WO2014000480A1 - 一种直流电机驱动的引风机 - Google Patents

一种直流电机驱动的引风机 Download PDF

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Publication number
WO2014000480A1
WO2014000480A1 PCT/CN2013/073176 CN2013073176W WO2014000480A1 WO 2014000480 A1 WO2014000480 A1 WO 2014000480A1 CN 2013073176 W CN2013073176 W CN 2013073176W WO 2014000480 A1 WO2014000480 A1 WO 2014000480A1
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WO
WIPO (PCT)
Prior art keywords
motor
unit
draft fan
switch
ecm
Prior art date
Application number
PCT/CN2013/073176
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English (en)
French (fr)
Inventor
鲁楚平
赵勇
王雄程
Original Assignee
中山大洋电机股份有限公司
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Publication date
Application filed by 中山大洋电机股份有限公司 filed Critical 中山大洋电机股份有限公司
Publication of WO2014000480A1 publication Critical patent/WO2014000480A1/zh
Priority to US14/332,361 priority Critical patent/US20140328705A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/004—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying driving speed
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
    • H02P6/08—Arrangements for controlling the speed or torque of a single motor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Definitions

  • the utility model relates to an induced draft fan driven by a direct current motor.
  • the induced draft fan is driven by a single-phase AC motor PSC.
  • the structure is shown in Figure 1.
  • the system controller outputs multiple gear switch signals to control the single-phase AC motor PSC.
  • These gear switch signals are high-voltage AC.
  • Signal such as 220V AC signal, 115V AC signal, etc.
  • the motor uses single-phase AC motor, low efficiency, relatively energy consumption, high noise, and low controllability.
  • the technical solution has poor compatibility, different application loads must be designed with different motors to be adapted, the development cycle is long, the management cost is high, the versatility is poor, and the adjustment and use are inconvenient.
  • ECM motors Electronically commutated motors
  • ECM motor (electronically commutated motor)
  • typical ECM motor has DC brushless motor, switched reluctance motor, permanent magnet synchronous motor, etc.
  • ECM motor has high energy saving, reliability and controllability, low noise and easy to realize intelligent The characteristics can be easily adjusted to adjust the torque and air volume of the output, thereby reducing development time and saving development costs.
  • the induced draft fan which is generally sold, has different parameters such as output power, torque, speed and air volume due to different applications, and is generally not connected to the system controller, that is, the system controller and the induced draft fan are not Correlation, therefore, it is very important to adjust the operating parameters of the induced draft fan at any time.
  • the purpose of the utility model is to provide a direct current induced draft fan, which adopts an energy-efficient ECM motor instead of the traditional single-phase AC motor PSC, and can conveniently adjust the operating parameters of the motor, and the user is very intuitive and convenient to use.
  • a direct current motor driven draft fan includes an induced draft fan housing, a wind wheel installed inside the induced draft fan housing, an ECM motor mounted on the surface of the induced draft fan housing, and the ECM motor includes an ECM motor body and an ECM motor control
  • the ECM motor body includes a stator, a rotor and a motor casing. The end of the shaft on the rotor extends into the fan casing and is connected to the rotor.
  • the ECM motor body and the ECM motor controller are connected by wires.
  • the ECM motor controller is The control circuit board without the control box is provided with a microprocessor unit, an IGBT switch and a driving unit and a motor operating parameter detecting unit on the control circuit board, and the motor operating parameter detecting unit sends the motor running parameter to the microprocessor unit, and the micro processing
  • the output signal of the unit controls the IGBT switch and the driving unit, and the output end of the IGBT switch and the driving unit is connected to the coil winding on the stator, and the DIP switch unit is also arranged on the control circuit board, and the output end of the DIP switch unit and the microprocessor unit are The input is connected.
  • the DIP switch unit described above is composed of a plurality of independent DIP switches.
  • the number of the DIP switches described above is 7 to 15.
  • the microprocessor unit described above reads the information of each of the dial switches of the dial switch unit to form a group of codes, selects different speed, torque and air volume parameters, and then outputs signals to control the IGBT switch and the drive unit.
  • the control circuit board described above further comprises a gear position switch detecting circuit, the gear position switch detecting circuit detecting system controller outputs a plurality of gear position switch signals, and sends them to the microprocessor unit for processing, and the microprocessor unit is based on the gear position switch
  • the signal output signal controls the IGBT switch and drive unit.
  • the gear position detecting circuit described above includes a plurality of optocoupler isolation circuits.
  • microprocessor unit described above is also connected with a communication port, and the microprocessor unit is connected to the upper PC through the communication port, and the upper PC computer programmatically sets or modifies the motor running parameters in the microprocessor unit.
  • the utility model has the following advantages: 1) The induced draft fan of the utility model is driven by an ECM motor, the ECM motor controller is a control circuit board without a control box, and the microprocessor unit is arranged on the control circuit board. IGBT switch and drive unit and motor running parameter detecting unit, the DIP switch unit is also provided on the control circuit board, the output end of the DIP switch unit is connected with the input end of the microprocessor unit, and the microprocessor unit reads the DIP switch The information of each dial switch of the unit forms a set of codes, selects different speed, torque and air volume parameters, and then outputs signals to control the IGBT switch and the drive unit.
  • the DIP switch unit code can intuitively and conveniently adjust the parameters such as the speed, torque and air volume of the induced draft fan and the operation mode. It is easy to use and meet customer requirements. 2)
  • the DIP switch unit consists of several independent DIP switches. The number of dial switches is 7 to 15, and a wider combination is available.
  • the control circuit board further includes a gear position switch detection circuit, and the gear position switch detection circuit detects that the system controller outputs a plurality of gear position switch signals and sends them to the microprocessor unit for processing, the microprocessor
  • the unit controls the IGBT switch and the drive unit according to the gear switch signal output signal, and can be docked with the system controller to expand the scope of the application;
  • the microprocessor unit described above is also connected with a communication port, and the microprocessor unit passes through the communication port. Connected to the upper PC, the upper PC can be programmed to modify or modify the motor running parameters in the microprocessor unit to facilitate debugging of the induced draft fan.
  • Figure 1 is an electrical schematic diagram of an existing induced draft fan
  • FIG. 2 is a schematic structural view of the induced draft fan of the present invention
  • Figure 3 is a cross-sectional view showing the structure of the induced draft fan of the present invention
  • Figure 4 is a schematic block diagram of the utility model
  • Figure 5 is a block diagram of a specific circuit corresponding to Figure 4.
  • a direct current motor driven draft fan includes an induced draft fan housing 1, a wind wheel 2 installed inside the induced draft fan housing, and an air blower mounted on the air blower.
  • the ECM motor on the surface of the casing 1 includes an ECM motor body 3 and an ECM motor controller.
  • the ECM motor body includes a stator 31, a rotor 32 and a motor casing 33.
  • the shaft end portion 320 of the rotor 32 extends into the fan casing.
  • the body 1 is connected to the wind wheel 2, the ECM motor body and the ECM motor controller are connected by a wire 5, the ECM motor controller is a control circuit board 4 without a control box, and the control circuit board 4 is provided with a microprocessor unit and an IGBT.
  • the switch and the drive unit and the motor operating parameter detecting unit, the motor running parameter detecting unit sends the motor running parameter to the microprocessor unit, the microprocessor unit output signal controls the IGBT switch and the driving unit, and the output end of the IGBT switch and the driving unit is connected to the stator
  • the control circuit board 4 is further provided with a dial switch unit 6, and the output end of the dial switch unit 6 is connected to the input end of the microprocessor unit.
  • the dial switch unit 6 described above is composed of a plurality of independent dial switches, the number of dial switches is 7 to 15, and the microprocessor unit reads the information of each dial switch of the dial switch unit to form a The group code selects different speed, torque and air volume parameters, and then outputs signals to control the IGBT switch and drive unit.
  • the microprocessor unit is a single-chip MCU or a digital signal processor DSP; the control circuit board 4 described above further includes a gear position switch detection circuit, and the gear position switch detection circuit detects that the system controller outputs a plurality of gear position switch signals, and sends To the microprocessor unit processing, the microprocessor unit controls the IGBT switch and the driving unit according to the gear position switch signal output signal, and the gear position switch detecting circuit described above includes a plurality of optocoupler isolation circuits.
  • the microprocessor unit described above is also connected with a communication port, and the microprocessor unit passes through the communication port.
  • the upper PC computer can program or modify the motor running parameters in the microprocessor unit.
  • Embodiment 1 It is assumed that the DIP switch unit 6 is composed of nine DIP switches.
  • the microprocessor unit reads the information of each DIP switch of the DIP switch unit.
  • Code 001001111 represents the motor operating at constant speed, the speed is 1000 rev / min, the microprocessor unit outputs the corresponding signal to control the IGBT switch and drive unit.
  • Embodiment 2 It is assumed that the DIP switch unit 6 is composed of 9 DIP switches.
  • the code of the 9 DIP switches is: 101011100
  • the microprocessor unit reads the information of each DIP switch of the DIP switch unit.
  • the code 101011100 represents that the motor operates under constant torque with a torque of 400 Nm.
  • the microprocessor unit outputs a corresponding signal to control the IGBT switch and drive unit.
  • Embodiment 3 It is assumed that the DIP switch unit 6 is composed of 9 DIP switches.
  • the code of the 9 DIP switches is: 110011001
  • the microprocessor unit reads the information of each DIP switch of the DIP switch unit.
  • the code 110011001 represents that the motor operates at a constant air volume with a torque of 600 Nm and a rotational speed of 800 rpm.
  • the microprocessor unit outputs a corresponding signal to control the IGBT switch and drive unit.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Positive-Displacement Air Blowers (AREA)
  • Control Of Electric Motors In General (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

一种直流电机驱动的引风机，包括引风机壳体、风轮、和ECM电机，ECM电机包括ECM电机实体和ECM电机控制器，ECM电机实体和ECM电机控制器通过电线连接，ECM电机控制器是不带控制盒的控制线路板，控制线路板上设置有微处理器单元、IGBT开关及驱动单元和电机运行参数检测单元，电机运行参数检测单元将电机运行参数送到微处理器单元，微处理器单元输出信号控制IGBT开关及驱动单元，IGBT开关及驱动单元的输出端连接定子上的线圈绕组，控制线路板上还设置拨码开关单元，拨码开关单元的输出端与微处理器单元的输入端连接，它能方便地调节电机的运行参数，用户使用非常直观方便。

Description

一种直流电机驱动的引风机
技术领域
本实用新型涉及一种直流电机驱动的引风机。
背景技术
目前， 引风机的多采用单相交流电机 PSC来驱动，其结构如图 1所示， 系统 控制器输出多个档位开关信号来控制单相交流电机 PSC, 这些档位开关信号是 高压的交流信号（如 220V的交流信号， 115V的交流信号等）， 电机采用单相交 流电机， 效率低， 比较耗能、 噪音也大， 可控性智能程度低。 该技术方案兼容 性差，不同的应用负载都要设计不同的电机来适配，开发周期长，管理成本高， 通用性差， 调节使用不方便。
近几年， 随着竞争日趋激烈， 对产品技术要求不断提高， 如要求产品节能 环保、可控性智能化程度高、开发周期短等。随着电子控制和电机技术的发展， 电子换向电机快速发展并得到更广泛应用， 电子换向电机简称 ECM电机
(electronically commutated motor) , 典型的 ECM电机有直流无刷电机、 开 关磁阻电机、 永磁同步电机等， ECM电机具有节能环保、 可靠性和可控性都比 较高、噪音小、容易实现智能化等特点，可以解决方便调整输出的力矩和风量， 从而可以缩小开发时间和节省开发成本。
一般卖出去的引风机， 由于应用场合不同， 其运行的输出功率、 转矩、 转 速和风量等参数是不同的， 而且一般与系统控制器不连接， 也就是说系统控制 器与引风机没有关联， 因此， 随时方便调节引风机运行参数变得非常重要。
虽然目前的引风机（BLOWER)有应用 ECM电机， 但客户在调整 ECM电机的 输出功率、转矩、 转速和风量时还是比较麻烦， 要么请电机开发商的专业编程 人员来改写电机的控制程序， 要么更换电机， 使用非常不便。 发明内容
本实用新型的目的是提供一种直流引风机 ， 采用高效节能的 ECM电机代 替传统的单相交流电机 PSC, 并且能方便地调节电机的运行参数， 用户使用非 常直观方便。
本实用新型的技术方案如下：
一种直流电机驱动的引风机，包括引风机壳体、安装在引风机壳体里面的 风轮、 安装在引风机壳体表面的 ECM电机， ECM电机包括 ECM电机实体和 ECM 电机控制器， ECM电机实体包括定子、 转子和电机外壳， 转子上的转轴端部伸 入到引风机壳体里面与风轮连接， ECM电机实体和 ECM电机控制器通过电线连 接， ECM电机控制器是不带控制盒的控制线路板， 控制线路板上设置有微处理 器单元、 IGBT 开关及驱动单元和电机运行参数检测单元， 电机运行参数检测 单元将电机运行参数送到微处理器单元， 微处理器单元输出信号控制 IGBT开 关及驱动单元， IGBT 开关及驱动单元的输出端连接定子上的线圈绕组， 控制 线路板上还设置拨码开关单元，拨码开关单元的输出端与微处理器单元的输入 端连接。
上述所述的拨码开关单元由若干个独立的拨码开关组成。
上述所述的拨码开关的数目是 7个至 15个。
上述所述的微处理器单元读取拨码开关单元各个拨码开关的信息， 形成一 组编码， 选择不同的转速、 力矩和风量参数， 然后输出信号控制 IGBT开关及 驱动单元。
上述所述的控制线路板上还包括档位开关检测电路， 档位开关检测电路检 测系统控制器输出多个档位开关信号， 并送到微处理器单元处理，微处理器单 元根据档位开关信号输出信号控制 IGBT开关及驱动单元。 上述所述的档位开关检测电路是包括若干个光耦隔离电路。
上述所述的微处理器单元还连接有通信端口，微处理器单元通过通信端口 与上位 PC电脑连接，上位 PC电脑通过编程设定或者修改微处理器单元里面的 电机运行参数。
本实用新型与现有技术相比具有如下优点： 1 )本实用新型的引风机用 ECM 电机驱动， ECM电机控制器是不带控制盒的控制线路板， 控制线路板上设置有 微处理器单元、 IGBT 开关及驱动单元和电机运行参数检测单元， 控制线路板 上还设置拨码开关单元， 拨码开关单元的输出端与微处理器单元的输入端连 接， 微处理器单元读取拨码开关单元各个拨码开关的信息， 形成一组编码， 选 择不同的转速、 力矩和风量参数， 然后输出信号控制 IGBT开关及驱动单元， 因此， 引风机领域的普通技术人员无须知道编程， 利用操作手册设定拨码开关 单元编码， 就能直观方便调节引风机的转速、 力矩和风量等参数及运行模式， 使用简单方便， 满足客户需求； 2 ) 拨码开关单元由若干个独立的拨码开关组 成， 拨码开关的数目是 7个至 15个， 得到较为宽广的组合编码信息， 基本满 足用户需求； 3 ) 控制线路板上还包括档位开关检测电路， 档位开关检测电路 检测系统控制器输出多个档位开关信号， 并送到微处理器单元处理，微处理器 单元根据档位开关信号输出信号控制 IGBT开关及驱动单元， 可以与系统控制 器对接， 扩充应用的范围； 4) 上述所述的微处理器单元还连接有通信端口， 微处理器单元通过通信端口与上位 PC电脑连接，上位 PC电脑通过编程设定或 者修改微处理器单元里面的电机运行参数， 方便调试引风机。
附图说明：
图 1是现有的引风机的电器原理图；
图 2是本实用新型引风机的结构示意图； 图 3是本实用新型引风机的结构剖视图；
图 4是本实用新型的原理方框图；
图 5是图 4对应的的具体电路方框图。
具体实施方式：
如图 2、 图 3、 图 4和图 5所示， 一种直流电机驱动的引风机， 包括引 风机壳体 1、安装在引风机壳体里面的风轮 2、安装在引风机壳体 1表面的 ECM 电机， ECM电机包括 ECM电机实体 3和 ECM电机控制器， ECM电机实体包括定 子 31、 转子 32和电机外壳 33， 转子 32上的转轴端 320部伸入到引风机壳体 1里面与风轮 2连接， ECM电机实体和 ECM电机控制器通过电线 5连接， ECM 电机控制器是不带控制盒的控制线路板 4， 控制线路板 4上设置有微处理器单 元、 IGBT 开关及驱动单元和电机运行参数检测单元， 电机运行参数检测单元 将电机运行参数送到微处理器单元， 微处理器单元输出信号控制 IGBT开关及 驱动单元， IGBT 开关及驱动单元的输出端连接定子上的线圈绕组， 控制线路 板 4上还设置拨码开关单元 6， 拨码开关单元 6的输出端与微处理器单元的输 入端连接， 上述所述的拨码开关单元 6由若干个独立的拨码开关组成， 拨码 开关的数目是 7个至 15个， 微处理器单元读取拨码开关单元各个拨码开关的 信息， 形成一组编码， 选择不同的转速、 力矩和风量参数， 然后输出信号控制 IGBT开关及驱动单元。 微处理器单元是单片机 MCU或者数字信号处理器 DSP; 上述所述的控制线路板 4上还包括档位开关检测电路，档位开关检测电路检测 系统控制器输出多个档位开关信号， 并送到微处理器单元处理，微处理器单元 根据档位开关信号输出信号控制 IGBT开关及驱动单元， 上述所述的档位开 关检测电路是包括若干个光耦隔离电路。
上述所述的微处理器单元还连接有通信端口，微处理器单元通过通信端口 与上位 PC电脑连接，上位 PC电脑通过编程设定或者修改微处理器单元里面的 电机运行参数。
原理说明： 引风机领域的普通技术人员无须知道编程， 利用操作手册设 定拨码开关单元编码， 就能直观方便调节引风机的转速、力矩和风量等参数及 运行模式， 使用简单方便， 满足客户需求，操作手册上将不同的拨码开关单元 编码代表的含义全部记录， 引风机领域的普通技术人员根据实际的运行环境， 可以自行方便直观设定引风机运行模式和参数。
实施例一： 假设拨码开关单元 6由 9个的拨码开关组成， 当 9个的拨码 开关的编码为： 001001111时， 微处理器单元读取拨码开关单元各个拨码开关 的信息， 编码 001001111代表电机在恒转速下工作， 转速为 1000转 /分， 微处 理器单元输出相应的信号控制 IGBT开关及驱动单元。
实施例二： 假设拨码开关单元 6由 9个的拨码开关组成， 当 9个的拨码 开关的编码为： 101011100时， 微处理器单元读取拨码开关单元各个拨码开关 的信息， 编码 101011100代表电机在恒转矩下工作， 转矩为 400牛.米， 微处 理器单元输出相应的信号控制 IGBT开关及驱动单元。
实施例三： 假设拨码开关单元 6由 9个的拨码开关组成， 当 9个的拨码 开关的编码为： 110011001时， 微处理器单元读取拨码开关单元各个拨码开关 的信息， 编码 110011001代表电机在恒风量下工作， 转矩为 600牛.米， 转速 为 800转 /分， 微处理器单元输出相应的信号控制 IGBT开关及驱动单元。

Claims

权利要求
1、 一种直流电机驱动的引风机， 包括引风机壳体、 安装在引风机壳体里 面的风轮、 安装在引风机壳体表面的 ECM电机， ECM电机包括 ECM电机实体和 ECM电机控制器， ECM电机实体包括定子、 转子和电机外壳， 转子上的转轴端 部伸入到引风机壳体里面与风轮连接， ECM电机实体和 ECM电机控制器通过电 线连接， 其特征在于： ECM电机控制器是不带控制盒的控制线路板， 控制线路 板上设置有微处理器单元、 IGBT 开关及驱动单元和电机运行参数检测单元， 电机运行参数检测单元将电机运行参数送到微处理器单元，微处理器单元输出 信号控制 IGBT开关及驱动单元， IGBT开关及驱动单元的输出端连接定子上的 线圈绕组，控制线路板上还设置拨码开关单元， 拨码开关单元的输出端与微处 理器单元的输入端连接。
2、 根据权利要求 1所述的一种直流电机驱动的引风机， 其特征在于： 所 述的拨码开关单元由若干个独立的拨码开关组成。
3、 根据权利要求 1所述的一种直流电机驱动的引风机， 其特征在于： 拨 码开关的数目是 7个至 12个。
4、 根据权利要求 1所述的一种直流电机驱动的引风机， 其特征在于： 微 处理器单元读取拨码开关单元各个拨码开关的信息， 形成一组编码，选择不同 的转速、 力矩和风量参数， 然后输出信号控制 IGBT开关及驱动单元。
5、 根据权利要求 1或 2或 3或 4所述的一种直流电机驱动的引风机， 其 特征在于：控制线路板上还包括档位开关检测电路， 档位开关检测电路检测系 统控制器输出多个档位开关信号， 并送到微处理器单元处理，微处理器单元根 据档位开关信号输出信号控制 IGBT开关及驱动单元。
6、 根据权利要求 5所述的一种直流电机驱动的引风机， 其特征在于： 所 述的档位开关检测电路是包括若干个光耦隔离电路。
7、根据权利要求 5所述的一种直流电机驱动的引风机， 其特征在于: 微处理器单元还连接有通信端口， 微处理器单元通过通信端口与上位 PC电脑 连接，上位 PC电脑通过编程设定或者修改微处理器单元里面的电机运行参数。
PCT/CN2013/073176 2012-06-30 2013-03-26 一种直流电机驱动的引风机 WO2014000480A1 (zh)

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