Difference between revisions of "ATOMI specifications"

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(→‎Setpoint signal / reference inputs)
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! [[Setpoint signal]] type !! Status || Electrical interface
 
! [[Setpoint signal]] type !! Status || Electrical interface
 
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| [[Analog setpoint|Analog]]  || Standard feature || *Up to +/-10V or any lower voltage range *+/-10V (bipolar) and 0-10V with polarity input (unipolar) supported
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| [[Analog setpoint|Analog]]  || ATOMI Advanced only || 0 - 3.3 V input signal. External circuitry needed for ±10 V operation.
 
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| [[Pulse and direction]] || Standard feature ||  
 
| [[Pulse and direction]] || Standard feature ||  
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*ATOMI Advanced: 8 MHz
 
*ATOMI Advanced: 8 MHz
 
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| [[Quadrature]] || Standard feature ||
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| [[PWM]] || ATOMI Advanced only ||  
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Maximum quadrature frequency (count rate)
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*ATOMI DeepStep and Standard: 1 MHz (4 MHz)
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*ATOMI Advanced: 2 MHz (8 MHz)
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| [[PWM]] || Standard feature ||  
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*1-30 kHz PWM carrier frequency (f<sub>PWM</sub>), ~3 kHz for optimal operation.
 
*1-30 kHz PWM carrier frequency (f<sub>PWM</sub>), ~3 kHz for optimal operation.
 
*Single signal (no polarity input), zero setpoint at 50% duty
 
*Single signal (no polarity input), zero setpoint at 50% duty
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*PWM+Polarity input mode
 
*PWM+Polarity input mode
 
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| Serial communication || Standard feature || [[SimpleMotion V2]] real-time serial bus with open source SDK. Connect through RS485 or USB.
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| Serial communication || Standard feature || [[SimpleMotion V2]] real-time serial bus with open source SDK. Connect through USB.
 
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| EtherCAT || Planned || Realized with add-on board
 
| EtherCAT || Planned || Realized with add-on board

Revision as of 10:22, 2 June 2017

Device variations

ATOMI is available in three different models. See also ATOMI device model comparison.

ATOMI DeepStep
Basic model for stepper motor operation only
ATOMI Standard
Additional features and supported motor types
ATOMI Advanced
Most features

Motor output

Maximum output current throttling vs device temperature. Current is automatically reduced by device to protect from overheating.
Property Value Units Remarks
Supported motors Refer to ATOMI device model comparison page Permanent magnet motors only
Continuous output current 0-8 1 A (peak value of sine) User settable limit
Maximum effective motor phase output voltage
  • 3-phase AC motors: Vsupply*0.671 V RMS (phase-to-phase)
  • DC motors: Vsupply*0.95 VDC
  • I.e. at 48V supply, the maximum three-phase motor output voltage is 32.2 V RMS phase-to-phase
  • I.e. at 48V supply, the maximum DC motor output voltage is 45.6 V
Switching frequency 20.0 kHz
Maximum modulation depth 95  % Maximum effective output is 95% of HV DC bus voltage.
Torque control bandwidth (typ.) 1-3.3 kHz Motor coil dependent
Torque control cycle time 50.0 µs
Position & velocity control cycle time 400 µs
Power conversion efficiency 93-97  % Under typical conditions
Motor inductance range @ 48 VDC 0.2-25 mH
Motor inductance range @ 24 VDC 0.1-25 mH
Motor power range 0.01 - 0.5 kW
AC commutation frequency 0-400 Hz Not capped, may achieve up to 2 kHz

1) Maximum current is obtainable only for short periods without active air cooling. Drive automatically throttles current limit if drive temperature rises beyond 75 Celsius. Output current capacity reduces linearly between 75 and 90 degrees Celsius from the maximum to zero.

Regenerative resistor

ATOMI has an on-board 15 Ohm 11 Watt regenerative resistor.

Feedback devices

ATOMI supports quadradure (incremental) encoders with single-ended 3-5.5V (CMOS, TTL, open collector).

Quadrature encoder electrical properties

Property Value Units Remarks
Encoder count rate
  • ATOMI DeepStep and Standard: 0-4
  • ATOMI Advanced: 0-18
MHz After 4x decoding, digitally filtered
Supply voltage 4.8-5.2 V Supplied externally (can share same voltage with drive logic supply)
Encoder resolution
  • ATOMI DeepStep and Standard: 100-65535
  • ATOMI Advanced: 100-15000000
 Pulses per revolution (P/R)

Setpoint signal / reference inputs

Setpoint signal type Status Electrical interface
Analog ATOMI Advanced only 0 - 3.3 V input signal. External circuitry needed for ±10 V operation.
Pulse and direction Standard feature

Maximum step rate

  • ATOMI DeepStep and Standard: 4 MHz
  • ATOMI Advanced: 8 MHz
PWM ATOMI Advanced only
  • 1-30 kHz PWM carrier frequency (fPWM), ~3 kHz for optimal operation.
  • Single signal (no polarity input), zero setpoint at 50% duty
  • PWM signal is sampled at 60MHz timer thus reading resolution is 60MHz/fPWM
  • PWM+Polarity input mode
Serial communication Standard feature SimpleMotion V2 real-time serial bus with open source SDK. Connect through USB.
EtherCAT Planned Realized with add-on board

See also:

Mechanical

Dimension drawing
Property Value Units
Dimensions 160 × TBA (~17) × 91 (W×H×D) mm
Weight TBA kg
Drawings TBA PDF/IGES/STEP

Note: all mounting holes are 3.2 mm diameter.

Electrical

Power supply

Input voltage Input current when idle Input current max
12 - 49 VDC Typically < 0.4 A Depends on total power output.

Note: ATOMI doesn't have an input diode for reverse input voltage protection (needed for some switching power supplies).

I/O

Please see ATOMI connectors and pinouts.

Environment

Property Value Units
Operating temperature 10 - 70 °C
Storage temperature -30 - 90 °C
Humidity 0 - 95 non-condensing  %

Warnings

Exceeding ratings may affect drive operation and cause instability or even damage the drive or other equipment. Damaged equipment may pose danger to users.
Specifications are subject to change without notice
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