The BDG series electric flat cart is a 36V low-voltage rail-powered electric flat transfer car. Its working principle is based on the rail sliding line. The ground step-down transformer control cabinet steps down the single-phase AC 380V to a single 36V safe voltage. After passing the track, it is boosted to a single-phase AC 380V by the onboard step-up transformer. Power is supplied to the flat car with a DC traction motor.
