JPS6392919U - - Google Patents

Description

[Brief explanation of the drawing]

Figure 1 is a battery-voltage characteristic diagram for solar cells as a function of illuminance changes, Figure 2 is a power characteristic diagram for solar cells as a function of illuminance changes, Figure 3 is a current-voltage characteristic diagram for solar cells as a function of temperature changes, and Figure 4 is a diagram for solar cell current-voltage characteristics as a function of temperature changes. A circuit diagram of the first embodiment of the solar cell output control device according to the present invention, FIG. 5 is a circuit diagram of the second embodiment of the solar cell output control device according to the present invention, and FIG. 6 is a circuit diagram of the solar cell output control device according to the present invention. FIG. 7 is a partially omitted circuit diagram of a third embodiment of the output control device. 1: solar cell, 2: load, 3: resistor, 4: solar cell module, Tr1, Tr2: transistor, D1, D2: diode, IC1, IC3: operational amplifier, IC2, IC4: comparator.

Claims (1)

[Claims for Utility Model Registration] (1) In a device in which the output of a solar cell is supplied to a load or a storage battery, a time ratio control switching circuit is inserted between the solar cell and the load or storage battery, and the time ratio control A reference voltage from the output of the solar cell is applied to the switching circuit, and negative feedback control is performed so that the voltage at the operating point becomes a constant voltage near the operating point that provides the maximum conversion efficiency under the conditions in which the solar cell is used. Solar cell output control device. (2) The solar cell output control device according to claim 1, wherein the reference voltage from the solar cell output is generated by a diode or a resistor connected in series with the solar cell. (3) Claims 1 or 2 for registration of a utility model in which the temperature change rate of the voltage of the element that generates the reference voltage is equal to the temperature change rate of the voltage at the operating point that provides the maximum conversion efficiency of the solar cell. The solar cell output control device described. (4) A solar cell output control device according to claim 1, 2, or 3 of the utility model registration claim, which utilizes solar cell output as a driving power source for a duty ratio control switching circuit. (5) The solar cell output according to claim 1 or 2 or 3 or 4 of the utility model registration claim, characterized in that a chopper type DC-DC conversion circuit is used in the duty ratio control switching circuit. Control device.