Varedan Analog Linear Amplifiers
Since our founding in 2000, we have developed an extensive product line of analog linear servo amplifiers. Our designs incorporate class AB linear output stages for true linear output. Our linear amplifiers include an onboard high-speed DSP that monitors all key systems functions in real time, and provides protection for the output bridge by limiting the power to a “Safe Operating Area”. We offer our LALD series for high precision applications which require ultra-low current drift, in the range of micro amps per degree C.
Introducing our new VLA4 Digital Linear Amplifier. The VLA4 offers Varedan’s existing high performance analog linear servo amplifier technology with our new digital control platform that supports single phase for voice coils or brush-type, ABSine 2phase external commutation for 3-phase motors, internally commutated current mode, velocity or position mode operation. Feedback options include standard incremental quadrature to modern absolute digital systems such as BiSS and EnDat.
Standard Models
| Manufacturer |
Amplifier Series |
Current Continuous |
Current Peak |
Power Continuous |
Power Peak |
±VDC Bus Voltage |
| Varedan |
LA-200, 400 & 500 |
2.5 - 10 Amps |
10 - 25 Amps |
200 - 500 Watts |
400 - 1950 Watts |
±12 - ±85VDC |
| Varedan |
LA-800 & 1500 |
15 - 30 Amps |
30 - 55 Amps |
800 - 1500 Watts |
3000 - 6000 Watts |
±12 - ±150VDC |
| Varedan |
LALD-400, 500, 800 & 1500 |
5 - 15 Amps |
15 - 35 Amps |
400 - 1500 Watts |
1800 - 3800 Watts |
±12 - ±150VDC |
| Varedan |
LA6U-400, & 500 |
5 - 20 Amps |
15 - 40 Amps |
400 - 500 Watts |
1200 - 3000 Watts |
±12 - ±150VDC |
Varedan Intelligent Linear Servo Amplifiers
Varedan has a long history of providing extremely reliable high performance analog linear servo amplifiers for OEM customers. Following that tradition, Varedan’s Intelligent Analog Linear Servo Amplifier extends our product offerings to include advanced digital controls and simple to use PC based VaredanGUI™. The analog current loops(s) are designed for ultra-low current drift, in the range of micro amps per degree C. Furthermore, Varedan’s proprietary circuitry provides gain switching to allow very accurate low-level current (<500mA) control.
The Varedan Intelligent Linear Servo Amplifier offers Varedan’s existing high performance analog linear servo amplifier technology with our new digital control platform that supports single phase for voice coils or brush-type motors, ABSine 2phase external commutation for 3-phase motors, internally commutated current mode, velocity or position mode operation. Feedback options include standard incremental quadrature to modern absolute digital systems such as BiSS and EnDat.
Standard Models
| Manufacturer |
Amplifier Series
|
Current Continuous/Peak
|
Power Continuous/Peak
|
± VDC Bus Voltage
|
Dimensions
|
Weight
|
| Varedan |
VLA4-210
|
2.5/10A
|
200/400W
|
±12 - ±150VDC
|
7.50” x 8.00” x 2.612”
|
3.60 Pounds
|
| Varedan |
VLA4-415
|
5/15A
|
400/1800W
|
±12 - ±150VDC
|
7.50” x 8.00” x 2.612”
|
3.60 Pounds
|
| Varedan |
VLA4-525
|
15/25A
|
500/1900W
|
±12 - ±150VDC
|
7.50” x 8.00” x 2.612”
|
4.60 Pounds
|
| Varedan |
VLA4-540
|
15/40A
|
500/3800W
|
±12 - ±150VDC
|
7.50” x 8.00” x 2.612”
|
4.60 Pounds
|
| Varedan |
VLA4-825
|
15/25A
|
800/1900W
|
±12 - ±150VDC
|
7.50” x 8.00” x 3.871”
|
7.80 Pounds
|
| Varedan |
VLA4-840
|
15/40A
|
800/3800W
|
±12 - ±150VDC
|
7.50” x 8.00” x 3.871”
|
7.80 Pounds
|
| Varedan |
VLA4-1525
|
15/25A
|
1500/1900W
|
±12 - ±150VDC
|
7.50” x 8.00” x 4.871”
|
9.80 Pounds
|
| Varedan |
VLA4-1540
|
15/40A
|
1500/3800W
|
±12 - ±150VDC
|
7.50” x 8.00” x 4.871”
|
9.80 Pounds
|
VSA1 / VSA2 Series Digital PWM Servo Amplifiers
Varedan has a long history of providing reliable high performance linear servo amplifiers for OEM customers. Following that tradition, the VSA Digital PWM Servo Amplifier line extend our product offerings to include advanced digital controls, efficient power delivery, compact footprint, and simple to use tuning and configuration utilities while retaining the reputation for superior reliability and performance.
The VSA features a powerful microprocessor to provide reliable, high-precision motor control, stored motion profiles, and real-time scope functionality. The VSA features all standard modes of operation, from current (torque) mode to position mode, and includes external sine commutation mode for compatibility with advanced controllers and legacy applications. All standard forms of encoder feedback plus an auxiliary quadrature port can be utilized, giving the user the highest level of flexibility and freedom.
Standard Models
| Manufacturer |
Amplifier Series |
Current Continuous/Peak |
Power Continuous/Peak |
Bus Voltage |
Dimensions |
Weight |
| Varedan |
VSA1-510 |
5/10 Amps |
400/1000 Watts |
12 - 75 VDC |
5.50” x 3.55” x 1.45” |
0.70 Pounds |
| Varedan |
VSA2-1530 |
15/30 Amps |
6000/12000 Watts |
12 - 400 VDC |
7.125” x 4.60” x 1.45” |
0.94 Pounds |
Varedan Power Supplies & Transformers
DC Power Supplies
Varedan has DC Power Supplies up to 1KW which include the internal step-down isolation transformer. Varedan also has DC Power Supplies that accept external single phase or three phase step down isolation transformer inputs for up to 45KW of peak power.
Standard Models
| Manufacturer |
VPS Series Power Supply |
Internal Step-Down Transformer? |
Internal ±15VDC Amplifier Bias Supply? |
# of Amplifiers Supported |
Maximum Continuous Power |
Bus ±VDC/Peak Current |
| Varedan |
VPS-LA-500VA |
Yes |
Yes |
2 |
500W |
±35VDC - ±70VDC/25A |
| Varedan |
VPS-LA-1KVA |
Yes |
Yes |
2 |
1000W |
±35VDC - ±70VDC/25A |
| Varedan |
VPS-LA2A |
No |
Yes |
2 |
1000W |
Dependent on external transformer
±150VDC Max./25A |
| Varedan |
VPS-LA4A |
No |
Yes |
4 |
2000W |
Dependent on external transformer
±150VDC Max./25A |
| Varedan |
VPS-LAHP-2A |
No |
Yes |
2 |
3000W |
Dependent on external transformer
±150VDC Max./55A |
| Varedan |
VPS-LAHP-4A |
No |
Yes |
4 |
4000W |
Dependent on external transformer
±150VDC Max./55A |
Varedan AC Step Down Transformers
Standard AC step down isolation transformers to convert Mains Voltages to the lower voltages required by linear amplifiers are available. Varedan supplies both single phase and three phase transformers. Single phase transformers are available at 1 and 2 KVA. Three phase transformers are available at 3, 6 and 9 KVA.
Standard Models
| Manufacturer |
VTR Transformers |
Single or 3Φ |
Input Voltage |
Output Voltage |
Maximum Power |
| Varedan |
VTR-020-001 |
1Φ |
120/240VAC 50/60Hz |
28/72VCT (±40VDC or ±100VDC w/ Varedan Power Supply) |
1KVA |
| Varedan |
VTR-012-001 |
1Φ |
120/240VAC 50/60Hz |
35/50VCT (±50VDC or ±70VDC w/ Varedan Power Supply) |
2KVA |
| Varedan |
VTR-017-001 |
3Φ |
208/220/240/480VAC 50/60Hz |
61VAC/122VAC/171VAC (±50VDC, ±100VDC,±140VDC w/ Varedan Power Supply) |
3KVA |
| Varedan |
VTR-018-001 |
3Φ |
208/220/240/480VAC 50/60Hz |
61VAC/122VAC/171VAC (±50VDC, ±100VDC,±140VDC w/ Varedan Power Supply) |
6KVA |
| Varedan |
VTR-019-001 |
3Φ |
208/220/240/480VAC 50/60Hz |
61VAC/122VAC/171VAC (±50VDC, ±100VDC,±140VDC w/ Varedan Power Supply) |
9KVA |
* Transformers with non-standard secondary voltages are also available.
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.
Models & Specifications
Varedan Power Supplies
Varedan Transformers
| Manufacturer |
Product description
|
| Varedan |
VPS-LA-500VA Series
500VA Stand-Alone Linear Amplifier Power Supply - internal step down isolation transformer included. 120/240VAC 50/60Hz input. Outputs*: +/-60VDC amplifier bus (10A continuous/25A Peak - Total continuous output power should not exceed 500VA), +/-15VDC amplifier bias, AC for amplifier fans. Supports up to 2 amplifiers. *Consult factory for other bus voltages. |
| Varedan |
VPS-LA-1KVA Series
1KVA Stand-Alone Linear Amplifier Power Supply - internal step down isolation transformer included. 120/240VAC 50/60Hz input. Outputs*: +/-60VDC amplifier bus (10A continuous/25A Peak - Total continuous output power should not exceed 1KVA), +/-15VDC amplifier bias, AC for amplifier fans. Supports up to 2 amplifiers. *Consult factory for other bus voltages. |
| Varedan |
VPS-LA2A Series
2-Axis Linear Amplifier Power Supply - requires external single or three-phase center tapped isolation step down transformer. Inputs: 120/240VAC 50/60Hz @2A for powering +/-15VDC bias supply & amplifier fans, single or three-phase from secondary of center tapped isolation step down transformer for generating amplifier bus.
Outputs*: +/-VDC amplifier bus (10A continuous/25A Peak for each amplifier output), +/-15VDC amplifier bias, AC for amplifier fans. Supports up to 2 amplifiers. *Amplifier bus voltage is dependent on the transformer selected. |
| Varedan |
VPS-LA4A Series
4Axis Linear Amplifier Power Supply - requires external single or three-phase center tapped isolation step down transformer. Inputs: 120/240VAC 50/60Hz @2A for powering +/-15VDC bias supply & amplifier fans, single or three-phase from secondary of center tapped isolation step down transformer for generating amplifier bus.
Outputs*: +/-VDC amplifier bus (10A continuous/25A Peak for each amplifier output), +/-15VDC amplifier bias, AC for amplifier fans. Supports up to 4 amplifiers. *Amplifier bus voltage is dependent on the transformer selected. |
| Varedan |
VPS-LAHP-2A Series
2Axis High Power Linear Amplifier Power Supply - requires external single or three-phase center tapped isolation step down transformer. Inputs: 120/240VAC 50/60Hz @2A for powering +/-15VDC bias supply & amplifier fans, single or three-phase from secondary of center tapped isolation step down transformer for generating amplifier bus.
Outputs*: +/-VDC amplifier bus (30A continuous/55A Peak for each amplifier output), +/-15VDC amplifier bias, AC for amplifier fans. Supports up to 2 amplifiers. *Amplifier bus voltage is dependent on the transformer selected. |
| Varedan |
VPS-LAHP-4A Series
4Axis High Power Linear Amplifier Power Supply - requires external single or three-phase center tapped isolation step down transformer. Inputs: 120/240VAC 50/60Hz @2A for powering +/-15VDC bias supply & amplifier fans, single or three-phase from secondary of center tapped isolation step down transformer for generating amplifier bus.
Outputs*: +/-VDC amplifier bus (30A continuous/55A Peak for each amplifier output), +/-15VDC amplifier bias, AC for amplifier fans. Supports up to 4 amplifiers. *Amplifier bus voltage is dependent on the transformer selected. |
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