Application of Intelligent Module IPM in Dual PWM Inverter

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Application of Intelligent Module IPM in Dual PWM Inverter [Copy link]

Introduction Since the development of frequency conversion technology, with the advancement of technology, the power devices of frequency converters have also experienced the development process from SCR, GTO to IGBT , and the control method has also developed from the initial v/f control to vector control and direct torque control. However, the progress of power conversion technology and the widespread application of power converters have also brought many disadvantages. The public hazards generated by them - electromagnetic interference and harmonic pollution have become social issues of concern to the world. The dual PWM frequency conversion speed regulation technology has become a hot topic of research because it can realize the four-quadrant operation of the motor, high energy conversion efficiency, bidirectional energy flow, especially the convenient realization of the input power factor of the grid side is close to 1 , and the elimination of harmonic pollution.

The rectifier and inverter parts of the dual PWM inverter need to be controlled by six IGBT switches. If a single IGBT switch plus a freewheeling diode is used, the size of the inverter will inevitably increase, which increases the complexity of the design and increases the cost. The IPM intelligent module can easily save costs and reduce the size. The IPM intelligent module introduced in this article is the IPM intelligent module of Fuji Corporation, model 6MBP20RH060 , which has low power consumption, soft switching, high performance and high reliability IGBT with overheat protection . It has built-in overcurrent protection, short circuit protection, control voltage undervoltage protection, overheat protection and external output alarm port. Using such a module as the power device of the dual PWM inverter greatly simplifies the design of the hardware circuit, reduces the size of the power supply, simplifies the wiring, greatly shortens the development cycle, and more importantly, improves the safety and reliability of the system.