Electricity: motor control systems – Closed loop speed control system for dc motor with commutator – Field control – or field and armature control – by analog...
Reexamination Certificate
2006-11-07
2006-11-07
Duda, Rina (Department: 2837)
Electricity: motor control systems
Closed loop speed control system for dc motor with commutator
Field control, or field and armature control, by analog...
C388S800000, C388S811000, C388S815000, C388S907500, C388S937000, C318S599000, C318S811000
Reexamination Certificate
active
07133601
ABSTRACT:
Amperage control of a power tool motor is provided by pulse width modulation of current from a power supply. The pulse width modulation may be varied according to the determined motor current and measured power supply voltage. The power supply preferably includes a battery, such a lithium ion or nickel cadmium.
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Jones Julie L.
Phillips Alan
Black & Decker Inc.
Duda Rina
Harness & Dickey & Pierce P.L.C.
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