Drive system for rotary heat exchangers Know-howEmotron EMX-R and commitment are always included Service offer of CG Drives & Automation Efficient and reliable • Robust motor without gear or fan. • Integrated electronic rotation sensor – eliminates the need for mechanical sensors. • High efficiency - No gearbox losses. • A wide speed range for maximum usage of the high efficiency in the exchanger wheel. • Easy handling since no adjustments or settings are required. • Selectable direction of rotation. • Integrated motor cable. • Extensive protection against short circuit, overloading etc. • Holding torque – prevents involuntary heat transference. The EMX-R drive system is a range of speed controlled drive systems for rotary heat exchangers. A system consists of a motor and a corresponding electronic controller. Uniquely, EMX-R is equipped with an integrated electronic rotation sensor, RotoSens™, which eliminates the need for a mechanical sensor. The system can also easily handle a conventional mechanical rotation sensor if so desired. The EMX-R drive systems are based on the switched reluctance (SR) motor technology. The SR technology allows the EMX-R motor to drive heat exchanger wheels with diameters up to 3.5 m without any need for a gearbox. The result is fewer mechanical wear parts and therefore a lower Life Cycle Cost (LCC). Also the efficiency is substantially increased while all gear losses are eliminated. The motor can run in both directions and has a permanently attached motor cable for easier installation. To further support an easy installation, no adjustments and settings are required to get the drive system into operation. For maximum performance and efficiency in a rotary heat exchanger, low speed as well as high speed is required. The EMX-R system therefore offers full control over a wide speed range. To prevent involuntary heat transference, holding torque is activated in the motor to hold a rotor still. The drive system learns which rotor requires holding torque. The EMX-R drive is available in three different sizes; 15, 25 and 35. The following table illustrates the maximum wheel diameters in decimeter with a maximum wheel speed of 10 to 12 rpm. The controller is available in two versions; S (Standard functionality) and E (Extended functionality). Model E has an extra circuit board for increased functionality.

Technical data Motor Max diameter of exchanger wheel with max. 10-12 rpm1 Freely selectable. Motor cable (Integrated) Operation status, alarm Wheel speed, Operation operation status, status, alarm alarm Wheel speed, Operation status, operation status, alarm alarm Wheel speed, operation status, alarm Analogue output proportional to speed Alarm relay Supply voltage 1) Higher wheel speed or tight air sealings could result in a need for a larger drive system. 2) Two NTC resistors ( 2000 Ohm), one in the channel for incoming air and one in the channel for outgoing air, could be directly connected....