Signal modulation method and device, equipment and storage medium

Abstract

The invention provides a signal modulation method and device, equipment and a storage medium, and the method comprises the steps: obtaining a three-phase phase voltage and a bus voltage corresponding to a signal modulation request in response to the signal modulation request; determining a target modulation parameter corresponding to the three-phase voltage according to a first target phase voltage and a second target phase voltage in the three-phase voltage and the bus voltage; and generating a target control signal corresponding to the signal modulation request according to the target modulation parameter and the three-phase phase voltage. The control effect corresponding to space vector pulse width modulation is achieved, the calculation amount of signal modulation control is effectively reduced, and the calculation precision of signal modulation control is improved.

Description

Technical Field

[0001] The present application relates to the field of signal modulation technology, and in particular to a signal modulation method, device, equipment and storage medium. Background Art

[0002] At present, existing AC motor drivers and other devices usually use space vector pulse width modulation (SVPWM) for modulation, which can control the output power of the motor by adjusting the pulse width of the motor input voltage. However, the existing space vector pulse width modulation algorithm is relatively complex, requiring interval judgment and vector action time calculation, and the implementation process is complex, the amount of calculation is large and affects the calculation accuracy, which is difficult to meet the existing equipment control needs. Summary of the invention

[0003] The embodiments of the present application provide a signal modulation method, apparatus, device and storage medium, aiming to solve the technical problem in the prior art that the space vector pulse width modulation algorithm has a complex algorithm and low calculation accuracy, which affects the signal modulation accuracy.

[0004] On the one hand, an embodiment of the present application provides a signal modulation method, the signal modulation method comprising the following steps:

[0005] In response to the signal modulation request, obtaining the three-phase voltage and bus voltage corresponding to the signal modulation request;

[0006] Determine a target modulation parameter corresponding to the three-phase voltage according to a first target phase voltage and a second target phase voltage in the three-phase voltage and the bus voltage;

[0007] A target control signal corresponding to the signal modulation request is generated according to the target modulation parameter and the three-phase voltage.

[0008] In a possible implementation of the present application, determining the target modulation parameters corresponding to the three-phase voltages according to the first target phase voltage and the second target phase voltage in the three-phase voltages and the bus voltage includes:

[0009] Obtaining a first phase voltage, a second phase voltage and a third phase voltage among the three-phase voltages;

[0010] comparing the first phase voltage, the second phase voltage and the third phase voltage to obtain a first target phase voltage among the three-phase voltages and a second target phase voltage among the three-phase voltages;

[0011] calculating a phase voltage difference between the first target phase voltage and the second target phase voltage;

[0012] The target modulation parameters corresponding to the three-phase voltages are determined according to the phase voltage differences and the bus voltages.

[0013] In a possible implementation of the present application, determining the target modulation parameter corresponding to the three-phase voltage according to the phase voltage difference and the bus voltage includes:

[0014] If the phase voltage difference is greater than the bus voltage, determining a voltage reduction amplitude coefficient according to the phase voltage difference and the bus voltage;

[0015] The three-phase voltages are uniformly reduced according to the voltage reduction amplitude coefficient to obtain updated three-phase voltages, wherein the updated three-phase voltages include a first updated phase voltage, a second updated phase voltage, a third updated phase voltage, a first target updated phase voltage, and a second target updated phase voltage;

[0016] The target modulation parameter corresponding to the updated three-phase phase voltage is calculated according to the first target updated phase voltage and the second target updated phase voltage.

[0017] In a possible implementation of the present application, the target modulation parameter includes a first target modulation parameter;

[0018] The calculating the target modulation parameter corresponding to the updated three-phase voltage according to the first target updated phase voltage and the second target updated phase voltage comprises:

[0019] Calculating the sum of the first target updated phase voltage and the second target updated phase voltage to obtain a first initial modulation parameter;

[0020] The product of the initial modulation parameter and the preset modulation coefficient is calculated to obtain the first target modulation parameter corresponding to the updated three-phase phase voltage.

[0021] In a possible implementation of the present application, the target modulation parameter further includes a second target modulation parameter;

[0022] The determining the target modulation parameter corresponding to the three-phase voltage according to the phase voltage difference and the bus voltage includes:

[0023] If the phase voltage difference is less than the bus voltage, then calculating the sum of the first target phase voltage and the second target phase voltage to obtain a second initial modulation parameter;

[0024] The product of the second initial modulation parameter and the preset modulation coefficient is calculated to obtain a second target modulation parameter corresponding to the three-phase voltage.

[0025] In a possible implementation of the present application, generating a target control signal corresponding to the signal modulation request according to the target modulation parameter and the three-phase voltage includes:

[0026] Acquire a first target modulation parameter among the target modulation parameters, and an updated three-phase phase voltage corresponding to the three-phase phase voltage;

[0027] Injecting the first target modulation parameter into the updated three-phase voltage to obtain a first target modulation wave signal;

[0028] The target control signal corresponding to the signal modulation request is obtained by comparing the first target modulation wave signal with the high-frequency triangular carrier of the target carrier generator.

[0029] In a possible implementation of the present application, generating a target control signal corresponding to the signal modulation request according to the target modulation parameter and the three-phase voltage includes:

[0030] Acquire a second target modulation parameter among the target modulation parameters;

[0031] Injecting the second target modulation parameter into the three-phase voltage to obtain a second target modulation wave signal;

[0032] The target control signal corresponding to the signal modulation request is obtained by comparing the second target modulation wave signal with the high-frequency triangular carrier of the target carrier generator.

[0033] On the other hand, the present application provides a signal modulation device, the signal modulation device comprising:

[0034] A voltage acquisition module is configured to respond to a signal modulation request and obtain three-phase voltages and a bus voltage corresponding to the signal modulation request;

[0035] A signal modulation module, configured to determine a target restriction strategy of the target upgrade platform according to the predicted traffic data and a preset bandwidth control threshold;

[0036] The signal generating module is configured to generate a target control signal corresponding to the signal modulation request according to the target modulation parameter and the three-phase voltage.

[0037] On the other hand, the present application also provides a signal modulation device, the signal modulation device comprising:

[0038] one or more processors;

[0039] Memory; and

[0040] One or more applications, wherein the one or more applications are stored in the memory and configured to be executed by the processor to implement the steps of the signal modulation method.

[0041] On the other hand, the present application also provides a computer-readable storage medium on which a computer program is stored, and the computer program is loaded by a processor to execute the steps in the signal modulation method.

[0042] In the present application, by responding to a signal modulation request, the three-phase voltage and bus voltage corresponding to the signal modulation request are obtained; the target modulation parameters corresponding to the three-phase voltage are determined according to the first target phase voltage and the second target phase voltage in the three-phase voltage, and the bus voltage; the target control signal corresponding to the signal modulation request is generated according to the target modulation parameters and the three-phase voltage. The corresponding modulation parameters are generated according to the first target phase voltage and the second target phase voltage in the three-phase voltage, and the bus voltage, and the modulation parameters are injected into the saddle-shaped modulation wave signal in the three-phase voltage, and then converted into the corresponding control signal, which can be equivalent to the control effect corresponding to the space vector pulse width modulation, and effectively reduce the calculation amount of the signal modulation control, and improve the calculation accuracy of the signal modulation control. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0044] Figure 1 A schematic diagram of a scenario of a signal modulation method according to an embodiment of the present application;

[0045] Figure 2 A schematic diagram of a flow chart of an embodiment of a signal modulation method in an embodiment of the present application;

[0046] Figure 3 A waveform diagram of an embodiment of a target modulation wave signal generated in the signal modulation method provided in an embodiment of the present application;

[0047] Figure 4 A circuit diagram of an embodiment of a three-phase inverter circuit to be controlled in a signal modulation method provided in an embodiment of the present application;

[0048] Figure 5 A schematic diagram of the structure of an embodiment of a signal modulation device provided in an embodiment of the present application;

[0049] Figure 6A schematic diagram of the structure of an embodiment of a signal modulation device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0051] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention 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 understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0052] In this application, the word "exemplary" is used to mean "serving as an example, illustration, or illustration." Any embodiment described in this application as "exemplary" is not necessarily to be construed as being preferred or advantageous over other embodiments. The following description is given to enable any person skilled in the art to implement and use the invention. In the following description, details are listed for the purpose of explanation. It should be understood that a person of ordinary skill in the art can recognize that the invention can be implemented without using these specific details. In other instances, well-known structures and processes are not elaborated in detail to avoid obscuring the description of the invention with unnecessary details. Therefore, the present invention is not intended to be limited to the embodiments shown, but is consistent with the widest scope consistent with the principles and features disclosed in this application.

[0053] At present, existing AC motor drivers and other devices usually use space vector pulse width modulation (SVPWM) for modulation, which can control the output power of the motor by adjusting the pulse width of the motor input voltage. However, the existing space vector pulse width modulation algorithm is relatively complex, requiring interval judgment and vector action time calculation, and the implementation process is complex, the amount of calculation is large and affects the calculation accuracy, which is difficult to meet the existing equipment control needs.

[0054] Based on this, the present application proposes a signal modulation method, device, equipment and computer-readable storage medium to solve the technical problems in the prior art that the space vector pulse width modulation algorithm has complex algorithm and low calculation accuracy, which affects the signal modulation accuracy.

[0055] The signal modulation method in the embodiment of the present invention is applied to a signal modulation device, and the signal modulation device is arranged in a signal modulation device, and the signal modulation device is provided with one or more processors, a memory, and one or more application programs, wherein the one or more application programs are stored in the memory and configured to be executed by the processor to implement the signal modulation method; wherein the signal modulation device may be an intelligent terminal capable of three-phase voltage control. For example, the signal modulation device may be a main control device in a device such as an AC motor or an inverter device.

[0056] like Figure 1 As shown, Figure 1 This is a scenario diagram of the signal modulation method in an embodiment of the present application. The signal modulation scenario in the embodiment of the present invention includes a signal modulation device 100 (a signal modulation device is integrated in the signal modulation device 100), and a computer-readable storage medium corresponding to the signal modulation method is running in the signal modulation device 100 to execute the steps of the signal modulation method.

[0057] Understandably, Figure 1 The signal modulation device in the signal modulation method scenario shown, or the device included in the signal modulation device, does not constitute a limitation on the embodiments of the present invention, that is, the number of devices and types of devices of the signal modulation device included in the signal modulation method scenario, or the number of devices and types of devices included in each device do not affect the overall implementation of the technical solution in the embodiments of the present invention, and can all be regarded as equivalent replacements or derivatives of the technical solution claimed to be protected in the embodiments of the present invention.

[0058] The signal modulation device 100 in the embodiment of the present invention is mainly used to: respond to a signal modulation request and obtain a three-phase voltage and a bus voltage corresponding to the signal modulation request;

[0059] Determine a target modulation parameter corresponding to the three-phase voltage according to a first target phase voltage and a second target phase voltage in the three-phase voltage and the bus voltage;

[0060] A target control signal corresponding to the signal modulation request is generated according to the target modulation parameter and the three-phase voltage.

[0061] The embodiments of the present application provide a signal modulation method, apparatus, device, and computer-readable storage medium, which are described in detail below.

[0062] It can be understood by those skilled in the art that Figure 1 The application environment shown in is only one of the application scenarios related to the present application solution and does not constitute a limitation on the application scenario of the present application solution. Other application environments may also include Figure 1 More or fewer signal modulation devices, or signal modulation network connection relationships shown, such as Figure 1 Only one signal modulation device is shown. It can be understood that the scenario of the signal modulation method can also include one or more signal modulation devices, which is not specifically limited here. The signal modulation device 100 can also include a memory for storing voltage data and other data.

[0063] It should be noted that Figure 1 The scenario diagram of the signal modulation method shown is only an example. The scenario of the signal modulation method described in the embodiment of the present invention is to more clearly illustrate the technical solution of the embodiment of the present invention, and does not constitute a limitation on the technical solution provided by the embodiment of the present invention.

[0064] Based on the scenario of the above signal modulation method, various embodiments of the signal modulation method disclosed in the present invention are proposed.

[0065] like Figure 2 As shown, Figure 2 This is a flow chart of an embodiment of a signal modulation method in an embodiment of the present application. The signal modulation method includes the following steps 201 to 203:

[0066] 201. In response to a signal modulation request, obtain three-phase voltages and a bus voltage corresponding to the signal modulation request;

[0067] The signal modulation method in this embodiment is applied to a signal modulation device, and the type and quantity of the signal modulation device are not specifically limited, that is, the signal modulation device can be one or more electronic devices such as motor control devices or inverter devices.

[0068] Specifically, since most existing motor controls or inverter controls are controlled using a space vector pulse width modulation algorithm, the calculation process of the space vector pulse width modulation algorithm is relatively complex and requires interval judgment and vector action time calculation, resulting in a large amount of calculation and low calculation accuracy. Therefore, in this embodiment, a signal modulation method is proposed to generate a target control signal equivalent to the space vector pulse width modulation algorithm, thereby reducing the control calculation amount of electronic equipment and improving the control accuracy of each electronic equipment.

[0069] Specifically, the signal modulation device responds to a signal modulation request during operation, wherein the signal modulation request is an operation event for driving the signal modulation device to modulate according to the three-phase voltage and the corresponding bus voltage to obtain a target control signal. The triggering method of the signal modulation request is not specifically limited here, that is, the voltage control request can be triggered by a user, for example, the user issues a control instruction through the signal modulation device or a remote control device associated with the signal modulation device, thereby triggering the signal modulation request. Optionally, in other embodiments, the signal modulation request can also be automatically triggered by the signal modulation device, for example, an automatic control process is provided in the signal modulation device, and the signal modulation request is automatically triggered when the control conditions corresponding to the automatic control process are met.

[0070] Specifically, after obtaining the signal modulation request, the signal modulation device also collects the three-phase voltage and bus voltage of the device or component to be controlled by the signal modulation request. The three-phase voltage is the amplitude corresponding to the device to be controlled pointed to by the signal modulation request. The bus voltage is a sine wave with a phase difference of 120°. The bus voltage is used to control the voltage of the DC bus or AC bus of the power converter.

[0071] Specifically, after obtaining the three-phase phase voltage and bus voltage corresponding to the signal modulation request, the signal modulation device further modulates according to the three-phase phase voltage and bus phase voltage in a subsequent step, thereby generating a target control signal equivalent to a space vector pulse width modulation signal.

[0072] 202. Determine a target modulation parameter corresponding to the three-phase voltage according to a first target phase voltage and a second target phase voltage among the three-phase voltages and the bus voltage;

[0073] Specifically, after acquiring the three-phase voltage and the bus voltage, the signal modulation device also determines the target modulation parameter corresponding to the three-phase voltage according to the first target phase voltage and the second target phase voltage in the three-phase voltage, and the bus voltage. The target modulation parameter is the zero-sequence vector to be modulated for the three-phase voltage. The first target phase voltage is the target phase voltage with the largest phase voltage value among the three-phase voltages. The second target phase voltage is the target phase voltage with the smallest phase voltage value among the three-phase voltages.

[0074] Specifically, after obtaining the three-phase phase voltage corresponding to the signal modulation request, the signal modulation device reads the first phase voltage, the second phase voltage and the third phase voltage in the three-phase phase voltage, wherein the first phase voltage, the second phase voltage and the third phase voltage are phase voltage parameters corresponding to each phase (i.e., the first phase, the second phase and the third phase) in the three-phase phase voltage.

[0075] Specifically, after obtaining the first phase voltage, the second phase voltage and the third phase voltage, the voltage debugging device compares the phase voltages between the first phase voltage, the second phase voltage and the third phase voltage, thereby obtaining the first target phase voltage with the largest phase voltage among the three-phase voltages and the second target phase voltage with the smallest phase voltage among the three-phase voltages.

[0076] Specifically, after obtaining the first target phase voltage and the second target phase voltage, the voltage debugging device also calculates the phase voltage difference between the first target phase voltage and the second target phase voltage, and determines the target modulation parameter to be modulated for the three-phase phase voltage according to the phase voltage difference and the bus voltage. The target modulation parameter includes the first target modulation parameter and the second target modulation parameter. The first target modulation parameter is a zero-sequence vector for modulating the updated three-phase phase voltage after equal amplitude reduction. The second target modulation parameter is a zero-sequence vector for modulating the three-phase phase voltage.

[0077] Specifically, after obtaining the phase voltage difference, in order to prevent over-modulation, the voltage debugging device also compares the phase voltage difference with the bus voltage, and determines whether the three-phase voltage needs to be equally reduced based on the comparison result.

[0078] Optionally, if the phase voltage difference is greater than the bus voltage, the voltage debugging device determines that the three-phase phase voltage may be over-modulated, and then the three-phase phase voltage is equally reduced in the subsequent modulation step to avoid over-modulation of the three-phase phase voltage during the modulation process.

[0079] Optionally, if the phase voltage difference is less than or equal to the bus voltage, the voltage debugging device determines that the three-phase voltage will not be over-modulated during modulation. Therefore, the voltage debugging device directly determines the target modulation parameters corresponding to the three-phase voltage based on the first target phase voltage and the second target phase voltage.

[0080] Optionally, in a specific embodiment, the voltage debugging device determines that the phase voltage difference of the three-phase phase voltage is greater than the bus voltage, that is, the voltage debugging device determines that there is a risk of overmodulation of the three-phase phase voltage, then determines the voltage reduction amplitude attribute of the three-phase phase voltage based on the phase voltage difference and the bus voltage.

[0081] Specifically, after the voltage debugging device determines that the three-phase phase voltage needs to be equally reduced, the ratio of the bus voltage and the phase voltage difference is calculated to obtain the voltage reduction amplitude coefficient corresponding to the three-phase phase voltage, and the phase voltage reduction amplitude coefficient is used to perform equal reduction to obtain the updated three-phase phase voltage. The updated three-phase phase voltage includes a first updated phase voltage, a second updated phase voltage, a third updated phase voltage, a first target updated phase voltage, and a second target updated phase voltage. The calculation method of the updated three-phase phase voltage is as follows:

[0082] V ao更新 =U ao *U dc / (V max -V min )

[0083] U bo更新 =U bo *U dc / (V max -V min )

[0084] U co更新 =U co *U dc / (V max -V min )

[0085] V max更新 =V max *U dc / (V max -V min )

[0086] V min更新 =V min *U dc / (V max -V min )

[0087] Among them, U ao更新 , U bo更新 , Uco更新 The first updated phase voltage, the second updated phase voltage, and the third updated phase voltage are respectively asked; V max更新 and V min更新 U is the first target updated phase voltage and the second target updated phase voltage respectively; dc / (V max -V min ) is the voltage reduction coefficient of the three-phase phase voltage.

[0088] Specifically, after acquiring the updated three-phase phase voltage, the signal modulation device further calculates the target modulation parameter corresponding to the updated three-phase phase voltage according to the first target updated phase voltage and the second target updated phase voltage in the updated three-phase phase voltage.

[0089] Specifically, after obtaining the first target updated phase voltage and the second target updated phase voltage, the signal modulation device also calculates the sum of the first target updated phase voltage and the second target updated phase voltage to obtain the first initial modulation parameter, and after obtaining the first initial modulation parameter, calculates the product of the initial modulation parameter and the preset modulation coefficient to obtain the first target modulation parameter corresponding to the updated three-phase phase voltage. The preset modulation coefficient is a constant coefficient used to calculate the target modulation coefficient. In a specific embodiment, the preset modulation coefficient is -0.5. The calculation formula corresponding to the first target modulation parameter is as follows:

[0090] U on1 =A*(V max更新 +V min更新 )

[0091] Among them, U on1 is the first target modulation parameter, and A is the preset modulation coefficient.

[0092] Optionally, in other embodiments, if the signal modulation device determines that there is no risk of overmodulation of the three-phase voltage, the voltage debugging device directly determines the target modulation parameter corresponding to the three-phase voltage based on the first target phase voltage, the second target phase voltage and the preset modulation coefficient. That is, the signal modulation device calculates the sum of the first target phase voltage and the second target phase voltage to obtain the first initial modulation parameter, and after obtaining the first initial modulation parameter, calculates the product of the initial modulation parameter and the preset modulation coefficient to obtain the second target modulation parameter corresponding to the three-phase voltage. The calculation formula corresponding to the second target modulation parameter is as follows:

[0093] U on2 =A*(V max +V min )

[0094] Among them, U on2 is the second target modulation parameter, and A is the preset modulation coefficient.

[0095] Specifically, after acquiring the target modulation parameters corresponding to the three-phase voltage, the signal modulation device further modulates the three-phase voltage using the target modulation parameters, thereby obtaining a target control signal.

[0096] 203. Generate a target control signal corresponding to the signal modulation request according to the target modulation parameter and the three-phase voltage.

[0097] Specifically, after obtaining the target modulation parameters corresponding to the three-phase phase voltage or the updated three-phase phase voltage after equal amplitude reduction, the signal modulation device generates a target control signal corresponding to the signal modulation request according to the target modulation parameters, the three-phase phase voltage and the high-frequency triangular carrier of the target carrier generator, and then controls the specified inverter or the specified motor equipment according to the target control signal to obtain the target control result.

[0098] Specifically, after obtaining the target modulation parameters corresponding to the three-phase voltage or the updated three-phase voltage after equal amplitude reduction, the signal modulation device injects the target modulation parameters into the three-phase voltage or the updated three-phase voltage after equal amplitude reduction, thereby eliminating the three-phase peak and obtaining the target modulation wave signal. Figure 3 As shown, Figure 3 A waveform diagram of an embodiment of a target modulation wave signal generated in the signal modulation method provided in an embodiment of the present application, such as Figure 3 In the illustrated embodiment, the target modulation wave signal is a saddle-shaped modulation wave signal.

[0099] Specifically, after obtaining the first target modulation parameter in the target modulation parameter, the signal modulation device further obtains the updated three-phase voltage after the three-phase voltage is equally reduced, and injects the first target modulation parameter into the updated three-phase voltage to obtain the first target modulation wave signal.

[0100] Specifically, after obtaining the first target modulation parameter, the signal modulation device calculates the sum of the first target modulation parameter and the first updated phase voltage, the second updated phase voltage and the third updated phase voltage respectively to obtain the first target modulation wave signal, specifically, the first target modulation wave signal is the three-phase terminal voltage corresponding to the updated three-phase phase voltage. The calculation formula of the first target modulation wave signal is as follows:

[0101] U an更新 =U ao更新 +U on1

[0102] U bn更新 =U bo更新 +U on1

[0103] Ucn更新 =U co更新 +U on1

[0104] Among them, the U an更新 , U bn更新 and U cn更新 are respectively the three-phase terminal voltages corresponding to the first target modulation wave signal.

[0105] Specifically, after the signal modulation device injects the first target modulation parameter into the updated three-phase phase voltage to obtain the first target modulation wave signal, the first target modulation wave signal is compared with the high-frequency triangular carrier of the target carrier generator, thereby performing signal modulation on the first target modulation wave signal to obtain the target control signal corresponding to the signal modulation request, and using the target control signal to control the three-phase inverter circuit corresponding to the signal modulation device, such as Figure 4 As shown, Figure 4 A circuit diagram of an embodiment of a three-phase inverter circuit to be controlled in the signal modulation method provided in an embodiment of the present application. Figure 4 In the embodiment shown, after the signal modulation device modulates to obtain the target control signal, it also sends the target control signal to the three-phase inverter circuit, so as to use the target control signal to control the on / off state of each switch in the three-phase inverter circuit. Optionally, in a specific embodiment, the target control signal is a switch control signal in the three-phase inverter circuit.

[0106] Optionally, in other embodiments, the signal modulation device also obtains a second target modulation parameter in the target modulation parameter, and injects the second target adjustment parameter into the three-phase voltage to obtain a second target modulation carrier signal, and compares the second target modulation carrier signal with the high-frequency triangular carrier of the target carrier generator to obtain a target control signal corresponding to the signal modulation request, and uses the target control signal to control the three-phase inverter circuit corresponding to the signal modulation device.

[0107] Specifically, after obtaining the second target modulation parameter, the signal modulation device calculates the sum of the second target modulation parameter and the first phase voltage, the second phase voltage and the third phase voltage respectively to obtain the second target modulation wave signal, specifically, the second target modulation wave signal is the three-phase terminal voltage corresponding to the three-phase voltage. The calculation formula of the first target modulation wave signal is as follows:

[0108] U an =U ao +U on1

[0109] U bn =U bo +U on1

[0110] U cn =U co +U on1

[0111] Among them, the U an , U bn and U cn are respectively the three-phase terminal voltages corresponding to the second target modulated wave signal.

[0112] In this embodiment, the signal modulation device obtains the three-phase voltage and bus voltage corresponding to the signal modulation request by responding to the signal modulation request; determines the target modulation parameters corresponding to the three-phase voltage according to the first target phase voltage and the second target phase voltage in the three-phase voltage, and the bus voltage; generates the target control signal corresponding to the signal modulation request according to the target modulation parameters and the three-phase voltage. The corresponding modulation parameters are generated according to the first target phase voltage and the second target phase voltage in the three-phase voltage, and the bus voltage, and the modulation parameters are injected into the saddle-shaped modulation wave signal in the three-phase voltage, and then converted into the corresponding control signal, which can be equivalent to the control effect corresponding to the space vector pulse width modulation, and effectively reduce the calculation amount of the signal modulation control, and improve the calculation accuracy of the signal modulation control.

[0113] In order to better implement the signal modulation method in the embodiment of the present application, based on the signal modulation method, the embodiment of the present application also provides a signal modulation device, such as Figure 5 As shown, Figure 5 The structure diagram of the signal modulation device provided in the embodiment of the present application is as follows. Specifically, the signal modulation device 300 includes:

[0114] The voltage acquisition module 301 is configured to respond to the signal modulation request and obtain the three-phase voltage and bus voltage corresponding to the signal modulation request;

[0115] The signal modulation module 302 is configured to determine a target restriction strategy of the target upgrade platform according to the predicted traffic data and a preset bandwidth control threshold;

[0116] The signal generating module 303 is configured to generate a target control signal corresponding to the signal modulation request according to the target modulation parameter and the three-phase voltage.

[0117] In a possible implementation of this embodiment, the signal modulation device determines the target modulation parameters corresponding to the three-phase voltages according to the first target phase voltage and the second target phase voltage in the three-phase voltages and the bus voltage, including:

[0118] Obtaining a first phase voltage, a second phase voltage and a third phase voltage among the three-phase voltages;

[0119] comparing the first phase voltage, the second phase voltage and the third phase voltage to obtain a first target phase voltage among the three-phase voltages and a second target phase voltage among the three-phase voltages;

[0120] calculating a phase voltage difference between the first target phase voltage and the second target phase voltage;

[0121] The target modulation parameters corresponding to the three-phase voltages are determined according to the phase voltage differences and the bus voltages.

[0122] In a possible implementation of this embodiment, the signal modulation device determines the target modulation parameter corresponding to the three-phase phase voltage according to the phase voltage difference and the bus voltage, including:

[0123] If the phase voltage difference is greater than the bus voltage, determining a voltage reduction amplitude coefficient according to the phase voltage difference and the bus voltage;

[0124] The three-phase voltages are uniformly reduced according to the voltage reduction amplitude coefficient to obtain updated three-phase voltages, wherein the updated three-phase voltages include a first updated phase voltage, a second updated phase voltage, a third updated phase voltage, a first target updated phase voltage, and a second target updated phase voltage;

[0125] The target modulation parameter corresponding to the updated three-phase phase voltage is calculated according to the first target updated phase voltage and the second target updated phase voltage.

[0126] In a possible implementation of this embodiment, the signal modulation device calculates the target modulation parameter corresponding to the updated three-phase phase voltage according to the first target updated phase voltage and the second target updated phase voltage, including:

[0127] Calculating the sum of the first target updated phase voltage and the second target updated phase voltage to obtain a first initial modulation parameter;

[0128] The product of the initial modulation parameter and the preset modulation coefficient is calculated to obtain the first target modulation parameter corresponding to the updated three-phase phase voltage.

[0129] In a possible implementation of this embodiment, the signal modulation device determines the target modulation parameter corresponding to the three-phase phase voltage according to the phase voltage difference and the bus voltage, including:

[0130] If the phase voltage difference is less than the bus voltage, then calculating the sum of the first target phase voltage and the second target phase voltage to obtain a second initial modulation parameter;

[0131] The product of the second initial modulation parameter and the preset modulation coefficient is calculated to obtain a second target modulation parameter corresponding to the three-phase voltage.

[0132] In a possible implementation of this embodiment, the signal modulation device generates a target control signal corresponding to the signal modulation request according to the target modulation parameter and the three-phase voltage, including:

[0133] Acquire a first target modulation parameter among the target modulation parameters, and an updated three-phase phase voltage corresponding to the three-phase phase voltage;

[0134] Injecting the first target modulation parameter into the updated three-phase voltage to obtain a first target modulation wave signal;

[0135] The target control signal corresponding to the signal modulation request is obtained by comparing the first target modulation wave signal with the high-frequency triangular carrier of the target carrier generator.

[0136] In a possible implementation of this embodiment, the signal modulation device generates a target control signal corresponding to the signal modulation request according to the target modulation parameter and the three-phase voltage, including:

[0137] Acquire a second target modulation parameter among the target modulation parameters;

[0138] Injecting the second target modulation parameter into the three-phase voltage to obtain a second target modulation wave signal;

[0139] The target control signal corresponding to the signal modulation request is obtained by comparing the second target modulation wave signal with the high-frequency triangular carrier of the target carrier generator.

[0140] In this embodiment, the signal modulation device obtains the three-phase voltage and bus voltage corresponding to the signal modulation request by responding to the signal modulation request; determines the target modulation parameters corresponding to the three-phase voltage according to the first target phase voltage and the second target phase voltage in the three-phase voltage, and the bus voltage; generates the target control signal corresponding to the signal modulation request according to the target modulation parameters and the three-phase voltage. By generating the corresponding modulation parameters according to the first target phase voltage and the second target phase voltage in the three-phase voltage, and the bus voltage, and injecting the modulation parameters into the saddle-shaped modulation wave signal in the three-phase voltage, and then converting it into the corresponding control signal, it is possible to achieve a control effect equivalent to that corresponding to space vector pulse width modulation, effectively reduce the calculation amount of signal modulation control, and improve the calculation accuracy of signal modulation control.

[0141] The embodiment of the present invention also provides a signal modulation device, such as Figure 6 As shown, Figure 6 A schematic diagram of the structure of an embodiment of a signal modulation device provided in an embodiment of the present application.

[0142] The signal modulation device integrates any one of the signal modulation devices provided in the embodiments of the present invention, and the signal modulation device includes:

[0143] one or more processors;

[0144] Memory; and

[0145] One or more applications, wherein the one or more applications are stored in the memory and are configured to be executed by the processor to perform the steps of the signal modulation method described in any of the above signal modulation method embodiments.

[0146] Specifically, the signal modulation device may include one or more processing core processors 401, one or more computer-readable storage media memories 402, a power supply 403, an input unit 404 and other components. Those skilled in the art will understand that Figure 6 The signal modulation device structure shown in the figure does not constitute a limitation on the signal modulation device, and may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0147] The processor 401 is the control center of the signal modulation device. It uses various interfaces and lines to connect various parts of the entire signal modulation device. By running or executing software programs and / or modules stored in the memory 402, and calling data stored in the memory 402, it performs various functions of the signal modulation device and processes data, thereby monitoring the signal modulation device as a whole. Optionally, the processor 401 may include one or more processing cores; preferably, the processor 401 may integrate an application processor and a modem processor, wherein the application processor mainly processes the operating system, user interface, and application programs, and the modem processor mainly processes wireless communications. It is understandable that the above-mentioned modem processor may not be integrated into the processor 401.

[0148] The memory 402 can be used to store software programs and modules. The processor 401 executes various functional applications and data processing by running the software programs and modules stored in the memory 402. The memory 402 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function (such as a sound playback function, an image playback function, etc.), etc.; the data storage area may store data created according to the use of the signal modulation device, etc. In addition, the memory 402 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other volatile solid-state storage devices. Accordingly, the memory 402 may also include a memory controller to provide the processor 401 with access to the memory 402.

[0149] The signal modulation device also includes a power supply 403 for supplying power to each component. Preferably, the power supply 403 can be logically connected to the processor 401 through a power management system, so as to manage charging, discharging, and power consumption through the power management system. The power supply 403 can also include any components such as one or more DC or AC power supplies, recharging systems, power failure detection circuits, power converters or inverters, and power status indicators.

[0150] The signal modulation device may further include an input unit 404, which may be used to receive input digital or character information and generate keyboard, mouse, joystick, optical or trackball signal input related to user settings and function control.

[0151] Although not shown, the signal modulation device may further include a display unit, etc., which will not be described in detail herein. Specifically in this embodiment, the processor 401 in the signal modulation device will load the executable files corresponding to the processes of one or more application programs into the memory 402 according to the following instructions, and the processor 401 will run the application programs stored in the memory 402, thereby realizing various functions, as follows:

[0152] In response to the signal modulation request, obtaining the three-phase voltage and bus voltage corresponding to the signal modulation request;

[0153] Determine a target modulation parameter corresponding to the three-phase voltage according to a first target phase voltage and a second target phase voltage in the three-phase voltage and the bus voltage;

[0154] A target control signal corresponding to the signal modulation request is generated according to the target modulation parameter and the three-phase voltage.

[0155] In this embodiment, the signal modulation device obtains the three-phase voltage and bus voltage corresponding to the signal modulation request by responding to the signal modulation request; determines the target modulation parameters corresponding to the three-phase voltage according to the first target phase voltage and the second target phase voltage in the three-phase voltage, and the bus voltage; generates the target control signal corresponding to the signal modulation request according to the target modulation parameters and the three-phase voltage. The corresponding modulation parameters are generated according to the first target phase voltage and the second target phase voltage in the three-phase voltage, and the bus voltage, and the modulation parameters are injected into the saddle-shaped modulation wave signal in the three-phase voltage, and then converted into the corresponding control signal, which can be equivalent to the control effect corresponding to the space vector pulse width modulation, and effectively reduce the calculation amount of the signal modulation control, and improve the calculation accuracy of the signal modulation control.

[0156] To this end, an embodiment of the present invention provides a computer-readable storage medium, which may include: a read-only memory (ROM), a random access memory (RAM), a disk or an optical disk, etc. A computer program is stored thereon, and the computer program is loaded by a processor to execute the steps in any signal modulation method provided in an embodiment of the present invention. For example, the computer program may be loaded by a processor to execute the following steps:

[0157] In response to the signal modulation request, obtaining the three-phase voltage and bus voltage corresponding to the signal modulation request;

[0158] Determine a target modulation parameter corresponding to the three-phase voltage according to a first target phase voltage and a second target phase voltage in the three-phase voltage and the bus voltage;

[0159] A target control signal corresponding to the signal modulation request is generated according to the target modulation parameter and the three-phase voltage.

[0160] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the detailed description of other embodiments above, and will not be repeated here.

[0161] In specific implementation, the above units or structures can be implemented as independent entities, or can be arbitrarily combined to be implemented as the same or several entities. The specific implementation of the above units or structures can refer to the previous method embodiments, which will not be repeated here.

[0162] The specific implementation of the above operations can be found in the previous embodiments, which will not be described in detail here.

[0163] The above is a detailed introduction to a signal modulation method provided in an embodiment of the present application. Specific embodiments are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A signal modulation method, characterized in that: The signal modulation method comprises: In response to the signal modulation request, obtaining the three-phase voltage and bus voltage corresponding to the signal modulation request; Determine a target modulation parameter corresponding to the three-phase voltage according to a first target phase voltage and a second target phase voltage in the three-phase voltage and the bus voltage; A target control signal corresponding to the signal modulation request is generated according to the target modulation parameter and the three-phase voltage.

2. The signal modulation method according to claim 1, characterized in that: The step of determining the target modulation parameters corresponding to the three-phase voltages according to the first target phase voltage and the second target phase voltage in the three-phase voltages and the bus voltage comprises: Obtaining a first phase voltage, a second phase voltage and a third phase voltage among the three-phase voltages; comparing the first phase voltage, the second phase voltage and the third phase voltage to obtain a first target phase voltage among the three-phase voltages and a second target phase voltage among the three-phase voltages; calculating a phase voltage difference between the first target phase voltage and the second target phase voltage; The target modulation parameters corresponding to the three-phase voltages are determined according to the phase voltage differences and the bus voltages.

3. The signal modulation method according to claim 2, characterized in that: The determining the target modulation parameter corresponding to the three-phase voltage according to the phase voltage difference and the bus voltage includes: If the phase voltage difference is greater than the bus voltage, determining a voltage reduction amplitude coefficient according to the phase voltage difference and the bus voltage; The three-phase voltages are uniformly reduced according to the voltage reduction amplitude coefficient to obtain updated three-phase voltages, wherein the updated three-phase voltages include a first updated phase voltage, a second updated phase voltage, a third updated phase voltage, a first target updated phase voltage, and a second target updated phase voltage; The target modulation parameter corresponding to the updated three-phase phase voltage is calculated according to the first target updated phase voltage and the second target updated phase voltage.

4. The signal modulation method according to claim 3, characterized in that: The target modulation parameters include first target modulation parameters; The calculating the target modulation parameter corresponding to the updated three-phase voltage according to the first target updated phase voltage and the second target updated phase voltage comprises: Calculating the sum of the first target updated phase voltage and the second target updated phase voltage to obtain a first initial modulation parameter; The product of the initial modulation parameter and the preset modulation coefficient is calculated to obtain the first target modulation parameter corresponding to the updated three-phase phase voltage.

5. The signal modulation method according to claim 2, characterized in that: The target modulation parameters also include second target modulation parameters; The determining the target modulation parameter corresponding to the three-phase voltage according to the phase voltage difference and the bus voltage includes: If the phase voltage difference is less than the bus voltage, then calculating the sum of the first target phase voltage and the second target phase voltage to obtain a second initial modulation parameter; The product of the second initial modulation parameter and the preset modulation coefficient is calculated to obtain a second target modulation parameter corresponding to the three-phase voltage.

6. The signal modulation method according to claim 1, characterized in that: The step of generating a target control signal corresponding to the signal modulation request according to the target modulation parameter and the three-phase voltage includes: Acquire a first target modulation parameter among the target modulation parameters, and an updated three-phase phase voltage corresponding to the three-phase phase voltage; Injecting the first target modulation parameter into the updated three-phase voltage to obtain a first target modulation wave signal; The target control signal corresponding to the signal modulation request is obtained by comparing the first target modulation wave signal with the high-frequency triangular carrier of the target carrier generator.

7. The signal modulation method according to claim 1, characterized in that: The step of generating a target control signal corresponding to the signal modulation request according to the target modulation parameter and the three-phase voltage includes: Acquire a second target modulation parameter among the target modulation parameters; Injecting the second target modulation parameter into the three-phase voltage to obtain a second target modulation wave signal; The target control signal corresponding to the signal modulation request is obtained by comparing the second target modulation wave signal with the high-frequency triangular carrier of the target carrier generator.

8. A signal modulation device, characterized in that: The signal modulation device comprises: A voltage acquisition module is configured to respond to a signal modulation request and obtain three-phase voltages and a bus voltage corresponding to the signal modulation request; A signal modulation module, configured to determine a target restriction strategy of the target upgrade platform according to the predicted traffic data and a preset bandwidth control threshold; The signal generating module is configured to generate a target control signal corresponding to the signal modulation request according to the target modulation parameter and the three-phase voltage.

9. A signal modulation device, characterized in that: The signal modulation device comprises: one or more processors; Memory; and One or more applications, wherein the one or more applications are stored in the memory and configured to be executed by the processor to implement the steps of the signal modulation method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: A computer program is stored thereon, and the computer program is loaded by a processor to execute the steps of the signal modulation method according to any one of claims 1 to 7.

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