CN106452127A - Voltage adjusting method and device, and dual-IPM module driver - Google Patents
Voltage adjusting method and device, and dual-IPM module driver Download PDFInfo
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- CN106452127A CN106452127A CN201610882110.4A CN201610882110A CN106452127A CN 106452127 A CN106452127 A CN 106452127A CN 201610882110 A CN201610882110 A CN 201610882110A CN 106452127 A CN106452127 A CN 106452127A
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Classifications
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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
Abstract
The invention provides a voltage adjusting method and device, and a dual-IPM module driver. The dual IPM module driver comprises a first IPM module and a second IPM module. The voltage adjusting method comprises the steps as follows: first voltage and second voltage are separately calculated according to a preset time interval, wherein the first voltage is DC bus voltage corresponding to three-phase input voltage of the first IPM module and the second voltage is counter electromotive force voltage loaded by a compressor; the first voltage is compared with the second voltage and a greater value in the first voltage and the second voltage is determined; and input voltage of the second IPM module is adjusted according to the greater value. According to the voltage adjusting method and device, and the dual-IPM module driver, the voltage of the dual-IPM module driver can be adjusted, so that the power loss of the dual-IPM module driver is reduced, the service life is prolonged, the efficiency of the controller can be improved and current distortion of the compressor is reduced.
Description
Technical field
The present invention relates to intelligent appliance field, more particularly, to a kind of voltage adjusting method, device and double IPM module drive
Device.
Background technology
IPM (Intelligent Power Module, SPM), also known as IPM module, is that one kind opens power
Close the circuit module that device and drive circuit integrate, it is suitable for the converter of motor and various inverter,
It has been widely used in frequency control, metallurgical machinery, electric propulsion, servo-drive field.Such as many moneys frequency conversion in the market
Household appliances all employ double IPM module driver.
Fig. 1 is the structural topology figure of a kind of pair of IPM module driver in prior art.As shown in figure 1, general frequency-conversion domestic electric appliances
In double IPM module driver include rectification side controlled IPM module and inverter side controlled IPM module.In prior art, three-phase is defeated
The alternating voltage entering, through PFC (Power Factor Correction, PFC) control circuit, is converted to rectification side
PWM (Pulse Width Modulation, the pulse width modulation) control signal of each transistor in controlled IPM module, to control
The break-make of each transistor in the controlled IPM module of rectification side processed.DC bus-bar voltage is promoted to constant by rectification side controlled IPM module
Value, generally 650V, 650V DC bus-bar voltage, through inverter side controlled IPM module, is 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 loss, overload capacity, weak magnetic control, the performance such as components and parts stress.Existing
There is constant DC bus-bar voltage in technology that the loss of pair IPM module driver will be led to big, thus reducing the reliability of electrical equipment.
Content of the invention
In view of this it is necessary to provide a kind of voltage adjusting method, device and double IPM module driver, double IPM can be reduced
The power attenuation of module driver, lifts reliability.
The invention discloses a kind of voltage adjusting method, it is applied to double IPM module driver, described pair of IPM module drive
Device includes an IPM module and the 2nd IPM module, and described voltage adjusting method includes：
Calculate first voltage and second voltage according to prefixed time interval respectively, wherein first voltage is an IPM module
The corresponding DC bus-bar voltage of three-phase input voltage, second voltage be compressor load back-emf voltage；
Compare the size of described first voltage and described second voltage, determine in described first voltage and described second voltage
Higher value；
Adjust the input voltage of described 2nd IPM module according to described higher value.
As a kind of embodiment, after determining the higher value in described first voltage and described second voltage every time, institute
State voltage adjusting method also to include：
According to the difference between current higher value and a upper higher value, calculate smoothing factor；
The described input voltage adjusting described 2nd IPM module according to described higher value, specially：
According to described current higher value, a described upper higher value and described smoothing factor, adjust described 2nd IPM module
Input voltage.
As a kind of embodiment, the difference between the described current higher value of basis and a upper higher value, calculate smooth because
Son, including：
Obtain the corresponding scale factor of preset range that described difference is located；
Calculate the product of the corresponding scale factor of described difference, as described smoothing factor.
As a kind of embodiment, described according to described current higher value, a described upper higher value and described smoothing factor,
Adjust the input voltage of described 2nd IPM module, including：
Judge whether described smoothing factor is zero, be, the input voltage of described 2nd IPM module is adjusted to described and works as
Front higher value；
Otherwise by the input voltage of described 2nd IPM module be adjusted to a described upper higher value and described smoothing factor it
With.
As a kind of embodiment, described calculate first voltage and second voltage respectively according to prefixed time interval before,
Described voltage adjusting method also includes：
The three-phase input voltage adjusting a described IPM module is minima；
The input voltage adjusting described 2nd IPM module is maximum；
Judge that described pair of IPM module driver is according to the loss situation of described pair of IPM module driver in preset duration
No qualified.
The invention also discloses a kind of voltage regulating device, it is applied to double IPM module driver, described pair of IPM module is driven
Dynamic device includes an IPM module and the 2nd IPM module, and described voltage regulating device includes：
First computing module, for calculating first voltage and second voltage respectively according to prefixed time interval, wherein first
Voltage is the corresponding DC bus-bar voltage of three-phase input voltage of an IPM module, and second voltage is the anti-electricity of compressor load
EMF voltage；
Comparison module, for the size of relatively described first voltage and described second voltage, determine described first voltage and
Higher value in described second voltage；
Adjustment module, for adjusting the input voltage of described 2nd IPM module according to described higher value.
As a kind of embodiment, described voltage regulating device also includes：
Second computing module, for after each higher value determining in described first voltage and described second voltage,
According to the difference between current higher value and a upper higher value, calculate smoothing factor；
Described adjustment module, is additionally operable to, according to described current higher value, a described upper higher value and described smoothing factor, adjust
Save the input voltage of described 2nd IPM module.
As a kind of embodiment, described second computing module includes：
Acquiring unit, for obtaining the corresponding scale factor of preset range that described difference is located；
Computing unit, for calculating the product of the corresponding scale factor of described difference, as described smoothing factor.
As a kind of embodiment, described adjustment module includes judging unit and processing unit,
Described judging unit is used for judging whether described smoothing factor is zero, is then by described second by described processing unit
The input voltage of IPM module is adjusted to described current higher value；Otherwise by described processing unit, described 2nd IPM module is defeated
Entering Voltage Cortrol is a described upper higher value and described smoothing factor sum.
As a kind of embodiment, described adjustment module is additionally operable to：Adjust the three-phase input voltage of a described IPM module
For minima；And, the input voltage adjusting described 2nd IPM module is maximum；
Above-mentioned voltage regulating device also includes：Judge module, for according to described pair of IPM module driver in preset duration
Loss situation judge whether described pair of IPM module driver qualified.
Above-mentioned voltage adjusting method, device and double IPM module driver, can bear according to three-phase input voltage and compressor
The comparative result of the back-emf voltage carrying, adjusts the input voltage of the 2nd IPM module in double IPM module driver, thus dropping
The power attenuation of low pair of IPM module driver, improves its service life.The efficiency of controller can also be improved, reduce compression dynamo-electric
Stream distortion.
Brief description
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Have technology description in required use accompanying drawing be briefly described it should be apparent that, drawings in the following description be only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, acceptable
Obtain the accompanying drawing of other embodiment according to these accompanying drawings.
Fig. 1 is the structural topology figure of a kind of pair of IPM module driver in prior art；
Fig. 2 is the schematic flow sheet of the voltage adjusting method of one embodiment of the invention；
Fig. 3 is that voltage adjusting method of the present invention is shown with the power attenuation contrast of prior art Constant Direct Current busbar voltage method
It is intended to；
Fig. 4 is the schematic flow sheet of the voltage adjusting method of another embodiment of the present invention；
Fig. 5 is the schematic flow sheet of the voltage adjusting method of further embodiment of this invention；
Fig. 6 is the schematic flow sheet 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 is the structural representation of the second computing module in the voltage regulating device of another embodiment of the present invention；
Fig. 9 is the structural representation of double IPM module driver of one embodiment of the invention.
Specific embodiment
In order that the objects, technical solutions and advantages of the present invention become more apparent, below in conjunction with drawings and Examples, right
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only in order to explain the present invention, and
It is not used in the restriction present invention.
In describing the invention it is to be understood that term " first ", " second " are only used for describing purpose, and can not
It is interpreted as indicating or imply relative importance or the implicit quantity indicating indicated technical characteristic.Thus, define " the
One ", the feature of " second " can be expressed or implicitly include at least one this feature.In describing the invention, " multiple "
It is meant that at least two, such as two, three etc., unless otherwise expressly limited specifically.
Voltage adjusting method according to embodiments of the present invention, device and double IPM module driver are described below in conjunction with the accompanying drawings.
Wherein, described voltage adjusting method and device are applied to double IPM module driver, and described pair of IPM module driver includes first
IPM module and the 2nd IPM module, for example, a described IPM module is rectification side controlled IPM module, described 2nd IPM module
For inverter side controlled IPM module.
For example, the operation principle of described pair of IPM module driver is as follows：The supply voltage of three phase mains R, S, T input, warp
Cross three reactor Lr、Ls、LtIt is input to rectification side controlled IPM module (i.e. an IPM module), the controlled IPM module in rectified side
Voltage after rectification, is DC bus-bar voltage by the flat ripple of capacitance group C1, this DC bus-bar voltage is as inverter side controlled IPM module
The input voltage of (i.e. the 2nd IPM module), exports to load through inverter side controlled IPM module inversion, for example, loads as PMSM
(permanent magnet synchronous motor, permagnetic synchronous motor).Wherein resistance R1～R12, amplifier OP1～
OP4 forms sample circuit, for electric current Ir, electric current Is, voltage VtrAnd voltage VrsSampled.DSP (Digital Signal Processing
Device, Digital Signal Processor) PWM (pulse of each transistor in output the first IPM module and the 2nd IPM module
Width modulated, Pulse Width Modulation) control signal, for controlling the dutycycle of each transistor, thus controlling
One IPM module and the output voltage of the 2nd IPM module.
For example, the voltage adjusting method of one embodiment of the invention comprises the following steps：Count respectively according to prefixed time interval
Calculate first voltage and second voltage, wherein first voltage is the three-phase input voltage corresponding dc bus electricity of an IPM module
Pressure, second voltage is the back-emf voltage of compressor load；Compare the size of described first voltage and described second voltage, really
Higher value in fixed described first voltage and described second voltage；The defeated of described 2nd IPM module is adjusted according to described higher value
Enter voltage, be such as described higher value by the input voltage regulation of described 2nd IPM module.
Refer to Fig. 2, it is the schematic flow sheet of the voltage adjusting method of one embodiment of the invention, described voltage-regulation side
Method is applied to double IPM module driver.For example, described voltage adjusting method is executed by external voltage adjusting means, in order to adjust
The voltage of double IPM module driver, for example, described voltage adjusting method is by the portion's voltage-regulation dress in double IPM module driver
Put execution.As shown in Fig. 2 described voltage adjusting method comprises the following steps：
S110, calculates first voltage and second voltage respectively according to prefixed time interval.For example, prefixed time interval is
0.1st, 0.2,0.5,0.8,1,1.2,1.5,2,3,5,8,10,15,20,30 or 60 seconds；For example, calculate respectively every some seconds
One voltage and second voltage；For example, first voltage and second voltage are calculated respectively every 1s.
Wherein, first voltage is the corresponding DC bus-bar voltage of three-phase input voltage of an IPM module, and second voltage is
The back-emf voltage of compressor load, counter electromotive force refers to revolt the trend that changes of electric current and produces electromotive force,
The i.e. induction electromotive force of compressor coil.In the present embodiment, first voltage is according to the three-phase input voltage meter of an IPM module
Obtain, for example first voltage Vdc=A × Vrst, wherein A is the conversion coefficient of input voltage and busbar voltage, can be according to reality
Situation setting or modification, such as A=2.45；VrstFor the three-phase input voltage of an IPM module, such as this 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 the electronic resistance of contracting machine, inductor rotor, rotor current, spinner velocity are calculated.And for example, second voltage VsFor：
Wherein, RsFor compressor stator resistance, LdFor d axle (d-axis) inductance of compressor drum, LqFor compressor drum
Q axle (quadrature axis) inductance, idFor the d shaft current of compressor drum, iqFor the q shaft current of compressor drum, ωrTurning for compressor
Sub- speed, KeBack EMF coefficient for compressor.
S130, the relatively size of described first voltage and described second voltage, determine described first voltage and described second
Higher value in voltage.
After calculating first voltage and second voltage every time, compare both sizes, determine higher value therein.For example, institute
State first voltage VdWith described second voltage VsIn higher value be designated as Vdc, then Vdc=max (Vd, Vs).
S150, adjusts the input voltage of described 2nd IPM module according to described higher value.
For example, by the input voltage regulation of described 2nd IPM module be described higher value.And for example, above-mentioned higher value is entered
Row smoothing techniques, the input voltage regulation of described 2nd IPM module is the magnitude of voltage after smoothing techniques.
For example, adjust the PWM duty cycle of each transistor in a described IPM module, make three-phase input voltage VrstThrough first
After IPM module rectification, it is promoted to the magnitude of voltage after above-mentioned higher value or above-mentioned smoothing techniques.And for example, according to SVPWM
(Space Vector Pulse Width Modulation, space vector pulse width modulation) rule adjusts a described IPM module
In each transistor PWM duty cycle.
Taking the double IPM module driver in air-conditioning as a example, in prior art, prime rectification side controlled IPM module carries out three
Phase PFC boost controls, generally by constant for DC bus-bar voltage for 650V.In general air-conditioning, the three-phase of double IPM module driver is defeated
Enter voltage VrstBetween 160v～280v, corresponding conversion DC bus-bar voltage (first voltage) is 391.8v～685.7v.Example
As three-phase input voltage VrstFor 160v, when compressor runs in the case of 0.8 times of nominal load, corresponding conversion direct current is female
Line voltage is first voltage is 391.8v, and second voltage is 446V, according to above-mentioned voltage adjusting method, by the 2nd IPM module
Input voltage regulation is 446V, only busbar voltage need to be raised 54.2V, and corresponding dutycycle is 17.2%.And prior art will
Busbar voltage constant for 650V, need for busbar voltage to raise 258.2v, corresponding dutycycle 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 leads to switching loss to be fixed, because
The change of this on-state loss mainly determines, dutycycle is bigger, and on-state loss is bigger by the dutycycle of pwm control signal.Above-mentioned electricity
The pressure corresponding duty of control method is smaller, thus reducing the power attenuation of IPM module.Additionally, under air-conditioning light load condition,
When rear class inverter side controlled IPM module is compressed the PMSM control of machine, compressor current ripple is big, busbar voltage utilization rate
Low, now busbar voltage is risen to 650V simultaneously unnecessarily, cause on the contrary to waste.
Under equal conditions, loss test is carried out to above-mentioned voltage adjusting method and existing constant busbar voltage method,
As shown in figure 3, as seen from Figure 3, above-mentioned voltage adjusting method compares existing constant busbar voltage method to test result, can be significantly
Reduce the power attenuation of IPM module.
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, adjust the input voltage of the 2nd IPM module in double IPM module driver, thus reducing the power of double IPM module driver
Loss, improves its service life.The efficiency of controller can also be improved, reduce compressor current distortion.
In one embodiment, after each execution step S130, also execute the following steps：According to current higher value with 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, obtains the corresponding scale factor of preset range that described difference is located.
In the present embodiment, multiple scopes and its corresponding scale factor are pre-set.Calculate every time current higher value with
After difference between a upper higher value, judge the scope belonging to this difference and obtain corresponding scale factor.
As a kind of embodiment, described difference can also be current higher value and last regulation the 2nd IPM module
During input voltage, the 2nd IPM module actually enters difference in voltage.
S143, calculates the product of the corresponding scale factor of described difference, as described smoothing factor.
For example, above-mentioned difference is designated as Δ V, and above-mentioned smoothing factor is designated as G (n), and the multiple scopes pre-setting 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
It is not more than 1, above-mentioned difference is bigger, and corresponding scale factor is less, for example, 0 ＜ f5 ＜ f4 ＜ f3 ＜ f2 ＜ f1≤1, for example, f1
=1, f2=0.8；F3=0.6；F4=0.4；F5=0.2.
And for example, as Δ V<During 10V, G (n)=0；As 10V≤Δ V ＜ 60V, G (n)=Δ V/20ms；As 60V≤Δ V
During ＜ 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 described current higher value, a described upper higher value and described smooth because
Son, adjusts the input voltage of described 2nd IPM module.
For example, as shown in figure 5, adjust the input voltage of described 2nd IPM module according to following steps：
S151, judges whether described smoothing factor is zero, is then execution step S153, otherwise execution step S155.
S153, the input voltage of described 2nd IPM module is adjusted to described current higher value.
In the present embodiment, if described smoothing factor is zero, represent the difference between current higher value and a upper higher value
Less, need not be smoothed, therefore the input voltage of described 2nd IPM module is adjusted to described current higher value.
S155, by the input voltage of described 2nd IPM module be adjusted to a described upper higher value and described smoothing factor it
With.
If the input voltage of described 2nd IPM module improves rapidly at short notice, big electricity can be caused to the 2nd IPM module
Stream impact, easily causes component damage.In the present embodiment, if described smoothing factor is not zero, represent current higher value with
Difference between a upper higher value is larger, now the input voltage of described 2nd IPM module is adjusted to a described upper higher value
With described smoothing factor sum, because smoothing factor is less than above-mentioned difference, i.e. the input voltage of the 2nd IPM module is less than current
Higher value, is therefore avoided that and the 2nd IPM module is caused with heavy current impact, extends the physical life of double IPM module driver.
In one embodiment, before step S110, also the reliability of above-mentioned pair of IPM module driver is estimated.
For example, before electronic equipment dispatches from the factory, the reliability of above-mentioned pair of IPM module driver is estimated.The electronics newly dispatching from the factory sets
The standby reliability test that all can do standard, in prior art, manually carries out electronic devices and components destructive testing and component parameter
Test and screening, so time-consuming, laborious.In the present embodiment, for example, as shown in fig. 6, before step S110, also executing such as
Lower step：
S101, the three-phase input voltage adjusting a described IPM module is minima.
Wherein, above-mentioned minima is the minima in three-phase input AC voltage range.For example, if double IPM module application
In convertible frequency air-conditioner, and the actual three-phase input voltage scope of convertible frequency air-conditioner is 160～280v, then by the three-phase of an IPM module
Input voltage VrstIt is adjusted to 160V.
S103, the input voltage adjusting described 2nd IPM module is maximum.
Wherein, above-mentioned maximum is three-phase input voltage to the DC bus-bar voltage of shadow and described 2nd IPM module
Recommend the maximum in voltage range.For example, the actual three-phase input voltage scope of convertible frequency air-conditioner is 160～280v, corresponding
DC bus-bar voltage be 392～686v, and the busbar voltage scope of above-mentioned pair of IPM module driver manufacturer's recommended be 350V～
800V, then the input voltage adjusting described 2nd IPM module is 800V.
For example, adjust the PWM duty cycle of each transistor in a described IPM module, make above-mentioned three-phase input voltage
After little value is through an IPM module rectification, it is promoted to the maximum of the input voltage of above-mentioned 2nd IPM module.For example, adjust institute
State the PWM duty cycle of each transistor in an IPM module, make 160V alternating current after an IPM module, be promoted to the straight of 800V
Stream busbar voltage, as the input voltage of the 2nd IPM module.So, an IPM module needs the magnitude of voltage of lifting maximum, right
Should each transistor largest duty cycle, the loss of corresponding IPM module also maximum so that double to run close to absolute rating
IPM module driver, carries out standard reliability test.
As a kind of embodiment, under conditions of absolute rating, make double IPM module driver in different loads feelings
Run under condition to verify reliability.For example, double IPM module driver are applied to convertible frequency air-conditioner, then in 0.1 times of volume of convertible frequency air-conditioner
Fixed load to 2 times of nominal loads, close to the above-mentioned minima of absolute rating and maximum, repeatedly to run double IPM moulds
Block drive.For example, the three-phase alternating current input voltage adjusting an IPM module is 160V alternating voltage, this 160V alternating voltage
Through an IPM module, 800V (folding is promoted to PFC control algolithm control bus voltage (i.e. the input voltage of the 2nd IPM module)
Calculate as 327v alternating voltage), now, the PWM duty cycle that corresponding IPM module controls is maximum, and the loss of corresponding IPM module is also
Greatly.When assuming 0.1 times of nominal load, need 60V alternating voltage, during 2 times of nominal loads, need 260V alternating voltage, then 800V
Busbar voltage, through the PMSM algorithm of inverter side controlled IPM module, is depressured to 60V alternating voltage and 260V alternating voltage, here
During, the PWM duty cycle of corresponding IPM module is also changed with this rule by being up to minimum, the loss of IPM module.
S105, judges described pair of IPM module drive according to the loss situation of described pair of IPM module driver in preset duration
Whether device is qualified.
For example, in running, damage if there is double IPM module driver or electronic devices and components, be judged as double
IPM module driver reliability is unqualified, otherwise qualified.For example, if judging, described pair of IPM module driver is unqualified,
Double IPM module driver changed by electronic equipment before dispatching from the factory.
Above-mentioned voltage adjusting method, by the input voltage of the double IPM module of adjustment, with close to absolute rating double operation IPM
Module driver, carries out the standard reliability test of air-conditioning, checking components selection, cooling system, the bringing onto load energy of compressor
Power and the reliability of voltage adjusting method, greatly save design cost.
The embodiment of the invention also discloses a kind of voltage regulating device, above-mentioned voltage regulating device is applied to including first
IPM module and double IPM module driver of the 2nd IPM module.For example, above-mentioned voltage regulating device is for adjusting double IPM moulds
The external voltage adjusting means of block drive input voltage, for example, above-mentioned voltage regulating device is in double IPM module driver
Device, for example, above-mentioned voltage regulating device is realized by the DSP of double IPM module driver.For example, above-mentioned voltage regulating device is adopted
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 first voltage and second voltage respectively according to prefixed time interval, wherein
One voltage is the corresponding DC bus-bar voltage of three-phase input voltage of an IPM module, and second voltage is the anti-of compressor load
EMF voltage；
Comparison module 130, for the size of relatively described first voltage and described second voltage, determines described first voltage
With the higher value in described second voltage；
Adjustment module 150, for adjusting the input voltage of described 2nd IPM module according to described higher value.
In one embodiment, above-mentioned voltage regulating device 100 also includes：Second computing module 170, for true every time
After higher value in fixed described first voltage and described second voltage, according to the difference between current higher value and a upper higher value
Value, calculates smoothing factor；
Described adjustment module 150, be additionally operable to according to described current higher value, a described upper higher value and described smooth because
Son, adjusts the input voltage of described 2nd IPM module.
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 obtaining the corresponding scale factor of preset range that described difference is located；
Computing unit 173, for calculating the product of the corresponding scale factor of described difference, as described smooth because
Son.
In one embodiment, described adjustment module 150 includes judging unit and processing unit, and described judging unit is used for
Judge whether described smoothing factor is zero, be, by described processing unit, the input voltage of described 2nd IPM module is adjusted to
Described current higher value；Otherwise by described processing unit, the input voltage of described 2nd IPM module is adjusted to described upper one relatively
Big value and described smoothing factor sum.
In one embodiment, described adjustment module 150 is additionally operable to adjust the three-phase input voltage of a described IPM module
For minima；And, the input voltage for adjusting described 2nd IPM module is maximum；
Described voltage regulating device also includes：Judge module, for according to described pair of IPM module driver in preset duration
Loss situation judge whether described pair of IPM module driver qualified.
Further embodiment of this invention is, a kind of voltage regulating device, and it adopts voltage-regulation described in any of the above-described embodiment
Method；For example, a kind of voltage regulating device, it adopts voltage adjusting method described in any of the above-described embodiment to realize；And for example, a kind of
Voltage regulating device, it has the functional module described in any of the above-described embodiment corresponding to voltage adjusting method.
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, adjust the input voltage of the 2nd IPM module in double IPM module driver, thus reducing the power of double IPM module driver
Loss, improves its service life.The efficiency of controller can also be improved, reduce compressor current distortion.
The embodiment of the present invention additionally provides a kind of pair of IPM module driver, and described pair of IPM module driver adopts above-mentioned
Voltage adjusting method described in one embodiment or voltage regulating device are realized.As shown in figure 9, above-mentioned pair of IPM module driver 200 is wrapped
Include an IPM module 210, the 2nd IPM module 230 and the voltage regulating device 100 described in any of the above-described embodiment, voltage-regulation
Device 100 is connected with an IPM module 210 and IPM module 230 respectively.Wherein, an IPM module 210 is that rectification side is controlled
IPM module, the 2nd IPM module 230 is inverter side controlled IPM module.
Above-mentioned pair of IPM module driver, can be according to the back-emf voltage of three-phase input voltage and compressor load
Comparative result, adjusts the input voltage of the 2nd IPM module in double IPM module driver, thus reducing double IPM module driver
Power attenuation, improves its service life.The efficiency of controller can also be improved, reduce compressor current distortion.
It should be noted that in said apparatus embodiment, included modules simply carry out drawing according to function logic
Point, but it is not limited to above-mentioned division, as long as being capable of corresponding function；In addition, each functional module is concrete
Title also only to facilitate mutual distinguish, is not limited to protection scope of the present 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
The program that can be by complete come the hardware to instruct correlation, and corresponding program can be stored in read/write memory medium, institute
State storage medium, such as ROM/RAM, disk, CD etc..
Each technical characteristic of embodiment described above can arbitrarily be combined, for making description succinct, not to above-mentioned reality
The all possible combination of each technical characteristic applied in example is all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all it is considered to be the scope of this specification record.
Embodiment described above only have expressed the several embodiments of the present invention, and its description is more concrete and detailed, but simultaneously
Can not 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
Say, without departing from the inventive concept of the premise, some deformation can also be made and improve, these broadly fall into the protection of the present invention
Scope.Therefore, the protection domain of patent of the present invention should be defined by claims.
Claims (10)
1. a kind of voltage adjusting method, is applied to double IPM module driver, and described pair of IPM module driver includes an IPM mould
Block and the 2nd IPM module are it is characterised in that described voltage adjusting method includes：
Calculate first voltage and second voltage according to prefixed time interval respectively, wherein first voltage is the three of an IPM module
The corresponding DC bus-bar voltage of phase input voltage, second voltage is the back-emf voltage of compressor load；
Compare the size of described first voltage and described second voltage, determine in described first voltage and described second voltage relatively
Big value；
Adjust the input voltage of described 2nd IPM module according to described higher value.
2. voltage adjusting method as claimed in claim 1 is it is characterised in that determine described first voltage and described second electricity every time
After higher value in pressure, described voltage adjusting method also includes：
According to the difference between current higher value and a upper higher value, calculate smoothing factor；
The described input voltage adjusting described 2nd IPM module according to described higher value, specially：
According to described current higher value, a described upper higher value and described smoothing factor, adjust the input of described 2nd IPM module
Voltage.
3. voltage adjusting method as claimed in claim 2 it is characterised in that the current higher value of described basis and a upper higher value it
Between difference, calculate smoothing factor, including：
Obtain the corresponding scale factor of preset range that described difference is located；
Calculate the product of the corresponding scale factor of described difference, as described smoothing factor.
4. voltage adjusting method as claimed in claim 2 it is characterised in that described according to described current higher value, described upper one
Higher value and described smoothing factor, adjust the input voltage of described 2nd IPM module, including：
Judge whether described smoothing factor is zero, be, by the input voltage of described 2nd IPM module be adjusted to described current relatively
Big value；
Otherwise the input voltage of described 2nd IPM module is adjusted to a described upper higher value and described smoothing factor sum.
5. as any one of Claims 1-4 voltage adjusting method it is characterised in that described according to prefixed time interval
Before calculating first voltage and second voltage respectively, described voltage adjusting method also includes：
The three-phase input voltage adjusting a described IPM module is minima；
The input voltage adjusting described 2nd IPM module is maximum；
Judge whether described pair of IPM module driver closes according to the loss situation of described pair of IPM module driver in preset duration
Lattice.
6. a kind of voltage regulating device, is applied to double IPM module driver, and described pair of IPM module driver includes an IPM mould
Block and the 2nd IPM module are it is characterised in that described voltage regulating device includes：
First computing module, for calculating first voltage and second voltage, wherein first voltage respectively according to prefixed time interval
For the corresponding DC bus-bar voltage of three-phase input voltage of an IPM module, second voltage is the counter electromotive force of compressor load
Voltage；
Comparison module, for the size of relatively described first voltage and described second voltage, determines described first voltage and described
Higher value in second voltage；
Adjustment module, for adjusting the input voltage of described 2nd IPM module according to described higher value.
7. voltage regulating device as claimed in claim 6 is it is characterised in that described voltage regulating device also includes：
Second computing module, for after each higher value determining in described first voltage and described second voltage, according to
Current difference between higher value and a upper higher value, calculates smoothing factor；
Described adjustment module, is additionally operable to, according to described current higher value, a described upper higher value and described smoothing factor, adjust institute
State the input voltage of the 2nd IPM module.
8. voltage regulating device as claimed in claim 6 is it is characterised in that described second computing module includes：
Acquiring unit, for obtaining the corresponding scale factor of preset range that described difference is located；
Computing unit, for calculating the product of the corresponding scale factor of described difference, as described smoothing factor.
9. voltage regulating device as claimed in claim 7 is it is characterised in that described adjustment module includes judging unit and processes list
Unit,
Described judging unit is used for judging whether described smoothing factor is zero, is then by described 2nd IPM by described processing unit
The input voltage of module is adjusted to described current higher value；Otherwise by described processing unit by the input of described 2nd IPM module
Voltage Cortrol is a described upper higher value and described smoothing factor sum.
10. a kind of pair of IPM module driver is it is characterised in that include an IPM module, the 2nd IPM module and as claim
Voltage regulating device any one of 6 to 9, described voltage regulating device respectively with a described IPM module and described second
IPM module connects.
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| CN106452127B (en) | 2018-11-09 |
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