Establishment method of compression cavity state estimation equivalent model of scroll air compressor

• Main Authors: OU KAI, ZHANG ZHIHONG, WANG YAXIONG, CAI ZENAN, YE WANGCHENG
• Format: Patent
• Language: Chinese; English
• Published: 05.12.2023
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; PHYSICS

The invention relates to a method for constructing an equivalent model for state estimation of a compression cavity of a scroll air compressor. According to the method, on the basis of the idea of circuit comparison, the pressure difference between compression cavities of the air compressor and the rotating speed of the scroll plate are respectively compared with voltage and current in a circuit model, so that compression cavity internal state parameters related to the volume of the compression cavities of the scroll plate and the change rate of the volume can be represented as capacitance, resistance, capacitance and resistance in an RC link; the compression and exhaust process of the control volume of the compression cavity is approximately equivalent to a circuit dynamic process with variable capacitance and resistance, a leakage correction coefficient is introduced by referring to a nozzle flow model, and a state equation and an observation equation for state estimation equivalent model discretization of