SVA-III-S Servo Amplifier

Description
SVA-III-S is a board type electro hydraulic servo amplifier with position demodulator, which is mainly for controlling 3-stage valve with LVDT position sensor. It has LVDT demodulator circuit, and realizes closed-loop controlling within the inner loop of servo valve's coil.
Moreover, Board servo amplifier is also for PID controlling for external loop. By setting of jumping switch, it can also be used for controlling closed loop of position formed by a 2-stage servo valve and LVDT sensor.

Application
SVA-III-S electro hydraulic servo amplifier are specially used for driving and controlling electro-hydraulic servo valves. The amplifiers are mainly for high accuracy controlling of electro-hydraulic servo valves like nozzle flapper servo valves, and jet pipe servo valves, etc. In a hydraulic system, it is possible to control physical parameters, like position, speed, acceleration and force by using various hydraulic devices and measuring sensors. For example: Valve-controlled cylinder, valve controlled motor, valve-controlled pumps, etc.

Features of Board Servo Amplifier
1. 3-stage servo valve closed-loop controlling with LVDT position sensor
2. Setting and selecting outerloop PID control by a jumping switch
3. Limiting of output current
4. Adjustable inner loop gain
5. Easy and quick front-board testing and parameter adjusting potentiometer

Parameters of Electro Hydraulic Servo Amplifier

Power supply		V	DC±15 or ±24
Servo amplifier	Analogue input		±10V, 0-10V, 4-20mA
	Servo valve driving capacity		±100mA, 100Ω
	Prorortional gain	mA/V	5 to 300
	Integration gain	mA/V-sec	8 to 4000
	Differential gain	mA/V-sec/v	0.04 to 4
	Inner loop gain	mA/V	10 to 200
	Disturbance signal		200 Hz 5Vpp
Oscillator	Frequency	Hz	100 to 2500
	Amplitude	Vpp	2 to 11
Demodulator	Ripple	mVp-p	<40(within given excitation frequency)
	Gain	Vdc/Vp-p	1 to 10
Operation range		℃	0 to 50
Outline size		mm	100 × 160