|
DE827220C
|
|
Arrangement and procedure for the precise measurement, regulation and maintenance of low and medium frequencies
|
|
DE826770C
|
|
Arrangement for frequency conversion
|
|
DE581156C
|
|
Arrangement for measuring high and very high voltages by means of a spherical spark gap
|
|
DE588170C
|
|
Arrangement for suppressing the harmonics five times the frequency in the magnetizing current of three-phase transformers
|
|
DE589724C
|
|
Arrangement for frequency conversion in static frequency converters
|
|
DE619234C
|
|
Quiet frequency converter with star-connected primary windings
|
|
DE575183C
|
|
Push-pull amplifier transformer
|
|
DE599956C
|
|
Arrangement for frequency conversion with the help of transformers
|
|
DE674954C
|
|
Quiet frequency converter
|
|
DE539780C
|
|
Arrangement for frequency conversion from a multi-phase system
|
|
DE580008C
|
|
Circuit for frequency multiplication
|
|
DE463784C
|
|
High frequency melting or annealing furnace
|
|
DE595738C
|
|
Arrangement for frequency conversion by means of a static frequency converter
|
