making a speed control for a 38 volt dc motor

[joe4homes]

I have a 38 volt dc permanent mag. 900 RPM motor. I want to use it for a faceting machine which is for cutting gemstones. Can anybody give me a design to follow to be able to run off of household ac power and control the speed?

[ante]

Hi joe,

Welcome to our forum,

We need to have more info on the motor, A, W and load to know what we are dealing with.
And maybe your budget too!  ;D

[joe4homes]

Thanks for responding to my post. The only other thing on the motors tag is peak current rating:12 amps max. As far as the budget goes, I've don't have any idea what electrical components cost so I dont have any set amount in mind. At this point any suggestions would be great!

[ante]

Hi Joe,

Sorry for the delay, I haven’t been able to log in for a few days!
You need a PWM Pulse Width Modulation control circuit to do this. I don’t know how much you’re into electronics? ;)

[waferstar]

Dear,
There is so many choice for you to use.
1.If you are design a good products,you can choose the MCU to control the PWM CHIP to control the Motor
2.you can use a Mcu with a PWM output to control the MOS transistor to control the motor
3.If you just to design a easy tool for yourself ,you can use the adjustable resistance ,and the NE555,to output the different pulse width to control the MOS and then can adjust the DC motor.

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1.Extract the code for you from programed Mcu for legal use
2.Specilized in the Microwave sensor,automatic door sensor,infrared sensor
3.OEM PCB and design for you in China

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