Summary of Contents for Arcee Automation 1500
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Page 1: Servo Amplifiers
‘ENCORE’ SERIES SERVO AMPLIFIERS MODEL 1500 USER MANUAL ARCEE AUTOMATION NO.32, BLOCK II, SIDCO COMPLEX, GUINDY, CHENNAI 600 032. July 2000... -
Page 2: Theory Of Operation
INTRODUCTION The ‘Encore’ Series amplifiers are second generation products designed for low cost and high performance. They are designed for edgewise mounting and can operate from power supplies ranging from 24V to 150V DC. A wide range of inductive loads can be driven by the amplifiers. All models feature fully differential inputs for the control, or reference, voltage. -
Page 3: Fault Output
SALIENT FEATURES MOSFET DRIVE FOR HIGH EFFICIENCY Rugged power MOSFETs are used in the power stage. These have lower losses than comparable bipolar transistors, resulting in higher efficiency and also improved reliability due to lower temperatures. Also, MOSFETs have peak current ratings of approximately 10 times the average current, which makes them totally immune to spikes and surges. -
Page 4: Supply Voltage
TECHNICAL SPECIFICATIONS : MODEL ENCORE 1500 Typical specs at 25 degrees C, supply voltage = 150V DC, load = 0.25 mH + 2 ohms. SUPPLY VOLTAGE Minimum supply voltage 24 V DC Typical operating supply voltage 150 V DC Maximum operating supply voltage 155V DC Typical Aux. -
Page 5: Led Indicator
ADJUSTABLE SETTINGS Trimpots : Peak current, Continuous current, Reference gain, Feedback, Tachometer gain, Balance, IR compensation. DIP switches : Load inductance, Voltage feedback, Alternate compensation, Low gain, Flat gain, IR compensation, Normal polarity. LED INDICATOR Normal / Fault Red / Green ( Bicolour) LOGIC INPUTS 74HC levels, active low. -
Page 6: Getting Started
CONNECTORS : SIGNALS AND PINOUTS Motor and power connections are made via a four terminal screw connector ( P2 ). Signal connections are made via a 15 pin 0.1” pitch connector ( P1 ). 4 PIN POWER CONNECTOR P2 PIN 1 : MOTOR OUT +, positive output PIN 2 : MOTOR OUT -, negative output PIN 3 : + HV RETURN and chassis ground PIN 4 : +HV, the high voltage DC power input. -
Page 7: Current Mode
operating in the velocity mode. If no tachometer is used, typically you will be operating in the current mode. In both these modes, the amplifier operates as a current source, and the difference between them is in the setup of the servo preamplifier, the section between the PWM power stage and the input differential amplifier. - Page 8 FRONT PANEL ADJUSTMENT TRIMPOTS REF. GAIN : Attenuates the output of the reference signal gain differential amplifier. Fully CW will send the full reference signal to the servo preamplifier stage. CCW rotation will result in less reference signal sent to the preamp. This adjustment acts like an overall ‘volume’...
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Page 9: Dip Switches
DIP SWITCHES S1,S2 : LOAD INDUCTANCE SELECTOR. Set these two switches based on the inductance of the load and supply voltage. at 75V at 150V 0.13 to 0.75 mH 0.25 to 1.5 mH 0.8 to 5 mH 1.6 to 10 mH 5.1 to 20 mH 10.1 to 40 mH S3 : VOLTAGE FEEDBACK. - Page 10 CONNECTING THE AMP IN CURRENT MODE ( NO TACHOMETER ) Use this checklist for applications that don’t require a tachometer. These include control systems that get their feedback from an encoder, as well as non-motor applications that require a set current from the amplifier in response to the control voltage at the input.
- Page 11 CONNECTING THE AMP IN VELOCITY MODE ( WITH TACHOMETER ) Use this checklist for applications that require velocity mode and a tachometer. 1. Connect DC power supply to the amplifier HV and ground. 2. Ground the amplifier chassis at P2-3. 3.
- Page 12 CONNECTING THE AMP IN VOLTAGE MODE Use this checklist for applications that require velocity mode but no tachometer. IR comp can be used to greatly improve the speed regulation. 1. Connect DC power supply to the amplifier HV and ground. 2.
- Page 13 POWER SUPPLY AND WIRING CONSIDERATIONS 1. Make sure that the applied supply voltage is adequate to drive the motor at maximum current and maximum RPM. This should equal the maximum motor voltage on load, plus saturation losses in the amplifier and an extra 5 to 10 percent for ripple.
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Page 14: Enable Inputs
ENABLE INPUTS The enable inputs may be driven through relay contacts, NPN transistors or sensors, etc. The signals must be low ( pulled to ground ) to enable. The positive and negative enable signals can be used for selective enabling, for example in a linear system to cut off the drive at end-of-travel limits. -
Page 15: Troubleshooting Guide
TROUBLESHOOTING GUIDE Amplifier NORMAL light does not come on. 1. Check that at least between 24V and 150V DC is available at the amp’s DC power input. Increase or decrease supply if outside these limits. 2. Check that the enable signal is low ( active ). Amplifier FAULT light is always on. - Page 16 FEEDBACK BALANCE PEAK I CONT I IR COMP TACH REF GAIN FLT/NORM P1-15 P1-1 OUT + OUT - PWM SERVO AMPLIFIER...
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