SU577637A1 - Device for controlling power diode converter - Google Patents

Description

ii ieo6pa3 () n; igel, voltage setting device and load voltage sensor., additionally equipped with a minimizer, one input of which is connected to the output of the first adder, the second input - with the setting voltage regulator, the output of another input of the second adder, and the first The adder is connected to the voltage sensor at the load so that the cable, l feedback 1) 0 voltage at the load is positive.

The drawing shows a block diagram of the proposed device.

The device contains a controlled rectifier 1 with a control unit 2, the first adder 3, the inputs of which are connected to the current setting device 4, the current sensor 5 and the voltage sensor 6 at the load 7, which is connected to the output of the rectifier 1 through the smoothing reactor 8. The adder 3 receives a signal at one of the inputs of the minimizer 9, to the other input of which the voltage adjuster 10 is connected. The output of the minimizer 9 is connected to the first of the inputs of the second adder 11, to the other input of which the output voltage sensor 12 is connected, and the output of the adder 1 1 is connected to the input of the control unit.

The device works as follows.

At the output of the adder 3, a differential signal is generated from the signals of the current setting device 4, the current sensor 5 and the voltage sensor 6 at the load 7, which is fed to one of the inputs of the minimizer 9. The other input of the minimizer receives a signal from the voltage setting device 10. In static modes, the ripple of the output signals of current sensor 5 and voltage sensor 6 are insignificant.

The minimizer operates in such a way that at its output a signal is generated that is equal to the smaller signal arriving at its turns. Suppose that the controlled rectifier 1 is also operating in the output voltage stabilization mode. Then, the input of the adder 11 from the minimizer 9 receives a signal equal to the signal at the output of the voltage setting device 10, and the output of the adder 11 will be a difference signal between the voltage setting device 10 and the signal from the output voltage sensor 12. This differential signal is then post-dropped in the rectifier control unit 2.

If the load current is less than the current determined by the signal of the current setting device 4, the rectifier operates in the stabilization mode of the output voltage U, -. In the mode of stabilization of the output current 1 (for example, with a short shut-down after the smoothing reactor 8), the signal from the voltage sensor 6 is reduced, and the difference signal at the output of the adder

3 becomes the setting signal MeHb.nje of the setting signal 10 ngf; and When hg.m. on the minimizer of torus 9 there will be a signal equal to the difference signal at the output of the adder 3, which together with the voltage sensor signal 12 will flow

to the input of the control unit 2 rectifier. When the load changes, the signal at the output of the voltage sensor 6 will change, and the signal at the output of the current sensor 5 remains constant, which allows a significant increase in output.

device speed.

When the load changes, as well as the signals at the outputs of the current setting device 4 and the voltage setting device 10, a smooth transition takes place (depending on the magnitude of the signals at the output of the summator 3 and the voltage setting device 10)

from the voltage stabilization mode. At the output of the valve converter to the current stabilization mode.

The absence of filters in the current feedback and voltage circuits on the load of the relay and logic elements will increase the speed and reliability of the device operation.

Claims (2)

1. Pisarev A, L., Detkin L.P. Management of thyristor transforms. Mp. M., “Energie, 1975, p. 108, fig. 3 - fj. 2. USSR author's certificate number 4 (W43o, k, 1. H 02 M 7/02, 1975.