Abstract: Apparatus is described that regulates the transfer of voltage, current, or power from an AC line to a load. The basic controller comprises an inductive element and a switch whose closing converts the inductive element from a series inductance between line and load to a step-down auto-transformer between line and load thus reducing the voltage available to the load and thereby reducing or terminating energy transfer to the load. The switch is connected in series with the inductive element and the combination of the switch and one winding of the auto-transformer is connected in parallel with the load. The controller can therefore be thought of as a switched reactance AC shunt regulator. Theoretically, shunt power in the controller is losslessly returned to the source. The controller is used to regulate any parameter related to the current through the load, the voltage across the load, or the power dissipated by the load simply by controlling the switch with any suitable means for sensing that parameter.

Abstract: An improved voltage controller for a synchronous electric machine of the type including a voltage controller including a controlled rectifier coupled thereto which is optimally matched to the parameters of the machine for its non-loaded condition. The improvement comprises a modulator coupled to the excitation winding and the controller of the machine, for generating a control signal which is proportional to the cosine of the load angle of the machine. The modulator modulates any output signal generated by the voltage controller of the machine according to the generated control signal. A voltage compensator coupled to the modulator generates a voltage compensation signal which is proportional to the current induced in the stator winding of the machine by the load applied thereto. The compensator also adds the compensation signal generated to the modulated output signal of the controller, which signals in combination form the voltage control input signal to the controlled rectifier of the machine and increase the current in the excitation winding of the machine in response to a load applied thereto, and thereby compensate for the reaction produced by the current induced in the stator winding of the machine by the load.

Abstract: A high voltage generator for X-ray diagnosis apparatus includes a high voltage transformer with at least one primary winding connected to an alternating current net and at least one secondary winding feeding the X-ray tube as well as means adjusting the high voltage by changing the primary alternating voltage. These means are connected to a rectifier bridge located in the primary circuit of the high voltage transformer. The invention is particularly characterized in that these means are formed by a variable resistance connected to the outlet of the rectifier.

Abstract: A power control apparatus for controlling the power transmitted over a direct-current line connected between alternating-current lines is disclosed. The direct-current line is connected to the alternating-current lines by a converter and inverter respectively. The power control apparatus includes a converter firing unit connected to the converter, a converter current controller connected to the converter firing unit, and a power regulator connected to the converter current controller for supplying the same with a current reference value. An inverter firing unit is connected to the inverter and a voltage controller and an inverter current controller are provided for setting respective voltages on the direct-current line. One of these voltages is smaller than the other at a given time. A connection circuit connects the last-two mentioned controllers to the inverter firing unit so as to cause the controller corresponding to the one voltage to act upon the inverter firing unit at the given time. The inverter current controller has an input for receiving a current reference value smaller than the current reference value supplied to the converter current controller. The inverter current controller is configured to stabilize the current in the direct-current line to the current reference value supplied to the inverter current controller in a predetermined time interval. A remote transmission arrangement is connected between the power regulator and the inverter current controller for adjusting the current reference value supplied to the inverter current controller in response to a change in the power after the time interval has elapsed.

Abstract: This invention contemplates a regulated high voltage power supply circuit for a high voltage generator circuit of a television receiver set wherein a high voltage controlling saturable reaction is connected in series to an output winding of a flyback transformer and the inductance of the saturable reactor is varied dependent on variations in beam current, whereby the anode voltage of a cathode ray tube is regulated against the variations in beam current.

Abstract: A constant current source for the operation of multiple coil systems, utilizing a static winding and one or more dynamic windings effective at a common air gap, including a constant operational voltage source, a corrective element between the operation voltage source and static winding, and a current control system operative to control the correcting element, in which a corresponding higher operational voltage is applied to the static winding in the presence of subtractive voltages induced in the static winding as a result of the dynamic winding, with the corresponding higher operational voltage being derived from an independent voltage source or from the charge on one or more capacitors, arranged for charging to the lower operational voltage and adapted to be connected in series to provide a multiple of such voltage.

Abstract: A high voltage pulse regulator has its anode-cathode circuit shunted across the primary winding of an autotransformer for controlling the magnitude of the voltage developed. The secondary winding (high voltage winding of the autotransformer) is coupled to the primary through a series capacitor. A sensing diode connects the junction of the high voltage winding and capacitor to the input of the pulse regulator.