Solution

Application case of NiMotion integrated motor on syringe pump
Release Date : 2018-11-16 13:54:28


Microinjection pump technical indicators:

Number of channels: 2
                       Maximum stroke: 140mm
                       Stroke resolution: 0.03125μm
                       Line speed range: 1μm/min-13mm/min (flow rate = line speed × cross-sectional area inside the syringe)
                       Line speed adjustment resolution: 1μm/min
                       Stroke control accuracy: error ≤ ± 0.5% (stroke ≥ 30% of the maximum stroke)
                       Rated linear thrust: >290N
                       Syringe selection: built-in main manufacturer, main model syringe for selection
                       Syringe customization: can be directly input into the syringe
                       Flow Correction: Get a more accurate volume through the calibration procedure
                       Operating parameter settings: dispense liquid volume, injection time, etc.
                       Display parameter selection: volume, flow or line speed
                       Power-down memory: After power-on, you can choose whether to continue working according to the state before power-off.
                       Communication interface: CANopen communication Subdivision: Maximum support 256 subdivision
                       Dimensions: 280 × 210 × 140 (mm)
                       Use power: DC24V/15W
                       Working environment temperature: 0°C-40°C
                       Working environment relative humidity: <80%



NiMotion integrated motor FOC control:

NiMotion integrated motor adopts FOC or field oriented control, also known as vector frequency conversion, which is the best choice for efficient control of brushless DC motor (BLDC) and permanent magnet synchronous motor (PMSM). The FOC selects a rotating magnetic field axis of the motor as a specific synchronous rotating coordinate axis. There are three types of magnetic field orientation axes: rotor field orientation, air gap field orientation and stator field orientation; air gap field orientation and stator field orientation are coupled in the flux linkage relationship, making the vector control structure more complex; rotor field orientation is modeled The control method of the DC motor uses the means of coordinate transformation to decompose the stator current of the AC motor into a magnetic field component current (corresponding to the excitation current) and a torque component current (corresponding to the load current) and control them separately, that is, the magnetic flux current component. Both the torque and current components are completely decoupled, resulting in dynamic performance similar to that of a DC speed control system. The FOC precisely controls the magnitude and direction of the magnetic field to make the motor. Smooth torque, low noise, high efficiency, and high-speed dynamic response. Due to the obvious advantages of FOC, it has gradually replaced traditional control methods in many applications and has attracted much attention in the motion control industry. 







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