Design method of a low-vibration and noise new energy passenger car motor test bench

Abstract

The invention provides a design method of a low-vibration noise test bench for the motor of a new energy passenger vehicle. The design method comprises the following steps that: a bench model is built, wherein the bench model includes a bottom plate, a pair of L-shaped supporting plates, a pair of rear brackets and a vibration isolator system, wherein the L-shaped supporting plates and the rear brackets are arranged on the bottom plate, and the vibration isolator system is arranged below the bottom plate; a test motor and a loading motor are installed on the L-shaped supporting plates and the rear brackets, the output shaft of the loading motor is connected with a torsion sensor and then is connected with the rotating shaft of the test motor; and a target function and a constraint condition are set, so that the structure of the motor bench is optimized, and the design of the motor bench is completed. Compared with the prior art, the test bench designed by the design method of the invention is advantageous in that the test bench can be used to normally carry out the performance and NVH test of the motors of new energy vehicles; and the optimized test bench further has the advantages of low vibration and small noise with the constraint condition and target function set.

Description

technical field [0001] The invention belongs to the technical field of new energy vehicle testing, and in particular relates to a design method for a low-vibration and noise new energy passenger vehicle motor test bench. Background technique [0002] New energy vehicle motor manufacturers and new energy vehicle passenger vehicle manufacturers test personnel when building a bench for motor performance tests and motor NVH tests under various working conditions, they found that under some working conditions, not only the motor itself Resonance, and the test motor is easy to excite the coupling resonance of the supporting foundation, resulting in great noise. The main reason is that the motor manufacturers and automobile manufacturers did not design the system dynamics of the motor test bench, and there was no effective vibration isolation device designed between the motor test bench and the supporting foundation. Contents of the invention [0003] The purpose of the present ...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the defects of the prior art, in order to solve the problem of effectively eliminating the vibration and noise caused by the resonance of the bench, to propose a design method for the motor test bench of a new energy passenger car with low vibration and noise, using the method of the present invention The designed test bench can effectively reduce the vibration and noise problems caused by the resonance of the bench

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