CN117526792A - Common-mode voltage suppression method for permanent magnet synchronous motor - Google Patents

Common-mode voltage suppression method for permanent magnet synchronous motor Download PDF

Info

Publication number
CN117526792A
CN117526792A CN202410012915.8A CN202410012915A CN117526792A CN 117526792 A CN117526792 A CN 117526792A CN 202410012915 A CN202410012915 A CN 202410012915A CN 117526792 A CN117526792 A CN 117526792A
Authority
CN
China
Prior art keywords
ref
sector
common
mode voltage
permanent magnet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202410012915.8A
Other languages
Chinese (zh)
Inventor
刘艺涛
伍雄辉
郑道明
尹健
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen University
Original Assignee
Shenzhen University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenzhen University filed Critical Shenzhen University
Priority to CN202410012915.8A priority Critical patent/CN117526792A/en
Publication of CN117526792A publication Critical patent/CN117526792A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
    • H02P21/14—Estimation or adaptation of machine parameters, e.g. flux, current or voltage
    • 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
    • H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
    • H02P21/05—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation specially adapted for damping motor oscillations, e.g. for reducing hunting
    • 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
    • H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
    • H02P25/02—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the kind of motor
    • H02P25/022—Synchronous motors
    • 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
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P2207/00—Indexing scheme relating to controlling arrangements characterised by the type of motor
    • H02P2207/05—Synchronous machines, e.g. with permanent magnets or DC excitation

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Inverter Devices (AREA)

Abstract

The invention provides a common-mode voltage suppression method for a permanent magnet synchronous motor, which is characterized in that a bridge arm is added in parallel on the basis of a three-phase three-bridge arm inverter, a sector where a reference voltage vector is located is judged, a switching vector is selected, and the action sequence and the action time of the switching vector are confirmed, so that the switching states of four bridge arms are controlled. The invention selects six switch vectorsu 1 (1001)、u 2 (1100)、u 3 (0101)、u 4 (0110)、u 5 (0011) Andu 6 (1010) The switching state of each bridge arm is controlled, so that not only can zero vector be avoided, but also the common-mode voltage of the system can be reduced to the greatest extent, thereby improving the performance and service life of the motorAnd (5) a life.

Description

Common-mode voltage suppression method for permanent magnet synchronous motor
Technical Field
The invention relates to the technical field of inverter control, in particular to a common-mode voltage suppression method for a permanent magnet synchronous motor.
Background
With the rapid development of modern power electronics, performance requirements for Permanent Magnet Synchronous Motor (PMSM) drive systems are also increasing. Space Vector Pulse Width Modulation (SVPWM) technology is widely applied to PMSM driving systems because of the advantages of high DC utilization rate, easy digital implementation and the like. Meanwhile, due to the introduction of SVPWM, the PMSM drive system generates a common-mode voltage with very high output amplitude and frequency, and the common-mode voltage acts for a long time, so that not only can the motor winding be accelerated to deteriorate and damage a motor bearing, but also electromagnetic interference can be generated on other surrounding equipment, and even personal safety can be endangered. Therefore, research into common mode voltage rejection strategies is important.
The suppression of common mode voltage is currently mainly from two angles: hardware suppression and software suppression. Hardware suppression strategies are typically implemented by adding filters to the circuit or changing the topology, while software suppression strategies are typically implemented by improving the modulation algorithm of the system. The hardware inhibition strategy, such as a passive inhibition method, is adopted, and the main defects are that the weight and the volume of the added passive device are relatively large; the biggest defect of the active suppression method is that the universality is not strong, and the reliability is not guaranteed. In addition, although hardware equipment is not required to be added through a software modulation strategy, the common-mode voltage suppression effect is limited, and the common-mode voltage cannot be completely eliminated by simply adopting a three-phase two-level inverter in combination with the modulation strategy. It is therefore considered to adopt an improved topology and to suppress the common mode voltage from the source in combination with a suitable modulation strategy.
Disclosure of Invention
The invention provides a common-mode voltage suppression method for a permanent magnet synchronous motor, which is used for solving the problem of poor common-mode voltage suppression effect.
The invention provides a common-mode voltage suppression method of a permanent magnet synchronous motor, which comprises the following steps of:
s1, providing a three-phase four-leg inverter, wherein one leg is added in parallel on the basis of the three-phase three-leg inverter, so that the three-phase four-leg inverter comprises four legs;
s2, defining a voltage vector asu ref According to the u ref Projection positions on alpha and beta planes are determined, and the u is determined ref A sector in which the user is located;
s3, confirming a switching vector, wherein the switching vector comprises u 1 (1001)、u 2 (1100)、u 3 (0101)、u 4 (0110)、u 5 (0011) And u 6 (1010) Using the u 1 (1001) Said u 2 (1100) Said u 3 (0101) Said u 4 (0110) Said u 5 (0011) And said u 6 (1010)；
S4, according to the u ref Selecting the corresponding use of the u in the sector 1 (1001) Said u 2 (1100) Said u 3 (0101) Said u 4 (0110) Said u 5 (0011) And said u 6 (1010) Four of them;
s5, confirming the u 1 (1001) Said u 2 (1100) Said u 3 (0101) Said u 4 (0110) Said u 5 (0011) And said u 6 (1010) Four of them are operated in sequence, and the u is calculated 1 (1001) Said u 2 (1100) Said u 3 (0101) Said u 4 (0110) Said u 5 (0011) And said u 6 (1010) Four of which are duration;
s6, controlling the switching states of the four bridge arms according to the calculation result of the step S5;
and S7, repeating the steps S4 to S6.
Compared with the prior art, the invention adds one bridge arm on the basis of the three-phase three-bridge arm inverter, adopts the improved three-dimensional space vector modulation (3D) technology and the SVM technology to realize the control of the motor, and selects six switch vectors u 1 (1001)、u 2 (1100)、u 3 (0101)、u 4 (0110)、u 5 (0011) And u 6 (1010) The switching state of each bridge arm is controlled, so that zero vectors can be avoided, the common-mode voltage of the system can be reduced to the greatest extent, and the performance and the service life of the motor are improved.
Drawings
For a clearer description of the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the description below are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art, wherein:
FIG. 1 is a topology diagram of a three-phase four-leg inverter PMSM system;
FIG. 2 is a schematic diagram of zero common mode 3D, the SVM vector synthesis;
FIG. 3 is a voltage vector and time of action distribution diagram for sector I, the zero common mode 3D for sector VI, the SVM modulation technique;
FIG. 4 is a zero common mode 3D, common mode voltage waveform diagram of the system under the SVM modulation technique;
fig. 5 is a three-phase current waveform diagram of the system under the SVM modulation technique in zero common mode 3D.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1 and 2, a three-phase four-leg inverter is provided, a leg is added in parallel based on the three-phase three-leg inverter, and a reference voltage vector u is used ref Projection positions on alpha and beta planes are determined, and the u is determined ref The sector in which the sector is located, the specific sector division is shown in fig. 2.
To judge the u ref Located is a sector, introducing u ref1 、u ref2 U ref3 Three variables and are defined as follows:
（1）
wherein u is α Is u ref Component on the alpha axis, u β Is u ref A component on the beta axis.
Redefining 4 auxiliary variables A, B, C and N, and providing each variable and the u ref1 Said u ref2 The u is as follows ref3 Wherein:
if u ref1 >0, then a=1, otherwise a=0;
if u ref2 >0, then b=1, otherwise b=0;
if u ref3 >0, then c=1, otherwise b=0;
let n=4c+2b+a, the N value is calculated.
Providing the corresponding relation between the N and the sector to obtain the u ref The sector in which it is located is shown in table 1:
；
confirming the switching vector, using six switching vectors u 1 (1001)、u 2 (1100)、u 3 (0101)、u 4 (0110)、u 5 (0011) And u 6 (1010). Specifying said u ref After the sector is located, according to the u ref And selecting four corresponding switching vectors for use in the sector. The phase voltages and spatial voltage vector relationships for these 6 sets of switch states are given in table 2.
The corresponding relation between the sector and the switch vector is as follows:
when said u is ref When located in the I-th sector, select u 1 (1001)、u 2 (1100)、u 3 (0101) And u 6 (1010)；
When said u is ref When located in sector II, select u 1 (1001)、u 2 (1100)、u 3 (0101) And u 4 (0110)；
When said u is ref When located in sector III, select u 2 (1100)、u 3 (0101)、u 4 (0110) And u 5 (0011)；
When said u is ref When located in sector IV, select u 3 (0101)、u 4 (0110)、u 5 (0011) And u 6 (1010)；
When said u is ref When located in the V-th sector, select u 1 (0101)、u 4 (0110)、u 5 (0011) And u 6 (1010)；
When said u is ref When located in sector VI, select u 1 0101)、u 2 (0110)、u 5 (0011) And u 6 (1010)。
Taking the vector in the first sector as an example, as shown in fig. 4, the sector uses two standard voltage vectors 1001 and 1100 as effective vectors, and replaces the zero vector with a pair of standard vectors 0101 and 1010 adjacent to the projection in the αβ plane, thereby achieving suppression of the common mode voltage.
The zero common mode 3D and the six effective vectors used by the SVM are all that the two upper bridge arms are conducted and the two lower bridge arms are conducted, so that the zero common mode voltage can be realized theoretically.
Referring to fig. 3, the order of the four switching vectors is selected and confirmed, and the duration of each switching vector is calculated. FIG. 3 shows the voltage vector and the time of action distribution diagram of the SVM modulation technique in zero common mode 3D, wherein the effective vector and the time of action of the vector are along T s Is symmetrically distributed on the midline of the pair. It can be seen that after the zero common mode 3D is adopted and the SVM is adopted, the upper bridge arm of the two-phase bridge arm is conducted at any moment, and the lower bridge arm switch tubes of the other two bridge arms are conducted, so that the common mode voltage of the system can be reduced to zero under ideal conditions.
The zero common mode 3D, the SVM has different active times of the active vectors 0101 and 1010 in one switching period. When referring to the vector u ref In the case of sector I, in a switching period T s In, the u is 1 (1001) Said u 2 (1100) Said u 3 (0101) And said u 6 (1010) Order of actionIs u 6 Said u 1 Said u 2 Said u 3 Said u 2 Said u 1 Said u 6 The action time calculation formula is as follows:
（2）
wherein:
u 1α 、u 2α 、u 3α 、u 6α u is respectively 1 、u 2 、u 3 、u 6 An alpha-axis component;
u 1β 、u 2β 、u 3β 、u 6β u is respectively 1 、u 2 、u 3 、u 6 A component on the beta axis;
u 1γ 、u 2γ 、u 3γ 、u 6γ u is respectively 1 、u 2 、u 3 、u 6 A gamma component;
T 1 、T 2 、T 3 、T 6 u is respectively 1 、u 2 、u 3 、u 6 A time of action within one cycle;
u α 、u β the reference vectors are projected on the alpha and beta axes, respectively.
Substituting the data of table 2 into equation (2) yields:
（3）
and (3) solving to obtain:
（4）
when referring to the vector u ref In the case of sector II, in a switching cycle T s In, the u is 1 (1001) Said u 2 (1100) Said u 3 (0101) And said u 4 (0110) The action sequence is u 1 Said u 2 Said u 3 Said u 4 Said u 3 Said u 2 Said u 1 The action time calculation formula is as follows:
（5）
wherein:
u 1α 、u 2α 、u 3α 、u 4α u is respectively 1 、u 2 、u 3 、u 4 An alpha-axis component;
u 1β 、u 2β 、u 3β 、u 4β u is respectively 1 、u 2 、u 3 、u 4 A component on the beta axis;
u 1γ 、u 2γ 、u 3γ 、u 4γ u is respectively 1 、u 2 、u 3 、u 4 A gamma component;
T 1 、T 2 、T 3 、T 4 u is respectively 1 、u 2 、u 3 、u 4 A time of action within one cycle;
u α 、u β the reference vectors are projected on the alpha and beta axes, respectively.
Substituting the data of table 2 into equation (5) yields:
（6）
and (3) solving to obtain:
（7）
when referring to the vector u ref In the case of sector III, in a switching cycle T s In, the u is 2 (1100) Said u 3 (0101) Said u 4 (0110) And u 5 (0011) The action sequence is u 2 Said u 3 Said u 4 Said u 5 Said u 4 Said u 3 Said u 2 The action time calculation formula is as follows:
（8）
wherein:
u 2α 、u 3α 、u 4α 、u 5α u is respectively 2 、u 3 、u 4 、u 5 An alpha-axis component;
u 2β 、u 3β 、u 4β 、u 5β u is respectively 2 、u 3 、u 4 、u 5 A component on the beta axis;
u 2γ 、u 3γ 、u 4γ 、u 5γ u is respectively 2 、u 3 、u 4 、u 5 A gamma component;
T 2 、T 3 、T 4 、T 5 u is respectively 2 、u 3 、u 4 、u 5 A time of action within one cycle;
u α 、u β the reference vectors are projected on the alpha and beta axes, respectively.
Substituting the data of table 2 into equation (8) yields:
（9）
and (3) solving to obtain:
（10）
when referring to the vector u ref In the IV sector, in a switching period T s In, the u is 3 (0101) Said u 4 (0110) Said u 5 (0011) And said u 6 (1010) The action sequence is u 5 Said u 6 Said u 3 Said u 4 Said u 3 Said u 6 Said u 5 The action time calculation formula is as follows:
（11）
wherein:
u 3α 、u 4α 、u 5α 、u 6α u is respectively 3 、u 4 、u 5 、u 6 An alpha-axis component;
u 3β 、u 4β 、u 5β 、u 6β u is respectively 3 、u 4 、u 5 、u 6 A component on the beta axis;
u 3γ 、u 4γ 、u 5γ 、u 6γ u is respectively 3 、u 4 、u 5 、u 6 A gamma component;
T 3 、T 4 、T 5 、T 6 u is respectively 3 、u 4 、u 5 、u 6 A time of action within one cycle;
u α 、u β the reference vectors are projected on the alpha and beta axes, respectively.
Substituting the data of table 2 into formula (11) yields:
（12）
and (3) solving to obtain:
（13）
when referring to the vector u ref In the case of the V-th sector, in a switching period T s In, the u is 1 (1001) Said u 4 (0110) Said u 5 (0011) And said u 6 (1010) The action sequence is u 4 Said u 5 Said u 6 Said u 1 Said u 6 Said u 5 Said u 4 The action time calculation formula is as follows:
（14）
wherein:
u 1α 、u 4α 、u 5α 、u 6α u is respectively 1 、u 4 、u 5 、u 6 An alpha-axis component;
u 1β 、u 4β 、u 5β 、u 6β u is respectively 1 、u 4 、u 5 、u 6 A component on the beta axis;
u 1γ 、u 4γ 、u 5γ 、u 6γ u is respectively 1 、u 4 、u 5 、u 6 A gamma component;
T 1 、T 4 、T 5 、T 6 u is respectively 1 、u 4 、u 5 、u 6 A time of action within one cycle;
u α 、u β the reference vectors are projected on the alpha and beta axes, respectively.
Substituting the data of table 2 into equation (14) yields:
（15）
and (3) solving to obtain:
（16）
when referring to the vector u ref In the case of sector VI, in a switching cycle T s In, the u is 1 (1001) Said u 2 (1100) Said u 5 (0011) And said u 6 (1010) The action sequence is u 5 Said u 6 Said u 1 Said u 2 Said u 1 Said u 6 Said u 5 The action time calculation formula is as follows:
（17）
wherein:
u 1α 、u 2α 、u 5α 、u 6α u is respectively 1 、u 2 、u 5 、u 6 An alpha-axis component;
u 1β 、u 2β 、u 5β 、u 6β u is respectively 1 、u 2 、u 5 、u 6 A component on the beta axis;
u 1γ 、u 2γ 、u 5γ 、u 6γ u is respectively 1 、u 2 、u 5 、u 6 A gamma component;
T 1 、T 2 、T 5 、T 6 u is respectively 1 、u 2 、u 5 、u 6 A time of action within one cycle;
u α 、u β the reference vectors are projected on the alpha and beta axes, respectively.
Substituting the data of table 2 into equation (17) yields:
（18）
and (3) solving to obtain:
（19）
in addition, in the practical application process, the zero common mode 3D and the action time of each effective vector of the SVM are required to be ensured to be larger than zero, so that the range of the linear modulation degree m can be obtained:
（20）
wherein V is dc Is a direct-current side voltage, θ is the u ref And an angle with the alpha axis.
In order to verify the suppression condition of the common-mode voltage, an experimental platform is built. The platform includes a main circuit portion and a PMSM load. The main circuit comprises two IGBT inverters, a direct current power supply, a current sensor, a pair towing platform, an encoder and the like. The two inverters are respectively used for driving the main control motor and the load motor, the parameters of the two motors are the same, the two motors are connected through the coupler, and the specific parameters of the motors are shown in table 3. The current sensor is selected from LTS15 of LEM company and NP, and can measure the current within + -15A. The encoder adopts an incremental photoelectric encoder with the precision of 2500 lines, and can meet the actual control requirement. In the actual control process, the load motor is controlled in a constant torque mode, but the load motor is reversely dragged by the main control motor, and at the moment, the load motor is equivalent to a generator.
Referring to fig. 4 and 5, the common-mode voltage and three-phase current waveforms of the system using the zero common-mode 3D and the SVM modulation technique are shown. It can be seen that the system common mode voltage can be kept fluctuating in a lower amplitude range, with common mode voltage spikes occurring in some areas. The reason why the common mode voltage cannot be completely eliminated is that the switching actions of the switching tube cannot be completely synchronized and dead time is added. Likewise, it can be seen from the three-phase current that the output current quality of the system is not significantly degraded from conventional modulation algorithms. It can be concluded that the designed zero common mode 3D, SVM modulation technique can substantially completely eliminate common mode voltages.
Compared with the prior art, the invention adds one bridge arm on the basis of the three-phase three-bridge arm inverter, adopts the improved three-dimensional space vector modulation (3D) technology and the SVM technology to realize the control of the motor, and selects six switch vectors u 1 (1001)、u 2 (1100)、u 3 (0101)、u 4 (0110)、u 5 (0011) And u 6 (1010) The switching state of each bridge arm is controlled, so that zero vectors can be avoided, the common-mode voltage of the system can be reduced to the greatest extent, and the performance and the service life of the motor are improved.
While the invention has been described with respect to the above embodiments, it should be noted that modifications can be made by those skilled in the art without departing from the inventive concept, and these are all within the scope of the invention.

Claims (10)

1. The common-mode voltage suppression method for the permanent magnet synchronous motor is characterized by comprising the following steps of:
s1, providing a three-phase four-leg inverter, wherein one leg is added in parallel on the basis of the three-phase three-leg inverter, so that the three-phase four-leg inverter comprises four legs;
s2, defining a voltage vector as u ref According to the u ref Projection positions on alpha and beta planes are determined, and the u is determined ref A sector in which the user is located;
s3, confirming a switching vector, wherein the switching vector comprises u 1 (1001)、u 2 (1100)、u 3 (0101)、u 4 (0110)、u 5 (0011) And u 6 (1010) Using the u 1 (1001) Said u 2 (1100) Said u 3 (0101) Said u 4 (0110) Said u 5 (0011) And said u 6 (1010)；
S4, according to the u ref Selecting the corresponding use of the u in the sector 1 (1001) Said u 2 (1100) Said u 3 (0101) Said u 4 (0110) Said u 5 (0011) And said u 6 (1010) Four of them;
s5, confirming the u 1 (1001) Said u 2 (1100) Said u 3 (0101) Said u 4 (0110) Said u 5 (0011) And said u 6 (1010) Four of them are operated in sequence, and the u is calculated 1 (1001) Said u 2 (1100) Said u 3 (0101) Said u 4 (0110) Said u 5 (0011) And said u 6 (1010) Four of which are duration;
s6, controlling the switching states of the four bridge arms according to the calculation result of the step S5;
and S7, repeating the steps S4 to S6.
2. The method for suppressing a common-mode voltage of a permanent magnet synchronous motor according to claim 1, wherein the step S2 further comprises the steps of:
s21, introducing u ref1 、u ref2 U ref3 Three variables and are defined as follows:
；
wherein u is α Is u ref Component on the alpha axis, u β Is u ref A component on the beta axis;
s22, defining 4 auxiliary variables A, B, C and N, and providing each variable and the u ref1 Said u ref2 The u is as follows ref3 Wherein:
if u ref1 >0, then a=1, otherwise a=0;
if u ref2 >0, then b=1, otherwise b=0;
if u ref3 >0, then c=1, otherwise b=0;
let n=4c+2b+a, calculate the value of N;
s23, providing the corresponding relation between the N and the sector to obtain the u ref The sector in which the sector is located.
3. The method for suppressing a common-mode voltage of a permanent magnet synchronous motor according to claim 2, wherein the correspondence between the sector and the switching vector in S4 is as follows:
when said u is ref When located in the I-th sector, select u 1 (1001)、u 2 (1100)、u 3 (0101) And u 6 (1010)；
When said u is ref When located in sector II, select u 1 (1001)、u 2 (1100)、u 3 (0101) And u 4 (0110)；
When said u is ref When located in sector III, select u 2 (1100)、u 3 (0101)、u 4 (0110) And u 5 (0011)；
When said u is ref When located in sector IV, select u 3 (0101)、u 4 (0110)、u 5 (0011) And u 6 (1010)；
When said u is ref When located in the V-th sector, select u 1 (0101)、u 4 (0110)、u 5 (0011) And u 6 (1010)；
When said u is ref When located in sector VI, select u 1 (0101)、u 2 (0110)、u 5 (0011) And u 6 (1010)。
4. A method of suppressing a common-mode voltage of a permanent magnet synchronous motor according to claim 3, wherein when u is ref When in the I sector, the u is in a switching period 1 (1001) Said u 2 (1100) Said u 3 (0101) And said u 6 (1010) The action sequence is the u 6 (1010) Said u 1 (1001) Said u 2 (1100) Said u 3 (0101) Said u 2 (1100) Said u 1 (1001) Said u 6 (1010) The action time calculation formula is as follows:
；
wherein T is 1 、T 2 、T 3 、T 6 The u is respectively 1 Said u 2 Said u 3 Said u 6 The action time in one period, T s For the switching period, V dc Is a direct current side voltage.
5. A method of suppressing a common-mode voltage of a permanent magnet synchronous motor according to claim 3, wherein when u is ref When in the II th sector, the u is in a switching period 1 (1001) Said u 2 (1100) Said u 3 (0101) And said u 4 (0110) The action sequence is u 1 (1001) Said u 2 (1100) Said u 3 (0101) Said u 4 (0110) Said u 3 (0101) Said u 2 (1100) Said u 1 (1001) As a result ofThe calculation formula of the time is as follows:
；
wherein T is 1 、T 2 、T 3 、T 4 The u is respectively 1 Said u 2 Said u 3 Said u 4 The action time in one period, T s For the switching period, V dc Is a direct current side voltage.
6. A method of suppressing a common-mode voltage of a permanent magnet synchronous motor according to claim 3, wherein when u is ref When in sector III, the u is in a switching period 2 (1100) Said u 3 (0101) Said u 4 (0110) And u 5 (0011) The action sequence is u 2 (1100) Said u 3 (0101) Said u 4 (0110) Said u 5 (0011) Said u 4 (0110) Said u 3 (0101) Said u 2 (1100) The action time calculation formula is as follows:
；
wherein T is 2 、T 3 、T 4 、T 5 The u is respectively 2 Said u 3 Said u 4 Said u 5 The action time in one period, T s For the switching period, V dc Is a direct current side voltage.
7. A method of suppressing a common-mode voltage of a permanent magnet synchronous motor according to claim 3, wherein when u is ref When in the IV sector, the u is in a switching period 3 (0101) Said u 4 (0110) Said u 5 (0011) And said u 6 (1010) The action sequence is u 5 (0011) Said u 6 (1010) Said u 3 (0101) Said u 4 (0110) Said u 3 (0101) Said u 6 (1010) Said u 5 (0011) The action time calculation formula is as follows:
；
wherein T is 3 、T 4 、T 5 、T 6 The u is respectively 3 Said u 4 Said u 5 Said u 6 The action time in one period, T s For the switching period, V dc Is a direct current side voltage.
8. A method of suppressing a common-mode voltage of a permanent magnet synchronous motor according to claim 3, wherein when u is ref When in the V sector, the u is in a switching period 1 (1001) Said u 4 (0110) Said u 5 (0011) And said u 6 (1010) The action sequence is u 4 (0110) Said u 5 (0011) Said u 6 (1010) Said u 1 (1001) Said u 6 (1010) Said u 5 (0011) Said u 4 (0110) The action time calculation formula is as follows:
；
wherein T is 1 、T 4 、T 5 、T 6 The u is respectively 1 Said u 4 Said u 5 Said u 6 The action time in one period, T s For the switching period, V dc Is a direct current side voltage.
9. A method of suppressing a common-mode voltage of a permanent magnet synchronous motor according to claim 3, wherein when u is ref When in the VI th sector, the u is in a switching period 1 (1001) Said u 2 (1100) Said u 5 (0011) And said u 6 (1010) Order of actionIs u 5 (0011) Said u 6 (1010) Said u 1 (1001) Said u 2 (1100) Said u 1 (1001) Said u 6 (1010) Said u 5 (0011) The action time calculation formula is as follows:
；
wherein T is 1 、T 2 、T 5 、T 6 The u is respectively 1 Said u 2 Said u 5 Said u 6 The action time in one period, T s For the switching period, V dc Is a direct current side voltage.
10. The method for suppressing a common-mode voltage of a permanent magnet synchronous motor according to claim 1, wherein the linear modulation degree is in a range of m:；
wherein V is dc Is a direct-current side voltage, θ is the u ref And an angle with the alpha axis.
CN202410012915.8A 2024-01-04 2024-01-04 Common-mode voltage suppression method for permanent magnet synchronous motor Pending CN117526792A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202410012915.8A CN117526792A (en) 2024-01-04 2024-01-04 Common-mode voltage suppression method for permanent magnet synchronous motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202410012915.8A CN117526792A (en) 2024-01-04 2024-01-04 Common-mode voltage suppression method for permanent magnet synchronous motor

Publications (1)

Publication Number Publication Date
CN117526792A true CN117526792A (en) 2024-02-06

Family

ID=89751700

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202410012915.8A Pending CN117526792A (en) 2024-01-04 2024-01-04 Common-mode voltage suppression method for permanent magnet synchronous motor

Country Status (1)

Country Link
CN (1) CN117526792A (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110995115A (en) * 2019-12-23 2020-04-10 深圳市凌康技术有限公司 Improved three-dimensional space vector modulation method and system
CN111049411A (en) * 2019-11-20 2020-04-21 天津大学 Modulation method of three-phase four-leg current source type converter
CN111293871A (en) * 2020-03-29 2020-06-16 西南交通大学 Leakage current suppression method for three-phase four-bridge-arm Z-source inverter
CN115566872A (en) * 2022-06-14 2023-01-03 湘潭大学 Double-space vector modulation strategy capable of inhibiting common-mode voltage of three-phase four-bridge matrix converter
CN116317662A (en) * 2022-12-12 2023-06-23 合肥工业大学 Zero-vector-free predictive control method for four-bridge arm inverter of new energy automobile
CN117240061A (en) * 2023-09-13 2023-12-15 安徽工程大学 Three-dimensional vector modulation-based common-mode voltage suppression method for three-phase four-bridge arm inverter

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111049411A (en) * 2019-11-20 2020-04-21 天津大学 Modulation method of three-phase four-leg current source type converter
CN110995115A (en) * 2019-12-23 2020-04-10 深圳市凌康技术有限公司 Improved three-dimensional space vector modulation method and system
CN111293871A (en) * 2020-03-29 2020-06-16 西南交通大学 Leakage current suppression method for three-phase four-bridge-arm Z-source inverter
CN115566872A (en) * 2022-06-14 2023-01-03 湘潭大学 Double-space vector modulation strategy capable of inhibiting common-mode voltage of three-phase four-bridge matrix converter
CN116317662A (en) * 2022-12-12 2023-06-23 合肥工业大学 Zero-vector-free predictive control method for four-bridge arm inverter of new energy automobile
CN117240061A (en) * 2023-09-13 2023-12-15 安徽工程大学 Three-dimensional vector modulation-based common-mode voltage suppression method for three-phase four-bridge arm inverter

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
ZENG LIU ET AL: "Modeling, Analysis, and Mitigation of Load Neutral Point Voltage for Three-Phase Four-Leg Inverter", 《IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS》, vol. 60, no. 5, 31 May 2013 (2013-05-31), pages 2010 - 2021, XP011490833, DOI: 10.1109/TIE.2012.2207653 *
郑柳鹏 等: "三相四桥臂变流器调制方法综述", 《东莞理工学报》, vol. 29, no. 1, 28 February 2022 (2022-02-28), pages 24 - 32 *
陈红兵: "储能功率变换系统（PCS）四桥臂功率变换器及其控制策略", 《中国博士学位论文全文数据库 工程科技Ⅱ辑》, 15 April 2014 (2014-04-15) *

Similar Documents

Publication Publication Date Title
Duran et al. Predictive current control of dual three-phase drives using restrained search techniques
US8115431B2 (en) Inverter control apparatus and motor drive system
US7642737B2 (en) Anti-windup control for a current regulator of a pulse width modulation inverter
CN108418489B (en) Vector control method for winding open type permanent magnet synchronous motor for inhibiting zero sequence current
KR101423054B1 (en) Apparatus and method for controlling dual inverter system
JP5829053B2 (en) Grid-connected inverter device
Liu et al. Six-step mode control of IPMSM for railway vehicle traction eliminating the DC offset in input current
Kashkooli et al. Improved direct torque control of DFIG with reduced torque and flux ripples at constant switching frequency
Li et al. Zero-sequence current suppressing strategy for dual three-phase permanent magnet synchronous machines connected with single neutral point
JP4893151B2 (en) Space vector modulation method for AC-AC direct conversion device
CN112968614B (en) Wind power converter control method, power equipment control device and converter
Zhong et al. Reference voltage self-equalization-based modulation strategy for open-end winding PMSM fed by dual three-level inverters with common DC bus
CN111900900B (en) Multi-module motor, vibration and common-mode current suppression PWM (pulse-width modulation) method and system
CN117526792A (en) Common-mode voltage suppression method for permanent magnet synchronous motor
Jones et al. Dead-time effects in voltage source inverter fed multi-phase AC motor drives and their compensation
Vargas et al. Predictive strategy to reduce common-mode voltages on power converters
Renukadevi et al. Comparison of different PWM schemes for n-phase VSI
WO2020105133A1 (en) Electric power conversion device
Vaezi et al. A new space vector modulation technique for reducing switching losses in induction motor DTC-SVM scheme
US11296630B2 (en) Controller for rotary electric machine apparatus
Su et al. Stator flux trajectory control with optimized pulse patterns based on voltage command feed-forward
JP2010183702A (en) Controller of inverter
Ellabban et al. Field oriented control of an induction motor fed by a quasi-Z-source direct matrix converter
Roy et al. GH-reference frame based SVPWM controlled T-type NPC inverter fed PMSM drive for electric vehicle applications
CN117394744B (en) Common-mode voltage suppression method

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination