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Electro hydraulic servo pump system

  • Electro-Hydraulic Hybrid Servo Pump System

The advantage of electric-hydraulic hybrid drive system ►


Save energy consumption
■ On-demand oil supply, avoid throttling and overflow
■ Standby almost have no consumption
Save cost
■ Compared with the electric drive system, do not need the expensive machinery
■ Compared with the valve control system, save 75% hydraulic oil
Save noise
■ Use Inner gear pump and four quadrant plunger pump
■ Standby almost have no noise
Save volume
■ Compared with the open hydraulic circuit, save 75% tank volume
■ Compared with other drive methods,easy to allocate to achieve the miniaturization of components
Improve control performance
■ Precisely control torque and speed,precisely control pressure and fl ow
■ Little oil temperature change, to improve
Easy to maintain
■ Compared with the electric drive system, do not need to periodic lubricate the ball screw
■ Compared with servo valve system, reduce the requirement of the hydraulic oil, prolong the life of the components
Electric-hydraulic hybrid servo pump system
■ The closed loop control of position,speed, pressure is realized by controlling the permanent magnet synchronous servo motor to drive the hydraulic pump. The system combines the advantages of hydraulic control and servo control.



High Energy Saving

ESTUN servo pump system realizes speed and pressure double closed loop control by AC servo drive and permanent magnet synchronic servo motor driving internal gear pump. The output fl ow rate is determined by servo motor speed and ration internal gear pump’s output volume. The system pressure is real-time measured by another pressure sensor. Compared with constant rate pump or variable pump, it can obviously reduce the electric power charge, save cooling water and reduce the heat created by wasted power.

High Performance

【High Effectiveness】High quality imported brand internal gear pump is specially designed for injection machine, die-casting machine and relevant electro-hybrid realms applications. High speed permanent synchronization motor is used to increase pump fl ow rate and running speed of whole machine. Low release, low noise and high effectiveness are guaranteed.
【High Dynamic Performance】ESTUN ProNet series AC servo system is applied to offer high overload capacity. No-load system response time is 20ms or faster.
High precision pressure sensor HM18 is adapted to inspect system pressure. Resolver is selected as feedback component of servo motor. The servo pump system's inspection precision to pressure reference and feedback can reach 12 bits, pressure surge is lower than ±0.5bar on low speed running and the inspection precision to resolver can reach 65536 P/R.
【High Precision】The system control cycle can reach 0.1ms, which can match the request of high precision production.

Specialization

ESTUN has concentrated on R&D of AC servo system for many years. ESTUN has owned many AC servo system key technologies.
The power range of servo system for injection machine, die-casting machine and relevant electro-hybrid realms applications is from 8.7kW to 55kW so that it can be used in most applications. The company can also customize and develop for clients to match the special request of different clients.
ALPHA has many years of experience in R&D of hydraulic pressure relevant products, a professional team by many experienced engineers and senior consultants. They can offer total solution according to the request of different clients.

Facilitation

with special PC softwares avaliable,following functions are achieved:

parameter managemeng

Fast and convenient operations to all parameters are acailable,such as editing,transmission,comparison and initialixation.

Monitoring
Real time monitoring of all I/O signals,alarms of the present and history record and system status,etc.

Real time sampling
Real time sampling the curves of pressure and fl ow facilitates the adjustment and analysis.

Adjusting
Fast adjustment of gains is avaliable.
Simple test is available when theres no position or speed reference input.

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