| 摘要 |
<P>PROBLEM TO BE SOLVED: To propose a control technique for a synchronous motor capable of setting a command value for an applied-voltage in consideration of a response delay of current. <P>SOLUTION: An applied-voltage electrical angle setting method related to this proposal comprises the steps of: detecting the voltage applied to a synchronous motor M and current thereof; calculating a peak current value Ip on the basis of the detected values and calculating a current applied-voltage phase α; making a target value setting unit 20 calculate a target current phase βtarg on the basis of the peak current value Ip and then calculate a target applied-voltage phase αtarg corresponding to the target current phase; and making a voltage electrical angle command value setting unit 10 calculate a new applied-voltage electrical angle command value θvtarg on the basis of a changing angle Δθv resulting from correcting the difference between the current applied-voltage phase α and the target applied-voltage phase αtarg with a response time constant L/R of the synchronous motor, a rotational speed ω calculated on the basis of the applied-voltage and the current, and the preceding applied-voltage electrical angle command value θvtarg. <P>COPYRIGHT: (C)2013,JPO&INPIT |
