| 摘要 |
An electrical converter (1) comprising a converter input (IN1, IN2) for receiving electrical power; a converter output (OUT1, OUT2) for releasing electrical power; an electrical energy storage device (2) having a storage input connected to a converter input (IN1, IN2) and having a storage output connected to a converter output (OUT1, OUT2).During a primary stroke period (tprim) electrical energy is stored from the received electrical power, and during a secondary stroke period (tsec) electrical energy is released to the converter output (OUT1, OUT2). The electrical converter (1) has a control device (4) comprising: a current sensing device (5) for sensing the amount of current flowing to the electrical energy storage device (2); a first time control device (44) communicatively connected to the current sensing device for controlling the duration of at least one of said stroke periods such that the current flowing to the electrical energy storage device (2) during the primary and secondary stroke is substantially equal to or lower than a predetermined maximum current; and a second time control device (41-43) for controlling the duration of an off-time period (toff) in which the electrical energy storage device (2) releases substantially no electrical energy, such that a time average of the current flowing to the electrical energy storage device (2) is equal to a predetermined value, which time average is the average over a switching period comprising the primary stroke period (t prim), the secondary stroke period (tsec), and the off-time period (toff).
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