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#1
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Mounting toroidal transformers
Hi there,
Does anyone know if there is a reason why I cannot mount toroidal transformers one on top of another (stacking them) with a single metal mounting bolt going through both? I can't see anything on the web which suggests I don't do this. Stoat |
#2
Posted to alt.electronics
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Mounting toroidal transformers
"Stoatgobbler" wrote in message ... Hi there, Does anyone know if there is a reason why I cannot mount toroidal transformers one on top of another (stacking them) with a single metal mounting bolt going through both? I can't see anything on the web which suggests I don't do this. Stoat The magnetic flux from one transformer could interact with the other one being that they are that close to eachother. I've seen cases where cases where the toroidal transformer was made up of two or more rings stacked one on top of the other, and then the wire wrapped around them all. I used to repair industrial electronics and I've never seen someone stack toroidal transformers before. They mount them side by side with clearance. Shaun |
#3
Posted to alt.electronics
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Mounting toroidal transformers
Shaun wrote:
"Stoatgobbler" wrote in message ... Hi there, Does anyone know if there is a reason why I cannot mount toroidal transformers one on top of another (stacking them) with a single metal mounting bolt going through both? I can't see anything on the web which suggests I don't do this. Stoat The magnetic flux from one transformer could interact with the other one being that they are that close to eachother. I've seen cases where cases where the toroidal transformer was made up of two or more rings stacked one on top of the other, and then the wire wrapped around them all. I used to repair industrial electronics and I've never seen someone stack toroidal transformers before. They mount them side by side with clearance. Shaun Well, I've mounted them on top of one another, I can't find any problem with it.....however....I've got I've used these toroids to create two split rail power supplies (two independent +22v - 0 - -22v supplies) and to make them independant I've "lifted" the 0v commons from the chassis earth via 60ohm resistors. The greater the current I pull out of the power supply the greater the potential difference across the 60ohm resistor. when I pull 1.1A from the power supply then I have nearly 17v across the 60ohm resistor. This voltage does not seem to vary with raising the upper toroidal away from the lower so I don't think its to do with this. I've never "played" with this, I did expect a voltage across it (due to eddy currents within the transformer?) but I thought it would be nominal....0.25A is not nominal. Is this normal? |
#4
Posted to alt.electronics
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Mounting toroidal transformers
"Stoatgobbler" wrote in message ... Shaun wrote: "Stoatgobbler" wrote in message ... Hi there, Does anyone know if there is a reason why I cannot mount toroidal transformers one on top of another (stacking them) with a single metal mounting bolt going through both? I can't see anything on the web which suggests I don't do this. Stoat The magnetic flux from one transformer could interact with the other one being that they are that close to eachother. I've seen cases where cases where the toroidal transformer was made up of two or more rings stacked one on top of the other, and then the wire wrapped around them all. I used to repair industrial electronics and I've never seen someone stack toroidal transformers before. They mount them side by side with clearance. Shaun Well, I've mounted them on top of one another, I can't find any problem with it.....however....I've got I've used these toroids to create two split rail power supplies (two independent +22v - 0 - -22v supplies) and to make them independant I've "lifted" the 0v commons from the chassis earth via 60ohm resistors. The greater the current I pull out of the power supply the greater the potential difference across the 60ohm resistor. when I pull 1.1A from the power supply then I have nearly 17v across the 60ohm resistor. This voltage does not seem to vary with raising the upper toroidal away from the lower so I don't think its to do with this. I've never "played" with this, I did expect a voltage across it (due to eddy currents within the transformer?) but I thought it would be nominal....0.25A is not nominal. Is this normal? I don't have an answer for you about that. Shaun |
#5
Posted to alt.electronics
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Mounting toroidal transformers
On Feb 17, 3:28*pm, "Shaun" wrote:
"Stoatgobbler" wrote in message ... Hi there, Does anyone know if there is a reason why I cannot mount toroidal transformers one on top of another (stacking them) with a single metal mounting bolt going through both? I can't see anything on the web which suggests I don't do this. Stoat The magnetic flux from one transformer could interact with the other one being that they are that close to eachother. *I've seen cases where cases where the toroidal transformer was made up of two or more rings stacked one on top of the other, and then the wire wrapped around them all. I used to repair industrial electronics and I've never seen someone stack toroidal transformers before. *They mount them side by side with clearance. Shaun Consider placing a soft steel washer just larger in diameter than the toroid between each. |
#6
Posted to alt.electronics
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Mounting toroidal transformers
On Feb 17, 5:33*pm, Stoatgobbler
wrote: Hi there, Does anyone know if there is a reason why I cannot mount toroidal transformers one on top of another (stacking them) with a single metal mounting bolt going through both? I can't see anything on the web which suggests I don't do this. Stoat The strongest magnetic field is produced in a rod shape through the center of the toroid, when stacking them make sure to orient them both with the same side facing up, or to put it another way, opposite sides facing each other if non-horizontally mounted. If they are ran near capacity, they will stay cooler if you do not block one of the larger sides with another (heat-producing) transformer. |
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