Electricity: motive power systems – Limitation of motor load – current – torque or force
Reexamination Certificate
2005-09-13
2005-09-13
Leykin, Rita (Department: 2837)
Electricity: motive power systems
Limitation of motor load, current, torque or force
C318S254100, C318S432000, C318S434000, C318S635000, C318S678000, C318S681000, C363S095000, C363S097000
Reexamination Certificate
active
06943514
ABSTRACT:
For applying a driving current to a motor, an H-bridge circuit is constructed by a first and a second switching unit and a first and a second linear unit. An error amplifier generates an error signal representative of a difference between the driving current detected by a current detecting circuit and a command current signal. A state control circuit synchronously controls the first and second switching units and a feedback circuit. Through the feedback circuit, the error signal is selectively applied to the first or second linear unit such that one is operated in a linear mode and the other is operated in a nonconductive mode, thereby controlling the driving current to become proportional to the command current signal. The state control circuit further controls a brake circuit for transforming the error signal into a brake signal to operate the first and second linear units simultaneously in a conductive mode.
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Chen Chi-Yang
Chen Li-Cheng
Aimtron Technology Corp.
Hsu Winston
Leykin Rita
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