Advanced motion controls b15a20
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The document describes the B15A series of brushless servo amplifiers. It provides specifications for three models (B12A6, B15A8, B15A20) including voltage ratings, current limits, switching frequency and dimensions. It also details features, operating modes, pin functions, setup instructions and ordering information.
Advanced motion controls b15a20
- 1. B15A Series B15A SERIES BRUSHLESS SERVO AMPLIFIERS Models: B12A6, B15A8, B15A20 FEATURES: • Surface-mount technology • Small size, low cost, ease of use • DIP switch selectable: current, open loop, or tachometer velocity mode • Four quadrant regenerative operation • Agency Approvals: BLOCK DIAGRAM Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
- 2. B15A Series DESCRIPTION: The B15A Series PWM servo amplifiers are designed to drive brushless DC motors at a high switching frequency. A single red/green LED indicates operating status. B15A Series amplifiers are fully protected against over-voltage, over-current, over-heating and short-circuits. They interface with a digital controller or can be used as a stand-alone drive. This model requires only a single unregulated DC power supply. Loop gain, current limit, input gain and offset can be adjusted using 14-turn potentiometers. The offset adjusting potentiometer can also be used as an on-board input signal for testing purposes, when SW4 (DIP switch) is ON. SPECIFICATIONS: MODELS POWER STAGE SPECIFICATIONS B12A6 B15A8 B15A20* DC SUPPLY VOLTAGE 20-60 V 20-80 V 40-190 V PEAK CURRENT (2 sec. maximum) ± 12 A ± 15 A ± 15 A MAXIMUM CONTINUOUS CURRENT ± 6 A ± 7.5 A ± 7.5 A MINIMUM LOAD INDUCTANCE** 200 μH 200 μH 250 μH SWITCHING FREQUENCY 33 kHz ± 15% HEATSINK (BASE) TEMPERATURE RANGE -25° to + 65° C, disables if > 65°C POWER DISSIPATION AT CONTINUOUS CURRENT 18 W 30 W 75 W OVER-VOLTAGE SHUT-DOWN (self reset) 62 V 86 V 195 V BANDWIDTH (load dependent) 2.5 kHz 2.5 kHz 2.5 kHz MECHANICAL SPECIFICATIONS POWER CONNECTOR Screw terminals SIGNAL CONNECTOR Molex connector SIZE 5.09 x 2.98 x 0.99 inches 129.3 x 75.8 x 25.1 mm WEIGHT 10 oz. 0.28 kg *Contact factory regarding CE rating. ** Low inductance motors require external inductors. Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
- 3. B15A Series PIN FUNCTIONS: CONNECTOR PIN NAME DESCRIPTION / NOTES I/O 1 MOTOR A Motor phase A connection O 2 MOTOR B Motor phase B connection O 3 MOTOR C Motor phase C connection O 4 POWER GND Power ground GND P2 5 HIGH VOLTAGE DC power input I 1 +10V @ 3 mA OUT For customer use O 2 SIGNAL GND Reference ground GND 3 -10V @ 3 mA OUT For customer use O 4 +REF IN Differential reference input, maximum ±15 V, 40K input resistance I 5 -REF IN 6 -TACH IN Tachometer input, max. ±60 VDC, 60K input resistance I 7 +TACH / GND Ground GND 8 CURRENT MONITOR OUT Current monitor. 1 V = 2 A O 9 INHIBIT IN This TTL level input signal turns off all power devices of the “H” bridge when pulled to ground. This inhibit will cause a fault condition and a red led. For inverted inhibit inputs, see section "G". I 10 +V HALL OUT Power for HALL sensors, short circuit protected, O +6 V @ +30 mA. 11 GND GND 12 HALL 1 13 HALL 2 14 HALL 3 HALL sensor inputs, TTL logic levels, internal 5 KΩ pull-up. Maximum low level input is 1.5 V, minimum high level input is 3.5 V I 15 CURRENT REFERENCE OUT Monitors the input signal connected directly to the internal current amplifier. 7.25 V = max current. See current limit adjustment information below. O P1 16 FAULT OUT (red LED) TTL level output. Becomes high during output short circuit, over-voltage, inhibit, over-temperature and during power-on reset. Fault condition indicated by red LED. O Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
- 4. B15A Series SWITCH FUNCTIONS: SETTING SWITCH FUNCTION DESCRIPTION ON OFF 1 Duty-cycle feedback Open Loop No Effect 2 60 / 120 degree commutation phasing setting 120 degree 60 degree 3 Loop integrator. This capacitor normally ensures "error-free" operation in velocity mode by reducing the error-signal (output of summing amplifier) to zero. Shorts out the velocity / voltage loop integrator capacitor. Velocity / voltage loop integrator capacitor operating. 4 Test / Offset. Sensitivity of the "offset" pot. Used as an on-board reference signal in test mode. Test Offset POTENTIOMETER FUNCTIONS: POTENTIOMETER DESCRIPTION TURNING CW Pot 1 Loop gain adjustment in open loop & velocity modes. Increases loop gain Pot 2 Current limit. It adjusts both continuous and peak current limit while maintaining their ratio (50%). Increases current limit Pot 3 Reference gain. It adjusts the ratio between input signal and output variables (voltage, current, velocity). Increases reference input gain Pot 4 Test / Offset. Used to adjust any imbalance in the input signal or in the amplifier. When SW4 (DIP switch) is ON, the sensitivity of this pot is greatly increased thus it can be used as an on-board signal source for testing purposes. See section “G”. N/A Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
- 5. B15A Series OPERATING MODE SELECTION: These modes can be selected by the DIP switches according to the chart in the functional block diagram: • Current mode • Open loop mode • Tachometer mode See section "G" for more information. SET-UP: See section "G" for engineering and installation notes. CURRENT LIMIT ADJUSTMENTS: These amplifiers feature peak and continuous current limit adjustments. Potentiometer 2, the current limiting potentiometer, has 12 active turns plus 1 inactive turn at each end and is approximately linear. Thus, to adjust the current limit turn the potentiometer counter-clockwise to zero, then turn clockwise to the appropriate value. P1-15 is the input to the internal current amplifier stage. Since the output current is proportional to P1-15, the adjusted current limit can easily be observed at this pin without connecting the motor. Note that a command signal must be applied to the reference inputs to obtain a reading on P1-15. The maximum peak current value equals 7.25 V at this pin and the maximum continuous current value equals 3.625 at this pin. Example: Using the B12A6, 7.25V=12A. The actual current can be monitored at pin P1-8. TYPICAL SYSTEM WIRING: see section "G". ORDERING INFORMATION: Models: B12A6X, B15A8X, B15A20X X indicates the current revision letter. MOUNTING DIMENSIONS: See page F-7. Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com