Optics and Precision Engineering, Volume. 31, Issue 1, 42(2023)

Design of safety integrated servo motor drive module

Lingyu CHEN... Jieji ZHENG, Aihua HE and Dapeng FAN* |Show fewer author(s)
Author Affiliations
  • College of Intelligence Science and Technology, National University of Defense Technology, Changsha410073, China
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    Figures & Tables(16)
    Schematic diagram of FOC closed-loop control
    Hardware architecture schematic of typical servo drive system
    Functional block diagram of driver control software
    Schematic diagram of drive safety diagnostic software function
    Schematic diagram of hardware architecture of drive safety-related system
    Schematic diagram of security function architecture
    Function block diagram of drive safety integrated software
    Self-developed high power density servo drive module
    Schematic block diagram of experimental setup of servo drive safety integrated function
    Servo drive safety integrated function experiment platform
    Motion curves of motor in torque mode STO protection
    Motor movement curves in speed mode SS1 protection
    Motion curves of motor in position mode SS2 protection
    • Table 1. Failure modes of servo drive

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      Table 1. Failure modes of servo drive

      失效模式失效因素产生原因后果影响
      指令输入信号异常脉冲信号错误噪声干扰;电气连接驱动器指令失效,负载运动失控
      脉冲频率过高噪声干扰;控制器失效
      模拟幅值过大控制器硬件不匹配

      传感器反馈

      信号异常

      电流数据误差环境变化;噪声干扰影响闭环控制,严重时将导致飞车
      电流传感器失效传感器失效;连接失效
      编码器数据错误编码器异常;电气干扰
      编码器不反馈传感器失效;连接失效
      通信异常通信不连续通信链路被干扰负载不响应或间歇性响应指令
      通信中断通信链路被破坏
      电源异常母线电源欠压电源电压低或功率低控制器输出矢量与理论不符
      母线电源过压电源故障;泄放电阻断路或不匹配
      母线过流母线短路;电机相线接地或短路;逆变器桥臂上下导通等引起电机、功率器件、电源烧坏
      控制电源不稳定电源故障;电压转换电路故障IC无法正常工作

      功率器件及

      负载异常

      功率器件或电机过热环境温度过高;散热不良;长时间重载运行电机或功率器件烧毁
      功率器件损坏功率器件短路或断路短路导致电机烧坏,断路导致电机失控
      电机损坏电机绕组短路或断路
      闭环控制异常过载控制失效;电机重载;负载卡死电机功率器件温升快
      过速指令异常;反馈异常;控制失效电机温升过快
      超过限位限位开关失效损坏机械结构
      速度偏差过大转矩饱和;转矩波动;控制参数不合理导致电机及负载无法达到指令运动状态
      位置偏差过大转矩饱和;超调;控制参数不合理
    • Table 2. Phase voltage relationship in each vector state

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      Table 2. Phase voltage relationship in each vector state

      矢量状态SaSbScVasVbsVcs
      1002Vdc/3-Vdc/3-Vdc/3
      101Vdc/3-2Vdc/3Vdc/3
      001-Vdc/3-Vdc/32Vdc/3
      011-2Vdc/3Vdc/3Vdc/3
      010-Vdc/32Vdc/3-Vdc/3
      110Vdc/3Vdc/3-2Vdc/3
      000000
      111000
    • Table 3. Servo drive safety functions recommended by IEC61800-5-2

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      Table 3. Servo drive safety functions recommended by IEC61800-5-2

      No.安全功能功能描述功能类型
      1安全转矩截止(STO)能够引起运动的电源不被作用到电机安全停止
      2安全停止1(SS1)电机减速后通过STO使电机停止安全停止
      3安全操作停止(SOS)防止电机偏离停止位置大于设定值安全停止
      4安全停止2(SS2)电机减速后通过SOS使电机停止安全停止
      5安全极限加速度(SLA)防止电机超过加/速度限制安全停止
      6安全加速度范围(SAR)保持电机加/减速度在限制范围内安全监视
      7安全极限速度(SLS)防止电机超过规定的速度限制安全监视
      8安全速度范围(SSR)保持电机在规定的速度限制范围内安全监视
      9安全极限转矩(SLT)防止电机超过转矩限制安全监视
      10安全转矩范围(STR)保持电机在规定的转矩限制范围内安全监视
      11安全限位(SLP)防止电机超过规定的位置限值安全监视
      12安全极限增量(SLI)防止电机超过指定的位置增量安全监视
      13安全方向(SDI)防止电机在非指定方向上移动超过限制安全监视
      14安全电机温度(SMT)防止电机温度超过指定上限安全监视
      15安全制动控制(SBC)提供安全输出信号控制外部制动设备安全输出
      16安全位置监视(SCA)输出安全信号指示电机位置是否在限制范围安全输出
      17安全速度监视(SSM)输出安全信号指示电机速度是否低于设定值安全输出
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    Lingyu CHEN, Jieji ZHENG, Aihua HE, Dapeng FAN. Design of safety integrated servo motor drive module[J]. Optics and Precision Engineering, 2023, 31(1): 42

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    Paper Information

    Category: Independently Cotrollable Key Technology of manufacture equipment programmable control system

    Received: Sep. 2, 2022

    Accepted: --

    Published Online: Feb. 9, 2023

    The Author Email: FAN Dapeng (fdp@nudt.edu.cn)

    DOI:10.37188/OPE.20233101.0042

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