Abstract: A three-level converter includes at least one phase bridge arm, each including an upper-half and a lower-half bridge arm circuit modules. The upper-half bridge arm circuit module includes a first and a second switch units that are in series connection, and a first diode unit. The lower-half bridge arm circuit module includes a third and a fourth switch units that are in series connection, and a second diode unit. The first and second diode units are connected to the neutral point of the capacitor unit; the second and third switch units are connected to the alternating-current terminal; The first and the fourth switch unit is respectively connected to the positive terminal and negative terminal of the direct-current bus; the capacitor unit is connected to the direct-current bus between the positive and negative terminals. The two modules are disposed side by side and facing each other.

Abstract: The present invention provides a high-power medium-voltage drive power cell, which comprises: a rectifier module for rectifying the three-phase AC input voltage to get a DC voltage; an IGBT (Insulated Gate Bipolar Transistor) inverter bridge connected to capacitors for converting the DC voltage into an AC voltage of which the frequency, the amplitude and the phase are adjustable; a bypass module connected to the IGBT inverter bridge for providing the bypass function when the IGBT inverter bridge works in an abnormal state; and a heat pipe heat sink having a base plate on both sides of which power elements of the high-power medium-voltage drive power cell are disposed.

Abstract: A three-level converter includes at least one phase bridge arm, each including an upper-half and a lower-half bridge arm circuit modules. The upper-half bridge arm circuit module includes a first and a second switch units that are in series connection, and a first diode unit. The lower-half bridge arm circuit module includes a third and a fourth switch units that are in series connection, and a second diode unit. The first and second diode units are connected to the neutral point of the capacitor unit; the second and third switch units are connected to the alternating-current terminal; The first and the fourth switch unit is respectively connected to the positive terminal and negative terminal of the direct-current bus; the capacitor unit is connected to the direct-current bus between the positive and negative terminals. The two modules are disposed side by side and facing each other.

Abstract: The present invention provides a heat sink device, suitable to the heat dissipation of a high-power medium-voltage drive power cell. The device comprises a heat dissipation substrate having a first surface, a second surface and an inner layer between the first surface and the second surface; a heat pipe having an evaporation section and a condensation section. The evaporation section is buried in the inner layer of the heat dissipation substrate, and the condensation section is used to dissipate the heat from the evaporation section to the air. The power elements of the high-power medium-voltage drive power cell are disposed on the first surface and the second surface, respectively.

Abstract: The present invention provides a heat sink device, suitable to the heat dissipation of a high-power medium-voltage drive power cell. The device comprises a heat dissipation substrate having a first surface, a second surface and an inner layer between the first surface and the second surface; a heat pipe having an evaporation section and a condensation section. The evaporation section is buried in the inner layer of the heat dissipation substrate, and the condensation section is used to dissipate the heat from the evaporation section to the air. The power elements of the high-power medium-voltage drive power cell are disposed on the first surface and the second surface, respectively.

Abstract: The present invention provides a high-power medium-voltage drive power cell, which comprises: a rectifier module for rectifying the three-phase AC input voltage to get a DC voltage; an IGBT (Insulated Gate Bipolar Transistor) inverter bridge connected to capacitors for converting the DC voltage into an AC voltage of which the frequency, the amplitude and the phase are adjustable; a bypass module connected to the IGBT inverter bridge for providing the bypass function when the IGBT inverter bridge works in an abnormal state; and a heat pipe heat sink having a base plate on both sides of which power elements of the high-power medium-voltage drive power cell are disposed.