RU103041U1 - ELECTRIC AC GENERATOR - Google Patents

Abstract

 An electric alternator comprising a cylinder of an internal combustion engine equipped with a valve and an electric coil, and a piston located in the cylinder to form one combustion chamber, characterized in that the piston is rigidly connected to the rod, the electric coil is located inside the lower part of the cylinder, and the rod is fixed to a number of ring magnets facing each other with opposite poles.

Description

The invention for a utility model relates to electrical engineering, namely to engine-generator systems, and can be used in the design and manufacture of AC sources.

A known system is an alternator-motor generator [1], in which the armature rotates to excite the emf in the power windings of the stator. Often in this system, internal combustion engines are used as an engine [2]. The disadvantage of this system is the difficulty of converting using the crank mechanism of the reciprocating movement of the engine pistons into the rotational movement of the crankshaft connected to the generator armature.

The closest in technical essence to the proposed invention for a utility model is an electric alternator containing a cylinder of an internal combustion engine made of non-magnetic material and equipped with valves, candles and electric windings, as well as a piston in the form of a permanent magnet freely placed in the cylinder [3] .

The disadvantage of the generator is the lack of piston seals and low wear resistance of a cylinder made of non-magnetic material, which impairs the operation of the piston and cylinder and reduces the service life of the unit.

The aim of the invention to a utility model is to increase the life of the generator.

This goal is achieved by the fact that the electric alternator containing the cylinder of the internal combustion engine, equipped with a valve and an electric coil, as well as a piston placed in the cylinder with the formation of one combustion chamber, characterized in that the piston is rigidly connected to the rod, the electric coil is located inside the lower part of the cylinder, and a number of ring magnets are fixed on the rod, facing each other with opposite poles.

Figure 1 presents a structural diagram of the proposed electric generator when the piston is located at top dead center (TDC), and figure 2 - with the position of the piston at bottom dead center (BDC).

The generator comprises a cylinder 1 of an internal combustion engine, equipped with a valve 2 and an electric winding 3. Inside the cylinder 1, a piston 4 is located with the formation of one combustion chamber. The piston 4 is rigidly connected to the rod 5, the electrical winding 3 is located inside the lower part of the cylinder 1. A number of ring magnets 6 are fixed to the rod 5, facing each other with opposite poles.

The generator operates as follows. When the position of the piston 4 at the top dead center (Fig. 1) in the cylinder 1, fuel is burned and the piston 4 with the rod 5 and ring magnets 6 moves down to the BDC. The valve 2 is closed. Due to this movement, the magnetic fluxes of the ring magnets 6 generate an EMF in the electric winding 3, which is removed from the output connectors (not shown in Fig. 1). In the BDC (figure 2), a fresh charge of air enters the cylinder 1 of the engine through the purge windows, and the exhaust gases are removed through the open valve 2. When the piston 4 moves from the BDC to the TDC, the magnetic fluxes of the ring magnets 6 again generate EMF in the electric winding 3. Then the cycle repeats.

It should be noted that in marine low-speed crosshead engines, a fresh charge of air entering the engine cylinder through the blowdown windows has a temperature not exceeding 100 ° C [4]. With such heating, existing electrical insulation materials provide high reliability and durability in terms of temperature index and heat resistance [5]. Therefore, the electric winding 3 attached to the lower part of the cylinder 1 will not be subjected to excessive temperature loads.

During operation, the internal combustion engine can provide not only the generator drive, but also the propeller drive on the vessel. In this case, there is no need to have an additional diesel generator on board [2].

1. Atkins B. The general theory of electrical machines. Per. from English I.V. Antika. State Energy Publishing House. M. -., L 1960.272 s.

2. World ship diesel engineering. Design concepts, analysis of international experience: Textbook. allowance / G.A. Konke, V.A. - M .: mechanical engineering, 2005.512 s.

3. Electric alternator: Pat. 2046966 Ros. Federation. No. 4801644/06; declared 11/29/1989; publ. 10/27/1995.

4. Diesels. Directory. Under the general editorship of V.A. Vansheydt, N.N. Ivanchenko, L.K. Kollerova. L .: Mechanical engineering, 1977.480 s.

5. Design of electrical machines: Textbook. for universities. - In 2 kN. 1 / I.P. Kopylov, B.K. Klokov, V.P. Morozin, B.F. Tokarev; Under. Ed. I.P. Kopylov. -M.: Energoatomizdat, 1993.446 s.

Claims (1)

An electric alternator comprising a cylinder of an internal combustion engine equipped with a valve and an electric coil, and a piston located in the cylinder to form one combustion chamber, characterized in that the piston is rigidly connected to the rod, the electric coil is located inside the lower part of the cylinder, and the rod is fixed a number of ring magnets facing each other with opposite poles.