Transcript
TECHNICAL SPECIFICATIONS DC SERVO AMPLIFIER 1) SUPPLY VOLTAGE Minimum supply voltage Typical operating supply voltage Maximum operating supply voltage Typical Aux. Supply for cooling fan
: : : :
2) OUTPUT POWER a) Peak power output @ 30A, 70V (2 sec unipolar / 4 sec bipolar) : b) Continuous power output @ 15A, 70V : 3) OUTPUT CURRENT a) Peak output current @ Vout = +/-70V (2 sec unipolar / 4 sec bipolar) b) Continuous current @ 50 degrees C ambient
24 V DC 70 V DC 75V DC 220V AC 50Hz 0.2 Amps
2010 W 1050 W
:
+/-30A
:
+/-15A
4) LOAD INDUCTANCE Switch selectable in three ranges, 0.13 to 20 mH @ 75V, 0.25 to 40 mH @ 150V 5) SMALL SIGNAL BANDWIDTH
:
-3dB @ 3 KHz
6) SWITCHING FREQUENCY
:
22 kHz
7) INPUT CHARACTERISTICS Reference input Max. Input voltage Tachometer Max. Tachometer input Input amplifier drift
: Differential, 90 K ohm. min. between inputs : +/-10 volts : Single ended, 21 K ohms : +/-30 volts : 0.05% per degree C
8) OVERCURRENT TIME LIMITS The continuous current limit trim pot setting will affect the time limit at peak output currents as follows: Continuous current setting Time limit, Unidirectional change Time limit, Bidirectional change 9) GAINS Input differential amplifier Servo preamplifier
15A 2 4
10A 1.5 3
5A 1 2
: :
1.0 Adjustable
sec sec
Power amplifier stage Current monitor
: :
2 A/V 5.0 A/V
10) ADJUSTABLE SETTINGS Trim pots to be provided for: Peak current, Continuous current, Reference gain, Feedback, Tachometer gain, Balance, IR compensation. DIP switches to be provided for: Load inductance, Voltage feedback, Alternate compensation, Low gain, Flat gain, IR compensation, Normal polarity. 11) LED INDICATOR FOR INCICATION OF Normal / Fault condition : Red / Green (Bicolor) 12) LOGIC INPUTS: Enable Positive Enable Negative Enable Reset -
74HC levels, active low. Low to enable amplifier Low to enable + output Low to enable – output Low to reset fault
13) LOGIC OUTPUTS (To indicate Normal/Fault Conditions) Normal : Open drain MOSFET output, 100 mA / 50V Selectable switch open : Low when normal, high on fault condition Selectable switch closed : High when normal, Low on fault condition Overcurrent : CMOS 5V output 14) AUXILIARY OUTPUTS +/- 12 V/10 mA max. 15) PROTECTION FEATURES REQUIRED FOR Current v/s. time limiting 2 secs max @ +/-30A Heat sink temp. limit 83 degrees C Over-voltage shutdown 75V Under voltage shutdown 22 V Output short circuit Output-output, output-Ground 16) THERMAL REQUIREMENTS Maximum ambient temperature Maximum power dissipation
50 degrees C 30W @ +/- 7.5 Amps
17) MECHANICAL The Servo amplifier has to be housed in a 6-U Standard Euro rack with internal dimensions as 17×14×10 (inches). Appropriate heat sinking and ventilation for the Servo System should be provided.
18) MISCELLANEOUS REQUIREMENTS: a) All Servo Setting Adjustments to be provided in front panel. b) All Servo Interface signals to be provided in rear panel.
c)
Motor and Tachometer connections have to be provided on front as well as rear panels respectively. On front panel, the connections have to be given on BANANA connectors, while on rear panel, connections have to be given on 4 pin circular MIL type connector (Type MS3102R 14S-2S Female Box mounting receptacle) with pin configurations as follows: Pin
Connection
A B C D
Motor + (Positive) Motor – (Negative) Tachometer+ (Positive) Tachometer – (Negative)
The counterpart of the connector (corresponding Male plug has also to be supplied). d) e) f) g) h)
Series inductor for Motor, which can drive low inertia, low inductance motors. Indication Lamps for Input Power ON and Servo Supply. Safety Circuit Brakers for Motor Supply, Motor Output. Motor Current Display on front panel. Unregulated DC Power Supply Rated 70V DC, 15A.
