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From galilmc.com
The “Servo Amplifier” on-line tutorial reviews the operation of servo amplifiers used to drive DC and brushless motors. The complete tutorial with audio can be viewed at http://www.galilmc.com/training/webconf.html The tutorial begins with a discussion of the power regulating methods, leading to the two types, linear and pulse-width-modulated (PWM) amplifiers. The PWM amplifiers are much more common, whereas linear amplifiers are used with a power rating of less than 100 watts. Further discussed is the switching method. The two common approaches, the bipolar and unipolar methods, are presented with their relative merits. The effect of the switching on the current waveform is analyzed and the resulting worst-case ripple on the current waveform is found to be: Products & Services
Pulse width modulated (PWM) amplifier chips generate a current that switches between high and low output levels. PWM amplifiers have a much higher power capability for a given volume than linear amplifiers. They are also less expensive.
DC motor drives act as the interface and power supply between a motion controller and a DC motor.
Isolation amplifiers electrically isolate input and output signals, often by inductive couplings. Isolation amplifiers, or iso-amps as they are sometimes called, may be used to protect components from potentially dangerous voltages or to amplify low-level analog signals in applications with multiple channels.
Motor controllers receive supply voltages and provide signals to motor drives that are interfaced to motors. They include a power supply, amplifier, user interface, and position control circuitry.
Power operational amplifiers (POA) are used to increase the power of low-level signals in applications that drive low impedances or reactive loads. They dissipate excess energy as heat, deliver extensive current, and can sustain relatively high supply voltages.
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This paper is an abstract for the “Control of Piezo Ceramic and Ultrasonic Actuators” on-line tutorial. The complete tutorial with audio can be viewed at http://www.galilmc.com/training/webconf.html...
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This paper is an abstract for the “Backlash Compensation Methods” on-line tutorial. The complete tutorial with audio can be viewed at: http://www.galilmc.com/training/webconf.html
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This paper is an abstract for the “Tuning Servo Systems” on-line tutorial. The complete tutorial with audio can be viewed at http://www.galilmc.com/training/webconf.html This course presents some...
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Class B amplifiers are essentially the opposite of those that operate in Class A. No current flows when the output devices are idle, and thus must turn on from a zero-current state when signal is...
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Technical Articles
Servo Amplifier Tutorial (.pdf)
- Motor Controls and Drives
Application Note: Best Practices for Servo Amplifier Wiring
- Wires, Cables, and Accessories
The Science of Tuning Servo Motors
- Motors
Servo Types
- Machine and Motion Controllers
Application Note: Servo System Wiring Recommendations
- Wires, Cables, and Accessories
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