CONTROLLER AND STARTING METHOD OF SYNCHRONOUS MOTOR AND METHOD AND EQUIPMENT FOR DETECTING ABNORMALITY OF SYNCHRONOUS MOTOR

Title:

CONTROLLER AND STARTING METHOD OF SYNCHRONOUS MOTOR AND METHOD AND EQUIPMENT FOR DETECTING ABNORMALITY OF SYNCHRONOUS MOTOR

Document Type and Number:

Japanese Patent JP3951195

Kind Code:

B2

Abstract:

PROBLEM TO BE SOLVED: To drive a synchronous motor accurately and optimally, by storing optimum initial-phase correction quantity at a time when a moving section is placed at the position of a limit switch detecting to reach a movable limit of the moving section of the synchronous motor, and converging initial-phase correction quantity to the optimum value.
SOLUTION: A CPU 1 outputs a current command through a D/A converter 2, and a power amplifier 3 flows a current proportional to the current command through a synchronous type linear motor 6. A counter 5 counts positional pulses, stoppers 81, 82 prevent movement more than a specified stroke of a moving section 7 driven by the motor 6, and limit sensors 91, 92 detect presence of the moving section at the end of the stroke. An optimum initial-phase correction value at a time when the moving section 7 is placed at positive-side and negative-side stroke ends is measured beforehand and stored in a nonvolatile memory 4, and positional control algorithm, the vector control of a motor current and initial-phase correction quantity detecting processing are executed by the CPU 1.

Inventors:

Akihiro Furuya
Yukinori Takada

Application Number:

JP35078296A

Publication Date:

August 01, 2007

Filing Date:

December 27, 1996

Export Citation:

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