发明名称 |
Improvements in or relating to image display systems |
摘要 |
A digital motor controller (17) for controlling both the phase and speed of a brushless DC motor (16). An error detection unit (21) detects a speed error or a phase error. An error logic unit (22) uses the error to determine a speed control value, that is proportional to represents an average motor input voltage that varies from the current input voltage by an amount determined by the error. A pulse width modulation unit (23) receives the speed control value and uses it to determine the duty cycle for the motor drive signals. A commutation unit (24) modulates the appropriate drive signal, and a drive stage (27) delivers the drive signals to the motor (16). <IMAGE> |
申请公布号 |
EP0712253(A3) |
申请公布日期 |
1997.10.22 |
申请号 |
EP19950117914 |
申请日期 |
1995.11.14 |
申请人 |
TEXAS INSTRUMENTS INCORPORATED |
发明人 |
CONNER, JAMES L.;EGAN, JOSEPH G.;BREITHAUPT, WILLIAM R. |
分类号 |
H02P6/06;H04N9/30 |
主分类号 |
H02P6/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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