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Using Arduino => General Electronics => Topic started by: Joaco2799 on May 19, 2019, 02:20 am

Title: Doubt with transformer and DC motor
Post by: Joaco2799 on May 19, 2019, 02:20 am
It turns out that I have a transformer that outputs 12v and 800mA and also a DC motor that requires 12v and 130mA

The question is, If i connect the transformer to the motor, will it burn?
Title: Re: Doubt with transformer and DC motor
Post by: WattsThat on May 19, 2019, 02:29 am
Having a power supply with excess ampacity is actually a good thing. A higher than required voltage would be bad but a higher available current, no problem.
Title: Re: Doubt with transformer and DC motor
Post by: jremington on May 19, 2019, 02:39 am
In general, circuits draw the required current.

For motors, the current draw depends on the load and is very high when the motor starts. This is called the stall current, and is often 5-10X higher than the running current.

Your power supply must be able to provide the stall current, or close to it. What is the stall current for your motor?
Title: Re: Doubt with transformer and DC motor
Post by: slipstick on May 19, 2019, 11:07 am
Just to be sure...note that a "transformer" is an AC device.

If what you really have is a power supply you're fine. But if you really have a simple transformer then trying to run a DC motor on AC is a bad idea.

Steve