WO2020119378A1 - 一种带屏蔽的多功能供电及驱动装置 - Google Patents

一种带屏蔽的多功能供电及驱动装置 Download PDF

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Publication number
WO2020119378A1
WO2020119378A1 PCT/CN2019/118620 CN2019118620W WO2020119378A1 WO 2020119378 A1 WO2020119378 A1 WO 2020119378A1 CN 2019118620 W CN2019118620 W CN 2019118620W WO 2020119378 A1 WO2020119378 A1 WO 2020119378A1
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Prior art keywords
power supply
side plate
shielding
plate
igbt
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PCT/CN2019/118620
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English (en)
French (fr)
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柴媛
裴冰
王彬
杨春宇
关国华
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中车永济电机有限公司
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Publication of WO2020119378A1 publication Critical patent/WO2020119378A1/zh

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
    • H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
    • H02M1/092—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices the control signals being transmitted optically
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating

Definitions

  • the invention relates to a drive unit of a power module, in particular to a multifunctional power supply and drive device with shielding.
  • the low-voltage signal and control signal of the module are transmitted by electrical signals, and the circuit reliability is poor; using a single cable to connect a single wire is relatively poor in anti-interference, thereby affecting the reliability of the entire circuit.
  • the power module and the converter cabinet need to consider the problems of electrical clearance, creepage distance, electromagnetic interference, etc., which greatly increases the complexity of the structure design of the converter cabinet and also brings power module maintenance and maintenance. inconvenient.
  • the start and stop of the power supply equipment will affect the electrical signal.
  • high output power and high ambient temperature will affect the service life of the cable.
  • the low-voltage control device of the power module is installed externally without separate shielding and isolation.
  • the invention designs a shielded multifunctional power supply and drive device, which is applied to a high-power permanent magnet power module, which is mainly used to receive the control signal of the TCU, and isolate and convert the received electrical signal with low voltage power supply, and at the same time
  • the driving electrical signal is converted into an optical signal and transmitted to the IGBT.
  • the design of the present invention relies on a high-power permanent magnet power module, and a multi-functional conversion device with a shielded shell is designed. Starting from the actual application requirements of the power module, not only the realization of signal reception and conversion functions but also the entire signal transmission must be considered And the reliability of the conversion, but also consider the maintainability of the installation of the entire device, so the design of the multi-function conversion device is strict, which solves the following problems: 1) The low-voltage signal receiving and conversion device has a metal shielding shell, which is resistant to electromagnetic interference Stronger, improve the reliability of signal transmission and power module; 2) Large transmission capacity, high reliability, good electromagnetic compatibility, IGBT drive signal adopts photoelectric technology, and the converted electrical signal is sent in the form of optical signal to make it difficult The electromagnetic interference from the surrounding environment improves the reliability, accuracy and transmission distance of the system. A unified optimized circuit is used for the power signal to ensure the reliable transmission of the signal in a high-voltage interference environment; 3) The entire device has high integration and small size. The integrated installation of the drive
  • a multi-functional power supply and drive device with shielding including a metal shielding isolation frame, the shielding isolation frame is provided with input interfaces and outlet holes, and the shielding isolation frame is distributed with heat radiation and ventilation Hole, shielded isolation frame is equipped with isolated power supply, photoelectric conversion unit and driver.
  • the electrical signal of the external TCU is transmitted through the input interface and the integrated wiring harness with shield.
  • the photoelectric conversion unit receives the electrical drive signal transmitted by the TCU and converts it from electric to optical drive Signal
  • the IGBT driver receives the optical drive signal to control the turning on and off of the IGBT. At the same time, the driver feeds back the state of the IGBT to the photoelectric conversion unit through the optical signal.
  • the photoelectric conversion unit converts it into an electrical signal and feeds it back to the TCU. powered by.
  • the shielding isolation frame includes a bottom plate, a cover plate, an upper side plate, a lower side plate, a left side plate and a right side plate, the heat dissipation and ventilation holes are provided on the side plate, and the input interface It is arranged on the upper side plate, and the outlet hole is arranged on the bottom plate.
  • the above-mentioned shielded multifunctional power supply and driving device also includes a connecting side plate, the upper side plate is a straight plate with two ears, a handle is provided between the two ears, and the input interface is provided on the upper side plate Side; the right side panel is a convex side panel; the lower side panel is two side panels with ears, with a handle between the two ears; the left side panel is an L-shaped side panel with ears, A handle is installed between the ear and the end of the L-shaped side plate; the connecting side plate is a straight metal plate connecting the upper side plate and the left side plate, the name plate of the device is installed on the connecting side plate, and the internal threaded cylinder is welded on the bottom plate In order to facilitate the installation of the device, the side plates, bottom plate and cover plate described above constitute the shielding isolation frame.
  • the isolated power supply uses a transformer to achieve the isolation of the primary and secondary sides of each power supply.
  • the drive power supply unit isolated power supply, photoelectric conversion unit and driver located in the middle in the shielded isolation frame is combined on the bottom plate after the combination of the metal bracket, the insulating plate and the isolation pad column
  • the drive power supply unit on the side is directly installed on the side plate through the insulating plate, the insulating plate and the isolation pad column, and all the wire harnesses in the device are bound by the wire binding frame.
  • the whole device has high integration and small size, and the drive circuit system of multiple IGBT devices is integrated and installed, which is more convenient for maintenance.
  • FIGS 1 and 3 are schematic diagrams of the present invention.
  • the invention relies on the power module project of a high-power permanent magnet electric locomotive, and introduces the device scheme and basic principle of a shielded multifunctional power supply and drive device design scheme of the power module as a specific case to form a power module unit.
  • the main functions include the main Circuit connection, device switch control and heat dissipation.
  • the main function of the multi-function power supply drive device is to receive the control signal given by the converter TCU, process the signal and output it to the driver of the inverter power module IGBT, and to the IGBT
  • the driver supplies power and feeds back the received IGBT status signal to the unit, and then transmits the signal to the converter TCU after the signal processing of the unit.
  • the multi-function power supply and driving device can process 6 IGBTs at the same time, so that the power module can get Expected output voltage and current.
  • the shielded multifunctional power supply and driving device adopts a metal shielding isolation frame outside.
  • the upper side plate 1 is a side plate of the metal frame.
  • the upper side plate 1 is a straight plate with two ears. At the same time, a handle 6 is provided on the ear.
  • the upper side plate 1 has a circular connector input interface 9 on the side;
  • the right side plate 2 is a side plate of a metal frame, and the right side plate 2 is a convex side plate.
  • the convex side plate is provided to increase strength At the same time, ensure that the outermost drive power supply unit can be installed on the right side plate 2, there is a layer of insulating plate 17 between the right side plate 2 and the drive power supply unit;
  • the lower side plate 3 is the side plate of the metal frame, the lower side plate 3 It is a side plate with two ears, and the ear is equipped with a handle;
  • the left side plate 4 is a side plate of a metal frame, and the left side plate 4 is an L-shaped side plate with ears, welded between the ear and the end of the side plate Handle;
  • the connecting side plate 5 is the side plate of the metal frame, the connecting side plate 5 is a straight metal plate connecting the upper side plate 1 and the left side plate 4, the nameplate 10 of the device is installed on the connecting side plate 5;
  • the bottom plate 8 The bottom plate of the metal frame is welded with some internally threaded cylinders on the bottom plate 8 to facilitate the installation of the device.
  • the cover plate 7 is the cover plate of the metal frame; the heat dissipation vent 11 is provided on the side plate.
  • the side plates, bottom plate and cover plate described above form a shielded isolation frame; the function of the multi-function power supply and drive device is achieved by some internal components, including integrated harness with shield, photoelectric conversion and drive unit, isolated power supply
  • the electrical signal of the external TCU is transmitted through the input interface 9 and the shielded integrated wiring harness.
  • the design of the integrated wiring harness adopts the design principle of 1 to 6 which can correspond to the control of different 6-channel IGBTs in the inverter circuit, among which The realization of the one-way function includes a photoelectric conversion unit and an isolated power supply.
  • the main function of the photoelectric conversion unit 14 is to convert the drive signal received by the TCU from electricity to an optical drive signal.
  • the IGBT driver receives the optical signal to control the turn-on and turn-off of the IGBT.
  • the driver feeds back the state of the switching device to the photoelectric conversion unit through the optical signal, and returns the electrical signal to the converter TCU through the photoelectric conversion unit.
  • the isolated power supply 15 mainly converts the input 15V electricity to 26V and supplies it to the IGBT driver.
  • each power supply The isolation of the primary and secondary sides of each power supply; the middle two sets of drive power supply units are assembled on the bottom plate 8 of the shielding device after the combination of the metal bracket 16, the insulating plate 17 and the isolation pad column 13, and the two sets of drive power supply units on the side , Installed directly on the right side plate 2 and the left side plate 4 through the insulating plate 17 and the isolation pad 13. All the wire harnesses in the device are bound by the wire binding frame 18, so that the overall layout is clean and tidy.
  • the present invention designs and manufactures a corresponding shielded multifunctional power supply and drive device, which can be installed as a whole in the inverter power module, and is actually assembled in the inverter power module
  • the multi-function power supply unit is installed on the water-cooled radiator, and the signal transmission is carried out with the TCU through the aviation plug of the integrated wiring harness.

Abstract

本发明涉及功率模块的驱动单元，具体为一种带屏蔽的多功能供电及驱动装置，包括金属的屏蔽隔离框架，屏蔽隔离框架上设有输入接口和出线孔，屏蔽隔离框架上分布有散热通风孔，屏蔽隔离框架内布置有隔离电源、光电转换单元和驱动器，外部TCU的电信号通过输入接口和带屏蔽的集成线束进行传输，光电转换单元接收TCU传输的电驱动信号并由电转为光驱动信号，IGBT的驱动器接收光驱动信号来控制IGBT的开通和关断，同时驱动器通过光信号将IGBT的状态反馈给光电转换单元，通过光电转换单元转成电信号反馈给TCU,隔离电源将IGBT驱动器供电。本发明集成度高，尺寸小等优点，将多个IGBT器件的驱动电路系统集成安装，更方便维修维护。

Description

一种带屏蔽的多功能供电及驱动装置 技术领域
本发明涉及功率模块的驱动单元，具体为一种带屏蔽的多功能供电及驱动装置。
背景技术
在大功率永磁交流传动电力机车变流系统中，采用大功率IGBT为开关元件的变流器应用日益广泛，功率模块控制信号传输的可靠性，直接影响到IGBT的可靠性，在功率模块低压信号传输系统中，控制信号与IGBT往往有一定的传输距离，那么周围环境的电磁干扰也就不可避免的会对信号传输产生影响，一般采用双绞线或同轴电缆作为传输媒介，这在对干扰和传输距离要求不高的场合能够满足需求，但在长距离、高电压干扰下往往难以胜任，甚至可能带来安全隐患。
现在采用大功率IGBT为开关元件的变流器中主要存在以下问题：
1)模块低压信号与控制信号采用电信号传输，电路可靠性差；采用单一电缆连接单根导线抗干扰性比较差，从而影响整个电路的可靠性。且在有限空间内功率模块与变流柜配装时需考虑电气间隙、爬电距离、电磁干扰等问题，极大的增加变流柜结构设计的复杂性，也为功率模块的维修维护带来不便。
2)功率模块驱动器所有电源不进行隔离；为了尽量减小信号传输中的各种干扰，除了合理的接地外，还需要使输入与输出之间彼此隔离，现有方案对电源信号不进行二次隔离处理，容易造成驱动电源供电不稳定。
3)整个低压信号的传输未曾进行高低压隔离及低压信号的屏蔽；
大功率功率器件在开关时，电源设备启动停止等会对电信号产生影响，同时输出功率高、环境温度高等影响电缆使用寿命，空间存在高电压，各部件间存在寄生电容，电路之间的电磁效应会引起干扰等。功率模块的低压控制装置裸露安装于外部，未进行单独的屏蔽隔离。
本发明设计一种带屏蔽的多功能供电及驱动装置，应用于大功率永磁功率模块中，主要用于接收TCU的控制信号，并将接收到的电信号进行低压电源隔离和转换，同时将驱动电信号转换为光信号传输给IGBT。合理利 用变流器内空间、方便维护，将多个IGBT器件和驱动电路系统集成安装，形成带屏蔽的多功能供电及驱动单元。
发明内容
本发明的设计依托于大功率永磁功率模块，设计一种带有屏蔽外壳的多功能转换装置，从功率模块的实际应用需求出发，不仅要考虑信号接收及转换功能的实现，以及整个信号传输和转换的可靠性，同时还要考虑整个装置安装的可维护性，所以该多功能转换装置设计严格，解决了以下问题：1)低压信号接收和转换装置带有金属屏蔽壳，抗电磁干扰能力更强，提高了信号传输和功率模块的可靠性；2)传输容量大、可靠性高、电磁兼容性好，IGBT驱动信号采用光电技术，转换后的电信号以光信号形式进行发送使其不易受到周围环境的电磁干扰，提高系统的可靠性，精度和传输距离，对电源信号采用统一优化的电路，保障信号在高电压的干扰环境下可靠传输；3)整个装置集成度高，尺寸小，将多个IGBT器件的驱动电路系统集成安装，更方便维修维护。
本发明是采用如下的技术方案实现的：一种带屏蔽的多功能供电及驱动装置，包括金属的屏蔽隔离框架，屏蔽隔离框架上设有输入接口和出线孔，屏蔽隔离框架上分布有散热通风孔，屏蔽隔离框架内布置有隔离电源、光电转换单元和驱动器，外部TCU的电信号通过输入接口和带屏蔽的集成线束进行传输，光电转换单元接收TCU传输的电驱动信号并由电转为光驱动信号，IGBT的驱动器接收光驱动信号来控制IGBT的开通和关断，同时驱动器通过光信号将IGBT的状态反馈给光电转换单元，通过光电转换单元转成电信号反馈给TCU,隔离电源将IGBT驱动器供电。
上述的一种带屏蔽的多功能供电及驱动装置，屏蔽隔离框架包括底板、盖板、上侧板、下侧板、左侧板和右侧板，散热通风孔设置在侧板上，输入接口设置在上侧板上，出线孔设置在底板上。
上述的一种带屏蔽的多功能供电及驱动装置，还包括连接侧板，上侧板为带有两个耳朵的直板，在两个耳朵之间装有把手，输入接口设置在上侧板的边侧；右侧板为一个凸字型的侧板；下侧板为两个带有耳朵的侧板，在两个耳朵之间装有把手；左侧板为带耳朵的L型侧板，在耳朵和L型侧板端部之间装有把手；连接侧板为连接上侧板和左侧板的直金属板，连接 侧板上装有该装置的铭牌，底板上焊接带内螺纹圆柱体，方便装置的安装，以上所描述的这些侧板、底板及盖板组成了屏蔽隔离框架。
上述的一种带屏蔽的多功能供电及驱动装置，隔离电源采用变压器，实现每一路电源原副边的隔离。
上述的一种带屏蔽的多功能供电及驱动装置，屏蔽隔离框架内位于中间的驱动供电单元(隔离电源、光电转换单元和驱动器)通过金属支架、绝缘板及隔离垫柱组合后，在底板上进行安装，侧面的驱动供电单元通过绝缘板绝缘板及隔离垫柱，直接安装于侧板上，该装置内的所有线束通过绑线架进行绑扎。
本发明技术方案带来的有益效果：
1)这种设计使得低压信号传输容量大、可靠性高、电磁兼容性好；
2)大大简化了功率模块及功率开关器件的布局，节省空间和成本，提高了产品质量和可靠性；
3)整个装置集成度高，尺寸小，将多个IGBT器件的驱动电路系统集成安装，更方便维修维护。
附图说明
图1、图3为本发明的结构示意图。
图2、图4为本发明的内部结构图。
图中：1-上侧板，2-右侧板，3-下侧板，4-左侧板，5-连接侧板，6-把手，7-盖板，8-底板，9-输入接口，10-铭牌，11-散热通风孔，12-线束，13-隔离垫柱，14-光电转换单元，15-隔离电源，16-金属支架，17-绝缘板，18-绑线架，19-出线孔。
具体实施方式
本发明依托大功率永磁电力机车功率模块项目，以功率模块的一种带屏蔽的多功能供电及驱动装置设计方案为具体案例介绍该装置方案和基本原理，形成功率模块单元，主要功能包括主电路的连接、器件的开关控制和散热。
在大功率永磁直驱逆变功率模块设计中，多功能供电驱动装置主要功能为接收变流器TCU给定的控制信号，将信号处理后输出给逆变功率模块 IGBT的驱动器，并给IGBT的驱动器进行供电同时将接收到的IGBT的状态信号反馈给该单元，通过该单元信号处理后传输给变流器TCU，该多功供电及驱动装置一共可以同时处理6只IGBT，使功率模块得到预期的输出电压和电流。带屏蔽的多功能供电及驱动装置外部采用金属的屏蔽隔离框架，上侧板1为金属框架的侧板,上侧板1为带有两个耳朵的直板，同时在耳朵上装有把手6，在上侧板1的边侧有圆形连接器输入接口9；右侧板2为金属框架的侧板,右侧板2为一个凸字型的侧板，设置凸字型侧板是为了增加强度的同时，保证最外侧的驱动供电单元可以安装于右侧板2上，在右侧板2和驱动供电单元中间有一层绝缘板17；下侧板3为金属框架的侧板,下侧板3为带有两个耳朵的侧板，耳朵上装有把手；左侧板4为金属框架的侧板,左侧板4为带耳朵的L型侧板，在耳朵和侧板端部之间焊接有把手；连接侧板5为金属框架的侧板,连接侧板5为连接上侧板1和左侧板4之间的直金属板，在连接侧板5上装有该装置的铭牌10；底板8为金属框架的底板，底板8上焊接一些带内螺纹圆柱体，方便装置的安装，盖板7为金属框架的盖板；散热通风孔11设置在侧板上。以上所描述的这些侧板、底板及盖板组成了屏蔽隔离框架；多功能供电及驱动装置的功能是通过内部的一些部件实现的，包括带屏蔽的集成线束、光电转换及驱动单元、隔离电源等；外部TCU的电信号通过输入接口9和带屏蔽的集成线束进行传输，集成线束的设计采用的是1转6的设计原理，可分别对应逆变电路中不同的6路IGBT的控制，其中一路功能的实现包括光电转换单元和隔离电源，光电转换单元14主要功能是将TCU接收的驱动信号由电转为光驱动信号，IGBT的驱动器接收光信号来控制IGBT的开通和关断，同时IGBT的驱动器通过光信号将开关器件的状态反馈给光电转换单元，通过光电转换单元转成电信号反馈给变流器TCU,隔离电源15主要将输入的15V电转换为26V，供给IGBT的驱动器，同时实现每一路电源原副边的隔离；中间的两组驱动供电单元，通过金属支架16、绝缘板17及隔离垫柱13组合后，在屏蔽装置的底板8上进行安装，侧面的两组驱动供电单元，通过绝缘板17及隔离垫柱13直接安装于右侧板2和左侧板4上。该装置内的所有线束通过绑线架18进行绑扎，使整体布局干净整洁。
本发明根据集成低压信号转接器的方案和原理，设计制作了相应的带 屏蔽的多功能供电及驱动装置，该装置可以作为整体安装于逆变功率模块内，实际在逆变功率模块组装中，多功能供电单元安装于水冷散热器上，通过集成线束的航空插头与TCU进行信号传输，同时在底板上设置有两个出线孔，控制IGBT的信号和电源信号均从这个位置穿出去。

Claims (5)

  1. 一种带屏蔽的多功能供电及驱动装置，其特征在于包括金属的屏蔽隔离框架，屏蔽隔离框架上设有输入接口(9)和出线孔(19)，屏蔽隔离框架上分布有散热通风孔(11)，屏蔽隔离框架内布置有隔离电源、光电转换单元和驱动器，外部TCU的电信号通过输入接口(9)和带屏蔽的集成线束进行传输，光电转换单元接收TCU传输的电驱动信号并转为光驱动信号，IGBT的驱动器接收光驱动信号来控制IGBT的开通和关断，同时驱动器通过光信号将IGBT的状态反馈给光电转换单元，通过光电转换单元转成电信号反馈给TCU,隔离电源(15)给IGBT驱动器供电。
  2. 根据权利要求1所述的一种带屏蔽的多功能供电及驱动装置，其特征在于屏蔽隔离框架包括底板(8)、盖板(7)、上侧板(1)、下侧板(3)、左侧板(4)和右侧板(2)，散热通风孔(11)设置在侧板上，输入接口(9)设置在上侧板(1)上，出线孔设置在底板(8)上。
  3. 根据权利要求2所述的一种带屏蔽的多功能供电及驱动装置，其特征在于还包括连接侧板(5)，上侧板(1)为带有两个耳朵的直板，在两个耳朵之间装有把手(6)，输入接口(9)设置在上侧板(1)的边侧；右侧板(2)为一个凸字型的侧板；下侧板(3)为两个带有耳朵的侧板，在两个耳朵之间装有把手；左侧板(4)为带耳朵的L型侧板，在耳朵和L型侧板端部之间装有把手；连接侧板(5)为连接上侧板(1)和左侧板(4)的直金属板，连接侧板(5)上装有该装置的铭牌(10)，底板(8)上焊接带内螺纹圆柱体，方便装置的安装，以上所描述的这些侧板、底板及盖板组成了屏蔽隔离框架。
  4. 根据权利要求1或2所述的一种带屏蔽的多功能供电及驱动装置，其特征在于隔离电源(15)采用变压器，实现每一路电源原副边的隔离。
  5. 根据权利要求1或2所述的一种带屏蔽的多功能供电及驱动装置，其特征在于屏蔽隔离框架内位于中间的驱动供电单元通过金属支架(16)、绝缘板(17)及隔离垫柱(13)组合后，在底板上进行安装，侧面的驱动供电单元通过绝缘板(17)及隔离垫柱(13)直接安装于侧板上，该装置内的所有线束通过绑线架(18)进行绑扎。
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