Electromagnetic pump compensation power supply apparatus and electromagnetic pump system

摘要

Provided, in parallel to an electromagnetic pump in a power supply system, is an electromagnetic pump compensation power supply mechanism (10) that will perform a power-factor improving function as a synchronous machine during normal operation of a plant. The electromagnetic pump compensation power supply mechanism (10) is provided with an exciter stator permanent magnetic apparatus (45) that can switch an exciter between a non-excited state and an excited state. The exciter stator permanent magnet apparatus (45) comprises exciter stator permanent magnets (15a), springs (16) that apply force to the exciter stator permanent magnets (15a) towards positions facing an exciter rotor winding (15b), and electromagnetic solenoids (20) that make the exciter stator permanent magnets (15a) move to positions not facing the exciter rotor winding (15b) in resistance to the force applied by the springs (16).

主权项

1. An electromagnetic pump compensation power supply apparatus that is electrically connected to an AC power line on a downstream side of a power supply line breaker of a power supply unit of an electromagnetic pump, improves a power factor during normal operation, and supplies power to the electromagnetic pump at a time of loss of AC power supply to the electromagnetic pump, the electromagnetic pump compensation power supply apparatus comprising:
a rotor shaft that rotates around an axis; a flywheel that stores rotation energy and is fixed to the rotor shaft; an exciter rotor winding that is fixed to the rotor shaft; a rotating rectifier that is fixed to the rotor shaft, and converts alternate current generated on the exciter rotor winding into direct current; a winding type synchronous machine rotor winding that is fixed to the rotor shaft, and receives direct current supplied from the rotating rectifier; a winding type synchronous machine stator winding that is fixed in a stationary manner so as to face the winding type synchronous machine rotor winding, constitutes a winding type synchronous machine along with the winding type synchronous machine rotor winding, and converts rotational energy into electrical energy and electrical energy into rotational energy; an exciter stator permanent magnet apparatus that includes
an exciter stator permanent magnet, which constitutes an exciter along with the exciter rotor winding, and can switch between two states, which are non-excited state and excited state, andan elastic body configured to impart a restoring force to move the exciter stator permanent magnet in a predetermined direction; and a synchronous machine side power supply line that connects the winding type synchronous machine stator winding and the AC power line on a downstream side of the power supply line breaker; and a DC power supply unit that uses, as power source, the same AC power line that is a power source for the electromagnetic pump power supply unit, and is configured to convert alternate current into direct current and configured to supply direct current to a drive mechanism and cut off a supply of the direct current, wherein the drive mechanism is configured to generate an opposing force against the restoring force of the elastic body and to lose the opposing force as the supply of the direct current is cut off.