Projects / Power electronics and energy conversion
Driver module for IGBT and SiC half-bridges: isolated power, isolated control signals, driver-channel protection, and electrical or optical control interfaces.
Power converters based on IGBT and SiC modules needed a separate driver node between the controller and the power module. The board had to charge and discharge gates with the required currents, provide isolation, report faults and remain stable under strong switching noise.
A driver module for two half-bridge switches was developed. Each channel has an isolated gate driver and its own isolated power supply on the power side. The board includes PWM inputs, enable control, fault signal, diagnostic lines, and two control-signal interface options: electrical and optical.
Project materials
Engineering context
In power half-bridges, switching speed, isolation and immunity to false turn-on are critical.
High dV/dt and ground noise can disturb ordinary digital control lines.
Optical signal channels are useful in harsher switching environments.
The driver board acts as an intermediate block between the control electronics and the power module.
Work done
Half-bridge gate-driver circuit design.
Isolated power supply for the power side.
Input circuits for electrical and optical control.
Control circuits for high-side and low-side switches.
Fault diagnostics and fault-signal handling.
Connection scheme for the power module.
Use with IGBT and SiC switches.
Details
The controller generates PWM and enable commands, while the driver board handles isolation, signal amplification, gate power and basic protective functions.
Two interface options allow the board to be used both in compact systems with lower noise and in systems where long control lines and switching transients make a conventional electrical interface less reliable.
The board is suitable for inverters, DC/DC converters, motor drives, laboratory power-electronics benches and power-stage prototypes.
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