SU782693A1 - Self-sustaining mhd-generator - Google Patents

Abstract

1. AUTONOMOUS MAGNETIC HYDRODYNAMIC GENERATOR, containing a channel, an electromagnet, an initial excitation energy source and a load, characterized in that. In order to simplify the generator and to obtain at its output an alternating voltage G1, parallel to the winding of the electromagnet and the channel of the magnetohydrodynamic generator, an additional capacitance of the parallel oscillating circuit including the winding of the electromagnet is connected, and a frequency controlled key is inserted between the winding of the electromagnet and the channel. 2. An autonomous magnetohydrodin {an oscillator according to p. 1, 6 tl and h and n and so that, in order to improve the weight and size indicators, the initial excitation energy source contains conden. Sated battery included in the additional capacity.

Description

The invention relates to the field of direct conversion of thermal energy into electrical energy, namely, autonomous magnetohydrodynamic (MHD) generators, and can be used, for example, in installations for geophysical surveys when electrically electing the earth's crust.

MHD alternating current generators are known that contain a channel, means for supplying the working fluid and an electromagnet that is connected to an alternating current network. The disadvantage of this MHD-generator is the impossibility of its operation in autonomous mode.

The closest technical solution is an autonomous MHD generator comprising a channel, an electromagnet, a source of initial excitation energy and a load. Disadvantage of such autonomous

The% 1 MHD generator is that for half a student at the output of an alternating voltage,

Che needed between channel and load

A self-contained inverter is connected, and this complicates and increases the cost of the design of the MHD generator.

with

The purpose of the present invention is to simplify the generator and get to

its output is ac voltage.

The goal is achieved by those. what.

tgL in a known autonomous magnetohydrodynamic generator containing a channel, an electromagnet, an initial excitation energy source and a load parallel to the electromagnet winding and the MHD generator channel, an additional capacitance of the parallel oscillating circuit including the electromagnet winding is connected, and a frequency control is inserted between the electromagnet winding and the channel . In addition, the initial excitation energy source contains a capacitor bank included in the additional capacity.

The drawing shows an electrical circuit of an autonomous MHD generator.

The MHD generator has a channel 1, a frequency controlled key 2, a winding of a magnet 3, an additional capacitance 4, a source of initial excitation energy 5, a key 6, a switching source of initial excitation energy and a load.

In parallel with channel 1, frequency controlled key 2 connected in series with channel 1 is connected to winding electromagnet 3 and an additional capacitance of parallel oscillating circuit 4. Parallel to winding electromagnet 3 through source switched off key b an initial excitation energy source 5 is connected. Load 7 is connected to channel 1 terminals .

In other variants of the circuit, it is possible to connect the source of energy of the initial vessel and the load 7 in series with the winding of the electromagnet.

Works MHD-gönöratbr, performed according to the. Scheme, as follows. At the initial moment of time, the source of the initial excitation energies B through the closed key 6 supplies the winding of the electric motor; agnit 3. A current appears in the conductors of the rbmt 3, a voltage appears in the channel 1, and a voltage appears on the terminals of the channel 1. When the voltage on the terminals x of channel 1 becomes greater than the voltage of the initial excitation energy source 5, the switch 6 opens.

The process of the generator on the mode of self-excitation. At the moment of time determined by the required frequency, with

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disconnect channel 1 from the excitation circuit. As a result of the oscillating energy exchange between the inductance of the winding of the electromagnet 3 and the additional capacitance 4, the additional capacitance 4 is recharged in reverse polarity. In this case, in the winding of the electromagnet 3, and therefore, the induction in channel 1 and the direction at the output of the generator become equal to zero. Using a frequency controlled switch 2, the channel is connected to the excitation circuit, an additional capacitance 4 is discharged to the winding of the electromagnet 3 and a reverse polarity current is created in it. In channel 1, reverse polarity induction occurs and the circuit comes to a state similar to the previous one, at which the voltage of the other polarity is produced. Periodically turning the frequency controlled key 2 on and off, the output receives an alternating voltage of the required frequency. The value of additional capacitance 4 must be such that it can take all the energy stored in the winding of electromagnet 3., j

This device will allow, instead of using frequency controlled switches of an inverter, to have at the output of an MHD generator one frequency controlled key in the excitation circuit, which in this case will carry out switching of lower power. This leads to a simplification of the device and to an increase in its reliability, as well as to a reduction in the weight and size characteristics of the MHD generator. In addition, compared with the known autonomous MHD generator that generates a DC output, the proposed device has the advantage that it greatly simplifies the conversion of the output voltage, since the conversion of an alternating voltage is much simpler than a constant one.

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Claims (2)

(54X57) 1. A stand-alone magnetohydrodynamic generator containing a channel, an electromagnet, an initial excitation energy source and a load, characterized in that. in order to simplify the generator and to obtain an alternating voltage at its output parallel to the electromagnet winding and the magnetohydrodynamic generator channel, an additional capacitance of a parallel oscillatory circuit including the electromagnet winding is connected, and a frequency controlled key is introduced between the electromagnet winding and the channel. 2. The self-contained magnetohydrodynamic generator according to claim 1, with the fact that, in order to improve weight and size indicators, the initial excitation energy source contains a capacitor bank, which is included in an additional i capacities. ;