Circuit assembly having a transformer with centre tapping and measuring of the output voltage
AssigneeFronius International GmbH
InventorsChristian Magerl, Franz Peter Musil, Robert Eberl, Friedrich Steinmaurer
Life of this patent
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Abstract
To enable in a circuit arrangement (8) with a transformer with center tap the voltage measurement on the secondary side simply and safely, it is provided that at least two series-connected resistors (R3, R4) are connected between the two outer connections (A1, A2) of the secondary side of the transformer (T) to form a measurement point (P) between the two resistors (R3, R4), and a voltage measurement unit (V) is provided to measure the voltage (UP) between the measurement point (P) and the second output pole (13), which corresponds to the output voltage (UA).
Claims9
A circuit arrangement comprising:
- at least one transformer with center tap,
- wherein, on a secondary side of the at least one transformer having two outer connections and a center point, the center point of the secondary side of the transformer is connected via a first output line to a first output pole and each of the two outer connections are connected via respective electrical circuit elements and a second output line to a second output pole,
- a measurement apparatus for measuring an output voltage applied between the first output pole and the second output pole,
- wherein at least two series-connected resistors are connected between the two outer connections and a measurement point is formed between the two resistors, and
- a voltage measurement unit configured to measure a voltage between the measurement point and the second output pole, which corresponds to the output voltage.
A method for determining an output voltage between a first output pole and a second output pole, wherein the first output pole is connected to a center point of a secondary side of a transformer and the second output pole is connected to two outer connections of the secondary side of the transformer via electrical circuit elements,
- measuring a voltage between a measurement point, formed between at least two series-connected resistors that are connected between the two outer connections, and the second output pole that corresponds to the output voltage.
Dependencies are inferred from the claim text.