With the rapid development of the rail transit industry, the importance of current sensors is becoming increasingly prominent. It plays a crucial role in various systems of rail transit and has become an important component in ensuring the safe and efficient operation of rail transit.
For example, the CHIPSENSE CM6A B00 is a closed-loop current sensor based on the Hall principle, with a range of 0-1000A, a working voltage of 24V, an accuracy of 0.4%, a response time of 0.5µs, and an output signal of current. The maximum operating temperature is -40~85°C. Widely used in single or triple inverters, traction converters, auxiliary converters, battery charging and discharging, brake choppers, subways and other fields.
1.Traction system
In the traction system of rail transit, current sensors are used to monitor the current of traction motors. By monitoring the working current of the motor in real-time, precise control of the motor can be achieved, improving its operational efficiency and reliability. At the same time, the current sensor can also detect the fault current of the motor, such as overcurrent, short circuit, etc., and trigger the protection device in a timely manner to prevent motor damage and ensure the safe operation of the train.
2.Auxiliary power supply system
The auxiliary power system of rail transit provides power for various auxiliary equipment on the train, such as lighting, air conditioning, broadcasting, etc. Current sensors are used in auxiliary power systems to monitor the output current of the power supply and ensure the normal operation of auxiliary equipment. When the auxiliary power system malfunctions, the current sensor can detect abnormal currents in a timely manner, providing a basis for fault diagnosis and maintenance.
3.Braking system
The braking system is an important guarantee for the safety of rail transit. Current sensors are used in the braking system to monitor the current of the braking resistor, in order to control the braking power and ensure the safety and reliability of the train during the braking process. In addition, the current sensor can also detect the fault current of the braking system, such as overheating or short circuit of the braking resistor, and trigger the alarm device in a timely manner to remind the staff to carry out maintenance.
4.Signal system
The signal system of rail transit requires accurate current information to achieve control and scheduling of trains. Current sensors are used in signal systems to monitor the operating current of signal equipment and ensure its normal operation. At the same time, current sensors can also provide fault diagnosis information for signal systems, improving the reliability and safety of signal systems.
Current sensors have broad application prospects in the rail transit industry. It provides important technical support for the safe, stable, and efficient operation of the rail transit system. With the continuous advancement of technology, current sensors will play a more important role in the field of rail transit.
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