In one embodiment, a system includes a linear induction motor (LIM) installed in a curved portion of a track, a ride vehicle disposed upon the track, one or more reaction plates coupled to a side of the ride vehicle facing the track via a plurality of actuators, one or more sensors configured to monitor an air gap between the one or more reaction plates and the LIM, and a processor configured to determine which of the plurality of actuators to actuate and a desired performance of each of the plurality of actuators based on data received from the one or more sensors to maintain the air gap at a desired level throughout traversal of the curve by the ride vehicle.

Method for controlling a dynamic linear motor. Method includes defining a path over which a rotor is to travel, placing stator segments at least along portions of the path where the rotor may be one of accelerated and decelerated and supplying a variable amplitude and frequency of voltage to power the stator segments in a synchronized manner so that, as the rotor approaches stator segments, the stator segments are powered and, as the rotor departs stator segments, the stator segments are depowered.

A method of operating a drive circuit for parallel electric motors is provided. The method includes receiving measurements of stator phase currents in the parallel electric motors. The method includes selecting a target PM motor, from among the parallel electric motors, that generates a largest torque output. The method includes executing a vector control algorithm to generate a complex command voltage vector for the target PM motor. The method includes generating and transmitting a pulse width modulation (PWM) signal based on the complex command voltage vector for controlling an inverter. The method includes operating the inverter according to the PWM signal to supply three-phase alternating current (AC) power to the parallel electric motors.

A method of operating a drive circuit for parallel electric motors is provided. The method includes receiving measurements of stator phase currents in the parallel electric motors. The method includes selecting a target PM motor, from among the parallel electric motors, that generates a largest torque output. The method includes executing a vector control algorithm to generate a complex command voltage vector for the target PM motor. The method includes generating and transmitting a pulse width modulation (PWM) signal based on the complex command voltage vector for controlling an inverter. The method includes operating the inverter according to the PWM signal to supply three-phase alternating current (AC) power to the parallel electric motors.

The present disclosure relates to an inverter provided in a hoist system, which includes a scale unit configured to control a size of a DC link voltage of the inverter, a proportional-integral (PI) controller configured to perform PI-control on an output of the scale unit and an output voltage of the inverter and outputting a control signal, a first calculating unit configured to sum a command frequency of the inverter and the control signal, and a voltage determining unit configured to determine an output voltage of the inverter from an output frequency of the first calculating unit.

The present disclosure relates to an inverter provided in a hoist system, which includes a scale unit configured to control a size of a DC link voltage of the inverter, a proportional-integral (PI) controller configured to perform PI-control on an output of the scale unit and an output voltage of the inverter and outputting a control signal, a first calculating unit configured to sum a command frequency of the inverter and the control signal, and a voltage determining unit configured to determine an output voltage of the inverter from an output frequency of the first calculating unit.

A full-bridge circuit module with an over-temperature protection mechanism for driving an inductive load includes a full-bridge circuit and a comparator module. When the over-temperature protection mechanism is triggered, four switching transistors of the full-bridge circuit are turned off, and two body diodes of corresponding twos of the four switching transistors which are electrically connected to each other via the inductive load are conductive to form a load current flowing through the inductive load. When the load current causes a first output voltage of a first output terminal of the full bridge circuit to drop to a first comparison voltage and causes a second output voltage of a second output terminal of the full bridge circuit to reach a second comparison voltage, the comparator module controls the corresponding twos of the four switching transistors which are electrically connected to each other via the inductive load to be turned on.

A full-bridge circuit module with an over-temperature protection mechanism for driving an inductive load includes a full-bridge circuit and a comparator module. When the over-temperature protection mechanism is triggered, four switching transistors of the full-bridge circuit are turned off, and two body diodes of corresponding twos of the four switching transistors which are electrically connected to each other via the inductive load are conductive to form a load current flowing through the inductive load. When the load current causes a first output voltage of a first output terminal of the full bridge circuit to drop to a first comparison voltage and causes a second output voltage of a second output terminal of the full bridge circuit to reach a second comparison voltage, the comparator module controls the corresponding twos of the four switching transistors which are electrically connected to each other via the inductive load to be turned on.

For a long stator linear motor comprising a switch and secure guidance of the transport vehicles in the direction of movement along the transport track, it is provided that the transport vehicle (Tn) is force-guided, at least in sections, in the direction of movement (x) outside the switch (W), and at least one one-sided track section (2d) is provided on the transport track (2), along which a vehicle guide element (7) only on one side of the transport track (2) interacts with the track guide element (6) on the assigned side of the transport track (2) for the mechanical forced guidance in the direction of movement (x), and the forced guidance in the direction of movement (x) in the transverse direction (y) is canceled in the region of the switch (W).

Method and device for controlling the electrical variables and/or LLM currents of LLM coils of an LLM stator, the movement of a first transport unit is controlled by an associated first transport controller, the movement of a second transport unit is controlled by an associated second transport controller, and a control unit checks whether the first transport controller intends to specify a first controlled variable for an LLM coil and whether the second transport controller simultaneously intends to specify a second controlled variable to the same LLM coil. In this case, either an additional controlled variable, which is derived from the first controlled variable and/or the second controlled variable using a predetermined function f (Ux=f(Ux, Ux), or Ux=f(Ux) or Ux=f(Ux)), is specified for the LLM coil, or the coil terminals of the LLM coil (Lx) are short-circuited.