Free piston type linear generator

Abstract

The invention discloses a free piston type linear generator. The free piston type linear generator comprises a cylinder, a stator and a rotor of a linear motor, wherein a cylinder cover on one side ofthe cylinder is provided with an air inlet valve and an exhaust valve, a piston capable of doing reciprocating motion is arranged in the air cylinder, an air chamber is formed between the piston andthe air inlet valve, and between the piston and the exhaust valve; a push rod fixedly connected with the piston is fixedly connected with the rotor of the linear motor on the other side of the air cylinder, and the rotor reciprocates in an electromagnetic field formed by a stator of the linear motor; the linear motor is connected with an electric energy storage unit, the electric energy storage unit is connected with a control unit, the linear motor works in cooperation with the piston of the internal combustion type air cylinder under the control of the control unit, and is continuously switched in two modes of the motor and the power generator; and when the air cylinder works outwards, the push rod of the piston pushes the stator to cut a magnetic field of the rotor to generate electricpotential to output electric energy outwards, when the piston completes a stroke, the linear motor is controlled by the control unit to be switched to an electromotor mode to drive the rotor to push the push rod, so that the piston enters the compression stroke, and the next working cycle is started.

Description

technical field [0001] The invention belongs to the technical field of power generation and energy storage, in particular to a free-piston linear generator. Background technique [0002] Existing engines, no matter two-stroke or four-stroke, all adopt the crankshaft-connecting rod mechanism to drive the flywheel to store energy, transfer the energy of the working stroke to other strokes, and then drive the piston to complete the entire working cycle. The crankshaft-connecting-rod mechanism solves two major problems: 1. Use the rotational inertia of the flywheel to store energy; 2. The flywheel rotates at a near-uniform speed, guiding the piston to run smoothly with a reciprocating motion close to simple harmonic vibration. However, there are also two major unsolvable problems in the crankshaft-connecting rod mechanism: 1. the piston is strictly constrained in a fixed stroke, and the stroke cannot be changed. Therefore, when the combustion conditions cannot be satisfied, pro...

AI Technical Summary

Problems solved by technology

[0004] The invention provides a free-piston engine and a power generation and energy storage system, which is a new type of internal combustion power generation and energy storage system to solve the problems of bulky and low efficiency of the existing free-piston generators

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