Varedan Technologies LA Series Technical Reference Manual
Linear servo amplifier
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Summary of Contents for Varedan Technologies LA Series
- Page 1 LA Series Linear Servo Amplifier LA-310 Technical Reference Manual Manual Part Number: 4090-42-001 3860 Del Amo Blvd. Suite 401, Torrance, CA 90503 www.varedan.com...
- Page 2 Torrance, CA 90503 Phone: 310-542-2320 www.varedan.com This document contains proprietary and confidential information of Varedan Technologies, LLC and is protected under Federal copyright law. The information in this document is subject to change without notice. No part of this document may be reproduced or transmitted in any form without the express written consent of Varedan Technologies, LLC.
- Page 3 LA-300 Series Linear Servo Amplifier Technical Reference Manual CAUTION! READ THIS SECTION BEFORE PROCEEDING. Warning! Potentially lethal voltages exist within the amplifier when power is applied. Never attempt to handle or probe the amplifier with power applied. This product contains static sensitive devices and requires proper handling with ESD protection. ...
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Page 4: Table Of Contents
LA-300 Series Linear Servo Amplifier Technical Reference Manual Contents Introduction ............................7 Safe Operation Area ........................7 Specifications ............................9 Electrical Specification ......................... 9 Mechanical Specification ......................9 Model Numbering ..........................10 3 Package Information ........................10 Open frame Module ........................10 4.1.1 Mechanical dimensions ...................... - Page 5 LA-300 Series Linear Servo Amplifier Technical Reference Manual 10.1 T mode, 3-phase motor A/B sinusoidal current control .............. 25 10.2 S mode, H-bridge single phase current control ................26 10.3 D mode, Half-bridge current control ................... 26 11 The Protection Functions ........................27 11.1 Faults ............................
- Page 6 LA-300 Series Linear Servo Amplifier Technical Reference Manual 12.3.29 RMSLEVEL:f .......................... 35 12.3.30 RMSTIME:f ..........................36 12.3.31 SHOWTRIP ..........................36 12.3.32 WRITE ........................... 36 13 Sales and Services ..........................36...
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Page 7: Introduction
LA-300 Series Linear Servo Amplifier Technical Reference Manual 1 Introduction LA 300 series are compact, high voltage, high current linear amplifiers designed to drive brushless and brush motors or voice coils. They are the perfect choice for systems requiring low radiated noise, zero cross-over distortion and low drift from the drive electronics. - Page 8 - it’s the power that has to be kept under control. The DSP in the LA series amplifiers monitors the power of each output device in real time as the device is switched on by the control circuitry. This instantaneous power measurement is compared with the transistor manufactures recommended “safe operating area”...
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Page 9: Specifications
LA-300 Series Linear Servo Amplifier Technical Reference Manual 2 Specifications 2.1 Electrical Specification Parameter LA-310 Peak Output Current Continuous Output Current Peak Output Power (25° C) 600W Continuous Power Dissipation (25° C) 300W Max. Heat Sink Temperature 70° C Absolute Overcurrent Trip Time 50 ms Current Loop Bandwidth up to 10KHz... -
Page 10: Model Numbering
LA-300 Series Linear Servo Amplifier Technical Reference Manual 3 Model Numbering Model number breakdown: LA-CCCD-WWWW-ZZZ Field Number Description Available Options Notes Varedan linear servo Product Series amplifier Power and current level 310 – 300W, 10A peak Drive mode configuration T – 3 phase AB mode User configurable, S –... -
Page 11: Mechanical Dimensions
LA-300 Series Linear Servo Amplifier Technical Reference Manual 4.1.1 Mechanical dimensions 4.1.2 Mounting bracket – optional... -
Page 12: Dc Standalone Module
LA-300 Series Linear Servo Amplifier Technical Reference Manual 4.2 DC Standalone Module 4.2.1 Mechanical dimensions... -
Page 13: Ac Standalone Module
LA-300 Series Linear Servo Amplifier Technical Reference Manual 4.3 AC Standalone Module 4.3.1 Mechanical dimensions... -
Page 14: Interface Connections
LA-300 Series Linear Servo Amplifier Technical Reference Manual 5 Interface Connections 5.1 Open frame module 5.2 DC standalone module... -
Page 15: Ac Standalone Module
LA-300 Series Linear Servo Amplifier Technical Reference Manual 5.3 AC standalone module 5.4 P1 – Signal I/O Connector Mating Connector = Amphenol 17EHD-015-P-AA-0-00 or equivalent. Signal Direction Voltage Description Number Level CMD A+ Input +/-10V Phase A current command. +/-10V single ended, +/-5V differential CMD A- Input... -
Page 16: P2 - Bus Power Connector
LA-300 Series Linear Servo Amplifier Technical Reference Manual 5.5 P2 – Bus Power Connector P2 is the 3-position terminal block header. P2 is the bus power connector of DC standalone module. P2 mating connector = Wurth 691351400003 or equipment. Signal Direction Voltage Level Description... -
Page 17: P6 - Bias Power Connector
LA-300 Series Linear Servo Amplifier Technical Reference Manual Motor Phase A In/Out Motor Lead A Motor Phase B In/Out Motor Lead B Motor Phase C In/Out Motor Lead C Motor cable shield or frame ground (tied to Amp GND) 5.9 P6 – Bias Power Connector Mating Connector = Wurth 691351500003 or equivalent. -
Page 18: I/O Notes
LA-300 Series Linear Servo Amplifier Technical Reference Manual Use the table above to determine the correct fuse value. • Reinstall the fuse module such that the correct voltage value will show through the window. • Close the window. • 5.12 I/O Notes Note2: Each Opto-isolated Output has the following circuit with a solid-state relay capable of 100mA load current. -
Page 19: User Jumper Settings - Sw1
LA-300 Series Linear Servo Amplifier Technical Reference Manual 6 User Jumper Settings – SW1 6.1 Drive mode configuration Drive Mode SW1-1 SW1-2 Description T mode 3-phase current output, for 3-phase motor drive. User sends 2 sinusoidal current commands, CMD A and B. S mode 1 Single phase H bridge mode, for singe phase motor or voice coil load. -
Page 20: Phase A And B Current Loop Bandwidth Settings
LA-300 Series Linear Servo Amplifier Technical Reference Manual 6.4 Phase A and B current loop bandwidth settings The bandwidth setting is used to select different current PI controller gains. There are total 4 different PI gain selections. They can be used to set 4 different bandwidth for the same load or 4 different loads. Bandwidth SW1-7 SW1-8... - Page 21 LA-300 Series Linear Servo Amplifier Technical Reference Manual LED Code Description No faults – motor current enabled. This is the “normal” display when enabled. DSP Fault – set when the DSP checksum detects an internal fault. NVM Fault – set when NVM checksum fails following reset. Parameter defaults are set. C Fault –...
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Page 22: Reset Button
9.1.1 PC based terminal software options Many terminal programs can be used to communicate with the LA series amplifiers over the serial port. Varedan recommends the use of the freely available open source TeraTerm. -
Page 23: Host Communication Protocol
LA-300 Series Linear Servo Amplifier Technical Reference Manual 9.1.3 Host Communication Protocol Once the host communication program is properly configured and the host cable is connected, apply power to the amplifier. The amplifier should respond with the sign-on message and software version which should look like the following text in the terminal window. -
Page 24: Load Parameter File To Drive Nvm
LA-300 Series Linear Servo Amplifier Technical Reference Manual Commands are entered using ASCII characters from the terminal. To enter a command with a user entered data field, the command name is followed by a “:” followed by the data for the command, followed by Enter (carriage return). -
Page 25: Applications Information
LA-300 Series Linear Servo Amplifier Technical Reference Manual 10 Applications Information The LA-300 series amplifier current loop controls apply to 3 different operation modes: T mode, S mode and D mode. For each LA-300 amplifier, T mode is configured to drive one 3-phase motor, S mode is configured as an H-bridge to drive a single-phase motor, a brushed DC motor, or one voice coil, and D mode is configured as 3 independent half-bridges to drive 3 single-phase motors or 3 voice coils. -
Page 26: S Mode, H-Bridge Single Phase Current Control
LA-300 Series Linear Servo Amplifier Technical Reference Manual 10.2 S mode, H-bridge single phase current control In S mode, the amplifier is configured as an H bridge to drive a single-phase motor, a brushed DC motor, or a voice coil. The current command input comes from CMD A only. Motor leads connect to phase A and phase C of the drive outputs. -
Page 27: The Protection Functions
LA-300 Series Linear Servo Amplifier Technical Reference Manual 3 Half-bridge Current Control Description Drive mode D mode (SW1-1 OFF, SW1-2 ON) Motor leads connection Motor 1, Phase A output and GND Motor 2, Phase B output and GND Motor 3, Phase C output and GND Current command A Motor phase A current reference, single ended or differential pair. -
Page 28: Absolute Over Current Fault
LA-300 Series Linear Servo Amplifier Technical Reference Manual 2. Software shutdown – the DSP continuously checks the module temperatures against a user- configurable temperature trip level. If any of the 3 modules exceed the trip level, the software will disable the drive and assert an active fault. 11.1.3 Absolute Over Current Fault The DSP prevents the amplifier modules from outputting phase currents exceeding the user-configurable peak current limits for more than 50ms. -
Page 29: Ref Fault
LA-300 Series Linear Servo Amplifier Technical Reference Manual bias supply voltages. If the measured supply voltages are outside of their range, the DSP will disable the drive and assert an active fault. This fault requires a system reset or ALARMRESET command to clear. 11.1.8 2.5V Ref Fault The 2.5V reference is generated on-board using the +/-15V bias supply. -
Page 30: Serial Command List
LA-300 Series Linear Servo Amplifier Technical Reference Manual 12 Serial Command List 12.1 Command Category The serial commands are grouped as 3 categories, immediate, configuration, and status. Immediate commands tell the amplifier executes the command immediately. Configuration commands define the amplifier and motor parameters. -
Page 31: Abslevel:f
LA-300 Series Linear Servo Amplifier Technical Reference Manual 12.3.2 ABSLEVEL:f Sets the peak current limit. This value is used both as a peak current trip threshold and as part of the I2T protection algorithm. Category Configuration Parameter Float Range [RMSLEVEL, 10.0] 12.3.3 ABTRANS Displays the Phase A/B Transconductance setting that was configured using hardware SW1. -
Page 32: Defaults
LA-300 Series Linear Servo Amplifier Technical Reference Manual Category Configuration Parameter 12.3.9 DEFAULTS Sets all the user parameters to the factory default values. Issuing a WRITE command following this command will save the factory default values to the flash NVM. Category Immediate Parameter... -
Page 33: Extenable:n
LA-300 Series Linear Servo Amplifier Technical Reference Manual 12.3.14 EXTENABLE:n Sets the enable control to utilize the hardware input or software command. This command works in conjunction with the external enable command (EXTENABLE) and will not affect the software ENABLE/DISABLE commands. Category Configuration Parameter... -
Page 34: Fangains:f1:F2
LA-300 Series Linear Servo Amplifier Technical Reference Manual Category Configuration Parameter Integer Range [0, 100] 12.3.19 FANGAINS:f1:f2 Sets the fan P & I gains. This command works in conjunction with the fan mode command (FANMODE) and is only used in FANMODE:3 (PI control). The first data field sets the Kp gain. The second data field sets the Ki gain. -
Page 35: History
LA-300 Series Linear Servo Amplifier Technical Reference Manual 12.3.24 HISTORY Displays previous fault history. Category Status Parameter 12.3.25 Displays all three phase currents in amps. This command can only be queried. Category Status Parameter 12.3.26 INFILTER:n1:n2 Sets the Command (ref) A/B and Command (ref) C hardware input filter switches. The inputs filters utilize 4-pole software selectable switches to change the filter frequency responses. - Page 36 Parameter 13 Sales and Services Varedan Technologies warrants this product to be free of manufacturing defects for a period of 1 year. If your product requires services, please contact our factory for troubling information and if needed, return material authorization (RMA) information.
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