Electricity: motor control systems – Closed loop speed control system for dc motor with commutator – Armature control by digital or combined analog and digital...
Patent
1998-02-05
1999-05-04
Masih, Karen
Electricity: motor control systems
Closed loop speed control system for dc motor with commutator
Armature control by digital or combined analog and digital...
318254, 318138, 318439, 318811, H02P 517
Patent
active
059012684
ABSTRACT:
In order to prevent the performance of a motor from deteriorating due to a change in which the rotation rate of its rotor is to be increased suddenly, in a brushless motor in which a drive pulse whose pulse width is modulated in correspondence to a rotation rate setting signal input from the outside is formed and switching control is performed on the current supplied to the exciting coils by using output signals from the Hall elements that detect the position of the rotor and the drive pulse, the pulse width of the drive pulse is changed gradually and greatly until it reaches the pulse width that corresponds to the rotation rate setting signal when the upward change in the rotation rate of the rotor is to be large.
REFERENCES:
patent: 4494055 (1985-01-01), Bitting et al.
patent: 5602448 (1997-02-01), Yaguchi
Ando Kouji
Horiuchi Kzuyoshi
Ohi Shinichi
Ohsawa Hiroshi
Masih Karen
Zexel Corporation
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