Showing papers on "Power module published in 1970"
Patent•
06 Aug 1970TL;DR: In this article, the voltage difference between the large solar array or the given fraction thereof and the reference solar array is used directly as means to constrain the large array to operate at the voltage of maximum power, typically any excess power being used to charge a storage battery.
Abstract: In a power solar cell array consisting of many solar cells connected to deliver useful electrical power, there is imbedded a smaller reference solar array consisting of solar cells connected in series with a Zener diode and load resistor so devised that the voltage that appears across the load resistor is equal to or a constant fraction of the voltage at which the power array, operating at the same temperature and solar exposure as the reference array, delivers maximum electrical power. The voltage difference between the large solar array or the given fraction thereof and the reference solar array is used directly as means to constrain the large array to operate at the voltage of maximum power, typically any excess power being used to charge a storage battery.
124 citations
Patent•
26 Feb 1970
TL;DR: In this paper, a power transistor type power switch is used for AC-to-AC power regulation circuits with power switch in series with the line and load, the conduction period or angle of the power switch means being controlled to regulate the power output, which can be operated into a short circuit load without damage to the power regulation circuit.
Abstract: AC-to-AC power regulation circuits with power switch means in series with the line and load, the conduction period or angle of the power switch means being controlled to regulate the power output Transistor type power switch means is turned on at zero current phase and turned off at the end of the desired conduction period Capacitative line filtering is employed to minimize electromagnetic interference (emi), with marked weight reduction as compared with conventionally used inductive line filtering, rendering the circuits especially advantageous for aircraft use, such as for lamp dimmers, windshield temperature controllers, and aircraft AC power supplies in general Bi-directional transistor type power switch means in circuits of the present invention, with proper bias, are inherently current-limiting and therefore can be operated into a short circuit load without damage to the power regulation circuit Such power switch means, as contemplated by the invention, are power transistors, in contrast to conventionally used silicon controlled rectifiers (SCRs)
14 citations
TL;DR: In this article, a wattmeter with a wide-band (dc to 10 MHz) linear multiplier is used to observe the instantaneous product of the time-varying voltage and current in an arbitrary load.
Abstract: A technique is presented for accurately measuring and displaying the magnitude and time function of the exchange and absorption of electrical energy in linear and nonlinear circuit elements such as semiconductor power switches. A novel electronic wattmeter with a wide-band (dc to 10 MHz) linear multiplier is used to observe the instantaneous product of the time-varying voltage and current in an arbitrary load. Experimental data show that the peaks of power dissipation during the turn-on and turn-off phases of a switching power transistor are much greater than the power dissipated during the time intervals of settled current flow. Furthermore, it is verified experimentally that the average power dissipation increases linearly with the transistor pulse-repetition frequency beyond a static (dc) value. The absence of such a frequency-dependent component of power dissipation in switches of resonant-current circuits is also confirmed.
11 citations
Patent•
27 Jul 1970TL;DR: In this article, a hybrid circuit is formed on an electrically insulative, thermally conductive substrate surface with an alternating current inverter bridge having associated with a switching serving diode.
Abstract: A hybrid circuit is formed on an electrically insulative, thermally conductive substrate surface with an alternating current inverter bridge having associated therewith a switching serving diode. In one form the bridge and the switch serving diode are integrated within a single semiconductive element while in another form the switch serving diode may be integrated into a thyristor semiconductive element so that the thyristor has no reverse current blocking capability.
10 citations
01 Jan 1970
TL;DR: In this article, a hybrid integrated power transistor module delivering 16-W CW at 3 GHz with 100 mW of drive power at 1.5 GHz was described and the minimum efficiency over a 13% bandwidth is 12%.
Abstract: A hybrid integrated power transistor module delivering 16-W CW at 3 GHz with 100 mW of drive power at 1.5 GHz will be described. The minimum efficiency over a 13% bandwidth is 12%.
4 citations
TL;DR: In this article, a power supply system for colour receivers is described, which is based on a single control system switching at the horizontal time base frequency, which stabilizes various output voltages.
Abstract: A power supply system for colour receivers is described. Stabilization of various output voltages is achieved by a single control system switching at the horizontal time base frequency. Mains isolation is included in the ferroxcube transformer which has also windings to supply the CRT heater and to drive the base of a horizontal output transistor.
3 citations
TL;DR: The physical design includes the extensive use of plug-in modules for ease of maintenance, convection cooling of the entire power supply including the test load, and a key interlock system which prevents access to high voltage components when the power supply is energized.
Abstract: This article describes the constant current, high voltage power facilities which power the SF Submarine Cable repeaters. The overall power system description includes discussions of the power connections to the cable, and a review of overall design requirements and objectives. The circuit description is covered in a general manner to demonstrate the basic concept. Particular emphasis is given to the description of several significant circuit innovations which include automatic load sharing by two constant current sources, 20 kHz inverter operation with output wave symmetry correction, solid-state alarm detectors, automatic turn-up and turn-down features, electrical noise suppression, redundant shutdown circuits and selective alarm cutoffs. The physical design includes the extensive use of plug-in modules for ease of maintenance, convection cooling of the entire power supply including the test load, and a key interlock system which prevents access to high voltage components when the power supply is energized. A special high-voltage switch can transfer the cable from one power plant to another without interruption of service.
3 citations
TL;DR: In this paper, the authors present an all-solid-state colour receiver for the horizontal deflection stage, where the large switching power to be handled by the output device and the inherent danger in CRT arcing of the 25 kV ultor voltage generated in this stage present considerable problems to the designer as well as to the solid state devices.
Abstract: When designing all-solid-state colour receivers, most stingent problems are usually encountered in the horizontal deflection stage. The large switching power to be handled by the output device and the inherent danger in CRT arcing of the 25 kV ultor voltage generated in this stage present considerable problems to the designer as well as to the solid state devices.
3 citations
TL;DR: An outline of the philosophy underlying the Federal Power Commission's study of the reliability of electric power systems and their distribution networks is presented in this article, where the steps required for the prevention of major power outages of wide extent and substantial duration are set forth.
Abstract: An outline of the philosophy underlying the Federal Power Commission's study of the reliability of electric power systems and their distribution networks is presented. A broad review of bulk power system reliability is given. The steps required for the prevention of major power outages of wide extent and substantial duration are set forth.
2 citations
01 Jan 1970
TL;DR: In this paper, a low-threshold-voltage, radiation-resistant complementary metal-nitride-oxide-semiconductor (CMNOS) arrays have been constructed utilizing a multilayer nitrid-oxide gate insulator.
Abstract: Low-threshold-voltage, radiation-resistant complementary metal-nitride-oxide-semiconductor (CMNOS) arrays have been constructed utilizing a multilayer nitrid-oxide gate insulator. Both the n- and p-channel CMNOS devices havre threshold voltages that are typically 0.5 to 0.9 V. This low threshold permits operation of the arrays with a 5-volt power supply providing very low power dissipation and low insulator electric fields.
01 Jan 1970
20 Apr 1970
TL;DR: In this paper, three basic power IC approaches; the monolithic, chip, the "monobrid" circuit (a few chips), and the IC driver with external power transistors, are described.
Abstract: Power IC products are still relatively new. The old idea that an IC is limited to only low power applications is giving way as an attack on power functions is being made by the IC industry. The techniques used in the products which are available today are presented and the three basic power IC approaches; the monolithic, chip, the "monobrid" circuit (a few chips), and the IC driver with external power transistors, are described.
01 Jun 1970
TL;DR: Experimental design of high voltage low current power source for unmanned, long term space mission as discussed by the authors, which was used for a mission to the International Space Station (ISS) in 2011.
Abstract: Experimental design of high voltage low current power source for unmanned, long term space mission