Ultra-high-speed electric air compressor variable-voltage stability expansion control system and method for improving large-range speed regulation response capacity

Abstract

The invention provides an ultra-high-speed electric air compressor variable-voltage stability expansion control system and method for improving the large-range speed regulation response capacity. Themethod comprises the steps: embedding a variable-voltage stability expansion control module behind a voltage decoupling control module, and enabling a d-axis voltage stability range solving subsystemand a q-axis voltage stability range solving subsystem to receive real-time rotating speed signals and real-time d-axis and q-axis current signals; employing a load excitation matrix value function for identifying current load excitation, enabling the d-axis and q-axis voltage stability range solving subsystem to obtain d-axis and q-axis voltage stability ranges under the current load condition byusing preset motor electromagnetic and mechanical parameters and the identified current load excitation, and according to the d-axis and q-axis voltage stability ranges under the current load condition, enabling a track positioning control subsystem and a track migration control subsystem to correct the input d-axis and q-axis decoupling voltage signals and output d-axis and q-axis voltage instruction values. According to the invention, the ultrahigh-speed electric air compressor can effectively resist the influence of load excitation, so the rotating speed excitation is weakened, the vibration noise is reduced, and the response time is shortened.

Description

technical field [0001] The invention belongs to the field of expansion and stability control of ultra-high-speed electric air compressors, and in particular relates to an ultra-high-speed electric air compressor variable voltage expansion and stability control system and method for improving the response capability of large-scale speed regulation. Background technique [0002] The ultra-high-speed electric air compressor is an essential core component of the fuel cell system, which provides sufficient air for the fuel cell system and ensures the power output of the fuel cell system. However, when the ultra-high-speed electric air compressor speeds up in a wide range, the sudden change in speed will cause a sharp increase in the internal flow rate of the centrifugal turbocharger device, and the instability of the outlet gas flow will increase, increasing the gas flow rate inside the centrifugal turbocharger device, making the load The amplitude and frequency of the stimulus r...

AI Technical Summary

Problems solved by technology

The problem with this patent is that the speed control is simply based on the power demand, and the speed excitation of the ultra-high-speed air compressor under the influence of load excitation is not considered in the speed control. The vibration noise is large and the response time is long.

This method pays attention to the response of the speed control of the ultra-high-speed air compressor, but there are still the following problems: when the ultra-high-speed electric air compressor performs large-scale rapid speed regulation in the ultra-high-speed range, the mode switching has been unable to control the load excitation. Excited by a high speed, it can only ensure stable operation in low speed and small load areas

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