Advantages of DC Chopper Speed Regulator for Explosion-proof Battery Locomotive

The advantages of DC chopper speed control locomotive controller for explosion-proof battery electric locomotive may not be well understood. As an important part of the group leader of explosion-proof battery electric locomotive accessories, DC motor has always been the majority of its excellent linear characteristics, excellent control performance and other characteristics. Optimum choice of digital variable speed motion control and closed-loop position driver control system.

Now let's look at the advantages of DC chopper speed control locomotive controller.

Especially with the development of computer in the field of control, high switching frequency, fully controlled second generation power semiconductor devices, and the application of pulse width modulation (PWM) DC speed regulation technology, DC motor has been widely used. The control methods of DC motor speed can be divided into excitation control method and armature voltage control method. Although the control power of excitation control method is small, it is limited by magnetic saturation at low speed and by commutator spark and structural strength at high speed.

Moreover, the dynamic response of excitation coil is poor because of its large inductance. So the commonly used control method is armature voltage control method, which can change the terminal voltage by adjusting resistance R to achieve the goal of speed regulation. This traditional method of voltage regulation and speed regulation is inefficient.