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Based on rotating transformer phase shifting encoding engineering design

by:HENGXIANG     2020-11-27
Shaft Angle encoder is varied, this article is a kind of based on rotating transformer phase shifter of coarse and fine dual channel coding engineering design, and get a successful application. 1 principle and shows that this scheme adopts the rotating transformer as the mechanical shaft Angle sensor Angle convert its proportional to the phase displacement. First open a door with excitation signal as a counter to count signal, through phase-shifting network is proportional to the mechanical Angle relationship move that number as a closed signal counter. Open signal to counter to start counting, and shut down the signal counter stop counting. When stored in the size of the digital counter, for mechanical Angle into the corresponding relations between digital. 3 can achieve the technical indexes of coarse fine combination of dual channel, coarse, fine = those days. Using 10, of both the coarse and fine counter full range of 6000 bits, fine full scale to 300 bits. In a 360 & 210 = 1024 deg. In the corresponding digital for 1024. Obviously in the counter is a digital corresponding fine figures closely. The corresponding precision digit. 6 close. 4 phase shift network principle of rotating transformer output into 90 & deg; The second phase voltage: us = Asinω tsinθ ,uc=Asinω tcosθ Added to the resistance capacity on the network, to meet certain conditions, they can get with Angle & theta; A linear relationship between the output of the phase. This can be proved from the following formula derived. As shown in figure 2. Visible, in & omega; RC = 1, under the condition of phase shift network output voltage amplitude is a constant, and the Angle & theta; Has nothing to do, and the output voltage phase and Angle & theta; A linear relationship. But the output voltage and phase relative to the phase difference for the excitation voltage phase, that is to make the output voltage phase shift network phase relative to the excitation voltage phase of phase difference is zero, it must make to the resistance capacity of rotating transformer output voltage phase on the network. This when adjust the zero phase shifting encoder system, we must rotate the stator winding of transformer will achieve its output voltage phase and phase shift network excitation voltage phase is the same, even if the two phase difference is zero. Technology zone can be used in high voltage test of the active load is read power electronic device and its characteristics are power electronic device development trend based on multiple SEPIC chopper circuit of ultracapacitors equalizing strategy generating system used in the design process of virtual prototype tutorials, rounding
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