Turbine-type flow rate controlling device

A turbine-type flow rate controlling device, comprising:

• a turbine to convert energy of a fluid flowing in a flow path into rotational movement energy;
• a power generator to convert the rotational movement energy converted by the turbine into electrical energy;
• a setting flow rate receiver configured to receive a setting flow rate, values of which vary due to a load fluctuation of a supply destination of the fluid;
• a flow rate controller configured to estimate an actual flow rate of the fluid flowing in the flow path from a present angular velocity of the turbine and a present torque of the power generator, and calculate a torque of the power generator for which the estimated actual flow rate will correspond to the setting flow rate;
• a position sensor to detect a position of a magnetic pole of a magnet incorporated in the turbine as a magnetic pole position of the turbine;
• a magnetic pole position estimator configured to estimate the position of the magnetic pole of the magnet incorporated in the turbine as the magnetic pole position of the turbine;
• a magnetic pole position selector configured to select one of the magnetic pole position of the turbine detected by the position sensor and the magnetic pole position of the turbine estimated by the magnetic pole position estimator to determine a magnetic pole position of the turbine;
• and
• a power generating controller configured to control the torque of the power generator based on the torque calculated by the flow rate controller and the determined magnetic pole position of the turbine.