Glentek’s SMA6520 series linear servo drives provide the optimum solution for applications which require high current loop bandwidth, low radiated electrical noise, and zero crossover distortion. These drives incorporate our latest generation ISO-BIAS current sense technology, which results in one of the lowest drift linear drives on the market today. These drives are constructed using surface mount technology and incorporate the latest in heat transfer technology which make them one of the most powerful drives for a given form factor. Typical applications which are ideal for the SMA6520 series linear drives include low inductance/resistance brushless motors (linear or rotary) and high resolution air bearing linear brushless motor stages.

The SMA6520 series is highly configurable and can operate in the following commutation modes:

  • External sine commutation (2-phase current mode) (-11 plug-in board) of three-phase brushless servo motors. In this mode, the drive accepts two +/-10 VDC analog inputs as a current command reference for two of the motor phases. The third phase is derived within the drive from the two reference phases. This drive does not require any feedback devices and is used with controllers that provide the commutation.
  • Trapezoidal commutation (-12 plug-in board) of three-phase brushless servo motors. In this mode, the drive accepts a +/-10 VDC analog input as a current command reference and utilizes the Hall Sensors which are mounted on the motor for commutation of the motor in current (torque) mode.
  • Encoder-based sinusoidal commutation (-24 plug-in board) of three-phase brushless servo motors. In this mode, the drive accepts a +/-10 VDC analog input as a current (torque) or velocity (RPM) command reference and sinusoidally commutates the motor by Hall Sensors or encoder commutation tracks and an incremental encoder. Note: This version can operate without Hall Sensors or encoder commutation tracks by using Glentek’s “twang mode” initialization.

Note: Voice coil and DC brush modes are also available upon request.

Command/Control Modes
+/-10 VDC for current (torque)
+/-10 VDC for velocity (RPM)
Feedback
Analog tachometer (required for velocity control)
Dedicated Inputs
Single-ended or differential signal command, tachometer, +/- limits, inhibit/enable, fault, reset
Motor temperature and master slave (SMB7200 series only)
Dedicated Outputs
Motor current, fault, low-speed electronic circuit breaker, high-speed electronic circuit breaker, over-voltage, and over-temperature
Performance
Bandwidth All servo drives have a nominal 10kHz current loop bandwidth which varies with the motor inductance.
Linear output stage Provides high bandwidth, low noise, and zero crossover distortion.
Multimode operation The 2-phase sinusoidal current mode servo drive can drive 3-phase brushless servo motors in current (torque) mode. The Trapezoidal servo drive can drive 3-phase brushless servo motors in current (torque) mode and can close the velocity loop via feedback of a DC tachometer. The encoder-based sinusoidal servo drive can drive 3-phase brushless servo motors in current (torque) or velocity (RPM) mode.
Current limit Peak motor current is adjustable.
Regulatory
RoHS Compliant RoHS compliance optional.
CE Marked All servo drives are CE marked.
Feedback
Hall sensors or commutation tracks Accepts Hall sensor feedback or commutation track signals from an encoder.
Encoder Accepts quadrature encoder feedback.
I/O
Dedicated inputs +/- limits, enable, fault, motor over temperature and reset for Trapezoidal and Encoder-based versions. Enable, fault, motor over temperature and reset for 2-phase sinusoidal versions.
Motor over temp An input is provided for a motor over temperature switch and will shutdown the drive and display a fault.
External fault reset An input is provided to reset the drive in the event of a fault.
Build
Status indicator 7-segment LED display indicates drive status and diagnositics.
Fault protection Fault protection: Short from output to output, short from output to ground, drive RMS over current, drive under/over voltage and drive over temperature.
Manual reset A push button reset is available to reset a fault.
Industry standard mounting Available in a standard heatsink module, large heatsink module w/fan and cover or a 2-axis chassis version. Note: Glentek offers custom mounting configurations to meet virtually any requirement.
Ergonomic Design Easy access to connections, adjustments and test points.
SMT construction Provides ultra compact size, cost competitive package and high reliability.
Electrical Ratings
Input Voltage: +/-20 to +/-55 Bipolar VDC for standard voltage drive modules. +/-25 to +/-75 Bipolar VDC for high voltage drives modules. 14-39 VAC from transformer with center tap for multi-axis packages. Non-standard voltages available upon request.
Continuous Output Current: 10 A
Continuous Power Output: 400-500 W
Environmental Conditions
Storage Temperature: -40°C to 80°C
Standard Operating Temperature: 0°C to 40°C without current derating, up to 50°C with 25% derating
Special Operating Temperature: -40°C to 40°C without current derating, up to 50°C with 25% derating
Humidity: 5% to 95% relative humidity, non-condensing
Altitude: Up to 1000m without derating, derate current 10% per 1000m above 1000m
 

SMA6520-50HS Module Module Mechanical Dimensions

SMA6520HS Module - Dimensions are in inches [mm]

SMA6520-50HS Multi-Axis Multi-Axis Mechanical Dimensions

SMA6520HS 2-Axis Package - Dimensions are in inches [mm]

SMA6520-50HF Module Module Mechanical Dimensions

SMA6520HF Module - Dimensions are in inches [mm]