SU478419A1 - Generator of bipolar pulses - Google Patents

Description

(54) GENERATOR OF MULTIPOLAR PULSES

 -one . ., -,

The invention relates to a pulse technique.

A generator of different-field impulses is known, comprising a transistor blocking generator, a transistor switch,

the collector circuit of which includes an output transformer. A disadvantage of the known generator is low efficiency.

The chain of the invention is to increase efficiency.

To do this, an additional winding is installed on the output transformer, including the interchange between the emitters of the blocking generator and the key transistors, while the collector of the key transistor is connected

through an additional diode with an anode diode

, Yes.

 The drawing shows the electrical circuit of the generator.

. The generator of bipolar pulses contains a blocking generator on the transistor 1, a blocking transformer 2 from the primary 3, the secondary 4 and an additional 5

; -winding, diode 6, resistor 7, capacitor 8, switch on transistor 9 and output transformer Yu, with primary 11, output 12, additional 13 windings and diode; 14.

The generator operates as follows. When the power is turned on, a current flows in the circuit formed by the primary winding 3, the capacitor 8 and the resistor 7. Capacitor 8 will begin charging. This

. current induces emf in the windings 4, 5. The SED of the winding 5 is applied to the transistor 9 in such a way that it closes it, and the emf of the winding 4 is applied so to the transistor 1 that it opens.

The increment of the base current of transistor 1 causes an increase in the emitter current of this transistor, which, when transformed into

: base circuit, contributes to a further increase in the base current. This process is avalanche-like and continues until the capacitor 8 is charged.

The current of the transistor 1 consists of the charge current of the capacitor 8 and the current flowing through the winding 13 of the transformer 10,

which leads emf in the output winding 12. After charging the capacitor 8, the magnetizing current of transformer 2 begins to decrease rapidly, which causes a change in the polarity of the induced

emf in the windings 4, 5 and, therefore, the complete closing of the transistor 1 and the opening of the transistor 9.

 Through the open transistor 9, the diode 14 and the winding 3, the capacitor 8 is discharged. The diode 6 prevents the capacitor from discharging into the winding 4 of the transformer 2 The current of the transistor 9 consists of the discharge current of the capacitor 8 and the magnetizing current of the transformer 1O, which

- running on winding 11, leads emf in the output winding 12.

The windings 11, 13 of the transformer 10 are turned on in such a way that the core of the transformer 10 will be re-magnetized along the full hysteresis loop, providing different polar field rectangular pulses on the winding, 12.

Back emission of emf due to

energy stored in a transformer

2 during the discharge of the capacitor, the transistor 9 is closed and the transistor 1 opens and the capacitor starts to charge through it, etc., whereupon the process repeats.

The subject is invented AND: (

A generator of bipolar pulses containing a transistor blocking generator, the windings of which include a diode, a key on the transistor, the base and emitter of which are connected to the additional winding of the transformer of the blocking generator, and the primary winding of the output transformer, characterized in that efficiency increase, an additional coil is installed on the output transformer, connected between the emitters of the blocking generator and the key transistors, while the collector of the key transistor is connected to complementary diode with diode anode.

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