Abstract:
A method for charging a capacitance connected between DC poles of a three-phase active rectifier/inverter and a converter apparatus comprising a three-phase active rectifier/inverter (10) having a capacitance (C DC ) connected between DC poles thereof, a three-phase filter (20) and a three-phase stepdown transformer (T), wherein the active rectifier/inverter (10) is configured to charge the capacitance (C DC ) connected between the DC poles of the active rectifier/inverter with a rectified secondary voltage of the transformer (T) until a voltage of the capacitance reaches a first predetermined threshold voltage, and, in response to the voltage of the capacitance (C DC ) connected between the DC poles of the active rectifier/inverter (10) reaching the first predetermined threshold voltage, to charge the capacitance (C DC ) with a boosted rectified secondary voltage of the transformer (T) until the voltage of the capacitance (C DC ) reaches a second predetermined threshold voltage higher than the first predetermined threshold voltage.
Abstract:
A converter arrangement comprising a first rectifier (10) having an AC input and a DC output with two DC output poles, a capacitance (C) connected between the DC output poles of the first rectifier (10), a second rectifier (20) having an AC input with two AC input poles and a DC output with two DC output poles, wherein the DC output of the second rectifier is connected between the DC output poles of the first rectifier (10), and a magnetic amplifier (30) comprising at least one control winding (L2) and at least one AC winding (L11, L12), wherein the at least one control winding of the magnetic amplifier is connected between the DC output poles of the first rectifier (10), and wherein the at least one AC winding (L2) of the magnetic amplifier (30) is connected in series with the AC input of the second rectifier (20).
Abstract:
A converter arrangement comprising a first rectifier (10) having an AC input and a DC output with two DC output poles, a capacitance (C) connected between the DC output poles of the first rectifier (10), a second rectifier (20) having an AC input with two AC input poles and a DC output with two DC output poles, wherein the DC output of the second rectifier is connected between the DC output poles of the first rectifier (10), and a magnetic amplifier (30) comprising at least one control winding (L2) and at least one AC winding (L11, L12), wherein the at least one control winding of the magnetic amplifier is connected between the DC output poles of the first rectifier (10), and wherein the at least one AC winding (L2) of the magnetic amplifier (30) is connected in series with the AC input of the second rectifier (20).