WO2023045555A1 - Procédé et appareil de reconstruction de courant triphasé, dispositif et support de stockage - Google Patents

Procédé et appareil de reconstruction de courant triphasé, dispositif et support de stockage Download PDF

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Publication number
WO2023045555A1
WO2023045555A1 PCT/CN2022/108615 CN2022108615W WO2023045555A1 WO 2023045555 A1 WO2023045555 A1 WO 2023045555A1 CN 2022108615 W CN2022108615 W CN 2022108615W WO 2023045555 A1 WO2023045555 A1 WO 2023045555A1
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WIPO (PCT)
Prior art keywords
current
phase
pwm cycle
duration
motor rotor
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PCT/CN2022/108615
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English (en)
Chinese (zh)
Inventor
刘文龙
赵鸣
黄招彬
龙谭
胡斌
曾贤杰
Original Assignee
佛山市顺德区美的电子科技有限公司
广东美的制冷设备有限公司
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Publication of WO2023045555A1 publication Critical patent/WO2023045555A1/fr

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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
    • 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
    • H02P21/13—Observer control, e.g. using Luenberger observers or Kalman filters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
    • H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
    • H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
    • H02P27/08—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters with pulse width modulation
    • H02P27/12—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters with pulse width modulation pulsing by guiding the flux vector, current vector or voltage vector on a circle or a closed curve, e.g. for direct torque control

Definitions

  • the present application relates to the technical field of motor control, and in particular to a three-phase current reconstruction method, device, equipment and storage medium.
  • an inverter air conditioner uses a permanent magnet synchronous motor (Permanent Magnetic Synchronous Machine, PMSM) with low loss and high efficiency.
  • PMSM Permanent Magnet Synchronous Machine
  • the three-phase bridge inverter of the frequency converter can be controlled by SVPWM (Space Vector Pulse Width Modulation, Space Vector Pulse Width Modulation).
  • SVPWM originates from the idea of AC motor stator flux linkage tracking, which is easy to realize by digital controller, and has the advantages of good output current waveform and high DC link voltage utilization rate.
  • the embodiments of the present application provide a three-phase current reconstruction method, device, device and storage medium, aiming at satisfying the three-phase current reconstruction under SVPWM control in the case of single current sensor acquisition.
  • the embodiment of the present application provides a three-phase current reconstruction method, including:
  • the unobservable area refers to that bus current values corresponding to two non-zero voltage vectors cannot be collected in the current PWM period.
  • the The method before the current vector amplitude of the current PWM cycle is determined based on the mechanical angle of the motor rotor, the rotational angular velocity, and the peak value of the current vector amplitude before entering the unobservable region, the The method also includes:
  • the rotational angular velocity of the motor rotor in the current PWM period is determined based on the electrical angular velocity of the motor rotor in the last PWM period.
  • the current vector amplitude of the current PWM cycle is determined based on the mechanical angle of the motor rotor of the current PWM cycle, the rotational angular velocity, and the peak value of the current vector amplitude before entering the unobservable region, using the following formula:
  • Im is the current vector amplitude of the current PWM cycle
  • Imax is the peak value of the current vector amplitude
  • ⁇ is the rotational angular velocity
  • t is the duration of the PWM cycle
  • ⁇ m is the mechanical angle of the motor rotor of the current PWM cycle .
  • the determining that the current PWM cycle enters an unobservable region based on the three-phase duty cycle includes:
  • the current PWM cycle enters an unobservable region based on the high-level duration of each phase line, the duration of the PWM cycle, and the minimum sampling duration of the bus current.
  • the determination that the current PWM cycle enters the unobservable region based on the high-level duration of each phase line, the duration of the PWM cycle, and the minimum sampling duration of the bus current includes one of the following:
  • the maximum phase is the phase with the largest duty ratio in the three-phase line
  • the minimum phase is the phase with the smallest duty cycle in the three-phase line
  • the intermediate phase is the phase with the duty cycle in the three-phase line. middle phase.
  • the embodiment of the present application provides a three-phase current reconstruction device, including:
  • the duty cycle calculation module is configured to calculate the three-phase duty cycle of the current PWM cycle based on the three-phase current value of the previous PWM cycle;
  • the first determination module is configured to determine that the current PWM cycle enters an unobservable region based on the three-phase duty ratio
  • the second determination module is configured to determine the current vector magnitude of the current PWM cycle based on the mechanical angle of the motor rotor, the rotational angular velocity, and the peak value of the current vector magnitude before entering the unobservable region;
  • the current reconstruction module is configured to reconstruct the three-phase current value of the current PWM cycle based on the current vector magnitude of the current PWM cycle and the electrical angle of the motor rotor;
  • the unobservable area refers to that bus current values corresponding to two non-zero voltage vectors cannot be collected in the current PWM period.
  • the three-phase current reconstruction device also includes:
  • a recording module configured to record a peak current vector magnitude
  • the conversion module is configured to determine the electrical angle of the motor rotor in the current PWM cycle based on the electrical angle of the motor rotor in the previous PWM cycle, the electrical angular velocity and the duration of the PWM cycle; the electrical angle of the motor rotor based on the current PWM cycle determining the mechanical angle of the motor rotor in the current PWM cycle; determining the rotational angular speed of the motor rotor in the current PWM cycle based on the electrical angular speed of the motor rotor in the last PWM cycle.
  • the second determination module adopts the following formula:
  • Im is the current vector amplitude of the current PWM cycle
  • Imax is the peak value of the current vector amplitude
  • ⁇ is the rotational angular velocity
  • t is the duration of the PWM cycle
  • ⁇ m is the mechanical angle of the motor rotor of the current PWM cycle .
  • the first determination module is specifically configured as:
  • the current PWM cycle enters an unobservable region based on the high-level duration of each phase line, the duration of the PWM cycle, and the minimum sampling duration of the bus current.
  • the first determination module determines that the current PWM cycle enters the unobservable region based on the high-level duration of each phase line, the duration of the PWM cycle, and the minimum sampling duration of the bus current, including one of the following :
  • the maximum phase is the phase with the largest duty ratio in the three-phase line
  • the minimum phase is the phase with the smallest duty cycle in the three-phase line
  • the intermediate phase is the phase with the duty cycle in the three-phase line. middle phase.
  • an embodiment of the present application provides a three-phase current reconstruction device, including: a processor and a memory configured to store a computer program that can run on the processor, wherein,
  • the processor is configured to execute the steps of the method described in the embodiments of the present application when running the computer program.
  • the three-phase current reconstruction device further includes: a bus current acquisition device configured to acquire a sampled value of the bus current and send the sampled value to the processor.
  • the embodiment of the present application provides a storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the method described in the embodiment of the present application are implemented.
  • the current PWM cycle is determined based on the mechanical angle, rotational angular velocity of the motor rotor of the current PWM cycle, and the peak value of the current vector amplitude before entering the unobservable area.
  • Current vector magnitude based on the current vector magnitude of the current PWM cycle and the electrical angle of the motor rotor, reconstruct the three-phase current value of the current PWM cycle.
  • FIG. 1 is a schematic structural diagram of a system applying a three-phase current reconstruction method according to an embodiment of the present application
  • Fig. 2 is the distribution diagram of space voltage vector
  • Figure 3 is a schematic diagram of the principle of the unobservable area of the space voltage vector in the embodiment of the present application.
  • FIG. 4 is a schematic diagram of a principle based on phase-shifting processing in the related art
  • FIG. 5 is a schematic flow diagram of a three-phase current reconstruction method according to an embodiment of the present application.
  • Fig. 6 is a schematic diagram of motor torque variation of a single-rotor compressor in an embodiment of the present application
  • Fig. 7 is a schematic diagram of the relationship between the carrier wave and the modulation in the motor control of the embodiment of the present application.
  • FIG. 8 is a schematic flow diagram of a three-phase current reconstruction method in an application example of the present application.
  • FIG. 9 is a schematic structural diagram of a three-phase current reconstruction device according to an embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of a three-phase current reconstruction device according to an embodiment of the present application.
  • the system includes: a motor M, a three-phase bridge inverter 101 , a DC power supply DC and a bus current acquisition device 102 .
  • a capacitor C1 is further connected between the positive pole and the negative pole of the direct current power supply DC.
  • the direct current supplied by the direct current power source DC is converted by the three-phase bridge inverter 101 into the three-phase power supply of the motor M, and the motor M may be a PMSM.
  • the three-phase bridge inverter 101 can be controlled by a frequency converter using SVPWM.
  • the bus current acquisition device 102 can adopt a typical single-resistor sampling circuit, for example, including a resistor R1 connected to the negative pole of the direct current power supply DC and the three-phase bridge inverter 101, and the voltage at both ends of the resistor R1 is calculated
  • the amplifier is transmitted to the AD conversion circuit, and the bus current is converted by the AD conversion circuit, and the bus current is used for subsequent reconstruction of the three-phase current, and then the reconstructed three-phase AC current is used as feedback to realize closed-loop control of the current.
  • the three-phase bridge inverter is controlled by SVPWM modulation, and has 8 switch working states, including 6 non-zero voltage vectors (V 1 -V 6 ) and 2 zero-voltage vectors (V 0 and V 7 ), which divides the voltage space plane into hexagons as shown in Figure 2.
  • the basic principle of phase current reconstruction is to use the bus current sampled at different times within a PWM cycle to obtain each phase current.
  • the relationship between the current of the DC bus and the three-phase current is determined by the state of the instantaneous switching value, and the relationship is shown in Table 1.
  • T min T d + T set + T AD , where T d represents up and down The length of the dead zone of the bridge arm, T set indicates the establishment time of the bus current, and T AD indicates the sampling conversion time.
  • the three-phase lines include: a-phase, b-phase and c-phase lines, and the sampling window of the original T1 is smaller than T min , and the high voltage of the b-phase will be processed by phase shifting. Shifting T shift to the right can make the sampling window of T1 equal to T min after phase shifting.
  • the unobservable area is an overmodulation area, for example, the area outside the inscribed circle of the hexagon shown in Figure 3, there will be a problem that the phase shift is shifted out of the PWM cycle and the effective vector voltage cannot be satisfied.
  • the sampling window cannot be provided, resulting in the inability to collect two-phase phase currents in one PWM cycle. Therefore, the related three-phase current reconstruction method based on phase-shift processing cannot meet the requirements of overmodulation. The reconstruction requirements of the three-phase current in the area.
  • a three-phase current reconstruction method capable of adapting to an overmodulation area is proposed, so that three-phase current reconstruction can be implemented based on the bus current in the overmodulation area.
  • the three-phase current reconstruction method of the embodiment of the present application includes:
  • Step 501 calculate the three-phase duty cycle of the current PWM cycle based on the three-phase current values of the previous PWM cycle.
  • the three-phase current values ia, ib, ic are obtained by clark (Clark) transformation and park (Parker) transformation to obtain id, iq, wherein, the clark transformation is used to transform the abc three-axis coordinate system into a stationary ⁇ coordinate system, The park transformation is used to transform the stationary ⁇ coordinate system into a rotating dq coordinate system, id is the current value of the converted d-axis, and iq is the current value of the converted q-axis;
  • Vd is the modulation voltage of the d-axis
  • Vq is the modulation voltage of the q-axis
  • Vd and Vq are subjected to inverse park transformation to obtain V ⁇ and V ⁇ , wherein V ⁇ is the modulation voltage of the ⁇ axis, and V ⁇ is the modulation voltage of the ⁇ axis;
  • Va, Vb, and Vc are obtained by SV vector calculation for V ⁇ and V ⁇ , wherein Va is the modulation voltage of the a-axis, Vb is the modulation voltage of the a-axis, and Vc is the modulation voltage of the a-axis;
  • step 502 it is determined that the current PWM period enters an unobservable region based on the three-phase duty cycle.
  • Step 503 Determine the current vector magnitude of the current PWM cycle based on the mechanical angle and rotational angular velocity of the motor rotor in the current PWM cycle and the peak value of the current vector magnitude before entering the unobservable region.
  • Step 504 Reconstruct the three-phase current values of the current PWM cycle based on the current vector magnitude of the current PWM cycle and the electrical angle of the motor rotor.
  • the unobservable area means that the bus current values corresponding to two non-zero voltage vectors cannot be collected in the current PWM cycle, that is, the currents of two phases and different phases cannot be sampled in one PWM cycle, resulting in the failure to complete the three-phase current PWM cycle. current reconstruction.
  • the current vector amplitude of the current PWM cycle is determined based on the mechanical angle, rotational angular velocity of the motor rotor of the current PWM cycle, and the peak value of the current vector amplitude before entering the unobservable area Value; based on the current vector magnitude of the current PWM cycle and the electrical angle of the motor rotor, reconstruct the three-phase current value of the current PWM cycle.
  • the method before determining the current vector magnitude of the current PWM cycle based on the mechanical angle of the motor rotor, the rotational angular velocity, and the peak value of the current vector magnitude before entering the unobservable region, the method further includes:
  • the rotational angular velocity of the motor rotor in the current PWM period is determined based on the electrical angular velocity of the motor rotor in the previous PWM period.
  • the motor is a motor of a single-rotor compressor. Since the single-rotor compressor works based on single-cycle compression, the torque of the motor has large fluctuations in a single rotation cycle, as shown in Figure 6 , the torque T is within the rotation period of 0-2 ⁇ , the minimum torque is T min , the maximum torque is T max , and the corresponding average torque is T avg .
  • the sine wave simulation method can be used to simulate the fluctuating state of the torque.
  • the peak value of the recorded current vector amplitude may be the maximum value of the detected current vector amplitude before the motor runs to an unobservable region.
  • the electrical angle of the motor rotor in the current PWM cycle can be determined based on the electrical angle of the motor rotor in the previous PWM cycle, the electrical angular velocity and the duration of the PWM cycle.
  • ⁇ e1 is the electrical angle of the previous PWM cycle
  • ⁇ e2 is the electrical angle of the current PWM cycle
  • Ts is the duration of the PWM cycle
  • Fs is the electrical angular velocity (also called the electrical frequency) of the previous PWM cycle.
  • the mechanical angle of the motor rotor in the current PWM cycle can be determined based on the electrical angle of the motor rotor in the current PWM cycle.
  • the electrical angular velocity of the motor rotor in the last PWM period can be used as the electrical angular velocity of the motor rotor in the current PWM period, and then the rotational angular velocity of the motor rotor in the current PWM period can be determined.
  • the current vector amplitude in the current PWM cycle is determined using the following formula:
  • Im is the current vector amplitude of the current PWM cycle
  • Imax is the peak value of the current vector amplitude
  • ⁇ is the rotational angular velocity
  • t is the duration of the PWM cycle
  • ⁇ m is the mechanical angle of the motor rotor in the current PWM cycle.
  • the mechanical angle ⁇ m is estimated and converted based on the electrical angle and electrical angular velocity of the previous PWM cycle, and the mechanical angle ⁇ m can be understood as the current rotational position of the motor rotor.
  • the current value of each phase of the current PWM cycle can be determined:
  • I m is the vector current amplitude
  • I a is the current value of phase a
  • I b is the current value of phase b
  • I c is the current value of phase c
  • ⁇ e is the electrical angle.
  • the current PWM three-phase current reconstruction in the unobservable area, the current PWM three-phase current reconstruction can be realized without collecting the bus current value of the current PWM period.
  • determining that the current PWM cycle enters an unobservable region based on the three-phase duty cycle includes:
  • the duration of the PWM cycle and the minimum sampling duration of the bus current it is determined that the current PWM cycle enters the unobservable region, including one of the following:
  • the largest phase is the phase with the largest duty ratio in the three-phase line
  • the smallest phase is the phase with the smallest duty ratio in the three-phase line
  • the middle phase is the phase with the duty ratio in the middle of the three-phase line.
  • the three-phase In the duty ratio there is a situation where the duty ratios of the two phases are both large; when the difference between the high-level duration of the largest phase and the high-level duration of the middle phase is greater than or equal to the minimum sampling duration and the high-level duration of the middle phase and the minimum When the high-level durations of the phases are less than the minimum sampling duration, the duty ratios of two phases among the three-phase duty ratios are smaller.
  • the difference between the high-level duration of the largest phase and the high-level duration of the intermediate phase is less than the minimum sampling duration and the difference between the duration of the PWM cycle and the high-level duration of the intermediate phase is greater than or equal to the minimum sampling duration, It can be based on the phase-shift processing of the intermediate phase, so that the two-phase phase current can be sampled in the PWM cycle, and the reconstruction of the three-phase current can be realized, and the reconstruction of the three-phase current can also be realized based on the method of the embodiment of the application. Examples are not limited to this.
  • the three-phase current reconstruction method may include:
  • Step 801 calculate the three-phase duty cycle and the size of the sampling window of the current PWM period.
  • the three-phase duty cycle of the current PWM cycle can be calculated based on the three-phase current values of the previous PWM cycle. For details, reference can be made to the foregoing description, which will not be repeated here.
  • Step 802 judge whether to enter the unobservable area, if not, execute step 803, then execute step 806, if yes, execute step 804 and step 805, then execute step 806;
  • the high-level duration of each phase line can be determined based on the three-phase duty cycle and the duration of the PWM cycle; and then the current Whether the PWM period enters the unobservable region.
  • step 803 the normal three-phase current is reconstructed, and the peak value of the current vector amplitude is recorded.
  • the two-phase current can be collected normally to obtain the three-phase current, and the peak value Imax of the current vector amplitude can be recorded.
  • Step 804 based on the mechanical angle of the motor rotor in the current PWM cycle, the rotational angular velocity, and the peak value of the current vector amplitude before entering the unobservable region, determine the current vector amplitude in the current PWM cycle.
  • the mechanical angle and rotational angular velocity of the motor rotor of the current PWM period can be determined based on the method of the embodiment of the present application, and then based on the mechanical angle, rotational angular velocity and the peak value of the current vector amplitude, determine For the current vector magnitude of the current PWM cycle, reference may be made to the foregoing description for details, and details will not be repeated here.
  • Step 805 Reconstruct the three-phase current values of the current PWM cycle based on the current vector amplitude of the current PWM cycle and the electrical angle of the motor rotor.
  • Step 806 vector control of the motor.
  • Motor vector operation control can be performed based on the three-phase current value of the current PWM cycle, for example, the motor can be controlled based on the SVPWM method.
  • the embodiment of the present application also provides a three-phase current reconstruction device, the three-phase current reconstruction device corresponds to the above-mentioned three-phase current reconstruction method, the above-mentioned three-phase current reconstruction method embodiment Each step in is also fully applicable to this embodiment of the three-phase current reconstruction device.
  • the three-phase current reconstruction device includes: a duty cycle calculation module 901 , a first determination module 902 , a second determination module 903 and a current reconstruction module 904 .
  • the duty cycle calculation module 901 is configured to calculate the three-phase duty cycle of the current PWM cycle based on the three-phase current values of the previous PWM cycle;
  • the first determination module 902 is configured to determine that the current PWM cycle enters the unobservable region based on the three-phase duty ratio;
  • the second determination module 903 is configured to determine the current vector magnitude of the current PWM cycle based on the mechanical angle of the motor rotor, the rotational angular velocity, and the peak value of the current vector magnitude before entering the unobservable region;
  • the current reconstruction module 904 is configured to reconstruct the three-phase current value of the current PWM cycle based on the current vector magnitude of the current PWM cycle and the electrical angle of the motor rotor;
  • the unobservable area refers to that the bus current values corresponding to two non-zero voltage vectors cannot be collected in the current PWM period.
  • the three-phase current reconstruction device also includes:
  • the recording module 905 is configured to record the peak value of the current vector magnitude
  • the conversion module 906 is configured to determine the electrical angle of the motor rotor in the current PWM cycle based on the electrical angle of the motor rotor in the previous PWM cycle, the electrical angular velocity, and the duration of the PWM cycle; determine the current PWM based on the electrical angle of the motor rotor in the current PWM cycle.
  • the mechanical angle of the motor rotor in the period; the rotational angular velocity of the motor rotor in the current PWM period is determined based on the electrical angular velocity of the motor rotor in the previous PWM period.
  • the second determination module 903 adopts the following formula:
  • Im is the current vector amplitude of the current PWM cycle
  • Imax is the peak value of the current vector amplitude
  • ⁇ is the rotational angular velocity
  • t is the duration of the PWM cycle
  • ⁇ m is the mechanical angle of the motor rotor in the current PWM cycle.
  • the first determination module 902 is specifically configured to:
  • the first determination module 902 determines that the current PWM cycle enters the unobservable region based on the high-level duration of each phase line, the duration of the PWM cycle, and the minimum sampling duration of the bus current, including one of the following:
  • the largest phase is the phase with the largest duty ratio in the three-phase line
  • the smallest phase is the phase with the smallest duty ratio in the three-phase line
  • the middle phase is the phase with the duty ratio in the middle of the three-phase line.
  • the duty cycle calculation module 901, the first determination module 902, the second determination module 903, the current reconstruction module 904, the recording module 905 and the conversion module 906 can be implemented by the processor of the three-phase current reconstruction device .
  • a processor needs to run a computer program in memory to carry out its functions.
  • the three-phase current reconstruction device provided in the above-mentioned embodiment performs three-phase current reconstruction
  • the division of the above-mentioned program modules is used as an example for illustration.
  • the above-mentioned processing can be allocated by Different program modules are completed, that is, the internal structure of the device is divided into different program modules to complete all or part of the processing described above.
  • the three-phase current reconfiguration device provided in the above embodiment and the three-phase current reconfiguration method embodiment belong to the same idea, and its specific implementation process is detailed in the method embodiment, and will not be repeated here.
  • FIG. 10 only shows an exemplary structure of the three-phase current reconfiguration device but not the entire structure, and some or all of the structures shown in FIG. 10 can be implemented as required.
  • the three-phase current reconstruction device 1000 provided by the embodiment of the present application includes: at least one processor 1001 , a memory 1002 and a user interface 1003 .
  • Various components in the three-phase current reconstruction device 1000 are coupled together through the bus system 1004 .
  • the bus system 1004 is used to realize connection and communication between these components.
  • the bus system 1004 also includes a power bus, a control bus and a status signal bus.
  • the various buses are labeled as bus system 1004 in FIG. 10 for clarity of illustration.
  • the three-phase current reconstruction device 1000 further includes: a bus current acquisition device configured to acquire a sampled value of the bus current and send the sampled value to the processor 1001 .
  • the bus current acquisition device may be a single-resistor sampling circuit as shown in FIG. 1 .
  • the user interface 1003 may include a display, a keyboard, a mouse, a trackball, a click wheel, keys, buttons, a touch panel or a touch screen, and the like.
  • the memory 1002 in the embodiment of the present application is used to store various types of data to support the operation of the three-phase current reconstruction device. Examples of such data include: any computer program for operation on a three-phase current reconstruction device.
  • the three-phase current reconstruction method disclosed in the embodiment of the present application may be applied to the processor 1001 or implemented by the processor 1001 .
  • the processor 1001 may be an integrated circuit chip with signal processing capabilities. During implementation, each step of the three-phase current reconfiguration method may be completed by an integrated logic circuit of hardware in the processor 1001 or instructions in the form of software.
  • the aforementioned processor 1001 may be a general-purpose processor, a digital signal processor (DSP, Digital Signal Processor), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and the like.
  • the processor 1001 may implement or execute various methods, steps, and logic block diagrams disclosed in the embodiments of the present application.
  • a general purpose processor may be a microprocessor or any conventional processor or the like.
  • the steps of the method disclosed in the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor.
  • the software module can be located in the storage medium, the storage medium is located in the memory 1002, the processor 1001 reads the information in the memory 1002, and combines its hardware to complete the steps of the three-phase current reconstruction method provided by the embodiment of the present application.
  • the three-phase current reconstruction device may be implemented by one or more Application Specific Integrated Circuits (ASIC, Application Specific Integrated Circuit), DSP, Programmable Logic Device (PLD, Programmable Logic Device), complex programmable logic Device (CPLD, Complex Programmable Logic Device), field programmable logic gate array (FPGA, Field Programmable Gate Array), general processor, controller, microcontroller (MCU, Micro Controller Unit), microprocessor (Microprocessor), Or implemented by other electronic components for performing the aforementioned method.
  • ASIC Application Specific Integrated Circuit
  • DSP Programmable Logic Device
  • PLD Programmable Logic Device
  • CPLD Complex Programmable Logic Device
  • FPGA Field Programmable Gate Array
  • general processor controller, microcontroller (MCU, Micro Controller Unit), microprocessor (Microprocessor), Or implemented by other electronic components for performing the aforementioned method.
  • MCU Microcontroller
  • Microprocessor Microprocessor
  • the memory 1002 may be a volatile memory or a non-volatile memory, and may also include both volatile and non-volatile memories.
  • the non-volatile memory can be read-only memory (ROM, Read Only Memory), programmable read-only memory (PROM, Programmable Read-Only Memory), erasable programmable read-only memory (EPROM, Erasable Programmable Read-Only Memory) Only Memory), Electrically Erasable Programmable Read-Only Memory (EEPROM, Electrically Erasable Programmable Read-Only Memory), Magnetic Random Access Memory (FRAM, ferromagnetic random access memory), Flash Memory (Flash Memory), Magnetic Surface Memory , CD, or CD-ROM (Compact Disc Read-Only Memory); magnetic surface storage can be disk storage or tape storage.
  • the volatile memory may be random access memory (RAM, Random Access Memory), which is used as an external cache.
  • RAM random access memory
  • RAM Random Access Memory
  • many forms of RAM are available, such as Static Random Access Memory (SRAM, Static Random Access Memory), Synchronous Static Random Access Memory (SSRAM, Synchronous Static Random Access Memory), Dynamic Random Access Memory Memory (DRAM, Dynamic Random Access Memory), synchronous dynamic random access memory (SDRAM, Synchronous Dynamic Random Access Memory), double data rate synchronous dynamic random access memory (DDRSDRAM, Double Data Rate Synchronous Dynamic Random Access Memory), enhanced Synchronous Dynamic Random Access Memory (ESDRAM, Enhanced Synchronous Dynamic Random Access Memory), Synchronous Link Dynamic Random Access Memory (SLDRAM, SyncLink Dynamic Random Access Memory), Direct Memory Bus Random Access Memory (DRRAM, Direct Rambus Random Access Memory ).
  • SRAM Static Random Access Memory
  • SSRAM Synchronous Static Random Access Memory
  • DRAM Dynamic Random Access Memory
  • SDRAM Synchronous Dynamic Random Access Memory
  • the embodiment of the present application also provides a storage medium, that is, a computer storage medium, specifically, it may be a computer-readable storage medium, for example, including a memory 1002 storing a computer program.
  • the processor 1001 of the structural device is executed to complete the steps of the method in the embodiment of the present application.
  • the computer-readable storage medium may be memory such as ROM, PROM, EPROM, EEPROM, Flash Memory, magnetic surface memory, optical disc, or CD-ROM.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Ac Motors In General (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

La présente demande concerne un procédé et un appareil de reconstruction de courant triphasé, un dispositif et un support de stockage. Le procédé comprend les étapes consistant : à calculer un rapport cyclique triphasé d'un cycle PWM actuel sur la base d'une valeur de courant triphasé d'un cycle PWM précédent ; sur la base du cycle de service triphasé, à déterminer que le cycle PWM actuel entre dans une région non observable ; sur la base de l'angle mécanique d'un rotor de moteur du cycle PWM actuel, la vitesse angulaire de rotation et la valeur de pic d'une amplitude de vecteur de courant avant d'entrer dans la région non observable, à déterminer une amplitude de vecteur de courant du cycle PWM actuel ; et sur la base de l'amplitude de vecteur de courant du cycle PWM actuel et de l'angle électrique du rotor de moteur, à reconstruire une valeur de courant triphasé du cycle PWM actuel.
PCT/CN2022/108615 2021-09-27 2022-07-28 Procédé et appareil de reconstruction de courant triphasé, dispositif et support de stockage WO2023045555A1 (fr)

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CN115313940B (zh) * 2022-08-19 2023-12-19 重庆海控科技合伙企业(有限合伙) 一种用于伺服电机的电流估计器

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