Energy feedback suspension system and control method

Abstract

The invention discloses an energy feedback suspension system and a control method. An energy feedback suspension is formed by connecting a spring and a linear motor in parallel, an energy feedback loop is formed by connecting a bridge rectifier and a direct current converter in series, and the direct current converter is composed of an inductor, a diode and two MOS tubes. According to the control requirement of the suspension system, electromagnetic damping force Fref needing to be provided by the linear motor is calculated, electromagnetic damping force FN generated when the suspension vibrates and the linear motor charges an energy storage component directly through the bridge rectifier under the condition that the energy feedback loop does not comprise the direct current converter, the Fref and FN are compared, the direct current converter is controlled to work in the step-up mode or in the step-down mode, and then the linear motor generates electromagnetic damping force; the control over the electromagnetic damping force of the linear motor is converted into control over the current of a three-phase winding of the linear motor, and the dead zone generated when the energy feedback voltage is smaller the voltage threshold of the energy storage component in the vibration process of the suspension is eliminated.

Description

technical field [0001] The invention belongs to the technical field of vehicle energy saving and emission reduction, and in particular relates to a vehicle energy-feeding suspension system and a control method. Background technique [0002] The energy-feeding suspension of the vehicle can convert the vibration energy caused by the uneven road excitation into electric energy and store it, which is an important measure for energy-saving and emission-reduction of vehicles. When the converted electric energy is stored, only when the energy feeding voltage is greater than the terminal voltage of the energy storage element can a positive potential difference be generated in the circuit for charging. However, under normal circumstances, when the car is running on a good road at a low speed, the energy feeding voltage of the suspension system is low. When the voltage is lower than the voltage of the energy storage element, no current will be generated in the circuit, and a "dead zon...

AI Technical Summary

Problems solved by technology

[0003] In the existing technical schemes, most of them start from the mechanical structure and propose a series of schemes to recover the vibration energy of the suspension and convert it into other forms of energy storage. For the energy-feed suspension system, how to convert the low energy-feed voltage The core issues such as storage, how to eliminate the dead zone phenomenon, and how to coordinate and control the vibration damping performance of the energy-feeding suspension system and the energy-feeding performance are relatively few. The additional problems generated have also become an important factor restricting the large-scale application of the energy-feeding suspension

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