Driver and its system based on parallel connection of multiple power semiconductor devices
A technology of power semiconductors and drivers, applied in the direction of output power conversion devices, electrical components, etc., can solve problems such as inconsistency and affect the current sharing effect of parallel power semiconductor devices, and achieve the effect of improving response speed and ensuring stability
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Embodiment 1
[0044] Embodiment 1: as attached figure 1 As shown, a driver based on the parallel connection of multiple power semiconductor devices, the PWM control signal from the controller 2 outputs gate control signals to n power semiconductor devices 3 connected in parallel with each other through the driver 1, n≥2, the driver 1 includes:
[0045] The logic conditioning module 10 has the functions of signal conditioning and logic processing, and outputs the control signal from the controller 2 to the optocoupler isolation module 20 after signal conditioning and logic processing;
[0046] The optocoupler isolation module 20 outputs the control signal from the logic conditioning module 10 to the processing module 30 after optocoupler isolation processing;
[0047] The processing module 30 has functions such as drive signal conditioning, logic processing, drive signal amplification, fault detection, and power supply voltage stabilization, and processes the control signals from the optocou...
Embodiment 2
[0051] Embodiment 2: On the basis of Embodiment 1, each parallel-connected power semiconductor device 3 further includes m switch tubes, m=1 or 2, and the optocoupler isolation module 20 includes m optocoupler isolation units. When the switch tubes When the number is two, the two switch tubes are connected in series. The processing module 30 includes m processing units. The processing module 30 also includes a voltage negative feedback control module 300 and a DC capacitor connected in parallel to the output of the voltage negative feedback control module 300. The voltage negative feedback control module 300 includes m voltage negative feedback control units. The pole drive module 50 includes m gate drive units, and the logic processing module includes m logic processing units. The logic conditioning module 10 converts the control signal from the controller 2 into m control signals through logic processing, and passes through the optocoupler isolation unit in turn. , a process...
Embodiment 3
[0052] Embodiment 3: as a kind of typical embodiment of the present invention, as attached figure 1 As shown, the PWM control signal from the controller 2 outputs the gate control signal to the two parallel-connected power semiconductor devices 3 through the driver 1, and the gate drive module 50 provides driven signals for the two parallel-connected power semiconductor devices 3 respectively. Gate-on signal and gate-off signal. At the same time, each power semiconductor device 3 connected in parallel also includes two switching transistors connected in series, which are respectively an upper transistor and a lower transistor. Therefore, in this specific embodiment, a total of four switch tubes are included, that is, as shown in the attached image 3 Switch tubes D11, D12, D21 and D22 shown in. Among them, the switch tubes D11 and D12 are connected in parallel, the switch tubes D21 and D22 are connected in parallel, and the switch tubes D11 and D21 are connected in series, a...
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