FIELD: electricity.
SUBSTANCE: an inverter circuit is claimed and meant for verification of inductive electricity meters. It comprises of a line-voltage rectifier on series-connected high-current pulse diode and electrolyte condenser of a high capacity C which is calculated by the formula C≈T/2η(1+η)R, where T is AC cycle provided that the ratio η of the charging time to the discharging time of the electrolyte condenser is many times greater than one, e.g. 0.01 and less, where R is the load resistance characterized in that an additional rectifier, which is identical to said one for another half-wave of the AC current, is introduced into it. The both series-connected electrolyte high-capacity condensers are connected to collectors of series-connected power transistors of n-p-n and p-n-p types respectively. Their emitters are coupled with the midpoint of the electrolyte high-capacity condensers through a throttle which forms the line-voltage output for load R. The throttle is connected to a film-type condenser. Both, the throttle and the condenser, form an oscillating contour tuned to the line-voltage frequency (e.g. 50 Hz). Herein the control of the power transistors is performed by the connection of a step-down winding of a small-power transformer to their 'base-emitter' junctions. The transformer is linked to the input terminals and the power pulse diodes of the double-wave rectifier shall be designed for the pulse current amplitude IPUL MAX≈IN/η, where IN is the nominal load current with the resistance R.
EFFECT: construction of an inverter circuit of a device where the rectified voltage is converted by simple means into an AC voltage of 220 V.
3 dwg
