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Power transformer as audio transformer
Tio Pedro wrote:
The same problem with the DC flow in the transformer exists when a power transformer is used with a halfwave rectifier. Typically the transformer rating is degraded by 60% when be using with halfwave rectication due to the DC current flowing in the secondary. No, the DC currents sum to zero. That derating is only required when the transformer secondary is poorly balanced. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." |
#2
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Power transformer as audio transformer
"Scott Dorsey" wrote in message ... Tio Pedro wrote: The same problem with the DC flow in the transformer exists when a power transformer is used with a halfwave rectifier. Typically the transformer rating is degraded by 60% when be using with halfwave rectication due to the DC current flowing in the secondary. No, the DC currents sum to zero. That derating is only required when the transformer secondary is poorly balanced. --scott How does that occur in a half-wave circuit? It is a series circuit. The half-wave rectifier produces a voltage across the load that is a complex waveform with both a DC and an AC component. Since it is a series circuit, the same situation exists in the transformer secondary. DC sums would be zero with a full wave rectifier or a full-wave voltage doubler. Pete |
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