Abstract:
The invention relates to a brake controller (7), an elevator system and also a method for performing an emergency stop. The brake controller (7) comprises an input (29A, 29B) for connecting the brake controller to the DC intermediate circuit (2A, 2B) of the frequency converter driving the hoisting machine of the elevator, an output (4A, 4B) for connecting the brake controller (7) to the electromagnet (10) of the brake, a switch (8A, 8B) for supplying electric power from the DC intermediate circuit (2A, 2B) of the frequency converter driving the hoisting machine of the elevator via the output (4A, 4B) to the electromagnet (10) of a brake (9), and also a processor (11) with which the operation of the brake controller (7) is controlled by producing control pulses in the control pole of the switch (8A, 8B) of the brake controller.
Abstract:
The invention relates to an elevator system (1), which comprises control appliances (2, 3, 4, 5, 6, 7, 8, 9, 10) of the elevator system fitted to communicate between themselves. The elevator system comprises a control arrangement (11) for placing at least one control appliance into standby mode or for terminating the standby mode. The control arrangement is fitted to set the standby mode on the basis of at least one activation signal, as well as to send a control signal (21) of the standby mode to at least one control appliance of the elevator system. The invention also relates to a method for fitting a standby mode into an elevator system.
Abstract:
The invention relates to the drive device (1) of an elevator. The drive device comprises a DC bus (2A, 2B), a motor bridge (3) connected to the DC bus for the electricity supply of the elevator motor (6), which motor bridge (3) comprises high-side (4A) and low-side (4B) switches for supplying electric power from the DC bus (2 A, 2B) to the elevator motor (6) when driving with the elevator motor (6), and also from the elevator motor (6) to the DC bus (2A, 2B) when braking with the elevator motor (6), a control circuit (5) of the motor bridge, with which control circuit the operation of the motor bridge (3) is controlled by producing control pulses in the control poles of the high-side (4A) and low-side (4B) switches of the motor bridge, a brake controller (7). which comprises a switch (8A, 8B) for supplying electric power, to the control coil (10) of an electromagnetic brake (9), a brake control circuit (11), with which the operation of the brake controller (7) is controlled by producing control, pulses in the control pole of the switch (8 A, 8B) of the brake controller, an input circuit (12) for the safety signal (13) to be disconnected/connected from outside the drive device, drive prevention logic (15), which is connected to the input circuit (12) and is configured to prevent the passage of control pulses to the control poles of the high- side (4 A) and/or Jow-side (4B) switches of the motor bridge when the safety signal (13) is disconnected, and also brake drop-out logic (16), which is connected to the input circuit (12) and is configured to prevent passage of the control pulses to the control pole of the switch (8A, 8B) of the brake controller when the safety signal (13) is disconnected.
Abstract:
The invention relates to a safety arrangement of an elevator, which comprises sensors (27, 28) configured to indicate functions that are critical from the viewpoint of the safety of the elevator, and also a safety circuit (20, 34), with which the data formed by the aforementioned sensors (27, 28) indicating the safety of the elevator is read. The safety arrangement comprises a drive device (1) for driving the hoisting machine of the elevator. The drive device (1) comprises a DC bus (2 A, 2B), and also a motor bridge (3) connected to the DC bus for the electricity supply of the elevator motor (6). The motor bridge (3) comprises high- side (4A) and low-side (4B) switches for supplying electric power from the DC bus (2A, 2B) to the elevator motor (6) when driving with the elevator motor (6). and also from the elevator motor (6) to the DC bus (2A, 2B) when braking with the elevator motor (6). The drive device also comprises a control circuit (5) of the motor bridge, with which control circuit the operation of the motor bridge (3) is controlled by producing control pulses in the control poles of the high-side (4A) and low-side (4B) switches of the motor bridge, an input circuit (12) for a safety signal (13), which safety signal ( 13) can be disconnected/connected from outside the drive device (1), and also drive prevention logic (15), which is connected to the input circuit (12) and is configured to prevent the passage of control pulses to the control poles of the high- side (4 A) and/or low-side (4B) switches of the motor bridge when the safety signal ( 13) is disconnected. The signal conductor of the safety signal (13) is wired from the safety signal (20, 34) to the drive device (1), and the safety circuit (20, 34) comprises means (14) for disconnecting/connecting the safety signal (13). The safety circuit (20, 34) is arranged to bring the elevator into a state preventing a run by disconnecting the safety signal ( 13), and the safety circuit (20, 34) is arranged to remove the state preventing a run by connecting the safety signal (13).
Abstract:
A procedure for determining the parameters for an electric drive controlling a synchronous elevator motor with permanent magnets, a computer controlling the operation of the electric drive being provided with a control model describing the elevator and containing settable parameters. The elevator car installed in the elevator shaft is allowed to enter a motional condition produced by the balance difference between the elevator masses; using two different loads connected to the terminals of the synchronous motor, the rotational speed, electromotive force and synchronous reactance of the synchronous motor are measured while the elevator car is in a constant motional condition, and the stator resistance is measured via a separate measurement; and a control model describing the elevator is computed and formed from these measurements.
Abstract:
The invention relates to an elevator system (1), which comprises control appliances (2, 3, 4, 5, 6, 7, 8, 9, 10) of the elevator system fitted to communicate between themselves. The elevator system comprises a control arrangement (11) for placing at least one control appliance into standby mode or for terminating the standby mode. The control arrangement is fitted to set the standby mode on the basis of at least one activation signal, as well as to send a control signal (21) of the standby mode to at least one control appliance of the elevator system. The invention also relates to a method for fitting a standby mode into an elevator system.
Abstract:
A drive device of an elevator includes a DC bus, a motor bridge connected to the DC bus for the electricity supply of the elevator motor, a control circuit with which control circuit the operation of the motor bridge is controlled by producing control pulses in control poles of high-side and low-side switches of the motor bridge, a brake controller, which comprises a switch for supplying electric power to an electromagnetic brake, a brake control circuit, with which the operation of the brake controller is controlled, an input circuit for the safety signal to be disconnected/connected from outside the drive device, drive prevention logic and brake drop-out logic connected to the input circuit and configured to prevent the passage of control pulses to the control poles of the high-side and/or low-side switches when the safety signal is disconnected.
Abstract:
A drive device of an elevator includes a DC bus, a motor bridge connected to the DC bus for the electricity supply of the elevator motor, a control circuit with which control circuit the operation of the motor bridge is controlled by producing control pulses in control poles of high-side and low-side switches of the motor bridge, a brake controller, which comprises a switch for supplying electric power to an electromagnetic brake, a brake control circuit, with which the operation of the brake controller is controlled, an input circuit for the safety signal to be disconnected/connected from outside the drive device, drive prevention logic and brake drop-out logic connected to the input circuit and configured to prevent the passage of control pulses to the control poles of the high-side and/or low-side switches when the safety signal is disconnected.