KOLLMORGEN CORPORATION Patent applications |
Patent application number | Title | Published |
20140265971 | Battery Charger/Export Power - A system for providing operating or charging current supply in different modes of operation includes an electric machine including a rotor and a stator having stator windings, at least one charge storage device, such as a battery, and an inverter disposed between the charge storage device terminals and the electric machine. A contact arrangement modifies electrical interconnections between phases of the inverter and the stator windings. In a supply mode, the electrical interconnections are controlled so that each inverter phase is electrically interconnected with a stator winding set having windings separated from each other by stator windings in other winding sets for driving the rotor of the electrical machine. In a charge mode, however, these interconnections are controlled so that each inverter phase is electrically interconnected with a stator winding set having windings directly adjacent to each other and are not separated from each other. | 09-18-2014 |
20140239752 | Stepper Motor Rotor with Internal Damper - A rotor for an electric motor with improved oscillation settling characteristics has a shaft rotatable about a longitudinal axis, a rotor section, disposed on the shaft for rotation together with the shaft, and, in certain arrangements, a permanent magnet disposed adjacent to the rotor section for rotation together with the shaft. The rotor section defines a recess around the shaft, extending from an end of the rotor section axially toward the opposite end of the rotor section, or the permanent magnet, if it is provided, and at least one mass is secured to the rotor section within the recess by a layer of deformable damping material, such as a dielectric gel. The rotor is particularly appropriate for use in a hybrid stepper motor, a variable reluctance motor, or a permanent magnet brushless motor, and a process of assembling the rotor is also referred to. | 08-28-2014 |
20130313937 | Rotor Lamination Stress Relief - A multilayer laminated rotor is mountable on a shaft for rotation relative to a stator of a rotary electric machine arrangement. The rotor has a plurality of laminas, joined together, and voids for receiving magnets. An annular rotor section, which surrounds a shaft opening within which the shaft is receivable, extends between the shaft opening and a radially outer circumferential rotor surface. The annular section mentioned includes an undulating series of the voids in void groups extending from the radially outer circumferential rotor surface inwardly toward the shaft opening and then back toward the radially outer circumferential rotor surface, as well as a solid radially interior portion without any of the voids. Distal voids in the void groups include curved, arcuate, or recurved stress relieving features extending inwardly from radially innermost corner locations of the distal voids. | 11-28-2013 |
20130280078 | Wind Turbine Blade Pitch Redundant Safety Arrangement - A wind turbine includes a blade position adjustment system providing for continued wind turbine blade repositioning operation even after the occurrence of certain faults. The system includes a plurality of electrically operable motors, each of which is interconnected with one of the wind turbine blades to reposition that wind turbine blade and modify the blade pitch. Each motor includes two or more sets of electrically isolated windings, and a power supply is separately interconnected with each of the electrically isolated winding sets to provide for continued repositioning of each blade upon occurrence of a fault, such as voltage or current deterioration, in one of the winding sets. | 10-24-2013 |
20130249342 | Cantilevered Rotor Magnet Support - A multilayer laminated rotor mountable on a shaft for rotation relative to a stator of a rotary electric machine arrangement has a plurality of laminas joined together to form the rotor and voids for receiving magnets. The rotor has an annular section, extending between a shaft opening for receiving the shaft and a radially outer circumferential rotor surface, which includes an undulating series of the voids in void groups extending from the radially outer circumferential rotor surface inwardly toward the shaft opening and then back toward the radially outer circumferential rotor surface. A pair of distal voids in each void group, together with distal voids of adjacent void groups, define gaps separating adjacent arc sections of the radially outer circumferential rotor surface. Such an arrangement forces the structural support to be cantilevered, improving rotor integrity, and, due to a reduction in magnetic leakage pathways, provides improved electrical performance. | 09-26-2013 |
20130121346 | Systems and Methods for Supporting Two Different Protocols on a Same Physical Connection - Systems and methods of supporting communications over a common network connection in a master-slave field bus network with a first type of packet formatted with a time-sensitive protocol and a second type of packet formatted with a non-time-sensitive protocol are provided. The slave devices are configured with filters to prevent the first type of packet from reaching a configurator and the second type from reaching a master device. The slave devices are also configured with arbitration logic so that the packets formatted with the time-sensitive protocol are provided with a priority over the packets formatted with the non-time-sensitive protocol. | 05-16-2013 |
20130054724 | Safe Torque Off Over Network Wiring - Systems and methods for providing Safe Torque Off signals using communication wires used for control signaling. Single channel Safe Torque Off signals can be provided as a DC voltage or AC voltage across two sets of twisted pair wires. Alternatively, two Safe Torque Off signals can be provided using both a DC voltage and an AC voltage across the two sets of twisted pair wires. | 02-28-2013 |
20120267970 | Coolant Flow Channel Arrangement for a Fluid Cooled Electric Motor - An improved fluid cooling arrangement for an electric machine, such as an electric motor, a generator, or a motor/generator assembly, is provided. In its most general sense, the fluid-cooled electric machine includes a rotor disposed on a motor shaft, a stator surrounding the rotor, and a motor housing surrounding the stator, with the stator formed of a laminated stack of stator plates that is plated at its outer surface. | 10-25-2012 |
20120267967 | Environmentally Protected Housingless Generator/Motor - A stator arrangement particularly suitable for use in an air-cooled generator or other such electric machine includes a stator with an outer stator surface, an opening therein defining an inner stator surface, and longitudinally opposed stator end surfaces. Conductive coils are supported by the stator, and include end turns overlying the longitudinally opposed stator end surfaces. In order to block out environmental contaminants and prevent conductive coil shorting, protective barriers are mounted over the end turns and secured to the stator. | 10-25-2012 |
20120194030 | Force Balanced Multivoltage Winding Configuration - A stator arrangement for a balanced multiple voltage device operable as an electric motor, a generator, or a motor-generator includes a plurality of arc sectors configured so as to surround a rotor of the device. Each of the arc sectors includes a set of stator windings with at least one winding in each set. Those windings in pairs of the arc sectors located at diametrically opposed locations of the stator arrangement are concurrently energized and deenergized in order to eliminate load imbalance on the device. | 08-02-2012 |
20120175977 | Coolant Flow Enhancing Device For Stator Coil End Turns of Fluid Cooled Electric Motor - A coolant flow enhancing device is provided to increase electric machine coil cooling at coil end turn locations. Such a device is incorporated into an overall fluid cooled electric machine that has phase separators extending through slots between stator teeth. The device includes flow deflectors located at ends of the phase separators. Each of the flow deflectors is designed so that a contour of its interior surface follows an outer contour of a corresponding one of the end turns to both maximize a cooling fluid flow rate past the one of the end turns and minimize separation of the fluid from the one of the end turns. | 07-12-2012 |
20120074801 | Magnetic Rotor Having Inset Bridges To Promote Cooling - A rotor arrangement with decreased fluid flow impedance and improved rotary motor cooling is mountable on a shaft for rotation relative to the stator of a rotary motor arrangement The rotor arrangement has a plurality of laminations joined together to form a multilayer laminated rotor with a plurality of magnet receptacles. Each of the laminations has a solid central section surrounding an opening within which the shaft is receivable, spokes extending substantially radially outwardly from said solid central section, ribs interposed between adjacent spokes, and bridges interconnecting the spokes and ribs. At least some of the bridges are inset from an outer diameter of the lamination toward the solid central section to decrease fluid flow impedance and improve rotary motor cooling. | 03-29-2012 |
20110309711 | Separable Tooth Tip Armature Construction - In a process of producing a stator forming part of a rotary motor arrangement, a multiplicity of laminations are joined together to produce a first stack of laminations defining teeth, slots between adjacent teeth, and a yoke section connecting the teeth together. Coil elements are then mounted on the teeth so that the coil elements are disposed in the slots between the adjacent teeth, and a second stack of laminations is fitted onto an inner diameter of the first stack of laminations and fixed in place to function as tooth tips. At least part of the second lamination stack is then bored out or otherwise removed to dispose of all but a thin layer of the second stack of laminations bridging adjacent teeth defined by the first stack of laminations. A rotary motor stator produced by such a process is also described. | 12-22-2011 |
20100315025 | DYNAMIC BRAKING FOR ELECTRIC MOTORS - A system and method are provided for improved dynamic braking in AC motors with an electronic drive, and more particularly to using a current regulation circuit to control the current supplied to the motor to be in phase with the internal EMF voltage of the motor such that the braking torque of the current is maximized per ampere of dynamic braking current when needed to stop the motor in case of a control failure or emergency. A current regulator produces a voltage command to the motor based on the current command input. The motor is still controlled by a d-q current regulator and the q-axis (torque axis) voltage is driven to zero while the d-axis (non-torque axis) is left in current control with a zero current command. This way the motor internal voltage drives a current in the terminals of the motor but the current is in phase with the internal voltage of the motor. Since the current loops are still active, current limiting may be implemented and the dynamic brake current amplitude can be well controlled and entirely goes into stopping the motor. | 12-16-2010 |
20090280559 | GENETIC SEQUENCER INCORPORATING FLUORESCENCE MICROSCOPY - A fluorescence microscopy sequencer comprises a fluid transport subsystem in which reagents are pumped through a series of multi-port valves to a mixer or one or more flow cells, or directly into the flow cell(s). The one or more multi-port valves can be mounted upon a fluids manifold having syringe tubes mounted on the opposite side. Mounted on a movable support, the manifold may be brought into and out of fluid communication with a storage block comprising the plurality of reagents. In another embodiment, the sequencer comprises a beamsplitter indexer that facilitates the quick and reliable switching of filter cubes through use of a stepper motor. In yet another embodiment, a motion control system is provided in which an inertial reference is interposed between and directly coupled to a first and second axis of control, thereby minimizing any low structural resonant frequencies and enabling high performance (high frequency response) motion control. | 11-12-2009 |
20090058988 | System for Panoramic Image Processing - A system for low-latency, high-resolution, continuous motion panoramic video imaging includes a plurality of high-resolution video cameras, each video camera generating about at least 500 kilopixel near-real time video. The cameras can be supported for positioning the plurality of cameras at predetermined angular locations to generate a full 360 degree field of view. The system can also include an image processor for processing video image signals in parallel and providing panoramic images. In one embodiment, the system can include a display to provide seamless panoramic images. | 03-05-2009 |