Servo motor with a built-in drive circuit
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United States of America Patent
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May 9, 2006
Issued Date -
N/A
app pub date -
Nov 10, 2003
filing date -
May 7, 2003
priority date (Note) -
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status (Latency Note)
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Abstract
A servo motor with a built-in drive circuit is provided in which, when power is off, positional data including multiple-rotation counting values is stored in a nonvolatile memory to thereby eliminate battery back-up, and in which the CPU of a drive control circuit portion is in charge of the multiple-rotation counting itself to thereby eliminate the circuit for multiple-rotation counting. Due to a reduction in the number of lines involved and an elimination of battery back-up, a reduction in size is achieved. The servo motor with a built-in drive circuit includes an absolute encoder for detecting rotation of a servo motor portion and an electromagnetic mechanical brake, in which, when the power is off, the positional data at that time is stored in a nonvolatile memory.
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