar voltage need to only be increased to 54.2V, and corresponding duty ratio is 17.2%.And the prior art will
Constant busbar voltage is 650V, needs busbar voltage increasing 258.2v, and corresponding duty ratio is close to maximum limit amplitude 96%.By
It is mainly switching loss and on-state loss in IPM module power-loss, wherein carrier frequency fixation causes switching loss to be fixed, because
The variation of this on-state loss mainly determines that duty ratio is bigger by the duty ratio of pwm control signal, and on-state loss is bigger.Above-mentioned electricity
Press the corresponding duty of adjusting method smaller, to reduce the power attenuation of IPM modules.In addition, under air-conditioning light load condition,
When the controllable IPM modules of rear class inverter side carry out the PMSM controls of compressor, compressor current ripple is big, busbar voltage utilization rate
It is low, busbar voltage is promoted to 650V and unnecessary at this time, causes to waste instead.
Under equal conditions, loss test is carried out to above-mentioned voltage adjusting method and existing constant busbar voltage method,
Test results are shown in figure 3, and as seen from Figure 3, above-mentioned voltage adjusting method compares existing constant busbar voltage method, can be significantly
Reduce the power attenuation of IPM modules.
Above-mentioned voltage adjusting method, can be according to the comparison of three-phase input voltage and the back-emf voltage of compressor load
As a result, the input voltage of the 2nd IPM modules in double IPM module drivers is adjusted, to reduce the power of double IPM module drivers
Loss, improves its service life.The efficiency of controller can also be improved, compressor current distortion is reduced.
In one embodiment, it after executing step S130 every time, also executes the following steps：According to current higher value with it is upper
Difference between one higher value calculates smoothing factor.Wherein, smoothing factor is less than above-mentioned difference.
For example, as shown in figure 4, calculating smoothing factor according to following steps：
S141, the corresponding scale factor of preset range where obtaining the difference.
In the present embodiment, multiple ranges and its corresponding scale factor are pre-set.Calculate every time current higher value with
After difference between a upper higher value, judges the range belonging to the difference and obtain corresponding scale factor.
As an implementation, the difference can also be current higher value and the 2nd IPM modules of last adjusting
The 2nd IPM modules actually enters difference in voltage when input voltage.
S143 calculates the product of the corresponding scale factor of the difference, as the smoothing factor.
For example, above-mentioned difference is denoted as Δ V, above-mentioned smoothing factor is denoted as G (n), and pre-set multiple ranges include：ΔV<
10V, corresponding scale factor f1, G (n)=Δ V × f1；10V≤Δ V < 60V, corresponding scale factor f2, G (n)=Δ V × f2；
60V≤Δ V < 100V, corresponding scale factor f3, G (n)=Δ V × f3；100V≤Δ V < 200V, corresponding scale factor f4, G
(n)=Δ V × f4；Δ V > 200V, corresponding scale factor f5, G (n)=Δ V × f5.Wherein, the aforementioned proportion factor be more than 0 and
No more than 1, above-mentioned difference is bigger, and corresponding scale factor is smaller, for example, 0 f1≤1 < f5 < f4 < f3 < f2 <, for example, f1
=1, f2=0.8；F3=0.6；F4=0.4；F5=0.2.
For another example, as Δ V<When 10V, G (n)=0；As 10V≤Δ V < 60V, G (n)=Δ V/20ms；As 60V≤Δ V
When < 100V, G (n)=Δ V/40ms；As 100V≤Δ V < 200V, G (n)=Δ V/100ms；As Δ V > 200V, G
(n)=Δ V/200ms.
Correspondingly, step S150 is specially：According to the current higher value, a upper higher value and it is described it is smooth because
Son adjusts the input voltage of the 2nd IPM modules.
For example, as shown in figure 5, adjusting the input voltage of the 2nd IPM modules according to following steps：
S151 judges whether the smoothing factor is zero, is to then follow the steps S153, no to then follow the steps S155.
The input voltage of the 2nd IPM modules is adjusted to the current higher value by S153.
In the present embodiment, if the smoothing factor is zero, the difference between current higher value and a upper higher value is indicated
It is smaller, it is smooth without carrying out, therefore the input voltage of the 2nd IPM modules is adjusted to the current higher value.
S155, by the input voltage of the 2nd IPM modules be adjusted to a upper higher value and the smoothing factor it
With.
If the input voltage of the 2nd IPM modules improves rapidly in a short time, big electricity can be caused to the 2nd IPM modules
Stream impact, be easy to cause component damage.In the present embodiment, if the smoothing factor is not zero, indicate current higher value with
Difference between a upper higher value is larger, and the input voltage of the 2nd IPM modules is adjusted to a upper higher value at this time
The sum of with the smoothing factor, since smoothing factor is less than above-mentioned difference, that is, the input voltage of the 2nd IPM modules is less than current
Higher value, therefore be avoided that and heavy current impact is caused to the 2nd IPM modules, extend the physical life of double IPM module drivers.
In one embodiment, before step S110, also the reliability of above-mentioned double IPM module drivers is assessed.
For example, before electronic equipment manufacture, the reliability of above-mentioned double IPM module drivers is assessed.The electronics newly to dispatch from the factory is set
The standby reliability test that can all do standard, it is in the prior art, artificial to carry out electronic component destructive testing and component parameter
Test and screening, it is time-consuming in this way, laborious.In the present embodiment, it for example, as shown in fig. 6, before step S110, also executes such as
Lower step：
S101, the three-phase input voltage for adjusting the first IPM modules are minimum value.
Wherein, above-mentioned minimum value is the minimum value in three-phase input AC voltage range.If for example, double IPM module applications
In convertible frequency air-conditioner, and practical three-phase input voltage ranging from 160~280v of convertible frequency air-conditioner, then by the three-phase of the first IPM modules
Input voltage VrstIt is adjusted to 160V.
S103, the input voltage for adjusting the 2nd IPM modules are maximum value.
Wherein, above-mentioned maximum value is DC bus-bar voltage and the twoth IPM module of the three-phase input voltage to shadow
Recommend the maximum value in voltage range.For example, practical three-phase input voltage ranging from 160~280v of convertible frequency air-conditioner, corresponding
DC bus-bar voltage is 392~686v, and the busbar voltage ranging from 350V of above-mentioned double IPM module drivers manufacturer's recommendeds~
800V, the then input voltage for adjusting the 2nd IPM modules are 800V.
For example, adjusting the PWM duty cycle of each transistor in the first IPM modules, make above-mentioned three-phase input voltage most
Small value is promoted to the maximum value of the input voltage of above-mentioned 2nd IPM modules after the first IPM module rectifications.For example, adjusting institute
The PWM duty cycle for stating each transistor in the first IPM modules makes 160V alternating currents after the first IPM modules, is promoted to the straight of 800V
Flow busbar voltage, the input voltage as the 2nd IPM modules.In this way, the first IPM modules need the voltage value promoted maximum, it is right
Answer the largest duty cycle of each transistor, the loss of corresponding IPM modules also maximum so that double to run to approach absolute rating
IPM module drivers carry out standard reliability experiment.
As an implementation, under conditions of close to absolute rating, make double IPM module drivers in different loads feelings
It is run under condition to verify reliability.For example, double IPM module drivers are applied to convertible frequency air-conditioner, then in 0.1 times of volume of convertible frequency air-conditioner
In the case of fixed load to 2 times of nominal loads, to approach the above-mentioned minimum value and maximum value of absolute rating, double IPM moulds are run repeatedly
Block drive.For example, the three-phase alternating current input voltage for adjusting the first IPM modules is 160V alternating voltages, the 160V alternating voltages
800V (foldings are promoted to PFC control algolithm control bus voltage (i.e. the input voltage of the 2nd IPM modules) through the first IPM modules
It is 327v alternating voltages to calculate), at this point, the PWM duty cycle of corresponding IPM modules control is maximum, the losses of corresponding IPM modules is also most
Greatly.Assuming that when 0.1 times of nominal load, 60V alternating voltages are needed, whens 2 times of nominal loads needs 260V alternating voltages, then 800V
PMSM algorithm of the busbar voltage Jing Guo the controllable IPM modules of inverter side, is depressured to 60V alternating voltages and 260V alternating voltages, herein
In the process, the PWM duty cycle of corresponding IPM modules is also changed with this rule by being up to minimum, the loss of IPM modules.
S105 judges double IPM module drives according to the loss situation of double IPM module drivers in preset duration
Whether device is qualified.
For example, in the process of running, being damaged if there is double IPM module drivers or electronic component, it is judged as double
IPM module driver reliabilities are unqualified, otherwise qualified.If for example, judge that double IPM module drivers are unqualified,
Double IPM module drivers are replaced before electronic equipment manufacture.
Above-mentioned voltage adjusting method, by adjusting the input voltage of double IPM modules, to approach the double operation IPM of absolute rating
Module driver carries out the standard reliability experiment of air-conditioning, verifies the bringing onto load energy of components selection, cooling system, compressor
The reliability of power and voltage adjusting method, greatlys save design cost.
The embodiment of the invention also discloses a kind of voltage regulating device, above-mentioned voltage regulating device is applied to include first
Double IPM module drivers of IPM modules and the 2nd IPM modules.For example, above-mentioned voltage regulating device is for adjusting double IPM moulds
The external voltage regulating device of block drive input voltage, for example, above-mentioned voltage regulating device is in double IPM module drivers
Device, for example, above-mentioned voltage regulating device is realized by the DSP of double IPM module drivers.For example, above-mentioned voltage regulating device is adopted
It is realized with the voltage adjusting method of above-mentioned any embodiment.For example, as shown in fig. 7, above-mentioned voltage regulating device 100 includes：
First computing module 110, for calculating separately first voltage and second voltage according to prefixed time interval, wherein the
One voltage is the corresponding DC bus-bar voltage of three-phase input voltage of the first IPM modules, and second voltage is the anti-of compressor load
EMF voltage；
Comparison module 130 is used for the size of the first voltage and the second voltage, determines the first voltage
With the higher value in the second voltage；
Adjustment module 150, the input voltage for adjusting the 2nd IPM modules according to the higher value.
In one embodiment, above-mentioned voltage regulating device 100 further includes：Second computing module 170, for true every time
After higher value in the fixed first voltage and the second voltage, according to the difference between current higher value and a upper higher value
Value calculates smoothing factor；
The adjustment module 150, be additionally operable to according to the current higher value, a upper higher value and it is described it is smooth because
Son adjusts the input voltage of the 2nd IPM modules.
In one embodiment, as shown in figure 8, the second computing module 170 includes acquiring unit 171 and computing unit 173,
Wherein：
Acquiring unit 171, for the corresponding scale factor of preset range where obtaining the difference；
Computing unit 173, the product for calculating the corresponding scale factor of the difference, as it is described it is smooth because
Son.
In one embodiment, the adjustment module 150 includes judging unit and processing unit, and the judging unit is used for
Judge whether the smoothing factor is zero, is, is adjusted to the input voltage of the 2nd IPM modules by the processing unit
The current higher value；Otherwise by the processing unit by the input voltage of the 2nd IPM modules be adjusted to described upper one compared with
The sum of big value and the smoothing factor.
In one embodiment, the adjustment module 150 is additionally operable to adjust the three-phase input voltage of the first IPM modules
For minimum value；And the input voltage for adjusting the 2nd IPM modules is maximum value；
The voltage regulating device further includes：Judgment module, for according to double IPM module drivers in preset duration
Loss situation judge whether double IPM module drivers qualified.
Further embodiment of this invention is a kind of voltage regulating device, and voltage described in any of the above-described embodiment is used to adjust
Method；For example, a kind of voltage regulating device, uses voltage adjusting method described in any of the above-described embodiment to realize；For another example, a kind of
Voltage regulating device, with the function module corresponding to voltage adjusting method described in any of the above-described embodiment.
Above-mentioned voltage regulating device, can be according to the comparison of three-phase input voltage and the back-emf voltage of compressor load
As a result, the input voltage of the 2nd IPM modules in double IPM module drivers is adjusted, to reduce the power of double IPM module drivers
Loss, improves its service life.The efficiency of controller can also be improved, compressor current distortion is reduced.
The embodiment of the present invention additionally provides a kind of double IPM module drivers, and double IPM module drivers use above-mentioned
Voltage adjusting method described in one embodiment or voltage regulating device are realized.As shown in figure 9, above-mentioned double IPM module drivers 200 are wrapped
The voltage regulating device 100 described in the first IPM modules 210, the 2nd IPM modules 230 and any of the above-described embodiment is included, voltage is adjusted
Device 100 is connect with the first IPM modules 210 and IPM modules 230 respectively.Wherein, the first IPM modules 210 are that rectification side is controllable
IPM modules, the 2nd IPM modules 230 are the controllable IPM modules of inverter side.
Above-mentioned double IPM module drivers, can be according to the back-emf voltage of three-phase input voltage and compressor load
Comparison result adjusts the input voltage of the 2nd IPM modules in double IPM module drivers, to reduce double IPM module drivers
Power attenuation improves its service life.The efficiency of controller can also be improved, compressor current distortion is reduced.
It should be noted that in above-mentioned apparatus embodiment, included modules are only drawn according to function logic
Point, but it is not limited to above-mentioned division, as long as corresponding function can be realized；In addition, each function module is specific
Title is also only to facilitate mutually distinguish, the protection domain being not intended to restrict the invention.
In addition, one of ordinary skill in the art will appreciate that realizing all or part of step in the various embodiments described above method
It is that relevant hardware can be instructed to complete by program, corresponding program can be stored in read/write memory medium, institute
State storage medium, such as ROM/RAM, disk, CD.
Each technical characteristic of embodiment described above can be combined arbitrarily, to keep description succinct, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, it is all considered to be the range of this specification record.
Several embodiments of the invention above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Range.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (8)
1. a kind of voltage adjusting method, is applied to double IPM module drivers, double IPM module drivers include the first IPM moulds
Block and the 2nd IPM modules, which is characterized in that the voltage adjusting method includes：
First voltage and second voltage are calculated separately according to prefixed time interval, wherein first voltage is the three of the first IPM modules
The corresponding DC bus-bar voltage of phase input voltage, second voltage are the back-emf voltage of compressor load；
The size for comparing the first voltage and the second voltage, determine in the first voltage and the second voltage compared with
Big value；
According to the difference between current higher value and a upper higher value, smoothing factor is calculated；
According to the current higher value, a upper higher value and the smoothing factor, the input of the 2nd IPM modules is adjusted
Voltage.
2. voltage adjusting method as described in claim 1, which is characterized in that the current higher value of basis and a upper higher value it
Between difference, calculate smoothing factor, including：
The corresponding scale factor of preset range where obtaining the difference；
The product for calculating the corresponding scale factor of the difference, as the smoothing factor.
3. voltage adjusting method as described in claim 1, which is characterized in that described according to the current higher value, described upper one
Higher value and the smoothing factor adjust the input voltage of the 2nd IPM modules, including：
Judge whether the smoothing factor is zero, is, by the input voltage of the 2nd IPM modules be adjusted to it is described currently compared with
Big value；
Otherwise the input voltage of the 2nd IPM modules is adjusted to the sum of described upper higher value and the smoothing factor.
4. the voltage adjusting method as described in any one of claims 1 to 3, which is characterized in that described according to prefixed time interval
Before calculating separately first voltage and second voltage, the voltage adjusting method further includes：
The three-phase input voltage for adjusting the first IPM modules is minimum value；
The input voltage for adjusting the 2nd IPM modules is maximum value；
Judge whether double IPM module drivers close according to the loss situation of double IPM module drivers in preset duration
Lattice.
5. a kind of voltage regulating device, is applied to double IPM module drivers, double IPM module drivers include the first IPM moulds
Block and the 2nd IPM modules, which is characterized in that the voltage regulating device includes：
First computing module, for calculating separately first voltage and second voltage, wherein first voltage according to prefixed time interval
For the corresponding DC bus-bar voltage of three-phase input voltage of the first IPM modules, second voltage is the counter electromotive force of compressor load
Voltage；
Comparison module is used for the size of the first voltage and the second voltage, determines the first voltage and described
Higher value in second voltage；
Second computing module, after the higher value in determining the first voltage and the second voltage every time, according to
The currently difference between higher value and a upper higher value calculates smoothing factor；
Adjustment module, for according to the current higher value, a upper higher value and the smoothing factor, adjusting described second
The input voltage of IPM modules.
6. voltage regulating device as claimed in claim 5, which is characterized in that second computing module includes：
Acquiring unit, for the corresponding scale factor of preset range where obtaining the difference；
Computing unit, the product for calculating the corresponding scale factor of the difference, as the smoothing factor.
7. voltage regulating device as claimed in claim 5, which is characterized in that the adjustment module includes that judging unit and processing are single
Member,
The judging unit is then by the processing unit by the 2nd IPM for judging whether the smoothing factor is zero
The input voltage of module is adjusted to the current higher value；Otherwise by the processing unit by the input of the 2nd IPM modules
Voltage is adjusted to the sum of a upper higher value and described smoothing factor.
8. a kind of double IPM module drivers, which is characterized in that including the first IPM modules, the 2nd IPM modules and such as claim 5
To any one of 7 voltage regulating devices, the voltage regulating device respectively with the first IPM modules and described second
IPM modules connect.
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| CN110149083A (en) * | 2018-02-12 | 2019-08-20 | 西安中车永电捷通电气有限公司 | Inversion major loop and permanent magnet synchronous motor transmission system |
| CN110739676A (en) * | 2019-10-18 | 2020-01-31 | 珠海格力电器股份有限公司 | Method and device for adjusting direct-current bus voltage |
| CN111490673B (en) * | 2020-05-21 | 2021-02-09 | 四川虹美智能科技有限公司 | Output voltage control method and device |
| CN111628659A (en) * | 2020-06-05 | 2020-09-04 | 浙江鲲悟科技有限公司 | Compressor variable frequency speed regulating system and control method of direct current bus voltage |
| CN111884523B (en) * | 2020-08-07 | 2021-11-19 | 浙江鲲悟科技有限公司 | Power conversion system |
| CN114216244B (en) * | 2021-11-29 | 2022-11-25 | 珠海格力电器股份有限公司 | Compressor bus voltage adjusting method and device and compressor |
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