WO2011017951A1 - Plate-forme d'elaboration pour commande numerique d'alimentation - Google Patents

Plate-forme d'elaboration pour commande numerique d'alimentation Download PDF

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Publication number
WO2011017951A1
WO2011017951A1 PCT/CN2010/072764 CN2010072764W WO2011017951A1 WO 2011017951 A1 WO2011017951 A1 WO 2011017951A1 CN 2010072764 W CN2010072764 W CN 2010072764W WO 2011017951 A1 WO2011017951 A1 WO 2011017951A1
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Prior art keywords
dsc
signal
platform
power
communication
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PCT/CN2010/072764
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English (en)
Chinese (zh)
Inventor
张南山
贺川
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中兴通讯股份有限公司
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Publication of WO2011017951A1 publication Critical patent/WO2011017951A1/fr

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26—Power supply means, e.g. regulation thereof

Definitions

  • the present invention relates to a development device for a digital power supply, and more particularly to a power digital control development platform.
  • CN200710195834.2 discloses a digital control device for a switching power supply with digital communication function, which realizes simple digital control of power supply and has parameter input function.
  • US20070291890 discloses a system-on-chip (SOC) type digital power control scheme that supports simple DC power digital control and provides a chip-level hardware foundation.
  • SOC system-on-chip
  • US20060215644 discloses a switching power supply control circuit scheme with data input, which can realize digital control of DC power supply and support simple data configuration management function.
  • US20060022852, and US20090013199 disclose a digital power controller solution integrated with a microcontroller, which is a chip that provides a digital power control development carrier in hardware form.
  • US20050134245 discloses a digital control scheme for a switching power supply with a mode generator, which uses a preset mode that has been solidified and stored, and the user selects a simple output drive control function.
  • Power products usually have industry standards in the same and similar applications, and their input and output characteristics have relatively uniform specifications, but the internal components of the power supply are developed and designed by the manufacturer to provide a series of products to meet There are many special customizations for power products for the special needs of different users.
  • the current state of the field of communication power supply is that the power supply of different specifications can be the same in most of the control components, and a small number of technologies need to be differentiated.
  • the above several patents are only technical improvements in a certain aspect of power control digitalization.
  • the solution provided is not scalable and versatile, and the platform is not developed and built to form a platform. Therefore, although the customization requirements are met, the development cost is high and the development cycle is long.
  • the processor-based integrated development platform has the following solutions:
  • CN200510122963 discloses a power electronic digital control platform based on embedded plus digital signal processing, which uses an ARM (a microprocessor company name) processor plus a digital signal processor (DSP) scheme. It provides a wide range of interfaces and modules, including the development of power products, but its structure is complex and costly.
  • ARM a microprocessor company name
  • DSP digital signal processor
  • CN200520078105 discloses a power universal digital control platform based on high-speed embedded digital signal processing.
  • the platform uses an ARM processor plus DSP solution, and provides a rich interface and module, which can be used for power product development, but its structure is complicated. And the cost is high.
  • JP 2008125316 discloses a digital AC-DC two-stage switching power supply, which uses a microcontroller to implement digital control of a power supply, including a power conversion topology and a signal sample. And the drive signal output constitutes an AC-DC power supply development platform, but it is limited to one type of application, and the solution using the microcontroller has the disadvantages of low performance and insufficient expandability.
  • the existing digital control power products or power development platforms still have the following disadvantages: low power digital control, poor performance, simple intelligent management functions, complex architecture, high cost, long development cycle, inconvenient use, and expansion. Sex is not strong.
  • the technical problem to be solved by the present invention is to provide a power digital control development platform capable of improving the degree and performance of power control digitalization.
  • the present invention provides a power digital control development platform, including a platform external interface, an input signal conditioning circuit, a power drive output circuit, a switch control output circuit, and a minimum system with a digital signal controller DSC as a core.
  • the external interface of the platform is respectively connected with the input signal conditioning circuit, the power driving output circuit and the switch control output circuit, and the external interface of the platform is set as: an interface for the input signal and the output signal of the development platform;
  • the input signal conditioning circuit is set as: The power analog signal and the switch signal of the external interface of the platform are respectively adapted and output to the minimum system with the DSC as the core;
  • the power drive output circuit is set as: the power tube switch outputting the minimum system operation output with the DSC as the core
  • the control signal is outputted to the external interface of the platform after the driving capability is adapted;
  • the switch control output circuit is configured to: adapt the plurality of switch control signals sent after the minimum system operation processing with the DSC as the core, and output to the platform externally
  • the minimum system setting with DSC as the core is as follows: DSC is the core processor as the carrier of embedded software during development, carrying the operating environment of embedded software, and calculating and outputting the power tube switch control signal according to the input signal.
  • the minimum system with DSC as the core includes an analog-to-digital converter and/or a pulse width modulation unit; the minimum system with DSC as the core is an operating environment set to carry embedded software as follows: DSC as the core processor, Controlling the built-in analog-to-digital converter and/or pulse width modulation unit to convert the power analog signal of the input signal conditioning circuit to the digital signal; and logically determining the digital signal to obtain the human-computer interaction command, the protection switch state, Set one or more of the status and other detection status.
  • the development platform further includes a memory and communication signal processing circuit, wherein: the memory is set to: save setting parameters of the development platform;
  • the communication signal processing circuit is respectively connected with the minimum system and memory with the DSC as the core, and the communication signal processing circuit is set as: the minimum system access memory with the DSC as the core;
  • the DSC-based minimum system is also set up to carry the operating environment of the embedded software by accessing the memory through the communication signal processing circuitry.
  • the input signal conditioning circuit comprises an analog signal conditioning unit and a switching signal conditioning unit, wherein: the analog signal conditioning unit is configured to: respectively attenuate, amplify, bias and limit the power supply analog signals including voltage and/or current One or more adaptations to become the smallest system digitally quantizable analog signal centered on the DSC; and the switching signal conditioning unit is configured to: include one or more of a key input, a protection switch, a jumper setting, and a detection state The switching signals are respectively adapted to one or more of shaping, electrical isolation, level shifting, and voltage limiting or current limiting protection, and become a digital signal that can be logically judged by a minimum system with DSC as the core.
  • the processed power tube switch control signal output by the power drive output circuit is a pulse signal in the form of pulse width modulation and/or pulse frequency modulation; and the switching control output circuit performs adaptation processing on the switch control signal including level conversion processing and / or drive capability adaptation processing.
  • the communication signal processing circuit is also connected to the external interface of the platform, and the memory is further configured to: access the power supply centralized monitoring module and/or other development platform by the platform external interface and the communication signal processing circuit by the development platform.
  • the communication signal processing circuit comprises a serial peripheral device interface SPI communication processing unit, wherein: the SPI communication processing unit is configured to: perform an aspect conversion on the SPI communication signal as an epitaxial channel of the SPI port of the smallest system with the DSC as the core Adaptation processing of electrical isolation and drive capabilities to access different memories and/or to interact with other development platforms;
  • the external interface of the platform is also connected to the SPI communication processing unit, and the external interface of the platform is also set as: an interface for the SPI communication signal of the development platform.
  • Communications signal processing circuit includes a serial communication interface (SCI) between the communication processing unit, a controller area network (CAN) communication processing unit and an integrated circuit (I 2 C) the communication processing unit of one or more, wherein:
  • the SCI communication processing unit is configured to perform an adaptation process including level conversion and electrical isolation on the SCI communication signal as an epitaxial channel of the SCI port of the smallest system with the DSC as the core, to be centrally monitored with other development platforms and/or power sources.
  • Module interaction information including level conversion and electrical isolation on the SCI communication signal as an epitaxial channel of the SCI port of the smallest system with the DSC as the core, to be centrally monitored with other development platforms and/or power sources.
  • the CAN communication processing unit is configured to: as an epitaxial channel of the CAN port of the minimum system with the DSC as the core, perform level conversion and electrical isolation adaptation processing on the CAN communication signal to integrate with other development platforms and/or power sources.
  • the monitoring module performs information interaction;
  • the I 2 C communication processing unit is configured to: perform level conversion and electrical isolation on the I 2 C communication signal as an I 2 C port epitaxial channel of the DSC-based minimum system Adapting processing to access different memories and/or interacting with the power centralized monitoring module;
  • the DSC-based minimum system is further configured to carry the operating environment of the embedded software by: and other control units And/or a power centralized monitoring module of the upper level performs information interaction;
  • the platform external interface is further one or more of the SCI communication processing unit, the CAN communication processing unit, and the I 2 C communication processing unit Connected, the external interface of the platform is also set as: SPI communication signal, SCI communication signal and I 2 C communication letter as development platform One or more interfaces in the
  • the minimum system with DSC as the core is also set as: After the development is completed, the embedded software is solidified, and combined as a control unit and a power conversion component to form a digital power supply device, the control unit controls the coordination work inside the digital power supply device through the communication signal processing circuit. And the memory is also set to: Save the product information of the digital power device.
  • the minimum system with DSC as the core is also set as: the control unit interacts with the control unit of other digital power supply devices, and/or receives the monitoring of the centralized power monitoring module.
  • the more integrated DSC with high-speed digital signal processing and high-efficiency logic processing, is beneficial to shorten product development cycles, reduce product development costs, and improve product stability.
  • the invention converts the analog control of the traditional power source into full digital control realized by the embedded software, and provides a plurality of peripheral control ports suitable for power supply control, including input and output ports and various types of strings necessary for switching power supply control.
  • the line communication interface is more scalable and suitable for the development of control components for a variety of power supplies.
  • the control strategy implemented in the form of software is more flexible, and some nonlinear control strategies that are difficult to implement by analog control can be realized, so that the control performance of the developed power product is better.
  • the invention In order to meet the differentiated needs of different users, it is only necessary to change the embedded software when the user's needs change, and there is no need to redesign the hardware of the power supply, so the power product customization development is more convenient, the cycle is shorter, and the cost is lower; After the digital signal processing of the power supply, it facilitates subsequent software operation processing and long-distance transmission of information, realizes richer intelligent monitoring and management, and even realizes networked remote monitoring and management functions. Compared with the control platform disclosed in the patents CN200510122963 and CN200520078105, the invention only needs one processor and develops a set of embedded software, so the architecture is simpler and the board space is small, thereby the product has strong stability and is easy to use. .
  • FIG. 1 is a schematic diagram showing the positional relationship of a power digital control development platform of the present invention in a power supply product
  • FIG. 2 is a schematic block diagram of an embodiment of a power digital control development platform shown in FIG. 1.
  • FIG. 3 is a block diagram showing a specific structure of an embodiment of a power digital control development platform of the present invention
  • FIG. 4 is a schematic diagram of a power digital control development platform of the present invention.
  • FIG. 5 is a block diagram showing an application example of a control component applied to a two-stage all-digital rectifier of the present invention
  • FIG. 6 is a block diagram showing an application example of a control component applied to an all-digital online uninterruptible power supply according to the present invention.
  • the power digital control development platform provided by the present invention is used as a carrier for software development, and after completion, it serves as a control component for the digital power source, and the relationship is as shown in FIG. 1 .
  • the power digital control development platform (abbreviated as development platform) 101 based on the present invention develops embedded software 103, and the running software 103 is downloaded and solidified on the development platform 101, and combined into a power digital control component (or control unit). A power supply unit is then formed with the power conversion unit 102.
  • FIG. 2 it is a schematic block diagram of the development platform 101 shown in FIG. 1.
  • the development platform includes a platform external interface, an input signal conditioning circuit, a power drive output unit, a communication signal processing circuit, and digital signal control.
  • the Digital Signal Controller is the core minimum system (referred to as the DSC minimum system) and the memory, wherein: the external interface of the platform is respectively connected with the input signal processing circuit, the output signal processing circuit and the communication signal processing circuit, and the external interface of the platform is set.
  • the interface for the external input and output signals of the development platform the input signal conditioning circuit is set to: respectively adapt and adjust the power analog signal and the switch signal from the external interface of the platform;
  • the input signal conditioning circuit includes an analog signal conditioning unit And a switching signal conditioning unit, wherein: the analog signal conditioning unit is configured to: attenuate, amplify, offset, and limit the one or more power analog signals, such as voltage, current, and temperature output from respective sensors of the power conversion component protection One or more conditioning.
  • the minimum DSC system may be a digital signal quantized analog.
  • the switching signal conditioning unit is configured to: perform a shaping, electrical isolation, level shifting, and voltage limiting respectively on the switching signals including one or more of the key input, the protection switch, the jumper setting, and other detection state output signals
  • One or more adaptive conditioning in the current limiting protection becomes a digital signal that the DSC minimum system can logically judge.
  • the power drive output circuit is set to: the power pipe issued after the DSC minimum system operation processing
  • the control signal is subjected to driving capability adaptation processing, and is output to the external interface of the platform, and is output to the power conversion component via the external interface of the platform; the power tube switch control signal is in the form of pulse width modulation (PWM) and/or pulse frequency modulation (PFM).
  • PWM pulse width modulation
  • PFM pulse frequency modulation
  • the switch control output circuit is configured to: after the DSC minimum system operation processing, the plurality of switch control signals are subjected to level conversion and/or drive capability adaptation processing and output to the external interface of the platform to control the thyristor on the power conversion component and/or Or the action of the relay.
  • the communication signal processing circuit is configured to: provide an epitaxial channel for each type of port of the DSC minimum system, and adapt the communication signals of the various ports to the external interface of the platform; the adaptation processing is level conversion, electrical isolation, and driving One or more of the treatments.
  • the communication signal includes: serial communication signals for transmitting information between different memories and/or different control units (ie, embedded software running code is solidified in a control unit combined with the development platform), in different power supply units
  • the control unit or the CAN communication signal for information transmission with the upper monitoring processing unit
  • the I 2 C communication signal for information transmission between different memories or with the upper monitoring unit.
  • DSC is the core component of the embedded software during the development period, which carries the operating environment of the entire power embedded software. After the development is completed, as the control core in the digital power supply product, the internal control is controlled through the communication interface. The unit coordinates and accepts the centralized monitoring and management of the external power monitoring unit.
  • the operating environment that carries the entire power embedded software refers to the DSC as the core processor and controls the built-in analog/digital converter (ADC).
  • the PWM unit converts the power analog signal of the analog signal conditioning unit to the digital signal; logically judges the switching signal of the switching signal conditioning unit to obtain the human-computer interaction command, the protection switch state, the setting state, and Other detection states; calculating an output power tube switch control signal and a plurality of switch control signals according to the input signal; and accessing the memory to perform information interaction with other control units and/or upper power centralized monitoring modules.
  • the memory is set to: As a non-volatile data storage medium, save the power system's specification settings and product information.
  • the power drive output unit and the switch control output unit can be combined in one power control output circuit.
  • FIG. 3 is a block diagram showing a specific structure of an embodiment of a development platform provided by the present invention.
  • the input signal processing circuit includes an analog signal conditioning unit 302 and a switching signal conditioning unit 303.
  • the output signal processing is performed.
  • the circuit includes a power tube drive output unit 304 and a switch control output unit 305.
  • the communication signal processing circuit includes a Serial Peripheral Interface (SPI) communication processing unit 306 and a Serial Communications Interface (SCI) communication processing.
  • SPI Serial Peripheral Interface
  • SCI Serial Communications Interface
  • the memory is the serial EEPROM 312 And a platform external interface 301 and a DSC minimum system 310 respectively connected to each unit; wherein: the analog signal and the digital signal in the external interface 301 of the platform are separately arranged, and the number of interface signals can be reduced according to product development requirements;
  • the conditioning unit 302 is configured to: The power analog signal from the external interface 201 of the platform that needs to be measured and related to the digital control is conditioned, attenuated, amplified, biased, and clipped, and then output to the DSC minimum system 310; the power analog signals such as voltage, current, temperature, etc.
  • the signals output by the sensors are input to the DSC minimum system 310 as digital detection processing for each detection parameter of the power source.
  • the switch signal conditioning unit 303 is configured to: after switching some of the switch signals from the platform external interface 301 through level adaptation conversion, signal shaping, electrical isolation, and voltage limiting current limiting protection, output to the DSC minimum system 310; Signals such as key input, protection switch, jumper setting, and other detection status outputs are used as digital signals that the DSC minimum system 310 can logically determine.
  • the power tube drive output unit 304 is configured to: output the pulse signal of the power tube switch control signal processed by the DSC minimum system 310 to the platform external interface 201;
  • the pulse signal is mainly a pulse signal in the form of Pulse Wide Modulation (PWM) and Pulse Frequency Modulation (PFM), and is outputted through the platform to the external interface 301.
  • the switch control output unit 305 is configured to: output a control signal sent by the DSC minimum system 310, perform level conversion and drive capability adaptation processing, and output the signal to the platform external interface 301; the signal after the control signal is processed as described above is mainly It is a level signal that can be used to control the operation of relays, thyristors, etc.
  • the SPI communication processing unit 306 is configured to: provide an epitaxial channel for the SPI port of the DSC minimum system 310, perform level conversion adaptation, electrical isolation, and drive amplification on the communication signal of the SPI port, and output to the platform external interface 301;
  • the communication signals of the SPI port are processed to transfer information between different control units or memory units.
  • the SCI communication processing unit 307 is configured to: provide an epitaxial channel for the SCI port of the DSC minimum system 310, perform level conversion adaptation (such as RS-232 or RS-485, etc.) on the communication signal of the SCI port, and perform electrical isolation processing, and output To the platform external interface 301; the communication signal of the SCI port is processed to transfer information between different control units or the upper monitoring processing unit.
  • level conversion adaptation such as RS-232 or RS-485, etc.
  • the CAN communication processing unit 308 is configured to: provide an epitaxial high-speed channel for the CAN port of the DSC minimum system 310, perform level conversion adaptation on the communication signal of the CAN port, complete conversion of the TTL level to the CAN communication differential signal, and perform electrical isolation processing.
  • the output to the platform external interface 301; the communication signal of the above CAN port is processed to implement a multi-master CAN bus communication network, and information is transmitted between different control units, power supply units or upper monitoring processing units.
  • the universal input/output unit 309 is configured to: provide an extended communication channel for the universal input and output port of the DSC minimum system 310; the universal input/output unit 309 can be configured as: an extended input or output port, if necessary, as a switch signal conditioning unit 303 and switch control Supplementation of output unit 305.
  • the DSC minimum system 310 is set to: DSC as a core component as a carrier of embedded software, Includes DSC and clock generation and reset control circuitry, built-in ADC and PWM power supply digital control modules and SPI, SCI, I 2 C and CAN 4 serial communication control modules; and the operation of the entire power supply embedded software surroundings;
  • the I 2 C communication processing unit 311 is configured to: provide an extended communication channel for the I 2 C port of the DSC minimum system 310; the above I 2 C port signal is used to implement multi-host bus type low rate communication, and monitor in different storage units or upper positions Transfer information between units.
  • the serial EEPROM 312 is configured as: a non-volatile data storage unit that provides specifications for setting parameters and product information for the power system; the EEPROM uses fewer interface lines, facilitates bus expansion, and low-cost serial EEPROM 0
  • FIG. 4 A specific application example of the embodiment of the development platform shown in FIG. 3 is shown in FIG. 4, and each unit shown in FIG. 3 is implemented by a specific circuit in FIG. 4, where: unit 401 is a connection device; unit 402 is 8 The circuit differential signal amplifying circuit has a DC bias; the unit 403 is an 8-way voltage limiting current limiting circuit, and the voltage dividing is divided by a resistor; the unit 404 is an 8-channel buffer driving current limiting circuit, and the buffer is 20 mA.
  • unit 405 is an 8-channel driving circuit, and a collector open circuit driving circuit
  • unit 406 is a 4-channel optical isolation circuit for use as an epitaxial channel of the SPI port of the DSC minimum system 410
  • the circuit photoelectric isolation circuit is used as an RS-232 level conversion circuit
  • the unit 408 is a 2-channel optical isolation circuit, and a high-speed photoelectric coupling device is used as a CAN bus transceiver;
  • Unit 409 is an 8-way bidirectional current limiting circuit, which is limited to 4mA resistors and is used as the DSC.
  • a 4 mA resistor current limit is used to provide an extended communication channel for the I 2 C port of the DSC minimum system 410; unit 412 is a serial EEPROM.
  • FIG. 5 An application example of a two-stage (ie, two-stage) rectifier for communication developed by the development platform of the present invention is shown in FIG. 5.
  • the development platform 501 based on the present invention performs software development, and the developed software running code is completed.
  • Loaded into the DSC combined with the hardware form of the development platform or optimized hardware form, as a digital control component, including pre-control for controlling the power factor correction (PFC) rectifier converter 504 a component 502 and a subsequent stage control component 503 for controlling a downstream DC-DC power converter 505; and in combination with a corresponding power conversion component, the power conversion component includes a pre-stage PFC rectifier converter 504 and thereafter Level DC-DC power converter 505; exchanges data information between the front and rear stages through the internal communication interface provided by the development platform 501 (such as the communication interface provided by the DSC minimum system in FIG.
  • PFC power factor correction
  • FIG. 6 An application example of a communication online double-conversion uninterruptible power supply developed by using the development platform of the present invention is shown in FIG. 6.
  • the software development is performed based on the development platform 601 of the present invention, and the developed software running code is loaded after completion.
  • the DSC in combination with the hardware form of the development platform or the optimized development hardware form, as a digital control unit, including a pre-rectification control unit 602 for controlling the pre-stage PFC rectifier converter 604 and for controlling the rear stage DC- a post-inverter control unit 603 of the AC power converter 605; and in combination with a corresponding power conversion unit, the power conversion unit includes a pre-stage PFC rectifier converter 604 and a post-stage DC-AC power converter 605;
  • the internal communication interface provided by the development platform 601 exchanges data information, thereby completing the development of the digital control of the entire uninterruptible power supply product.
  • the present invention utilizes a more integrated DSC, and thus has high-speed digital signal processing and high-efficiency logic processing capability, which is advantageous for shortening product development cycles, reducing product development costs, and improving product stability.
  • the invention converts the analog control of the traditional power source into full digital control realized by the embedded software, and provides a plurality of peripheral control ports suitable for power supply control, including input and output ports and various types of strings necessary for switching power supply control.
  • the line communication interface is more scalable and suitable for the development of control components for a variety of power supplies.
  • the control strategy implemented in the form of software is more flexible, and it is possible to implement some non-linear control strategies that are difficult to achieve by analog control, so that the control performance of the developed power products is better.

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Abstract

L'invention concerne une plate-forme d'élaboration (101) pour commande numérique d'alimentation, comprenant : une interface externe (201) de la plate-forme, configurée sous la forme d'au moins une interface pour les signaux d'entrée et les signaux de sortie de la plate-forme d'élaboration (101); un circuit de conditionnement de signaux d'entrée (202) configuré pour conditionner correctement les signaux analogiques d'alimentation et les signaux de commutation provenant de l'interface externe (201) de la plate-forme; un circuit de sortie d'entraînement d'alimentation (203) configuré pour traiter de façon adaptative la capacité d'entraînement des signaux de commande d'interrupteur d'alimentation émis en sortie par un système minimum DSC (210) et pour envoyer ensuite les signaux traités à l'interface externe (201) de la plate-forme; un circuit de sortie de commande d'interrupteur (204) configuré pour traiter de façon adaptative des signaux de commande de commutation multiples émis en sortie par le système minimum DSC (210) puis émettre en sortie les signaux traités vers l'interface externe (201) de la plate-forme; et le système minimum DSC (210) configuré pour utiliser un DSC comme processeur central contenant un logiciel intégré et l'environnement d'exécution du logiciel intégré pendant l'élaboration. La plate-forme d'élaboration (101) selon l'invention permet d'obtenir une commande numérique intégrale, une extensibilité élevée et de bonnes performances de commande.
PCT/CN2010/072764 2009-08-13 2010-05-14 Plate-forme d'elaboration pour commande numerique d'alimentation WO2011017951A1 (fr)

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JP2008125316A (ja) * 2006-11-15 2008-05-29 Omron Corp スイッチング電源装置
WO2008059471A1 (fr) * 2006-11-16 2008-05-22 University Of Limerick Dispositif de commande de puissance numérique
CN101630897A (zh) * 2009-08-13 2010-01-20 中兴通讯股份有限公司 一种电源数字化控制开发平台

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