Intelligent power module, control circuit of intelligent power module and manufacturing method of intelligent power module

Abstract

The invention discloses a control circuit of an intelligent power module. The control circuit comprises three upper bridge arm power devices, three lower bridge arm power devices, a U-phase high-voltage drive integrated tube, a V-phase high-voltage drive integrated tube, a W-phase high-voltage drive integrated tube, a U-phase low-voltage drive integrated tube, a V-phase low-voltage drive integrated tube and a W-phase low-voltage drive integrated tube. The U-phase high-voltage drive integrated tube, the V-phase high-voltage drive integrated tube and the W-phase high-voltage drive integrated tube are in corresponding connection with the three upper bridge arm power devices. The U-phase low-voltage drive integrated tube, the V-phase low-voltage drive integrated tube and the W-phase low-voltage drive integrated tube are in corresponding connection with the three lower bridge arm power devices. The invention further discloses the intelligent power module and a manufacturing method thereof. The intelligent power module adopts a paper heat radiator as a carrier, and heat radiation creases cover the back of the paper heat radiator. The intelligent power module has the advantages of size reduction, weight reduction, cost reduction and effectiveness in heat radiation.

Description

technical field [0001] The invention relates to the technical field of intelligent power modules, in particular to a miniaturized and low-cost intelligent power module control circuit, an intelligent power module and a manufacturing method thereof. Background technique [0002] Intelligent Power Module (IPM, Intelligent Power Module) is a power drive product that combines power electronics and integrated circuit technology. The intelligent power module integrates the power switching device and the high-voltage driving circuit, and has built-in fault detection circuits such as overvoltage, overcurrent and overheating. On the one hand, the intelligent power module receives the control signal from the MCU to drive the subsequent circuit to work, and on the other hand, it sends the system status detection signal back to the MCU. Intelligent power modules win more and more markets with their advantages of high integration and high reliability, and are especially suitable for fre...

AI Technical Summary

Problems solved by technology

[0005] It can be seen from Figure 1(C) that the current intelligent power module is controlled by 1 HVIC tube and 6 IGBT tubes, resulting in long wiring and easy interference between lines. Inconsistent distances make it difficult to control the signal transmission consistency of the six IGBT tubes. In addition, because too much circuit wiring on the substrate will inevitably increase the area of ​​the substrate, resulting in an increase in the area of ​​the current intelligent power module and increasing the manufacturing cost of the intelligent power module , which affects the popularization of intelligent power modules in the low-end field. In addition, due to the need to set aside the circuit wiring area, the distance between components is relatively large, and the state line connecting components through metal wires is relatively long, which affects the state line. reliability, and there is a risk of flushing during the molding process

[0006] Moreover, due to the large distributed inductance and capacitance caused by the structure of the current intelligent power module, resulting in high switching loss, the actual operation of the current intelligent power module generates heat very seriously, so a thick and heavy circuit substrate 206 is needed as a heat sink to help the IGBT tube and FRD tube heat dissipation, for applications with higher power, such as the occasion of driving an inverter air conditioner compressor, as shown in Figure 1 (E), a larger aluminum radiator 220 needs to be connected externally on the circuit substrate 106, increasing It reduces the material cost, transportation cost and application cost of smart power modules, hindering the popularization of smart power modules

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