Develop high torque dynamics and vector control AC drives VSD for extrusion machines

Item

Features

Excellent Control Performance under Speed Sensorless Vector Control Mode

• Realizing AC motor decoupling, enabling the DC motorization of operation control.
• Fig. 1 indicates the four-quadrant operation of the motor under speed sensorless vector control. The torque, current, speed and DC bus voltage have quick response, and the motor has stable operation.
• Realizing 0.1s acceleration/deceleration with rated motor load.
• Upon the zero-crossing switching of the motor (forward/reverse switching), the current has no phase mutation or oscillation, and the rotating speed has no pulsation.

The bus voltage is under stable control. Quick and reliable braking can be realized when decelerating under the condition of braking without power consumption.

Realizing Real Tripless Operation

• With excellent current and voltage control technology, 0.1s repetitive and alternate acceleration and deceleration is performed, and the inverter realizes stable and tripless operation.
• With extremely powerful loading capacity, the inverter can realize stable tripless operation in any acceleration/deceleration time and under any impact load condition.
• With strong short-time overload capacity, the inverter can operate continuously for 0.5s under 200% rated load, and 1 minute under 150% rated load.
• The intelligent module temperature control maximizes the loading capacity of the inverter.

Unique Instantaneous Mains Failure Reaction

• Upon the instantaneous mains failure, the energy of the motor feedback bus will keep the inverter running till the mains resumes normal.
• When shutdown is caused by long-term power-failure during the operation of the inverter, the inverter will provide alarm message after power resumes normal.
• It supports the automatic operation after power-up.
• The deceleration time during the power failure and the acceleration time after the power recovery can be set independently.

Unique Speed Tracing Function

• It doesn’t need special hardware detection circuit and no special function code to be set. Within the range of 0 to 60Hz, the inverter can complete identification the motor rotating speed, rotating direction and phase angle within 0.2s, and start smooth tracing on the freely rotating motor.
• Tracing mode 1: Quick and smooth tracing on the free speed motor without any impact.
• Tracing mode 2: Impactlessly pull down the motor from high-speed to low speed and then accelerate to normal speed.

Unique Quick DC Braking

• Within the range of 0 to 300Hz, the inverter can realize back electromotive force elimination and quick DC braking within 0.3s.
• DC current input in the most efficient way to improve the braking capacity.
• There is no initial waiting time for the DC braking.
• Special function code of the initial waiting time for DC braking setting is cancelled.

Item

Specification

Input frequency

50/60Hz

Output frequency

0-300Hz

Overload current

150% rated current 1min., 180% 10 sec., 200% 0.5 sec.

Control mode

sensor-less vector control, V/F control

Starting torque

180% 0.5Hz (180% 0.25Hz)

Control precision

±0.05% ( ±0.02%)

Torque precision

±5%

Frequency setting mode

Operation panel setting, terminal UP/DN setting, host computer communication setting, analog setting AI1/AI2/AI3, terminal pulse DI setting

Efficiency

At rated power, 7.5kW and below power class ≥93%, 45kW and below power class ≥95%, 55kW and above power class ≥98%

Frequency setting signal

-10V~+10V; 0~+10V; 0~20mA; 0.2Hz~50kHz

Protection function

Power supply undervoltage, overcurrent protection, overvoltage protection, interference protection, abnormal comparison reference input, auto-tuning failure, module protection, heatsink overtemperature protection, inverter overload protection, motor overload protection, peripheral protection, abnormal current detection, output to ground short circuit, abnormal power failure during operation, abnormal input power, output phase failure, abnormal EEPROM, abnormal relay contact, temperature sampling disconnection, encoder disconnection, abnormal +10V power supply output, abnormal analog input, motor overtemperature (PTC), abnormal communication, abnormal version compatibility, abnormal copying, abnormal expansion card connection, terminal mutual exclusion detection failure, hardware overload protection

Enclosure

IP20

Cooling mode

forced air cooling

Vibration

3.5mm, 2~9Hz; 10 m/s2, 9~200Hz

Ambient temperature / Humidity

-40 Degrees~+70 Degrees / 5~95%Rh (no condensation)