Back-mounted dual-piston-type free piston linear generator of symmetric structure

Abstract

The invention discloses a back-mounted dual-piston-type free piston linear generator of a symmetric structure. The back-mounted dual-piston-type free piston linear generator comprises a generator body, two two-stroke engines, a first auxiliary motor and a second auxiliary motor; the first auxiliary motor and the second auxiliary motor are symmetrically arranged on the two axial sides of the generator body, the first auxiliary motor and the second auxiliary motor are connected with the generator body, the first auxiliary motor and the second auxiliary motor are connected with the two-stroke engines, each two-stroke engine comprises an air cylinder body, a cylinder cover, a sparking plug, an oil atomizer, a piston, a crankcase set and a connecting rod, the first auxiliary motor, the second auxiliary motor and the generator body are coaxially arranged, the generator body, the first auxiliary motor and the second auxiliary motor are connected, a preset axial distance is set between the twoclosest windings of a generator stator, a preset axial distance is set between the two closest windings of a first auxiliary motor stator, and a preset axial distance is set between the two closest windings of a second auxiliary motor stator. The problem that the motor working mode switching response time is long is solved, and it is ensured that a piston reaches the designated position smoothlyso that the free piston linear generator can be operated stably.

Description

technical field [0001] The invention relates to the technical field of range extenders for new energy vehicles, in particular to a back-mounted double-piston free-piston linear generator with a symmetrical structure. Background technique [0002] In the prior art, the free-piston linear generator (FPLG) has a two-stroke back-mounted double-piston structure. The back-mounted double-piston structure is equipped with a two-stroke engine at both ends of the generator core shaft. The two-stroke engine is symmetrically arranged, and the crank connecting rod mechanism is omitted. A generator is connected between the two two-stroke engines. The electric generator and the two The motor is connected to the engine on the side, and the motor has two functions of motor and generator at the same time, but the disadvantage is that because FPLG omits the crank connecting rod mechanism, FPLG has the difficulty of controlling the piston movement, which leads to the top dead center during the ...

AI Technical Summary

Problems solved by technology

On the basis of the existing structure, the present invention adds an auxiliary motor on both sides of the generator, and the auxiliary motor and the generator are installed together. Due to the assistance of the auxiliary motor, the generator does not need to perform mode conversion, which solves the problem of generator conversion. Because of the long response time of the motor mode, at the same time, because the auxiliary motor can provide power in time, it avoids the problem of the failure of the piston to reach the designated position due to insufficient power due to misfire, and ensures the stable operation of the free-piston linear generator

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