ATOMI specifications
Contents
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
Main functionality
| Function | Description |
|---|---|
| Servo/stepping motor drive | Closed loop control of various types of servo motors by sinusoidal field oriented control with dead-time distortion correction and high dynamic range torque control.
|
| Control modes |
|
| Setpoint types |
See setpoint signal / reference inputs list
|
| Closed loop | Cascaded control loops (PIV):
|
| Feed-forwards | Feed-forwards working in velocity & position control modes:
|
| Homing | Integrated homing function for position control mode:
|
| Feedback devices |
|
| Safety |
|
| Protections |
|
| Power supply |
|
| Motor output current 1 |
|
| Commissioning |
|
| Compliance | CE (LVD & EMC): EN 61800-5-1:2007, IEC 61000-6-1:2005 and IEC 61000-6-3:2006.
Notes:
|
| Reliability |
|
1) Currents achievable continuously only with with sufficient coolant air flow. Without forced cooling, typically 30-45% of the maximum range can be driven continuously. Despite of this, maximum current is available for short periods of time even without cooling. Current is automatically throttled on temperature rise to protect the drive.
Motor output
| 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 |
|
| |
| 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 |
|
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 |
|
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
|
| PWM | ATOMI Advanced only |
|
| 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
| 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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