AC-DC CONVERSION APPARATUS, MOTOR DRIVE DEVICE HAVING THE SAME, AND AIR CONDITIONER, REFRIGERATOR, HEAT PUMP WATER HEATER, WASHING MACHINE, AND VACUUM CLEANER THAT ARE EQUIPPED WITH THE MOTOR DRIVE DEVICE

摘要

PPROBLEM TO BE SOLVED: To provide an AC-DC conversion apparatus capable of opening and closing a switch means at a preset instruction voltage phase of an AC power supply even if a clock frequency of a microcomputer shifts, to provide a motor drive device having the AC-DC conversion apparatus, and to provide an air conditioner, refrigerator, heat pump water heater, washing machine, and vacuum cleaner, which are equipped with the motor drive device. PSOLUTION: When a time measuring means 11 detects a falling edge of a power supply zero-cross signal, the time measuring means 11 stores an inter-edge time period measured before the point of edge detection in a memory means 12. PCOPYRIGHT: (C)2011,JPO&INPIT