SU449457A1 - Electric filter - Google Patents

Description

one

. The invention relates to electric falters used in power supply systems for the excitation windings of proton synchrotron magnets.

An electrical filter (see av. Jfe 299946) is known, which contains an inductance, a capacitor battery, a controlled charge-rectifier, a synchronizing device, and a controlled valve. When the filter is turned on, the capacitor battery is precharged to the value of the average rectified voltage of the converter.

The disadvantage of this filter is the complex circuit, which includes a charge-controlled stabilized rectifier with devices for switching it on. As a result, the reliability of the filter operation is reduced, and when the level of the current I platform is changed, re-tuning of the recharging voltage

If, according to the conditions of physical extensions, two sites are required — in the current curve, the excitation of the accelerator's electrocable, differing in level by an insignificant magnitude-iy (one after the other for short periods of time) .. then to ensure the operation of the fyra0 recharge rectifier is burning be designed for high power (tens and hundreds of kilowatts) „

The purpose of the invention is to improve the efficiency of the filter due to

5 exclusion from oxe.vm: powerful treating, valuable rectifier. The goal is achieved due to the fact that the preliminary charging of the capacitor battery is carried out directly from the main converter during its transitions from one mode of operation to another through a preliminary charging circuit, made in the form of after-connected controllers and e1 .My Benthouses and resistors, connected to the output (;:. ltra,

To increase the cost of operation of the rechargeable valves, the charging circuit of the capacitor battery is equipped with an additional power resistor.

Figure 1 shows the functional diagram of the proposed electric filter; on phage.2 temporary diameters of voltages and currents completing the joint operation of the filter and the accelerator magnet power supply system

The electrical filter contains inductances I, control valves 2-5, power resistors 6-9, capacitor battery 10, and synchronizer II.

During the transition period, when the voltage of the valve converter% of the power supply 12 approaches the level of the current pad mode, at the moment t, at the command of the synchronizing device II, valves 2 are opened and by the time tz the capacitor battery closes at about the level of the average rectified voltage of the converter, working in site current. Power resistor 6 provides a steady burning valves 2.

At the moment tg, valves 3 and 5 open | valves 2 stop their work. From this point in time, the capacitor battery shunts the electrocamp of the accelerator 13. In the time interval (20 ms), the voltage of the converter of the power supply system of the accelerator electromagnet winding decreases to zero. As soon as this voltage becomes less than the voltage of the capacitor bank, the valves 3 go out; the valve 5 closes after the capacitor battery 10 is discharged to the power resistor 8.

When working with two sites in the excitation current of an electromagnet (according to the conditions of carrying out several (physical experiments) in one accelerating cycle, in the ts-te time interval, the filter is put into operation again in the same sequence as in the first one, ensuring automatically the voltage level of the charge of the capacitor battery. To ensure the stable operation of the valves 3, in this case the valve 4 is opened (for economy of electric power).

SUBJECT OF INVENTION

I. Electric filter for smoothed ri pulsations of the magnetic field of the proton synchrotron containing a synchronizing device, infectivity and a capacitor battery, connected controllable gates to the L-shaped filter circuit, which also differs from the fact that, in order to increase efficiency, it is equipped with a pre-charge circuit of a capacitor battery, made in the form of series-connected controlled gates and resistors connected to the output of the filter.

2. Electric filter on n.IjO similar to those of 4TOs. In order to increase the stability of the operation of the backup valves, the charging circuit of the capacitor batteries is shunted with an additional power resistor.