217883 ⎘
Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
Sub-classes:Transformer arrangement
#2Transformer converter with center tap inductance
#3PORTABLE VOLTAGE CONVERTER
#4Power conversion device
#5Voltage source converter (VSC) control system with active damping
#6Active triac triggering circuit
#7System and method of implementing an electronic brushless variable transformer for providing a variable AC output
#8Electronic system sharing power of doorbell, power supply device thereof, and power supply method thereof
#9Energy saving high frequency series buck AC voltage regulator system
#10Power supply apparatus and image forming apparatus
#11Sampling for dimmer edge detection in power converter
#12LED driver with high dimming compatibility without the use of bleeders
#13Variable feedback signal based on conduction time
#14Tap switch
#15Active triac triggering circuit
#16Electronic sine wave transformer
#17Power-conversion engine
#18Electrical circuit, in particular used for generating electrical power
#19Input voltage sensing for a switching power converter and a triac-based dimmer
#20Transformer-isolated LED lighting circuit with secondary-side dimming control
#21Dimmer system and damper circuit thereof
#22METHOD AND SYSTEM FOR SUPPLYING MULTIPLE LED DRIVERS USING THE SAME TRAIC DIMMER
#23Vacuum heating device and vacuum heat treatment method
#24Power supply for a load control device
#25Phase-fired control arrangement and method
#26PARALLEL AC SWITCHING WITH SEQUENTIAL CONTROL
#27Electrical circuit, in particular used for generating electrical power
#28Multiphase electric circuit for shutting down a current conducted over respectively one AC power controller
#29TRANSFORMATION CIRCUIT AND ELECTRONIC DEVICE USING SAME
#30AC VOLTAGE REGULATION SYSTEM AND METHOD
#31Power supply for a load control device
#32Electronic power-saving device
#33Power supply for a load control
#34Sag-Swell and Outage Generator for Performance Test of Custom Power Devices
#35Bi-polar bi-directional energy balancing power-conversion engine
#36Method and apparatus for using power-line phase-cut signaling to change energy usage
#37Apparatus and method for controlling power of fixing unit
#38Apparatus for power control by phase gating and a method for harmonic reduction
#39Step sinusoidal voltage controlling method for hid, flourescent and incandescent light dimming applications
#40Control circuit of rotational speed of a fan
#41Power supply for a load control device
#42Circuit for use with switched leg power supply
#43Method for improving the operation of a matrix converter
#44Apparatus for controlling the power of an AC voltage supplying an electrical consumer by phase control and method for reducing harmonics
#45Multiphase reduced voltage starter with bypass relays, interphase electrical isolation and shared thermal mass