CN115622436B - Inverter circuit control method and device and inverter module - Google Patents

Abstract

The invention provides an inverter circuit control method, device and inverter module, and relates to the field of circuit control. Including: determining the non-zero voltage vector of the target space angle area; the target space angle area is the first space angle area or the second space angle area in the plurality of space angle areas, wherein the first space angle area The first number N1 of non-zero voltage vectors is greater than the second number N2 of non-zero voltage vectors in the second space angle area, and there is a preset number of said The second space angle area; determine the action time of the non-zero voltage vector in the target space angle area; determine the waveform control parameters according to the non-zero voltage vector in the target space angle area and the action time of the non-zero voltage vector; A control signal is generated according to the waveform control parameters to control the state of the inverter circuit, effectively reducing the common-mode voltage.

Description

Inverter circuit control method, device and inverter module

technical field

The invention relates to the technical field of circuit control, in particular to an inverter circuit control method, device and inverter module.

Background technique

The inverter is a converter that converts DC power into constant frequency and constant voltage or frequency modulation and voltage regulation AC power. PWM (PulseWidth Modulation, pulse width modulation) rectifier is a power converter developed by applying pulse width modulation technology. Inverter Inverters and PWM rectifiers have been widely used in various industries and fields, and have become crucial to the control of inverters. Usually, pulse width modulation signals can be used to control inverters or PWM rectifiers.

In related technologies, SVPWM (Space Vector Pulse Width Modulation, Space Vector Pulse Width Modulation) is based on the ideal flux circle of the stator of the three-phase symmetrical motor stator when the three-phase symmetrical sine wave voltage is supplied as the reference standard, and the different switching modes of the three-phase inverter are used as the reference standard. Properly switch to get pulse width modulation signal; adopt SVPWM to synthesize pulse width modulation signal according to zero vector and non-zero vector.

However, in the related art, the synthesized pulse width modulation signal controls the inverter, which is prone to the problem of high common-mode voltage.

Contents of the invention

The object of the present invention is to provide an inverter circuit control method, device and inverter module to solve the above-mentioned technical problems existing in the related art.

In order to achieve the above object, the technical solution adopted in the embodiment of the present invention is as follows:

In a first aspect, an embodiment of the present invention provides an inverter circuit control method, including:

Determine the non-zero voltage vector of the target space angle area from the non-zero voltage vectors of the multiple space angle areas; the target space angle area is the first space angle area or the second space angle area in the multiple space angle areas area, wherein the first number N1 of non-zero voltage vectors in the first space angle area is greater than the second number N2 of non-zero voltage vectors in the second space angle area, and every two of the first space There is a preset number of the second spatial corner areas separated by the corner area;

determining the action time of the non-zero voltage vector in the target spatial angle region;

Determining waveform control parameters according to the non-zero voltage vector in the target space angle region and the action time of the non-zero voltage vector;

A control signal is generated according to the waveform control parameters to control the state of the inverter circuit.

Optionally, the determining the non-zero voltage vector of the target space angle area from the non-zero voltage vectors of multiple space angle areas includes:

If the target space angle area is the first space angle area, determining N1 non-zero voltage vectors centered on the first space angle area from the non-zero voltage vectors in the plurality of space angle areas, is a non-zero voltage vector in the first space angle region;

If the target space angle area is the second space angle area, determine N2-1 non-zero voltages centered on the second space angle area from the non-zero voltage vectors of the plurality of space angle areas The vector, and a remaining non-zero voltage vector obtained by deflecting any non-zero voltage vector of the multiple non-zero voltage vectors by 180 degrees, are the non-zero voltage vectors in the second spatial angle region.

Optionally, the N1 non-zero voltage vectors centered on the first space angle region include: two non-zero voltage vectors forming the first space angle region, and the two non-zero voltage vectors Other non-zero voltage vectors adjacent to the voltage vector;

The N2-1 non-zero voltage vectors centered on the second space angle area include: two non-zero voltage vectors forming the second space angle area.

Optionally, the angle ranges of the first space angle area are: 0-60 degrees and 180-240 degrees, and the angle ranges of the second space angle area are: 60-120 degrees, 120-180 degrees, 240- 300 degrees and 300-360 degrees; or;

The angle ranges of the first space angle area are: 120-180 degrees and 300-360 degrees, and the angle ranges of the second space angle area are: 0-60 degrees, 60-120 degrees, 180-240 degrees and 240 degrees -300 degrees; or;

The angle ranges of the first space angle area are: 60-120 degrees and 240-300 degrees, and the angle ranges of the second space angle area are: 0-60 degrees, 120-180 degrees, 180-240 degrees and 300 degrees -360 degrees.

Optionally, if the target space angle area is the first space angle area, determining the action time of the non-zero voltage vector in the target space angle area includes:

Determining the action times of two non-zero voltage vectors adjacent to the first space angle area among the non-zero voltage vectors in the first space angle area are T1 and T2 respectively;

In determining the non-zero voltage vectors in the first spatial angle region, the action time of other non-zero voltage vectors is half of T0, wherein T0=1-T1-T2.

Optionally, if the target space angle area is the second space angle area, determining the action time of the non-zero voltage vector in the target space angle area includes:

Determining that among the non-zero voltage vectors in the second spatial angle region, the action times of two adjacent non-zero voltage vectors in the second spatial angle region are T1 and T2;

Determining that among the non-zero voltage vectors in the second spatial angle region, the action time of other non-zero voltage vectors is one-half of T0;

Adjusting the action time of the non-zero voltage vector that is 180 degrees different from the other non-zero voltage vector among the two non-zero voltage vectors is T1 plus one-half of the T0, or T2 plus the time of the T0 Half.

In the second aspect, the embodiment of the present invention also provides an inverter circuit control method, including:

Determine the non-zero voltage vector of the target space angle area from the non-zero voltage vectors of multiple space angle areas; the target space angle area is the first space angle area or the second space angle area in the multiple space angle areas Space angle area, wherein, the first number N1 of non-zero voltage vectors in the first space angle area is greater than the second number N2 of non-zero voltage vectors in the second space angle area, and every two of the A preset number of second space angle areas are separated in the middle of a space angle area;

determining the action time of the non-zero voltage vector in the target spatial angle region;

determining a control signal according to the non-zero voltage vector in the target space angle region and the action time of the non-zero voltage vector, so as to control the state of the inverter circuit;

Wherein, the control signal is determined by comparing the three-phase triangular carrier wave with the three-phase modulation wave, one of the three-phase triangular carrier waves has a phase difference with the other two-phase triangular carrier waves by a preset angle, so The preset angle is determined according to the non-zero voltage vector in the target spatial angle region and the action time of the non-zero voltage vector.

Optionally, the preset angle is 180 degrees, and the three-phase modulation wave includes three-phase sine waves with a phase difference of 120 degrees.

In the third aspect, the embodiment of the present invention also provides an inverter circuit control device, including:

A determination module, configured to determine the non-zero voltage vector of the target space angle area from the non-zero voltage vectors of multiple space angle areas; the target space angle area is the first space in the multiple space angle areas A corner area or a second space angle area, wherein the first number N1 of non-zero voltage vectors in the first space angle area is greater than the second number N2 of non-zero voltage vectors in the second space angle area, and, every There is a preset number of second space angle areas between the two first space angle areas; determine the action time of the non-zero voltage vector of the target space angle area; according to the non-zero voltage vector of the target space angle area The voltage vector and the action time of the non-zero voltage vector determine the waveform control parameters;

The generation module is used to generate a control signal according to the waveform control parameters to control the state of the inverter circuit.

Optionally, the determining module is specifically configured to, if the target spatial angle area is the first spatial angle area, determine the voltage vector in the first space from the non-zero voltage vectors of the plurality of spatial angle areas. The N1 non-zero voltage vectors centered on the corner area are the non-zero voltage vectors of the first space angle area; if the target space angle area is the second space angle area, from the multiple space angle areas Among the non-zero voltage vectors, determine N2-1 non-zero voltage vectors centered on the second spatial angle region, and obtain the result obtained by deflecting any non-zero voltage vector of the plurality of non-zero voltage vectors by 180 degrees A remaining non-zero voltage vector is a non-zero voltage vector in the second spatial angle region.

Optionally, the N1 non-zero voltage vectors centered on the first space angle region include: two non-zero voltage vectors forming the first space angle region, and the two non-zero voltage vectors Other non-zero voltage vectors adjacent to the voltage vector;

The N2-1 non-zero voltage vectors centered on the second space angle area include: two non-zero voltage vectors forming the second space angle area.

Optionally, the angle ranges of the first space angle area are: 0-60 degrees and 180-240 degrees, and the angle ranges of the second space angle area are: 60-120 degrees, 120-180 degrees, 240- 300 degrees and 300-360 degrees; or;

The angle ranges of the first space angle area are: 120-180 degrees and 300-360 degrees, and the angle ranges of the second space angle area are: 0-60 degrees, 60-120 degrees, 180-240 degrees and 240 degrees -300 degrees; or;

The angle ranges of the first space angle area are: 60-120 degrees and 240-300 degrees, and the angle ranges of the second space angle area are: 0-60 degrees, 120-180 degrees, 180-240 degrees and 300 degrees -360 degrees.

Optionally, if the target space angle area is the first space angle area, the determining module is specifically configured to determine, among the non-zero voltage vectors of the first space angle area, the first space angle area The action times of two adjacent non-zero voltage vectors are T1 and T2 respectively; among the non-zero voltage vectors in the first spatial angle area, the action times of other non-zero voltage vectors are 1/2 of T0, where , T0=1-T1-T2.

Optionally, if the target space angle area is the second space angle area, the determining module is specifically configured to determine, in the non-zero voltage vector of the second space angle area, the second space angle area The action time of two adjacent non-zero voltage vectors is T1 and T2; among the non-zero voltage vectors in the second spatial angle area, the action time of other non-zero voltage vectors is 1/2 of T0; Among the above two non-zero voltage vectors, the action time of the non-zero voltage vector that is 180 degrees different from the other non-zero voltage vectors is T1 plus one-half of T0, or T2 plus half of T0 one.

In a fourth aspect, the embodiment of the present invention also provides an inverter module, including: an inverter circuit and a controller, the inverter circuit is connected to the controller;

The controller includes: a memory and a processor, the memory stores a computer program executable by the processor, and the processor implements any one of the first aspect and the second aspect when executing the computer program. In the inverter circuit control method, the control signal is output to the inverter circuit to control the switch state in the inverter circuit.

The beneficial effects of the present invention are: the embodiment of the present application provides an inverter circuit control method, including: determining the non-zero voltage vector of the target space angle area from the non-zero voltage vectors of multiple space angle areas; The corner area is a first space angle area or a second space angle area among the plurality of space angle areas, wherein the first number N1 of non-zero voltage vectors in the first space angle area is greater than the second space angle The second number N2 of the non-zero voltage vectors of the area, and there is a preset number of the second space angle areas between each two of the first space angle areas; determine the non-zero voltage of the target space angle area The action time of the vector; according to the non-zero voltage vector in the target space angle area and the action time of the non-zero voltage vector, determine the waveform control parameter; generate a control signal according to the waveform control parameter to control the inverter circuit state. When the control signal is generated, the non-zero voltage vector of the target space angle area is used, and the target space angle area can be the first space angle area or the second space angle area in a plurality of space angle areas, the first space angle area The number of non-zero voltage vectors is greater than the number of non-zero voltage vectors in the second spatial angle region, which can effectively reduce the common-mode voltage.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and thus It should be regarded as a limitation on the scope, and those skilled in the art can also obtain other related drawings based on these drawings without creative work.

FIG. 1 is a schematic flow diagram 1 of an inverter circuit control method provided in an embodiment of the present application;

FIG. 2 is a first schematic diagram of a plurality of spatial angle regions provided by the embodiment of the present application;

Fig. 3 is a second schematic diagram of a plurality of spatial angle regions provided by the embodiment of the present application;

Fig. 4 is a schematic diagram 3 of a plurality of spatial angle regions provided by the embodiment of the present application;

Fig. 5 is a schematic diagram 4 of a plurality of spatial angle regions provided by the embodiment of the present application;

FIG. 6 is a schematic flow diagram II of an inverter circuit control method provided in an embodiment of the present application;

FIG. 7 is a schematic flow diagram III of an inverter circuit control method provided in an embodiment of the present application;

FIG. 8 is a schematic flow diagram IV of an inverter circuit control method provided in an embodiment of the present application;

FIG. 9 is a schematic diagram of a wave transmission mode of the first sector provided by an embodiment of the present application;

FIG. 10 is a schematic diagram of a three-phase triangular carrier wave corresponding to Scheme 1 provided in the embodiment of the present application;

FIG. 11 is a schematic diagram of a three-phase triangular carrier wave corresponding to Scheme 2 provided by the embodiment of the present application;

FIG. 12 is a schematic diagram of a three-phase triangular carrier wave corresponding to Scheme 3 provided by the embodiment of the present application;

FIG. 13 is a schematic structural diagram of an inverter circuit provided in an embodiment of the present application;

FIG. 14 is a schematic structural diagram of an inverter circuit control device provided in an embodiment of the present application;

Fig. 15 is a schematic structural diagram of an inverter module provided by an embodiment of the present application.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments.

Accordingly, the following detailed description of the embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

In the description of this application, it should be noted that if the orientation or positional relationship indicated by the terms "upper", "lower", etc. appear, it is based on the orientation or positional relationship shown in the drawings, or is the usual practice when using the product of this application. The orientation or positional relationship of placement is only for the convenience of describing the application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be interpreted as a reference to this application. limits.

In addition, the terms "first", "second" and the like in the description and claims of the present invention and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodiments of the invention described herein can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having", as well as any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or device comprising a sequence of steps or elements is not necessarily limited to the expressly listed instead, may include other steps or elements not explicitly listed or inherent to the process, method, product or apparatus.

It should be noted that, in the case of no conflict, the features in the embodiments of the present application may be combined with each other.

In the related technology, SVPWM is based on the ideal flux circle of the stator of the three-phase symmetrical motor when the three-phase symmetrical sine wave voltage is supplied as the reference standard, and the different switching modes of the three-phase inverter are used for appropriate switching to obtain pulse width modulation signals; SVPWM is adopted (Space Vector Pulse Width Modulation, Space Vector Pulse Width Modulation), synthesizes a pulse width modulation signal based on a zero vector and a non-zero vector. However, in the related art, the synthesized pulse width modulation signal controls the inverter, which is prone to the problem of high common-mode voltage.

In view of the above-mentioned technical problems in the related art, the embodiment of the present application provides an inverter circuit control method, which uses a non-zero voltage vector in the target space angle area when generating the control signal, and the target space angle area can be In the first space angle area or the second space angle area among the multiple space angle areas, the number of non-zero voltage vectors in the first space angle area is greater than the number of non-zero voltage vectors in the second space angle area, which can effectively reduce the common mode voltage.

A method for controlling an inverter circuit provided in an embodiment of the present application is explained below.

Fig. 1 is a schematic flow diagram 1 of an inverter circuit control method provided in an embodiment of the present application. As shown in Fig. 1, the method may include:

S101. Determine a non-zero voltage vector in a target spatial angle region from non-zero voltage vectors in multiple spatial angle regions.

Wherein, the target space angle area is the first space angle area or the second space angle area in the multiple space angle areas, and the first number N1 of the non-zero voltage vector in the first space angle area is greater than the non-zero voltage vector in the second space angle area. The second number N2 of voltage vectors, and a preset number of second space angle areas are separated between every two first space angle areas.

In some embodiments, according to actual needs, at least one space angle area among the plurality of space angle areas may be used as a target space angle area, and the number of target space angle areas may be at least one. If there are multiple target spatial angle regions, a corresponding non-zero voltage vector needs to be determined for each target spatial angle region.

In the embodiment of the present application, if the target spatial angle area is the first spatial angle area, then the number of non-zero voltage vectors in the target spatial angle area is the first number N1; if the target spatial angle area is the second spatial angle area, then The number of non-zero voltage vectors of the target space angle region is the second number N2.

It should be noted that the multiple spatial angle areas may include multiple first spatial angle areas and multiple second spatial angle areas, wherein the number of the first spatial angle areas may be smaller than the number of the second spatial angle areas.

S102. Determine the action time of the non-zero voltage vector in the target spatial angle region.

Wherein, the number of non-zero voltage vectors in the target spatial angle region may be multiple.

It is worth noting that the action time of each non-zero voltage vector in the target space angle area can be determined sequentially, or the action time of each non-zero voltage vector in the target space angle area can be determined at the same time, and this embodiment of the present application does not Specific restrictions.

S103. Determine waveform control parameters according to the non-zero voltage vector in the target space angle region and the action time of the non-zero voltage vector.

S104. Generate a control signal according to the waveform control parameter to control the state of the inverter circuit.

In some embodiments, the preset application program can be used to determine the waveform control parameters according to the non-zero voltage vector in the target space angle area and the action time of the non-zero voltage vector; and generate a control signal according to the waveform control parameters to send to the inverter circuit The control signal is output; the inverter circuit can control the state of the inverter circuit according to the control signal.

Optionally, the control signal can also be output to the PWM rectification circuit, and the PWM rectification circuit can control the state of the PWM rectification circuit according to the control signal.

Optionally, the preset application program may be a DSP (Digital Signal Processing, digital signal processing) application program. Of course, other types of application programs may also be used, which is not specifically limited in this embodiment of the present application.

To sum up, the embodiment of the present application provides an inverter circuit control method, including: determining a non-zero voltage vector in a target space angle area from non-zero voltage vectors in a plurality of space angle areas; the target space angle area is the first space angle area or the second space angle area among the plurality of space angle areas, wherein the first number N1 of non-zero voltage vectors in the first space angle area is greater than that of the second space angle area The second number N2 of non-zero voltage vectors, and there is a preset number of second space angle areas between each two of the first space angle areas; determine the number of non-zero voltage vectors in the target space angle area Action time; determine waveform control parameters according to the non-zero voltage vector in the target space angle region and the action time of the non-zero voltage vector; generate a control signal according to the waveform control parameters to control the state of the inverter circuit. When the control signal is generated, the non-zero voltage vector of the target space angle area is used, and the target space angle area can be the first space angle area or the second space angle area in a plurality of space angle areas, the first space angle area The number of non-zero voltage vectors is greater than the number of non-zero voltage vectors in the second spatial angle region, which can effectively reduce the common-mode voltage.

The process of determining the non-zero voltage vector of the target space angle area from the non-zero voltage vectors of multiple space angle areas in the above S101 may include:

If the target space angle area is the first space angle area, from the non-zero voltage vectors of a plurality of space angle areas, determine N1 non-zero voltage vectors centered on the first space angle area, which are the non-zero voltage vectors of the first space angle area. zero voltage vector;

If the target space angle area is the second space angle area, from the non-zero voltage vectors of multiple space angle areas, determine N2-1 non-zero voltage vectors centered on the second space angle area, and for multiple non-zero voltage vectors One remaining non-zero voltage vector obtained by deflecting any non-zero voltage vector in the voltage vector by 180 degrees is the non-zero voltage vector in the second spatial angle region.

It should be noted that any non-zero voltage vector in the non-zero voltage vector can be deflected counterclockwise by 180 degrees to obtain a remaining non-zero voltage vector in the second space angle region, or any non-zero voltage vector in the non-zero voltage vector The vector is deflected clockwise by 180 degrees to obtain a remaining non-zero voltage vector in the second spatial angle region, which is not specifically limited in this embodiment of the present application.

Fig. 2 is a schematic diagram 1 of a plurality of space corner regions provided by the embodiment of the present application. As shown in Fig. 2, the plurality of space corner regions can form a circle, and the number of space corner regions can be 6, each space The corner region can also be called a sector, and each space corner region can be formed by constructing two voltage vectors.

In the embodiment of the present application, the non-zero voltage vector centered on the space angle area may refer to the non-zero voltage vectors distributed on both sides of the space angle area, and the non-zero voltage vectors are symmetrically distributed along the space angle area. As shown in FIG. 2 , for the space angle area I, for example, the non-zero voltage vectors corresponding to the space angle area I may be U4, U6; or U2, U5; or, U4, U6, U2, U5.

Optionally, the N1 non-zero voltage vectors centered on the first space angle area include: two non-zero voltage vectors forming the first space angle area, and other non-zero voltage vectors adjacent to the two non-zero voltage vectors Vectors: N2-1 non-zero voltage vectors centered on the second space angle area, including: two non-zero voltage vectors forming the second space angle area.

Wherein, the non-zero voltage vectors in the second space angle region include: two non-zero voltage vectors constituting the first space angle region, and one obtained by deflecting any non-zero voltage vector of the two non-zero voltage vectors by 180 degrees The remaining non-zero voltage vectors.

In some embodiments, N1=4, that is, the number of non-zero voltage vectors corresponding to the first space angle region can be 4; N2-1=2, N2=3, that is, the number of non-zero voltage vectors corresponding to the second space angle region The number of vectors can be 3.

For example, as shown in FIG. 2 , if the space angle area I is the first space angle area, the non-zero voltage vectors corresponding to the space angle area I may be four non-zero voltage vectors U4, U6, U2, and U5. If the space angle area II is the second space angle area, the non-zero voltage vectors corresponding to the space angle area II may be three non-zero voltage vectors U6, U2, and U5.

It should be noted that, as shown in Figure 2, the space angle area I can be called the first sector, the space angle area II can be called the second sector, the space angle area III can be called the third sector, the space angle area IV may be called the fourth sector, the space angle area V may be called the fifth sector, and the space angle area VI may be called the sixth sector.

In the embodiment of the present application, the non-zero voltage vectors corresponding to each space angle region have a certain sequence order, which can be arranged in a clockwise direction or in a counterclockwise direction.

Optionally, the angle ranges of the first space angle area are: 0-60 degrees and 180-240 degrees, and the angle ranges of the second space angle area are: 60-120 degrees, 120-180 degrees, 240-300 degrees and 300 degrees -360 degrees; or;

The angle ranges of the first space angle area are: 120-180 degrees and 300-360 degrees, and the angle ranges of the second space angle area are: 0-60 degrees, 60-120 degrees, 180-240 degrees and 240-300 degrees; or;

The angle ranges of the first space angle area are: 60-120 degrees and 240-300 degrees, and the angle ranges of the second space angle area are: 0-60 degrees, 120-180 degrees, 180-240 degrees and 300-360 degrees.

In some implementations, the angle ranges of the first space angle area are: 0-60 degrees and 180-240 degrees, which means that the first space angle area may include: the first sector (space angle area I) and the fourth sector area (space angle area IV); the angle ranges of the second space angle area are: 60-120 degrees, 120-180 degrees, 240-300 degrees and 300-360 degrees, which means that the first space angle area can include: the second Sector (space angle area II), third sector (space angle area III), fifth sector (space angle area V), sixth sector (space angle area VI).

Fig. 3 is a second schematic diagram of multiple space angle regions provided by the embodiment of the present application. As shown in (a) of Fig. 3, the multiple non-zero voltage vectors corresponding to the first sector may include: U2, U6, U4 , U5 (clockwise); as shown in (b) of Figure 3, the multiple non-zero voltage vectors corresponding to the second sector may include: U2, U6, U5 (clockwise); as shown in (c) of Figure 3 As shown, the multiple non-zero voltage vectors corresponding to the third sector can include: U2, U3, U5 (counterclockwise); as shown in (d) of Figure 3, the multiple non-zero voltage vectors corresponding to the fourth sector can be Including: U2, U3, U1, U5 (counterclockwise); as shown in (e) of Figure 3, multiple non-zero voltage vectors corresponding to the fifth sector may include: U2, U1, U5 (counterclockwise); As shown in (f) of FIG. 3 , the multiple non-zero voltage vectors corresponding to the sixth sector may include: U2, U4, and U5 (clockwise).

In other embodiments, the angle ranges of the first space angle area are: 120-180 degrees and 300-360 degrees, which means that the first space angle area may include: the third sector (space angle area III) and the sixth sector Sector (Spatial Angle Region VI). The angle ranges of the second space angle area are: 0-60 degrees, 60-120 degrees, 180-240 degrees and 240-300 degrees, which means that the second space angle area can include: the first sector (space angle area I) , the second sector (space angle area II), the fourth sector (space angle area IV), and the fifth sector (space angle area V).

Fig. 4 is a schematic diagram three of multiple spatial angle regions provided by the embodiment of the present application. As shown in (a) of Fig. 4, the multiple non-zero voltage vectors corresponding to the first sector may include: U1, U4, U6 ; As shown in Figure 4 (b), the multiple non-zero voltage vectors corresponding to the second sector may include: U1, U2, U6; as shown in Figure 4 (c), the multiple corresponding to the third sector The non-zero voltage vectors may include: U1, U3, U2, U6; as shown in (d) of Figure 4, the multiple non-zero voltage vectors corresponding to the fourth sector may include: U1, U3, U6; as shown in Figure 4 As shown in (e), the multiple non-zero voltage vectors corresponding to the fifth sector can include: U1, U5, U6; as shown in (f) of Figure 4, the multiple non-zero voltage vectors corresponding to the sixth sector can be Including: U1, U5, U4, U6.

In some other implementations, the angle ranges of the first space angle area are: 60-120 degrees and 240-300 degrees, which means that the first space angle area may include: the second sector (space angle area II) and the fifth sector sector (space angle area V); the angle ranges of the second space angle area are: 0-60 degrees, 120-180 degrees, 180-240 degrees and 300-360 degrees, which means that the second space angle area can include: One sector (spatial angle area I), the third sector (spatial angle area III), the fourth sector (spatial angle area IV) and the sixth sector (spatial angle area VI).

Fig. 5 is a schematic diagram 4 of a plurality of spatial angle regions provided by the embodiment of the present application. As shown in (a) of Fig. 5, the plurality of non-zero voltage vectors corresponding to the first sector may include: U4, U6, U3 ; As shown in Figure 5(b), the multiple non-zero voltage vectors corresponding to the second sector may include: U4, U6, U2, U3; as shown in Figure 5(c), the third sector corresponds to A plurality of non-zero voltage vectors may include: U4, U2, U3; as shown in (d) of Figure 5, a plurality of non-zero voltage vectors corresponding to the fourth sector may include: U4, U1, U3; as shown in Figure 5 As shown in (e), the multiple non-zero voltage vectors corresponding to the fifth sector may include: U4, U5, U1, U3; as shown in (f) of Figure 5, the multiple non-zero voltage vectors corresponding to the sixth sector Vectors can include: U4, U5, U3.

Fig. 6 is a schematic flow diagram II of an inverter circuit control method provided by the embodiment of the present application. As shown in Fig. 6, if the target space angle area is the first space angle area, the non-zero value of the target space angle area determined in S102 above is The course of action time of the voltage vector can include:

S601. Among the non-zero voltage vectors in the first space angle area, the action times of two adjacent non-zero voltage vectors in the first space angle area are T1 and T2 respectively.

S602. Among the non-zero voltage vectors in the first spatial angle region, the action time of other non-zero voltage vectors is half of T0.

Among them, T0=1-T1-T2.

In some implementations, the number of non-zero voltage vectors corresponding to the first space angle area can be four, the action times of the two adjacent non-zero voltage vectors in the first space angle area are T1 and T2 respectively, and the other two The action time of the non-zero voltage vector is one-half of T0, namely T0/2.

Optionally, FIG. 7 is a schematic flowchart of an inverter circuit control method provided in the embodiment of the present application. As shown in FIG. The course of action time of the region's non-zero voltage vector can include:

S701. Among the non-zero voltage vectors in the second space angle area, the action times of two adjacent non-zero voltage vectors in the second space angle area are T1 and T2.

S702. Among the non-zero voltage vectors in the second spatial angle region, the action time of other non-zero voltage vectors is half of T0.

S703. Adjust the action time of the non-zero voltage vector that is 180 degrees different from the other non-zero voltage vector among the two non-zero voltage vectors to be T1 plus one-half of T0, or T2 plus one-half of T0.

In some implementations, the number of non-zero voltage vectors corresponding to the second space angle region can be three, and the action time of the two non-zero voltage vectors constituting the second space angle region is T1 and T2, and the other non-zero voltage vectors It can be the remaining one voltage vector, the action time of the remaining voltage vector is T0/2, and the action time of the non-zero voltage vector which is 180 degrees different from the remaining voltage vector is T1+T0/2, or T2+T0/2.

For example, the angle ranges of the first space angle area are: 60-120 degrees and 240-300 degrees, and the angle ranges of the second space angle area are: 0-60 degrees, 120-180 degrees, 180-240 degrees and 300- 360 degrees. The multiple non-zero voltage vectors corresponding to the fifth sector can include: U4, U5, U1, U3, the action time of U1 can be T1, the action time of U5 can be T2, and the action time of U3 instead of U0 can be T0/2 , the action time of U4 instead of U7 can be T0/2. The multiple non-zero voltage vectors corresponding to the fourth sector can include: U4, U1, U3, the action time of U1 can be T1, the action time of U3 can be T2, and the action time of U4 can be T0/2, which is opposite to U4 The action time of U3 at 180 degrees can be T2+T0/2.

Fig. 8 is a schematic flow diagram IV of an inverter circuit control method provided in an embodiment of the present application. As shown in Fig. 8, the method may include:

S801. Determine a non-zero voltage vector in a target space angle area from non-zero voltage vectors in multiple space angle areas.

Wherein, the target space angle area is the first space angle area or the second space angle area in the multiple space angle areas, and the first number N1 of the non-zero voltage vector in the first space angle area is greater than the non-zero voltage vector in the second space angle area. The second number N2 of voltage vectors, and a preset number of second space angle areas are separated between every two first space angle areas.

S802. Determine the action time of the non-zero voltage vector in the target spatial angle region.

It should be noted that the process from S801 to S802 is similar to the process from S101 to S102 above, and will not be repeated here.

S803. Determine the control signal according to the non-zero voltage vector in the target space angle area and the action time of the non-zero voltage vector, so as to control the state of the inverter circuit;

Among them, the control signal is determined by comparing the three-phase triangular carrier wave with the three-phase modulation wave. Among the three-phase triangular carrier waves, the phase difference between one phase triangular carrier wave and the other two-phase triangular carrier waves is a preset angle. The preset angle is based on The non-zero voltage vector in the target space angle area and the action time of the non-zero voltage vector are determined.

In some embodiments, according to the non-zero voltage vector in the target space angle area and the action time of the non-zero voltage vector, it can be determined whether each phase of the three-phase triangular carrier wave is shifted by a preset degree, and the equivalent duty cycle can be calculated , according to the comparison between the three-phase triangular carrier wave and the three-phase modulation wave, the control signal can be determined.

It should be noted that an analog circuit can be used to simulate the three-phase triangular carrier wave and the three-phase modulating wave, and then compare the three-phase triangular carrier wave and the three-phase modulating wave to determine the control signal.

To sum up, the embodiment of the present application provides an inverter circuit control method, including: determining the non-zero voltage vector in the target space angle area from the non-zero voltage vectors in multiple space angle areas; the target space angle area is multiple The first space angle area or the second space angle area in the three space angle areas, wherein the first number N1 of the non-zero voltage vectors in the first space angle area is greater than the second number N1 of the non-zero voltage vectors in the second space angle area N2, and, there is a preset number of second space angle areas in the middle of every two first space angle areas; determine the action time of the non-zero voltage vector in the target space angle area; according to the non-zero voltage vector in the target space angle area and The action time of the non-zero voltage vector determines the control signal to control the state of the inverter circuit; the control signal is determined by comparing the three-phase triangular carrier wave with the three-phase modulation wave, and one of the three-phase triangular carrier waves The phase difference between the carrier wave and other two-phase triangular carrier waves is a preset angle, and the preset angle is determined according to the non-zero voltage vector in the target space angle area and the action time of the non-zero voltage vector. When generating the control signal, the non-zero voltage vector of the target space angle area is used. The target space angle area can be the first space angle area or the second space angle area in the multiple space angle areas. The non-zero voltage vector of the first space angle area The number of zero-voltage vectors is greater than the number of non-zero-voltage vectors in the second spatial angle region, which can effectively reduce the common-mode voltage.

Moreover, the control signal is determined by comparing the three-phase triangular carrier wave with the three-phase modulation wave. Among the three-phase triangular carrier waves, the phase difference between one phase triangular carrier wave and the other two-phase triangular carrier waves is a preset angle, which makes the control signal The determination method is more flexible.

Optionally, the preset angle is 180 degrees, and the three-phase modulation wave includes three-phase sine waves with a phase difference of 120 degrees.

In some embodiments, the angle ranges of the first space angle area are: 60-120 degrees and 240-300 degrees, and the angle ranges of the second space angle area are: 0-60 degrees, 120-180 degrees, 180-240 degrees and 300-360 degrees. The multiple non-zero voltage vectors corresponding to the first sector can include: U2, U6, U4, U5, the action time of U4 can be T1, the action time of U6 can be T2, the action time of U3 can be T0/2, and U3 is 180 The action time of U4 is adjusted from T1 to T1+T0/2. Figure 9 is a schematic diagram of a wave transmission mode of the first sector provided by the embodiment of the present application, as shown in (a) and (b) in Figure 9, T _ON1 in Figure 9 (a) and (b) , T _ON2 , T _ON3 represent the modulated wave, A, B, C represent the modulated PWM wave, T1, T2 represent the action time. It can be seen that Phase A is equivalent to shifting the triangular carrier wave by 180 degrees or flipping the comparison polarity on the original basis while the comparison polarity remains unchanged.

In the embodiment of the present application, scheme 1: the angle ranges of the first space angle area are: 0-60 degrees and 180-240 degrees, and the angle ranges of the second space angle area are: 60-120 degrees, 120-180 degrees, 240-300 degrees and 300-360 degrees; or;

Scheme 2: The angle ranges of the first space angle area are: 120-180 degrees and 300-360 degrees, and the angle ranges of the second space angle area are: 0-60 degrees, 60-120 degrees, 180-240 degrees and 240- 300 degrees; or;

Scheme 3: The angle ranges of the first space angle area are: 60-120 degrees and 240-300 degrees, and the angle ranges of the second space angle area are: 0-60 degrees, 120-180 degrees, 180-240 degrees and 300- 360 degrees.

Among them, schemes 1, 2, and 3 only need to move the triangular carrier wave of one phase by 180 degrees on the basis of the original SVPWM modulation wave, and generate the switching sequences of each phase by comparison. Scheme 1 is that the B-phase triangular carrier moves 180 degrees unchanged, scheme 2 is that the C-phase triangular carrier moves 180 degrees unchanged, and scheme 3 is that the A-phase triangular carrier moves 180 degrees unchanged. It is simple and easy to implement, and there is no need to frequently shift the phase of the triangular carrier in the ABC three-phase. According to the above-mentioned vector effect, it is equivalent to moving the carrier by 180 degrees, that is, the phases of the three phases do not change frequently. According to the above-mentioned vector synthesis scheme, any phase of the ABC triangular carrier can be simply moved on the basis of the original SVPWM modulation wave. 180 degrees can be obtained.

Figure 10 is a schematic diagram of a three-phase triangular carrier wave corresponding to Scheme 1 provided by the embodiment of the present application. As shown in Figure 10, the B-phase triangular carrier wave moves 180 degrees unchanged; Figure 11 is a scheme 2 provided by the embodiment of the present application The corresponding three-phase triangular carrier schematic diagram, as shown in Figure 11, the C-phase triangular carrier wave moves 180 degrees unchanged; Figure 12 is a schematic diagram of the three-phase triangular carrier wave corresponding to Scheme 3 provided by the embodiment of the present application, as shown in Figure 12 , A-phase triangular carrier moves 180 degrees unchanged.

In the embodiment of this application, the SVPWM modulation can also be realized by the seven-segment method, and can also be directly generated by the scheme of analog synthesis (mathematical synthesis), without the need to judge the sector and action time, which is more convenient and quicker. When three-phase sinusoidal modulation is used, bipolar wave modulation is adopted, and the amplitude and phase difference of the three-phase modulation waves are 120 degrees:

Among them, ω is the angular velocity, t is the time, and the angle included after the ω angular velocity moves for t time is ωt. is the sine wave expression of phase a, is the sine wave expression of phase b, is the sine wave expression of phase c, and M is defined as the modulation ratio, that is, the ratio of the amplitude of the sine wave modulating wave to the amplitude of the triangular carrier.

For bipolar transmission, the duty cycle of the upper tube transmission of a single bridge arm , after SVPWM modulation is adopted, the zero-sequence component is equivalently superimposed: .

in, is the SVPWM modulation wave of phase a, is the b-phase SVPWM modulation wave, is a c-phase SVPWM modulation wave.

After calculation and analysis, it is theoretically deduced that the maximum value of the sum of the duty ratios of any two phases of SVPWM is less than 1.75; however, the sum of the maximum and minimum is always 0, and the minimum and intermediate values are less than or equal to 0. For example, from -30 degrees to 30 degrees, the instantaneous value of phase A is in the middle, the instantaneous value of phase C is the largest, and the instantaneous value of phase B is the smallest, so , , .

If any phase is staggered by 180 degrees, and the sum of the duty ratios of the two phases (maximum and minimum, middle and minimum) is less than 1, it can satisfy that 111 and 000 do not exist, that is, there is no common mode of 1/2 amplitude voltage, only amplitude 1/6 common mode.

In the embodiment of the present application, the control signal is generated, which can be used to control the state of the inverter circuit. Figure 13 is a schematic structural diagram of an inverter circuit provided in the embodiment of the present application. As shown in Figure 13, the inverter circuit can be Three-phase bridge arm inverter topology, the inverter circuit includes: three-phase inductors LA, LB, LC, mos tubes (MOSFET, metal-oxide semiconductor field effect transistors) Q1, Q2, Q3, Q4, Q5, Q6, Capacitors C1 , C2 , C3 , C4 , and C5 , and the connection relationship of each device can be shown in FIG. 10 .

In the three-phase bridge arm inverter topology, the reference point of the input AC line is related to PE, and the far end of the N line is connected to PE. It can be considered that the potential of the N line is equal to the PE potential. The bus bar or bus midpoint voltage on the DC side relative to PE is defined as the common mode voltage of the inverter, and the voltage difference between the positive bus bar and the negative bus bar is the bus bar voltage, so it is equivalent to the DC component. For the system, compared with the DC component, the effect of the AC component is more obvious, especially the high-frequency AC component. The midpoint N' of the bus bar defines the common-mode voltage relative to N. Since it is generally concerned with its AC component, that is, the change value, the common-mode amplitude is characterized by the amplitude, and twice the amplitude is the peak-to-peak value. Wherein, a capacitor can also be used to replace C4 and C5, in this case, the midpoint N' of the busbar is a virtual point.

For the inverter, the high-frequency component refers to the voltage change caused by the switching action. The common-mode voltage cannot be directly calculated, and it needs to be calculated based on the differential-mode voltage. Obviously, each bridge of the three-phase bridge has a switching action, and the upper and lower transistors are complementary to conduction. When the upper transistor is turned on, the output voltage of the node relative to the voltage of the negative bus is Vdc, otherwise the lower transistor is 0; if the relative For N', the conduction of the upper tube is 0.5Vdc, and the conduction of the lower tube is -0.5Vdc. So define the switch function:

Therefore, the differential-mode voltage relative to the bus midpoint can be expressed as , the voltage relative to the negative bus can be expressed as . Generally, the parameters of the three-phase circuit are symmetrical. According to the circuit principle, the voltage difference between the N line and N' is . It can be understood that the instantaneous average value of the three-phase differential mode voltage is the common mode voltage. Among them, each phase has two states, and the three phases have a total of 8 states, and each state corresponds to a space vector, from arrive , the common-mode voltage corresponding to each switch state or space vector is shown in Table 1 below.

Table 1

It can be seen from the table that the corresponding common-mode voltage of each switch state is not the same, but it can be found that the maximum amplitude is 1/2Vdc, followed by 1/6dc. To achieve the one-sixth common-mode effect, the two zero vectors can be removed. In related technologies, AZSVPWM (an improved equivalent zero-vector pulse width modulation) uses non-zero voltage vectors to synthesize zero vectors, commonly used such as adjacent four-vectors, virtual vector synthesis, etc., all need to calculate the equivalent wave in each sector It is more complicated to measure and determine the carrier phase or compare the polarity. In the embodiment of this application, three schemes of vector synthesis are proposed, using a certain vector conversion relationship to ensure that the three-phase triangular carrier maintains a constant effect in the full range of sectors, without changing the phase of the triangular carrier or comparing pole flips. sex.

In summary, the embodiment of this application provides an inverter circuit control method, which is a feasible non-zero voltage vector synthesis method according to a specific four-vector and three-vector comprehensive synthesis scheme; Keep it fixed without switching the phase; there are three types of synthesis schemes according to the sector, and the three types correspond to the three carrier phase relationships. According to the traditional SVPWM modulation or calculation results, it is directly compared with the triangular carrier to obtain the PWM (pulse width modulation) of each phase; due to the use of non-zero voltage vectors, the common-mode voltage amplitude is reduced from 1/2 to 1/6. Reverse verification is based on a single-phase carrier phase shift of 180 degrees, and there is no zero vector in mathematical calculations. It is easy to implement, does not need to change the phase frequently, and can reduce the common-mode voltage, which is more suitable for analog control.

The following describes the inverter circuit control device, inverter module, and storage medium used to implement the inverter circuit control method provided by this application. For the specific implementation process and technical effects, please refer to the relevant content of the above inverter module method , which will not be repeated below.

Fig. 14 is a schematic structural diagram of an inverter circuit control device provided in an embodiment of the present application. As shown in Fig. 14, the device may include:

The determination module 1201 is configured to determine the non-zero voltage vector of the target space angle area from the non-zero voltage vectors of multiple space angle areas; the target space angle area is the first of the multiple space angle areas A space angle area or a second space angle area, wherein the first number N1 of non-zero voltage vectors of the first space angle area is greater than the second number N2 of non-zero voltage vectors of the second space angle area, and, There is a preset number of second space angle areas between each two first space angle areas; determine the action time of the non-zero voltage vector in the target space angle area; according to the non-zero voltage vector of the target space angle area The zero voltage vector and the action time of the non-zero voltage vector determine the waveform control parameters;

The generating module 1202 is configured to generate a control signal according to the waveform control parameters to control the state of the inverter circuit.

Optionally, the determining module 1201 is specifically configured to, if the target spatial angle area is the first spatial angle area, determine the first voltage vector from the non-zero voltage vectors of the plurality of spatial angle areas. The N1 non-zero voltage vectors centered on the space angle area are the non-zero voltage vectors of the first space angle area; if the target space angle area is the second space angle area, from the multiple space angles Among the non-zero voltage vectors in the area, determine N2-1 non-zero voltage vectors centered on the second space angle area, and deflect any non-zero voltage vector in the plurality of non-zero voltage vectors by 180 degrees to obtain One remaining non-zero voltage vector of is the non-zero voltage vector in the second spatial angle region.

Optionally, the N1 non-zero voltage vectors centered on the first space angle region include: two non-zero voltage vectors forming the first space angle region, and the two non-zero voltage vectors Other non-zero voltage vectors adjacent to the voltage vector;

The N2-1 non-zero voltage vectors centered on the second space angle area include: two non-zero voltage vectors forming the second space angle area.

Optionally, the angle ranges of the first space angle area are: 0-60 degrees and 180-240 degrees, and the angle ranges of the second space angle area are: 60-120 degrees, 120-180 degrees, 240- 300 degrees and 300-360 degrees; or;

The angle ranges of the first space angle area are: 120-180 degrees and 300-360 degrees, and the angle ranges of the second space angle area are: 0-60 degrees, 60-120 degrees, 180-240 degrees and 240 degrees -300 degrees; or;

The angle ranges of the first space angle area are: 60-120 degrees and 240-300 degrees, and the angle ranges of the second space angle area are: 0-60 degrees, 120-180 degrees, 180-240 degrees and 300 degrees -360 degrees.

Optionally, if the target space angle area is the first space angle area, the determining module 1201 is specifically configured to determine, among the non-zero voltage vectors in the first space angle area, the first space angle The action times of two non-zero voltage vectors adjacent to the area are T1 and T2 respectively; among the non-zero voltage vectors in the first spatial angle area, the action time of other non-zero voltage vectors is one-half of T0, Among them, T0=1-T1-T2.

Optionally, if the target space angle area is the second space angle area, the determining module 1201 is specifically configured to determine, among the non-zero voltage vectors in the second space angle area, the second space angle The action time of two non-zero voltage vectors adjacent to the area is T1 and T2; among the non-zero voltage vectors in the second spatial angle area, the action time of other non-zero voltage vectors is 1/2 of T0; adjust Among the two non-zero voltage vectors, the action time of the non-zero voltage vector that is 180 degrees different from the other non-zero voltage vectors is T1 plus one-half of the T0, or T2 plus two of the T0. one-third.

The embodiment of the present application also provides an inverter circuit control device, which includes:

A determination module, configured to determine the non-zero voltage vector of the target space angle area from the non-zero voltage vectors of multiple space angle areas; the target space angle area is the first space in the multiple space angle areas A corner area or a second space angle area, wherein the first number N1 of non-zero voltage vectors in the first space angle area is greater than the second number N2 of non-zero voltage vectors in the second space angle area, and, every There is a preset number of second space angle areas between the two first space angle areas; determine the action time of the non-zero voltage vector of the target space angle area; according to the non-zero voltage vector of the target space angle area The voltage vector and the action time of the non-zero voltage vector determine the control signal to control the state of the inverter circuit; wherein the control signal is determined by comparing the three-phase triangular carrier wave with the three-phase modulation wave, the Among the three-phase triangular carriers, one of the three-phase triangular carriers has a phase difference with the other two-phase triangular carriers by a preset angle, and the preset angle is based on the non-zero voltage vector in the target space angle area and the non-zero voltage vector The duration of action is determined.

Optionally, the preset angle is 180 degrees, and the three-phase modulation wave includes three-phase sine waves with a phase difference of 120 degrees.

The above-mentioned apparatus is used to execute the methods provided in the foregoing embodiments, and its implementation principles and technical effects are similar, and details are not repeated here.

The above modules may be one or more integrated circuits configured to implement the above method, for example: one or more specific integrated circuits (Application Specific Integrated Circuit, referred to as ASIC), or one or more microprocessors (digital singnal processor, DSP for short), or, one or more Field Programmable Gate Arrays (Field Programmable Gate Array, FPGA for short), etc. For another example, when one of the above modules is implemented in the form of a processing element scheduling program code, the processing element may be a general-purpose processor, such as a central processing unit (Central Processing Unit, referred to as CPU) or other processors that can call program codes. For another example, these modules can be integrated together and implemented in the form of a system-on-a-chip (SOC for short).

Fig. 15 is a schematic structural diagram of an inverter module provided by the embodiment of the present application. As shown in Fig. 15, the inverter module includes: an inverter circuit 1301 and a controller 1302, and the inverter circuit 1301 is connected to the controller 1302;

The controller 1302 includes: a memory 1302a and a processor 1302b. The memory 1302a stores a computer program executable by the processor 1302b. When the processor 1302b executes the computer program, the above inverter circuit control method is realized, and a control signal is output to the inverter circuit 1301. To control the switch state in the inverter circuit 1301 . The specific implementation manner and technical effect are similar, and will not be repeated here.

Optionally, the present invention further provides a program product, such as a computer-readable storage medium, including a program, and the program is used to execute the foregoing method embodiments when executed by a processor.

In the several embodiments provided by the present invention, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware, or in the form of hardware plus software functional units.

The above-mentioned integrated units implemented in the form of software functional units may be stored in a computer-readable storage medium. The above-mentioned software functional units are stored in a storage medium, and include several instructions to enable a computer device (which may be a personal computer, server, or network device, etc.) or a processor (English: processor) to execute the functions described in various embodiments of the present invention. part of the method. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (English: Read-Only Memory, abbreviated: ROM), random access memory (English: Random Access Memory, abbreviated: RAM), magnetic disk or optical disc, etc. A medium on which program code can be stored.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (9)

1. An inverter circuit control method, comprising:

determining a non-zero voltage vector of a target spatial angular region from the non-zero voltage vectors of the plurality of spatial angular regions; the target space angle region is a first space angle region or a second space angle region in the plurality of space angle regions, wherein a first number N1 of non-zero voltage vectors of the first space angle region is greater than a second number N2 of non-zero voltage vectors of the second space angle region, and a preset number of second space angle regions are spaced between every two first space angle regions;

determining the action time of the non-zero voltage vector of the target space angle region;

determining waveform control parameters according to the nonzero voltage vector of the target space angle region and the action time of the nonzero voltage vector;

generating a control signal according to the waveform control parameter to control the state of an inverter circuit;

the determining a non-zero voltage vector of the target spatial angular region from the non-zero voltage vectors of the plurality of spatial angular regions comprises:

if the target space angle region is the first space angle region, determining N1 non-zero voltage vectors with the first space angle region as the center from the non-zero voltage vectors of the plurality of space angle regions, wherein the N1 non-zero voltage vectors are the non-zero voltage vectors of the first space angle region;

if the target space angle region is the second space angle region, determining N2-1 non-zero voltage vectors with the second space angle region as the center from the non-zero voltage vectors of the plurality of space angle regions, and determining one remaining non-zero voltage vector obtained by deflecting any non-zero voltage vector in the plurality of non-zero voltage vectors by 180 degrees as the non-zero voltage vector of the second space angle region.

2. The method of claim 1, wherein the N1 non-zero voltage vectors centered at the first spatial angular region comprise: two non-zero voltage vectors constituting the first spatial angular region, and other non-zero voltage vectors adjacent to the two non-zero voltage vectors;

the N2-1 non-zero voltage vectors centered at the second spatial angular region include: two non-zero voltage vectors constituting said second spatial angular region.

3. The method of claim 1, wherein the angular extent of the first spatial angular region is: 0-60 degrees and 180-240 degrees, the angular range of the second spatial angular region being: 60-120 degrees, 120-180 degrees, 240-300 degrees, and 300-360 degrees; or;

the angular range of the first spatial angular region is: 120-180 degrees and 300-360 degrees, the angular range of the second spatial angular region being: 0-60 degrees, 60-120 degrees, 180-240 degrees, and 240-300 degrees; or;

the angular range of the first spatial angular region is: 60-120 degrees and 240-300 degrees, the angular range of the second spatial angular region being: 0-60 degrees, 120-180 degrees, 180-240 degrees, and 300-360 degrees.

4. The method of claim 1, wherein if the target spatial angular region is the first spatial angular region, the determining the action time of the non-zero voltage vector of the target spatial angular region comprises:

determining action time of two adjacent non-zero voltage vectors in the first space angle region as T1 and T2 respectively in the non-zero voltage vectors in the first space angle region;

and determining the action time of other non-zero voltage vectors in the first space angle region to be one half of T0, wherein T0=1-T1-T2.

5. The method of claim 1, wherein if the target spatial angular region is the second spatial angular region, the determining the action time of the non-zero voltage vector of the target spatial angular region comprises:

determining action time of two adjacent non-zero voltage vectors in the second space angle region as T1 and T2 in the non-zero voltage vectors in the second space angle region;

determining the action time of other non-zero voltage vectors in the second space angle area to be one half of T0;

and adjusting the action time of a non-zero voltage vector which is 180 degrees different from the other non-zero voltage vectors in the two non-zero voltage vectors to be T1 plus one half of T0, or T2 plus one half of T0.

6. An inverter circuit control method, comprising:

determining a non-zero voltage vector of a target spatial angular region from the non-zero voltage vectors of the plurality of spatial angular regions; the target space angle region is a first space angle region or a second space angle region in the plurality of space angle regions, wherein a first number N1 of non-zero voltage vectors of the first space angle region is greater than a second number N2 of non-zero voltage vectors of the second space angle region, and a preset number of second space angle regions are spaced between every two first space angle regions;

determining the action time of the non-zero voltage vector of the target space angle region;

determining a control signal according to the nonzero voltage vector of the target space angle region and the action time of the nonzero voltage vector so as to control the state of an inverter circuit;

the control signal is determined by comparing three-phase triangular carriers with three-phase modulation waves, the phase difference between one phase of the three-phase triangular carrier and the other two phases of the three-phase triangular carrier is a preset angle, and the preset angle is determined according to a non-zero voltage vector of the target space angle area and the action time of the non-zero voltage vector;

the determining a non-zero voltage vector of the target spatial angular region from the non-zero voltage vectors of the plurality of spatial angular regions comprises:

if the target space angle region is the first space angle region, determining N1 non-zero voltage vectors with the first space angle region as the center from the non-zero voltage vectors of the plurality of space angle regions, wherein the N1 non-zero voltage vectors are the non-zero voltage vectors of the first space angle region;

if the target space angle region is the second space angle region, determining N2-1 non-zero voltage vectors with the second space angle region as the center from the non-zero voltage vectors of the plurality of space angle regions, and determining one remaining non-zero voltage vector obtained by deflecting any non-zero voltage vector in the plurality of non-zero voltage vectors by 180 degrees as the non-zero voltage vector of the second space angle region.

7. The method according to claim 6, wherein the preset angle is 180 degrees, and the three-phase modulated wave comprises three-phase sine waves having phases different by 120 degrees.

8. An inverter circuit control device, comprising:

the device comprises a determining module, a calculating module and a judging module, wherein the determining module is used for determining a non-zero voltage vector of a target space angle region from the non-zero voltage vectors of a plurality of space angle regions; the target space angle region is a first space angle region or a second space angle region in the plurality of space angle regions, wherein a first number N1 of non-zero voltage vectors of the first space angle region is greater than a second number N2 of non-zero voltage vectors of the second space angle region, and a preset number of second space angle regions are spaced between every two first space angle regions; determining the action time of the non-zero voltage vector of the target space angle region; determining waveform control parameters according to the non-zero voltage vector of the target space angle region and the action time of the non-zero voltage vector;

the generating module is used for generating a control signal according to the waveform control parameter so as to control the state of the inverter circuit;

the determining module is specifically configured to determine, if the target spatial angle region is the first spatial angle region, N1 nonzero voltage vectors centered around the first spatial angle region from the nonzero voltage vectors of the multiple spatial angle regions, and the N1 nonzero voltage vectors are the nonzero voltage vectors of the first spatial angle region; if the target space angle area is the second space angle area, determining N2-1 non-zero voltage vectors taking the second space angle area as the center from the non-zero voltage vectors of the plurality of space angle areas, and determining one rest non-zero voltage vector obtained by deflecting any non-zero voltage vector in the plurality of non-zero voltage vectors by 180 degrees as the non-zero voltage vector of the second space angle area.

9. An inverter module, comprising: the inverter circuit is connected with the controller;

the controller includes: a memory storing a computer program executable by the processor, and a processor implementing the inverter circuit control method according to any one of claims 1 to 7 when the computer program is executed by the processor, and outputting the control signal to the inverter circuit to control a switching state in the inverter circuit.

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