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Pneumatic Shoe Lacing Apparatus

This invention provides a pneumatic shoe lacing apparatus for the pneumatic lacing of shoe.

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Class 322/32 - Frequency responsive devices or networks

Subclass of Class 322 - Electricity: single generator systems
Definition: Subject matter wherein a frequency responsive device or
No. of patents: 167
Last issue date: 10/23/2012

NumberTitleIssue Date
8294431Method of controlling a variable speed constant frequency generator
A method of controlling an engine-driven, electrical generator is provided. The generator generates an output voltage at a frequency with the engine running at an operating speed. The method includes the steps of connecting the generator to a load and varying the op...
7501798Method for the active damping of the drive train in a wind energy plant
A method for the active damping of a drive train in wind energy plant, with the following steps: the actual value of the generator rotational speed is acquired and amplified via an oscillatory delay element, the oscillatory delay element has a predetermined natural ...
7362019Vehicle alternator
A vehicle alternator for generating electric power has a stator, a rotor, a rectifier, a regulator case, and a cooling fin part. A stator winding is wound on the stator. The rotor is placed on opposite faces to the stator. The rectifier rectifies an alternating curr...
7355295Variable speed wind turbine having an exciter machine and a power converter not connected to the grid
A variable speed wind turbine having a doubly fed induction generator (DFIG), includes an exciter machine mechanically coupled to the DFIG and a power converter placed between a rotor of the DFIG and the exciter machine. Thus, the power converter is not directly con...
7337526Method for manufacturing squirrel cage rotor
Ceramic adhesive is applied inside the slots of an electric machine squirrel cage rotor prior to casting or insertion of rotor conductors. This heat-resistant insulation provides superior electrical insulation that is also mechanically rugged, thus enabling casting ...
7329960System and method for propelling a large land-based vehicle using a dual function brushless dynamoelectric machine
A propulsion system for a relatively large land-based vehicle, such as a locomotive or off-highway vehicle, is provided. The system may include a brushless dynamoelectric machine made up of a main alternator having a main rotor and a main stator, and an auxiliary al...
7330016Induction generator power supply
A method for enhancing the operation of an electrical power supply includes selecting a prime mover having a chosen power rating. An induction motor having a first power rating at a rated speed and a second power rating at an overspeed is chosen. The overspeed may b...
7327123Controller for AC generator
A control system that can accommodate the wide variations in the output of a generator, such as a permanent magnet alternator, while providing an output with relatively uniform phase ripple. The control system includes a zero crossing detector and variable ramp gene...
7312537Methods and apparatus for supplying and/or absorbing reactive power
A wind turbine includes a rotor having a hub, at least one rotor blade coupled to the hub, and a rotor shaft coupled to said hub for rotation therewith. The wind turbine also includes an electrical generator coupled to the rotor shaft, and a generator-side frequency...
7312550Architecture for electric machine
In one aspect, an alternator is described which includes a current control apparatus including a stator winding and a control winding, wherein current control in the control winding regulates the stator winding. In another aspect, a gas turbine engine includes a mul...
7304400Power generating system and its control method
A power controller 5 calculates the induced voltage or rotor magnetic flux from the output voltage and the output current of a generator 3, estimates a shaft speed of the generator 3 from the phase of the induced voltage or the phase of the roto...
7288923Voltage-limited electric machine
An electric alternator having a rotor, stator and at least one winding in the stator adapted to conduct a current, the machine also having and first and second magnetic circuits around different portions of the winding which may be configured relative to one another...
7271500Electrical rotating machine control unit and power generation system
Because of the necessity of resolver for detecting a rotating position, which is very expensive, and noise suppression of the rotating position signal line on a doubly-fed machine, cost increase of the generator and reduced reliability due to possible failures are i...
7268513Motor/generator unit
A motor/generator unit in which a motor/generator and an invertor part are integrated and the wiring of a field circuit part for supplying current to a winding on a rotor is rationalized. In a motor/generator unit in which a motor/generator body part having a field ...
7230358Electrical resonance circuits for high efficiency direct current motors
7230345Method for exercising a stand-by electrical generator
A method is provided for exercising an engine-driven, electrical generator. The generator has a first operation mode wherein the generator generates a predetermined output voltage at a predetermined frequency with the engine running a predetermined operating speed a...
7227338Fixed frequency electrical generation system with induction coupler and use thereof in an aircraft
A fixed frequency electrical generation system includes an induction coupler. The system includes an electricity generator with no rings or brushes, and an induction speed regulator, mechanically coupled, so as to transform mechanical energy input from a shaft rotat...
7227271Method and apparatus for controlling an engine start system
An apparatus (80) controls a synchronous machine (20) used to start an engine (300) during an engine start operation. The apparatus comprises: an exciter current control unit (84) for controlling exciter current output to the synchronous ...
7224081Voltage control for wind generators
A wind turbine generator control system includes relatively fast regulation of voltage near the individual generators with relatively slower overall reactive power regulation at a substation or wind farm level. The setpoint of the relatively fast voltage regulator i...
7215099Method in frequency converter provided with voltage intermediate circuit, and frequency converter
A method in a frequency converter provided with a voltage intermediate circuit in connection with interference in a network (5) to be supplied and a frequency converter (2), which comprises a network converter part (4) and an inverter part (3...
7211989Method for acceleration of a shaft run, as well as an apparatus for carrying out the method
A method for acceleration of a shaft run that a turbine, in particular a gas turbine, a generator and an excitation machine connected to one another by a common shaft, includes accelerating the turbine is accelerated using acceleration apparatus during a starting pr...
7190085Wind turbine for producing electrical power and a method of operating the same
A wind turbine includes a turbine rotor with at least one blade and a generator with a rotor and a stator. The turbine rotor is mechanically coupled with the rotor of the generator. A diode rectifier is electrically coupled to the stator of the generator. A direct c...
7176658Controller for permanent magnet alternator
The invention is a control system that, among other things, controls a permanent magnet alternator and provides relatively accurate voltage regulation. The control system may include one or more of the following: (1) a rectification system to rectify and regulate th...
7176659Vehicle electrical power supply system for supplying power to a high power load
The present invention provides an electrical power supply system for an automotive vehicle with high reliability and small size in which an adequate power is supplied to both a high power load like a blower motor and a conventional load like a battery by using a con...
7170262Variable frequency power system and method of use
A variable frequency power system with a power source having a rotating output and a speed control to regulate rotational speed of the rotating output. A generator coupled to and driven by the rotating output of the power source, whereby the speed control of the pow...
7166928Voltage control for wind generators
7157885Inverter controlled generator set and method for controlling the same
A method for controlling an inverter controlled generator set which comprises a DC power source section having as a power source a generator driven by an engine and an inverter which converts an output of said DC power source section into an AC output, the method co...
7151359Variable reluctance generator
A variable reluctance generator has phase windings and a bias winding. By controlling the excitation produced by the bias winding, the speed of the machine or the DC link, a power converter using only diodes can supply power to a DC bus. A method of operating a vari...
7126313Architecture for electric machine
The invention includes an electric machine having a rotor, stator and at least one winding in the stator adapted to conduct a current, and a secondary winding, electrically isolated from the first winding and inductively coupled to the first winding, which may be us...
7119452Voltage control for wind generators
7116003Aircraft starter/generator electrical system with mixed power architecture
A starter/generator electrical system for gas turbine powered aircraft with mixed power architecture to combine advantages of each. The mixed power architecture may be selected from constant frequency (CF), adjustable variable frequency (AVF) and narrow range variab...
7109687Three-phase ac generator for vehicle
A neutral point diode having three connecting terminals electrically commonly connected to each other is used in a type for connecting each generating coil of a three-phase alternating current electric generator for a vehicle in a Y-shape connection. The coil termin...
7088027Rotating asynchronous converter and a generator device
The present invention relates to a rotating asynchronous converter and a generator device. The converter comprises a first stator connected to a first AC network with a first frequency f1, and a second stator connected to a second AC network with a second...
7084609Alternator controlled rectifier
A system and method for controlling the voltage output of an alternator is disclosed. The system includes an alternator having a rotor, which has a field winding, a stator having a plurality of phases, a rectifier bridge connected to the plurality of phases, at leas...
7078826Hybrid gas turbine engine starter-generator
7075272Control device for vehicle AC generator
In a control apparatus of a vehicle AC generator, a flip-flop for receiving a clock pulse with a constant period and a control pulse is used. The clock pulse sets the control period at the constant period, and decides an on timing of the power transistor in this con...
7064455Fixed frequency electrical generation system and corresponding control procedure
The invention relates to a fixed frequency electrical generation system that can be placed at the variable load engine output, which includes: an initial stage (30), which is a permanent magnet generator that provides energy...
7061211Gas turbine generating apparatus
A gas turbine generating apparatus according to the present invention comprises a gas turbine capable of a high-speed operation, a permanent-magnet-type generator driven at a high speed by the gas turbine, an inverter device (5) for converting alternating-cur...
7053590Power generating system including a high-frequency alternator, a rectifier module, and an auxiliary power supply
A power generating system includes a high-frequency alternator, a rectifier, a capacitor in each phase line extending between an output terminal of the alternator and the rectifier, and an auxiliary power supply, providing auxiliary power for use within the power ge...
7042108Backup power system
A backup power system is connected in parallel to a load which is powered via a power line connecting that load to a main power source, such as a utility. The backup system includes a generator/condenser unit that is coupled to a flywheel unit to maintain the flywhe...
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