| 摘要 |
PURPOSE:To enable an exciting energizing with a good accuracy by performing an excitation control of a field pole through using three sensors and a start- signalled BCD code plate coaxial with a rotor. CONSTITUTION:A start-signalled BCD code plate 1 is provided coaxially with a rotor. This code plate 1 has windows corresponding to BCD signals comprising three types of 1 signal, 2 signals and 4 signals. These BCD signals are detected by three sensors 4-1, 5-2 and 6-4 and a field pole corresponding to a rotor pole is excitation-controlled by these detecting signals. Respective sensors 4-1, 5-2 and 6-4 are immovably arranged every 120 degrees in an outer shell. |
