LTC1042M データシートの表示（PDF） - Linear Technology

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LTC1042M

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Linear Technology 

LTC1042

APPLICATIO S I FOR ATIO

Wind Powered Battery Charger

A simple wind powered battery charger can be

constructed using the new LTC1042, a 12V DC permanent

magnet motor, and low cost power FET transistor.

The DC motor is used as a generator with the voltage

output being proportional to its RPM. The LTC1042

monitors the voltage output and provides the following

control functions:

1) If generator voltage output is below 13.8V, the control

circuit is active and the NiCad battery is charging

through the LM334 current source. The lead acid

battery is not being charged.

2) If the generator voltage output is between 13.8V and

15.1V, the 12V lead acid battery is being charged at

about a 1A/hour rate (limited by the power FET).

3) If generator voltage exceeds 15.1V (a condition caused

by excessive wind speed or 12V battery being fully

charged) then a fixed load is connected thus limiting

the generator RPM to prevent damage.

This charger can be used as a remote source of power

where wind energy is plentiful, such as on sailboats or

remote radio repeater sites. Unlike solar powered panels,

this system will function in bad weather and at night.

WIND

12V

GENERATOR

LM334

68Ω

4.5V

NiCAD

BATTERY

215k

100k

10k LT1004-1.2

107k

1N4001

10k

1

2

3 LTC1042

4

0.1µF

0.1µF

WITHIN

WINDOW

13.8V TO 15.1V

+

12V

LEAD ACID

MTP8N05

8

10M

7

6

5

+

OVER VOLTAGE

0.1µF

(>15.1V)

36Ω

5W

MTP8N05

LTC1042 • A105

Information furnished by Linear Technology Corporation is believed to be accurate and reliable.

However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-

tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.

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