SU404069A1 - PERMANENT STABILIZED CONVERTER - Google Patents

Description

one

In the well-known stabilized DC / DC converter, containing a controllable key connected to the nervous winding of Tranoformatora. The secondary winding with a midpoint of which is connected to its extreme terminals via two-voltage rectifier diodes with a choke LC filter and a feedback circuit, The constant component magnetisation of the transformer core depends on the load current.

To reduce the dependence of the constant component of the biasing of the transformer core on the load current, one of the rectifier diodes of the proposed converter is connected to the common point of connection between the throttle and the filter capacitor by the output electrode.

The drawing shows a diagram of the proposed device.

The operation of the device is as follows.

In the period of time 7i, a pulse is received from the feedback circuit 1, which closes key 2. At the same time, a voltage is applied to the winding 3 of the transformer 4, which opens the diode 5. The diode 6 is closed at this time by the negative voltage that comes from the winding 7 of the transformer 4. V during this time, the transfer of the power supply and load 8

through diode 5 and choke 9 and. the accumulation of electromagnetic energy in the transformer 4.

With the start of the time period TZ, the pulse from feedback circuit 1 ends, and the key

2 is opened by turning off the current in the primary winding 10 of the transformer 4. Under the influence of electromagnetic energy stored in the transformer 4 during the period Ti, the field on all windings of the transformer changes. The diode 5 is closed, and the diode 6 is opened, and the voltage on the winding 7 becomes equal to the voltage on the storage capacitor 111. The voltages on the remaining windings of the transformer 4 will be determined

the voltage of the capacitor 11 and the ratio of the number of turns and the number of turns of the winding 10. Next, the transfer of energy stored in the transformer through diode 6 to the load 8 begins. At the same time, after closing

diode 5 under the influence of emf self-induction a polarity change occurs at the choke 9, as a result of which diode 12 is opened and the energy stored in the choke 9 is transferred to the load.

The ratio of the turns of the windings of the transformer 4 and the duty cycle of the control pulses are chosen so that by the time of the next closure of the key 2, all the energy stored in the transformer 4 has time to be completely transferred to the load 8 and the transformer 4 is completely de-energized.

With the MO-ViLHTa of the next. Gammichn to Pic 2, all the described processes are repeated.

The control of the duty cycle of the key 2 impulses provides for the adjustment and stabilization of the output on the right-hand side of the stabilized averaged transform S-lnrn to change to the network load current n.

The constant magnetization of the core of the Psfor m-ator 4 is reduced at the high voltage of 7 1 diode 6.

Subject invention

Stabilized constant voltage converter, containing iGg control. The key is connected to the primary winding of the transformer, the secondary winding of which is connected to the middle point with its extreme B1) 1 diode through diode 1 | a full-wave rectifier with a C1-lazy / S-filter choke, and a feedback circuit that differs in that, in order to reduce the dependence of the constant component of the biasing of the transformer core on the load current, one of the rectifier diodes is connected with its output electrode to the common point of connection between the throttle and filter coaxial.

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