Adhesive for Resolver Terminals? SIPC 1822 Silicone Protection Solution
ELAPLUS SIPC 1822 one-component silicone adhesive sealant can be used for partial encapsulation protection of resolver terminals and lead connection zones. It is formulated to meet requirements for electrical insulation, moisture-proof sealing, lead retention and mechanical stress buffering. For resolvers used in servo motors, robot joint motors and new energy vehicle motors, the dispensing range, bond thickness and curing conditions shall be properly controlled to prevent adhesive creep into the air gap between stator and rotor or interference with precision assembly. A resolver is a critical component of motor position feedback systems, generally consisting of stator, rotor, windings, insulation bobbin and terminal connections. Stator winding leads are electrically joined to external circuits by soldering or other methods. The terminal region must maintain stable electrical performance under motor vibration, temperature cycling and long-duration operation. For resolver terminals confined in tight spaces, the adhesive shall protect joints while avoiding excessive local stiffness. Partial fixation and encapsulation with flexible silicone is a viable candidate protection approach. 1. Why Do Resolver Terminals Require Dispensed Adhesive Protection? Resolver terminals are usually connected to fine winding leads. Some assemblies also include metal solder tabs, plastic bobbins and harness junctions. During continuous motor operation, mechanical vibration and harness pull loads transfer to the root of terminals, subjecting solder joints to cyclic stress. In addition, ambient moisture and contaminants may compromise insulation around metal terminals and long-term joint stability. For eligible connection structures, silicone forms a local protective layer that reduces direct exposure of joints to environmental factors. Adhesive dispensing cannot replace qualified soldering or mechanical terminal retention. Improper lead routing, defective solder joints or inadequate mechanical fixation cannot be fundamentally resolved simply by applying more adhesive. 2. How to Diagnose Common Defects after Dispensing on Resolver Terminals Common failures include loose lead roots, incomplete terminal coverage, edge…
