制动控制装置与牵引系统电气接口说明
Description on Electric Interface between Braking
Control Unit and Traction System
1. 制动控制装置与牵引系统的电气接口
Electric Interface between Braking Control Unit and Traction System
制动控制装置与牵引系统的电气接口如图1所示：从牵引系统输入的数字量信号有3个，分别是：再生制动有效信号(298线)、再生制动衰退信号(29A线)和反向超速信号 (297线)；从牵引系统输入的PWM脉冲信号只有1个，即再生制动反馈信号(288A线PWM+、288B线PWM-)；制动控制装置向牵引系统发送的PWM脉冲信号有两路，分别为再生制动请求指令(288C线PWM+、288D线PWM-)和牵引载重信号(288E线PWM+、288F线PWM-)，
Electric interface between braking control unit and reaction system is shown in Fig. 1: there are 3 input digital signals from traction system, they are: effective signal of regenerative brake (298-line), decay signal of regenerative brake (29A-line) and reverse overspeed signal (297-line); only one PWM input pulse signal from traction system, i.e. Feedback signal of regenerative brake (288A-line PWM+, 288B-line PWM-); there are two PWM pulse signal sent from braking control unit to traction system, they are request command of regenerative brake (288C-line PWM+, 288D-line PWM-) and traction loading signal (288E-line PWM+, 288F-line PWM-).
牵引系统VVVF控制器 Traction system VVVF controller
（再生反馈PWM-） (Regenerative feedback PWM-)
（反向超速检测） (Reverse overspeed detection)
（再生有效） (Regenerative effective)
（再生衰退） (Regenerative decay)
（再生指令PWM+） (Regenerative command PWM+)
（再生指令PWM-） (Regenerative command PWM-)
（牵引载重PWM+） (Traction loading PWM+)
（牵引载重PWM-） (Traction loading PWM-)
制动控制装置 Braking control unit
图1 制动控制装置与牵引系统的电气接口
Fig.1. Electric Interface between Braking Control Unit and Traction System
华译网上海翻译公司曾经翻译过大量有关制动控制装置资料文件，Beijing Chinese Subtitling Translation Service Agency has translated many technical documents about Braking control unit.
2. 接口电路 Interface circuit
2.1 数字量输入电路 Digital input circuit
制动控制装置的110V数字信号采用光电隔离输入方式，输入接口电路如图2所示，输入电流约4mA，当输入电压大于70V时为有效（ON）状态：
110V digital signal of braking control unit adopts photoelectric isolation input mode, and input interface circuit is shown in Fig. 2, where input current is about 4ma, when input voltage is higher than 70V, it is effective (ON) state:
数字量 Digital quantity
输入信号 Input signal
数字量 Digital quantity
输入地线 Input grounding
逻辑信号输出 Logic signal output
图2 数字量输入接口电路
Fig.2 Digital input interface circuit
2.2 PWM输入电路 PWM input circuit
PWM输入信号采用高速光电集成电路隔离输入（见图3），输入电阻大于2仟欧。
PWM input signal adopts high speed optoelectronic IC isolation input (see Fig.3) with input resistance more than 2 kilo-ohm.
PWM+输入 PWM+ input
PWM-输入 PWM-input
逻辑信号输出 Logic signal output
图3 PWM输入接口电路
Fig.3 PWM input interface circuit
2.3 PWM输出电路 PWM output circuit
PWM输出采用推挽式输出（见图4），负载电阻应大于1仟欧。PWM output adopts push-pull output (see Fig.4), the loading resistance shall be more than 1 kilo-ohm.
PWM信号输出 PWM signal output
图4 PWM输出接口电路
Fig.4 PWM output interface circuit
2.4 PWM信号电气特性 PWM signal electric performances
PWM的波形和占空比定义如图5所示：PWM waveform and definition of duty ratio are shown in Fig.5:
占空比(%)=T1/T2×100 Duty ratio (%) =T1/T2×100
图5 PWM波形及占空比定义
Fig.5 PWM waveform and definition of duty ratio
3. 数字量输入信号说明 Description for digital input signal
由牵引控制系统输入的各数字量信号功能如下：Functions of all digital signals from traction control system are as follows:
再生制动有效信号(298线)：298线为高电平时表示再生制动或电阻制动工作正常，空气制动系统应按电制动反馈信号进行混合制动控制；
Effective signal of regenerative brake (298-line): when 298-line is at high level, it indicates normal regenerative brake or resistance brake, air brake system shall implement combined braking control according to electric braking feedback signal;
? 再生制动衰退信号(29A线)：29A线为高电平时表示电力制动力即将开始下降，空气制动系统要准备补足空气制动力；
Decay signal of regenerative brake (29A-line): 29A-line in high level indicates electric braking force will start descent, and air brake system shall prepare to complement air braking force;
? 反向超速信号 (297线)：297线为高电平时表示列车反向牵引运行超速，空气制动系统应施加最大常用空气制动力；
Reverse overspeed signal (297-line): 297-line in high level indicates reverse traction overspeed of the train, and air brake system shall apply maximum common air braking force;
4. 电制动请 |
