JPS5649694A - Simulator for instantaneous power failure - Google Patents

Abstract

PURPOSE:To simulate whether the normal operation is performed or not at the instantaneous power failures by adding a circuit which generates the state of instantaneous power failure and the state of the power restoration in a simulated fashion, in a thyristor Scherbius device with an instantaneous power failure countermeasure device. CONSTITUTION:An instantaneous power failure detecting circuit 21, a phase control angle shifting circuit 22, and a zero current detecting circuit 23 are provided on the thyristor Scherbius device containing a wound-rotor type induction motor 1 and a thyristor inverter 3, thereby the countermeasure for the instantaneous power failure and the power restoration are performed. Furthermore, an instantaneous power failure generating circuit 31 which generates the instantaneous power failure state in a simulated fashion and a voltage generating circuit 32 which are generate a transient high voltage at the power restoration are added, and the states of the circuits when they are operated are recorded in a recorder 33 from a measuring point 34. In this constitution, the operations of the instantaneous power failure countermeasure device which are operated several times during one year can be periodically confirmed and the normal state can be always maintained.