| 摘要 |
PROBLEM TO BE SOLVED: To provide inverter equipment in which mechanical sound and vibration are reduced using a simple constitution and smooth motor driving is enabled. SOLUTION: This inverter equipment comprises a DC to AC converter part 2 which converts a DC voltage to a pseudo-AC voltage and outputs it to a motor 1, a voltage detecting part 3 which detects an induced voltage of a motor winding, a PWM duty control part 6 which controls PWM duty, an A/D converter part 4 which samples an output of the voltage detecting part 3 for each prescribed region and converts the sampled value into a digital value, a control operation part 5 which decides the induced voltage by the sampling voltage, calculates zero-crossing positions of the induced voltage of the motor 1, and outputs a sampling command, and a sampling time control part 7 which controls the sampling time ΔTs and the number of times n of sampling of the A/D converter part 4. |
