SU1674089A1 - Pulse stabilizer of direct-current voltage - Google Patents

Abstract

The invention relates to electrical engineering and can be used as a power source for various electronic equipment. The aim of the invention is to increase reliability and efficiency. The device contains a series-connected key transistor 5, a storage choke 13, a filter capacitor 7, a first chain from the first diode 8 and a capacitor 9, a second chain from the first winding 11 of the current-limiting throttle 12 and a second diode 10, the second winding 15 drossel 12 through the third diode 14 is turned on between the input terminal 1 and the common point of the diode 8 and the capacitor 9. The energy stored by the inductor 12 in the recovery phase of the diode 10 is used to recharge the capacitor 9, which leads to a decrease in the power loss in transistor 5 when switching it and dumping the energy of the capacitor 9 into the load. 1 il.

Description

The invention relates to electrical engineering and can be used as a power source for various electronic equipment.

The aim of the invention is to increase reliability and efficiency.

The drawing shows a diagram of a pulsed DC voltage stabilizer.

The pulse stabilizer contains sequentially connected between the input 1, 2 and output 3, 4 conclusions of the key transistor 5, the control input | which is connected to the output of the control unit 6, a filter capacitor 7 connected between the output terminals 3, 4, the first chain of series-connected first diode 8 and capacitor 9, the second: a chain of series-connected second diode 10 and first winding 11 of current limiting inductor огранич2, connected parallel to each other between the combined input and output terminals: 2 and 4 and the connection point of the transistor; 5 with a storage inductor 13, and a third: a diode 14, the first electrode of which is connected to the connection point of the diode 8 and the capacitor 9 of the first circuit, while the second winding 15 of the current-limiting inductor 12 is connected to the second electrode of the third diode 14 and the input terminal 1 .

The pulse stabilizer operates as follows.

When saturated transistor 5, on: the load connected to the output terminals 3, 4, receives energy from the primary source: a nickname connected to the input terminals 1,

2. When the transistor 5 is turned off, the load current first closes along the first circuit with the capacitor 9. At the same time, the current in the second circuit with the inductor 12 starts to increase (winding 11). The charge of the capacitor 9 and the switching of the load current to the winding 11 of the inductor 12 occurs in a few microseconds. The inductor 12 is saturated during the same order. The saturation time of the magnetic circuit when a supply voltage is applied to it is selected based on the recovery time of the diode 10.

By the time the transistor 5 is turned on, the load current is guaranteed to flow through the diode 10, since in practical schemes there is always a limitation of the order of 1-2 μs for the maximum angle of the transistor's turn on. When the transistor 5 is turned on, the reverse current through the diode 10 is limited by the current-limiting inductor 12 to the required value. After restoration of the diode 10 due to the voltage on the capacitor 9 and the stored energy, the throttle 12 starts recharging the capacitor 9 through the winding 15 of the inductor and the turned on transistor 5 to the voltage of opposite polarity, i.e., the capacitor 9 is prepared for the next cycle of operation, which occurs when the transistor turns off 5.

The energy stored in the inductor 12 during the recovery phase of the diode 10 is discharged to the capacitor 9. When the transistor 5 is turned off, the load current switches to the first circuit with the capacitor 9, which is charged (the polarity is indicated in brackets). This polarity of the voltage of the capacitor helps to reduce dynamic losses in the transistor 5 when it is turned off. In this case, the energy stored by the capacitor in the on-state interval of the transistor 5 is dumped into the load. The discharge time of the capacitor 9 in practical cases is selected 1.5-2 times longer than the turn-off time of the transistor

5.

Thus, the energy of the current-limiting inductor 12, stored in the recovery interval of the diode 10 of the first circuit, is not dissipated in the additional resistors, but enters the capacitor 9 of the second circuit and then to the load. In addition, the off mode of the transistor 5 is facilitated.

Claims (1)

Claim A pulsed DC voltage stabilizer containing a key transistor connected in series between the first input and output terminals, the control input of which is connected to the output of the control unit, and a storage choke, a filter capacitor connected to the output terminals, a first chain of a series of connected first diode and capacitor, a second chain from a series-connected second diode and. the first winding of the current-limiting inductor, the first and second circuits connected in parallel to each other between the combined second input and output terminals and the connection point of the key transistor with the storage inductor, and the first and second diodes are connected unidirectionally, and. the third diode, the first output of which is connected to the connection point of the first diode and the capacitor, while the first and third diodes are turned on according to, characterized in that, in order to improve reliability and efficiency, the current-limiting inductor is equipped with a second winding connected by the eye of the third diode and the first input with the first winding between the second output. Editor T. Rybalova Compiled by E. Finogenov Tehred M. Morgenthal Corrector O. Kundrick Order 2921 Circulation 447 Subscription VNIIIPI of the State Committee for Inventions and Discoveries under the State Committee for Science and Technology of the USSR 113035, Moscow, Zh-35, Raushskaya nab., 4/5 Production and Publishing Combine Patent, Uzhgorod, 101 Gagarin St.