The battery electric locomotive has three options for speed regulation. If the workplace is a coal mine, which speed regulation method is better for battery electric locomotives?
First of all, let's take a look at the three speed regulation methods of battery electric locomotives, which are resistance speed regulation, chopper speed regulation and frequency conversion speed regulation.
Resistance speed regulation is a step-by-step speed regulation that controls the speed by changing the resistance value. The control process of speed regulation and commutation is completed by the contact between the copper contacts and the commutation drum. Not only is it easy to generate sparks, but there are certain safety hazards in mines where there is gas. In addition, the method of resistance speed regulation consumes more energy, and the cruising range of the battery may be reduced.
The chopper speed regulation and frequency conversion speed regulation are stepless speed regulation. The former is to control the battery electric locomotive by controlling the size of the current. The latter is to control the battery electric locomotive by changing the current frequency after changing the direct current into alternating current. Both of they are safer and more energy-saving than resistance speed regulation.
Therefore, it is better to choose the chopper speed regulation or frequency speed regulation method when the battery electric locomotive is used in the coal mine.
