ICS TRIPLEX 9451 Single-supply IPM module

The ICS TRIPLEX 9451 mainly integrates driving, protection and system control functions, specifically including these features below:
(1) Three-phase IGBT inverter bridge with gate drive circuit and protection circuit.
(2) The upper bridge arm driver power supply uses bootstrap power technology;
(3) All drivers share a common power supply;
(4) Containing isolated high-voltage fast level shifting circuit (level shifter); (5) The control signal does not require optical transmission.
(5) Control signals do not require optocoupler isolation.

ICS TRIPLEX 9451 is the most important feature is the realisation of a single power supply drive, the core technology is the drive power using bootstrap power technology and level shifting circuits, the schematic diagram shown in Figure 4. Among them, bootstrap power supply is composed of R1, D1, C1 in Figure 4, IGBT1 and IGBT2 constitute one phase of the bridge arm. The charging circuit of the bootstrap power supply can be seen in Fig. 4 as R1, D1, C1, IGBT2 and N. This single-supply drive technology provides the system with a common ground scheme design.

ICS TRIPLEX 9451 using a common ground scheme designed frequency control controller, reducing the number of PWM signal isolation opto-coupler and switching power supply power supply; simplify the current detection and voltage detection circuit, the entire system hardware design in terms of cost and performance have been optimized to a large extent, to meet the low-cost, high-performance requirements. The advantage of using the common ground scheme is to simplify the design of hardware circuits to a large extent, FBM214 gives the structural schematic diagram of the inverter speed controller based on a single-supply IPM module designed using the common ground scheme.