ROJ Mechatronics Demeter Motor Drive motors for precision agriculture
ROJ Mechatronics, committed to the development and dissemination of precision agriculture, has created the DMD line of motors.
What is a DMD?
The abbreviation DMD is the acronym for Demeter Motor Drive and indicates the actuator of an electronic system in an agricultural environment.
The term derives from the union of the words "Demeter", the Greek goddess of agriculture, and "Motor Drive", in fact, the motor drive is integrated into the gearbox (on the brushless motor is a reducer mounted in order to increase the output torque).
In a nutshell, therefore, a DMD is a component that receives commands directly from the ECU installed on the tractor and converts them into movement.
What are the DMD that ROJ Agri-Motion offers to its customers?
ROJ Agri-Motion currently offers two series of Demeter Motor Drives on the market: the DMD-0 and DMD-2 motors.
The DMD-O motor is a component consisting of a “brushless” motor, with an integrated orthogonal gearbox and electronic drive.
The DMD-2 motor is a component consisting of a “brushless” motor, with an integrated planetary gearbox and electronic drive.
In both cases, the motor drive can be used to replace the mechanical or hydraulic transmission in agricultural applications (e.g. variable rate applications).
What are the possible applications and characteristics of ROJ Agri-Motion Demeter Motor Drive?
Some examples of possible applications are:
- Actuation of seeding element in pneumatic precision drill machines;
- Actuation of seed distributor in air-drills or small grain planters;
- Actuation of fertilizer and micro granular spreaders in agricultural machines;
- Salt, fertilizer, grain spreaders.
Here below some features of ROJ Demeter Motor Drives, for more information please see the dedicated technical data sheets:
https://en.doc.roj.com/components-dmd-0.c160
https://en.doc.roj.com/components-dmd-2.c165
DMD-0 |
DMD-2 |
Designed for 12V agricultural equipment |
Designed for 12V agricultural equipment |
8,75Nm, 100 rpm @ output shaft |
4,5 Nm, 80 rpm @ output shaft |
Rugged anti-corrosion aluminum housing |
Custom shaft versions upon request |
Slim design (85mm total width to fit the application requirements) |
|
Integrated brushless motor drive with CANOpen communication (speed and position control) |
Integrated brushless motor drive with CANOpen communication (speed and position control) |
Integrated low power DC-motor drive to control small actuator (eg. automatic seed singulator) |
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2 application digital inputs (e.g. seed sensor or hopper level sensor) |
2 application digital inputs (e.g. seed sensor or hopper level sensor) |
The look to the future of ROJ Agri-Motion: the DMD-2 48V
In 2017, ROJ launched the DMD-2 motor, a unit optimised in terms of performance and cost for driving seed metering units on high row-count seed drills. Increasing the number of seeding rows and also the distance of the utilities from the battery, the 12V power supply has some limitations. Therefore, ROJ decided to develop a new motor that uses the 48V power supply that can be found in the latest generation of tractors.
Specifically, the DMD-2 48V is a brushless motor with an electronically controlled planetary gearbox, designed for 48V agricultural equipment, with an application focus on seed drills with a high number of rows.
Here are the main advantages compared to 12V:
- For the same motor power, the 48V system uses 1/4 of the current, reducing problems related to the voltage drop.
- For the same current consumption, several motors can be connected to the 48V system, increasing the total power installed on the machine.
For more information or to find your nearest dealer visit https://www.agri-motion.com/en/contacts