Optical type resolver phase shifter
专利汇可以提供Optical type resolver phase shifter专利检索，专利查询，专利分析的服务。并且PURPOSE: To obtain the highly accurate resolver phase shifter, by performing differential amplification, active filter processing, and the like of the incremental shaft encoder signals from two light sources which are turned ON and OFF by reference sine and cosine signals.
CONSTITUTION: The light beams from the light sources LED 2a and 2b are turned ON and OFF by the highly accurate cosine and sine signals cosωt and sinωt from a crystal oscillator, received by a pair of light receiving elements 3a and 3b through the incremental shaft encoder 1 formed by a rotary grating 1a and fixed gratings 1b and 1c, and applied to elements 3a and 3b. The outputs of said elements 3a and 3b without electric spark noises are transformed into the signals, which have no light source fluctuation and secular change, by a differential amplifier Q
1 . The result is processed by an operation amplifier forming an active filter circuit together with a capacitor, a resistor, and the like, and a resolver phase shifting signal sin(ω+θ) is formed, where θ is a phase angle of the resolver shaft. In this way, the optical type resolver phase shifter becomes highly accurate.
COPYRIGHT: (C)1983,JPO&Japio，下面是Optical type resolver phase shifter专利的具体信息内容。
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