Yes, it is possible. However, note that there are two ways to wire the outputs together, parallel and series. In series, the voltages add at the same current. In parallel, the currents add at the same voltage.
The truth is that you can connect two transformers so long as you are careful, but you need to know why youre doing it. Then, of course, you need to do it properly. Transformers have a VA (volt-amps) rating that dictates how many volt-amps the transformer can handle on the secondary.
0:535:57How to wire a transformer in series or parallel (with animation) | Basic YouTubeStart of suggested clipEnd of suggested clipAnd if you connect five and two together then. Its basically from top to bottom one. Series circuitMoreAnd if you connect five and two together then. Its basically from top to bottom one. Series circuit but if you connect to two six and five to one then those two halves of the primary.
The short answer is that yes, you can use a transformer backwards. Actually the transformer has no way to tell what direction power is flowing so it really cant care. You of course cant feed in the original voltage, yo have to feed in the lower voltage appropriate for the winding that is now the primary.
The primary and secondary windings of a transformer can be connected in different configuration as shown to meet practically any requirement. In the case of three phase transformer windings, three forms of connection are possible: “star” (wye), “delta” (mesh) and “interconnected-star” (zig-zag).
If two transformers of different voltage ratio are connected in parallel with same primary supply voltage, there will be a difference in secondary voltages. As the internal impedance of transformer is small, a small voltage difference may cause sufficiently high circulating current causing unnecessary extra I2R loss.
However, note that there are two ways to wire the outputs together, parallel and series. In series, the voltages add at the same current. In parallel, the currents add at the same voltage. With your two 6 kV 30 mA outputs in series, you would get 12 kV at 30 mA.
A transformer that increases the voltage from primary to secondary (more secondary winding turns than primary winding turns) is called a step-up transformer. Conversely, a transformer designed to do just the opposite is called a step-down transformer.
Transformers are bidirectional devices, transformers dont know nor care which way power flows through them. Transformer can pass real power from primary to secondary while simultaneously passing reactive power from secondary to primary.
Therefore, RMS value of emf per turn = 1.11 x 4f Φm = 4.44f Φm. This is called the emf equation of transformer, which shows, emf / number of turns is same for both primary and secondary winding. For an ideal transformer on no load, E1 = V1 and E2 = V2 .
3) Which connection is used for a Step Down Transformer? A Step Down Transformer used two types of connections, one is star delta & the other one is delta star.
The transformers should be properly connected with regard to their polarity. If they are connected with incorrect polarities then the two EMFs, induced in the secondary windings which are in parallel, will act together in the local secondary circuit and produce a short circuit.
Parallel Connected Secondary Transformer Of course different dual voltage transformers will produce different amounts of secondary voltage and current but the principal is the same. Secondary windings must be correctly connected together to produce the required voltage or current output.
The transformers are connected in parallel when load on one of the transformers is more than its capacity. The reliability is increased with parallel operation than to have single larger unit. The cost associated with maintaining the spares is less when two transformers are connected in parallel.
As mentioned before, transformers do not allow DC input to flow through. This is because a change in current cannot be generated by DC; meaning that there is no changing magnetic field to induce a voltage across the secondary component. Figure 1. A simple operating transformer.
Definition: A transformer that doesnt have any losses like copper and core is known as an ideal transformer. In this transformer, the output power is equivalent to the input power. The efficiency of this transformer is 100%, which means there is no loss of power within the transformer.
TRANSFORMER POLARITY TEST Connect a portable voltmeter across the primary and secondary terminals on the right side of the transformer. Apply a low voltage (around 120 volts) to the primary terminals; this will result in a voltage of about 12 volts across the secondary winding (provided the turns ratio is 10:1).
Why is BERT bidirectional?
BERT is bidirectional because its self-attention layer performs self-attention on both directions. In OpenAI GPT, the love token would only have a self-attention relationship with the I token and with itself (only backwards). In BERT the same token would have self-attention with every other token in the sentence.