| 摘要 |
PURPOSE:To lock the rotational speed of a motor quickly at specified rotational speed even when the rotational speed of the motor reaches reference speed at any timing. CONSTITUTION:Each reference pulse signal by the period of the number of division mutually having phase difference, in which the periods of the reference pulse signals for a specified period are divided equally into the plural, is generated from a polyphase pulse generator MSPG, each discrete phase frequency comparator PFC1-PFCn compares the phase of a fundamental signal and the phase of a position sensing signal S1 respectively, and outputs corresponding to high acceleration control or high deceleration control are acquired from a motor M in sections, in which the frequency of Si is kept within the sections except the set frequency range of the fundamental signal. Each mutual phase difference signal consisting of time width is output every time the fundamental signal is generated within the set frequency range of the fundamental signal, and each mutual phase difference signal is AND-operated by an AND circuit, and the M is driven on the basis of the result. |
