Multi-polar resolver

Abstract

The invention discloses a multi-polar resolver, comprising a rotor and a stator and further comprising an exciting winding, a sinusoidal winding and a cosine winding which wind around the stator; wherein the outer circle surface of the stator is uniformly provided with P wave peaks and P wave troughs; the inner circle surface of the stator is provided with teeth and slots at regular intervals; each tooth is uniformly wound with the exciting windings at the first layer which are serially connected in a positive and negative alternation manner; the sinusoidal windings at the second layer are wound above the exciting windings at the first layer; the cosine windings at the third layer are wound above the sinusoidal windings at the second layer; and moreover, half of the sinusoidal windings at the second layer interchange the layer with half of the cosine windings at the third layer; constant voltage sinusoidal AC current is applied to the exciting wind, the electromotive forces output by the sinusoidal windings and the cosine windings respectively make a P-time sine and cosine change along with the rotor rotation angle, thus the output winding has the function of a two-phase multi-polar resolver. The multi-polar resolver is simple in structure and high in production mechanization degree, and the production cost of the multi-polar resolver is greatly lowered.

Description

technical field [0001] The invention relates to a rotary transformer, in particular to a multi-pole rotary transformer. Background technique [0002] The traditional rotary transformer used for angle measurement has its excitation winding and output winding set on the rotor and stator respectively. It is a brushed (contact) structure. To achieve brushless, a toroidal coupling transformer ( Referred to as "ring change"), in this way, the structure of the resolver is complicated; and most of the pole pairs of this brushless resolver are dominated by a pair of poles. For multi-pole rotary transformers, it is extremely difficult to design and manufacture, and it is almost impossible. Another existing "vernier type resolver", the output winding of the excitation winding is on the stator, which realizes brushless, but the number of pole pairs P of this type of vernier type resolver is very large, and the minimum pole pairs are mostly 16 pairs. It is very difficult to manufacture...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the existing rotary transformer used for angle measurement is complex in structure and not suitable for multi-pole angle measurement where the number of pole pairs is 2-12 pairs of poles, the present invention provides a multi-pole rotary transformer with simple structure, which is used for Multi-pole (2-12 pairs of poles) angle measurement or multi-pole angle position sensor

Images