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| Number | Title | Issue Date |
| 4404472 | Maximum power control for a solar array connected to a load An analog and a digital control is provided which causes a dc to ac inverter operated in the constant power mode to supply sinusoidal current to a utility while drawing maximum power from a solar array. The current drawn from the array is forced to be pro... | 09/13/1983 |
| 4390940 | Process and system for producing photovoltaic power The invention relates to a process and system for obtaining the maximum power from an assembly of photovoltaic cells. According to the invention, the D.C. power furnished by said assembly is converted, with the aid of a converter controlled by a modulated... | 06/28/1983 |
| 4384259 | Electrical power supplies A power supply suitable for energizing an isolation amplifier requiring its input section to be isolated electrically from its output section. The power supply consists of a primary circuit, which, when energized by an electrical supply, converts the elec... | 05/17/1983 |
| 4384317 | Solar powered lighting system A solar powered lighting system including a light emitting unit electrically connected to a rechargeable power storage unit, a solar powered recharger connected to that power storage unit, means to prevent discharge of that power storage unit through the ... | 05/17/1983 |
| 4375662 | Method of and apparatus for enabling output power of solar panel to be maximized The d.c. power supplied by a photovoltaic solar panel to a load is controlled by monitoring the slope of the panel voltage vs. current characteristic and adjusting the current supplied by the panel to the load so that the slope is approximately unity. The... | 03/01/1983 |
| 4367365 | Solar energy conversion arrangement utilizing photovoltaic members An arrangement for converting solar energy directly to electrical energy is disclosed herein and utilizes a group of photovoltaic-like panel members, each of which is designed to convert solar energy into electrical energy by developing a voltage across o... | 01/04/1983 |
| 4349775 | Temperature compensated voltage regulator for photovoltaic charging systems A voltage regulator for use in photovoltaic charging of storage batteries includes a temperature compensated reference voltage. The circuitry of the invention permits fixed temperature coefficient and variable temperature coefficient temperature compensat... | 09/14/1982 |
| 4341607 | Solar power system requiring no active control device A solar power system has a photovoltaic array having a locus of peak power points for various insolation levels, a voltage-dependent variable resistance load such as a water electrolysis unit electrically connected to the array, and a demand-dependent var... | 07/27/1982 |
| 4333136 | Solar powered automatic turn-on control (SPA-TOC) unit and method Orderly control of power applied by a photovoltaic solar panel d.c. source to a load is attained despite varying long and short term solar conditions by coupling power from the panel to an inverter in response to the panel voltage exceeding a predetermine... | 06/01/1982 |
| 4328456 | Camera with solar batteries connected in series or parallel A charge circuit for secondary batteries. The charge circuit encompasses a control circuit having as a power source accumulators chargeable with the current resulting from the electromotive force of a plural number of solar batteries built in a camera. Th... | 05/04/1982 |
| 4327318 | Source shedding regulator A voltage regulator for controlling the photovoltaic charging of storage batteries selectively includes or sheds portions of the photovoltaic array into or from the charging system.... | 04/27/1982 |
| 4315163 | Multipower electrical system for supplying electrical energy to a house or the like A multipower electrical system is disclosed for supplying electrical energy to a house. In one embodiment of the invention utility company power is connected through a switch system to a 100 AMP main connected to the home and also to a timer. The timer co... | 02/09/1982 |
| 4314198 | Solar power source for a lighting system A solar recharged power supply circuit for a lighting system which circuit includes a rechargeable power source, a solar powered recharger connected to that rechargeable power source and which circuit prevents discharge of that rechargeable power source t... | 02/02/1982 |
| 4313078 | Battery charging system A highly efficient battery charging system in which the ampere-hour discharge of the battery is sensed for controlling the battery charging rate. The battery is charged at a relatively high charge rate during a first time period proportional to the extent... | 01/26/1982 |
| 4311953 | Charger using one or more solar batteries A charger, which is useful to power a variety of compact type electronic appliances such as an electronic wristwatch, includes one or more solar batteries as a primary battery, and a sealed type silver oxide battery as a secondary battery. Both the amount... | 01/19/1982 |
| 4306183 | Voltage regulation circuit for a solar cell charging system A voltage regulation circuit includes an active integrator circuit which generates an output signal representing the time integral of the error between the voltage across a load and a reference voltage. The integrator circuit output is connected to a seri... | 12/15/1981 |
| 4295058 | Radiant energy activated semiconductor switch Various circuits and combinations of radiant energy responsive transducer means such as photovoltaic diodes connected to the gate of a depletion mode FET whose source and drain are connected to the gate and cathode of a thyristor, are disclosed to provide... | 10/13/1981 |
| 4291266 | Device for charging an accumulator from an electrical energy source more particularly for an electronic watch The invention relates to an electronic device for charging an accumulator from an electric energy source, more particularly one or more solar cells, intended in particular for an electronic wristwatch. The device represents the equivalent of an ideal diod... | 09/22/1981 |
| 4281278 | Redundant battery protection system A satellite power system in which solar cells provide power to a load during sunlight hours and also charge, through regulators, rechargeable batteries which provide power during dark periods. In order to prevent the batteries from being overcharged by so... | 07/28/1981 |
| 4274044 | DC-DC Converter for charging a battery by means of a solar cell A DC-DC converter is described of the blocking oscillator type, for charging a battery from a solar cell. The use of a field effect transistor enables the oscillation to be started by the voltage from a single solar cell, even if the battery is fully exha... | 06/16/1981 |
| 4266178 | Charge control circuit A charge control circuit for regulating the current applied to a secondary battery utilized as a power supply in an electronic instrument is provided. The secondary battery is adapted to be charged to a predetermined voltage level in response to a chargin... | 05/05/1981 |
| 4243928 | Voltage regulator for variant light intensity photovoltaic recharging of secondary batteries A simplified voltage regulator circuit permits varient light intensity photovoltaic recharging of secondary batteries. The regulator circuit electronically shunts serially connected regions of a photovoltaic recharger array to avoid overcharging during pe... | 01/06/1981 |
| 4223214 | Solar tracking device An improved solar tracking arrangement is provided for directing a solar energy collector to face the sun. An electrical control mechanism is provided to detect misalignment of the collector as the sun traverses in relative movement across the sky. When t... | 09/16/1980 |
| 4212287 | Insolation integrator An electric signal representative of the rate of insolation is integrated to determine if it is adequate for operation of a solar energy collection system.... | 07/15/1980 |
| 4204147 | Power transfer apparatus A power transfer apparatus includes an impedance matching system coupled between a variable voltage source, e.g., a solar cell array, and a load. A parameter of the load indicative of the power being delivered to the load is sensed and the control signal ... | 05/20/1980 |
| 4200833 | Power maximization circuit A power maximization circuit periodically samples the output power of a power supply to regulate output voltage or current toward that resulting in maximum output power. Power increasing variations in voltage or current are continued until maximum power i... | 04/29/1980 |
| 4177795 | Triggering device responsive to energy flow and controlled solar heating system incorporating the device A device, and controlled solar heating system incorporating the device, for providing an electrical control signal responsive to the rate of flow of species of radiant energy through an area. The device includes means for providing an electrical input sig... | 12/11/1979 |
| 4175249 | Self-reconfiguring solar cell system A self-reconfiguring solar cell array wherein some of the cells are switched so that they can be either in series or in shunt within the array. This feature of series or parallel switching of cells allows the array to match the load to achieve maximum pow... | 11/20/1979 |
| 4163194 | Voltage-current-power meter for photovoltaic solar arrays A meter is disclosed for measuring the voltage, current, and power (VIP) parameters of a photovoltaic solar array, or array module, under sunlight operating conditions utilizing a variable load connected across the array and controlled by a voltage regula... | 07/31/1979 |
| 4136309 | Power output control circuit for solar-powered cathodic protection system Metallic structures located in an electrolyte, such as soil or water, for example, tend to corrode. In order to prevent metal loss from the structure due to corrosion, a D.C. current flow is created in the metal structure. This current flow causes a hydro... | 01/23/1979 |
