IGC2.4 type single-phase full-bridge high-power IGBT gate driver board

I. Overview
The IGC2.4 single-phase full-bridge high-power IGBT gate driver board is the second-generation IGBT gate designed according to the opinions of the majority of users on the first-generation IGBT gate driver board developed by our company-the IGC-type series driver board. The driver board is developed and produced by applying the national "Eighth Five-Year Plan" research results, using the self-protected IGBT gate driver thick film integrated circuit HL402 as the core unit and externally equipped with high-performance electronic components. The main design features are as follows:
1. Five independent power supplies work. Four independent AC 20V/0.1A and one DC 15V/0.1A power supplies are required during operation. Four AC 20V are used to drive the four IGBT gates in the single-phase full-bridge system. The power supply, and the DC 15V power supply and the user system pulse forming part are the same power supply.
2. It can be used for direct gate drive of two dual-cell IGBTs with a rated capacity of 200A/1200V or 400A/600V.
  3. It has dual protection functions of gate voltage drop and soft turn-off. It can output an alarm signal at the same time as soft turn-off and gate voltage drop. It can be used to block the output of the pulse forming part of the user, and it can also give a contact signal for the user. To break the main circuit of your own system.
  4. The gate voltage drop delay time, gate voltage drop time, and soft turn-off slope can all be adjusted by an external capacitor, so it is suitable for driving and protecting IGBTs with different saturation voltage drops.

II. Component layout and usage
The component arrangement of the IGC2.4 single-phase full-bridge high-power IGBT gate driver board is shown in Figure 1. The external dimensions of the printed board are: length〜width〜height=168mm〜148mm〜30mm, and the mounting hole distance It is: length〜width=158mm〜138mm, there are six connectors for its connection with the outside, and the functions and usage of each plug-in are as follows:



Figure 1

   1. The a1 and b1 of the connector S1 are connected to a 20V winding on the secondary side of the power transformer, and a 28V DC voltage with a floating ground potential can also be input directly from this end, and its G1, C1, and E1 are respectively connected to drive two high-power The gate, collector and emitter of the IGBT corresponding to the input pulse signal g1 in the IGBT.
2. The a2 and b2 of the connector S2 are connected to another 20V winding on the secondary side of the power transformer, and a 28V DC voltage with a separate floating ground potential can also be directly input from the two ends, and the G2, C2, and E2 are respectively connected to be driven four The gate, collector and emitter of the IGBT corresponding to the input pulse signal g2 in the high-power IGBT.
  3. The a3 and b3 of the connector S3 are connected to the third 20V winding on the secondary side of the power transformer. It can also be directly input from the two ends of the 28V DC voltage with a separate floating ground potential, and its G3, C3, and E3 are respectively connected to the driven four The gate, collector and emitter of the IGBT corresponding to the input pulse signal g3 in a high-power IGBT.
  4. The a4 and b4 of the connector S4 are connected to the fourth 20V winding on the secondary side of the power transformer. It can also be directly inputted from the two ends of the 28V DC voltage with a floating ground potential, and its G4, C4, E4 are respectively connected to the driven four The gate, collector and emitter of the IGBT corresponding to the input pulse signal g4 in a high-power IGBT.
   5. The +V, GND, g1, g2, g3, and g4 in the connector S5 are respectively connected to the working power supply of the user system and the reference ground of the positive power supply and the four-way driving pulse signal, and the L terminal is provided to the user system after protection Block pulse signal, which can be directly used to block the output of the pulse forming part.
   6. There is a normally closed contact between the two lead-out terminals of the connector S6. This contact is used to output a signal to break the main circuit of the user system when the driven IGBT is protected by overcurrent or other fault conditions.

Three, parameter restrictions and usage precautions
1. Input and output load capacity
(1) The current output by each drive unit of the IGC2.4 single-phase full-bridge IGBT gate drive board can directly drive IGBT modules with a nominal capacity of 400A/600V or 200A/1200V. Increase the amplification link between the output and the driven IGBT.
  (2) Each drive circuit in the IGC2.4 single-phase full-bridge IGBT gate driver board draws 100mA of energy from the grid, and it requires that the current value provided by DC+V does not exceed 100mA.
  (3) The protective relay contact capacity provided by the control board to the user is AC 380V/0.5A/or 220V/1A.
2. Application Notes
   (1) Prevent the G1, G2, G3, G4 connected to the IGBT gate and the E1, E2, E3, E4 connected to the emitter of the four-channel drive signal output from the drive board from short-circuiting each other.
(2) In order to avoid interference, it is recommended that the lead wires between the power supply and the driver board socket and between the driver board output and the driven IGBT should be as short as possible, the length should not exceed 1m, and the twisted pair or coaxial cable should be used as much as possible Cable shield wire.
(3) When the drive board is used in a single-phase full-bridge inverter system, in order to avoid direct connection, it is recommended to increase the interlock time interval between g1, g3 and g2, g4 in the driving pulse forming part of the user system. Generally, it is 1μS゛5μS.