The battery electric mining locomotive is a major category of mine electric locomotives. The main working energy of this electric locomotive is converted by the battery, and this kind of electric locomotive has better stability. Therefore, this kind of electric locomotive has a wider range of use, and its good traction performance can meet the traction required by the locomotive, which can make the vehicle more powerful.
Recently, the CT series explosion-proof special AC traction electric locomotive developed by our company passed the coal safety on-site review, obtained the mining product safety mark certificate, and went into production smoothly. Compared with the traditional DC traction electric locomotive of CT series explosion-proof special AC traction electric locomotive:
1. The applicable environment is wider.
2. Higher reliability The locomotive of this system adopts a three-phase AC asynchronous motor. Because the motor has no coil and commutating copper head on the rotor, it is not easy to be damaged. In addition, the master controller has no contact wear.
3. Better traction performance. When starting at low frequency (1HZ), the starting torque can reach 300% of the rated value, which can make the AC asynchronous motor reach and exceed the starting torque and traction characteristics of the DC motor, and its traction is the same as that of the ordinary DC motor vehicle. 1.6 times. Satisfy the maximum starting traction of the locomotive at low speed, making the locomotive start with heavy load strong and powerful.
4. Stronger climbing ability The climbing ability of ordinary DC lithium battery electric locomotives is 11‰, and the climbing ability of locomotives using AC frequency conversion speed regulation system is 60‰. Under the same adhesion conditions, the AC traction variable frequency speed regulation vehicle can run on the line gradient that cannot go on the DC vehicle.
5. Better speed regulation performance. Use stepless uniform speed regulation, high precision, the lowest adjustable frequency is 1HZ, and the lowest adjustable speed is 0.5r/min.
The speed can be preset. Once a certain vehicle speed is set, it will not exceed the set value even when driving downhill, which can avoid accidents caused by overspeed and is safe and reliable. The frequency increase time is 5 seconds, even if the driver suddenly accelerates, the locomotive still increases to the maximum value in 5 seconds.
Mine-used lithium battery electric locomotive is an important transportation tool in underground production. For decades, series-excited DC motors have been used for speed control. This method of speed regulation not only consumes high energy, low efficiency, and large maintenance, but also causes a series of problems such as excessive sparks and short circuits due to the contact wear of the commutator and carbon brush, which causes the motor to burn out due to excessive temperature rise The security is not guaranteed. As users attach importance to safe production and energy saving, traditional DC traction electric locomotives can no longer meet the needs of use, and it is imperative that AC traction replace DC traction.
