Control transformer for stepless voltage regulation
DE671967C
Voltage regulating transformer without rotation of the phase position
DE643709C
Single or multi-phase combined main and auxiliary transformer
DE631917C
Arrangement to avoid power pulsations in a multi-phase network that feeds a single-phase network via converters or converters connected in parallel with all phases
DE658641C
Method for converting multi-phase current of a given frequency into single-phase current of lower frequency
DE589220C
Voltage regulating transformer without rotation of the phase position
DE630513C
Process for converting multi-phase current of a given frequency into single-phase current of lower frequency while avoiding direct current as an intermediate stage
DE668557C
Method for converting multi-phase current of a given frequency into single-phase current of lower frequency
DE646580C
Multi-phase regulating transformer with core parts that can be moved relative to one another
DE638429C
Voltage regulating transformer
DE604717C
Voltage regulating transformer
DE645121C
Control transformer with core parts that can be moved against each other
