Abstract: A method for controlling an electronic device including a charging circuit is provided. The method includes receiving power wirelessly from a power transmitting device; rectifying the received power; based on a voltage of the rectified power being greater than or equal to an allowable voltage of the charging circuit, controlling to convert the rectified power through a converting circuit of the electronic device and to output the converted power to the charging circuit for charging a battery of the electronic device, wherein the allowable voltage relates to a maximum voltage or a preferable voltage to be applied to the charging circuit; and based on the voltage of the rectified power being less than the allowable voltage of the charging circuit, controlling to stop converting the rectified power and to output the rectified power to the charging circuit by connecting the rectifying circuit to the charging circuit.

Abstract: A method for controlling an electronic device including a charging circuit is provided. The method includes receiving power wirelessly from a power transmitting device; rectifying the received power; based on a voltage of the rectified power being greater than or equal to an allowable voltage of the charging circuit, controlling to convert the rectified power through a converting circuit of the electronic device and to output the converted power to the charging circuit for charging a battery of the electronic device, wherein the allowable voltage relates to a maximum voltage or a preferable voltage to be applied to the charging circuit; and based on the voltage of the rectified power being less than the allowable voltage of the charging circuit, controlling to stop converting the rectified power and to output the rectified power to the charging circuit by connecting the rectifying circuit to the charging circuit.

Abstract: Disclosed is a method for controlling a wireless power receiver including a charging unit. The method includes receiving wireless power, rectifying the received wireless power and outputting Direct Current (DC) wireless power, and determining whether the voltage of the rectified wireless power is greater than or equal to the allowable voltage of the charging unit.

Abstract: Direct current can be measured by passing a conductor carrying the current through the core of a toroidal transformer having a bias winding and a sensing winding. A pulse generator send pulses of magnetization current through the sensing winding so that the magnetization current produces a magnetic flux in the core which opposes a magnetic flux produced by the direct current carried by the conductor. A sensing circuit, connected to the sensing winding, detects the level of current through that winding to produce a measurement of the direct current carried by the conductor. A constant direct current is applied through the bias winding to increase the magnetic flux produced by the direct current carried by the conductor. Biasing the magnetic flux enables even small currents flowing through the conductor to be measured. Another version of the current sensor uses two transformers to measure direct current flowing in either direction in the conductor and provides an indication of that current's polarity.

Abstract: A laser device equipped with a high-voltage pulse generator wherein the pulse generator supplies an electric energy from a dc power source in an on-off form of a supply voltage to a tank circuit through a transformer, with the switching on and off of the supply voltage being effected in synchronism with the resonance period of the tank circuit. The tank circuit stores the supplied electric energy as a resonance condition so that when the electric energy stored in the tank circuit reaches a predetermined value, a saturable reactor connected between the laser device and the tank circuit becomes saturated and the electric energy in the tank circuit is discharged to the laser device.

Abstract: A single-ended switching circuit is constituted by a primary winding of a transformer, a switching circuit connected between the primary winding and a DC power supply and on-off operated with a predetermined cycle and also with a predetermined "on" period and a resonance capacitor connected in parallel with the primary winding. A magnetic amplifier, a rectifying element and a choke coil are connected in series between a secondary side circuit of the transformer and the load. The magnetic amplifier includes a saturable reactor which is held saturated during a half cycle of the voltage induced in a secondary winding of the transformer and remains unsaturated during the other half cycle of the voltage.

Abstract: In an apparatus having a saturable magnetic core, a control winding wound on the magnetic core and supplied with a D.C. voltage in accordance with a desired phase angle, and an output winding wound on the magnetic core and supplied with an A.C. voltage through a load resistor, whereby the firing phase of a thyristor is controlled by a voltage across the load resistor, an additional winding is wound on the saturable magnetic core to detect the saturation of the saturable magnetic core by a rapid drop of a voltage across the additional winding. When the saturation is detected, the magnitude of the A.C. voltage applied to the output winding is increased. The phase angle characteristic of the magnetic phase shifter is determined under a low voltage condition prior to the saturation of the magnetic core, and after the saturation a high voltage is applied to the load resistor.