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In novation

In novation. V alue. T eamwork. SHENZHEN INVT ELECTRIC CO., LTD. www.invt.com. Introduction INVT MVD for sugar mill application for fibrizer, Chopper & Mill. INVT CHH100 MVD. Assembly workshop of MVD. ◆ Double power supply redundant design for control system;

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In novation

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  1. Innovation Value Teamwork SHENZHEN INVT ELECTRIC CO., LTD. www.invt.com

  2. Introduction INVT MVD for sugar millapplication for fibrizer, Chopper & Mill.

  3. INVT CHH100 MVD Assembly workshop of MVD

  4. ◆ Double power supply redundant design for control system; ◆ Abundant power unit monitor function, detect the power unit temperature, DC bus voltage, adjust system in advance to prevent failure. High reliability ◆11 kinds power cell fault protection function; ◆ More than 20 kinds protection for inverter and motor; ◆ Protection threshold can be adjusted according to working conditions. outstanding energy saving effect Prefect protection function Bypass for system and power cell ◆ Automatically adjust the output voltage according to the load, save more energy for customers. ◆ Auto-switching between power frequency and variable frequency technology; ◆ bypass the fault power cell in 200ms, will not cause MVD stop; ◆ synchronous switchover technology, switching the system between power frequency and variable frequency smoothly Technical features of INVT MVD

  5. ◆ Efficiency ≥98％ at rating load ◆ Input power factor ≥0.96; ◆Input & output harmonic＜2％ high efficiency high power factor low harmonics Good adaptability for voltage fluctuation ◆The MVD can output 100% torque while the voltage fluctuation range is ±10%; ◆MVD run derating without protection when input voltage dropping to 65% rated voltage at short time (30s); Speed tracing and start function complete parameters record ◆ Indicate multi-parameters in running status, temperature of each module, DC bus detection and indication, provide with fault indication, record and self-diagnostic function. ◆When the instantaneous power off, the MVD can be started smoothly by speed tracing function; ◆ the system can be switched from power frequency to variable frequency smoothly.

  6. Typical diagram of 690V VFD connections

  7. Typical diagram of 11KV MVD connections

  8. 690V, VFD 11KV, MVD It needs additional step-down transformer, the cable length will be longer, and the transformer cause energy lose, which adds cost. The harmonic distortion is very high, which calls for additional electric devices like EMC filters and harmonic filters VFD comparison Additional transformer is unnecessary Adopt multi-power cell parallel connection technology, Input & Output harmonic less than 2% The starting current is very high, which may cause current shock for grid The starting current is low, reduce the current shock for the grid The system can not be bypassed The system can be bypassed

  9. 690V, VFD 11KV, MVD For output side, consider the dv/dt problem, output reactor or filter is recommended The output cable length is limited VFD comparison The output reactor and filter is unnecessary The output cable length without any limitation. Beneficial to system expansion The system is difficult for maintenance The system is modularized structure, it easy for maintenance HMI is used, the system is easy to be operated and monitored, the interface is more friendly. The operation interface is not friendly for customer.

  10. 690V, motor 11KV, motor Volume of the motor is big The output current is big, the cross section of cable should be big, wiring connection is difficult. Motor comparison Volume of the motor is small The output current is small, big cross section of cable is unnecessary, wiring connection is easy. Copper loss of motor is big Copper loss of motor is small

  11. Thank you! INVT always aim to be your mutual benefit partner and professional drive solution provider. 2020/1/5 11

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