Test 230V DC Motor

Greentree_uk

Hi Guys, My grinder in my coffee machine went, so I bought a new one online, however it seems to not work either, I have tested the voltage coming out and its 270V, it seems high usually electrical have 10% tolerance... so the motor seems to be getting power albeit maybe too much. but the seller of the motor is insistent it is a problem with my machine and that the grinders are tested out of the factory. Anyone any ideas for how or where I can test a 230V DC Motor? I'm based in Dublin

The Red Ace

if two motors are behaving the same assuming it is fitted to the grinder remove it and power it on the bench, if it runs that will tell you that something within the grinder is seized.

Greentree_uk

Power it with what? mains is AC. I have already removed the grinder. I don't have anything that generates 230 DC

brightspark

Greentree_uk wrote: »

Hi Guys, My grinder in my coffee machine went, so I bought a new one online, however it seems to not work either, I have tested the voltage coming out and its 270V, it seems high usually electrical have 10% tolerance... so the motor seems to be getting power albeit maybe too much. but the seller of the motor is insistent it is a problem with my machine and that the grinders are tested out of the factory. Anyone any ideas for how or where I can test a 230V DC Motor? I'm based in Dublin

Your post is a bit vague. You think the voltage coming from the unit is wrong, yet you also think the motor is suspect?

What made you think the original motor was faulty?

As previously posted is the mechanism ok?

Greentree_uk

brightspark wrote: »

Your post is a bit vague. You think the voltage coming from the unit is wrong, yet you also think the motor is suspect?

What made you think the original motor was faulty?

As previously posted is the mechanism ok?

The rest of the machine is fine, What does you mean it’s vague? The grinder specifies 230v dc. But does not grind when I connect it to the machine. I am seeking a way to power up the grinder to test it that’s all. I think the replacement part is faulty. The old one had a burnt out smell.

Greentree_uk

Greentree_uk wrote: »

The rest of the machine is fine, What does you mean it’s vague? The grinder specifies 230v dc. But does not grind when I connect it to the machine. I am seeking a way to power up the grinder to test it that’s all. I think the replacement part is faulty. The old one had a burnt out smell.

If it’s not clear the motor is part of the grinder.

brightspark

Greentree_uk wrote: »

The rest of the machine is fine, What does you mean it’s vague? The grinder specifies 230v dc. But does not grind when I connect it to the machine. I am seeking a way to power up the grinder to test it that’s all. I think the replacement part is faulty. The old one had a burnt out smell.

Burnt out smell is a fairly accurate sign that it is bad!

What sort of power supply is in the grinder? Does it have a speed control?

Is it possible that you have damaged the new motor if the power supply is faulty? (You said it was putting out 270V)

Make/model of both the grinder and the motor or other info might help others to give you more help.

If you want to test it with an independent power supply perhaps a DC motor drive is what you need, but obviously that can't be specified without knowing the full details of the motor. Probably not cheap either.

You may also be able to find a motor rewind company in your area who could test the motor for you?


From experience motors burn out for a reason, either mechanical failures of the motor or whatever it drives or issues with the power being supplied.

The Red Ace

Greentree_uk wrote: »

Power it with what? mains is AC. I have already removed the grinder. I don't have anything that generates 230 DC

undo the motor and extend the leads from the grinder that normally power it up that's if you feel capable of doing the job safely, I would have thought that when you mentioned checking voltage etc that you would have known what I meant by bench testing it

Greentree_uk

yes thats exactly what I did, here's a pic of the old motor. https://imgur.com/a/3aQtK

I was looking for another way to test the motor to verify...

its actually rated to 240v so 270v should be ok.