How to made high ampere motor driver..?

[JangKang]

Anyone can help me, how to make the high ampere of motor driver...?
what components that should I'm use...?

[pebe]

AC or DC supply? What is the voltage and current the driver is required to switch?

[JangKang]

it is for DC and trigger from PIC16877A......
i already try basic relay motor driver, from its burning....coz my motor use high ampere.
thank for ur response sir.

[pebe]

To be driven from a PIC, you need logic level power FETs.
For high current types, have a look at these:

http://www.digikey.com/us/en/ph/Interna ... 20Products

[JangKang]

can u help me sir, to combine this all circuit...?
and check it.... here i attch u some motor driver + mosfet...
from other blog that i found.

here : http://www.e-shore.com.my/homepage/all- ... motor.html

[pebe]

The other thread on this board about reverse switching a motor, and to which you posted a question, dealt with using a relay to switch the motor. So I thought you wanted solid state switching instead of a relay.

If you want to use a relay then simply switch it with a transistor driven from your PIC. There are circuits for that in the link you provided. The circuit in Part 1 should be OK.

[Major_Problem]

Main concern is to keep current flowing while switching the motor off. You have to place a high speed flywheel-diode across the DC-motor. Current through the diode is the same as which flows through the motor. When you would use a low-speed diode, very high peak-voltages will occur. Thats why your relay contacts are burning. Also place a large capacitor as buffer for the current. Keep all leads as short as possible between relay (or mosfet), diode and capacitor.

If you need a circuit, please post back.

Greets,
Wim

[JangKang]

yea, i need circuit... Thank for ur's all respond sir.