Current pulse generator. RU patent 2509409.

IPC classes for russian patent Current pulse generator. RU patent 2509409. (RU 2509409):

H03K3/00 - PULSE TECHNIQUE (measuring pulse characteristics G01R; mechanical counters having an electrical input G06M; information storage devices in general G11; sample-and-hold arrangements in electric analogue stores G11C0027020000; construction of switches involving contact making and breaking for generation of pulses, e.g. by using a moving magnet, H01H; static conversion of electric power H02M; generation of oscillations by circuits employing active elements which operate in a non-switching manner H03B; modulating sinusoidal oscillations with pulses H03C, H04L; discriminator circuits involving pulse counting H03D; automatic control of generators H03L; starting, synchronisation, or stabilisation of generators where the type of generator is irrelevant or unspecified H03L; coding, decoding or code conversion, in general H03M)

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FIELD: electricity.

SUBSTANCE: current pulse generator comprises accumulating and switching capacitors, a power thyristor, circuits of charge and discharge of the switching capacitor, an inductive load, the circuit of switching capacitor charge is made of serially connected alternating linear inductance and winding of saturation throttle magnetisation, and the discharge circuit - from serially connected saturation throttle magnetisation winding and the first diode in the conducting direction, the second diode is switched in series with the inductive load.

EFFECT: simplified design.

2 dwg

The proposed device is a generator of electric current pulses (PCG) relates to the field of pulse technique and is designed to supply the field windings device that creates the impulse magnetic field, in particular for power-field windings engine reciprocating motion (VPD). We offer GIT can be used as a device to power impulse Electromechanical energy Converter source of seismic waves (ICB).

The famous round (A.S. USSR №1018201, CL NC 3/53, BI №18, 1983), designed to power the windings of the motor VPD current impulses. It contains charger, transformer with a main and auxiliary coils, capacitors, diodes, chokes, first and second basic and auxiliary thyristors connected in series and in direct relation to the charger. This round contains a large number of diodes, inductances and inductively connected windings. Energy recovery from inductive load is via inductively-coupled winding (transformer) in the storage capacitor. All this complicates the construction.

The famous round (A.S. USSR №911685, CL NC 3/335, BI №9, 1982)is intended for windings supply of Electromechanical energy converters VPD current impulses. It contains charger, storage and switching capacitors, power and switching thyristors, diode, inductive load and inductance circuit overcharging switching capacity. The main disadvantage of PCG is the complexity of the circuit artificial switching thyristor in the load circuit and the absence of primary circuit switching charge capacity.

Closest to the proposed by the technical nature and character of the course of electromagnetic processes is a device by A.S. USSR №1484249, CL NM 3/135, 1987 - a device for power impulse Electromechanical energy Converter source of seismic waves (prototype). GIT contains a bridge circuit of thyristors and diodes. To one diagonal attached storage capacitor and another excitation winding of the Electromechanical Converter. Switching capacitor shunted by a diode in series with the switching thyristor, which bridged of series-connected diode and inductance. The disadvantage of PCG prototype (A.S. USSR №1484249, CL NM 3/135, 1987) is the design complexity.

The aim of the proposed device is to simplify the design.

This goal is achieved by the fact that in the proposed round the charge circuit switching capacitor made of series-connected linear variable inductance and bias windings of the throttle saturation, and a chain of discharge from the series-connected winding magnetization throttle saturation and of the first diode in a conducting direction, consistently with inductive load enabled second diode.

The invention is illustrated by drawings: figure 1 shows the proposed generator pulses, figure 2 - curves currents and voltages on its elements.

The device in figure 1 consists of the storage capacitor 1, power thyristor 2, inductive load 3, charge circuit switching capacitor, composed of a series of linear variable inductance 5 and bias windings 6 throttle saturation 7. Circuit discharge switching capacitor consists of 4-series winding magnetization 8 saturating choke 7 and of the first diode 9. Consistently with inductive load 3, made for example in the form of excitation winding of electric motor VPD included a second diode 10.

Figure 2 shows the curves of voltages and currents on the elements of PCG, where 11 - the voltage at the storage capacitor 1; 12 - current, inductive load 3; 13 - voltage switching capacitor 4; 15 - current in windings are connected in series inductance 5 and 6.

The generator works of current pulses in the following way. In the initial position, storage capacitor charged 1 to source voltage polarity indicated on figure 1. Switching capacitor charged up to 4 source voltage polarity indicated on figure 1 without the brackets.

At the moment of time t 0 figure 2, when in inductive load 3 made, for example, as the motor excitation winding VPD, it is necessary to generate a pulse of current 12 figure 2, serves the control signal for the opening of the power thyristor 2. Thyristor 2 opens and capacity 1 oscillatory discharged on an inductive load 3, by law, is close to the cosine 11. In the 3 load, consistently included with the second diode 10, formed impulse current 12 and pulsed electromagnetic field. Simultaneously, through the charging circuit composed of linear variable inductance 5 and bias windings 6 throttle saturation 7, is oscillatory overcharge switching capacitor 4, voltage which varies according to the law, described by the curve 13. While in the chain overcharge current flows 15, under which the polarity of voltage on switching capacitor 4 is installed, as shown in figure 1 in brackets. Under the action flowing through the coil bias 6 throttle saturation 7 impulse current of 15 magnetic throttle system 7 magnetized, for example, in a situation characterized by the induction of saturation B m . At the moment of time t=t 1 voltage 11 discharge capacity 1 and voltage 13 rechargeable capacity 4 compares and at t>t 1 voltage 13-capacity 4 becomes more stress 11 tanks 1. Under the effect of this difference is stress the first diode 9 open in the circuit of the winding magnetization 8 throttle 7 current flows, magnetic inductor 7 in the situation characterized by the induction of saturation +B m . In the interval Delta t=t 2-t 1 magnetization reversal throttle 7 of its inductive impedance is large and current reverse magnetization small. At time t=t 2 magnetic throttle system 7 is saturated, it inductive resistance abruptly decreases (the material of the magnetic inductor 7 select hysteresis loop was close to the rectangular). The voltage difference Δu (figure 2) on vessels 1 and 4 at t=t 2 is sufficient for closing the thyristor 2. This voltage Δu to the thyristor 2 is applied as reverse thyristor 2 closes and the load current of 12 3 is caught in the chain capacity rechargeable 4, recharging its contour: 4 condenser coil 8 throttle 7, the first diode 9, winding load 3, diode 10, condenser 4 polarity indicated on figure 1 without the brackets. At the moment of time t=t 3 12V load 3 becomes zero, the voltage on the capacitor 4 reaches the maximum value. This voltage supports diode 10 in the closed state, and the current 15 linear throttle 5 decays to zero on the circuit: winding inductor 5, choke coil 6 7, winding 8 throttle 7, diode 9, winding inductor 5. At t>t 2 storage capacitor 1 from the power source is charged to the original maximum value and then offer GIT ready for the next trip.

For time adjustment Delta t=t 2-t 1 and, thus, energy, input from the storage capacitor 1 in inductive load 3, and became to be, and power (energy)consumed by the load 3, line inductance 5 perform adjustable (variable), for example, by changing the number of turns its winding or value of the air gap of its magnetic system. A decreasing value of inductance 5 curve 13 voltage recharge capacitor 4 will be steeper, as shown in figure 2, the dashed curve (14), the time of discharge capacity of 1 to 3 load decreases, and the power (energy) of the 3 load. When increasing the inductance 5 time capacitor discharge 1 to 3 load increases, the power (energy)consumed by the load increases.

In the proposed round one power thyristor and two diodes that was considerably simplified in comparison with the prototype as construction of PCG and the control scheme to reduce the size indicators and the cost of the round as a whole.

The pulse generator current, containing cumulative and switching capacitors, power thyristor circuit charge and discharge switching capacitor, inductive load, made, for example, as the motor excitation winding VPD, wherein the charge circuit switching capacitor made of series-connected linear variable inductance and bias windings of the throttle saturation, and a chain of discharge from the series-connected winding magnetization throttle saturation and of the first diode in a conducting direction, chain-of-charge and discharge are parallel to each other, and consistently with inductive load enabled second diode.