COX Torque-Limiting Permanent Magnet Coupling COX — JIAOHUA

COXCOX Limited Moment Type Permanent Magnet Coupler

COX Torque-Limiting Permanent Magnet Coupling JIAOHUA

COX is a limited-moment permanent magnet coupler (developed by Jiaohua in 2012): torque is transmitted across an air gap between a copper conductor rotor on the motor shaft and a permanent magnet rotor on the reducer side, with no mechanical connection. At start-up the gap opens from 5 to 8 mm so the motor accelerates almost unloaded; if the load jams, the gap opens to 35 mm and torque transmission stops, and the coupler returns to operation by itself once the cause is removed. Slip 1–4 %, no oil, bearings or power supply. 16 sizes, 11–710 kW at 1,500 rpm.

Specifications

Sizes: 16: COX-270 … COX-750
Power at 1,500 / 1,000 / 750 rpm: 11–710 / 15–450 / 15–355 kW
Slip (motor at rated speed): 1–4 %
Air gap: 5 mm as installed, up to 8 mm at start-up
Torque limiting: on overload the gap opens to 35 mm and torque transmission stops; automatic reset
Permissible misalignment: offset up to 5 mm, angular up to 2°
Outside diameter / weight: 340–860 mm / 65–365 kg
Ambient temperature: down to −45 °C