Motorcycle Battery Charger
In the market widely available variety of battery chargers with different technical features ranging from a low amperage to charge the system automatically. This feature is very necessary to improve battery charger system is good and reliable for various purposes, such as a motorcycle battery charger.
Here is a motorcycle battery charger circuit which also has a good feature. This feature is a feedback control circuit where the battery is fully charged condition at the maximum rate. If the battery is fully charged condition encountered, it will be marked with an LED that is turned on.
This motorcycle battery charger is specifically designed for a 12V battery. Apart from some small-sized electronic components like IC LM350, LM1458, and the passive components, used a 18V step-down transformer 80 watt. You simply select a single output voltage 0-18V with a current of about 4-5A. The cable used should have the ability matching a little larger than the current passing. In order to prevent any change electrical energy into heat in the cables that can lower the voltage level.
When construction of the motorcycle battery charger is finished turn the TR1 in place zero value, then the steps for setting the control.
check without connecting the battery, that both LED’s light up.
Connect a car battery charger. Check that the LD2 is off and that a current (typically 2 until 4 A), flows to the battery.
Turn the TR1 and check that the LD2 can turn and charge current to cut.
Turn the TR1 to null value and charge the battery using the standard technique hydrometer (if not available, use a battery in good condition and fully charged).
Turn carefully so that the TR1 LD2 begins to turn and charge current drops to a few hundred mA. If TR1 installed correctly then the next load will see the first LD2 will start to flicker, and charging the battery. When fully charged the battery then the LD2 will turn on fully.
Motorcycle Battery Charger Circuit
To TR1 no longer needs another adjustment. The Q1 is connected in series with the circuit of the battery and can be fired from the circuit R3-4 and LD2. The battery terminal voltage is obtained from the circuit R2, C1, TR1, D2 and activates the Q2 when the voltage terminals exceeds the value we are striving to TR1.
When an uncharged battery put on charge the terminal voltage is low. under this situation the Q2 turn off and Q1, fired in each half cycle of the circuit R3-4, LD2. The Q1 functions as a simple rectifier. While charging the battery, the terminal voltage increases. If the terminal voltage rises above the level that we have set to TR1, then shifts the Q2 gate drive of Q1, it turns off, stop giving power to the battery and lights LD2, showing us that the loading is complete.
The Q1 and the bridge rectifier GR1, should be placed on a good heatsink for proper cooling. The M1 is an Amperemeter DC 5A, so we can monitor the charging current. Optionally can be placed a Voltmeter in parallel with the poles of the battery should have high input impedance, however, not affect the circuit measuring device.
