SU788356A2 - Method of charging inductive storage from three-phase shock oscillator - Google Patents

Description

one

The invention relates to methods for charging inductive drives based on the use of electromotive pulsed energy sources, and can be applied in physical research to create strong magnetic fields.

According to the main author. St. No. 604139 is known a method of inductive accumulation of 10 bodies from a three-phase percussion generator, in which at each charging stage two phases of a three-phase percussion generator are connected to an inductive storage device at the moment of transition 5 of their linear EMF through zero in the positive direction, the third phase of a three-phase percussion generator is connected to the inductive accumulator at the moment of maximum its flux linking, 20 and then disconnect one of the two initially switched on phases and the third phase of the three-phase shock generator with a sequential pass enii nihcherez zero current, wherein demp- Fern winding 25 along the transverse axis of the three-phase surge generator at each stage of charging, CCI is connected to the short circuit at the beginning of the positive half of its electromotive force and off JQ

from a short-circuited circuit at the moment of current transition in it through zero pj.

However, the use of the known method does not allow to achieve a sufficiently high power of inductive storage of the accumulator due to a decrease in the main magnetic flux due to the demagnetizing effect of the core reaction along the longitudinal axis of the three-phase shock generator.

The purpose of the invention is to increase the average power of an inductive storage charge from a three-phase shock generator.

The goal is achieved by the fact that in the method of charging an inductive storage device from a three-phase shock generator, in which at each stage of charging, two phases of a three-phase shock generator are connected to an inductive drive at the moment of their transition to a linear EMF in the positive direction, the third phase of the three-phase shock the generator to the inductive storage device 3, the moment of maximum of its flow-coupling, and then disconnect one of the two initially switched on phases and the third phase of the three-phase shock generator at sequential passage of the current in them through zero, and the damper winding along the transverse axis of the three-phase shock generator at each stage of charging is connected to a short-circuited circuit at the beginning of the positive half-wave of its EMF and disconnected from the short-circuited circuit at the moment of current flow through it at zero at each stage of charging the damper winding along the longitudinal axis and the excitation winding of the three-phase percussion generator connects to the short-circuited circuit at the beginning; put; EMF of their half-wave and cut off from. short-circuited when current flows through them through zero.

FIG. Figure 1 shows a circuit diagram that implements the proposed method; in fig. 2krIbye currents and emf.

The basic electrical circuit contains a three-phase shock generator 1, consisting of a rotor and a stator with phase windings A, B, C (phase alternation AB), inductive drive 2, winding 3 excitations of a three-phase shock generator, damping windings 4 and 5 along the longitudinal and transverse axes of a three-phase shock generator and switches 6-11.

FIG. 2 shows the phase currents A Sk .. the current ifj is inductive. fed 2, the current of the switch 7, the current i of the winding 3 of the excitation of the three-phase shock generator, the currents i, 1 the damping windings 4 and 5, the linear emf of phase i,

In the initial state, the rotor of the three-phase percussion generator rotates at a nominal speed, the compressor 11 is closed, the excitation winding of the three-phase percussion generator 3, powered by direct current, induces a phase electromotive system in the phase windings shifted by 120 el. hail. Switches 6-9 are open, switch 10 is closed.

At time tp, when the linear passes through zero in the positive direction, the switch 6 closes, connecting the three-phase shock generator to the inductive drive. In phase windings A and C, currents 1d begin to flow. The current flows in the inductive storage device. In this case, the kinetic energy of the generator is converted to the electromagnetic energy of the inductive storage device. As the switch 9 is open, the generator rotor has an asymmetrical damping system, the presence of which leads to an increase in the flux linkage of the free phase winding B to a value exceeding the maximum flux linkage of the phase windings at idle. At time t, when the emf g (passes through zero in the positive direction, the switch 8 closes,

Connecting the phase winding B to the inductive drive. The phase winding current B is significantly higher than the phase winding current L, since the connection of the phase winding B occurred with an increased value of the EMF. The current ig, summing with the current 1d, leads to a further increase in the current of the inductive accumulator, since the switches 10 and 1 are closed, the currents i.j and i increase in the positive direction, damping the response of the core along the longitudinal axis of the rotor. At the moment when the flow coupling of the damper winding reaches its maximum along the transverse axis 5, which corresponds to its zero crossing EMF (t), the switch 9 closes and the reaction flow of the core along the transverse axis is captured by the damper winding of the transverse axis 5. A further increase in the currents of the phase windings and the inductive drive occurs under the action of the resulting magnetic flux generated by the damper winding along the transverse axis 5 and the excitation winding 3, which significantly exceeds the initial magnetic excitation flux. Thus, the forcing of the excitation of a three-phase shock generator along the transverse axis occurs when using the captured magnetic flux of the core reaction.

The current d, having reached its maximum value, begins to decrease and when it passes through zero, the switch 6 opens. FIG. 2 this moment corresponds to t / j. When the maximum current of the inductive accumulator is reached at time t, the switch 7 closes, the current in the phase windings B and C begins to decrease, and the current of the switch 7 increases. As a result of the joint action of all windings of the resultant rotor, the flow of excitation is shifted in the direction opposite to the direction of rotation of the rotor, which leads to the effect of the pulsed magnetizing action of the core in the direction of the longitudinal axis. With this, the currents i-j, and i4 decrease. At time t, when currents i 3 4 dch, zero is blinking, switches 10 and 11 open. During time tg-1l, the magnetic flux along the longitudinal axis of the rotor increases. When the EMF of the windings and excitation and damping windings pass along the longitudinal axis through zero in the positive directions (t); switches 10 and 11 are closed. When the current ig passes through zero, the switch 8 opens and the three-phase shock generator goes into idle mode. FIG. 2 this moment corresponds. During the time when the inductive accumulator is short-circuited, energy in Nemzus minus active losses is conserved. The decay of the accumulator current during this period is determined by the constant time.

Claims (1)

Claim The method of charging an inductive storage from a three-phase shock generator according to ed. No. 604139, characterized in that, in order to increase the average power, at each charging stage, the damper winding along the longitudinal axis and the excitation winding of a three-pha shock generator are connected to the short-circuited circuit at the beginning of the positive half-wave of their EMF and disconnected from the short-circuited circuit when current flows through them zero.