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Magnetic rotation sensing
Embodiments for rotation sensing are provided. The device may include a magnet apparatus comprising a magnet, the magnet apparatus configured to be coupled to a...
Low mass driveshaft speed sensor assembly
A speed sensor assembly comprises: a driveshaft with a driveshaft axis, a sensing portion of the driveshaft having an axial bore along the driveshaft axis and...
Multi-output determination circuit
An embodiment of the present invention provides a multi-output determination circuit that determines whether or not any one input voltage of a plurality of...
Precision AC current measurement shunts
A more precise and cost effective means than previously commercially available for measuring alternating currents up to 100 amperes in the frequency range from...
Electric current locator
The disclosure herein provides an apparatus for location of a quantity of current vectors in an electrical device, where the current vector has a known...
Circuit for generating reference voltage of semiconductor memory apparatus
A reference voltage generating circuit in a semiconductor memory apparatus comprises a driving control signal generating unit configured to generate a driving...
Cascode current mirror circuit, bandgap circuit, reference voltage circuit
having the cascode current mirror...
A cascode current mirror circuit and a bandgap circuit are provided. The circuits are used together and function as a reference voltage circuit. The reference...
Converter control device for a bidirectional power supply system having
plural parallel phases
A converter device which is configured by connecting three converter circuits in parallel is provided between a secondary battery serving as a first power...
Method for controlling a direct current chopper controller
A method of controlling a direct current ("DC") chopper controller having a switch and a storage choke in which the choke has a current dependent on the...
Voltage conversion device capable of enhancing conversion efficiency
A voltage conversion device capable of enhancing conversion efficiency includes a charge pump for generating output voltage linear to input voltage according to...
The present invention provides a DC-DC converter including a first series circuit connected to both ends of a first switch and formed of a winding of a first...
Zero voltage switching
A method for providing non-resonant zero-voltage switching in a switching power converter. The switching power converter converts power from input power to...
Step-down switching regulator
An output monitoring comparator outputs an ON signal when an output voltage becomes lower than a reference voltage. A pulse modulator generates a pulse signal...
Power factor control systems and methods
A boost converter comprises an inductance that receives an input signal. A switch controls current supplied by the inductance to a load. A power factor control...
Power supply device for an electric circuit
In the case of a power supply device (2) for an electric circuit (3), an energy source (4) and an electric filter (7) are provided for the reliable and...
Double fed synchronous generator motor
A double fed synchronous generator motor which is coupled to a reversible pump-turbine and operated while switched to a power generating operation mode or a...
Sensor node voltage clamping circuit and method
A voltage clamping circuit includes a current source having a fixed current source and a variable current source and a variable resistor receiving current from...
Technique for conveying overload conditions from an AC adapter to a load
powered by the adapter
A constant voltage/constant power AC adapter converts AC voltage to DC voltage to provide power to a plurality of loads. The adapter's output characteristic is...
Auxiliary power adapter having device controls
An accessory for a portable electronic device, such as a digital music player, includes a set of device controls for controlling the portable electronic device....
Method and apparatus for charging an electric vehicle from a streetlight
Streetlights along streets and in parking lots are often suitably located for a vehicle to park in immediate proximity. An electric vehicle charging system and...
Integrated wireless resonant power charging and communication channel
A power delivery system wirelessly deliver electric power and a communication signal to a target device. The power delivery system includes a power transmitting...
Power transmission control device, power reception control device,
non-contact power transmission system, power...
A power reception device transmits authentication information (e.g., start code, manufacturer ID, product ID, rated power information, and resonance...
Method and apparatus for handling a charging state in a mobile electronic
In accordance with the teachings described herein, a method and apparatus for handling a charging state in a mobile electronic device is provided. A universal...
Multiple function current-sharing charging system and method
Multiple function current-sharing charging systems and methods are provided. Where first and second rechargeable power supplies are connected to a charging...
Vehicle electronic systems with battery management functions
An electronic system in a vehicle includes a motor, a charger, a battery pack, and a bus. The motor drives wheels and propellers of the vehicle. The charger...
Method for battery state-of-health monitoring using battery voltage during
A method is provided for determining a battery's state-of-health. An initial battery voltage is measured after a first voltage drop during an initiation of an...
System for electrically connecting and disconnecting a vehicle generator
from a vehicle storage unit
An energy recovery system for a vehicle uses an electric generator, such as an alternator, connected to the vehicle's engine or a wheel to recover kinetic...
Charging system, charging device and battery pack
A charging system is provided with a secondary battery, a charging current supplier for supplying a charging current to the secondary battery, an internal...
Solar-powered charger with heat-dissipating surface
A solar-powered charger includes a solar collector configured to generate electrical energy when exposed to light, a connector coupled to the solar collector to...
Stepping motor control circuit and analog electronic timepiece
The present invention aims to prevent a nonrotation state from being brought about even when a drive allowance is changed by variations in a stepping motor or...
Indicating instrument for vehicle
An indicating instrument for a vehicle includes a step motor including a field winding, a pointer, a stopper device for stopping the pointer, which is rotating...
Motor control apparatus and motor control method
A motor control apparatus and a motor control method determine whether the motor is in a back-pressure area so as to provide different rotation-speed control...
Methods and systems for automatic rotation direction determination of
electronically commutated motor
A method for determining a direction of rotation for an electronically commutated motor (ECM) is described. The motor is configured to rotate a blower and the...
Integrated fan drive system for cooling tower
An integrated fan drive system for a cooling tower comprising a high-torque, low speed permanent magnet motor having a rotatable shaft, a fan comprising a hub...
Motor drive device
The present motor control device detects from the speed of a motor and a current driving the motor that the motor is overloaded, and exerts control to set a...
Electric motor drive apparatus, hybrid vehicle with the same and stop
control method of electric power...
An ECU activates a shutdown permission signal and provides it to an AND gate when a shutdown signal is inactive. Thus, when an abnormality sensing device does...
Charged particle accelerators, radiation sources, systems, and methods
Man-portable radiation generation sources and systems that may be carried by hand to a site of interest by one or two people, are disclosed. Methods of use of...
Programmable radio frequency waveform generator for a synchrocyclotron
A synchrocyclotron comprises a resonant circuit that includes electrodes having a gap therebetween across the magnetic field. An oscillating voltage input,...
Control system for different colors of light emitting diodes
A control system includes a clock unit for providing a first clock signal, and a second clock signal having a frequency lower than that of the first clock...
Lighting system comprising interconnectable lighting modules
This invention relates to a lighting system. The lighting system includes a plurality of interconnectable polygonal lighting modules, wherein each lighting...
Lighting system and a method for controlling a lighting system
A method of controlling a lighting system includes a learning procedure. The lighting system includes lighting modules and a controlling device. The lighting...
Apparatus and method for driving backlight unit
The present invention is directed to a drive apparatus for a backlight unit (20) in which plural LED (Light Emitting Diode) elements are cascade-connected every...
Sensing type control circuit for electronic apparatus
A sensing type control circuit for an electronic apparatus is provided. An output unit is coupled between an external power source and the electronic apparatus...
Application infrastructure for constructing illumination equipments with
An application infrastructure for constructing illumination equipments with a transmission function includes at least one lamp reporting device for reporting a...
Circuits and methods for controlling dimming of a light source
A controller for controlling dimming of a light source includes a detection pin, an input signal pin, and a monitoring pin. The detection pin is operable for...
Control system for multiple fluorescent lamps
The present invention is directed to an apparatus that drives a lighting system with multiple lamps. A phase shift mechanism is produced either by a digital...
Brightness-adjustable illumination driving system
An illumination driving system includes a control unit and at least one base. The control unit includes a first converter and a brightness-adjustable circuit....
Drive circuit for driving a load with constant current
A drive circuit (1) for driving a load (3) comprises: a switched mode power supply (10) for supplying at the output (2a, 2b) a switched output current (IL); a...
Method and firmware for controlling voltage and current in a fluorescent
A method and firmware for controlling voltage and current in an electrical load includes steps of calculating a numerically quantized duty cycle of a...
Method and firmware for controlling an inverter voltage by drive signal
A method and firmware for controlling an inverter voltage includes steps of receiving as input a digitized feedback signal representative of an inverter voltage...