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Glentek: Brushless Servo Amplifiers (SMB9815/SMC9815)
Glentek: Brushless Servo Amplifiers (SMB9815/SMC9815)
 
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Glentek: Omega Series Digital PWM Brushless Servo Amplifiers

Glentek’s Omega Series Digital PWM Brushless Servo Amplifiers offer the latest in high performance DSP control of both rotary and linear brushless servo motors. With extensive utilization of surface mount technology and special heat transfer techniques, the Omega Series offers one of the world’s most powerful products for a given form factor.

The Omega Series is comprised of the following models

Full Feature Servo Amplifier

The Full Feature servo amplifier operates in current (torque) or velocity (RPM) mode, accepts a +/-10V analog input as a command reference and commutates the motor sinusoidally for ultra smooth operation at low speeds. It requires an incremental encoder to derive the velocity signal and to commutate the motor. The absolute commutation angle is usually determined using Hall sensors or encoder Commutation tracks. However, in some cost sensitive applications where slight motor movement is acceptable upon power up, the amplifier can perform a power-on phase finding algorithm which eliminates the need for Hall sensors or Commutation tracks. Special versions are also available that decode Sanyo Denki, Tamagawa and Yaskawa reduced wire encoders.

2-Phase Current Mode Servo Amplifier

The 2-Phase Current Mode servo amplifier accepts two +/-10V analog inputs as current command references for two of the motor phases and derives the third command reference. This amplifier does not use any feedback devices and is used with controllers that provide the commutation.

Pulse Follower Servo Amplifier

The Pulse Follower servo amplifier incorporates all the features of the Full Feature servo amplifier and also accepts two digital pulse inputs as a position command reference. The two pulse inputs are high speed, differential and optically isolated digital inputs which can be configured to decode three pulse types and can be geared up or down (electronic gearing). The motor position and speed are a function of the number of pulses and the rate of the pulses respectively. The following pulse types can be decoded:

Quadrature – Two pulse inputs in quadrature, such as the output of an incremental encoder or an encoder pot determine both command distance and direction. This pulse decoding is useful to slave one motor to another by connecting the master motor’s encoder output to the slave motor’s pulse inputs.

Pulse (step) and Direction – The first input is a pulse train used to establish the absolute distance and velocity of the command and the second input is a direction signal used to establish the polarity of the command. This pulse type is output by many stepper motor controllers and allows upgrading a stepper motor system to a servo motor system without the need to change controllers.

CW/CCW Pulse mode – The first input is a pulse train to command positive moves and the second input is a pulse train to command negative moves. This pulse type is also generated by some older stepper motor controllers and may be useful in upgrading to a servo motor system.

Omega Series Digital PWM Brushless Servo Amplifiers

  • Digital current loops: Current loop bandwidths up to 3 kHz.

  • Digitally tuned: All parameters set digitally. No potentiometers to adjust. DSP control for the ultimate in high performance.

  • Silent operation: 25 kHz PWM standard.

  • Complete isolation: Complete optical isolation between signal and power stage.

  • Wide operating voltage*: 30-370 VDC for Amplifier modules versions. All stand-alone and multi-axis versions can be ordered for operation from either 110-130 VAC or 208-240 VAC (single or 3-phase, 50/60 Hz).

  • Direct AC operation: No transformer required for stand-alone units or multi-axis chassis. The SMB9815 and SMC9815 stand-alone units and multi-axis chassis include DC power supply, cooling fans, soft-start circuitry and a regen clamp with dumping resistor. The SMA9807 stand-alone unit includes DC power supply.

  • Fault protection: Short from output to output, short from output to ground, amplifier RMS over current, amplifier under/over voltage, amplifier over temperature, motor over temperature.

  • RS-232 or RS-485: High speed (115.2K baud) serial communication interface for set-up and tuning. RS-485 multidrop with up to 31 amplifiers installed.

  • Software configurable: Glentek’s Windows™ based MotionMaestro™ software provides ease of set-up and tuning with no previous programming experience required. This software is Windows™ 95/98/2000 and NT compatible.

  • Non-volatile memory: All parameters and positions are stored in non-volatile memory for reliable start up. In addition, up to two different configurations can be stored at one time.

  • Dedicated inputs: +/- limits, inhibit, fault, motor over temp & reset.

  • Dedicated outputs: Analog monitor, fault and divided encoder.

  • Three basic models: Covering almost all servo needs, the Omega Series includes a full feature current/velocity amplifier, a 2-phase input current amplifier, and a pulse following amplifier.

  • Encoder output divider: The frequency of the encoder output can be divided from the input by any integer 1-8. Note: Nonstandard frequency divisors can be ordered on request.

  • Encoder feedback: Accepts encoder signals up to 4.3 Mhz. Special versions are also available that decode Sanyo Denki, Tamagawa and Yaskawa reduced wire encoders.

  • Status indicator: 7-segment display indicates amplifier status and diagnostics.

  • Sinusoidal commutation: For the ultimate in efficiency and smooth motion. Commutates from almost any resolution linear or rotary encoder.

  • External logic supply (SMC98XX models only): 24 to 48VDC, 600mA @ 24VDC Powers all amplifier logic and encoders.

  • SMT construction: Provides ultra compact size, cost competitive package and high reliability.

  • CE compliant: All servo amplifiers are CE marked.

  • Parametric filtering: Provides control engineers advanced filtering to eliminate unwanted system mechanical resonances.

*SMA9807 Stand-Alone is single phase input power only.


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