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Hydraulic Servo System

High-efficiency servo drives and Permanent Magnet Synchronous Motor, 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.ES600 electro-hydraulic servo driver enables the output of the system to change automatically, quickly, and accurately following the change of the input. Moreover, the output power is greatly amplified, and the electro-hydraulic Servo System integrates the advantages of both electric and hydraulic.
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High-efficiency Servo Drives And Permanent Magnet Synchronous Motor

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.

Application

Injection molding machines, shoe-making machines, large-scale hydraulic stations, hydraulic presses, film blowing machines, metal balers, bending machines, and die-casting machines.


Features

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  Permanent Magnet Synchronous Motor, 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 precise

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


More stable

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


More user-friendly

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


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.


液压伺服系统原理图


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