| 摘要 |
PROBLEM TO BE SOLVED: To make it possible to reduce the microcomputer load in an inverter device and enhance software construction, by providing the operation part of a converter section which is installed in a microcomputer and synchronizes the control period of the converter section with the period of triangular waves. SOLUTION: A converter section and a fan motor section are controlled by a microcomputer with periods marked with '22' and '23' in the figure, and an inverter control section communicates with the microcomputer and drives a compressor. The fan motor section outputs a pulse voltage 24 equivalent to sine wave 21 from the operation part of the fan motor section with the period of a carrier 20 generated at a carrier generating section as sine wave generating section in the microcomputer, and exercises control. The converter section detects a voltage value and a current value input from an alternating- current power supply at a period equivalent to two cycles of the carrier 20, that is, at intervals equal to an integer multiple of the carrier 20, and performs computation at the operation part of the converter section and further exercises control. As a result, microcomputer load can be reduced and simple programming can be performed by synchronizing the control period of the converter section with the period of triangular waves. |
