In the conventional driving technology, the motor drives the mechanical equipment through various mechanical devices such as a screw rod, a gear box, a pulley and a coupling to increase the final driving torque. However, mechanical transmissions usually have gaps that inevitably cause positioning deviations. In addition, mechanical wear can cause energy loss, sometimes large noise, and requires regular maintenance.
Direct drive system
In recent years, the trend of direct drive systems has been clearly seen in the field of electric drives. The direct drive system has no mechanical components such as belts or gearboxes, and it has high precision and high reliability, which greatly improves the performance of the equipment.
This makes device manufacturing and integration easier on the one hand, and the cost of maintenance and use is greatly reduced on the other hand.
The use of a direct drive system eliminates the need for complex mechanical transmission components and simplifies the overall mechanical design, making the entire system very compact.
The advantages of the direct drive system are as follows:
1. Longer life without worn parts such as gears and belts
2. Maintenance of less maintenance components such as screwless rods and gearboxes
3. Higher energy efficiency, no wear and reduce energy loss
4. Faster reaction without coupling, direct connection
5. Higher precision and almost no backlash
6. Design compact without mechanical transmission components
7. Smooth operation without wear and no noise
Equipment manufacturers may often consider the cost of direct drive motors to be higher, but direct drive systems have lower total cost of ownership if considered in the long run (eg, design, use, and maintenance).
Direct drive motor: Direct drive torque motor is evolved from synchronous servo motor. It usually has more pole pairs and higher power density, so it has a large output torque at low speed. It consists mainly of components such as motor housings, windings, permanent magnets, bearings and feedback encoders.
The direct drive linear motor is equivalent to a synchronous servo motor that is cut from the center and is laid flat. The motor stator is composed of permanent magnets, and the rotor is a winding coil connected to the driver.
Direct Drive Encoder: As the core feedback component of a direct drive motor, the choice of encoder plays a crucial role in the performance and structure of the entire direct drive system.
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