Current source power conversion circuit
A power conversion and current-type technology, which is applied in the direction of converting AC power input to DC power output, electrical components, and output power conversion devices, can solve problems such as expensive structures and complex current-type power conversion circuits, and achieve space saving. Effect of simplified circuit structure and reduced loss
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Embodiment approach 1
[0041] figure 1 A part of the circuit diagram of the current-source power conversion circuit of the present embodiment is shown. and, figure 2 A circuit diagram of a conventional current-source power conversion circuit is shown.
[0042] first, figure 2 The circuit shown is a 3-phase current-mode rectifier circuit. exist figure 2 In the figure, the 3-phase current source rectification circuit 101, the 3-phase AC power supply 120, and the LC filter circuit 130 are shown in figure. figure 2 The shown 3-phase current-mode rectifier circuit has 3 half-bridge rectifier circuits connected in parallel with each other. Specifically, the half-bridge rectifier circuit corresponding to r has IGBTs 103r and 105r and diodes 104r and 106r. Also, the half-bridge rectifier circuit corresponding to s has IGBT103s, 105s and diodes 104s, 106s. Also, the half-bridge rectifier circuit corresponding to t has IGBTs 103t and 105t and diodes 104t and 106t. IGBTs 103r, 103s, 103t, 105r, 105...
Embodiment approach 2
[0051] Figure 4 A circuit diagram of the current-source power conversion circuit of the present embodiment is shown. Figure 4 The current-source power conversion circuit shown is a 3-phase current-source rectifier circuit, however, in Figure 4 In , only IGBT 3r and 3s of two phases (r, s) are described in the upper arm, and IGBT 5r of only one phase (r) is described in the lower arm. exist Figure 4 In the current-source rectifier circuit shown, the emitters of the IGBTs 3r and 3s of each phase are connected to the connection line 9, and the emitters of the IGBTs 3r and 3s function at the same potential, and the IGBTs 3r and 3s of each phase are shared. 3s to drive the drive circuit 10r, 10s drive power supply 11. As described above, the drive power supply 11 can also be shared by the drive circuits that drive the IGBT 3t.
[0052] exist Figure 4 A bootstrap circuit is used in the lower arm of the shown current source rectifier circuit, whereby the driving circuit 13 ...
Embodiment approach 3
[0064] Figure 6 A circuit diagram of the current-source power conversion circuit of the present embodiment is shown. Figure 6 The current-mode power conversion circuit shown is a 3-phase current-mode rectifier circuit. Figure 5 The structure of the 3-phase current-mode rectifier circuit shown is the same as Figure 4 The shown three-phase current source rectifier circuit has substantially the same structure, but the difference is that the diode 12 is not included. The diode 12 is a discharge preventing diode for preventing the capacitor 14 from discharging the power supply 11 . In the three-phase current source rectifier circuit of the present embodiment, the function of the diode 12 is replaced by the diode 4r connected in series with the IGBT 3r. However, the diode 4r needs to have the withstand voltage characteristic required for the diode 12. In a voltage-type inverter, a rectifier circuit, or a current-type inverter, a drive power supply is generally provided with ...
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