SU1647859A1 - Pulse modulator - Google Patents

Description

The invention relates to a pulsed technique and can be used for pulsed power supply of electrical installations for various purposes.

The aim of the invention is to increase reliability.

Figure 1 shows the circuit diagram of the device; Fig. 2 shows time diagrams of voltages therein. The pulse modulator contains a high-voltage power supply 1, a charging element 2, a storage capacitor 3, a modulator lamp 4, a load 5, a pulse transformer b, a bias capacitor 7, a diode 8, a bias resistor 9, a coupling capacitor 10, a power source 11, a transistor 12, a thyristor 13, forming line 14, a control unit 15, a control bus line 16.

The positive pole of the power supply source 1 is connected via the charging element 1 to the anode of the lamp 4 and the first terminal of the capacitor 3. The cathode of the lamp 4 is connected to the beginning of the secondary winding of the pulse transformer 6, through the capacitor 7 is connected to the anode of the diode 8, and through the load 5 is connected to the second terminal the capacitor 3, the negative poles of the sources 1 and 11, the cathode of the thyristor 13, the end of the primary winding of the pulse transformer 6 and the common bus. The positive pole of the power supply 11 is connected to the collector of the transistor 12, the emitter of which is connected to the anode of the thyristor 13, and through the forming line 14 is connected to the beginning of the primary winding of the pulse transformer 6, the end of the secondary winding of which through the capacitor 10 is connected to the grid of the lamp 4. transformer 6 is connected to the anode of diode 8, the cathode of which through a resistor 8 is connected to the grid of the lamp 4. The control unit 15 is connected to the bus 16, its first output is connected to the base of the transistor 12, and its second output is with the control electrode of the thyristor 13.

Pulse modulator works as follows.

In the initial state of the modulator lamp 4, the transistor 12 and the thyristor 13 are locked. The storage capacitor 3 is charged from the high-voltage power supply 1 via the charging element 2. The forming line 14 and the capacitor 7 are also charged. At time ti (Fig. 2a), from the control unit 15, a control pulse arrives at the input of the thyristor 13, which opens it. Forming line 14 is discharged through the thyristor 13 to the primary winding of the pulse transformer 6, a secondary pulse appears on the secondary winding ( 2e) applied between the grid and the cathode of the lamp 4.

The modulus of the torn lamp 4 opens under

the action of this impulse. Condenser 3 begins to discharge into discharge 5, at which a positive output pulse is formed (Figure 2d). The duration of the output pulse is determined by the parameters

0 forming line 14. To eliminate distortion of the control pulse on the grid of the lamp 4, the resistance of the bias resistor 9 must be matched with the characteristic resistance of the forming line 14,

After the end of the pulse at time t2 (Fig. 2b) of the modular lamp 4, it is closed by the negative voltage supplied to its grid from the capacitor 7

0, and the storage capacitor 3 begins to charge from the high voltage source 1 through the charging element 2.

At time tz on the first exit

5, a control pulse appears (FIG. 2b) arriving at the base of the transistor 12. Transistor 12 opens, and the forming line 14 is charged. A pulse appears at the secondary winding of the pulse transformer 6, and a diode 8 opens and a recharge of the capacitor 7 bias occurs (Fig. 2B). The separation capacitor 10 serves to prevent discharge.

5 of the capacitor 7 through the secondary winding of the pulse transformer 6. As the next control pulse arrives on bus 16, the processes in the pulse modulator are repeated.

Claims (1)

0 claims A pulse modulator containing a high-voltage power source, the positive pole of which is connected via a charging element to the first terminal 5 of the storage capacitor and the anode of the modulator lamp, the cathode of which is connected to the first output of the bias capacitor and the first output of the load, the second output of which is connected to the second output of the capacitor capacitor, the bias resistor, the first output of which is connected to the grid of the modulator lamp, and the second output is connected with second bias capacitor lead, power supply, negative The 5 pole of which is connected to the common busbar, the negative pole of the high voltage power supply and the thyristor cathode, a diode and a control unit, characterized in that, in order to increase reliability, a pulse transformer, a coupling capacitor, a forming line and a transistor are inserted into it, and the transistor collector is connected with the positive pole of the power source, the emitter is connected to the thyristor anode and the first output of the forming line, and the base of the transistor is connected to the first output of the control unit, the second output of which is under The key is connected to the control electrode of the thyristor, and the input is connected to the control pulse bus; the second output of the forming line is the connection At the beginning of the primary winding of the pulse transformer, the end of which is connected to the common bus and the second load terminal, the first output of which is connected to the beginning of the secondary winding of the pulse transformer, the end of which is connected to the grid of the modulator lamp through a separation capacitor, the secondary winding of the pulse transformer is connected with the cathode of the diode, the anode of which is connected to the second output of the bias capacitor.