SU1475450A1 - Device for pulsed feeding - Google Patents

Abstract

The invention relates to a technique of pulsed powering equipment for accelerators of charged particles and can be used to generate high-power current pulses with a stable amplitude, in particular for modulating the current in the discharge chamber of an ion source. The purpose of the invention is to increase the efficiency of the device by reducing its energy loss. The device contains an inductive on. accumulator 1, stable current source 2, current sensor 3, switch 4, control unit 5, pulse voltage source 6, current setting device 8, voltage sensor 9 and threshold element 10. Introduction of inductive storage device 11, adjustable voltage source 12, diode 13, the key 14 and the amplifier 15 allows to increase the efficiency of the device by reducing the energy loss to the sum of the energy consumed by the sources 2 and 12. 2 Il. g (L

Description

one

The invention relates to a technique of pulsed powering equipment for accelerators of charged particles and can be used to generate high-power current pulses with a stable amplitude, in particular for modulating the current in the discharge chamber of an ion source.

The aim of the invention is to increase the efficiency of the device by reducing its energy loss 1.

FIG. 1 is an electrical schematic diagram of the device; in fig. 2 - timing charts of the device.

The device for pulsed power supply contains in series the first inductive drive 1, a stable current source 2, a current sensor 3 with an input ohm-output ohm. The output of the sensor 3 is connected to the input of the first key 4, the control input of which is connected to the first output of the control unit 5. The second and third outputs of the unit 5 are connected to the control inputs of the pulsed voltage source 6, the first bus of which is connected to the first output bus 7. The control input of the stable current source 2 is connected to the output of the current setting unit 8. The device also includes a voltage sensor 9, a threshold element 10, a second inductive drive 11, an adjustable

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voltage source 12, diode 13, second switch 14 and amplifier 15. Voltage sensor 9 is connected between the first and second output buses 7 and 16, the output of which is connected to the control input of the second switch 14 via threshold element 10. The output of switch 14 is connected to the cathode of the diode 13, the second output of the first inductive on-capacitor 1 and through the second inductive drive 11 is connected to the second bus of the pulsed voltage source 6 and the output of the first key 4. The input of the second key 14 is connected to the first output of the source 12, the second output of which is connected to the diode anode 13 and input-current sensor 3. The control input of the voltage source 12 is connected to the output of the amplifier 15, the first and second inputs of which are connected respectively to the outputs of the current setting device 8 and the current sensor 3. Voltage pulse source 6 can be made on series-connected second diode 17 and thyristor 18. Diode 17 is shunted by capacitive storage 19. Anode of diode t7 and cathode of thyristor 18 are respectively input and output of source 6. Anode of diode 17 is connected to its cathode through series connected inductance coil 20, rectifier 21 and second thyristor anode cathode 22. The control inputs of the first and second thyristors 18, 22 are the corresponding control inputs of the voltage source 6. Position 29 marked the load.

14754504

The device works as follows.

At the initial time t0 0 the thyristors 18, 22, the key 14 and the diode 13 are closed, and the key 4 is open. On the interval tc- t ,, the voltage source 23 is closed through inductive drives 1

And 11, TOKI 14I ijKOTOpbDC (CM, FIG.

2a, b) are equal and maintained at a predetermined level by means of a negative feedback circuit closed from the output of current sensor 24 through amplifier 25 to control input 15 of voltage source 23 and current adjuster 8. At the same time interval, the thyristor 22 is turned on by the pulse of the generator 28 of the control unit 5 and the resonant charge of the capacitive storage 19 from the rectifier 21 through the inductor 20 is carried out. At the time C, the thyristor 18 turns on and the voltage of the capacitive voltage is turned on drive 19 through the output bus 7, 16 to the load. This leads to the ignition of the arc in the discharge chamber of the source of ion ions (see Fig. 2b) and rapid accumulation

25

thirty

current t

and

When reaching then 35

The comma 1 and the current yy of the accumulator 11, the key 4 is locked, and the current 12 is transferred to the load circuit. Further, the current 1d, equal to the current 1 ", is the fast discharge of the capacitive storage device 19 and the unlocking of the diode 17. With the appearance of the current I, i.e. the appearance of a signal to

the output of voltage sensor 9, the threshold element 10 triggers. This turns on key 14. Thus, from the moment key 14 is turned on, two current control loops are formed in the device — current i, drive t, and current i.e. to be performed on the voltage source 23 connected in series and the second current sensor 24, the outputs

the output of voltage sensor 9, the threshold element 10 triggers. This turns on the key. Thus, from the moment the switch 14 is turned on, two current control loops are formed in the device — current i, drive t, and current i

which are respectively the first 11. And the current 1g, equal to the current

Vym and second outputs of source 2 of stable current. The control input of the voltage source 23 and the second output of the current sensor 24 are respectively connected to the output and the first input of the second amplifier 25, the second input of which is the control input of the stable current source 2.

The control unit 5 can be high, maintained at a predetermined level by the amplifier 25 and the voltage source 12, and the current i decreases slowly, since U, Ua (see -Q Fig. 2g, e). On this interval 1gk 1, + 1E (see fig 2d). Under the action of a negative feedback circuit, the voltage U, the source 23, quickly reaches its maximum value

current t

and

When reaching

The comma 1 and the current yy of the accumulator 11, the key 4 is locked, and the current 12 is transferred to the load circuit. Further, the current 1d, equal to the current 1 ", is the fast discharge of the capacitive storage device 19 and the unlocking of the diode 17. With the appearance of the current I, i.e. the appearance of a signal to

the output of the voltage sensor 9, the threshold element 10 is triggered. This switches on the key 14. Thus, from the moment the key 14 is turned on, two current control loops are formed in the device - current i, drive t and current i accumulator 11. And current 1g equal to current

1H, is maintained at a predetermined level by the amplifier 25 and the voltage source 12, and the current i slowly decreases, since U, Ua (see Fig. 2g, e). On this interval 1gk 1, + 1E (see fig 2d). Under the action of a negative feedback circuit, the voltage U, of the source 23 quickly reaches its maximum value

complete on series connections. At the moment t, the pulse of the poison elements 26, 27 of delay and delay 26 of delay is turned on by the driver 28, whose outputs are key 4, which bypasses the load. with the corresponding outputs of block 5 This leads to the cessation of current 1H

management

in load switching threshold

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Claims (1)

Claim A device for switching power supply ₃₅ , comprising a first inductive storage device in series, a stable current source having an input-output tone sensor, the output of which is connected to the input of the first key, the control input of which is connected to the first output of the control unit, the second and third outputs of which are connected with the first and second control inputs! a pulsed voltage source, the first bus of which is connected to the first output bus, and the control input of the stable current source is connected to the output of the current generator, a voltage sensor and a threshold element, characterized in that, in order to increase the efficiency of the device by reducing losses into it a second inductive drive, an adjustable voltage source, a diode, a second switch and an amplifier are introduced, and a voltage sensor is connected between the first and second output buses, the output of which is connected to the control via a threshold element the input of the second switch, the output of which is connected to the cathode of the diode, the second output of the first inductive storage and connected through the second inductive storage to the second bus of the pulse voltage source and the output of the first key, the input of the second key is connected to the first output of the adjustable voltage source, the second output of which is connected to the anode of the diode and the input of the current sensor, the control input of an adjustable voltage source is connected to the output of the amplifier, the first and second inputs of which are connected respectively to the outputs of the task Current and current sensor. fi / e. 7 Compiled By (Chizhikov