Smart Lungmotor: Active Exhalation Valve
Abstract
Active exhalation valve is the structural element of ventilator, which is designed to maintain target pressure in the airways and at the same time to allow for control of the spontaneous breathing of the patient during the inspiratory phase of ventilation to control the pressure.
Drive design active exhalation valve is a linear DC motor with built in his body permanent magnet and a Hall sensor. To select the optimal size of the design elements of the engine within the reach the desired result, a technical solution to the problem of optimization, prior to which, however, should assess the impact of individual structural elements of the engine efficiency and performance of the machine, which will determine the dependent and independent variables (size of the structural elements) for the subsequent formulation and solution of the problem of optimal design.
The method of calculation of the field problem in the software package Maxwell examines the influence of these parameters (dimensions of structural elements) as the diameter and height of the magnet, the thickness and height of the coil. For comparing the calculated level of availability and performance. Among the elements of the design of the linear DC motor of the type considered most effective impact, in terms of availability and performance, providing an increase in the diameter of the magnet, while the smallest effect is achieved at the height of the coil. Thus, the preliminary assessment can be argued that in the case of selecting the performance as a criterion of quality, optimal design is achieved by increasing the parameters of the magnet to the maximum at the minimum height of the coil. Therefore, in accordance with a certain optimality criterion, the analysis makes it possible to estimate the likely path optimization.
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