CN112202381B - Drive control method, device, electric appliance and computer readable storage medium - Google Patents
Drive control method, device, electric appliance and computer readable storage medium Download PDFInfo
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- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
- H02P21/22—Current control, e.g. using a current control loop
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Abstract
The invention provides a drive control method, a drive control device, electric equipment and a computer readable storage medium. The drive control method comprises the following steps: acquiring a voltage vector sector of a current control period and a voltage vector sector of a previous control period of a drive control circuit; starting to time the vector action duration of the drive control circuit based on the fact that the voltage vector sector of the current control period is different from the voltage vector sector of the previous control period; and controlling the feedback current of the drive control circuit according to the vector action time length and the time length threshold value. The technical scheme provided by the invention can inhibit the distortion of the phase current during sector switching of the voltage vector, reduce the current harmonic wave, improve the operation efficiency of the motor, and effectively reduce the operation noise of the motor on the basis of simplifying a drive control circuit and not additionally increasing the control cost.
Description
Technical Field
The present invention relates to the field of electrical equipment technologies, and in particular, to a drive control method, a drive control device, an electrical equipment, and a computer-readable storage medium.
Background
With the increasing energy efficiency requirements on air conditioners, range hoods, blowers and other equipment and the increasing requirements of users on noise quality, the vector control frequency conversion technology is more and more widely applied. In the vector control frequency conversion technology, motor phase current acquisition is a key for realizing vector frequency conversion control, the traditional double-resistor or three-resistor sampling method can realize better motor current sampling, and single-resistor current sampling is increasingly applied in order to reduce extra cost brought by sampling resistors and inconsistency brought by different sampling resistors. The single-resistor/single-current sensor sampling technology realizes current reconstruction according to the current on-off state of the inverter by sampling bus current, and compared with double-resistor sampling or three-resistor sampling, extra voltage harmonic can be introduced, so that current harmonic is deteriorated, and further motor noise is deteriorated.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art or the related art.
To this end, a first aspect of the invention provides a drive control method.
A second aspect of the invention provides a drive control apparatus.
A third aspect of the invention provides an electrical appliance.
A fourth aspect of the invention provides a computer-readable storage medium.
In view of the above, the present invention provides a driving control method, which is applied to a driving control circuit, and includes: acquiring a voltage vector sector of a current control period and a voltage vector sector of a previous control period of a drive control circuit; starting to time the vector action duration of the drive control circuit based on the fact that the voltage vector sector of the current control period is different from the voltage vector sector of the previous control period; and controlling the feedback current of the drive control circuit according to the vector action time length and the time length threshold value.
According to the above driving control method provided by the present invention, the following additional features may be further provided:
in the above technical solution, further, the drive control circuit includes: a current observer; the step of controlling the feedback current of the drive control circuit according to the vector action duration and the duration threshold specifically comprises the following steps: acquiring the observed current of a current observer in the current control period; and taking the observed current of the current control period as a feedback current based on the fact that the vector action time length is less than or equal to the time length threshold value.
In any of the above technical solutions, further, the step of obtaining the observed current of the current observer in the current control period specifically includes: obtaining a phase current reconstructed by driving a control circuit current and an observed current of a previous control period of a current observer; determining an error scalar of the current observer according to the phase current and the observed current of the previous control period; determining the adjustment quantity of the current observer according to the error scalar; and determining the observed current of the current control period according to the regulating quantity.
In any of the above technical solutions, further, the step of controlling the feedback current of the driving control circuit according to the vector action duration and the duration threshold specifically includes: obtaining phase current reconstructed by current of a driving control circuit; and taking the phase current as a feedback current based on the fact that the vector action time length is larger than a time length threshold value.
In any of the above technical solutions, further, the adjustment amount includes a phase difference value of the driving control circuit or a bandwidth variation amount of the driving control circuit.
In any of the above technical solutions, further, the drive control circuit includes: a counter; before the step of controlling the feedback current of the drive control circuit according to the vector action time length and the time length threshold, the method further comprises the following steps: acquiring an initial value and a counting speed of a counter; controlling a counter to count down according to the counting speed and the initial value, and starting to record the counting duration; and counting down to be less than or equal to the numerical threshold value based on the initial value, and taking the counting time length as a time length threshold value.
In any of the above technical solutions, further, the step of obtaining an initial value of the counter specifically includes: acquiring the rotating speed of a motor; determining an initial value according to the rotating speed of the motor; wherein, the larger the rotating speed of the motor is, the smaller the time length threshold value is.
A second aspect of the present invention proposes a drive control device including: a drive control circuit; the motor is connected with the drive control circuit; a memory storing a computer program; and a processor connected to the drive control circuit and the memory, the processor executing the steps of the drive control method according to the first aspect when executing the computer program.
A third aspect of the present invention provides an electric apparatus including: a load; and the drive control device of the second aspect, the drive control device is connected with the load.
A fourth aspect of the present invention proposes a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the drive control method proposed in the first aspect.
In the technical scheme of the invention, when the motor is driven, the drive control circuit operates in a current closed-loop control mode, and the vector direction is continuously changed. And comparing the voltage vector sector of the current closed-loop control period with the voltage vector sector of the previous current closed-loop control period. If the voltage vector sector of the current closed-loop control period is different from the voltage vector sector of the previous current closed-loop control period, which indicates that the sector where the voltage vector is located changes, and at this time, the problem of phase current fluctuation caused by transition of six basic voltage vectors may exist, the vector action duration of the drive control circuit is started to be timed, that is, the operation duration of the drive control circuit after the sector is switched is also started. And comparing the magnitude relation between the vector action duration and the duration threshold, and controlling the feedback current of the drive control circuit according to the magnitude relation. Therefore, on the basis of current reconstruction by adopting a single resistor or a current sensor for sampling, recombination of current closed-loop control feedback current is realized, distortion of time phase current during sector switching of a voltage vector is effectively restrained, current harmonic is reduced, the running efficiency of the motor is improved, and the running noise of the motor can be effectively reduced on the basis of simplifying a drive control circuit and not additionally increasing the control cost.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 shows a flow chart of a drive control method of an embodiment of the present invention;
fig. 2 is a flowchart illustrating a driving control method according to still another embodiment of the present invention;
fig. 3 is a flowchart illustrating a driving control method according to still another embodiment of the present invention;
fig. 4 is a flowchart illustrating a driving control method according to still another embodiment of the present invention;
fig. 5 is a flowchart illustrating a driving control method according to still another embodiment of the present invention;
FIG. 6 is a flow chart illustrating a control method for single resistance sampling noise reduction according to an embodiment of the present invention;
fig. 7 shows a schematic block diagram of a drive control apparatus of an embodiment of the present invention;
FIG. 8 shows a schematic diagram of a current observer according to an embodiment of the invention;
FIG. 9 shows a schematic diagram of a control mechanism according to an embodiment of the present invention;
fig. 10 shows a schematic diagram of a control mechanism according to yet another embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative positional relationship between the components, the movement, and the like in a certain determination posture (as shown in the drawing), and if the determination posture is changed, the directional indicator is changed accordingly.
A drive control method of an electric device, a drive control apparatus, an electric device, and a computer-readable storage medium according to some embodiments of the present invention are described below with reference to fig. 1 to 10.
Example 1:
as shown in fig. 1, according to an embodiment of the first aspect of the present invention, the present invention proposes a drive control method including:
102, acquiring a voltage vector sector of a current control period and a voltage vector sector of a previous control period of a drive control circuit;
104, judging whether the voltage vector sector of the current control period is the same as the voltage vector sector of the previous control period, if so, entering a step 106, and if not, entering a step 108;
step 106, obtaining the phase current reconstructed by the current of the drive control circuit, and taking the phase current as a feedback current;
and step 110, controlling the feedback current of the drive control circuit according to the vector action time length and the time length threshold value.
In this embodiment, the drive control circuit operates in a current closed loop control mode with a continuous change in vector direction during motor drive. And comparing the voltage vector sector of the current closed-loop control period with the voltage vector sector of the previous current closed-loop control period. If the voltage vector sector of the current closed-loop control period is different from the voltage vector sector of the previous current closed-loop control period, which indicates that the sector where the voltage vector is located changes, and at this time, the problem of phase current fluctuation caused by transition of six basic voltage vectors may exist, the vector action duration of the drive control circuit is started to be timed, that is, the operation duration of the drive control circuit after the sector is switched is also started. And comparing the magnitude relation between the vector action duration and the duration threshold, and controlling the feedback current of the drive control circuit according to the magnitude relation. And if the voltage vector sector of the current closed-loop control period is the same as the voltage vector sector of the previous current closed-loop control period, namely the sector where the voltage vector is located is not switched, continuing to use the phase current reconstructed by the current of the drive control circuit as the feedback current. Therefore, on the basis of current reconstruction by adopting a single resistor or a current sensor for sampling, recombination of current closed-loop control feedback current is realized, distortion of time phase current during sector switching of a voltage vector is effectively restrained, current harmonic is reduced, the running efficiency of the motor is improved, and the running noise of the motor can be effectively reduced on the basis of simplifying a drive control circuit and not additionally increasing the control cost.
Specifically, the driving control circuit comprises an inverter, the inverter is connected into a high-voltage direct-current bus and a low-voltage direct-current bus of the driving control circuit, and the output end of the inverter is connected with the motor. The three-phase current can be reconstructed by connecting a single sampling resistor or a current sensor in series at the direct-current bus side of the drive control circuit, and the three-phase current finally returns to a power grid through the direct-current bus, so that the current at the direct-current bus side can accurately reflect the change of the three-phase current.
It should be noted that the current closed-loop control mode is to adjust the duty ratio of the inverter in the drive control circuit according to the change of the main inductive current. When the inverter performs Space voltage Vector Pulse Width Modulation (SVPWM), a three-phase symmetric motor stator during three-phase symmetric sine wave voltage power supply is taken as a reference standard, proper switching is performed through different switching modes of the three-phase inverter, so that a PWM wave (Pulse Width Modulation signal) is formed, and an accurate flux linkage circle is tracked by a formed actual flux linkage Vector. The three-phase full bridge of the three-phase inverter is three half bridges composed of six switching devices. The six switching device groups are combined (the signals of the upper half bridge and the lower half bridge of the same bridge arm are opposite) to have 8 safe switching states. Of these, 000 and 111 are zero vectors, and do not generate significant current in the motor drive. In addition, 6 switch states (100, 110, 101, 001, 010, 011) are six valid vectors, respectively. The 8 switch states divide the 360 degree voltage space into 60 degree sectors, and six sectors in total, and any vector in 360 degrees can be synthesized by using the six basic effective vectors and two zero vectors.
Example 2:
as shown in fig. 2, according to an embodiment of the present invention, there is provided a drive control method including:
step 202, obtaining a voltage vector sector of a current control period and a voltage vector sector of a previous control period of the drive control circuit;
step 206, obtaining the phase current reconstructed by the current of the driving control circuit, and taking the phase current as a feedback current;
and step 212, acquiring the observed current of the current observer in the current control period, and taking the observed current in the current control period as the feedback current.
In the embodiment, on the premise of not changing the amplitude and the phase of the voltage vector, the current reconstruction is performed according to the voltage vector, so that the problems of large harmonic content, torque ripple and the like are easily caused. Therefore, when the voltage vector sector of the current closed-loop control period is different from the voltage vector sector of the previous current closed-loop control period, namely after the sector where the voltage vector is located is changed, if the operation time length (vector action time length) of the drive control circuit after the sector is switched is less than or equal to a time length threshold value, the reconstructed current harmonic wave in the drive control circuit is larger, the observed current of the current observer in the current control period is used as the feedback current, so that the feedback current harmonic wave is reduced, the actual current harmonic wave caused by the feedback current harmonic wave is reduced, and the noise generated in the operation process of the motor is reduced. With the transition of the operation time of the drive control circuit after the sector switching, if the vector action time is longer than the time threshold, the phase current reconstructed by the current is used as the feedback current, so that the response speed of current closed-loop control is ensured, the stability of the drive control circuit is improved, and the energy supply requirement of the motor is met.
Specifically, the drive control circuit includes a current observer that observes an input current (phase current) of the drive control circuit and reduces an error scalar between the reconstructed phase current and an observed current output by the observer up to around a zero value.
Before the step of obtaining the phase current reconstructed by the current of the driving control circuit, the method further comprises the following steps: and performing current reconstruction according to the voltage vector to obtain the reconstructed phase current of the driving control circuit.
Example 3:
as shown in fig. 3, according to an embodiment of the present invention, there is provided a drive control method including:
step 306, obtaining the phase current reconstructed by the current of the driving control circuit, and taking the phase current as a feedback current;
and 318, determining the observed current of the current control period according to the regulating quantity, and taking the observed current of the current control period as the feedback current.
In this embodiment, an error scalar of the current observer is calculated to reflect the difference between the observed current and the phase current based on the phase current reconstructed by the drive control circuit current and the observed current detected in the previous control cycle. And calculating the adjustment quantity required by the current observer for overcoming the error according to the error scalar quantity, and calculating the observed current of the current control period according to the adjustment quantity. Therefore, the error scalar between the phase current and the observed current is reduced to be close to a zero value, the stability of the driving control circuit is improved, and the noise generated in the running process of the motor is further reduced.
Specifically, the step of calculating the error scalar of the current observer adopts the following formula:
wherein S iserrIs a scalar error, IA、IB、ICFor the phase current to be reconstructed for the current,
for the observed current of the preceding control cycle, T3-2The transformation matrix from a common static three-phase coordinate system a, b and c shafting to a two-phase static coordinate system alpha and beta shafting is adopted, and the superscript K is the transposition of the matrix.
Further, the adjustment amount includes a phase difference value Δ θ of the drive control circuiteOr the bandwidth variation amount Δ ω of the drive control circuitc。
The adjustment being a phase difference delta theta of the drive control circuiteAnd determining the observation current of the current control period according to the regulating quantity by adopting the following formula:
wherein the content of the first and second substances,
for the current controlThe observed current of the control cycle is,
based on angle
Transformation matrix from two-phase synchronous d, q rotating coordinate system to three-phase stationary coordinate system a, b, c axes system, and angle
ΔθeIs the phase difference value, thetaeIs the rotor position, Id *、Iq *And d-axis and q-axis current commands of two-phase synchronous d and q rotating coordinate systems are given.
The regulating quantity is the bandwidth variation quantity delta omega of the drive control circuitcAnd determining the observation current of the current control period according to the regulating quantity by adopting the following formula:
wherein the content of the first and second substances,
for the observed current of the current control cycle, T2-3(θe) Indicating a common base angle thetaeA transformation matrix from two-phase synchronous d, q rotating coordinate system to three-phase stationary coordinate system a, b, c axis system, and
Δωcfor the amount of bandwidth variation, Id *、Iq *The given values of d-axis and q-axis current instructions of a two-phase synchronous d and q rotating coordinate system are provided, and s is a Laplace operator.
Example 4:
as shown in fig. 4, according to an embodiment of the present invention, there is provided a drive control method including:
step 412, obtaining the phase current reconstructed by the current of the driving control circuit, and taking the phase current as a feedback current;
and step 416, controlling the feedback current of the drive control circuit according to the vector action time length and the time length threshold value.
In this embodiment, the counter is given an initial value and the count speed is set. And counting down according to the counting speed by taking the initial value as a basic value until the number of the counter after counting down is less than or equal to the number threshold, and taking the counting time length for counting down as a time length threshold. The time length threshold is reasonably set through the initial value, the counting speed and the noise of the counter, so that when the sector where the voltage vector of the drive control circuit is located is switched, the current harmonic content value can be effectively reduced, and the noise of the motor during operation is reduced.
For example, the initial value is set to 1, the counting speed is 1 for each current closed-loop control period, the numerical threshold is 0, and the duration threshold is one current closed-loop control period.
Specifically, the corresponding relation between the noise in the running process of the motor and the initial value and the counting speed of the counter is preset, and the initial value and the counting speed of the counter are reasonably set according to the noise requirement.
Example 5:
as shown in fig. 5, according to an embodiment of the present invention, there is provided a drive control method including:
502, acquiring the rotating speed of a motor and the counting speed of a drive control circuit counter;
step 510, obtaining a voltage vector sector of a current control period of the drive control circuit and a voltage vector sector of a previous control period;
step 514, obtaining the phase current reconstructed by the current of the driving control circuit, and taking the phase current as a feedback current;
and 518, controlling the feedback current of the driving control circuit according to the vector action time length and the time length threshold value.
Wherein, the larger the rotating speed of the motor is, the smaller the time length threshold value is.
In the embodiment, the time threshold value can be associated with the actual rotating speed of the motor through the initial value of the rotating speed calculation calculator of the motor, so that the operation time length of the drive control circuit after the sector is switched can be judged more accurately, the feedback current can be controlled accurately, the noise generated during the operation of the motor can be controlled, and the universality of the drive control circuit can be improved.
Specifically, the step of calculating the initial value according to the rotation speed of the motor adopts the following formula:
wherein, Counts is the initial value of the counter, nmaxIs the maximum value of the initial value during the operation of the drive control circuit, nminIs the minimum value of the initial value, omega, during the operation of the drive control circuiteIs the rotational speed, omega, of the motoremaxFor the speed of rotation, ω, of the motor with the initial value set to the minimum valueeminThe initial value is set as the rotating speed of the motor corresponding to the maximum value. It can be seen that the initial value of the counter is a function of the motor speed, i.e. as the speed increases, the initial value of the counter gradually decreases and is finally limited to a certain base value (n)maxOr nmin) And the situation that the initial value is too small to meet the counting reduction task is avoided by setting the basic value. Under the condition that the counting speed is not changed, the smaller the initial value is, the smaller the time length threshold value is, namely the rotation speed of the motor and the time length threshold value are in a negative correlation relationship, and the time length threshold value is reduced along with the increase of the rotation speed.
Example 6:
as shown in fig. 6, according to an embodiment of the present invention, a method for controlling single-resistor sampling noise reduction is provided, including:
and 606, adopting the feedback current of the current closed-loop control as the phase current value reconstructed by the single resistance current.
In the embodiment, the phase current reconstructed by the single-resistor sampling current is obtained, and the current observer is constructed according to the phase current reconstructed by the sampling current. And acquiring a sector where the voltage vector under the two-phase (alpha, beta) static coordinate system of the last control period is located and a sector where the voltage vector under the two-phase static coordinate system of the current control period is located, and judging whether the current sector changes. After the time threshold value after the sector changes is determined, if the motor operates in the time threshold value after the sector changes, the feedback current adopted by the current closed-loop control is the output value of the current observer. If the motor runs outside the time threshold after the sector changes, the feedback current adopted by the current closed-loop control is the phase current value reconstructed by single resistance sampling. Therefore, the current closed-loop control based on single resistance sampling is realized, and meanwhile, the control current harmonic is reduced, so that the running noise of the motor is reduced, and the system cost is reduced compared with that of double resistance sampling.
Further, as shown in fig. 8, the construction of the current observer includes the following steps: obtaining an observer input command (to the current I) and an observer output value (observed current) of a previous control cycle
). An observer input instruction and an observer output value are processed by an error processor 802 to generate an error scalar Serr. Scalar quantity of error SerrThe observer controller 804 generates the adjustment amount P. The adjustment amount P is fed to the control means 806 to generate an observer output value for the current control period.
The observer input instruction is a phase current value reconstructed by single resistance sampling, and the error scalar is processed by the error processor on the observer input instruction and the observer output value, and reflects the difference between the observer input instruction and the observer output value.
The error scalar may be expressed as:
wherein S iserrIs a scalar error, IA、IB、ICFor the phase current to be reconstructed for the current,
for the observed current of the preceding control cycle, T3-2The transformation matrix from a common static three-phase coordinate system a, b and c shafting to a two-phase static coordinate system alpha and beta shafting is adopted, and the superscript K is the transposition of the matrix.
Specifically, the adjustment amount includes a phase difference value Δ θ of the drive control circuiteOr the bandwidth variation amount Δ ω of the drive control circuitc。
As shown in FIG. 9, the inputs to the control mechanism include the phase difference Δ θeRotor position thetaeAnd synchronizing the current command set values I of the d and q rotating coordinate systemsd *、Iq *Then the observed current value of the output of the control mechanism is expressed as:
wherein the content of the first and second substances,
for the observed current of the current control cycle, T2-3(θe) Based on angle
Transformation matrix from two-phase synchronous d, q rotating coordinate system to three-phase stationary coordinate system a, b, c axes system, and angle
ΔθeIs the phase difference value, thetaeIs the rotor position, Id *、Iq *And d-axis and q-axis current commands of two-phase synchronous d and q rotating coordinate systems are given.
As shown in FIG. 10, the input to the control mechanism includes the amount of bandwidth change Δ ωcInitial bandwidth parameter ωcRotor position thetaeAnd synchronizing the current command set values I of the d and q rotating coordinate systemsd *、Iq *Then the output of the control mechanism is observedThe measured current values are expressed as:
wherein the content of the first and second substances,
for the observed current of the current control cycle, T2-3(θe) Indicating a common base angle thetaeA transformation matrix from two-phase synchronous d, q rotating coordinate system to three-phase stationary coordinate system a, b, c axis system, and
Δωcfor the amount of bandwidth variation, Id *、Iq *And d-axis and q-axis current instruction given values of a two-phase synchronous d and q rotating coordinate system are provided, and s is a Laplace-operator.
In addition, the time threshold may be a set value or inversely proportional to the motor speed. The counter initial value may be expressed by the following equation:
wherein, Counts is the counter initial value, nmaxMaximum value set for initial value of counter during operation, nminThe minimum value set for the counter during operation. OmegaeIs the current motor speed, omegaemaxMaximum speed of rotation, ω, with initial value of counter set to minimumeminThe minimum rotation speed at which the initial value of the counter is set to the maximum value is set.
Example 7:
as shown in fig. 7, according to an embodiment of the second aspect of the present invention, there is provided a drive control apparatus 700 including: a drive control circuit 702, a motor 704, a memory 706, and a processor 708.
In this embodiment, the motor 704 is connected to the drive control circuit 702. The memory 706 stores computer programs. The processor 708 is connected to the drive control circuit 702 and the memory 706, and the steps of the drive control method proposed by the first aspect are performed when the processor 708 executes the computer program. Therefore, the method has all the advantages of the driving control method provided by the first aspect, and is not described in detail.
Example 8:
according to an embodiment of the third aspect of the present invention, there is provided an electric appliance including a drive control device and a load connected to each other.
In detail, the drive control device can execute the following steps when executing the computer program: acquiring a voltage vector sector of a current control period and a voltage vector sector of a previous control period of a drive control circuit; starting to time the vector action duration of the drive control circuit based on the fact that the voltage vector sector of the current control period is different from the voltage vector sector of the previous control period; and controlling the feedback current of the drive control circuit according to the vector action time length and the time length threshold value.
In this embodiment, whether the sector in which the voltage vector is located changes is determined by comparing the voltage vector sector of the current closed-loop control period with the voltage vector sector of the previous current closed-loop control period. If the sector where the voltage vector is located is switched, timing the vector action duration of the drive control circuit, namely the operation duration of the drive control circuit after the sector is switched. And comparing the magnitude relation between the vector action duration and the duration threshold, and controlling the feedback current of the drive control circuit according to the magnitude relation. Therefore, the distortion of the phase current during sector switching of the voltage vector is restrained, the current fluctuation is reduced, the running efficiency of the motor is improved, and the running noise of the motor can be effectively reduced on the basis of simplifying a drive control circuit and not additionally increasing the control cost.
Specifically, the electrical devices include, but are not limited to, at least one of: air conditioner, refrigerator, smoke ventilator, washing machine, dryer and air-blower.
Example 9:
according to an embodiment of the fourth aspect of the present invention, a computer-readable storage medium is proposed, on which a computer program is stored, which computer program, when being executed by a processor, performs the steps of the drive control method proposed by the first aspect. Therefore, the method has all the advantages of the driving control method provided by the first aspect, and is not described in detail.
In the description herein, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance unless explicitly stated or limited otherwise; the terms "connected," "mounted," "secured," and the like are to be construed broadly and include, for example, fixed connections, removable connections, or integral connections; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (9)
1. A drive control method applied to a drive control circuit, comprising:
acquiring a voltage vector sector of the current control period and a voltage vector sector of the previous control period of the drive control circuit;
starting to time the vector action duration of the drive control circuit based on the fact that the voltage vector sector of the current control period is different from the voltage vector sector of the previous control period;
controlling the feedback current of the drive control circuit according to the vector action duration and the duration threshold;
the drive control circuit includes: a current observer; the step of controlling the feedback current of the drive control circuit according to the vector action duration and the duration threshold specifically includes:
acquiring the observed current of the current observer in the current control period;
and taking the observed current of the current control period as the feedback current based on the fact that the vector action time length is less than or equal to the time length threshold value.
2. The drive control method according to claim 1, wherein the step of acquiring the observed current of the current observer in the current control cycle specifically includes:
obtaining a phase current reconstructed by the drive control circuit current and an observed current of the current observer in the previous control period;
determining an error scalar of the current observer based on the phase current and the observed current of the previous control cycle;
determining an adjustment amount of the current observer according to the error scalar;
and determining the observed current of the current control period according to the regulating quantity.
3. The drive control method according to claim 2,
the adjustment amount includes a phase difference value of the drive control circuit or a bandwidth variation amount of the drive control circuit.
4. The drive control method according to claim 1, wherein the step of controlling the feedback current of the drive control circuit according to the vector action duration and the duration threshold specifically comprises:
obtaining the current reconstructed phase current of the drive control circuit;
and taking the phase current as the feedback current based on the fact that the vector action time length is larger than the time length threshold value.
5. The drive control method according to any one of claims 1 to 4, wherein the drive control circuit includes: a counter; before the step of controlling the feedback current of the drive control circuit according to the vector action duration and the duration threshold, the method further comprises the following steps:
acquiring an initial value and a counting speed of the counter;
controlling the counter to count down according to the counting speed and the initial value, and starting to record counting duration;
counting down to be less than or equal to a numerical threshold based on the initial value, and taking the counting time length as the time length threshold.
6. The drive control method according to claim 5, wherein the step of obtaining the initial value of the counter specifically includes:
acquiring the rotating speed of a motor;
determining the initial value according to the rotating speed of the motor;
wherein the greater the rotational speed of the motor, the smaller the duration threshold.
7. A drive control apparatus characterized by comprising:
a drive control circuit;
the motor is connected with the drive control circuit;
a memory storing a computer program;
a processor connected to the drive control circuit and the memory, the processor executing the computer program to perform the steps of the drive control method according to any one of claims 1 to 6.
8. An electrical device, comprising:
a load;
the drive control device of claim 7, connected to the load.
9. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the drive control method according to any one of claims 1 to 6.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101769953A (en) * | 2010-01-14 | 2010-07-07 | 东元总合科技（杭州）有限公司 | Phase current detection method of motor based on direct-current bus current |
| CN101917157A (en) * | 2010-07-29 | 2010-12-15 | 东元总合科技（杭州）有限公司 | Method for reconstructing phase current of electromotor |
| CN103765757A (en) * | 2012-08-15 | 2014-04-30 | 深圳市英威腾电气股份有限公司 | Phase current reconstruction method and apparatus |
| CN109672387A (en) * | 2017-10-13 | 2019-04-23 | 上海航天汽车机电股份有限公司 | Sector switch control method and system based on single resistance sampling motor control |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US6984953B2 (en) * | 2003-01-20 | 2006-01-10 | International Rectifier Corporation | Method and apparatus for reconstructing motor current from DC bus current |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101769953A (en) * | 2010-01-14 | 2010-07-07 | 东元总合科技（杭州）有限公司 | Phase current detection method of motor based on direct-current bus current |
| CN101917157A (en) * | 2010-07-29 | 2010-12-15 | 东元总合科技（杭州）有限公司 | Method for reconstructing phase current of electromotor |
| CN103765757A (en) * | 2012-08-15 | 2014-04-30 | 深圳市英威腾电气股份有限公司 | Phase current reconstruction method and apparatus |
| CN109672387A (en) * | 2017-10-13 | 2019-04-23 | 上海航天汽车机电股份有限公司 | Sector switch control method and system based on single resistance sampling motor control |
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