Call us 310-542-2320 info@varedan.com Home Products Servo Amplifier Sizing & Tools Company News Contact Us VLA4 Series Intelligent Linear Servo Amplifiers The VLA4 combines Varedan’s high performance class AB linear analog ultra-low drift output stage with our new digital control platform. Feedback options include standard incremental quadrature to modern absolute digital systems such as BiSS and EnDat. Easy to Use Graphical User Interface The PC based VaredanGUI™, with it’s built in command stimulus and real time oscilloscope signal tracer views, reduces the requirements for external equipment while setting up new systems. The standard Ethernet based communications easily connects with all modern computers. Full system configuration can be saved and uploaded for quick and easy drive provisioning. Real-Time Oscilloscope VaredanGUI Graphical User Interface Modes of Operation Current Mode In current mode the amplifier is commutated by an external controller. Our Linear Amplifier Series are designed to drive single & 3-phase loads by analog input commands. These current mode linear amplifiers are available in the following standard configurations: “T-Mode” – Three-phase current output. This configuration is used for driving three phase rotary or linear motors with a full-bridge output configuration. In this configuration the amplifier receives two sinusoidal current commands for phases A and B (ABSine). The phase C command is generated internally in the amplifier. “S-Mode” – Single-phase H-Bridge type output. This configuration is used for driving single phase loads such as brush-type motors or voice coils. In this mode the amplifier can deliver the full rail-to-rail bipolar bus voltage to the load. The following is an example of S-Mode operation. When operating in full-bridge configuration (Phase to Phase), the maximum bus voltage that can be applied to the voice coil is the full B+ to B- voltage. For example if you are using a +/-50VDC bus and a full-bridge connected voice coil, the maximum voltage that can be applied to the voice coil is +100V or -100V. This is illustrated in the following picture which shows positive current from PhaseB to PhaseC (+100V): S-Mode Operation “D-Mode” – Dual independent Half-Bridge type outputs. This mode is used to drive two independent single phase loads, such as brush-type motors or voice coils, with one amplifier module. In this mode the amplifier can deliver half of the full rail-to-rail bipolar bus voltage to the load. The sum total wattage requirements of the two independent loads must be within the capabilities of the amplifier module. The following is an example of D-Mode operation, (or one or two voice coil connected to a T-Mode amplifier). When operating in Half-Bridge configuration (Phase to Common), the maximum bus voltage that can be applied to the voice coil is 1/2 of the full +/-Bus supply. For example if you are using a +/-50VDC bus and a half-bridge connected voice coil, the maximum voltage that can be applied to the voice coil is +50V or -50V. This is illustrated in the following picture which shows positive current from phaseB to Common (+50V): The VLA4 can be configured and tuned through an easy to use PC based VaredanGUI™. The VLA4 supports: D-Mode Operation Single or three phase analog current commands Internally commutated current mode Velocity mode Position mode Request Application Assistance Tell us about your application so we can help you select the right solution. Please use this fillable PDF form to guide you through the information about your application that we need to properly size and select an amplifier for your application. Please also see out Amplifier Sizing & Tools page for sizing calculators, white papers and other tools. Standard Models Amplifier Series Current Continuous/Peak Power Continuous/Peak ± VDC Bus Voltage Dimensions Weight VLA4-210 2.5/10A 200/400W ±12 - ±150VDC 7.50” x 8.00” x 2.612” 3.60 Pounds VLA4-415 5/15A 400/1800W ±12 - ±150VDC 7.50” x 8.00” x 2.612” 3.60 Pounds VLA4-525 15/25A 500/1900W ±12 - ±150VDC 7.50” x 8.00” x 2.612” 4.60 Pounds VLA4-540 15/40A 500/3800W ±12 - ±150VDC 7.50” x 8.00” x 2.612” 4.60 Pounds VLA4-825 15/25A 800/1900W ±12 - ±150VDC 7.50” x 8.00” x 3.871” 7.80 Pounds VLA4-840 15/40A 800/3800W ±12 - ±150VDC 7.50” x 8.00” x 3.871” 7.80 Pounds VLA4-1525 15/25A 1500/1900W ±12 - ±150VDC 7.50” x 8.00” x 4.871” 9.80 Pounds VLA4-1540 15/40A 1500/3800W ±12 - ±150VDC 7.50” x 8.00” x 4.871” 9.80 Pounds Key Design Benefits PC Based Varedan GUI for configuration and tuning Multiple Power Levels Share Common Interface Safe Operating Area Protection of Power Devices Fully Opto-Isolated IO Linear Analog Current Loop for Quiet Operation Analog Current/Torque, Digital Velocity and Position Control Up to 10kHz Bandwidth Single and 3-Phase; Linear, Rotary and Voice Coil Motors Ethernet and RS232 Communications Interfaces Dual feedback ports, input and output, supporting halls, quad, sine and absolute digital encoders Zero Crossover Distortion 24V Keep Alive Option Expansion Interface Board (Optional) Factory or Customer Programmable Options: RMS Overcurrent Trip Level RMS Overcurrent Trip Time Current Loop Bandwidth Options Amplifier Overtemperature Trip Level Absolute Overcurrent Trip Level Models & Specifications VLA4-200/400/500 Series VLA4-800 Series VLA4-1500 Series Package Type Datasheet Installation Drawing Manual STEP File Amplifier Module - For high density or OEM applications. Available with or without covers. Contact Varedan Stand-Alone Amplifier Package - For "plug & play" applications. Available in a fully enclosed package with built in fan and power supply. Contact Varedan Contact Varedan 2 Axis Package with 500VA Power Supply (isolation transformer included) - Mounted on a baseplate with built in fan & power supply. Contact Varedan Contact Varedan 2 Axis Package with 1KVA Power Supply (isolation transformer included) - Mounted on a baseplate with built in fan & power supply. Contact Varedan Contact Varedan 2 Axis Package (needs external isolation transformer) - Mounted on a baseplate with built in fan. Contact Varedan Contact Varedan 4 Axis Package (needs external isolation transformer) - Mounted on a baseplate with built in fan. Contact Varedan Contact Varedan Let our knowledgeable staff help you with your motion control needs CONTACT US TODAY! 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