25MPa 160cc 481nm 1700rpm 90kw Hydraulic Servo System for Hydraulic Press Industry

ES/EP
Hydraulic Servo System

The hydraulic servo drive system consists of ES600 series servo drive and EP series servo motor. By combining the capabilities of high-performance general servo platform, it comprehensively enhances servo motion control capabilities. Deeply coupled with the structural characteristics of oil pumps, it significantly reduces hydraulic pressure pulsation. The integrated machine features a duct casing structure, enhancing heat dissipation and increasing mechanical structural strength. With a new electromagnetic design featuring low inertia, the inertia of the frame size 200 is reduced by approximately 10%, meeting high-speed response requirements. By combining software and hardware, vibrations are minimized, achieving ultimate silence. Equipped with CANOPEN communication and coupled with upper computer platform, the entire electrical control solution assists in upgrading hydraulic equipment.

Paired with intelligent hydraulic position closed-loop algorithm, it significantly enhances positioning accuracy, reduces impact during operation, decreases equipment wear, and improves equipment lifespan. It intelligently diagnoses pump and oil circuit faults based on feedback pressure, actual speed, output current, and other information.

 

Product Positioning
ES600 series servo drives cover a power range of 3.7kW to 350kW, while the EP series AC permanent magnet servo motors have a rated power of 3.7kW to 350kW, a rated torque range of 2.2Nm to 20000Nm, and a rated speed range of 10rpm to 15000rpm. The hydraulic servo system is mainly used in industries such as injection molding machines, shoe-making machines, large-scale hydraulic stations, hydraulic presses, film blowing machines, metal balers, bending machines, and die-casting machines.

Servo System Product Features

Complete specifications
The fully self-developed servo systems cover a full power range of 3.7kW to 350kW, meeting the needs of customers under various working conditions.

Specialized segmentation
We can provide customers with customized full-range surface-mounted, embedded, and permanent magnet reluctance high-performance servo systems.

Stable and reliable
Since establishment, we have provided over 1 million sets to the market, and our industry service experience of over 10 years ensures the stable and reliable quality of Epsivo servo products.

Flexible selection
The multifunctional drive supports various types of encoders, including rotary transformers, photoelectric encoders, sine-cosine encoders, and absolute value encoders. Optional high-speed buses such as Varan and EtherCAT enhance the expansion capability of the servo system.

Outstanding performance
With optimized current loop and speed loop control characteristics, it supports high-frequency output of over 1KHz. It uses MODBUS and CANBUS communication, FVC control, with high reliability, fast response, strong real-time performance, and more convenient and user-friendly operation and debugging. It is highly humanized and allows for easy implementation of parallel connection of multiple pumps as well as confluence and diversion control.


Product Advantages

More energy-efficient
High-efficiency servo drives and synchronous servo motors, combined with high volumetric efficiency hydraulic servo pumps, can eliminate energy losses due to overflow at high pressure in the hydraulic system, leading to energy savings of 40% to 80% compared to traditional asynchronous motor hydraulic systems.

More durable
Using a robust rotary transformer as the speed feedback component, it operates stably in environments with heavy metal dust, high temperatures, high air humidity, severe oil contamination, and significant vibration, ensuring stability, reliability, and extended lifespan of the component.

More user-friendly
Servo motors and drives require no maintenance, and signal acquisition from the upper computer is more user-friendly.

More stable
Designed with a large margin for strong protection capability, it significantly reduces the operating oil temperature of the entire machine.

More precise
It adopts the dual closed-loop control mode for more precise pressure and flow control.

Less noise
It reduces noise by more than 10DB compared to similar products.

More stable
Utilizing 32-bit ARM as the core and advanced motion vector core algorithm, it can operate without overcurrent or tripping under any acceleration and deceleration time and impact load conditions.

Higher performance
With real-time motor temperature monitoring, and built-in high-precision, high-response PID application algorithm module, it achieves precise pressure control, leading the 
industry in low-speed pressure holding performance. With a response time of 50ms when the pressure starts at 200bar, it has a pressure overshoot of 5bar, and a pressure fluctuation of 0.5bar. The weak magnetic range is improved by 10% compared to the previous generation, with enhanced response and impact suppression capabilities.

Higher integration
Rotary decoding card with integrated communication bus design.

Built-in braking unit
It is equipped with a built-in braking unit for applications in the hydraulic industry under 160KW.

   

Working Principle
Before the system establishes pressure, the flow is used to control the speed of the servo motor precisely, thus controlling the system flow accurately.
After the system pressure is established, the real-time pressure is rapidly controlled through pressure PID, utilizing the advantages of fast response and precise control of the servo motor to achieve rapid and high-precision pressure control in the system.


Application and solutions in the hydraulic press industry

Traditional hydraulic presses use ordinary asynchronous motors, which are bulky and occupy a lot of space. Moreover, their non-stop 
operation leads to overall high oil temperatures, necessitating a correspondingly large oil tank volume. In contrast, the electro-
hydraulic servo system adopts an intelligent servo energy-saving system, reducing power consumption by 30%-50%. Each machine is 
equipped with an infrared grating, which effectively protects operators. It can achieve pressure control accuracy of up to 1bar and 
position control accuracy of 0.05mm on different types of hydraulic press equipment. The system supports various pressing modes 
(such as sheet stamping, drawing, resistance to drawing, precision stamping), ensuring the machine's repeat positioning accuracy of 
up to ±0.05mm and pressure error within ±1%. The servo intelligent control system operates efficiently, preventing unnecessary work 
and minimizing oil temperature increase. Additionally, the absence of negative pressure within the oil circuit system significantly 
reduces the failure rate, prolonging the lifespan of hydraulic components. The electrical equipment is equipped with automatic fault 
alarms and a one-click reset function. Currently, it serves numerous large oil pressure equipment manufacturers and users worldwide, 
receiving unanimous recognition within the industry.

Q1: Can I have a sample order?
A1: Yes, we welcome sample order to test and verify the quality and performance. Mixed model samples are acceptable too.

Q2: Do you have any MOQ limit?
A2: NO MOQ. Please just send us inquiry.

Q3: What is the lead time?
A3: We have some stock for common models. Common model samples take 1-3 days; bulk orders take 3-10 working days. Uncommon models take 20-30 working days and depends on the actual situation of the production line.

Q4: Do you offer warranty for the products?
A4: Yes, we provide 18 months warranty for the failure or damage under normal use conditions. If the equipment has been used for over 18 months, reasonable repair expenses will be charged.