ANALYSIS AND EVALUATION OF SWITCHING POWER SUPPLIES
Our lifestyle is surrounded by a variety of power electronic products including inverter air conditioners, inverter fluorescent lamps, refrigerators, motors, amplifiers, and UPSs. The power control boards for these products contain microcomputers that gauge the load conditions to allow optimum control. For example, the microcomputers in air conditioners estimates the current load to perform a quiet and precise temperature control by changing the rotary speed of the motor without any restrictions to the motor inverter. The inverter control panel in fluorescent lamps inhibit the flickering with continuous highfrequency lighting.
Switching power supplies are power supplies with in-built power control panels that perform complex (precise and intelligent) and high-speed control for electrical equipment and products. Switching power supplies are embedded in a variety of power electronic products and are applied in many areas as can be seen in Figure 1.
World-class digital oscilloscopes from Yokogawa: The digital oscilloscopes have high-speed sampling and a wide range of bandwidths that can be utilized for design and development of electronic devices. The ScopeCorders have the advantages of both a digital oscilloscope and a multi-channel data recorder.