SU1704251A1 - Ac/ac converter - Google Patents

Abstract

The invention relates to a converter technique. The purpose of the invention is to expand the range of control and scope. At the end of each half-cycle of the supply voltage, using the capacitor-zeroing unit 9, the time of the driving RC-chain is fully discharged to the capacitor 10. Due to this, the entire turn-on angle of the power thyristor 2 is proportional to the setpoint voltage. An additional rectifier 3 distinguishes between the circuits of the power thyristor control circuit 6 and the load circuit. 3 il.

Description

 366

540

720 &

but

Fig 3

3%

4th

Claims (1)

Claim An AC voltage converter containing series-connected terminals for connecting a power source, a bridge rectifier and terminals for connecting a load, a thyristor connected to the DC diagonal circuit of a bridge rectifier, a circuit from a series of input terminals of a voltage regulator and a current-limiting resistor, while the output of the voltage regulator the input of the power thyristor control signal generator is connected, which contains a time-varying RC-circuit sequentially, the source of the reference voltage and the emitter-collector junction of the first transistor, the base of which is connected to a common point of the timing RC circuit, differing from that. that, in order to expand the regulation range and scope, an additional bridge rectifier has been introduced, the AC output of which has been connected to the terminals for connecting! · the power is exhausted ··, and the terminal ends of the circuit are connected to its current terminals ποοτο ιιιηηοιο connected to the current лю · щ щ:: ;; e resistor and input outputs of the voltage regulator, a low-power thyristor, a pulse transformer and a zeroing unit, a power transition of a low-power thyristor are introduced into the driver of the power thyristor control signals and the primary winding of the pulse transformer forms a serial circuit connected to the output of the voltage stabilizer, the secondary winding of the pulse transformer generates the output heights9 of the thyristor control signal generator and is connected to its control Г, the passage controlling the output of low-power! Iristor is connected to the collector of the first transistor, the zeroing unit contains a diode, the second transistor, capacitor and resistor, while the resistor of the zeroing unit is connected in parallel with the output of the voltage stabilizer, capacitor 5, the zeroing node is connected in parallel to the N-chain, the emitter-collector junction of the second transistor is connected between the free output of the capacitor, the time of the master RC circuit and the base of the transistor 10, the base of the second transistor is connected to the common point of the resistor and the anode of the zeroing node, the diode cathode is connected to the emitter of the second transistor , the conclusions of the capacitor and the resistor of the nulling assembly 15 not connected to the diode are combined.