CN101986503A

CN101986503A - Solar energy wind energy charging circuit with high use ratio and low power consumption

Info

Publication number: CN101986503A
Application number: CN 201010292423
Authority: CN
Inventors: 田明
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-09-27
Filing date: 2010-09-27
Publication date: 2011-03-16

Abstract

The invention provides a solar energy or wind energy charging circuit. The invention is characterized in that the circuit not only can be adaptive to wide variation of external voltage, but also can cause a power tube to operate in switching state only and does not bear linear voltage drop. Thus use ratio of external energy sources of solar energy and wind energy is improved, and meanwhile heat loss of power tube is reduced.

Description

High usage, the solar energy of low-power consumption, wind energy charging circuit

Technical field

This circuit is a kind of circuit that environmental energy (as solar energy, wind energy etc.) is charged to energy-storage travelling wave tubes such as storage battery or electric capacity that is used to solve.Dark when the solar time is bright, wind is then at times strong and at other times weak, therefore the voltage of the electric energy that produces will the time low when high.This makes troubles with regard to the charging of giving the rear end.The voltage of traditional charging modes V1 only is higher than the voltage of B could realize charging, and this has just caused low energy utilization rate.Solar energy or the wind energy plant energy-storage travelling wave tube of standby more multicapacity of having to for this reason, thereby increased cost.Again because that part of voltage that V1 is higher than B all drops on the S1, this has just caused linear impairments, and this loss is the main cause of charging circuit heating, and is more obvious during big electric current, circuit design must adopt the radiator of bigger heat radiation power, promptly increases the reliability that cost reduces circuit again.The present invention then can solve this two problems.Charging circuit of the present invention can be operated in three kinds of patterns.

Pattern 1: when the voltage V1 of outside energy generation was lower than the voltage of rear end B, S2 was open-minded, and S1 is operated in the PWM state.When S1 opened, V1 made the L energy storage by S1, and when S1 turn-offed, the stored energy of L passed through D2, charged to B in S2 and V1 series connection back.

Pattern 2: when the voltage V1 of outside energy generation was higher than the voltage of rear end B, S1 disconnected, and S2 is operated in the PWM state.When S2 opened, V1 was by L, and D2 charges to B, and the voltage drop that V1 is higher than B drops on the L, also made the L energy storage simultaneously.The stored energy of L passed through D2 when S2 turn-offed, and D1 charges to B.

Mode 3: when the voltage V1 of outside energy generation was higher than the voltage of rear end B, the service time that also can make S2 when not needing to limit electric current again simultaneously, L just no longer worked like this greater than making the saturated time of L.Just become the linear-charging mode.

To S1, the control of S2 is realized by the CPU of band AD and PWM function.AD surveys V1, the voltage at B two ends.Decide the time of opening according to U=L*di/dt.Switching tube in the circuit only plays on-off action, does not bear linear voltage drop, so power consumption is more much smaller than the mode of linear-charging, especially powerful the time.

Description of drawings:

Fig. 1 is a high usage, the major loop of the solar energy of low-power consumption, wind energy charging circuit.Wherein V1 is an external voltage, is equivalent to the output of solar panel or wind-driven generator.L is an inductance.D1, D2 are diodes.S1, S2 are switching tubes.B is energy storage devices such as electric capacity, storage battery.

Claims

1. the solar energy of a high usage, low-power consumption, the wind energy charging circuit, no matter external voltage V1 can both realize charging (2) switching tube S1 than high still the hanging down of voltage of energy-storage travelling wave tube B to have (1), S2 has only conduction loss when conducting, and loss (3) charging current that does not have linear voltage drop to cause can be by adjusting S1, and control the switching time of S2.

2. the circuit that can finish 1 described function has following feature: (1) charging main circuit is when the pattern 1 of being operated in, inductance L, diode D2, energy storage device B, switching tube S2 is a series relationship, when S2 turn-offs, D1 plays afterflow effect (3) charging main circuit when the pattern 2 of being operated in, and S1 links to each other D2 in the junction of L and D2, B, S2 series connection back is in parallel with S1.