SVA-III-M servo amplifier is a box type amplifier, which is a SVA-III board type amplifier integrated with standard 19-inch power chassis. Its controlling functions are same with that of SVA-III board type amplifier. It is mainly for controlling 3-stage valve with LVDT position sensor, has a LVDT demodulator circuit, and realizes closed-loop controlling with the inner loop of the servo valve’s coil, and is also of PID controlling of outer loop. By different settings of the jumping switch, it can also be used for controlling closed loop of position formed by a 2-stage servo valve and LVDT sensor. It is furnished with an integrated linear power supply. You can supply AC220V directly. It uses a standard casing. The front board ammeter indicates the valve’s coil current for easy observation in commissioning.

I. Main Features:
3-stage servo valve closed-loop controlling with LVDT position sensor
Setting and selecting outer loop PID controlling by a jumping switch
Limiting of output current
Adjustable inner loop gain
Easy and quick front-board testing and adjusting potentiometer
Straightforward valve coil current and power supply indication

II. Main Technical Parameters:
Power supply: AC220V
Servo amplifier
Analogue input: ±10V, 0-10V, 4-20mA
Load capacity: ±100mA, 100Ω
Proportional gain: 5-300mA/V
Integration gain: 8-4000mA/V-sec
Differential gain: 0.04-4mA/V-sec
Inner loop gain: 10-200mA/V
Oscillator
Frequency: 100-2500Hz
Amplitude: 2-11Vpp
Demodulator
Ripple: