SU987779A1 - Gate-type converter control device - Google Patents

Description

(W) DEVICE FOR VENTILATION MANAGEMENT

 one

The invention relates to electrical engineering and can be used in control systems for valve converters (VP).

A valve converter control device is known that is used to control a DC electric drive that contains a valve converter with adaptive current regulators, and which, depending on the converter operating mode, the relay current controller structure is adjusted depending on the nature of the motor current (necessary to ensure quality). adjusting the current and speed in both continuous and intermittent motor currents). In the discontinuous current mode (at the time of the dead time), the current regulator is an integral link, and in the continuous current mode the proportional-integral link tl 3 CONVERTER

This provides a linearization of the characteristics of the VP in the discontinuous current mode, however, the adaptive re; Gultor operates in the pulse-width modulated switching mode, thus being a self-adjusting correction element (with correction of parameters in the current function) with a lag in the self-tuning on

Q period of discreteness of VP, reducing the speed of the latter. In addition, these drives are difficult to configure at the point of the boundary current mode.

15. The closest to the proposed technical essence and the achieved result is a device containing single-phase rectifiers, outputs connected to the inputs of the respective integrators, zero-bodies, first inputs connected to the outputs of the corresponding integrators, and outputs to the corresponding inputs of the distributor, interrupt sensor of the mode , the input connected to the second output of the power unit, and the output to the control input of the intermittent key, the adder, the first and second inputs of the connected corresponding continuously to the sources of the control signal and the base voltage, and the third input - to the output mode of the prairie .yistogo key, and output - to the second inputs of zero-C bodies 2 March.

A disadvantage of the known device is that if the integration node is zeroed out, parasitic oscillations occur in the correction loop.

The purpose of the invention is to increase reliability ..

This goal is achieved by the fact that the device is supplied with a phase-sensitive demodulator, an integrating amplifier, a diode and a load current sensor with a rectifier output, the rectifier output being connected to the first input of the integrating amplifier, the phase-sensitive demodulator having inputs connected to the reference signal sources and switching signal, and by the output to the second input of the integrating amplifier, the diode is switched on by a meukda by the input of a switch of the intermittent mode and the output of the integrating amplifier. FIG. 1 represents an uncirc. the scheme of the proposed device; in fig. 2 - stress diagrams at various points of this circuit. The device contains single-phase direct switches 1, integrators 2, null organs 3, serially connected distributor k, valve converter 5, load 6 and shunt 7, phase-sensitive demodulator 8, load current sensor with rectifier 9, integrating amplifier 10, diode 11 , key 12 intermittent mode, sensor 13 intermittent mode and adder k. The device works as follows. A half wave, for example, the phase A of the mains voltage Ud, from the single-phase rectifier 1 is fed to the input of the integrator 2. The signal CD is integrated in the course of each half-period. In case of equality of the voltage of the integrator 2 and the resultant voltage of the adder, a control pulse appears at the output of the null organ 3, which through the distributor V controls the power frequent. At the same time in the load circuit 6

and shunt 7 at the signal UjpCUg) from the phase-sensitive demodulator 8 {FIG. 2a), a current flows to which the output of the load current sensor with rectifier 9 corresponds to a signal

Ug (Fig. 26). U signal difference

in and Ug is integrated by the integrating amplifier 10, the output signal to

Secondly (Fig. 2c), the diode 11 then goes through a discontinuous mode switch 12 controlled by a signal U (Fig. 2d) from a discontinuous mode sensor 13 connected to the valve converter 5. Correction signal

5 and 2, (Fig. 2d), after the switch 12 of the discontinuous mode, is supplied to one of the inputs of the adder I, to the other inputs of which the signals of the basic control voltage Well are connected,

Claims (2)

1.TecHnlske MIttellungen AEG telefunken 59, IP 6. 19b9, p. . 2. USSR author's certificate, If 572892, cl, H 02 R 13 / t6, 1971. ut.i fef