In modern induction and permanent magnet synchronous motors (PMSM), the stator end-turn bundle represents one of the most mechanically vulnerable segments of the electromagnetic circuit. During high-inrush start sequences, inverter switching frequencies (PWM transients), and rapid directional reversals, electromagnetic Lorentz forces exert high mechanical stress across unconstrained copper end-turns. The automatic double side stator coil lacing machine solves this failure vector by tensioning, bundling, and locking both the drive-end (DE) and non-drive-end (NDE) coil extensions simultaneously.
Unlike single-sided manual or semi-automated tying methods that produce asymmetrical wire compression, our servo-driven dual-needle synchronization ensures exact, balanced geometric form factors. By lacing slot-by-slot, interval-slot, or custom programmable segment loops, the machine tightly binds the copper coils against phase-insulation barriers. This uniform compaction maximizes heat transfer into the laminated stator core, eliminates intra-slot air voids, and prevents high-frequency vibration that degrades enamel coating—effectively eliminating early turn-to-turn dielectric breakdown.
Multi-Axis Servo Synchronization
Utilizes dual independent servo drives coordinated through high-speed PLC bus systems. Both top and bottom needle mechanisms plunge and loop in perfect tandem, eliminating lacing needle deflection and providing precision cycle times of 0.5 to 0.7 seconds per stitch.
Controlled End-Turn Envelope
Uniform double-sided lacing controls the coil projection profile, guaranteeing that coil extensions clear motor end-shields, bearing brackets, and cast-iron frame walls without dangerous manual reforming or hammer adjustments on the line.
Dynamic Tension Feedback
Equipped with closed-loop lacing cord tensioning that automatically compensates for thread friction and reel unwinding variations. This prevents cord snapped lines or loose end-bindings, operating flawlessly with nylon, polyester, and Nomex lacing tapes.