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|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||123/399 ; 318/685 ; 318/696|
|우선권정보||JP-0096420 (1994-05-10); JP-0096421 (1994-05-10)|
|발명자 / 주소||
|출원인 / 주소||
|인용정보||피인용 횟수 : 8 인용 특허 : 0|
An air flow rate control apparatus for an internal combustion engine includes a stepping motor. The stepping motor has a plurality of coils and a rotor which is rotated by energizing the coils. A throttle valve connected to the rotor moves together with the rotor, and controls a rate of air flow drawn into the internal combustion engine. A control device is operative for feeding command currents of first and second command current values to first and second coils among the plurality of the coils respectively, and for controlling a degree of opening of th...
A stepping motor control apparatus comprising: a stepping motor comprising: a plurality of coils, and a rotor, said rotor being rotated by currents fed to said plurality of coils, respective currents of differing magnitudes being simultaneously fed to two of said plurality of coils located at opposite sides of an arbitrary desired held position of said rotor, to thereby hold said rotor at said arbitrary desired held position between said two of said plurality of coils in accordance with respective values of said respective currents; and output means for ...