Industry Insights: Understanding Hybrid Linear Motion

[Erkan Teskancan]

Kyntronics aims to develop hybrid motion control by combining servo control with hydraulic actuators. To better understand this technology, the engineering team delved into the details with several questions.

While motion control is a complex field, it remains one of the most common applications of control systems worldwide. Motion control involves creating precise motion profiles that continuously determine position, velocity, and force.

Industrial motion is typically provided by hydraulic or electric current. However, the hybrid linear actuator system offered by Kyntronics introduces a new approach by combining both electric and hydraulic features. We spoke with Carl Richter, Vice President and General Manager of Kyntronics, about the details and applications of this technology.

### How Hybrid Linear Actuators Work

Hybrid linear actuators combine the power and durability of hydraulics with the precision and control of electric actuators. A compact, fluid-based cylinder (similar to a hydraulic cylinder) is integrated with a servo motor and a gear pump to provide linear motion. A standard PID control system is implemented.

### Operation and Advantages

Hybrid actuators provide programmable positioning, speed control, and load monitoring, making them ideal for automation and Industry 4.0 applications. These systems offer advantages such as energy efficiency, a sealed design that requires no external reservoir, filter, or hoses, and resistance to shocks and side loads.

While traditional hydraulic systems use a central power unit that operates continuously at high speed and pressure, hybrid systems only consume energy when needed, thereby saving energy and reducing the risk of leaks.

### Technical Specifications

• Integrated design of compact fluid-based cylinder and servo motor
• Standard PID control compatibility
• Energy efficiency: Power is only used on demand
• Sealed construction: Eliminates the need for an external reservoir, filter, and hoses
• Shock and side load resistant design
• Programmable position, speed, and force control
• Precise force control with a simple pressure sensor
• Wide range of mounting options and configuration flexibility
• Durable design: Long service life and easy part replacement
• High IP protection rating and dynamic protection features

### Control System Integration

Hybrid actuators mostly work with standard servo motors and drives and are easily integrated into modern automation systems. In addition to AC servo motors, different motor types such as DC servo motors and induction motors can also be supported.

### Areas of Use

Hybrid actuators are used in a wide range of industries requiring precise, reliable linear motion, such as metal forming, bending, assembly presses, drilling, punching, material handling, and testing. Sectors such as automotive, aerospace, woodworking, security and defense, and plastics and metal manufacturing are key application areas.

### Maintenance and Troubleshooting

Hybrid actuators require less maintenance compared to traditional systems. The hydraulic fluid is sealed and maintenance-free, eliminating the need for routine lubrication or fluid service. This reduces operating costs and downtime.

Hybrid linear motion technology continues to offer innovations in efficiency, power, and ease of use by combining the advantages of electric and hydraulic systems. Kyntronics' expertise makes significant contributions to the industry in this field.