Electric turbocharger

Abstract

The invention relates to an electric turbocharger which comprises a radial electromagnetic bearing, a radial electromagnetic bearing control circuit, an axial electromagnetic bearing, an axial electromagnetic bearing control circuit, a motor generator, a clutch device and a clutch control system. The motor generator, the clutch device, the radial electromagnetic bearing and the axial electromagnetic bearing are located in a space formed by an intermediate, a compressor back plate and a turbine shell and disposed around a turbine rotor. The clutch device is used for controlling combination and separation of the motor generator and the turbine rotor. The motor generator and the clutch device are controlled by the clutch control system. The radial electromagnetic bearing is controlled by the radial electromagnetic bearing control circuit. The axial electromagnetic bearing is controlled by the axial electromagnetic bearing control circuit. By the electric turbocharger, active control of dynamic features of a bearing-rotor system is realized, lubricating oilway is omitted, airtightness is achieved, mechanical efficiency of turbochargers is improved, utilization rate of waste gas is increased, and turbine lag is solved.

Description

technical field [0001] The invention belongs to the field of vehicle power machinery, and in particular relates to an electric turbocharger equipped with an electromagnetic bearing and a clutch device for controlling the combination and separation of a motor generator and a turbine rotor. Background technique [0002] Turbocharging is one of the most important technical measures for internal combustion engine strengthening, energy saving and environmental protection. The engine turbocharger uses the exhaust gas energy discharged from the engine to drive the turbine, and the turbine drives the coaxial compressor to do work on the air, sending compressed air into the engine cylinder, increasing the air charge coefficient without increasing the engine cylinder volume, so that The engine injects more fuel, thereby increasing the engine output power, improving combustion, achieving the purpose of strengthening the engine and reducing emission pollution. Compared with naturally a...

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Problems solved by technology

[0008] In order to overcome the deficiencies of the existing technology, improve the mechanical efficiency of the turbocharger, solve the problem of excessive vibration of the rotor, and the excessive rotational inertia of the turbine rotor caused by the motor generator device, etc., the waste gas energy utilization rate is low and the speed cannot be further increased problem, the present invention proposes an electric turbocharger with an electromagnetic bearing, a motor-generator and a clutch

The electric turbocharger can (1) realize the active control of the dynamic characteristics of the bearing-rotor system; (2) improve the mechanical efficiency of the turbocharger; (3) save complex lubricating oil circuits and sealing problems, The turbocharger does not need to consume oil and simplifies the structure; (4) Reduce the mass of the turbocharger rotor and improve the utilization rate of exhaust gas energy; (5) Solve the problem of turbo lag

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