Inovance MD500

8 Specifications and Model Selection
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Table 8-2 Technical Specications of MD500 Series AC Drive
Item Description
Standard
functions
Input frequency resolution
Digital setting: 0.01 Hz
Analog setting: Max. frequency x 0.025%
Control mode
Sensorless vector control (SVC)
Feedback vector control (FVC)
Voltage/Frequency (V/F) control
Startup torque
0.25 Hz/150% (SVC)
0 Hz/180% (FVC)
Speed range 1:200 (SVC) 1:1000 (FVC)
Speed stability accuracy ±0.5% (SVC) ±0.02% (FVC)
Torque control accuracy ±3% (FVC); ±5% for 5 Hz above (SVC)
Torque boost Customized boost 0.1 % to 30.0 %
V/F curve
Straight-line V/F curve
Multi-point V/F curve
Complete V/F separation
Half V/F separation
Ramp mode
Straight-line ramp
S-curve ramp
Four separate acceleration/deceleration time settings in the range of 0.0s to
6500.0s.
DC injection braking
DC injection braking frequency: 0 Hz to max. frequency
DC injection braking active time: 0.0s to 36.0s.
Current level of DC injection braking: 0.0% to 100.0%.
Jog running
Frequency range of jog running: 0.00 to 50.00 Hz
Acceleration/Deceleration time of jog running:0.0s to 6500.0s
Onboard multiple preset
speeds
The system implements up to 16 speeds by using simple PLC function or by
using digital input signals.
Onboard PID
The system implements the proportionalegral-derivative (PID) function in the
closed-loop control.
Automatic voltage
regulation (AVR)
The system maintains a constant output voltage automatically when the grid
voltage changes through the permissible range.
Overvoltage and
overcurrent stall control
The system limits the output current and voltage automatically during
operation to prevent frequent or excessive trips.
Overcurrent fast
prevention
The function helps to avoid frequent overcurrent faults.
Torque limit and control
The system limits the torque automatically to prevent frequent overcurrent
tripping during operation.
Torque control is applied in vector control.