Split-type rotary transformer with digital output

Abstract

The invention belongs to the technical field of rotary transformers, and discloses a split-type rotary transformer with digital output. A decoding circuit is miniaturized and the shape and size of a decoding board are matched and designed according to the structural shape of an output winding of the split-type rotary transformer, and the decoding board is directly integrated on the outgoing side of the output winding of the rotary transformer. The split-type rotary transformer fully maintains original structural characteristics of the rotary transformer through a decoding board integrated modewithout changing the key structural size such as the inner diameter and the outer diameter of the rotary transformer; the decoding board is directly connected with sine and cosine analog output signals of the output winding of the split-type rotary transformer, the analog signals outputted by the split-type rotary transformer are decoded into angle digital signals and the angle digital signals are externally output to users; the decoding board includes an excitation unit, an excitation signal is generated and amplified by power and then used for driving an excitation winding of the split-typerotary transformer, and the condition that an excitation power source is additionally provided to the split-type rotary transformer is not needed.

Description

technical field [0001] The invention belongs to the technical field of rotary transformers, and more specifically relates to a sub-package rotary transformer with digital output. Background technique [0002] A resolver (resolver for short) is a signal element whose output voltage changes with the rotor angle. When the excitation winding is excited by an AC voltage of a certain frequency, the voltage amplitude of the output winding has a sine and cosine function relationship with the rotor angle. It is mainly used for angle measurement in the angular position servo control system. Divided from the structural form, the resolver includes two structures of assembled type and sub-packaged type. The stator and rotor of the assembled resolver are connected as a whole through the casing, end cover, bearing and other components; the stator and rotor of the split resolver are separated, and the user needs to design the installation structure, refer to figure 1 , figure 2 is a str...

AI Technical Summary

Problems solved by technology

But for the sub-package resolver, the stator and rotor are separated. Due to the large size of the existing decoder board, there is no space to install the decoder board on the sub-package resolver; for example, a company's single-channel RDC module, Its size is 37×19mm; and the dual-channel resolver decoder board using two AD2S1210 chips has a size of 80mm×60mm, which is too large to be integrated into the split resolver; there is no decoder board yet A sub-package resolver product that is integrated with a sub-package resolver and directly outputs digital signals

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