Hello all!
I am building a project with an AC/Heater Unit and a PMDC motor. I have 208 VAC going into the AC/Heater Unit and the motor is rated at 130VDC.
Right now, they (AC and motor) are separate from each other. I salvaged the motors from old treadmills and plan to use them to move conveyor belts, so they won't require a lot of power. I measured the slowest, smoothest speed the motor will rotate at is with 1.2 V and .3 amps, which is 3.6 Watts (I used a power supply unit directly connected to the motor's + and - terminals).
Now, I am assuming I will need to build an AC->DC converter circuit that will then feed into a PWM circuit to control the speed of the motor. Note: there will be a step down transformer before the converter circuit.
So my question is this, because this is my first time doing a big project like this: can I "feed" off of the voltage going into the AC Unit to supply the motors since they won't require much power or is this a big no-no? I would assume that I could run +, - and ground lines from the AC unit to the transformer, etc.
I appreciate any help!! I've included a beautiful picture of what I have in mind, in case my description wasn't clear. Thanks!!
I am building a project with an AC/Heater Unit and a PMDC motor. I have 208 VAC going into the AC/Heater Unit and the motor is rated at 130VDC.
Right now, they (AC and motor) are separate from each other. I salvaged the motors from old treadmills and plan to use them to move conveyor belts, so they won't require a lot of power. I measured the slowest, smoothest speed the motor will rotate at is with 1.2 V and .3 amps, which is 3.6 Watts (I used a power supply unit directly connected to the motor's + and - terminals).
Now, I am assuming I will need to build an AC->DC converter circuit that will then feed into a PWM circuit to control the speed of the motor. Note: there will be a step down transformer before the converter circuit.
So my question is this, because this is my first time doing a big project like this: can I "feed" off of the voltage going into the AC Unit to supply the motors since they won't require much power or is this a big no-no? I would assume that I could run +, - and ground lines from the AC unit to the transformer, etc.
I appreciate any help!! I've included a beautiful picture of what I have in mind, in case my description wasn't clear. Thanks!!
Attachments
-
31.5 KB Views: 10