Abstract: A gate driving circuit applied to motor inverter includes first power switch circuit, first and second bootstrap fast charging circuits, and first, second and third capacitors. The first power switch circuit includes first and second power switches. The first bootstrap fast charging circuit is electrically connected to the first power switch. The second bootstrap fast charging circuit is electrically connected to the second power switch. The first capacitor is electrically connected to the first power switch. The second capacitor is electrically connected to the first bootstrap fast charging circuit and first insulated switch. The third capacitor is electrically connected to the second bootstrap fast charging circuit and second insulated switch. When the first power switch is disabled and the second power switch is enabled, an independent power supply enables the second bootstrap fast charging circuit to charge the third capacitor to enable the second insulated switch.

Abstract: A gate driving circuit applied to motor inverter includes first power switch circuit, first and second bootstrap fast charging circuits, and first, second and third capacitors. The first power switch circuit includes first and second power switches. The first bootstrap fast charging circuit is electrically connected to the first power switch. The second bootstrap fast charging circuit is electrically connected to the second power switch. The first capacitor is electrically connected to the first power switch. The second capacitor is electrically connected to the first bootstrap fast charging circuit and first insulated switch. The third capacitor is electrically connected to the second bootstrap fast charging circuit and second insulated switch. When the first power switch is disabled and the second power switch is enabled, an independent power supply enables the second bootstrap fast charging circuit to charge the third capacitor to enable the second insulated switch.

Abstract: A method for controlling output energy of a power system includes following steps: Using a controlling unit to detect a phase offset between voltage and current of an AC power outputted from the power system. When the power system enters an energy-storage cycle, the controlling unit makes a power conversion unit output the AC power having a first preset power factor and store a partial energy of an AC grid in an energy-storage unit when the AC power is in a reactive power area. When the power system enters an energy-release cycle, the controlling unit makes the power conversion unit output the AC power having a second preset power factor and release the energy stored in the energy-storage unit, wherein an average value of the power factor in the energy-storage cycle and the energy-release cycle is the same as a preset average power factor.

Abstract: A method for controlling output energy of a power system includes following steps: Using a controlling unit to detect a phase offset between voltage and current of an AC power outputted from the power system. When the power system enters an energy-storage cycle, the controlling unit makes a power conversion unit output the AC power having a first preset power factor and store a partial energy of an AC grid in an energy-storage unit when the AC power is in a reactive power area. When the power system enters an energy-release cycle, the controlling unit makes the power conversion unit output the AC power having a second preset power factor and release the energy stored in the energy-storage unit, wherein an average value of the power factor in the energy-storage cycle and the energy-release cycle is the same as a preset average power factor.

Abstract: A reboost power conversion apparatus (10) having a flyback mode includes a transformer (108), a primary side switch unit (110), a primary side switch control unit (112), a first unidirectional conduction unit (114), a first electric charge storage unit (116), a second electric charge storage unit (118), a second unidirectional conduction unit (120), a mode change-over switch unit (122) and a mode change-over switch control unit (124). The reboost power conversion apparatus (10) has functions of a reboost power conversion apparatus when the mode change-over switch control unit (124) is configured to turn on the mode change-over switch unit (122). The reboost power conversion apparatus (10) has functions of a flyback power conversion apparatus when the mode change-over switch control unit (124) is configured to turn off the mode change-over switch unit (122).

Abstract: 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.