Brushless Resolver Multipole Size 52 Series

Main Parameters (Part 1)

Main Parameters (Part 2)

Pole Pairs in Resolvers

A resolver, being an electrical device that interconverts electrical and mechanical energy, is equipped with coils and magnetic cores. The number of pole pairs is a critical parameter that represents the ratio of the number of poles in the primary and secondary windings of the transformer within the resolver. This number is directly proportional to the transformer's voltage and power transfer capacity. A higher number of pole pairs allows for the use of smaller coils and cores to achieve equivalent power transfer, enhancing efficiency and potentially reducing the physical size of the device.

Influencing Factors

Several elements can affect the number of pole pairs in a resolver:

Core Size and Material: The physical dimensions and material of the core are pivotal. The material must be capable of withstanding the necessary magnetic field strength and heat while boasting a high saturation magnetic induction intensity and low permeability to ensure optimal performance.

Coil Length and Cross-Sectional Area: The length and cross-sectional area of the coil are determining factors. A longer coil, at a given cross-sectional area, can have more turns, leading to a higher number of pole pairs. Additionally, the coil's cross-sectional area must be adequate to handle continuous operation with minimal resistance loss.

Application and Implications

The choice of pole pairs is not arbitrary. It directly affects the transformer's efficiency and performance. An inappropriate number of pole pairs—either too high or too low—can adversely impact power transfer and voltage stability. Therefore, during the design phase, it is essential to calculate and fine-tune the number of pole pairs based on specific operational requirements. This tailored approach ensures that the resolver operates at its peak, providing the desired performance and power transfer capabilities.