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AC induction servo motor amplifier

2015-01-03 19:13  
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A servomotor is a rotary actuator that allows for precise control of angular position. It consists of a motor coupled to a sensor for position feedback. It also requires a servo drive to complete the system. The drive uses the feedback sensor to precisely control the rotary position of the motor. This is called closed-loop operation. By running the system closed-loop, servomotors provide a high performance alternative to stepper and AC induction motors.The signal from a synchro receiver or a variable resistive cam follower (potentiometer) is boosted by operational amplifier Ul, whose output swing is limited by back-to-back zeners D3 and D4. The signal is then applied to operational amplifiers U2 and U3, which drive the gates of Ql and Q2 respectively. The npn transistor (Q3) is a fast current limiter for the n-channel MTM8N10; a pnp transistor (Q4) performs the same function for the p-channelMTM8P10. Capacitors C3 and C4 eliminate the need for accurate dc offset zeroing.T1 steps up the output voltage to 120 V for the 400 Hz servomotor.Control Techniques offers a full range of servo motors in a variety of choices to meet your needs. The Unimotor FM motor series is a high quality motor with many configuration and feedback options. The NT motor has an advanced motor design offering a compact footprint with high torque and low inertia -- ideal for dynamic applications. The XV motor is perfect for cost-sensitive applications that still require servo performance.
 

400 Hz servo amplifier