The present invention relates to the field of elevator braking, in particular to an action state detection method and system for an elevator brake, comprising: acquiring matching pairs of brake linings in the same braking state; constructing normal record data sets based on the matching pairs; grouping the normal record data sets based on braking power corresponding to samples in the normal record data sets to determine a median of elevator running speed corresponding to the samples in each group; dividing the operating state levels of the elevator brake according to the size of the median; constructing a data training set; training a constructed network model to obtain a trained network model; acquiring the operating state levels of an elevator to be detected by the trained network model, evaluating the elevator brake according to the operating state levels, and controlling the elevator.

An electrical converter unit and a method for reducing thermal stress of a power semiconductor switch, such as an IGBT, of an electrical converter unit, the electrical converter unit comprising at least a gate control circuit wherein the electrical converter unit controls an electrical motor. The method comprises determining load and estimating required motor current based on the determined load and/or a predetermined speed profile. The electrical converter unit has at least a first operating state and a second operating state. The second operating state is used if predetermined criteria is fulfilled, the predetermined criteria relating to at least one of the following: estimated required current, measured motor speed, temperature of the power semiconductor switch and/or electrical converter unit, temperature model of the power semiconductor switch and/or electrical converter unit. In the second operating state a lower switching frequency of the power semiconductor switch is used than in the first operating state, and in the second operating state a higher switching speed of the power semiconductor switch is used than in the first operating state.

A method for controlling an elevator includes controlling the speed of a vertically moving elevator car during its run from a starting landing to a destination landing according to speed settings, the speed settings defining a constant target speed for the elevator car. The method includes obtaining measurement data of the ongoing run, which measurement data describes vertical speed and/or vertical acceleration of the vertically moving elevator car, determining whether the measurement data meets one or more predetermined criteria indicating unintended vertical speed and/or unintended vertical acceleration, and changing the speed settings of the current run by lowering the constant target speed from a first constant target speed to a second constant target speed if the measurement data meets said one or more predetermined criteria, continuing the run without intermediate stops to said destination landing. An elevator is provided to implement the method.

An illustrative example elevator system includes an elevator car and a valve assembly that selectively directs fluid flow to control movement of the elevator car. At least one sensor provides an indication of a current status of the elevator car, which includes at least a position of the elevator car or a speed of the elevator car. A processor receives the indication from the at least one sensor and adjusts operation of the valve assembly when the current status of the elevator car is different than a predetermined desired status.

An elevator system includes an elevator car; a guide rail; and a linear synchronous reluctance motor including: a primary circuit having a plurality of primary poles and windings about the primary poles; a secondary circuit having a plurality of secondary poles; the primary circuit coupled to one of the elevator car and the guide rail, the secondary circuit coupled to the other of the elevator car and the guide rail.

A system for targeting, remotely accessing, and assuming control of a specific vehicles computer with the intent to disrupt both accelerator and/or transmission functions. This includes the ability for emergency responders to target a specific vehicle to establish wireless communication with the vehicles control module to gain access to vehicle systems. This further includes the transfer of information between the emergency responder and the specific vehicle to include make, model, VIN, interrupt code, etc. If the specific vehicle is deemed in violation of highway safety regulations, a manufacturer pre-programmed interrupt code may be used to assume control of a limited set of the vehicle computer functions inclusive of acceleration and transmission. In the event an interrupt code is received by the specific vehicle, the vehicles computer will automatically lockout driver input commands from the accelerator and/or transmission gear shift, cause the transmission to shift to neutral and/or cause the deceleration of the vehicle, and maintain this state until the vehicle safely comes to a stop and a reset code is entered. In this way the engine is left running to allow the driver of the specific vehicle to maintain control of the vehicles critical systems including but not limited to hydraulics, power steering, stability control etc.

An elevator system includes a first propulsion system for imparting linear motion to an elevator car. The elevator system includes a controller generating control signals for the first propulsion system. The elevator system includes a brake for holding the elevator car. The elevator system includes an energy storage unit. The elevator system includes a second propulsion system. The controller is configured to at least one of (i) access the energy storage unit to power at least one of the first propulsion system and second propulsion system upon a fault during upward travel of the elevator car (ii) power the second propulsion system upon a fault in the first propulsion system during upward travel of the elevator car and (iii) delay applying the brake until the elevator car speed is less than a threshold upon a fault during upward travel of the elevator car.

A method of operating an elevator system is provided. The method comprising: detecting an occupancy status of the elevator car, the occupancy status comprising at least one of occupied and unoccupied; selecting a motion profile of the elevator car in response to the occupancy status, the motion profile comprising at least one of an unoccupied motion profile, an occupied motion profile, an occupied lateral movement motion profile, a power-save motion profile, and an occupied descent motion profile; and moving the elevator car in accordance with the motion profile selected.

An elevator safety system for an elevator system (2) with an elevator car (12), which is movable along a hoistway (4), comprises: at least one position sensor (25), which is configured for determining a position value representing the position of the elevator car (12) within the hoistway (4); a limit setting unit (32), which is configured for determining an operation status of the elevator system (2) and for setting at least one position limit according to the determined operation status of the elevator system (2); and a comparison unit (34), which is configured for comparing the position value with the position limit and for determining an unsafe condition of the elevator system (2) if the position value is not in compliance with the at least one position limit.

An elevator safety system comprises: at least one position sensor, which is configured for determining a position value representing the position of the elevator car within the hoistway; at least one door sensor, which is configured for detecting whether the at least one door is closed; a limit setting unit, which is configured for determining an operation status of the elevator car and for setting at least one position limit according to the determined operation status; and a comparison unit, which is configured for comparing the determined position value with the set position limit and for determining an error condition, if the position value is not in compliance with the at least one position limit and the at least one door sensor indicates that at least one door is not closed.