| 摘要 |
PURPOSE:To enable the control of flow rate with high accuracy and response, by providing two pairs of coil-energized fixed poles in upper, lower, right and left positions around a rotor magnetized in the radial direction and by modifying the electric inputs to the fixed poles to set the rotational angle of the rotor and by interlocking the rotor with a valve spindle. CONSTITUTION:A rotor 2 has magnetic pole faces P1, P2 at both the ends in the radial direction. A first and a second fixed cores FC1, FC2 are placed around the rotor 2 and provided with coils CL1, CL2 and switches SW1, SW2 for supplying electricity to the coils. A variable resistor VR1 is connected to the coil CL2. When the switch SW1 is turned on, the rotor 2 is stopped in a position of 0 deg.. When the switch SW2 is turned on, the rotor 2 is located in an optional angle position from 0 to 45 deg. depending on the resistance of the variable resistor VR1. Therefore, the rotor 2 is used to control the opening and closing position of a valve. |
