TURBINE-TYPE FLOW RATE CONTROLLING DEVICE

摘要

A power generating portion formed of a rotor and a stator is provided. The rotor is formed of a ring incorporating a permanent magnet and an impeller. The rotor is regarded as a turbine. An actual flow rate is estimated from a present angular velocity of the turbine and a present torque of the power generating portion, a torque of the power generating portion in which the estimated actual flow rate corresponds to a setting flow rate is calculated and the torque of the power generating portion is controlled based on the calculated torque and a magnetic pole position of the turbine. A measured value detected by a position sensor is used as the magnetic pole position of the turbine, however, when it is determined that reliability does not exist in the position sensor, an estimated value is used.

主权项

1. A turbine-type flow rate controlling device comprising:
a turbine converting energy of a fluid flowing in a flow path into rotational movement energy; a power generator converting the rotational movement energy converted by the turbine into electrical energy; a setting flow rate input inputting a setting flow rate values of which vary due to load fluctuation of a supply destination of the fluid; a flow rate controller estimating 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 calculating a torque of the power generator in which the estimated actual flow rate corresponds to the setting flow rate; a position sensor detecting 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 estimating 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 selecting any 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; and a power generating controller controlling the torque of the power generator based on the torque calculated by the flow rate controller and the magnetic pole position of the turbine selected by the magnetic pole position selector.