Multiple Rotation Absolute Sensor
◆Introduction
■When one wishes to detect the rotating position of the output shaft of a servo system, it is often enough to detect the origin (zero degrees) after the output shaft starts turning, then to determine the current position. However, there is much demand for determining the origin (zero degrees) during the stage of installation, then keep the readings constant regardless of operation or stop mode "detection of the absolute position" .
■To meet these applications, Sanyo Denki has long provided the ABS-RII and ABS-Mnseries. In addition, the company has recently developed a new-concept "Multiple Rotation Absolute Sensor," an alternative product made by using a resolver and incorporating some ideas into the gear unit.
■The absolute sensor consists of one resolver that detects the position of a rotor during one rotation and three resolvers whose rotation ratios are varied via gears in order to detect the number of multiple rotations. The signal detection system of the resolvers uses changes in magnetism in the direction of thrust, unlike the radial direction of conventional models. The arrangement of three multiple rotation resolvers on the same plane has achieved a size reduction.
■The multiple rotation absolute sensor needs no battery for memorizing the number of multiple rotations, requires a greatly reduced amount of maintenance, and reduces industrial wastes. The system is compatible with multiple interfaces thanks to its module configuration. It also achieves a resolution as high as 16 bits (65,536 divisions). These features make it probable for the system to find applications such as high speed and multiple-axis control.
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Technical Documentation |
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Please see the document for details |
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English Chinese Chinese and English Japanese |
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November-1999 |
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403 KB |
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