A motor driving apparatus capable of drivingly controlling a plurality of inverter units (IV1-IV4) with a single motor driving command S from a motor control unit (1), to thereby control a large-capacity motor or the like. The motor control unit (1) sends out a single motor driving command (torque command) S. An intermediary unit (3) obtains motor driving commands SxA1 to SxA4 for the inverter units (IV1-IV4) by multiplying the motor driving command S by each of coefficients A1 to A4 set in advance. The inverter units (3) are fed with the motor driving commands SxA1 to SxA4 individually and drive a single motor (2). Since the motor (2) is driven by the total current supplied by the inverter units (IV1-IV4), the motor can generate a large torque. The motor control unit (1) only needs to generate a single motor driving command S, and hence only needs to operate a single processing part. Alternatively, the single motor (2) may be replaced by a plurality of motors, each associated with a respective one of the inverter units (IV1 to IV4). Also, the intermediary unit (3) may generate the individual motor driving commands in the form of parallel or serial data.

Motor driving apparatus

A system for group controlling a plurality of elevators in accordance with group control algorithm including a plurality of parameters. This system includes a means for searching an optimum set. An optimum set means an optimum combination among combinations of parameters to be given to the group control algorithm. A new set is generated by crossing-over or mutation. Superior sets are accumulated in a storage by utilizing the additional registration of excellent sets in a storage and the deletion poor sets therefrom. An optimum set is selected from these superior sets. Therefore, the searching of an optimum set can be done efficiently.

Elevator group control system

An elevator control device for controllably driving multiple traction units includes position sensors and current supplies. Each of the current supplies includes a position controller for generating a speed command for the corresponding traction unit based on input difference between a common position command for the traction units and a feedback signal derived from an output of the pertinent position sensor, a speed controller for generating a current command for the corresponding traction unit based on an input difference between the speed command generated by the position controller and a feedback signal obtained by differentiating the output of the pertinent position sensor, and a current controller for supplying an electric current to the corresponding traction unit based on the current command generated by the speed controller.

Elevator control device

An elevator group control apparatus includes a parameter calculating unit for determining a weighting factor for an item to be evaluated, which is calculated from a running distance estimated by an estimation arithmetic operation unit by taking into consideration a relation between a running distance of an elevator and a passenger average waiting time, and an evaluation arithmetic operation unit for calculating a total evaluated value from an item to be evaluated of a passenger waiting time, an item to be evaluated of the running distance, and the weighting factor determined by the parameter calculating unit. The elevator group control apparatus selects an elevator whose total evaluated value is the best from among the plurality of elevators, and assigns a hall call to the selected elevator.

Elevator group control apparatus

Power distribution is managed in an elevator system including an elevator hoist motor (12), a primary power supply (20), and- an energy storage system (32 ) A predicted usage pattern for the hoist motor is established based on past hoist motor power demand in the elevator system or in similar elevator systems in similar buildings A target storage state for the energy storage system is then set based on the predicted usage pattern Power exchanged between the hoist motor, the primary power supply, and the energy storage system is controlled to address power demand of the hoist motor and to maintain the storage state of the energy storage system at about the target storage state

Management of power from multiple sources based on elevator usage patterns

When there is a breakdown in either one of first and second power converters supplying electrical power to a multi-winding motor comprising a wind-up mechanism, a rescue operation can be safely and reliably carried out by using the remaining power converter. A wind-up mechanism comprises a two-winding motor having first and second windings, and, during normal operation, power is supplied to the first and second windings from first and second inverters respectively. When the first inverter has broken down due to excessive current, first and second contactors are switched off, and a third contactor comprising a short-circuiting unit is switched on. Consequently, both windings receive power from the second inverter, enabling the rescue operation to be carried out without causing vibrations.

PROBLEM TO BE SOLVED: To accomplish saving of the commercial power supply by using an electric storage device effectively in the elevator operating environment. SOLUTION: The invention includes an optimization control device 60 which changes dynamically the control parameters relating to the charge/discharge control of the electric storage device 30 through a specified optimizing computation process at certain time intervals on the basis of the information exhibiting the operating condition of an elevator 10 and the information exhibiting the condition of the electric storage device 30 in order to draw out the performance of the device 30 to the maximum in accordance with the operating condition of the elevator 10. Optimization of the control parameters by this optimization control device 60 allows accomplishing the energy saving of the commercial power supply 16 by using the electric storage device 30 effectively in the elevator operating environment. COPYRIGHT: (C)2006,JPO&NCIPI

Control device of hybrid drive type elevator

PROBLEM TO BE SOLVED: To provide an elevator control device for controlling to surely charge power of regenerative operation and effectively use the same for power running SOLUTION: This elevator control device is constructed by providing the general elevator control device consuming the generated power in the regenerative operation in a rheostatic chopper 18 with an electric double-layer capacitor 21 parallel-connected to a direct current capacitor 3 for smoothing the direct current ripple of a rectifying circuit 2 for rectifying alternating current of an alternating current power supply 1, having an electrostatic capacity larger than the direct current capacitor, and accumulating most of the regenerative power from the motor side; a voltage detecting circuit 22 for detecting the terminal voltage of the electric double-layer capacitor; and a drive control part 5 taking the voltage near the rated voltage of the electric double-layer capacitor as the operating voltage of the rheostatic chopper and controlling the operation of the rheostatic chopper when the terminal voltage detected in the voltage detecting circuit reaches the voltage near the rated voltage of the electric double-layer capacitor COPYRIGHT: (C)2005,JPO&NCIPI

Elevator control system

PROBLEM TO BE SOLVED: To suppress only the vibrations produced at a mechanical resonance point in a motor drive controller for elevators. SOLUTION: A waveform signal in a phase opposite to that of the vibrational components, produced when a motor 12 is driven is generated through a speed detector 13, a rotation angle converter 30, and a phase adjustment device 31, and a sine computing unit 33. This signal is superposed on a torque command outputted from a speed controller 15, and the vibration components are thereby canceled out. At this time, a gain K corresponding to the speed of the motor is set at a speed conversion gain control device 40. Using the gain K, the waveform signal of the sine-computing unit 33 is subjected to gain control, only within a predetermined speed range at a gain control device 35. Thus, only the vibrations at a mechanical resonance point, produced when the motor is accelerated to some degree, can be appropriately suppressed. COPYRIGHT: (C)2005,JPO&NCIPI

Motor drive controller for elevator

PROBLEM TO BE SOLVED: To save electric power through effective utilization of the regenerated energy by previously accumulating the electric power generated during the regenerative operation, i.e. regenerated energy. SOLUTION: A control device of an elevator is equipped with an electricity accumulator device 30, a voltage sensor 31 to sense the voltage value between DC bus bars, a charge/discharge control device 32 having a preset charging level and discharging level, emitting the first control signal when the voltage value sensed by the sensor 31 exceeds the charging level and emitting the second control signal when lowers below the discharging level, a DC/DC converter 33 to perform the charging operation of the accumulator device 30 on the basis of the first control signal emitted from the charge/discharge control device 32 and conduct the discharging operation of the accumulator device 30 on the basis of the second control signal. Thereby the power generated during the regenerative operation, i.e. regenerated energy, is accumulated in the accumulator device 30, and during the power running, the regenerated energy accumulated in the accumulator device 30 is discharged so as to establish saving the electric power. COPYRIGHT: (C)2007,JPO&INPIT

Kazuhiko Takasaki

Papers

Elevator control device

Control device of hybrid drive type elevator

Elevator control system

Motor drive controller for elevator

Control device of elevator