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Elmo SSA Series User Manual

Elmo SSA Series
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SSA - Rev 6/98
Rev 6/98
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Elmo SSA Series Specifications

General IconGeneral
TypeSolid State Amplifier
CoolingConvection
SeriesSSA
Total Harmonic Distortion<0.1%
Damping Factor>200

Summary

Safety Instructions

Safety Introduction and Context

Provides general information, cautions, and warnings for safe operation and maintenance.

Critical Safety Warnings

Highlights risks of live parts, disconnection requirements, and protective earth conductor importance.

Manual Navigation Guide

Operational Flow Chart for Users

A visual aid to help users select relevant chapters based on their needs and familiarity.

Product Description

Key Standard Features

Details core capabilities like four-quadrant operation, zero deadband, and linearity.

Integrated Protective Functions

Explains protection mechanisms against voltage, shorts, and temperature faults.

Type Designation

SIB-SSA Interface Board Details

Describes the SIB-SSA interface board for connector conversion and its role.

Technical Specifications

Model Specifications Summary

Presents a table of DC supply, current limits, size, and weight for SSA models.

Servo Control Operation

Input Signal Configurations and Gain

Details input configurations and calculations for current/velocity gain.

Velocity Mode Operation

Error Amplifier and Feedback Paths

Explains the error amplifier's function and its two feedback paths for DC/AC gain.

Current Mode and Control Loop

Transition to Current Mode

Describes disabling the velocity loop by converting the error amplifier for current mode.

Current Loop Control Details

Details current loop control using an op-amp and lag-lead network for optimum response.

Current Limits

Voltage-Current Operating Area

Illustrates the amplifier's operating limits in a voltage-current plane.

Time Dependent Peak Current Limit

Peak Current Duration Calculation

Explains how peak current duration depends on amplitude and operating current.

Protective Functions

Short Circuit Protection Details

Explains protection against output shorts and output-to-ground shorts.

Under/Over Voltage Protection

Details inhibition triggered by DC bus voltage outside specified limits.

Temperature Protection Mechanism

Describes inhibition when heatsink temperature exceeds 90°C.

Terminal Description

Power Stage Terminals

Lists and describes terminals for Vs, M1, M2, and G.

Control Stage Terminals

Details terminals 1-16 for reference, common, inputs, limits, monitor, and control signals.

Connector Pinout Diagrams

Shows connector pin assignments for SSA with and without SIB-SSA card.

Installation Procedures

Mounting Guidelines

Covers enclosure requirements, shock protection, and heat dissipation.

Wiring Best Practices

Details proper wiring, grounding, and shielding for optimal performance.

Load Inductance and Power Supply

Covers load inductance calculation and DC power supply requirements including capacitance and voltage.

Wiring Diagrams

Motor Wiring Configurations

Illustrates minimum, acceptable, and optimum motor wiring methods.

Connecting Non-Isolated Amplifiers

Grounding and Isolation Guidelines

Provides guidelines for grounding, avoiding ground loops, and using differential inputs.

Multi-SSA Connection

Connecting Multiple Amplifiers

Explains supply connections for multiple SSA units and reiterates previous rules.

Start-Up Procedures

Inhibit Logic Configuration

Explains how to configure the inhibit function using active low or closed contact methods.

Inhibit Logic Active High

Details configuring the inhibit function using active high signals and external resistors.

Mode Setup and Current Limits

Covers velocity mode, current mode, and static current limit adjustments.

Feedback and Compensation Setup

Details velocity feedback configurations and IxR compensation.

Amplifier Adjustment and Diagnostics

Balance and Current Limit Checks

Covers balance adjustment and verifying static current limits.

External Current Limit (ECL) Adjustment

Details scaling current limits dynamically using external voltage signals.

IxR Compensation for Speed Stability

Provides procedure to adjust R61 for improved speed stability.

Velocity Response Optimization

Explains adjusting the COMP trimmer (T1) and components for optimum velocity response.

Tables and Summaries

Adjusting Trimmers Overview

Lists the T1 (compensation) and T2 (balance) trimmers.

LED Diagnostics Guide

Explains LED indications for normal operation and fault conditions.

Appendix A: Response Adjustment

Current Loop Optimization

Details optimizing the current loop response by adjusting components like R20 and C11.

Dimensional Drawings

Main Unit Dimensions

Shows top and side views with dimensions in mm.

SIB Option and Mounting Configurations

Shows dimensions for SSA with SIB-SSA card and mounting legs.

Service Centers and Warranty

Service Center Locations

Lists contact information for service centers in Israel, Europe, and USA.

Warranty Performance Terms

Details warranty coverage, exclusions, and period.

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