Electrohydraulic Servo Drive

Shenzhen Veichi Electric Co., Ltd. is a high-tech enterprise that is professionally engaged in the development, manufacturing and marketing of industrial automation control products, and committed to becoming a global leading provider of industrial automation control products and system solutions. The company owns powerful R&D team, relatively perfect production system, independent intellectual property and manufacturing bases in Shenzhen and Suzhou. To improve our R&D strength, we keep on introducing advanced overseas technology and broadening our partnerships with first-class universities and...

Product and Applications Electro-hydraulic servo system combined both electrical and hydraulic characteristics can accurately follow the command changes to adjust the output. With high precision, fast response, big output power, flexible signal processing, easy to control, etc., it is widely used in various industries.

Features: 1. Built-in brake unit. 2. Built-in CAN communication, RS485 communication function. 3. Strong overload capacity: 150% rated current 60s, 180% rated current 5s. 4. Various protection functions such as phase loss, short circuit, overheating detection and etc. 5. Air cooling, liquid cooling way, suitable for different environments. 6. High-performance servo control: vector control + field weakening control + PID control. 7. Support 0-10V DC / 4-20mA direct analog signal input. 8. Fast and safe isolated terminal wiring. 9. Support 0-1000m analog signal input (with our special conversion...

Single and Double Pump System Single pump system actuator 1 pressure sensor U controller reactance filter servo driver servo motor braking resistor Double pump system actuator 1 pressure sensor P1 pump: high pressure small displacement P2 pump: low pressure large displacement reactance filter servo drive servo motor braking resistor

Flow-Converging System and Flow-Dividing System Multi-pump flow-converging system CAN bus pressure instruction flow instruction main drive slave drive slave drive pressure feedback oil inlet port pump#1 Multi-pump flow-converging system and flow-dividing system CAN bus main drive slave drive slave drive In the multi-pump flow-converging system, the salve machine can be switched to separate system via the electromagnetic valve in order to achieve switching control between flow-converging mode and flow-dividing mode.

Wiring Diagram of Servo Drive external braking resistor AC power input breaker contactor input reactor Electro-hydraulic servo drive Shielded cable or armored cable (ground near server terminal) shielded net layer (twisted shielded cable) rotary transformer signal input common terminal pump start-stop (enable) motor temperature switch signal motor temperature analog signal reverse run forward jog reverse jog Db9 female, rotating transformer signal interface, optional fault reset reserved terminal input common terminal Ferrite ring circles 2 shielded times in the cable same direction. Db9 socket...

Main Circuit Terminal Wiring Diagram and Device Selection Main circuit wiring diagram braking resistor breaker contactor input reactor output reactor Grounding resistance is less than 10 ohms braking resistor DCAC power input output reactor input reactor Shielded cable or armored cable (ground near the driver) brake unit Shielded cable or armored cable (ground near the driver) Grounding resistance is less than 10 ohms S D650 series servo drive main circuit wiring diagram Note: 1. Fuse, DC reactor, brake unit, braking resistor, input reactor, input filter, output reactor are accessories. 2. The...

Main circuit terminal arrangement and definition 7.5 - 15kW main circuit terminal arrangement order 18.5 - 30kW main circuit terminal arrangement order 37 - 110kW main circuit terminal arrangement order Terminal name Terminal function definition DC power supply terminal DC power output, (-) is the DC bus negative, (+) is the DC bus positive, used for connecting external braking unit or common DC bus. Brake resistor terminal Used for connecting external braking resistor, to achieve rapid shutdown. Used for connecting external DC reactor Input terminal of driver Used for connecting three-phase...

Mounting Dimensions S D 650 air-cooled series installation size (see table for the remaining size) Mounting aperture Servo controller model Mounting aperture

S D 650 liquid cooling series installation size (see table for the remaining size) Driver model Mounting aperture

Mounting hole of SD650 series ser vo driver 14-φ8 18.5kW -30kW installation mounting hole 37kW -55kW installation mounting hole 7.5kW -15kW installation mounting hole 75kW -110kW installation mounting hole

Technical Parameters and Installation Dimensions of Motor S18F series installation size (see table for the remaining sizes) Motor model Torque Rated Back EMF Resistance Inductance Moment factor frequency of inertia （V/rpm） （Ω） （Mh）

S25F series installation size (see table for the remaining sizes) Torque Rated Back EMF Resistance Inductance Moment factor frequency of inertia （V/rpm） （Ω） （Mh） （kg·m²） （Hz） （N·m/A） Motor model

S18W series installation size Torque Back EMF Rated Rated Resistance Inductance Moment of inertia speed frequency factor （V/rpm） （Ω） （Mh） （kg·m²） （Hz） （N·m/A） （rpm） Motor model

S25W series installation size Torque Rated Rated Back EMF Resistance Inductance Moment of inertia speed frequency factor （V/rpm） （Ω） （Mh） （kg·m²） （rpm） （Hz） （N·m/A） Motor model

Ser vo System Energy Saving Principle General system oil circuit schematic Ser vo system oil circuit schematic Energy loss graph P Pb Throttle loss （△P*Q1） P1 Overflow loss （Pb*△Q） Effective power （P1*Q1）

Ser vo System Selection Required knowledge of selection – pump formula The original pump displacement (q) × the original motor speed (n) = system flow (Q) = servo pump displacement (q) × servo pump maximum speed (n) before selection after selection Under normal circumstances, select the pump of the following displacement and the speed is generally recommended not higher than 2000rpm: 31 cc; 40 cc; 50 cc; 63 cc; 80 cc; 125 cc; 160cc. Servo pump maximum speed ≤ Motor rated speed × 130% The servo motor maintains a constant torque at 130% of rated speed. When motor speed reaches 140% of the rated...