Abstract: An elevator system and a brake control circuit include a first switch that controls the electricity supply of the winding of the brake, which switch is connected in a controlled manner with the control of the electricity supply of the winding of the brake, and thus the braking function is controlled.

Abstract: An elevator safety arrangement and a method for implementing safety spaces in an elevator has a mechanical safety device which can be set to a working position to ensure a sufficient safety space in the elevator shaft and an electric safety system for identifying the operating state of the mechanical safety device. An electric safety controller comprises means for measuring the total resistance of a series circuit. The method includes reading the number of landing doors open by means of detectors fitted in conjunction with the landing doors, reading the number of elevator car doors open by means of detectors fitted in conjunction with the elevator car doors, and reading the position of a mechanical safety device by means of detectors fitted in conjunction with the mechanical safety device. If it is established that number of landing doors open is greater than the number of elevator car doors open, then setting the safety system into a ‘person in shaft’ state and preventing operation of the elevator.

Abstract: An elevator system and a method for accelerating the starting of travel in an elevator system are provided. The elevator system includes an elevator control system for implementing controlled motion of an elevator car; a door mechanism control system for implementing controlled movement of the elevator car door; and a door coupler, for forming a mechanical coupling between elevator car door and landing door; and a controller of fast start of travel, which has an input for elevator car position data, an input for landing door position data, an input for car door position data, and at least one output for activating the elevator motor power supply circuit and the elevator brake release circuit.

Abstract: An elevator safety arrangement and a method for implementing safety spaces in an elevator has a mechanical safety device which can be set to a working position to ensure a sufficient safety space in the elevator shaft and an electric safety system for identifying the operating state of the mechanical safety device. An electric safety controller comprises means for measuring the total resistance of a series circuit. The method includes reading the number of landing doors open by means of detectors fitted in conjunction with the landing doors, reading the number of elevator car doors open by means of detectors fitted in conjunction with the elevator car doors, and reading the position of a mechanical safety device by means of detectors fitted in conjunction with the mechanical safety device. If it is established that number of landing doors open is greater than the number of elevator car doors open, then setting the safety system into a ‘person in shaft’ state and preventing operation of the elevator.

Abstract: A fail-safe power control apparatus for supplying power between an energy source (4) and the motor (5) of a transport system is provided. The power control apparatus comprises a power supply circuit (6), which comprises at least one converter (7, 8) containing change-over switches (32). The power control apparatus comprises a control arrangement (24) for controlling the converter change-over switches, a data transfer bus (10), at least two controllers (1, 2) adapted to communicate with each other, and a control arrangement (11) for controlling a first braking device, and possibly a control arrangement (43) for controlling a second braking device.

Abstract: The invention concerns an arrangement and a method for controlling the power supply of the load of an elevator system. The arrangement has at least a monitoring unit and at least one controllable power source. The controllable power source is connected between the load of an elevator system and the monitoring unit such that the power supply of the load of the elevator system can be controlled by means of a control signal transmitted to the controllable power source by the monitoring unit. The monitoring unit according to the invention contains at least one input for determining the status of at least one safety switch of the elevator system. On the basis of the status of the safety switch a control signal either having pulses or being in a static state is sent with the monitoring unit to at least one controllable power source.

Abstract: An elevator safety arrangement and a method for implementing safety spaces in an elevator has a mechanical safety device which can be set to a working position to ensure a sufficient safety space in the elevator shaft and an electric safety system for identifying the operating state of the mechanical safety device. According to the method of the invention, detectors in the electric safety system are read by an electric safety controller and, when a functional deviation is detected, one or more stopping devices are actuated to bring the elevator system into a safe operating state.

Abstract: The invention relates to a safety arrangement of an elevator and a method for implementing safety spaces in an elevator shaft. The elevator has an elevator control system, an elevator motor, a power supply circuit of the elevator motor, and at least one mechanical stopping appliance for preventing movement of the elevator car in the elevator shaft. In the method according to the invention information is read with the control unit from the sensors that measure the position of the landing door of the elevator and possibly information is read from the sensors that measure the position of the door of the elevator car. If it is detected that more landing doors than the door of the elevator car are open, the control unit is switched to the person in the elevator shaft mode and information about the person in the elevator shaft mode is sent with the control unit to the elevator control system.

Abstract: The invention relates to a switch arrangement of an electric motor drive (1). The electric motor drive comprises safety switches (3) determined by the safety of the drive, a controlled mechanical brake (4), a power supply circuit (5) of the brake control, a power converter (6), which power converter comprises a network rectifier (7) and a power rectifier (8) of the motor. The power rectifier of the motor is at least partly implemented with controlled semiconductor switches (9, 10) arranged into a bridge. The power converter comprises an intermediate circuit (11, 12) between the network rectifier and the power rectifier of the motor. The switch arrangement comprises normally-open switches (13, 14) in the intermediate circuit of the power converter (6).

Abstract: An electronic unintended movement governor is disclosed, which includes an input for car position data, a device for determining the speed of the elevator car, a plurality of limit values for permitted movement of the elevator car, such as the limit value of the maximum permitted speed of the elevator car, and which unintended movement governor also provides overspeed monitoring for controlling at least one stopping appliance of the elevator car when the speed of the elevator car exceeds the limit value of the maximum permitted speed. The unintended movement governor includes at least two separate controls for controlling a stopping appliance of the elevator car. Additionally, a method for controlling the aforementioned electronic unintended movement governor is disclosed.

Abstract: A control circuit for controlling an electromechanical elevator brake is disclosed. The control circuit includes at least one brake coil (L1), a direct-voltage source (BR1), a semiconductor switch arrangement, a current measuring unit, at least two semiconductor switches, and a control unit (CO1) for controlling operation of the circuit. The current measuring unit (Lm1) produces current data that is passed to the control unit (CO1). The at least two semiconductor switches (SW1, SW2) are controlled by the control unit (CO1) such that operation is alternated between the two so that the working condition of each switch can be checked in its turn on the basis of feedback data obtained from the current measuring unit.

Abstract: The invention relates to a fail-safe power control apparatus (3) for supplying power between an energy source (4) and the motor (5) of a transport system. The power control apparatus comprises a power supply circuit (6), which comprises at least one converter (7, 8) containing change-over switches (32), and the power control apparatus comprises means (24) for controlling the converter change-over switches, a data transfer bus (10), at least two controllers (1, 2) adapted to communicate with each other, and a control arrangement (11) for controlling a first braking device, and possibly a control arrangement (43) for controlling a second braking device.

Abstract: The invention relates to a fail-safe power control apparatus (3) for supplying power between an energy source (4) and the motor (5) of a transport system. The power control apparatus comprises a power supply circuit (6), which comprises at least one converter (7, 8) containing controllable change-over switches (32), and the power control apparatus comprises means (24) for controlling the converter change-over switches, a data transfer bus (10), at least two controllers (1, 2) adapted to communicate with each other, and a control arrangement (11) for controlling a first braking device, and possibly a control arrangement (43) for controlling a second braking device.

Abstract: The invention relates to an elevator safety arrangement and a method for implementing safety spaces in an elevator shaft. The safety arrangement of the invention comprises a mechanical safety device which can be set to a working position to ensure a sufficient safety space in the elevator shaft and an electric safety system for identifying the operating state of the mechanical safety device. According to the method of the invention, detectors comprised in the electric safety system are read by an electric safety controller and, when a functional deviation is detected, one or more stopping devices are actuated to bring the elevator system into a safe operating state.

Abstract: The invention relates to an electronic unintended movement governor, which comprises an input for car position data, means for determining the speed of the elevator car, a plurality of limit values for permitted movement of the elevator car, such as the limit value of the maximum permitted speed of the elevator car, and which unintended movement governor also comprises overspeed monitoring for controlling at least one stopping appliance of the elevator car when the speed of the elevator car exceeds the limit value of the maximum permitted speed. The unintended movement governor comprises at least two separate controls for controlling a stopping appliance of the elevator car. Additionally, the invention relates to a method for controlling the aforementioned electronic unintended movement governor.

Abstract: The invention relates to a safety arrangement of an elevator and a method for implementing safety spaces in an elevator shaft. The elevator comprises an elevator control system, an elevator motor, a power supply circuit of the elevator motor, and at least one mechanical stopping appliance for preventing movement of the elevator car in the elevator shaft. In the method according to the invention information is read with the control unit from the sensors that measure the position of the landing door of the elevator and possibly information is read from the sensors that measure the position of the door of the elevator car. If it is detected that more landing doors than the door of the elevator car are open, the control unit is switched to the person in the elevator shaft mode and information about the person in the elevator shaft mode is sent with the control unit to the elevator control system.

Abstract: The invention relates to a safety arrangement of an elevator system and to a method for ensuring safety in an elevator system. The safety arrangement comprises at least one mechanical stopping appliance and the control of the safety arrangement comprises at least one limit value that sets the speed, deceleration or permitted vertical distance from the door zone of the elevator car. In the method for ensuring safety in an elevator system at least one mechanical stopping appliance is fitted to the safety arrangement of the elevator system and at least one limit value that sets the speed, deceleration or permitted vertical distance from the door zone of the elevator car is set for the control of the safety arrangement.

Abstract: Example embodiments relate to a method and a system for integrating electric elements of an elevator in a single module, e.g. in the door operator of the elevator, to reduce the number of components to be installed and to enable the electric elements of the elevator to be added to the door operator on the elevator car already at the manufacturing stage. The method may include intergrating electric components to be placed in the elevator, such as location elements, acceleration sensors and door zone sensors, with the door operator or some other module already at the manufacturing stage of the elevator, e.g. by placing the active parts of the sensors in conjunction with the door operator and the passive parts on the floor level side.

Abstract: A safety system for supervising safety of an elevator may include a safety space in an elevator shaft, elevator buffers in the elevator shaft, or both; measuring means for continuous measurement of absolute position of an elevator car; and a safety device. If the safety system includes the safety space, its size may be reduced. If the safety system includes the elevator buffers, their size may be reduced. The safety device may be adapted to receive data about the absolute position of the elevator car; calculate a velocity of the elevator car at each instant of time using the absolute position; monitor the calculated velocity in order to ensure that the calculated velocity remains within an allowed motion limit curve; and control at least one stopping device for stopping uncontrolled motion of the elevator car if the calculated velocity exceeds the allowed motion limit curve.

Abstract: The present invention discloses an arrangement and a method for controlling the power supply of the load of an elevator system. The arrangement comprises at least a monitoring unit (40) and at least one controllable power source (41), which controllable power source (41) is fitted between the load (2, 12, 13) of the elevator system and the monitoring unit (40) such that the power supply of the load (2, 12, 13) of the elevator system can be controlled by means of a control signal transmitted to the controllable power source (41) by the monitoring unit (40). The monitoring unit (40) according to the invention contains at least one input for determining the status of at least one safety switch (11) of the elevator system. On the basis of the status of the safety switch a control signal (47) either comprised of pulses or in a static state is sent with the monitoring unit (40) to at least one controllable power source (41).