CN106787919A - A kind of random SVPWM method of Five-phase inverter non-sine - Google Patents

A kind of random SVPWM method of Five-phase inverter non-sine Download PDF

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CN106787919A
CN106787919A CN201710029559.0A CN201710029559A CN106787919A CN 106787919 A CN106787919 A CN 106787919A CN 201710029559 A CN201710029559 A CN 201710029559A CN 106787919 A CN106787919 A CN 106787919A
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reference voltage
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CN106787919B (en
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朱琳
卜飞飞
浦天宇
黄文新
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Nanjing University of Aeronautics and Astronautics
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Nanjing University of Aeronautics and Astronautics
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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
    • H02M7/42—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
    • H02M7/539—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 with automatic control of output wave form or frequency
    • H02M7/5395—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 with automatic control of output wave form or frequency by pulse-width modulation
    • 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
    • H02M1/12—Arrangements for reducing harmonics from ac input or output
    • 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
    • H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
    • H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
    • H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
    • H02P27/08—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters with pulse width modulation
    • H02P27/12—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters with pulse width modulation pulsing by guiding the flux vector, current vector or voltage vector on a circle or a closed curve, e.g. for direct torque control
    • 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
    • H02M1/0048—Circuits or arrangements for reducing losses
    • H02M1/0054—Transistor switching losses
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Abstract

The invention discloses a kind of random SVPWM method of Five-phase inverter non-sine, belong to the technical field of polyphase machine drive control.The present invention chooses two big two middle vectors of vector for surrounding the affiliated sector of fundamental wave reference voltage vector to synthesize fundamental wave reference voltage vector；Synthesize triple-frequency harmonics reference voltage vector in the corresponding voltage vector in triple-frequency harmonics space by selected two big two middle vectors of vector；When vector action time is calculated, within each sampling period, keep that the sampling period is constant, random delay pwm pulse is simultaneously randomly assigned two zero vector action times, realize the double random of switching frequency and zero vector action time.The torque component linear superposition that method disclosed by the invention can produce fundamental current and triple harmonic current in motor, so as to improve the torque density of system, in the case where low-frequency range harmonic performance is not influenceed, substantially reduce the amplitude of higher hamonic wave, suppression electromagnetic interference and high-frequency noise, improve the Electro Magnetic Compatibility of system.

Description

A kind of random SVPWM method of Five-phase inverter non-sine
Technical field
The invention discloses a kind of random SVPWM method of Five-phase inverter non-sine, more particularly to one kind can be same When control fundamental wave and triple-frequency harmonics output and switching frequency and zero vector action time double random Five-phase inverter SVPWM sides Method, belongs to the technical field of polyphase machine drive control.
Background technology
With the development of modern power electronics technology, microelectric technique and control theory, by the department of electrical engineering of Driven by inverter System has had been extricated from the limitation of three phase network, in view of three phase electric machine system occurs in application fields such as high-power, low-voltage, high-currents A series of problems, multi-phase motor system gradually receives more and more attention.Multi-phase motor system is compared to three phase electric machine system System has the advantages that fault-tolerance is strong, reliability is high, torque pulsation is small, it is adaptable to which Aero-Space, ships propulsion, electric automobile etc. are big The occasion that power, reliability requirement are high and performance requirement is high.
The increase of the number of phases allows polyphase machine to provide control freedom degrees more more than three phase electric machine, using increased freedom Spend and the power and torque density of motor can be improved by the method for harmonic component, main theoretical basis of the reform of Chinese economic structure is same number Space (magnetic field) and the torque component rotary frequency that produces of time (electric current) harmonic interactions torque component and the fundamental wave that produce Rate is identical, thus the torque that can be produced with linear superposition fundamental current and higher harmonic current, meanwhile, magnetic potential of air gap and magnetic Mi Feng The reduction of value can be effectively reduced the degree of saturation of iron core, improve the utilization rate of ferromagnetic material.This non-sinusoidal power supply technology Overall performance to improving polyphase machine drive system is significant, also to realizing the basic and key that polyphase machine drives Technology-modulation technique proposes requirement.
Due to space vector pulse width modulation (Space Vector Pulse Width Modulation, SVPWM) algorithm tool There are a clearly physical concept and intuitively calculating process, and be easy to the realization of Digital Control, many scholars are directed to multiphase system Propose polyphase inverter non-sine SVPWM methods.But, current polyphase inverter non-sine SVPWM methods are all using solid Fixed switching frequency controls turning on and off for power device, and it is a large amount of that fixed switching frequency can exist the voltage x current of output Higher hamonic wave, especially at switching frequency and its integral multiple, this causes system EMC to decline and produces obvious height Frequency noise.
Randomized modulation as a kind of optimization hard switching modulation technique, by introducing random factor to on-off circuit PWM, the harmonic energy dispersion that will can be concentrated, effectively reduces the amplitude of higher hamonic wave, obtains more continuous power spectrum, So as to reduce high-frequency noise, effectively suppress Conducted EMI, improve Electro Magnetic Compatibility.The current research for randomized modulation is only It is limited to three-phase system and its subsystem, is not applied to the multiphase system that non-three-phase subsystem is constituted, and is directed to many contraries The non-sine SVPWM methods for becoming device do not account for the improvement of high frequency performance also, the intrinsic problem-electromagnetic interference of traditional PWM with And the integrated distribution of harmonic energy etc. is still present.
The content of the invention
Goal of the invention of the invention is directed to the deficiency of above-mentioned background technology, there is provided a kind of Five-phase inverter non-sine with Machine SVPWM method, controls on the basis of Five-phase inverter output fundamental wave and triple-frequency harmonics at the same time, realizes switch periods Randomization while with zero vector action time, improves the high frequency performance of Five-phase inverter and the spy of harmonic energy integrated distribution Property, the space vector width pulse modulation method for solving existing polyphase inverter does not account for improvement and the biography of high frequency performance also The technical problem that the intrinsic problem of PWM of uniting still is present.
The present invention is adopted the following technical scheme that for achieving the above object：
A kind of random SVPWM method of Five-phase inverter non-sine, comprises the following steps：
A, determine the affiliated sector of fundamental wave reference voltage vector, choose nearest from fundamental wave reference voltage vector in first harmonic spatial Two big middle Vector modulation fundamental wave reference voltage vectors of vector two；
B, as in first harmonic spatial choose two big two middle vectors of vector in triple-frequency harmonics space corresponding to four Voltage vector synthesizes triple-frequency harmonics reference voltage vector；
C, according to two selected in first harmonic spatial big vectors, two middle vectors and realize the purpose of non-sinusoidal power supply It is determined that in first harmonic spatial selected two action time and two action times of middle vector of big vector；
D, in the case where keeping sample frequency constant, random delay pwm pulse is realizing the randomization of switch periods；
E, according to switch periods random value and in the first harmonic spatial in the action time of selected two big vectors and two The action time of vector obtains zero vector action time sum, is randomly assigned zero vector action time sum and obtains each zero vector Action time.
Further, in the random SVPWM method of Five-phase inverter non-sine, the specific method of step A is：Work as fundamental wave Reference voltage vector falls at a certain sector of first harmonic spatial, chosen in first harmonic spatial from fundamental wave reference voltage vector it is nearest two The middle Vector modulation fundamental wave reference voltage vector of individual big vector two： It is fundamental wave reference voltage vector,The selected nearest two big vectors respectively in first harmonic spatial, The action time of selected nearest two big vectors respectively in first harmonic spatial,The institute respectively in first harmonic spatial Nearest two middle vectors of choosing,The action time of selected nearest two middle vectors, T respectively in first harmonic spatialsw It is switch periods random value.
Further, in the random SVPWM method of Five-phase inverter non-sine, the specific method of step B is：In base Selected nearest two big vectors in ripple spaceCorrespond respectively to two small vectors in triple-frequency harmonics spaceSelected nearest two middle vectors in first harmonic spatialCorrespond respectively to the two of triple-frequency harmonics space Individual middle vectorTwo small vectors according to the triple-frequency harmonics spaceWith two middle vectorsSynthesis triple-frequency harmonics reference voltage vector： For Triple-frequency harmonics reference voltage vector, Respectively two action times of small vector of triple-frequency harmonics space,Point Wei not two action times of middle vector of triple-frequency harmonics space.
Further, in the random SVPWM method of Five-phase inverter non-sine, the specific method of step C is：Foundation Equation：
When solving the value of selected nearest two big vector action time and nearest two middle vectors effect in first harmonic spatial Between value, t3And t2The selected nearest two big vector action time respectively in first harmonic spatialWithValue, t1And t4Point Be not in first harmonic spatial selected nearest two middle vector action timeWithValue, UL、UM、USRespectively big vector, in The amplitude of vector, small vector, UL=0.6472UDC, UM=0.4UDC, US=0.2472UDC, UDCIt is DC bus-bar voltage,It is projection components of the fundamental wave reference voltage vector on the normal axis of first harmonic spatial two,For triple-frequency harmonics is joined Examine projection components of the voltage vector on the normal axis of triple-frequency harmonics space two.
Further, in the random SVPWM method of Five-phase inverter non-sine, the specific method of step D is：Holding is adopted Sample frequency is constant, and with switching frequency as random factor, random delay pwm pulse obtains switching frequency random value fsw：Again by mathematics that switching frequency and switch periods are reciprocal each other Relation obtains switch periods random value Tsw：Rand () is the function of random number in the range of generation [0,1], fsampFor Sample frequency, fswminIt is the switching frequency minimum value for setting, z-1It is complex variable.
Further, in the random SVPWM method of Five-phase inverter non-sine, the specific method of step E is：By table Up to formula：t0=Tsw-t1-t2-t3-t4Obtain zero vector action time sum t0, then by expression formula：Random point Action time t with each zero vectorz1And tz2。
The present invention uses above-mentioned technical proposal, has the advantages that：
1. non-sine SVPWM methods disclosed by the invention synthesize third-harmonic component during modulation, can be simultaneously Control Five-phase inverter output fundamental wave and triple-frequency harmonics, both respectively with driven object rotor on fundamental wave magnetic field and three times Harmonic field effect is produced can be with the torque of linear superposition, so as to improve torque and the power density of motor.
2. the present invention in Five-phase inverter non-sine SVPWM algorithms with switching frequency as random factor, by prolonging at random When pwm pulse realize the randomization of switch periods, zero vector action time is sweared according to switch periods random value and effective voltage Amount action time determine zero vector action time sum be randomly assigned what is obtained, realize zero vector action time it is dual with Machine, in the case where low-frequency range harmonic performance is not influenceed, greatly reduces the amplitude of higher hamonic wave, and script is concentrated on into switch Harmonic dispersion around frequency and its integral multiple improves the characteristic of harmonic energy integrated distribution in broader spectral range, Electromagnetic interference and high-frequency noise effectively are inhibited, the Electro Magnetic Compatibility of system is improve.
3. this kind of implementation method is directly controlled to harmonic source, being capable of effective suppression electromagnetic interference, it is not necessary to change electricity The topological structure on road, the hardware design also no extra demand to system, i.e., under conditions of system hardware cost is not increased just The random SVPWM of non-sine of polyphase inverter can be realized.
4. Stochastic Modulation method proposed by the present invention does not influence the performance of adjuster, is particularly well-suited to numerical control system.
Brief description of the drawings
Fig. 1 is the topological structure of five phase voltage source inventers.
Fig. 2 (a), Fig. 2 (b) are respectively Five-phase inverter space voltage vector in first harmonic spatial α1-β1, triple-frequency harmonics space α3-β3Distribution map.
Fig. 3 is two big middle Vector modulation fundamental wave references of vector two in one sector (I sectors) of first harmonic spatial The schematic diagram of voltage vector.
Fig. 4 is in triple-frequency harmonics space utilization and two big middle vectors corresponding two of vector two that first harmonic spatial is chosen Individual small vector and two schematic diagrams of middle Vector modulation triple-frequency harmonics reference voltage vector.
Fig. 5 is four sequences of operation of effective voltage vector in each sector of first harmonic spatial.
Fig. 6 be fundamental wave reference voltage vector in I sectors when, while export fundamental wave and triple-frequency harmonics and switch periods and The pulse schematic diagram of zero vector action time dual randomized modulation output.
Specific embodiment
The technical scheme invented is described in detail below in conjunction with the accompanying drawings.
The topological structure of five phase voltage source inverter bridges is as shown in Figure 1.DC bus-bar voltage is UDC, each bridge arm has upper and lower two Individual power switch pipe, it turns on and off and is controlled by PWM modulation signal.Define switch function S=[Sa,Sb,Sc,Sd,Se], with As a example by a phases, S when upper bridge arm switching tube is turned ona=1, S when lower bridge arm switching tube is turned ona=0, other are mutually as the same.On synchronization Lower bridge arm only one of which switching tube conducting, then space voltage vector can be expressed as：
In formula (1), k=0,1,2,3 ... 31, it is the decimal number being converted to by binary switch function.
According to the various combination of each phase bridge arm on off state of five phase voltage source inventers, can obtain including 30 non-null vectors Amount, 2 zero vector U0And U3132 fundamental space voltage vectors.This 30 non-zeros are segmented into three by amplitude size Group：Big vector UL, middle vector UM, small vector US, its amplitude is respectively：
The ratio between amplitude of three is 1.6182:1.618:1。
These space voltage vectors are in first harmonic spatial α1-β1With triple-frequency harmonics space alpha3-β3Distribution respectively as Fig. 2 (a), Shown in Fig. 2 (b).Two orthogonal subspaces are divided into ten sectors by 32 space voltage vectors.
The random SVPWM method of Five-phase inverter non-sine proposed by the present invention comprises the following steps：
When fundamental wave reference voltage vectorFall at a certain sector of first harmonic spatial, as shown in figure 3, being chosen in first harmonic spatial The two big vectors nearest from fundamental wave reference voltage vectorTwo middle vectorsTo synthesize fundamental wave reference Voltage vector, is represented by：
The two middle vectors of the two big vectors chosen in first harmonic spatial correspond to respectively two of triple-frequency harmonics space it is small VectorWithTwo middle vectorsWithIn triple-frequency harmonics space utilization in this corresponding two small vector and two Vector modulation triple-frequency harmonics reference voltage vectorAs shown in figure 4, then：
According to four basic voltage vectors two sub-spaces projection, can be basic to four by solving equation (7) The action time of voltage vector.
Wherein, n is voltage sector signals, TswIt is switch periods random value, vector in first harmonic spatialWith(correspondence Vector in triple-frequency harmonics spaceWith) value of action time is respectively t1And t4, the big vector of first harmonic spatialWithIt is (right Answer triple-frequency harmonics space small vectorWith) value of action time is respectively t3And t2。
In modulator approach proposed by the present invention, switch periods are not fixed values, are kept for the sampling period constant, each switch Cycle sampling period time delay Δ t corresponding compared to its, then switch periods be represented by：
Tsw=Tsamp+Δt-Δtz-1(8),
For the ease of realizing, using switching frequency fswUsed as stochastic variable, the maximum of switching frequency change is twice Sample frequency, the situation too small to avoid the occurrence of switching frequency sets a minimum value fswmin, then switching frequency is in [fswmin, 2fsamp] in the range of change at random, i.e.,：
Wherein, rand () is the function for generating random number in the range of [0,1].The inverse of switching frequency is taken, randomization is obtained Switch periods：
Per pulse all the way at center and Central Symmetry arrangement, on-off times are few, and switching loss is small, and this is equivalent to four Individual useful space voltage vector and two zero vectors are acted on successively, wherein, four useful space voltage vector effects in each sector Order is as shown in Figure 5.After obtaining switch periods through random delay method, two zero vector action times are calculated according to formula (11) Sum t0：
t0=Tsw-t1-t2-t3-t4 (11)。
By zero vector U0And U31Action time is randomly assigned, and its difference action time is obtained as follows：
Due to the randomization of switch periods, two zero vector action time sum t0Also change therewith, then by its random point Two zero vectors of dispensing, then zero vector U0And U31The time t of each self-applyingz1And tz2It is the result obtained by dual random.
According to the method described above, by switch periods and the randomization simultaneously of zero vector action time, the output pwm pulse for obtaining is such as Shown in Fig. 6.

Claims (6)

1. a kind of random SVPWM method of Five-phase inverter non-sine, it is characterised in that comprise the following steps：
A, determine the affiliated sector of fundamental wave reference voltage vector, chosen in first harmonic spatial from fundamental wave reference voltage vector it is nearest two The middle Vector modulation fundamental wave reference voltage vector of individual big vector two；
B, as in first harmonic spatial choose two big two middle vectors of vector in triple-frequency harmonics space corresponding to four voltages Vector modulation triple-frequency harmonics reference voltage vector；
C, according to two selected in first harmonic spatial big vectors, two middle vectors and realize non-sinusoidal power supply purpose determination Selected two action time and two action times of middle vector of big vector in first harmonic spatial；
D, in the case where keeping sample frequency constant, random delay pwm pulse is realizing the randomization of switch periods；
E, the action time of selected two big vectors and two middle vectors according to switch periods random value and in first harmonic spatial Action time obtain zero vector action time sum, be randomly assigned the effect that zero vector action time sum obtains each zero vector Time.
2. a kind of random SVPWM method of Five-phase inverter non-sine according to claim 1, it is characterised in that step A Specific method be：When fundamental wave reference voltage vector falls in a certain sector of first harmonic spatial, chosen from fundamental wave in first harmonic spatial Two nearest big middle Vector modulation fundamental wave reference voltage vectors of vector two of reference voltage vector： It is fundamental wave reference voltage vector,It is selected respectively in first harmonic spatial Nearest two big vectors,The action time of selected nearest two big vectors respectively in first harmonic spatial,Selected nearest two middle vectors respectively in first harmonic spatial,The institute respectively in first harmonic spatial Select the action time of nearest two middle vectors, TswIt is switch periods random value.
3. a kind of random SVPWM method of Five-phase inverter non-sine according to claim 2, it is characterised in that step B Specific method be：The selected nearest two big vectors in first harmonic spatialCorrespond respectively to triple-frequency harmonics space Two small vectorsSelected nearest two middle vectors in first harmonic spatialCorrespond respectively to three times it is humorous Two middle vectors in ripple spaceTwo small vectors according to the triple-frequency harmonics spaceIn two VectorSynthesis triple-frequency harmonics reference voltage vector： It is triple-frequency harmonics reference voltage vector,Respectively two action times of small vector of triple-frequency harmonics space,Respectively two action times of middle vector of triple-frequency harmonics space.
4. a kind of random SVPWM method of Five-phase inverter non-sine according to claim 3, it is characterised in that step C Specific method be：According to equation：
t 1 t 2 t 3 t 4 = U M cos ( ( n - 1 ) π 5 ) U L cos ( n π 5 ) U L cos ( ( n - 1 ) π 5 ) U M cos ( n π 5 ) U M sin ( ( n - 1 ) π 5 ) U L sin ( n π 5 ) U L sin ( ( n - 1 ) π 5 ) U M sin ( n π 5 ) U M cos ( 3 ( n - 1 ) π 5 ) - U S cos ( 3 n π 5 ) - U S cos ( 3 ( n - 1 ) π 5 ) U M cos ( 3 n π 5 ) U M sin ( 3 ( n - 1 ) π 5 ) - U S sin ( 3 n π 5 ) - U S sin ( 3 ( n - 1 ) π 5 ) U M sin ( 3 n π 5 ) - 1 U α 1 U β 1 U α 3 U β 3 * T s w
Solve the value of selected nearest two big vector action time and nearest two middle vector action time in first harmonic spatial Value, t3And t2The selected nearest two big vector action time respectively in first harmonic spatialWithValue, t1And t4Respectively The selected nearest two middle vector action time in first harmonic spatialWithValue, UL、UM、USRespectively big vector, middle arrow Amount, the amplitude of small vector, UL=0.6472UDC, UM=0.4UDC, US=0.2472UDC, UDCIt is DC bus-bar voltage, It is projection components of the fundamental wave reference voltage vector on the normal axis of first harmonic spatial two,For triple-frequency harmonics reference voltage is sweared Measure the projection components on the normal axis of triple-frequency harmonics space two.
5. a kind of random SVPWM method of Five-phase inverter non-sine according to claim 1 or 4, it is characterised in that step Suddenly the specific method of D is：Holding sample frequency is constant, and with switching frequency as random factor, random delay pwm pulse is switched Frequency accidental value fsw：Again by switching frequency and switch periods Mathematical relationship reciprocal obtains switch periods random value T each othersw：Rand () is random number in the range of generation [0,1] Function, fsampIt is sample frequency, fswminIt is the switching frequency minimum value for setting, z-1It is complex variable.
6. a kind of random SVPWM method of Five-phase inverter non-sine according to claim 5, it is characterised in that step E Specific method be：By expression formula：t0=Tsw-t1-t2-t3-t4Obtain zero vector action time sum t0, then by expression formula：It is randomly assigned the action time t of each zero vectorz1And tz2。
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CN110190798A (en) * 2018-02-21 2019-08-30 现代自动车株式会社 System and method for controlling the inverter of driving motor
CN110932628A (en) * 2019-12-14 2020-03-27 中国科学院深圳先进技术研究院 Pulse width modulation method and device for five-phase motor and terminal equipment
CN111355450A (en) * 2020-04-03 2020-06-30 青海省第三地质勘查院 Quasi-sinusoidal pseudo-random signal generating device and generating method thereof
CN113037167A (en) * 2021-05-20 2021-06-25 西南交通大学 Five-phase PMSM model prediction control method for improving voltage utilization rate
CN113271027A (en) * 2021-07-12 2021-08-17 希望森兰科技股份有限公司 Diode-clamped high-performance synchronous overmodulation algorithm for three-level inverter
CN113422555A (en) * 2021-05-19 2021-09-21 江苏大学 Double-phase permanent magnet synchronous motor PMSM sawtooth carrier double-random SVPWM control method
CN113517845A (en) * 2021-06-04 2021-10-19 北京自动化控制设备研究所 Control method for suppressing fifth harmonic current of six-phase motor and system using same
CN115940685A (en) * 2022-11-28 2023-04-07 国网江苏省电力有限公司电力科学研究院 Three-dimensional space vector pulse width modulation method and system of three-phase four-bridge arm inverter

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