Abstract: System and methods are disclosed to promote safe shoving movements of a train based on train position localization without human-based track operations monitoring. Train position detectors deployed at the end of a track, in parallel to the track, between the rails of the track, or a combination thereof, localize an end-of-train during shoving movements. Each train position detector transmits an early warning alert to an onboard alert device and a handheld alert device for indicating the end of the train is about to enter a pre-configured prohibited zone. The locomotive operator receives the alert on the onboard alert device while workers in the railyard receive the alert on the handheld alert devices. Both onboard and handheld alert devices are capable of generating audio, visual, haptic, or a combination of these warning alerts for the locomotive operator and the workers in the railyard.

Abstract: A method and apparatus for slowing back spin of a rod string of a progressing cavity pump powered by an electric motor when power is lost. Pulse direct current voltage into the windings of the electric motor powering the progressing cavity pump to magnetize a stator of the electric motor thereby reducing the rotational speed of a rotor of the electric motor and consequently the rotational speed of the back spinning rod string of the progressing cavity pump.