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| Number | Title | Issue Date |
| 8177032 | Elevator having regenerative voltage control A car is suspended by suspension means and raised and lowered by a hoisting machine. Electric power supplied to a motor of the hoisting machine is controlled by an electric power converter. The electric power converter is controlled by a control apparatus. The contr... | 05/15/2012 |
| 8177033 | Transportation system with capacitive energy storage and non-volatile memory for storing the operational state of the transportation system upon detection of the operational anomaly in power A transportation system and a method are provided for backing up the operational state of a transportation system. The transportation system includes a control apparatus for controlling the operation of the transportation system. The control apparatus further includ... | 05/15/2012 |
| 8146714 | Elevator system including regenerative drive and rescue operation circuit for normal and power failure conditions A system continuously drives an elevator hoist motor during normal and power failure conditions. A regenerative drive delivers power from a main power supply to the hoist motor during normal operation. A rescue operation circuit includes a backup power supply and is... | 04/03/2012 |
| 8127894 | Elevator motor drive tolerant of an irregular power source A hoist motor (12) for an elevator (14) is continuously driven from an irregular power supply (16). A regenerative drive (10) delivers power between the power supply (16) and the hoist motor (12). A controller (11) me... | 03/06/2012 |
| 8104584 | Elevator drive control strategy An elevator drive assembly (30) includes a voltage regulator (40) that selectively introduces current under certain conditions. In one example, the voltage regulator (40) introduces a negative flux current to an electric motor (32) when t... | 01/31/2012 |
| 8083033 | Elevator system with control to allocate a call based on charging status of energy storage, and method of controlling an elevator group An elevator system and a method are provided for controlling an elevator group. The elevator system includes an elevator group, which includes at least two elevator cars, which elevator cars are fitted to be moved in the elevator hoistway according to the calls allo... | 12/27/2011 |
| 7942246 | Controlling an elevator with a standby mode An elevator system where control appliances of the elevator system are fitted to communicate between themselves is described herein. The elevator system has a control arrangement for placing at least one control appliance into standby mode or for terminating the sta... | 05/17/2011 |
| 7896137 | Elevator power system having plural storage apparatuses A power supplying system for an elevator includes: a first electric storage apparatus for storing thereinto electric power derived from a commercial power supply; a charging apparatus for charging the electric power derived from the commercial power supply to the fi... | 03/01/2011 |
| 7775328 | Operation device for an elevator system An operation device for an elevator system includes terminals connectable to a 3-phase AC power source providing a respective AC power supply voltage and a drive device connected to the terminals for driving a motor of the elevator system. A transformer is connected... | 08/17/2010 |
| 7681694 | Energy storage system for elevators An elevator system and a method for reducing total power in an elevator system are provided. The elevator system includes at least one elevator without counterweight for moving people and/or goods. The elevator without counterweight comprises a power converter unit,... | 03/23/2010 |
| 7650968 | Elevator rescue operation control system including selective transformer winding energization A power supply for an elevator drive includes a voltage input, a comparator for comparing the input voltage with a predetermined threshold, a transformer having a primary winding and a secondary winding connected to the elevator drive. The transformer has a single t... | 01/26/2010 |
| 7540355 | Self-operable reserve power system for an elevator system A power control system is operable for controlling and balancing the generation and/or consumption of electrical power through an internal electricity distribution network connected with at least one electrically driven elevator system. The elevator system is connec... | 06/02/2009 |
| 7506726 | Counter weighted safety device for an elevator A safety device for an elevator includes a cabin, a counterweight, a cabin drive motor with a rotor, and at least one power-failure electromechanical brake. The safety device has a control device arranged to receive at least one information allowing emergency power ... | 03/24/2009 |
| 7464793 | Operating unit of elevator at the time of power interruption An emergency power operation apparatus of an elevator that operate machines in a firefighter operation according to the situation in a case where a power failure occurs during firefighter operations during a fire and a switchover to an emergency power source occurs.... | 12/16/2008 |
| 7367430 | Elevator system A wedge-ribbed belt supports an elevator car in a cantilevered mode and engages a drive pulley of a drive mounted at the head of an elevator shaft. The belt has a running surface facing the drive pulley with a plurality of ribs and grooves extending in parallel in a... | 05/06/2008 |
| 7368889 | Motor control apparatus and control method thereof A motor control apparatus supplying AC power to a motor having a plurality of motor windings having an inverting part including a bridge circuit having a plurality of switching units, and supplying the AC power to the motor; brake relays short circuiting the motor w... | 05/06/2008 |
| 7334665 | Interlock wiring communication system for elevators The systems and methods of present invention invoke an elevator communication system for providing communication between a plurality of hall fixture devices and at least one elevator system controller. The elevator communication system includes at least one elevator... | 02/26/2008 |
| 7331426 | Elevator system using a supercapacitor as a backup power source An elevator system uses a supercapacitor to store electric energy. Furthermore, the supercapacitor can be used as a source of reserve power in emergency situations, such as power failures. The supercapacitor is connected together with three switching branches to a r... | 02/19/2008 |
| 7327134 | Method and system for transformer control A method to balance transformer flux among a plurality of transformers is disclosed. The plurality of transformers is connected to a plurality of converters, each transformer having an associated converter. The method comprises determining a reference flux value, me... | 02/05/2008 |
| 7316297 | Elevator escape device Provided is an elevator escape device. In response to a stop of the elevator due to power outage, a trapped person may press a switch to activate a backup generator, and either a backup electromagnetic contact is enabled if the backup generator functions normally or... | 01/08/2008 |
| 7275622 | Traction elevator back-up power system with inverter timing A back-up power system for a traction elevator includes a power sensing device to sense a power loss or irregularity of the normal control power. An inverter timing system is connected to the power loss sensing device. The inverter timing system receives a power sen... | 10/02/2007 |
| 7268514 | Motor control for stopping a load and detecting mechanical brake slippage A method and apparatus for stopping an AC motor that is controlling a load while detecting mechanical brake slippage of a mechanical brake for holding the load against movement includes a controller for decreasing torque-producing current commands from the drive whi... | 09/11/2007 |
| 7264087 | Control of a counterweightless elevator using total mass of the elevator Method and system of controlling a counterweightless elevator system provided with an elevator car and a variable speed drive with an electric motor. The elevator car load is weighed, and the elevator system is controlled in order to reduce the physical/electrical d... | 09/04/2007 |
| 7246686 | Power supply for elevator systems having variable speed drives An improved system of variable speed drives that enhances the energy efficiency of an elevator system by enabling power transfer between the variable speed drives of two or more elevators via a common DC bus. Any combination of regenerative and non-regenerative vari... | 07/24/2007 |
| 7228942 | Method for energy storage for DC motor powered load hoisting machinery A method for energy storage and recovery for load hoisting equipment driven by a diode controlled DC motor and having an inverter controlling an induction motor which drives a flywheel whereby, utilizing rest power such as reverse power from the DC motor when loweri... | 06/12/2007 |
| 7227323 | Motor driving apparatus A motor driving apparatus applicable to various types of motor driving apparatuses and having a power storage section for storing a regenerative current and supplying power to an inverter section at the time of acceleration. The motor driving apparatus further compr... | 06/05/2007 |
| 7218490 | Process and device for determining a run-away condition of a rotation-speed controlled, permanent-excited synchronous motor A process and device for determining a run-away condition of a rotation-speed controlled, permanent-excited synchronous motor are described. The process continuously checks, when a rotation speed controller is active and for a predetermined constant rotation speed s... | 05/15/2007 |
| 7197958 | Energy storage flywheel retention system and method An energy storage flywheel system includes a flywheel assembly that is rotationally mounted in a housing assembly, and one or more actuator assemblies. The actuator assemblies are configured to selectively engage and disengage the flywheel assembly. When the actuato... | 04/03/2007 |
| 7176648 | Energy management apparatus and method for injection molding systems An energy management control apparatus for a molding machine that includes a first electrically-driven prime mover configured to drive at least a first molding machine device, and a second electrically-driven prime mover configured to drive at least a second molding... | 02/13/2007 |
| 7170246 | Motor control apparatus A motor control apparatus supplying braking power to brake a motor comprises a braking power providing unit to receive input power having an input power voltage lower than a braking power voltage and to boost the input power voltage up to the braking power voltage t... | 01/30/2007 |
| 7166977 | Indurstrial robot controlling device Since a release voltage to a brake is applied by a plurality of series-connected contacts and at least one contact is a normally open contact of a relay for controlling a driving power supply of a motor, a control apparatus having a high safety characteristic for an... | 01/23/2007 |
| 7165654 | Energy storage method for load hoisting machinery A method for energy storage and recovery for load hoisting equipment powered by an induction hoist motor controlled by a first inverter and having a dual inverter controlling a capacitor utilizing rest power such as reverse power generated from the motor when loweri... | 01/23/2007 |
| 7158393 | Power conversion and voltage sag correction with regenerative loads In dynamic voltage sag correctors and other power conversion equipment having a DC bus that is subject to over-voltage conditions due to power being fed back by a regenerative load, a bus discharge switching device and a discharge resistor are connected in series ac... | 01/02/2007 |
| 7148652 | Method and apparatus for determining and handling brake failures in open loop variable frequency drive motors A controller for a variable frequency drive monitors electrical power from a variable frequency drive motor while a brake is maintaining a load driven or moved by the motor without requiring additional feedback components of a closed loop configuration. If excess el... | 12/12/2006 |
| 7135835 | Converter apparatus, inverter apparatus, and DC link voltage control method The invention is directed to the provision of a converter apparatus, an inverter apparatus, and a DC link voltage control method, wherein the upper limit value of the DC link voltage that rises due to regenerative energy occurring from a motor is set high, thereby i... | 11/14/2006 |
| 7133602 | Power supply apparatus, motor drive control method using the same and motor vehicle having the same mounted thereon A power supply apparatus driving and controlling motor generators (MG1, MG2) includes a battery (10) generating an input voltage (Vb), a converter (110) converting the input voltage into a motor operating voltage (Vm) according to a volta... | 11/07/2006 |
| 7122988 | Rotation drive device and rotation drive method This rotation driving apparatus includes a torque generating circuit 72 for generating a torque of a servo motor 30 with voltage supply from a power source 71 and a motor control circuit 73 for controlling rotation of the motor. In the to... | 10/17/2006 |
| 7117979 | Method for preventing an inadmissibly high speed of the load receiving means of an elevator A method for preventing an inadmissibly high speed of a load receiving unit of an elevator, including the steps of supplying information about an actual position and an actual speed of the load receiving unit in an area of an entire travel way of the load receiving ... | 10/10/2006 |
| 7106023 | Motor driving apparatus The present invention is directed to the provision of a servomotor driving apparatus that feeds energy stored in a power storage part connected with a DC link that connects a rectifier circuit with an inverter circuit so that the energy stored in the power storage p... | 09/12/2006 |
| 7104363 | Power transmission system for elevator An elevator having a power feeding apparatus effective for reducing the installation space for the elevator is disclosed. The dimension of the power transmission part disposed at the hoist way and the dimension of the power receiving part mounted on the count... | 09/12/2006 |
