Single-phase DC Inverter Air Conditioner Drive And Switching Power Supply Design

This article describes the National Semiconductor part of the chip design technology IRMCF341, in particular, discussed the drivers based on the chip driver circuit design and to ensure the reliability of the switching power supply design, and operation of the switching device losses arising from a thermal design discussed.First introduced the current status of the motor-driven, but also for the driver chips used in the paper gives a brief description of IRMCF341 clear the IRMCF341 the main function modules and their relationship. While switching power supply for the paper part of the program were introduced.Then discussed in detail the current sampling circuit IRMCF341 and voltage sampling circuit. Both the accuracy of signal detection circuit between the motor drive of the stability and reliability. To this end sampling circuit design for interference design are summarized. Also given product has been achieved in the design of the chip pin definition and the associated schematic. Also achieved for the drive part of the DC / AC power conversion device PS21869 were described in detail.The third part of the product produced during operation of the heat loss of the need for thermal design methods are summarized, given the thermal design process of product design and reliability evaluation methods.Then, the switching power supply products are discussed. This section details the key chip switching power supply to achieve STR-L472, the chip design to summarize the key points. Switching power supply test is given the test results of the evaluation process. Finally, a summary of this paper, the latter part of product development, breakthrough technologies that need to prospect.