A frequency converter unit includes a unit body, input bus bar means and output bus bar means. The two devices are electrically coupled so that their capacitive and inductive reactances approach a balance to provide an essentially resistive combined input at a selected frequency. The aversion device may include a detector and a output device, wherein the detector is configured to detect a parameter indicative of the user engaging in the habit or undesirable activity. The player wins the game when the object or object parts disappear from the display. With this arrangement, there can be obtained a rotary electric machine capable of reducing operation noise. The article can be scanned, as a security check.