SU1597868A1 - Pulsed d.c.voltage stabilizer - Google Patents

Abstract

The invention relates to electrical engineering and can be used in the construction of secondary power sources. The purpose of the invention is to improve the weight and size parameters. The goal is achieved by demagnetizing the power transformer 4. To do this, a cumulative resistor 15 and a magnetization reversal 14 are introduced into the single-ended converter circuit. The demagnetization is performed on the reverse of the converter. The invention makes it possible to reduce the mass and volume of the power transformer 4 by 35%. 1 il.

Description

The invention relates to electrical equipment and can be used in secondary electrolyte devices .5

The aim of the invention is to improve the weight and size parameters of the stabilizer.

The drawing shows a diagram of the stabilizer. to

The stabilizer contains a primary winding 1, an additional winding 2 and a secondary winding 3 of a transformer 4, a power transistor 5, a rectifier, a sweeping diode 6, a diode 7, a choke 15 8 and a capacitor 9 of the DLC filter 10, a control node 11., a capacitor 12 of the input filter , a cumulative choke 13, a magnetization transistor 14, a limiting resistor 15. 20 The end of the primary winding 1 of the transformer 4 is connected to the collector of the power transistor 5, the emitter of which is connected to the first input terminal. The beginning of the output winding 3 25 is connected to the anode of the rectifying diode 6, the cathode of which is connected via B1., C-filter 10 to the first output terminal. The end of the secondary winding 3 is connected to the second output of your JQ water. The output pins are connected to the input of the control unit 11, the output of which is connected to the control input of the actuator 5.

The beginning of the accumulative droplet 13 is connected to the second input terminal and emitter of the transistor 14 magnetization reversal, the base of which through the limiting resistor 15 is connected to the middle terminal of the accumulative circuit 13. The collector of the transistor 14 magnetization reversal is connected with the beginning of the additional winding 2. 12 . the input filter is connected to the first input terminal.

Pulse stabilizer works as follows.

Pr and open control transistor 5., energy is transmitted through power transformer 4 to the secondary circuit formed by secondary winding 3, rectifying diode 6. DLC-filter 10 and energy accumulation in transformer 4 and storage throttle 13, with the remagnetization transistor 14 is closed. Closing the power transistor 5 changes the polarity of the voltage between

35

The beginning and middle point of the accumulative droplet 13, which opens the magnetizing transistor 14 through the limiting resistor 15. At the same time, the energy stored in the accumulator choke 13 provides the remagnetization of the transformer 4 along the auxiliary winding circuit 2, the collector and the emitter of the magnetizing transistor 14. Moreover, apart from providing the magnetization reversal of the transformer 4, the magnetic choke 13 is partially reversal reversal and then the operation cycle repeats.

The capacitance value of the capacitor 12 is selected from

  , (one)

L with Ifj,

 Ufz

-,

0 5 Q

where L. is the inductance of accumulative droplets 13; I - current through accumulative

choke 13; With ,, - the capacitance of the capacitor 12

input filter; and. - voltage across capacitor

P

12,

five

and the inductance value is determined from the condition of the magnetic reversal of the transformer core 4.

Since the remagnetization of the core of the transformer 4 is carried out in idle mode, when the diode 6 and the transistor 5 are closed, the energy required for the remagnetization is small compared to the energy accumulated in the choke 8 during the stabilizer operating time, therefore the inductance value of the chokes 13 is chosen from conditions

12

L IS I 13, .. Lj I -,

(2)

where is the current through the choke 13 and

the primary winding of the transformer 4;

I .. is the current through the choke 8 and the secondary winding of the transformer 4;

LU is the inductance of the droplets 8 of the DLC filter 10, according to condition (2) L, 3 The capacitor 12 in the stabilizer circuit is designed to provide a continuous current mode in the inductor 13 at the moment when the transistor 5 is already closed, the transistor 14 has not yet opened

S

The SL that allows the overpumps on the choke 13 to be prevented. Considering that the delay time for unlocking the transistor 14 is short compared with the duration of the closed state of the transistor 5, the value of the condensate capacitance

12 is chosen insignificant according to condition (1).

The energy accumulated in the capacitor 12 capacitance, according to the condition (1), is small and has a negligible effect on the process of magnetization reversal of the transformer 4, which is determined by the energy of the dross l 13.

Thus, the work of the core of the power transformer is provided for a more complete cycle of the hysteresis loop, which allows reducing the size and weight of the power transformer by 35%.

Introduction of accumulative throttle

13 does not increase the volume and weight of the device, since this choke is partially re-magnetized and the degree of permanent biasing is insignificant.

Claims (1)

Invention Formula A DC voltage regulator containing a power transformer with primary, auxiliary and secondary windings, an input filter capacitor, a power transistor, a rectifying diode, a DLC filter, a control node, the end of the primary winding being connected to - 0 S 0 S The lecturer of the power transistor, the zmitter of which is connected to the first input terminal, the beginning of the output winding is connected to the anode of the rectifying diode, the cathode of which is connected to the input of the DLC filter, the output connected to the first output terminal, the end of the output winding is connected to the second output output, input the control node is connected to the output pins, and the output is connected to the control input of the power transistor, characterized in that, in order to improve the weight and size parameters, the magnetization reversal transistor A resistor and a cumulative choke, the inductance of which is chosen from the condition LI si, where L is the inductance of the cumulative throttle; 1 - current through it; C - capacitor input filter; U is the voltage across it, and the beginning of the primary winding of the power transformer is connected to the end of the additional winding and the end of the accumulative throttle, the beginning of which is connected to the second input and the emitter of the magnetization transistor, the base of which is connected to the middle output of the accumulator through the limiting resistor , the collector of the magnetization reversal transistor is connected to the beginning of the additional winding of the power transformer, the beginning of the primary winding of which is connected through the input filter capacitor but with the first input terminal.