SU1150713A1 - Controlled energy transformer - Google Patents

Abstract

An ADJUSTABLE ENERGY CONVERTER, containing a matching transformer, the primary winding of which is connected to an AC network, and is second through an uncontrolled driver and a control switch with a load, the control input of the regulator switch is connected to the current sensor through a pulse source, connected to a load current sensor, through a pulse controller connected to a load current sensor, through a pulse controller connected to a load current sensor, through a pulse controller connected to a load current sensor, a primary switch connected to the control current switch, connected to an AC key, connected to a load current, connected to a load control device. that, in order to improve the mass and size parameters, an inverter was introduced, driven by a network, connected to the secondary winding of a matching transformer, and output to the connection point Lyucha et seq load. SP about with

Description

The invention relates to electrical engineering, in particular, to devices for converting alternating current energy to direct current energy and can be used, for example, in a controlled electric drive. A power converter is known, which contains an output switch and a bridge switch, which is active on a set of controlled gates and four diodes. The energy converter allows the load to be supplied with a bipolar current. To supply the load with a unipolar current in a known converter, it is sufficient to use half of the bridge switch — two controllable valves and two diodes (11. The disadvantage of the known energy converter is the increased complexity due to the large number of controllable valves. The closest to the invention is an adjustable converter contains a matching transformer, the primary winding of which is connected to the AC network, and the secondary winding through an uncontrolled actuator and regulating A load key, a control input of a control key are connected to a load current sensor through a pulse controller 2. The drawback of this device is poor weight and size indicators. The purpose of the invention is to improve weight and size parameters. energy, containing a matching transformer, the primary winding of which is connected to the AC network, and the secondary through an uncontrolled rectifier and regulating switch with a load, control input regul lating pulse wrench through regulAtor associated with probe heating current ki, introduced inverter slave network connecting the input of the secondary k "Otke matching transformer, and the output - to the point of connection regulirzposchego key and load. Figure 1 shows an electrical circuit of an adjustable energy converter; FIG. 2 is a diagram of a pulse controller; FIG. 3 shows time diagrams of the device operation. The regulated energy converter contains a matching transformer 1, the primary winding 2 of which is connected to the AC network, and the secondary winding 3 through an uncontrolled terminal 4 and the regulating switch 5 - with the load 6. The control input of the regulating switch 5 is connected via a pulse regulator 7 with a current sensor 8 load. The device contains an inverter 9, a network slave, an input connected to the secondary winding 3 of the matching transformer 1, and an output to the connection point of the regulating switch 5 and the load 6. The inverter 9, driven by the network, contains thyristors 10-12. The pulse controller 7 (Fig. 2) is made, for example, in the form of a relay element 13, the input connected to, the output of the comparison unit 14, the first and second inputs of which are connected respectively to the current sensor 8 and the reference signal setting unit (ij). The device works as follows. Control signals for unlocking thyristors 10-12 are sent at the following time intervals: 0-2 and 3 for thyristor 11; - DCG / 3 - for thyristor 12; - 21 - to the thyristor 10 (see Fig. 3, and ", and, and, d). When the device operates in the range of 0-2 and / 3, when the signal at the output of the pulse regulator 7 is equal to 1, the regulating key 5 is open. The output voltage (Fig. 3 c)) of the uncontrolled rectifier A is applied to the load 6, and the load current i (Fig. 3 d)) increases. From the load current sensor 8, the signal is supplied to the comparison unit 1.D (Fig. 2), where it is compared with the reference signal 1l. If these currents are equal (taking into account the threshold of operation of the relay element 13), the signal at the output of the pulse regulator 7 becomes equal to 0. The ill current begins to fall off under the action of the phase voltage of the matching transformer 1, it flows through the thyristor 11. With a decrease in the current 1 c at the output of the pulse the regulator 7 reappears 1 and the control switch 5 connects the load 6 to the power source. In other time intervals, the processes are similar. In the case of work load 6 in the generator mode, the proposed

the device generates a load current with the return of energy to the primary network.

Thus, the invention allows for good adjustment.

performance when working on the motor and generator loads with good weight and size indicators.

- / I /

four-

at

(rig 2

Claims (1)

ADJUSTABLE ENERGY CONVERTER, comprising a matching transformer, the primary winding of which is connected to an AC network, and the secondary through an uncontrolled rectifier and a control key with a load, the control input of the control key through a pulse regulator is connected to a load current sensor, characterized in that, in order to improve the overall size indicators, an inverter driven by a network is introduced, with an input connected to the secondary winding of the matching transformer, and with an output - to the connection point of the control key and load. <Put.1 SU. · "1150713 1,150,713