How Does the Battery Electric Locomotive with Frequency Control Work?
The battery electric locomotive with frequency control employs a variable frequency motor, which is an AC motor requiring an AC power source. However, the battery supplies direct current (DC) rather than alternating current (AC). So, how does the electric locomotive utilize frequency control to operate the variable frequency traction motor?
To utilize a variable frequency traction motor, an inverter is installed to convert the DC power from the battery into AC power, which is then supplied to the variable frequency traction motor. Now, one might wonder about the presence of the inverter, as it hasn't been explicitly mentioned in our previous discussions on the structure of battery electric locomotives. So, where is it?
In reality, the inverter for battery electric locomotives with frequency control is integrated into the controller. The controller used in these electric locomotives is the BNJ series inverter, which primarily functions to control the electric locomotive's operations without specifically highlighting its role as an inverter.
This setup enables the battery electric locomotive, powered by DC from the battery, to effectively utilize a variable frequency traction motor, demonstrating the versatility and efficiency of modern electric locomotive technology.
