SU561273A1 - Device for controlling asymmetric three-phase rectifier - Google Patents

Description

one

The invention relates to devices for charging batteries and to be used in mobile vehicles and in other industries.

There are known devices for controlling an asymmetric three-phase rectifier used to regulate the current of the batteries 1, p.

Such devices have three control channels for power thyristors containing a power transformer, a parametric voltage regulator, and a pulse shaper.

However, the device does not provide a reliable unlocking angle of the power thyristors in the range from zero to 180 ° and reduces the power factor of the rectifier.

The closest in technical essence and the achieved result to the proposed invention is a device containing three control channels for power thyristors, single-phase transformers with rectifiers 1, voltage regulators and pulse shapers 3j.

The disadvantage of such a device is that the circuit diagrams are not large, as a result of which the phase transformers of each channel have three secondary windings, besides, four are used to provide phase shifting: the power supply source is a stabilized voltage source, the power source of the locking member is used: control voltage source and source of phase voltages, 0, for controlling thyristors, additional amplifier stages are required, which are connected to the melody by the fixing body 1} power thyristor .

The purpose of the invention is to simplify the front panel device. control of asymmetrical bridging rectifier.

Claims (3)

For this, the device is equipped with two resolving thyristors, and the control electrode — the cathode of the resolving thyristor of the second channel — is connected to the secondary winding of the output transformer of the shape of a catheter and the first channel, and the control electrode — the cathode of the resolving thyristor of the third channel is connected to the secondary winding of the output transformer of the pulse former the second channel, in addition to stabilizing the amplitude and duration. the output pulses, the common point of connection of the capacitor and the thyristor source of the pulse former is connected to the output of the stabilizer, the voltage. In FIG. 1 shows a control circuit for an asymmetric three-phase rectifier for charging a battery ;; in fig. 2 shows timing diagrams of the output voltage of the power supply and the output pulses of the cxeNfbi control. , The control of an asymmetrical three-phase rectifier for charging a battery-sozhai-ia.t. three single-phase power transformers 1,2, 3 with single half-cycle 4.5, 6 and full-time oscillators These are diodes 11, 12, stabilizers 13, thyristor pulse formers 14, and resolution thyristors 15, 16. Thyristor pulse shaper 14 contains a pulse shaper capacitor 17, a thyristor 18, a pulse transformer 19, a resistor 20, a capacitor 21, a diode 22, a distor 23. The circuit works as follows. The unlocking angle of the power thyristors is set by the resistor 20 in charge. RC. circuit 2O, 21 of the first channel (phase A). The voltage of the full-wave rectifier 9-1O of the second Canada (phase B) and the one-time period rectifier 4 phase A is fed to the input of the stabilizer 13 of the channel of phase A, thereby providing the charge of the capacitor 21 through a resistor 20 in the interval from 0 to 300 el. hail. Simultaneously with the on-line charge of the capacitor 21 of the RC circuit, the voltage from the output of the stabilizer 13 is applied to the capacitor 17. When a voltage across the capacitor 21 is equal to the switching voltage of the distor 23, the latter turns on and opens the thyristor 18, through which a capacitor 17 and a capacitor 21 are attached to the primary winding; the output transformer 19 of the pulse shaper, from the secondary winding of which the pulses are fed to the control ejectrode-cathode of the force-thyristor of phase A of the asymmetrical bridge. Simultaneously, the pulse from the secondary winding of the output transformer 19 of the channel of phase A is supplied to the control electrode-cathode of the resolving thyristor 15 of channel of phase B. The stabilizer of phase 13 of the power supply B, from the full-wave rectifier 7-8 of phase A and the single-cycle rectifier 5 of phase B through the resolving thyristor 15, and the stabilizer 13 in the third channel (phase c) is powered by a full-wave rectifier 9-10 of phase B and a half-wave rectifier 6 of phase C via resolution thyristor 16, whose control electrode I is connected to the secondary one. winding; output pulse transform-t. the channel of the phase B channel. Channels B and C work similarly to channel A. The proposed device for controlling an unbalanced rectifier simplifies the overall control scheme, provides reliable support of thyristors while stabilizing the amplitude and duration of the output control pulses in the control range up to 300 el-degrees, and Tefyi most of all, it allows to set the battery charge current from zero to nominal time. Claim 1. A device for controlling an asymmetrical three-phase rectifier for charging a battery, comprising three control channels, which consist of single-phase power transformers with rectifiers, voltage stabilizers and pulse shapers, which are that, in order to simplify the device ;, with a range of adjustment from 0 to 2 9 hail, inclusive, it is additionally equipped with two resolving thyristors in the second and third control channel, and the control electrode-cathode of the resolving thyristor of the second channel is connected to the secondary winding of the output transformer of the first channel pulse former, and the control electrode-cathode of the resolving thyristor of the third channel is connected to the common winding the output track of the format of the pulse former of the second channel. 2, The apparatus of claim 1, wherein, in order to stabilize the amplitude and duration of the output control pulses, the common connection point of the capacitor and the anode of the thyristor of the pulse former is connected to the output of the voltage regulator. Sources of information taken into account during the examination: 1. Zorohovich A. E., Velsky V. P., Eigel F. I. 1 Devices for charging and discharging batteries. M, Energie, 1975, p. 130. 2.Avtorsoke certificate of the USSR No. 428519, 2 And 02 R 13/16, 1974. 3. Yesterday P. P. Modern control systems of valves. Works One of the All-Union Conference on Automation of the Electric Drive, vol. 3. FIG. one .-K / TNT / , Lij 9 , x2 FIG. g