Controller for ropeless elevator

A ropeless elevator controller for a ropeless elevator wherein a plurality of primary windings are arranged in an elevator hoistway on a building side of the hoistway and wherein a magnetic field generating device is provided on an elevator car side, the car being caused to ascend or descend by generating a shifting magnetic field in the primary windings through an inverter, said ropeless elevator controller comprising:

• a cross induction line cable arranged along the elevator hoistway on the building side;
• excitation means which is provided on the car side for generating sinusoidal waves for positional detection in said cross induction line cable;
• movement amount detecting means which is provided on the car side for detecting an amount of movement of the car;
• data calculating means which is provided on the car for calculating data on car speed and on a magnetic pole phase of the magnetic field generating device on the basis of the amount of movement detected by said movement amount detecting means;
• data transmission means which is provided on the car and which utilizes said cross induction line cable for transmitting the data calculated by said data calculating means to the building side;
• an induction radio circuit which is provided on the building side and which receives the data transmitted from said data transmission means by utilizing said cross induction line cable and calculates an initial phase of the magnetic field generating device provided on the car from the sinusoidal waves generated in said cross induction line cable;
• and
• an inverter control circuit which is provided on the building side and which interpolates the initial phase calculated by said induction radio circuit on the basis of the magnetic pole phase received by said induction radio circuit and controls the inverter on the basis of the interpolated phase and the data on car speed received by said induction radio circuit.