Pacific Scientific SCE900 series single axis brushless servo drive

Pacific Scientific SCE900 series single axis brushless servo drive

Product Overview

The SCE900 series is a single axis, rotary feedback, brushless servo drive produced by Pacific Scientific (Danaher Motion). It uses fully digital DSP control and patented rotary digital conversion technology to provide high dynamic, low torque ripple control and is compatible with three-phase permanent magnet brushless motors.

Control architecture: Three ring fully digital system with current/speed/position

Power device: IGBT+20kHz PWM

Feedback method: Rotary Resolver (standard)

Expansion method: detachable function card (communication/positioning)

Certification: CE mark, compliant with low voltage and EMC directives

Model and power specifications

SCE900 is divided into four power levels: SCE902/903/904/905, with the following power supply and output capabilities:

Model Peak Current (A) Continuous Current (A) Power Supply Peak Power (kW)

SCE902 7.5 3.75 90-264VAC single-phase/three-phase 2.2

SCE903 10.6 5.3 180-528VAC three-phase 5

SCE904 21.2 10.6 180-528VAC three-phase 12

SCE905 31.8 15.9 180-528VAC three-phase 18

Core performance parameters

Rotary feedback

Resolution: 24 bits/rev (0.0013 arc minutes)

Excitation frequency: 6510.42Hz

Absolute accuracy: ± 5.3 arc minutes

Control bandwidth

Current loop: 1.5kHz

Speed loop:>400Hz

Position ring:>100Hz

Command input

Analog quantity: ± 13.5V differential

Pulse: 800kHz maximum

Optional: RS232/485, SERCOS

Simulated encoder output

Resolution: 128-16384PPR (16 levels)

Format: ABZ Differential

Environmental indicators

Working temperature: 0-50 ℃ (air-cooled)/0-25 ℃ (naturally cooled)

Storage temperature: -40-70 ℃

Altitude: ≤ 2000m

Interface definition

SCE900 adopts foolproof plug-in terminals, and the key interfaces are as follows:

J1: Three phase main power supply (L1/L2/L3+PE)

J6: Control power supply (single-phase 90-264VAC)

J2: Motor U/V/W+chassis grounding

J3: Rotary S1/S2/S3/S4+Excitation R1/R2+Motor PTC Temperature Measurement

J4: Analog command, pulse command, enable, limit, fault, analog encoder output

J5: Regenerative braking resistor interface

Optional function card

The drive supports hot swappable function cards, and after configuration, the card can be unplugged to retain the following parameters:

OCE900-001: Blank cover plate

OCE930: RS232/485 communication

OCE940: ERCOS Fiber Optic Bus

OCE950: Single axis programmable positioning (supports Modbus/DF-1)

Protection and fault diagnosis

The driver has multiple layers of hardware and software protection, and displays fault codes through 7-segment LED:

Hardware protection

Motor phase to phase/ground short circuit

Bus overvoltage/undervoltage

Driver overheating, motor PTC overheating

I ² t overload current limiting, auxiliary power supply * *+5V undervoltage**

software failure

Overspeed and tracking error exceeding the tolerance

Parameter verification error, DSP crash

Abnormal communication of rotary transformer

Clearing method

General fault: Fault reset input

Serious malfunction: Power on again

Installation and heat dissipation specifications

Installation method: Vertical panel installation, back grounded

Cooling space: Leave 100mm up and down, 40mm left and right (natural cooling)

cooling method

Natural air cooling: 25 ℃ at full load

Forced air cooling: 50 ℃ at full load

Grounding requirement: Double PE grounding, leakage current of about 15mA

Cable requirements: motor/rotary transformer/signal cable double shielding, 360 ° ring grounding

Debugging software

Comes with 930WIN.exe Windows software, supporting:

Automatic recognition of drivers

Automatic digital tuning

Parameter reading and writing, oscilloscope monitoring

Fault log reading, program download