SU377752A1 - METHOD OF MANAGING A GROUP OF PULSE CONTROLLERS - Google Patents

Description

one

Methods are known for controlling a group of pulse controllers synchronized with each other with a mutual phase shift and with an independent change in the duty cycle of the voltage pulses on the load of each controller separately.

A disadvantage of the known methods of controlling a group of pulsed regulators is the invariance of the phase angle between the regulators, which does not allow to increase the resulting power factor of the regulators over the entire range of variation of the duty cycle.

In order to increase the resulting power factor of a group of regulators by the proposed method, synchronization is performed by alternately sequential switching on of subsequent regulators when disconnecting the previous regulators.

FIG. 1 is a diagram of one of the possible options for implementing the proposed method of controlling a group consisting of two pulse controllers; in fig. 2 shows current diagrams for parallel operation of two regulators.

One of the group regulators operates with the required output ratio of the output voltage independently of the other regulator (see Fig. 2a) and is the leading one with respect to the subsequent} regulator. Second regulator

It also works with independent variation of the output voltage ratio. However, the moments of its activation are rigidly synchronized with the moments of disconnection of the first controller (see Fig. 26), therefore, it is slave with respect to the first controller. It is also possible to synchronize the time of switching off the slaves with the moments of switching on the master controllers. In both

In these cases, the diagram of the resulting current consumption looks like "a fig. 2c.

If the group consists of several controllers, the synchronization is performed by alternately-sequential switching on of subsequent controllers when the previous controllers are disconnected.

Synchronization of each subsequent controller with the previous controller MAY be implemented using a flexible connection.

The group consists of two identical relay regulators} and 2, each of which contains a source of 3 DC or AC power from which the loads 4 are fed; switches 5 of alternating or direct current, voltage, current or power sensors 6 with inertial or integrating outputs, drivers 7, comparison nodes 8, relay elements 9,

flexible links 10 and 11.

This group of regulators (see FIG. 1) is controlled as follows.

The first regulator operates independently in both the duty ratio and phase. An independent change in the duty cycle of the voltage pulses at the load is made by changing the constant signal at the output of the driver 7. If there is no signal from the driver 7, relay 9 is turned off, the signal to switch 5 is not received, the key is in the disabled state. If there is a constant signal from the driver's setting, the relay and the key are turned on, the voltage, current or power at the output of switch 5 is measured by the inertia sensor 6. The signal at the output of sensor 6 increases according to integral, exponential or other laws ( 6).

When the signal from the sensor exceeds the signal from driver 7 by the value of the release threshold of relay 9, the relay turns off key 5. The signal at the output of sensor 6 begins to fade out. When the signal from driver 7 exceeds the signal from sensor 6 by the threshold value of relay 6, the relay will turn on key 5. In the following, the self-oscillating process starts. The duty cycle of the voltage pulses at the load is determined by the value of the constant signal from the output of the driver 7.

Bending can be one-way. Since the duty cycle of the output voltage of the second regulator 2 is determined by the constant components of the signals from links 7

and 10, and only a variable signal is received from link 10, the introduction of the flexible link 10 does not affect the control ratio of the second controller. However, the moment the key 5 of the second controller is turned off is determined by the state of the key 5 of the first controller. At the moment when the relay 9 of the first regulator is turned on, a signal appears at the output of the flexible communication 10, which, adding to the signal of the sensor 6 of the second controller, turns off the relay 9 and, therefore, the key 5 of the second controller.

Flexible communications can be two-way (see Fig. 1, Dotted Line). Flexible linking sites are not the only ones.

Subject invention

A method of controlling a group of pulse controllers synchronized with each other with a mutual phase shift and with an independent change in the pulse duty cycle; the voltage on the load of each controller separately, characterized in that, in order to increase the resulting power factor of the group of controllers, -sequential inclusion of subsequent controllers when disabling previous controllers.

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