Schematic diagram of general VVVF inverter
Principle and application of intelligent power module
The IPM series products developed by Mitsubishi Electric Corporation of Japan belong to the third generation of intelligent power modules. It uses the third-generation IGBT to replace the traditional power MOSFET and bipolar Darlington tube, and is equipped with a complete function control and protection circuit to form an ideal high-frequency soft switching module. This type of module is particularly suitable for sine wave output variable voltage (VVVF) frequency converters.
The internal block diagram of IPM series products is shown in Figure 5. The module mainly includes undervoltage protection circuit, circuit driving IGBT, overcurrent protection circuit, short circuit protection circuit, temperature sensor and overheat protection circuit, gate circuit and IGBT. The schematic diagram of the general VVVF inverter composed of this series of products with 16-bit single-chip microcomputer is shown in Figure 6.
Figure 5 Internal block diagram of IPM series products
Figure 6 Schematic diagram of the universal VVVF inverter
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