POWER CONVERSION APPARATUS

摘要

A power conversion apparatus (10) includes a transformer (108), a primary side switch (110), a primary side switch control unit (112), a mode change-over switch (122), a mode change-over switch control unit (124), a secondary side switch (128) and a secondary side switch control unit (130). The primary side switch control unit (112) is configured to turn off the primary side switch (110) and the secondary side switch control unit (130) is configured to turn on the secondary side switch (128) if the power conversion apparatus (10) is operated in a reactive power area. The mode change-over switch control unit (124) is configured to turn off the mode change-over switch (122). Therefore, the power conversion apparatus (10) has functions of a flyback power converter and a function of reactive power compensation.

主权项

1. A power conversion apparatus (10) comprising:
a power input side (102); a power output side (104); a power negative side (106); a transformer (108) electrically connected to the power input side (102); a primary side switch (110) electrically connected to the transformer (108) and the power negative side (106); a primary side switch control unit (112) electrically connected to the primary side switch (110); a first unidirectional conduction unit (114) electrically connected to the transformer (108) and the power output side (104); a first electric charge storage unit (116) electrically connected to the transformer (108) and the power output side (104); a second electric charge storage unit (118) electrically connected to the transformer (108), the first electric charge storage unit (116) and the power negative side (106); a second unidirectional conduction unit (120) electrically connected to the transformer (108) and the primary side switch (110); a mode change-over switch (122) electrically connected to the second unidirectional conduction unit (120), the transformer (108), the first electric charge storage unit (116) and the second electric charge storage unit (118); a mode change-over switch control unit (124) electrically connected to the mode change-over switch (122); a secondary side switch (128) electrically connected to the transformer (108), the power output side (104) and the first unidirectional conduction unit (114); a secondary side switch control unit (130) electrically connected to the secondary side switch (128); and a fourth unidirectional conduction unit (132) electrically connected to the primary side switch (110), wherein the power conversion apparatus (10) is operated in an active power area if a value of an alternating voltage (1042) of the power output side (104) multiplied by a value of an alternating current (1044) of the power output side (104) is not less than zero; the power conversion apparatus (10) is operated in a reactive power area if the value of the alternating voltage (1042) of the power output side (104) multiplied by the value of the alternating current (1044) of the power output side (104) is less than zero; wherein if the power conversion apparatus (10) is operated in the active power area and an absolute value of the alternating voltage (1042) of the power output side (104) is greater than an absolute value of an input voltage (1022) of the power input side (102), the mode change-over switch control unit (124) is configured to turn on the mode change-over switch (122), so that the power conversion apparatus (10) has functions of a reboost power converter; wherein if the power conversion apparatus (10) is operated in the active power area and the absolute value of the alternating voltage (1042) of the power output side (104) is not greater than the absolute value of the input voltage (1022) of the power input side (102), the mode change-over switch control unit (124) is configured to turn off the mode change-over switch (122), so that the power conversion apparatus (10) has functions of a flyback power converter; wherein the primary side switch control unit (112) is configured to turn off the primary side switch (110) and the secondary side switch control unit (130) is configured to turn on the secondary side switch (128) if the power conversion apparatus (10) is operated in the reactive power area; the mode change-over switch control unit (124) is configured to turn off the mode change-over switch (122); therefore, the power conversion apparatus (10) has functions of the flyback power converter and a function of reactive power compensation.