CN216310556U

CN216310556U - Control device for converter

Info

Publication number: CN216310556U
Application number: CN202121516969.6U
Authority: CN
Inventors: 陈江彬; 易卫; 张明飞; 姜磊
Original assignee: Suzhou Jingwei Track Control Technology Co ltd; Jiangsu Jingwei Rail Traffic Equipment Co ltd
Current assignee: Jiangsu Jingwei Rail Traffic Equipment Co ltd
Priority date: 2021-07-05
Filing date: 2021-07-05
Publication date: 2022-04-15
Anticipated expiration: 2031-07-05

Abstract

The utility model discloses a control device for a converter, which comprises a mainboard, a core module and a plurality of extension modules, wherein the mainboard comprises a main board, a core module and a plurality of extension modules; the core module is integrated with control logic, the mainboard is integrated with a core module interface corresponding to the core module, the core module comprises a mainboard signal interface, and the core module is connected with the core module interface on the mainboard through the mainboard signal interface; the mainboard includes a plurality of signal processing units, a plurality of external interfaces and respectively with a plurality of extension module interfaces that a plurality of extension modules correspond, and each extension module in proper order via corresponding extension module interface, core module interface and mainboard signal interface with the core module carries out the interaction, each external interface via a corresponding signal processing unit, core module interface and mainboard signal interface with the core module is connected. The utility model can effectively solve the contradiction between the product generalization, reliability, safety and volume cost.

Description

Control device for converter

Technical Field

The utility model relates to the technical field of urban rail transit, in particular to a control device for a current transformer.

Background

With the rapid development of urban rail transit, a plurality of foreign technologies are introduced at home, rail transit converter technologies are studied vigorously, which are represented by a middle vehicle institute of continents and a large electric traction research and development center, but the most core control unit technology is still relatively lagged behind. The converter of the rail transit comprises a traction converter, an auxiliary inverter, a charger and the like, and has different characteristics aiming at rails, subways, intercity trains and different marshalls. The control unit is used as a core component of the converter, can realize multiple functions of signal acquisition, control, diagnosis and protection, communication, display and the like, is closely related to the scheme structure of the converter, and plays an important role in ensuring safe and reliable operation of the converter.

The traditional control unit is only suitable for one or a few converters with extremely high similarity. The controller has extremely high dependence on the converter, and the rail alternating current converter has various types, specifications and schemes, so that different control units are required to be developed according to different converters, the control units have various forms and versions, large development investment and large maintenance workload.

In addition, the conventional control unit does not have a safety function, and cannot gradually meet more and more safety requirements of modern rail transit unmanned driving and the like.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is to provide a control device for a converter, which has the advantages of strong universality, high safety and reliability, good expansibility, small volume and low cost, and aims to overcome the defects of the prior art.

The technical scheme adopted by the utility model for solving the technical problems is as follows: constructing a control device for a converter, which comprises a main board, a core module and a plurality of extension modules;

the core module is integrated with control logic for controlling the plurality of extension modules, the mainboard is integrated with a core module interface corresponding to the core module, the core module comprises a mainboard signal interface, and the core module is connected with the core module interface on the mainboard through the mainboard signal interface;

the mainboard includes a plurality of signal processing units, a plurality of external interfaces and respectively with a plurality of extension module interfaces that a plurality of extension modules correspond, and each extension module in proper order via corresponding extension module interface, core module interface and mainboard signal interface with the core module carries out the interaction, each external interface via a corresponding signal processing unit, core module interface and mainboard signal interface with the core module is connected.

As a further improvement of the present invention, the motherboard includes a power supply unit and a power supply interface, the power supply unit is connected to an external power supply through the power supply interface, and the power supply unit respectively supplies power to the core module, the expansion module, and the signal processing unit;

the mainboard still include by the fault protection unit of power supply unit power supply, the fault protection unit includes power failure protection circuit, power failure protection circuit with power supply unit connects, and power supply unit's input voltage surpasss the upper limit value or the lower limit value of settlement, and when core module, extension module and signal processing unit's supply voltage was excessive pressure or was undervoltage, the automatic shutdown was right core module, extension module and signal processing unit's power supply output.

As a further improvement of the present invention, the external interface includes a first PWM driving interface, the signal processing unit includes a first PWM driving unit, and the first PWM driving interface is connected to the core module interface via the first PWM driving unit;

the extension module comprises a PWM extension module, the extension module interface comprises a PWM extension interface, the PWM extension module comprises a second PWM driving unit and a second PWM driving interface connected with the second PWM driving unit, and when the PWM extension module is connected with the PWM extension interface, the second PWM driving unit is connected with the core module interface through the PWM extension interface;

the first PWM driving unit comprises a first PWM optical fiber driving circuit and a first optical fiber feedback circuit, the first PWM optical fiber driving circuit converts the electric signal from the core module into an optical signal and outputs the optical signal through the first PWM driving interface, and the first optical fiber feedback circuit converts the optical signal from the first PWM driving interface into an electric signal and sends the electric signal to the core module through a core module interface and a mainboard signal interface;

the second PWM driving unit comprises a second PWM optical fiber driving circuit and a second optical fiber feedback circuit, the second PWM optical fiber driving circuit converts the electric signal from the core module into an optical signal and outputs the optical signal through the second PWM driving interface, and the second optical fiber feedback circuit converts the optical signal from the second PWM driving interface into an electric signal and sends the electric signal to the core module through the core module interface and the mainboard signal interface.

As a further improvement of the present invention, the first PWM driving unit includes a first lockout circuit, and the second PWM driving unit includes a second lockout circuit;

the power failure protection circuit is respectively connected with the first PWM driving unit and the second PWM driving unit, and outputs a failure signal to the first blocking circuit and the second blocking circuit when the power supply voltage of the core module, the extension module and the signal processing unit is undervoltage;

the first locking circuit locks the output of the first PWM optical fiber driving circuit when receiving a fault signal from the core module or the power failure protection circuit; and the second locking circuit locks the output of the second PWM optical fiber driving circuit when receiving a fault signal from the core module or the power failure protection circuit.

As a further improvement of the present invention, the external interface includes a first digital output interface, the signal processing unit includes a first digital output unit, and the first digital output interface is connected to the core module interface via the first digital output unit;

the expansion module comprises a digital IO expansion module, the expansion module interface comprises an IO expansion interface, the digital IO expansion module comprises a second digital output unit and a second digital output interface connected with the second digital output unit, and when the digital IO expansion module is connected to the IO expansion interface, the second digital output unit is connected with the core module interface through the IO expansion interface;

the first digital output unit comprises a first isolation output and state feedback circuit, and outputs an output signal from the core module to a first controlled element through a first digital output interface after being isolated by the first isolation output and state feedback circuit, and feeds back the actual state of the first controlled element to the core module;

the second digital output unit comprises a second isolation output and state feedback circuit, and outputs the output signal from the core module to a second controlled element through a second digital output interface after isolating the output signal through the second isolation output and state feedback circuit, and feeds back the actual state of the second controlled element to the core module.

As a further improvement of the present invention, the external interface includes a first speed acquisition interface, the signal processing unit includes a first speed acquisition unit, and the first speed acquisition interface is connected to the core module interface via the first speed acquisition unit;

the extension module comprises a speed acquisition extension module, the extension module interface comprises a speed acquisition extension interface, the speed acquisition extension module comprises a second speed acquisition unit and a second speed acquisition interface connected with the second speed acquisition unit, and when the speed acquisition extension module is connected to the speed acquisition extension interface, the second speed acquisition unit is connected with the core module interface through the speed acquisition extension interface;

the first speed acquisition unit comprises a first two-channel isolation receiving circuit and acquires a speed feedback signal through the first two-channel isolation receiving circuit;

the second speed acquisition unit comprises a second two-channel isolation receiving circuit and acquires a speed feedback signal through the second two-channel isolation receiving circuit.

As a further improvement of the present invention, the external interface includes a first analog quantity acquisition interface, the signal processing module includes a first analog quantity acquisition unit, and the first analog quantity acquisition interface is connected to the core module interface via the first analog quantity acquisition unit;

the extension module comprises an analog quantity acquisition extension module, the extension module interface comprises an analog quantity acquisition extension interface, the analog quantity acquisition extension module comprises a second analog quantity acquisition unit and a second analog quantity acquisition interface connected with the second analog quantity acquisition unit, and when the analog quantity acquisition extension module is connected to the analog quantity acquisition extension interface, the second analog quantity acquisition unit is connected with the core module interface through the analog quantity acquisition extension interface;

the first analog quantity acquisition unit and the second analog quantity acquisition unit respectively receive sensor signals of the converter, and the sensor signals are sent to the core module for analog-digital conversion and control after signal conditioning, filtering, gain switching and amplitude limiting processing.

As a further improvement of the present invention, the fault protection unit includes an analog sampling fault protection circuit, and the analog sampling fault protection circuit is connected to the first analog quantity acquisition unit and the second analog quantity acquisition unit, respectively, and compares the analog quantities acquired by the first analog quantity acquisition unit and the second analog quantity acquisition unit with a preset protection point, and outputs a fault signal to the core module when the analog quantities exceed the range of the preset protection point.

As a further improvement of the present invention, the extension module includes an MVB communication module, the extension module interface includes an MVB communication interface, and the MVB communication module is plugged into the MVB communication interface and is connected to the core module interface via the MVB communication interface; and/or the presence of a gas in the gas,

the extension module comprises a traction cutting-off module, the extension module interface comprises a traction cutting-off interface, and the traction cutting-off module is inserted into the traction cutting-off interface and is connected with the core module interface through the traction cutting-off interface.

As a further improvement of the utility model, the core module comprises an ARM processor, a DSP, an FPGA, a core module power supply unit, a storage unit, a communication control unit and a mainboard signal interface, wherein the ARM processor and the DSP are respectively connected with the FPGA through parallel buses.

As a further improvement of the present invention, the core module and each expansion module main board are respectively integrated onto a plurality of sub circuit boards, and the plurality of sub circuit boards are respectively plugged onto the main board through the plug-in terminals.

As a further improvement of the present invention, the plurality of sub circuit boards are respectively parallel to the main board, and the plurality of sub circuit boards are not stacked.

In the control device provided by the utility model, a plurality of expansion interfaces are arranged on the main board, a plurality of sub-modules are arranged on the same PCB, and the plurality of sub-modules are connected with the corresponding expansion interfaces on the main board through the inter-plug terminals.

The control device for the converter has the following beneficial effects: the control device provided by the utility model effectively solves the contradiction between the product universalization, reliability, safety and volume cost through the reasonable design and integration of the main board and the sub-modules, and can cover the control of the current transformers with different specifications; the product has single shape and convenient maintenance and management, effectively controls the volume and the cost of the product while greatly reducing the development investment and the maintenance cost, and has strong practical value and economic benefit; the control device has the advantages of strong protection function, high reliability and excellent safety performance, meets the requirements of SIL2 safety function, and is convenient for intelligent modules and upgrading expansion.

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 embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts:

fig. 1 is a schematic block diagram of a control apparatus for a converter according to an embodiment of the present invention;

FIG. 2 is a block diagram of a core module according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a control device for a converter according to an embodiment of the present invention.

Detailed Description

To facilitate an understanding of the utility model, the utility model will now be described more fully with reference to the accompanying drawings. Exemplary embodiments of the utility model are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It is noted that "connected" or "connecting" does not include directly connecting two entities, but also indirectly connecting two entities through other entities with beneficial and improved effects. When an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

The terms including ordinal numbers such as "first", "second", and the like used in the present specification may be used to describe various components, but the components are not limited by the terms. These terms are used only for the purpose of distinguishing one constituent element from other constituent elements. For example, a first component may be named a second component, and similarly, a second component may also be named a first component, without departing from the scope of the present invention.

In order to better understand the technical solutions, the technical solutions will be described in detail below with reference to the drawings and the specific embodiments of the specification, and it should be understood that the embodiments and specific features of the embodiments of the present invention are detailed descriptions of the technical solutions of the present application, and are not limited to the technical solutions of the present application, and the technical features of the embodiments and examples of the present invention may be combined with each other without conflict.

Referring to fig. 1, a general block diagram of a control apparatus for a converter according to an embodiment of the present invention is provided. The control device includes a main board 10, a core module 20, and a plurality of expansion modules. The core module 20 integrates various control logics for controlling a plurality of expansion modules, the core module 20 includes a motherboard signal interface, accordingly, the motherboard 10 integrates a core module interface 1601 corresponding to the core module 20, and the core module 20 is connected to the core module interface 1601 on the motherboard 10 through the motherboard signal interface.

The main board 10 further includes a plurality of signal processing units, a plurality of external interfaces, and a plurality of expansion module interfaces respectively corresponding to the plurality of expansion modules, and each expansion module interacts with the core module 20 sequentially via the corresponding expansion module interface, core module interface, and main board signal interface, and each external interface is connected with the core module 20 sequentially via a corresponding signal processing unit, core module interface 1601, and main board signal interface.

For example, the signal processing unit may include one or more of the following: a first digital output unit 120, a communication interface unit 140, a first PWM (Pulse width modulation) driving unit 1501, a first speed acquisition unit 1502, a temperature acquisition unit 1503, a first analog quantity acquisition unit 1504, and an auxiliary unit 130; the external interface may include one or more of the following: a first digital output interface 1702 connected to the first digital output unit 120, a node address interface 1703 connected to the core module interface 1601, a first PWM driving interface 1705 connected to the first PWM driving unit 1501, a CAN (Controller Area Network) communication interface 1706, an ethernet communication interface 1707, an optical fiber communication interface 1709, a first speed acquisition interface 1700 connected to the first speed acquisition unit 1502, a temperature acquisition interface 170 connected to the temperature acquisition unit 1503, and a first analog acquisition unit 1504 connected to the first analog acquisition unit 1504; the expansion module may then include one or more of the following: an analog quantity acquisition expansion module 30, a PWM expansion module 40, an optical communication expansion interface module 50, a speed acquisition expansion module 60, a digital IO (Input Output) module 70, a traction removal module 80, and an MVB (Multifunction Vehicle Bus) communication module 90; the expansion module interface may then include one or more of the following: the system comprises a PWM expansion interface 1604, an IO expansion interface 1606, a speed acquisition expansion interface 1605, an analog acquisition expansion interface 1603, an MVB communication interface 1602 and a traction cutting interface 1607.

External devices (e.g., controlled devices, sensors, etc.) may be connected to the external interface or the extension module, and execute control instructions from the core module 20, or send feedback signals to the core module 20, etc. The core module 20 can interact with the extension module through the mainboard 10, so that different external devices can be connected through the extension module, the universality of the control device for the converter is effectively solved, and the control of the converter with different specifications is covered.

In one embodiment of the present invention, the motherboard 10 includes a power supply unit 110 and a power interface 1701, wherein the power supply unit 110 is connected to an external power source (e.g., a 24V dc power source) through the power interface 1701, and the power supply unit 110 supplies power to the core module 20, the plurality of expansion modules, and the plurality of signal processing units, respectively. For example, when the external power source connected to the power interface 1701 is a 24V dc power source, the power unit 110 may convert a voltage of ± 24V of the external power source into a voltage of ± 12V, and supply power to the first analog quantity acquisition unit 1504, the temperature acquisition unit 1503, and the like; the voltage of +/-24V of an external power supply is converted into a 5V power supply, and the power supply is used for supplying power to the communication interface unit 140, the first PWM driving unit 1501, the first speed acquisition unit 1502, the first analog quantity acquisition unit 1504, the auxiliary unit 130 and the chip set of the core module 20; converting the +/-24V voltage of an external power supply into +/-15V isolation voltage, and supplying power for a speed sensor and the like connected to an external interface; the voltage of the external power supply of ± 24V is converted into the isolation voltage of 10V, and the first digital output unit 120 and the like are supplied with power.

The main board 10 further includes a fault protection unit 1505 powered by the power supply unit 110, the fault protection unit 1505 includes a power fault protection circuit, and the power fault protection circuit is connected to the power supply unit 110. When the input voltage of the power supply unit 110 exceeds a set upper limit value or a set lower limit value and the power supply voltages of the core module 20, the expansion module and the signal processing unit are overvoltage or undervoltage, the power supply fault protection circuit automatically closes the power supply output of the core module 20, the expansion module and the signal processing unit. Specifically, the power failure protection circuit performs overvoltage detection on the converted 5V voltage and 12V voltage, and immediately blocks power output when overvoltage occurs to prevent a later-stage circuit from being damaged; and performing undervoltage detection on the converted 5V voltage, ± 12V voltage, 3.3V voltage, 1.2V voltage and the like, and immediately outputting a fault signal to the first PWM driving unit 1501, the PWM expansion module 40, the first digital output unit 120, the digital IO module 170 and a main control chip set of the core module 20 when undervoltage is detected, so as to block output and forcibly reset, thereby ensuring the reliability and safety of the system.

In one embodiment of the present invention, the external interface includes a first PWM driving interface 1705, the signal processing unit includes a first PWM driving unit 1501, and the first PWM driving interface 1705 is connected with the core module interface 1601 via the first PWM driving unit 1501; accordingly, the extension module includes the PWM extension module 40, the extension interface includes the PWM extension interface 1604, the PWM extension module 40 includes a second PWM driving unit and a second PWM driving interface connected with the second PWM driving unit, and when the PWM extension module 40 is connected to the PWM extension interface 1604, the second PWM driving unit is connected with the core module interface 1601 via the PWM extension interface.

The first PWM driving unit 1501 includes a first PWM fiber driving circuit and a first fiber feedback circuit, and converts the electrical signal from the core module 20 into an optical signal and outputs the optical signal through the first PWM driving interface 1705, and converts the optical signal from the first PWM driving interface 1705 (i.e. from an external device connected to the first PWM driving interface 1705) into an electrical signal and sends the electrical signal to the core module 20 through the core module interface 20 and the motherboard signal interface for processing. Similarly, the second PWM driving unit includes a second PWM optical fiber driving circuit and a second optical fiber feedback circuit, and the second PWM optical fiber driving circuit converts the electrical signal from the core module 20 into an optical signal and outputs the optical signal through the second PWM driving interface, and the second optical fiber feedback circuit converts the optical signal from the second PWM driving interface into an electrical signal and sends the electrical signal to the core module 20 through the core module interface 1601 and the motherboard signal interface for processing. In particular, the first PWM driving unit 1501 and the second PWM driving unit described above may include a plurality of (e.g., 6) PWM fiber driving circuits, a fiber feedback circuit, and a power supply circuit, respectively. Optionally, an optically or electrically driven interface may also be included.

In practical applications, the PWM expansion module 40 may be replaced by an optical communication expansion interface module 50, where the optical communication expansion interface module 50 includes a maximum 6-way high-speed optical fiber communication expansion circuit and interface, and a maximum full-duplex mode speed of 20M for external high-speed module expansion.

Further, the first PWM driving unit 1501 includes a first lockout circuit, and the second PWM driving unit includes a second lockout circuit. Correspondingly, the power failure protection circuit is connected to the first PWM driving unit 1501 and the second PWM driving unit, and the power failure protection circuit outputs a failure signal to the first blocking circuit and the second blocking circuit when the supply voltages of the core module, the expansion module, and the signal processing unit are overvoltage or undervoltage. The first lockout circuit blocks the output of the first PWM fiber drive circuit when receiving a fault signal from the core module 20 or the power failure protection circuit; the second lockout circuit blocks the output of the second PWM fiber driving circuit when receiving a fault signal from the core module 20 or the power failure protection circuit, thereby achieving the purpose of safety and reliability.

In one embodiment of the present invention, the external interface includes a first digital output interface 1702, the signal processing unit includes a first digital output unit 120, and the first digital output interface 1702 is connected with the core module interface 1601 via the first digital output unit 120, so that an external device connected to the first digital output interface 1702 can interact with the core module 20; accordingly, the extension module includes a digital IO extension module 70, the extension interface includes an IO extension interface 1606, the digital IO extension module 70 includes a second digital output unit and a second digital output interface connected to the second digital output unit, and when the digital IO extension module 70 is connected to the IO extension interface 1606, the second digital output unit is connected to the core module interface 20 via the IO extension interface 1606, so that an external device connected to the digital IO extension module 70 may interact with the core module 20.

Further, the first digital output unit 120 includes a first isolation output and state feedback circuit, and outputs the output signal from the core module 20 after being isolated by the first isolation output and state feedback circuit to the first controlled element (for example, a MOSFET connected to the first digital output interface 1702) via the first digital output unit, and feeds back the actual state of the first controlled element to the core module 20; the second digital output unit includes a second isolation output and state feedback circuit, and outputs the output signal from the core module 20 to a second controlled element (for example, a MOSFET connected to the second digital output interface) via the second digital output unit after being isolated by the second isolation output and state feedback circuit, and feeds back the actual state of the second controlled element to the core module 20.

In addition, the first digital output unit 120 and the second digital output unit may further include an overcurrent protection circuit and an overvoltage suppression circuit to improve safety. When the load is short-circuited or overloaded, the overcurrent protection circuit automatically cuts off the first controlled element and the second controlled element, and feeds short-circuit information or overload information back to the core module 20; when the output end is in overvoltage, the overvoltage suppression circuit is triggered, so that the circuit is not damaged.

In one embodiment of the present invention, the external interface includes a first speed acquisition interface 1700, the signal processing unit includes a first speed acquisition unit 1502, and the first speed acquisition interface 1700 is connected with the core module interface 20 via the first speed acquisition unit 1502, so that an external device (e.g., an encoder) connected to the first speed acquisition interface 1700 can interact with the core module 20; accordingly, the extension module includes a speed acquisition extension module 60, the extension interface includes a speed acquisition extension interface 1605, the speed acquisition extension module includes a second speed acquisition unit and a second speed acquisition interface connected with the second speed acquisition unit, and when the speed acquisition extension module 60 is connected to the speed acquisition extension interface 1605, the second speed acquisition unit is connected with the core module interface 1601 via the speed acquisition extension interface 1605, so that an external device (e.g., an encoder) connected to the second speed acquisition interface can interact with the core module 20.

Further, the first speed acquisition unit 1502 includes a first two-channel isolation receiving circuit, and obtains a speed feedback signal through the first two-channel isolation receiving circuit; the second speed acquisition unit comprises a second two-channel isolation receiving circuit and acquires a speed feedback signal through the second two-channel isolation receiving circuit. The first two-channel isolation receiving circuit and the second two-channel isolation receiving circuit support a collector, a bus and a differential input interface so as to meet the control requirements of different motors and converters. Specifically, the first speed acquisition unit 1502 and the second speed acquisition unit described above include two kinds selected from among a speed sensor receiving circuit supporting A, B differential pulse type, collector A, B differential pulse type, bus type, and a power supply circuit. Optionally, it may also include a resolver receiver circuit.

In practical applications, the speed acquisition extension interface 1605 may further be connected to an IO module, and receive a corresponding speed signal through the IO module.

In one embodiment of the present invention, the external interface includes a first analog quantity collecting interface 1704, the signal processing module includes a first analog quantity collecting unit 1504, and the first analog quantity collecting interface 1704 is connected with the core module interface 1601 via the first analog quantity collecting unit 1504, so that an external device (e.g., a sensor) connected to the first analog quantity collecting interface 1704 can interact with the core module 20; correspondingly, the extension module includes an analog quantity acquisition extension module 30, the extension interface includes an analog quantity acquisition extension interface 1603, the analog quantity acquisition extension module 30 includes a second analog quantity acquisition unit and a second analog quantity acquisition interface connected with the second analog quantity acquisition unit, and when the analog quantity acquisition extension module 30 is connected to the analog quantity acquisition extension interface 1603, the second analog quantity acquisition unit is connected with the core module interface 1601 via the analog quantity acquisition extension interface 1603, so that an external device (e.g., a sensor) connected to the second analog quantity acquisition interface can interact with the core module 20.

The first analog quantity acquisition unit 1504 and the second analog quantity acquisition unit respectively receive sensor signals of the converter, and send the sensor signals to the core module 20 for analog-to-digital conversion and control after signal conditioning, filtering, gain switching and amplitude limiting processing, that is, the first analog quantity acquisition unit 1504 and the second analog quantity acquisition unit respectively comprise circuits for signal conditioning, filtering, gain switching, amplitude limiting and the like. In particular, the first analog quantity acquisition unit 1504 and the second analog quantity acquisition unit may respectively include multiple (for example, 9, or more if necessary) analog quantity sampling circuits and power supply circuits with gain switching functions.

In practical application, the analog acquisition expansion interface 1603 may further be connected to an IO module, and receive a corresponding analog signal through the IO module.

Correspondingly, the fault protection unit 1505 includes an analog sampling fault protection circuit, and the analog sampling fault protection circuit is respectively connected to the first analog quantity acquisition unit 1504 and the second analog quantity acquisition unit, compares the analog quantities acquired by the first analog quantity acquisition unit 1504 and the second analog quantity acquisition unit with the preset protection point, and outputs a fault signal to the core module 20 when the analog quantities exceed the range of the preset protection point. Specifically, the analog sampling fault protection circuit includes a filter circuit, a hardware fault comparison circuit, a serial DA converter, a logic circuit, and the like, where the serial DA converter is used to implement setting of a preset protection point.

In an embodiment of the present invention, the signal processing unit includes a communication interface unit 140, the external interface includes a CAN communication interface 1706, an ethernet interface circuit 1707 and an MVB interface 1708, and the CAN communication interface 1706, the ethernet interface circuit 1707 and the MVB interface 1708 are respectively connected to the core module interface 1601 via the communication interface unit 140, wherein the communication interface unit 140 CAN convert signals from the communication interface 1706, the ethernet interface circuit 1707 and the MVB interface 1708 into electrical signals suitable for processing by the core module 20, and the communication interface unit 140 includes an associated interface protection circuit.

Accordingly, the extension module includes an MVB communication module 90, the extension interface includes an MVB communication interface 1602, and the MVB communication module 90 is plugged into the MVB communication interface 1602 and connected to the core module interface 1601 via the MVB communication interface 1602. The communication extension can be realized through the MVB communication module 90 and the MVB communication interface 1602.

In addition, the expansion module may further include a traction resection module 80, the expansion interface includes a traction resection interface 1607, and the traction resection module 80 is plugged into the traction resection interface 1607 and connected with the core module interface 1601 via the traction resection interface 1607. In particular, the above-mentioned traction cutting module 80 may include two independent input circuits with physical isolation function, which effectively cut off the power supply of the inverter IGBT driver board when the input cutting signal is valid.

In addition, the signal processing unit on the main board 10 may further include a temperature acquisition unit 1503, an auxiliary unit 130, and the like, and accordingly, the external interface includes the temperature acquisition interface 170. The temperature acquisition unit 1503 is connected with the temperature acquisition interface 170 and the core module interface 1601, respectively, and is configured to acquire a temperature signal. Specifically, the temperature acquisition unit 1503 contains NTC and TP100 circuits, and supports temperature sampling of the motor and temperature acquisition of the internal heat sink, the brake resistor, and the like of the converter. The auxiliary unit 130 is connected to the core module interface 1601, and includes a real-time clock circuit and a digital temperature sensing circuit, wherein the real-time clock communicates with the core module 20 through a serial bus for time synchronization, so as to achieve time synchronization with necessary failure information, information synchronization with superior vehicle control devices and other devices, and the like; the digital temperature sensing circuit is used for collecting the temperature around the printed board and realizing the indication and protection functions in an abnormal state.

As shown in fig. 2, the core module 20 according to the embodiment of the present invention is a block diagram of an architecture of the core module 20, where the core module 20 includes an ARM processor 210, a DSP (Digital Signal processing) 220, an FPGA (Field-Programmable Gate Array) 230, a core module power supply unit 240, a storage unit, a communication control unit, a motherboard Signal interface, and the like, where the ARM processor 210 and the DSP 220 are respectively connected to the FPGA 230 through a 16-bit parallel bus, and implement high-speed data interaction.

The ARM processor 210 is used for implementing a control function and a communication function, and is connected to the display interface 2101, the SPI interface 2102, the analog sampling interface 2103, the first CAN interface 2302, the power sampling interface 2105, and the first temperature sampling interface 2104 in the motherboard signal interface. The FPGA 230 is configured to implement fiber communication decoding, speed decoding, DIO interface and fault management functions, and transmit signals to the ARM processor 210, the DSP 220 and corresponding interfaces, and is connected to the MVB interface 2301, the second CAN interface 2201, the fiber expansion interface 2303, the speed interface 2304, the PWM interface 2305, the DIO interface 2306, the fault input/output interface 2307 and the address interface 2308 in the motherboard signal interface, and the FPGA 230 may have a dual-port RAM storage unit built therein, and transmit signals to the ARM processor 210/DSP 220 and corresponding interfaces. The DSP 220 is used for implementing motor control or inverter control, and is capable of receiving speed information transmitted from the FPGA 230, and is connected to the second temperature sampling interface 2202 and the USB interface 2203 in the motherboard signal interface.

The display interface 2101, the SPI interface 2102, the analog quantity sampling interface 2103, the first CAN interface 2302, the power supply sampling interface 2105, the first temperature sampling interface 2104, the MVB interface 2301, the second CAN interface 2201, the fiber expansion interface 2303, the speed interface 2304, the PWM interface 2305, the DIO interface 2306, the fault input output interface 2307, the address interface 2308, the second temperature sampling interface 2202, and the USB interface 2203 of the signal interfaces of the motherboard may be specifically integrated into one or more physical interfaces, and accordingly, the core module interface 1601 on the motherboard may also include corresponding one or more physical interfaces.

Further, the core module power supply unit 240 is used for converting the power from the motherboard 10 into the power required by the core module 20, and supplying power to various parts of the core module 20, and is connected to the core power interface 2401 in the motherboard signal interface. The power supply unit 110 converts a 5V power supply from the main board 10 into 3.3V, 1.2V, and 2.5V power supplies required by the core module 20 for supplying power to the chipset and the unit circuit. The core module power supply unit 240 has an under-voltage protection function, and forcibly resets the chipset when the voltage is lower than a design value, and outputs a fault signal to the main board 10 for blocking each output unit.

The storage unit comprises a parallel storage unit 2501 and a serial storage unit 2502, wherein the parallel storage unit 2501 is respectively connected to the ARM processor 210 and the DSP 220 through buses, and the serial storage unit 2502 is connected to the ARM processor 210 through an SPI bus.

The communication control unit includes an ethernet controller 260 and a PHY 270, is connected to the ARM processor 210 through a bus, and is connected to an ethernet interface 2601 in the motherboard signal interface.

As shown in fig. 3, in order to achieve the platform and have the advantage of volume cost, the core module 20 and each expansion module may be respectively integrated into a plurality of sub circuit boards 320, and the plurality of sub circuit boards 320 are respectively plugged into the expansion interface of the main board 10 through the plug-in terminals, so as to electrically connect the sub circuit boards 320 with the main board 10, that is, the expansion interface on the main board 10 also adopts the plug-in terminals. The main board 10 and the sub-board 320 may be fixed between the lower mounting plate 320 and the upper mounting plate 330 using screws.

In order to further reduce the size of the control device for the inverter, the sub-circuit boards 310 are respectively fixed on the main board 10 in a manner parallel to the main board 10, and the sub-circuit boards 310 are not overlapped. Specifically, the main board 10 is fastened to the lower mounting plate 320 by screws, each sub circuit board 310 is fastened to the upper surface of the main board 10 by nuts, and the upper mounting plate 330 is fastened to the nuts on the upper surface of the sub circuit board 310 by screws.

It should be noted that the logic unit formed by the ARM processor, the DSP, and the FPGA in the present invention is a known technology. The utility model designs a safe, reliable and universal core control framework, which comprises a main board, a core module and a plurality of sub-modules, and reasonably integrates and interacts through a flat type extension framework structure, thereby effectively solving the contradiction between the product universalization, reliability, safety and volume cost, and meeting the safety function requirement of SIL 2. Compared with the prior art, the utility model has the following beneficial effects:

1. the designed main board comprises a power supply unit, a digital output unit, a communication interface unit, a PWM (pulse-width modulation) driving unit, a speed acquisition unit, a temperature acquisition unit, an analog acquisition unit, a fault protection unit, an auxiliary unit, a plurality of external interface units and a plurality of internal interfaces; the external interface is used for being connected with an external signal, and the internal interface is used for being connected with each submodule.

2. The designed sub-modules comprise an analog sampling module, a PWM interface module, an optical communication expansion interface module, a speed sampling module, an IO module and a traction cutting module; the core module comprises an ARM processor, a DSP, an FPGA, a power supply unit, a storage unit, a communication control unit and a mainboard signal interface.

3. The designed universal flat type extension frame structure is characterized in that a main board is provided with a part of unit circuits and a plurality of extension interfaces, each interface is connected with a corresponding sub-module through mutual plug terminals, each mutual plug terminal can extend various sub-modules and can be expanded in a laminated mode when needed, and the universal flat type extension frame structure is easy to expand, integrate and install and good in maintainability.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the utility model as defined in the appended claims.

Claims

1. A control device for a converter is characterized by comprising a mainboard, a core module and a plurality of extension modules;

2. The control device for the converter according to claim 1, wherein the main board comprises a power supply unit and a power supply interface, the power supply unit is connected with an external power supply through the power supply interface, and the power supply unit respectively supplies power to the core module, the extension module and the signal processing unit;

3. The control apparatus for the converter according to claim 2, wherein the external interface comprises a first PWM driving interface, the signal processing unit comprises a first PWM driving unit, and the first PWM driving interface is connected with the core module interface via the first PWM driving unit;

4. The control apparatus for the converter according to claim 3, wherein the first PWM driving unit includes a first lockout circuit, and the second PWM driving unit includes a second lockout circuit;

5. The control apparatus for a converter according to claim 2, wherein the external interface comprises a first digital output interface, the signal processing unit comprises a first digital output unit, and the first digital output interface is connected with the core module interface via the first digital output unit;

6. The control device for the converter according to claim 2, wherein the external interface comprises a first speed acquisition interface, the signal processing unit comprises a first speed acquisition unit, and the first speed acquisition interface is connected with the core module interface via the first speed acquisition unit;

7. The control device for the converter according to claim 2, wherein the external interface comprises a first analog acquisition interface, the signal processing module comprises a first analog acquisition unit, and the first analog acquisition interface is connected with the core module interface via the first analog acquisition unit;

8. The control device for the converter according to claim 7, wherein the fault protection unit comprises an analog sampling fault protection circuit, and the analog sampling fault protection circuit is connected to the first analog quantity acquisition unit and the second analog quantity acquisition unit respectively, compares the analog quantities acquired by the first analog quantity acquisition unit and the second analog quantity acquisition unit with a preset protection point, and outputs a fault signal to the core module when the analog quantities exceed the range of the preset protection point.

9. The control device for the converter according to claim 2, wherein the extension module comprises an MVB communication module, the extension module interface comprises an MVB communication interface, and the MVB communication module is plugged into the MVB communication interface and connected to the core module interface via the MVB communication interface; and/or the presence of a gas in the gas,

10. The control device for the converter according to any one of claims 1 to 9, wherein the core module comprises an ARM processor, a DSP, an FPGA, a core module power supply unit, a storage unit, a communication control unit and a motherboard signal interface, wherein the ARM processor and the DSP are respectively connected to the FPGA through parallel buses.

11. The control device for the converter according to any one of claims 1 to 9, wherein the core module and each expansion module are integrated into a plurality of sub-circuit boards, respectively, which are plugged onto the main board through a mating terminal.

12. The control device for the inverter as claimed in claim 11, wherein the plurality of sub circuit boards are respectively parallel to the main board, and the plurality of sub circuit boards are not stacked.