An ultra-high-speed electric air compressor variable voltage stability expansion control system and method for improving the response capability of large-scale speed regulation

Abstract

The invention provides an ultra-high-speed electric air compressor variable voltage expansion and stability control system and method that improves the response capability of large-scale speed regulation. The variable voltage expansion and stability control module is embedded behind the voltage decoupling control module, and the d and q axis voltage The stability range solving subsystem receives the real-time speed signal, real-time d-axis and q-axis current signals, and uses the load excitation matrix value function to identify the current load excitation. The d and q-axis voltage stability range solving subsystem uses the preset motor electromagnetic and mechanical parameters and the identified current load excitation to obtain the d and q axis voltage stability ranges under the current load conditions. According to the d and q axis voltage stability ranges under the current load conditions, the input d, q The decoupling voltage signal of the axis is corrected, and the d and q axis voltage command values ​​are output. The invention enables the ultra-high-speed electric air compressor to effectively resist the influence of load excitation, thereby weakening the excitation of the rotating speed, reducing vibration and noise, and shortening the response time.

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...

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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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