AC motor control with 8051

i want to control the 240V AC single phase motor by using 8051..
i want to control the direction of the motor and the swithcing on the motor POWER~~
my concept is when a switch i press, the direction of the motor will change..
waht i want to know is:
-do i need a relay for the direction .
-what should i include in the hardware.
-anyone got the assembly code ...?

thx

Do you really want to use 8051, then search for the letest Microcontrollers form the ATMEL which has at least 6 PWM channel and then use the Variable Frequnce Method to control the AC 1-pahse motor.

You need Opto isolators (highspeed), IGBTs (6), Switches(FWD/REV,STOP/START) etc.

For more info please download the Application note form Microchip; AC motor control using PIC18F and try to immitate using ATMEL's uC.

Atmel has recently launched new IGBT drivers for AC motors which doesn't require programming you can also use that with 89c52 (to make f00ll others).

And yes, I recommend you to reffer some good VFD Drive manuals for IDEAS, one of the best (till I found) is

www.delta.com.tw

Download there AC drive manual (VFD L- series) they are usinign 16-bit uC for operation. It really helps in adding few more features to your project.

Best of luck!

Not really need to use 8051 but this is the only microcontroller i quite familiar right now. any recommendation other than 8051 ?
PS: the ac motor also come with a motor controller which the model is DVUS analogue speed controller . voltage supply is 240V and nominal speed of 1500 r/min at 50hz
its' front panel have a potentiometer and a "ON-OFF" switches

.. the ac motor also come with a motor controller which the model is DVUS analogue speed controller . voltage supply is 240V and nominal speed of 1500 r/min at 50hz .. its' front panel have a potentiometer and a "ON-OFF" switches

Click to expand...

Is your intention to use that controller and add a microcontroller to it?
Mechanical potentiometer can be replaced with a digital one, switches with relays .. and so on ..

Regards,
IanP

its' part of my project is using microcontroller to control the direction and speed of the ac motor...
btw, will using the motor controller ease up my job in designing for this project?
ps : my budget in this project is low and duration of time qutie short, so i hope that the apparatus that i need to buy is within the budget...

sorry for intrupt but i want to make VFD for 1-phase and 3-phase ac motor, any idea , how to.

hi

it is tested circuit

jamesa , i am wandering about how are you going to change motor direction for single phase AC motor ? You have just 2 wires ...

For the circuit, is there a code available?