Abstract: A motor control device for controlling rotation of a brushless DC motor of a ceiling fan includes a receiver unit that receives an input signal and outputs a command signal, a magnetic sensor unit for detecting a magnetic pole variation of the brushless DC motor so as to generate a position signal, a processing unit that is electrically connected to the receiver unit and the magnetic sensor unit and that generates a control signal, a motor drive unit that is electrically connected to the processing unit and the brushless DC motor and that generates a drive signal for driving the brushless DC motor, an AC to DC converter unit that rectifies and filters a grid power to generate a first DC power for the motor drive unit, and a DC to DC converter unit that is electrically connected to the aforementioned units and that generates a second DC power.

Abstract: A voltage drive system is provided having a plurality of modulators and a plurality of cascaded switching circuits which collectively generate a single-phase output signal to a load. Each modulator receives a phase current error and has an adder which generates a modulated phase current error based on the phase current error and based on a signal having a phase. For each respective modulator, the phase of the respective signal is different. Each respective modulator changes a respective gate input when the respective modulated phase current error changes from being within a predetermined current range to being outside of the predetermined current range. Each respective switching circuit receives the respective gate input and generates a respective output terminal voltage based on the respective gate input. The change in the respective gate input effectively causes a switching event of the respective switching circuit.

Abstract: A fire extinguishment system may include a fire extinguishment apparatus joined to dry chemical, clean agent and water systems. The fire extinguishment apparatus may include dry chemical, clean agent and water nozzles joined to a housing. The dry chemical nozzle may be a multi-stage nozzle configured to discharge consolidated dry chemical with a substantial charge. The dry chemical nozzle may include chamber segments formed from aluminum, collars formed from stainless steel and positioned between the chamber segments, and a flow disruptor. At least some chamber segments may include rifled surfaces. The dry chemical nozzle may be positioned within the water nozzle to allow water discharged from the water nozzle to at least partially encompass dry chemical discharged from the dry chemical nozzle or positioned offset from the water nozzle to allow for parallel discharge of water and dry chemical streams from the fire extinguishment apparatus.

Abstract: The system of the present invention uses a gps receiver and a computer program product to disable a feature of an electronic device when movement of the receiver is detected. Speed data from a gps data stream is monitored. When the speed of the gps receiver exceeds a predetermined value, the desired feature of the electronic device is disabled. For example, when the speed of the gps receiver exceeds 0.5 knots, a windows function call is executed to set a desired display element as a top window on a display screen. The system may allow for temporary enabling of disabled features and for rapid enabling of disabled features when motion stops. The system may also include navigational software. A manufacturer may also use a proprietary combination of one or more disabled data fields in a gps data stream to identify gps receivers approved for use with the system.

Abstract: A four pole, three-phase, NPC converter that produces virtually no common mode voltage. The low common mode voltage output is achieved by constraining the switch states of the NPC converter. A fourth pole and associated control balance the upper and lower DC link voltages. The converter may be an inverter or a rectifier.

Abstract: A medium voltage power converter is provided that has an input transformer adapted to connect to a multi-phase power source, multiple low voltage drives each coupled to a respective set of secondary windings of the input transformer and operatively configured to provide a corresponding set of three-phase power outputs, and an output transformer. The output transformer has multiple input primary winding circuits each operatively coupled to the three-phase power outputs of a respective one of the drives, a plurality of output secondary winding circuits each disposed in relation to a respective input primary winding circuit, and a secondary winding connection arrangement in which each output secondary winding circuit has three secondary windings each of which is connected in series or in parallel with each other secondary winding of each other output secondary winding circuit to form a respective one of three phase-shifted outputs of the secondary winding connection arrangement.

Abstract: A step voltage controlling device and method for High Intensity Discharge (HID) light dimming applications includes an autotransformer, voltage sensing block, current sensing block, pulse forming block, microprocessor control unit (MCU) block and plural three switch blocks which allows an instantaneous variation of the voltage applied to the load which is controlled to be synchronized with the load current zero crossing point.

Abstract: A step voltage controlling device and method for High Intensity Discharge (HID) light dimming applications includes an autotransformer, voltage sensing block, current sensing block, pulse forming block, microprocessor control unit (MCU) block and plural three switch blocks which allows an instantaneous variation of the voltage applied to the load which is controlled to be synchronized with the load current zero crossing point.

Abstract: An electromagnetic machine is provided. The machine includes a stator extending along a longitudinal axis and having an inner surface defining a rotor receipt cavity. The rotor extends along and is rotatable about the longitudinal axis within the rotor receipt cavity. A plurality of ring assemblies are supported on the rotor and a plurality of magnets are circumferentially spaced about the rotor and extend through the ring assembly. Each magnet is generally parallel to the axis of the rotor.

Abstract: Embodiments of the present invention are directed to a method and system for disabling distracting features of electronic devices in a moving vehicle in order to enhance vehicle operator safety. A safety controller system may be operatively connected with a motion monitor within a vehicle and with a computing device in communication with the motion monitor. The safety controller system may include a motion monitor communication component for continuously receiving data from the motion monitor, which may be a GPS system installed within the vehicle. The safety controller system may additionally include a feature disabling module for disabling a feature of the electronic device based on detected motion conditions determined from the received data and a feature enabling module for enabling the feature of the electronic device based on a detected lack of motion determined from the received data.

Abstract: A keypad-based security system limits access to the ignition of a gas powered vehicle such as a golf or utility cart, to authorized operators having authorized ID codes. The security system, which is easily retrofit to existing vehicles, is interposed between the vehicle's ignition switch and the switch circuit of the vehicle. ID codes input by the operator using an on-board keypad are compared with a set of authorized ID codes stored in a memory, and a relay is energized to connect the ignition switch to the switch circuit with the energy source when the input ID code is verified as matching one of the authorized ID codes stored in the memory. The keypad uses only five keys to input a four digit ID code comprising any of the digits from 0 to 9.

Abstract: The system of the present invention uses a gps receiver and a computer program product to disable a feature of an electronic device when movement of the receiver is detected. Speed data from a gps data stream is monitored. When the speed of the gps receiver exceeds a predetermined value, the desired feature of the electronic device is disabled. For example, when the speed of the gps receiver exceeds 0.5 knots, a windows function call is executed to set a desired display element as a top window on a display screen. The system may allow for temporary enabling of disabled features and for rapid enabling of disabled features when motion stops. The system may also include navigational software. A manufacturer may also use a proprietary combination of one or more disabled data fields in a gps data stream to identify gps receivers approved for use with the system.

Abstract: Systems and methodologies are provided that adapt and control desired fabrication processes by utilizing a control model based solution. A suitable control model is obtained or derived from one or more other control models. A formulaic description is then obtained that predicts one or more desired outputs based on various process settings and inputs. A suitable solution to the description that achieves the desired outputs and is relatively close to ideal processing conditions is obtained utilizing a heuristic. The solution includes process control parameters or settings that are employed to control and/or modify a fabrication process.

Abstract: An electromagnetic machine is provided. The machine includes a stator extending along a longitudinal axis and having an inner surface defining a rotor receipt cavity. The rotor extends along and is rotatable about the longitudinal axis within the rotor receipt cavity. A plurality of ring assemblies are supported on the rotor and a plurality of magnets are circumferentially spaced about the rotor and extend through the ring assembly. Each magnet is generally parallel to the axis of the rotor.

Abstract: An electromagnetic machine is provided. The machine includes a stator extending along a longitudinal axis and having an inner surface defining a rotor receipt cavity. The rotor extends along and is rotatable about the longitudinal axis within the rotor receipt cavity. A plurality of ring assemblies are supported on the rotor and a plurality of magnets are circumferentially spaced about the rotor and extend through the ring assembly. Each magnet is generally parallel to the axis of the rotor.

Abstract: A system and method of harmonic regulation includes a harmonic regulator configured to cancel or inject harmonics into a power conversion system. A resettable integrator is provided to determine at least one harmonic coefficient of the at least one error signal harmonic. The resettable integrator determines the at least one harmonic coefficient over a single signal period and is then reset. The harmonic regulator further includes at least one adder to determine a difference of the harmonic coefficient and the reference harmonic coefficient and a regulator is provided to determine an at least one axis harmonic reference signal. The harmonic regulator outputs a three-phase final electrical reference signal that is input into a DC/AC inverter of a power conversion system.