SU535713A1 - Method-inverse voltage control on two loads - Google Patents

Description

a further reduction in voltage at load 2 by an amount equal to:

(g

.

2

Then the average values of the stresses on the loads 1, 2 will be respectively equal to:

Ui U, + W

t / 2 f /, -.

FIG. 2 t / i and Uz are shown with a thin dashed line.

Thus, an increase in the duration of the connected state of one load during a period with a corresponding decrease in the duration of the switched on state of another load leads to simultaneous symmetrical regulation in opposite directions of average values of the stresses on these loads, i.e., to inverse regulation. Simultaneously changing the duration of the on state in cases from O to G for one load and from G to O for another load allows you to change the average value of the voltage on one load from O to UA, while changing the voltage from A to O to other and vice versa.

FIG. Figure 3 shows the regulation characteristics of the proposed method for regulating the voltage on two loads, i.e., the dependence of the voltage on the loads on the ratio of the time of their on state.

A simultaneous increase (decrease) in the voltage on both loads can be achieved by increasing (decreasing) the voltage value of the power supply source UA, which

significantly expands the capabilities of the proposed method. The adjustment characteristics for this case are shown in FIG. 3 dotted line.

5 The proposed method of regulation provides linear adjustment characteristics, which allows to dry, allow more accurate and high-quality voltage regulation on two loads. The application of the proposed method for leveling the speeds and currents of twin-engine and two core electric drives, which are increasingly developed and spread, will increase the service life of electrical

5 cars and increase their productivity. The invention can be applied in almost all metallurgical and large machine-building enterprises of the country.

Claims (1)

Invention Formula A method of inverse voltage regulation on two loads supplied by an adjustable voltage by increasing the average value of the voltage on one load and simultaneously reducing the same voltage on the other load, characterized in that, in order to ensure the linearity of the control characteristics, the loads periodically the specified switching voltage is alternately applied to the selected switching frequency, and during the switching period the time of the connected state of one load is equal to the time off th other load state, and vice versa, and the total time of the connected state of the two loads equal the switching frequency period duration. Mr. , v: l ir, v