Matches 1 - 33 out of 33


Match Document Document Title
US20120000730 ELEVATOR REGENERATIVE DRIVE INCLUDING AN AIR CORE INDUCTOR  
An exemplary elevator machine includes a motor that operates in a first mode to move an elevator car and in a second mode to generate power. A line reactor is associated with the motor for...
US20090014250 ELEVATOR  
Disclosed herein is an elevator which has an improved structure such that a balance weight offsets the weight of a cage, passengers, and cargo to the utmost, according to changes in weight of the...
US20090211853 BATTERY POWERED MECHANIZED RAISE CLIMBING SYSTEM  
A battery powered raise climber system is provided that uses Lithium ion batteries to drive a single or double electric drive for an existing raise climber. The batteries offer a faster, safer,...
US20110036668 ELECTRONIC SAFETY SYSTEM FOR AN ELEVATOR  
Electronic safety system for an elevator with a controller (1) which is coupled to a motor (21) for driving an elevator car (2), comprising a safety controller (10) and a bus (3) by means of which...
US20090218175 Elevator Power System  
A power system (10) operates a plurality of hoist motors (18a, 18b, 18c), each of which controls movement of one of a plurality of elevators (12a, 12b, 12c). The power system (10) includes a power...
US20080128213 COMBINATION ELECTRICAL AND BATTERY-POWERED CONTROL SYSTEM FOR STAIRWAY CHAIRLIFT  
The present invention is directed to a stairway chairlift system that includes a rail assembly mounted adjacent a wall along a stairway and further includes a motorized chair unit movable along...
US20120285774 ELECTRICAL POWER SYSTEM  
The invention relates to an electrical power system for operating elevators. The electrical power system comprises: an electricity distribution network of a building, which comprises an interface...
US20090120728 Elevator Motor Brake Torque Measurement Device  
An elevator machine (20) assembly useful in an elevator system (10) includes a motor frame (26) that supports a motor (24) for selectively rotating a motor shaft (28). A brake (36) selectively...
US20150210506 Safety arrangement, elevator system, frequency converter and a method for monitoring electrical safety in an elevator system  
A safety arrangement of an elevator and a method for monitoring electrical safety in an elevator system is disclosed. The safety arrangement of an elevator includes a motor drive of the elevator,...
US20120067673 Transport System  
A power supply system of a transport system includes: a direct-current intermediate circuit; a motor bridge connected to the direct-current intermediate circuit, for supplying power between the...
US20150053508 SAFETY ARRANGEMENT OF AN ELEVATOR  
A safety arrangement of an elevator, which includes sensors configured to indicate functions that are critical from the viewpoint of the safety of the elevator, and also a safety circuit, with...
US20120193172 CONVEYOR SYSTEM COMPRISING AN ELECTROMAGNETIC BRAKE  
The invention relates to a conveyor system comprising a transport device (1) that can be moved along a substantially vertical path of travel and a linear motor comprising a primary part (2),...
US20100116595 MANAGEMENT OF POWER SOURCE VARIATIONS IN AN ELEVATOR DRIVE SYSTEM  
A device (22) manages power source variations in an elevator system. The device includes a transformer (60) having a primary (62) and a secondary (64). An input of the elevator system is connected...
US20130025974 Braking Device  
A braking device for an elevator is disclosed. The device may include a motor, a braking system, a first switch, and a second switch. The motor may be capable of generating a counter-electromotive...
US20130112507 ELEVATOR REGENERATIVE DRIVE CONTROL REFERENCED TO DC BUS  
An exemplary elevator drive includes a DC bus. At least some power components in a power section are electrically referenced to the DC bus. At least some control components in a control section...
US20120279806 OBSTRUCTION MONITORING METHOD AND SYSTEM FOR A VERTICAL RECIPROCATING CONVEYOR  
A method and system for controlling the operation of a drive motor for a vertical reciprocating conveyor. The method initially activates a drive motor to move a carriage from a resting position....
US20110290591 METHOD FOR RELEASING A LOAD-CARRYING APPARATUS OR A COMPENSATING WEIGHT OF AN ELEVATOR FROM A STOPPING POSITION  
An elevator load receiving apparatus or a compensating weight connected thereto by a suspension device is released from a safety device in a stopping position after downward travel, the load...
US20130192932 ELEVATOR SAFETY SYSTEM AND METHOD  
An elevator safety system including a controller, and a hoistway safety node arranged at a pit portion of an elevator hoistway. The hoistway node is operatively connected to one of a pit safety...
US20100078267 ELEVATOR  
A car is suspended by suspension means and raised and lowered by means of a hoisting machine. Electric power supplied to a motor of the hoisting machine is controlled by an electric power...
US20170057779 ELECTROMAGNETIC PROPULSION SYSTEM HAVING A WIRELESS POWER TRANSFER SYSTEM  
An electromagnetic propulsion system includes a plurality of primary windings and a permanent magnet arranged to move with respect to the plurality of primary windings. A secondary winding of the...
US20170029241 SYSTEM AND METHOD FOR LIMITING OVER-VOLTAGE IN POWER SUPPLY SYSTEM  
A system and method for providing a protective extra low voltage power supply in an elevator system (2) is disclosed. The power supply system (10) may include a switch mode power supply (12)...
US20170015526 SYSTEMS AND METHODS FOR DETERMINING FIELD ORIENTATION OF MAGNETIC COMPONENTS IN A ROPELESS ELEVATOR SYSTEM  
A ropeless elevator system, a propulsion system, and a method for operating a ropeless propulsion system are disclosed. The ropeless elevator system may include an elevator car, a hoistway in...
US20170005562 BUS CAPACITOR BANK CONFIGURATION FOR A MULTI-LEVEL REGENERATIVE DRIVE  
A regenerative drive device and a method for configuring the DC link of a regenerative drive device are disclosed. The multilevel regenerative drive device may include an inverter having a...
US20170001833 SAFETY CIRCUIT FOR AN ELEVATOR SYSTEM  
A safety circuit for an elevator system includes a first circuit having a plurality of switching contacts and a second circuit having a plurality of switching contacts. The switching contacts of...
US20160311645 CONTROL STRATEGIES FOR MULTILEVEL LINE REGENERATIVE DRIVE  
A control system (48) having a motor (28) is disclosed. The control system (48) may include a converter (32) operatively connected to a power source (36), an inverter (34) operatively connected to...
US20160311644 PWM STRATEGY FOR REGENERATIVE MULTILEVEL DRIVE  
A method (70) for controlling a multilevel regenerative drive (30) having a converter (32) and an inverter (34) is disclosed. The method (70) may include applying at least one of unipolar...
US20160280507 ELEVATOR RESCUE SYSTEM  
The invention refers to an elevator rescue system (10) for moving an elevator car of an elevator in an emergency situation, which elevator includes an elevator motor acting on hoisting ropes by...
US20160194179 ELEVATOR BRAKING IN A BATTERY POWERED ELEVATOR SYSTEM  
An elevator system includes a battery; a machine having a motor to impart motion to an elevator car; an inverter having a plurality of switches to convert DC power from the battery to AC power for...
US20160167921 METHOD FOR PERFORMING AN EMERGENCY STOP, AND A SAFETY ARRANGEMENT OF AN ELEVATOR  
A method for performing an emergency stop with an elevator and a safety arrangement of an elevator are disclosed. In the method, when an emergency stop criterion is fulfilled, the elevator car is...
US20160145075 ELEVATOR INSTALLATION AND A METHOD FOR CONTROLLING ELEVATORS  
The invention relates to an elevator installation and also to a method for controlling elevators. In the method a run plan is formed for driving elevator cars on the basis of service requests, the...
US20160079904 DRIVE UNIT EMPLOYING GALLIUM NITRIDE SWITCHES  
A switching assembly for use in a drive unit for driving a motor. The switching assembly includes a gallium nitride switch having a gate terminal, drain terminal and source terminal; a gate driver...
US20160039633 LOW PROFILE DRIVE UNIT FOR ELEVATOR SYSTEM  
A drive unit for an elevator system, the drive unit including a multilayer, power circuit board; a first DC link formed in a layer of the power circuit board; a second DC link formed in a layer of...
US20160002005 ELEVATOR SAFETY CIRCUIT  
An elevator safety circuit includes a plurality of relays; safety logic for monitoring status of the plurality of relays, the safety logic generating an output signal in response to the status of...

Matches 1 - 33 out of 33