We offer some of the best performing Linear Servo Amplifiers on the market today. Our LA Series Linear Servo Amplifiers are ideal for applications requiring low noise, high bandwidth and zero crossover distortion.
LA-407 Linear Servo Amplifier
Our linear servo amplifier design features a high-speed DSP that provides real-time fault monitoring and detection. Sophisticated algorithms are used to continually protect the amplifier from potentially damaging conditions, including overpower.
All of our amplifiers feature Safe Operating Area (SOA) protection, which monitors the power of each output transistor and protects the amplifier from damage in the event of an overpower condition. Linear servo amplifiers that do not have this feature can easily be damaged, or destroyed, if the power in the application exceeds the capability of the linear servo amplifier.
Our linear servo amplifiers have proven to be extremely reliable in the field due to our robust design, extensive fault protection circuits and quality control procedures. Each unit must undergo comprehensive testing including an Automated Test Procedure that ensures all circuits are working correctly.
Our proprietary Autobalance feature allows fast and easy setup of the amplifier with any motor or load. With the push of a button, this feature automatically balances the amplifier and motor for optimum system performance. Valuable manufacturing time (and money) can be saved since the balancing routine is typically completed in a few seconds and the technician does not need any special tools or equipment.
All of our linear servo amplifiers are easily configured using either the on-board jumpers or with the built-in serial interface. The serial interface also allows monitoring of the drive parameters and status in real-time during operation. All settings are stored in non-volatile memory during power-off conditions. Our servo amplifiers can easily be configured during production by downloading the settings from a host computer.
LA-415-SA Linear Servo Amplifier
500 Watt Linear Amplifier Data Sheet
800 Watt Linear Amplifier Data Sheet
1500 Watt Linear Amplifier Data Sheet
Stand Alone Linear Amplifier Data Sheet
LA-830-SA Linear Servo Amplifier
Varedan Linear Servo Amplifiers are available in the following modes:
Single-Phase Current Command Mode (Brush-type or Voice Coil Motor)
Accepts a single +/-10V analog input as current command reference. No feedback is required from the motor. The amplifier closes the current loop.
2-Phase Current Command Mode (3-Phase Brushless Motor)
Accepts two +/-10V analog inputs as current command references for two of the motor phases and derives the third phase internally. No feedback is required back to the amplifier, as the controller provides the commutation. The amplifier closes the current loops.
Trapezoidal Mode
Accepts a +/-10V analog input as a current (torque) command reference and commutates the motor using hall sensors, or commutation tracks from an encoder. The amplifier closes the current loops.
Torque Mode
Accepts a +/-10V analog input or serial command as a current (torque) command reference and commutates the motor using sinusoidal commutation from a motor mounted encoder. The amplifier closes the current loops.
Velocity Mode
Accepts a +/-10V analog input, TTL frequency pulse train, or serial command as a velocity (speed) command reference and commutates the motor using sinusoidal commutation from a motor mounted encoder. Profile ramping is done by the internal trajectory generator using either linear or S-curve ramping. The amplifier/controller closes the velocity and current loops using PID control.
Position Mode
Accepts position commands from the serial interface, and commutates the motor using sinusoidal commutation from a motor mounted encoder. Position commands can be either cyclical (resets every revolution) or linear. The DSP maintains a 32-bit internal position counter to allow up to +/-2147483648 positions. Rotary positions can be referenced to the encoder's index marker. Profile ramping is done by the internal trajectory generator using either linear or S-curve ramping. The amplifier/controller closes the position, velocity and current loops using PID control.
Note: Initial Motor Commutation
In all of the commutating modes, initial motor commutation can be established using either hall sensors or encoder commutation tracks (no motion on startup) or directly from the motor's quadrature encoder (requires movement on startup).
Key benefits of our Linear Servo Amplifier design
- Safe Operating Area (SOA) protection from overpower conditions
- High-bandwidth (up to 10kHz) for superior system response
- Ultra quiet linear output stage eliminates radiated noise
- Zero crossover distortion for precise positioning
- DSP-based design for performance, reliability, and ease of setup
- Extensive internal fault monitoring for reliable performance
- Autobalance feature automatically balances the amplifier and load
- All settings are digital, no potentiometers to adjust
- User programmable settings using high speed serial interface
- Non-volatile storage of all parameters for reliable startup
- Easily configured for any motor/feedback combination
- Many modes of operation to choose from
Performance
- Multiple power ranges available
- High efficiency heatsinks allow for small package size
- Single-axis motion modules provides commutation and positioning
Packaging
- Panel mount OEM modules
- Single-axis line powered stand-alone box
- Multi-axis line powered baseplate assemblies
- Custom packaging is available. Please contact us.
Typical Applications for our Linear Servo Amplifiers
- Linear Air Bearing Stages
- Rotary Air Bearing Spindles
- Spindle Control
- Semiconductor Processing
- Linear Servo Stages
- Rotary Servo Stages
- Diamond Turning Lathes
- Lens Grinding Equipment
- Laser Steering
- Ultrasonic Scanning
- Coordinate Measuring Machines (CMM)
- Disk Inspection Spin Stands
- Thermoelectric Cooling Control (TEC)
- Fiber Optic Welding
- High Resolution Positioning Systems
| Amplifier Power | Output Current | Dimensions | Mode of Operation | |||
|---|---|---|---|---|---|---|
| Cont./Peak | Cont./Peak | L x W x H | 2-Phase Current Command or Trapezoidal Mode |
Single-Phase Current Command Mode |
Current (Torque), Velocity (Speed), or Position Mode |
|
| Brushless | Brush | Brushless | Brush | |||
| 200/400W | 2.5/10A | 8.00" x 7.50" x 1.50" | LA-200 | LA-200S | LA-2100 | LA-2100S |
| 400/1200W | 5/15A | 8.00" x 7.50" x 2.25" | LA-407 | LA-407S | LA-4107 | LA-4107S |
| 500/1500W | 10/25A | 8.00" x 7.50" x 2.75" | LA-525 | LA-525S | LA-5125 | LA-5125S |
| 800/3000W | 15/30A | 8.00" x 7.50" x 4.75" | LA-830 | LA-830S | LA-8130 | LA-8130S |
| 800/4500W | 18/35A | 8.00" x 7.50" x 4.75" | LA-835 | LA-835S | LA-8135 | LA-8135S |
| 800/6000W | 20/40A | 8.00" x 7.50" x 4.75" | LA-840 | LA-840S | LA-8140 | LA-8140S |
| 1500/3000W | 20/35A | 8.00" x 7.50" x 5.75" | LA-1535 | LA-1535S | LA-15135 | LA-15135S |
| 1500/4500W | 25/45A | 8.00" x 7.50" x 5.75" | LA-1545 | LA-1545S | LA-15145 | LA-15145S |
| 1500/6000W | 30/55A | 8.00" x 7.50" x 5.75" | LA-1555 | LA-1555S | LA-15155 | LA-15155S |
| Amplifier Power | Output Current | Dimensions | Mode of Operation | |||
|---|---|---|---|---|---|---|
| Cont./Peak | Cont./Peak | L x W x H | 2-Phase Current Command or Trapezoidal Mode |
Single-Phase Current Command Mode |
Current (Torque), Velocity (Speed), or Position Mode |
|
| Brushless | Brush | Brushless | Brush | |||
| 400/1200W | 5/15A | 12.18" x 6.28" x 7.87" | LA-415-SA | LA-415S-SA | LA-4115-SA | LA-4115S-SA |
| 800/1500W | 10/30A | 17.70" x 8.75" x 7.93" | LA-830-SA | LA-830S-SA | LA-8130-SA | LA-8130S-SA |