求信号 Electric braking request signal
在有制动施加命令时，制动控制单元输出电制动请求信号(再生模式信号)至牵引系统VVVF逆变控制器作为电制动力的请求命令信号。电制动力与电制动请求PWM信号占空比的关系如图6所示：
When braking applying command exists, braking control unit sends electric braking request signal (regenerative mode signal) to VVVF inversion controller of traction system as request command signal for electric braking force.The relation between electric braking force and electric braking request PWM signal duty ratio is shown in Fig.6:
请求信号占空比[%] Duty ratio of request signal [%]
请求电制动力[kN] Request electric braking force [kN]
图6电制动请求信号 Fig.6 Electric braking request signal
5. 电制动反馈信号 Electric braking feedback signal
牵引系统VVVF逆变控制器根据电制动请求信号产生电制动力，电制动反馈信号是由VVVF逆变控制器输出到制动控制单元的实际电制动力信号.电制动反馈PWM信号占空比与实际电制动力的关系如图7所示：
VVVF inversion controller of traction system produces electric braking force according to electric braking request signal, and electric braking feedback signal is practical electric braking force signal from VVVF inversion controller to braking control unit. The relation between electric braking feedback PWM signal duty ratio and practical electric braking force is shown in Fig.7:
反馈信号占空比[%] Duty ratio of feedback signal [%]
实际电制动力[kN] Actual electric braking force [kN]
图7 电制动反馈信号 Fig.7. Electric braking feedback signal
6. 牵引载重(空重车)信号 Traction loading (unloaded car) signal
牵引载重信号（牵引用空重车信号）是和乘客重量成比例的信号，载重由制动控制单元测量并送到牵引系统VVVF逆变控制器，VVVF逆变控制器用载重信号来补偿输出力矩。VVVF逆变控制器只接收本动车的载重信号。牵引载重PWM信号占空比与动车重量的关系如图8所示：
Traction loading signal (unloaded car signal for traction) is the signal proportional to the weight of passengers, loading is measured by braking control unit and sent to VVVF inversion controller of traction system, which will compensate output torque with loading signal.VVVF inversion controller only receives the loading signal of this motor car.The relation between traction loading PWM signal duty ratio and motor car weight is shown in Fig.8:
占空比（%） Duty ratio (%)
重量（t） Weight (t)
图8 牵引载重信号 Fig.8 Traction loading signal
华译网上海翻译公司曾经翻译过大量有关电制动力资料文件，Beijing Chinese Subtitling Translation Service Agency has translated many technical documents about Electric braking.
动车的重量是用空簧压力来测量的，动车的重量与空簧压力关系如图9所示：The weight of a motor car is measured by air spring pressure, and the relation between motor car weight and air spring pressure is shown in Fig.9:
空簧压力（kPa） Air spring pressure (kPa)
重量（t） Weight (t)
图9 动车空簧压力信号 Fig.9 Air spring pressure signal of a motor car
7. PWM指令 PWM command
当非制动指令线(217线)失电时(OFF),制动控制装置实施制动控制，PWM制动指令与减速度(?)的计算关系为：
When non-braking command line (217-line) is de-electrified (OFF), the braking control unit will implement braking control, calculating relation between PWM braking command and deceleration (?) is as follows:
?[m/s2]=(PWM[%])-15)÷58.33
或 Or PWM[%]=?[m/s2]×58.33+15
当PWM占空比5<% 或>95%持续2.5秒以上时按PWM故障处理，减速度为1.24m/s2。PWM信号占空比与制动减速度对应关系如图10所示。
PWM duty ratio of 5<% or>95% for over 2.5 seconds will be treated as PWM failure, deceleration is 1.24m/s2. Corresponding relation between PWM signal duty ratio and braking deceleration is shown in Fig.10.
减速度 Deceleration
制动指令（占空比） Braking command (duty ratio)
图10 PWM信号占空比与制动减速度对应关系
Fig.10. Corresponding relation between PWM signal duty ratio and braking deceleration
8. 制动控制装置与TMS接口信号 Braking control unit and TMS interface signal
制动控制装置与TMS之间采用EIA-485信号进行数据通信，485通信采用三线方式，即二个通信线（PBS1，PBS2）和一个485通信地线(PBSG)。
EIA-485 signal is used for data communication between braking control unit and TMS, and 485 communication adopts three-line mode, i.e., two communication lines (PBS1，PBS2) and a 485 communication grounding line (PBSG).
制动控制装置通过一个的隔离的开关输出信号（PB3、24F2）向TMS表示空气制动系统是否正常（见图11）。当空气制动系统正常时，PB3、24F2之间的电子开关闭合；当空气制动系统失效时，PB3、24F2之间的电子开关断开。
The braking control unit indicates, via an isolated digit output signal (PB3、24F2), whether air braking system id normal to TMS (see Fig.11). When air brake system is normal, an electric switch between PB3 and 24F2 is closed; when air brake system is failed, the electric switch between PB3 and 24F2 is off.
开关量输出 Digit variable output
控制信号 Control signal
控制地线 Control grounding
开头量输出+ Digit variable output +
开关量输出- Digit variable output -
图11 开关量输出接口电路 Fig.11 Interface circuit of digit variable output
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