|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||388/810 ; 388/904 ; 388/909 ; 388/912|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 2 인용 특허 : 5|
The invention provides a speed controller which detects the period of an AC signal containing information of the rotational speed of a motor and controls the rotational speed based on the detected period value and a reference speed value. More particularly, the speed controller computes the amount of the deviation of the AC signal based on continuously detected period values and the reference speed value, and then stores the computed deviation amount in a memory as a correction value. Using the correction value stored in the memory, the speed controller ...
A speed controller comprising: period detecting means for detecting a period of alternating-current (AC) signal containing information of a rotational speed of a rotating object; memory means for storing the detected period value detected by said period detecting means; calculation means for calculating an error output from said detected period value and a reference speed value; driving means for supplying said rotating object with a driving power based on said error output; and correction-value computing means for computing a correction value from two c...