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SHENZHEN INVT ELECTRIC CO., LTD. www.invt.com

Introduction INVT MVD for sugar mill application for fibrizer, Chopper & Mill.

Assembly workshop of MVD

INVT CHH100 MVD

Technical features of INVT MVD

outstanding energy

saving effect

outstanding energy

saving effect

High reliabilityHigh reliability

Prefect protection

function

Prefect protection

function

◆ 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.

◆ 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.

◆ Automatically adjust the output voltage according to the load, save more energy for customers.

Bypass for system

and power cell

Bypass for system

and power cell

◆ 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

Speed tracing

and start function

Speed tracing

and start function

Good adaptability

for voltage fluctuation

Good adaptability

for voltage fluctuation

complete parameters

record

complete parameters

record

◆ 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);

◆ 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.

high efficiencyhigh power factor

low harmonics

high efficiencyhigh power factor

low harmonics

◆ Efficiency ≥98 ％ at rating load

◆ Input power factor ≥0.96;

◆ Input & output harmonic ＜ 2 ％

Typical diagram of 690V VFD connectionsTypical diagram of 690V VFD connections

11KV POWER SUPPLY

MVD111KV, 850KW

MVD211KV, 850KW

MVD311KV, 850KW

MVD411KV, 850KW

KM1 KM2 KM3 KM4 KM5 KM6 KM7 KM8

M111KV, 850KW

M211KV, 850KW

M311KV, 850KW

M411KV, 850KW

STANDBY11KV, 850KW

Typical diagram of 11KV MVD connectionsTypical diagram of 11KV MVD connections

690V, VFD

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

11KV, MVD

VFD comparisonVFD comparison

Adopt multi-power cell parallel connection technology, Input & Output harmonic less than 2%

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 very high, which may cause current shock for grid

The starting current is low, reduce the current shock for the grid

The starting current is low, reduce the current shock for the grid

Additional transformer is unnecessaryAdditional transformer is unnecessary

The system can be bypassedThe system can be bypassedThe system can not be bypassedThe system can not be bypassed

690V, VFD

For output side, consider the dv/dt problem, output reactor or filter is recommended

The output cable length is limited

11KV, MVD

VFD comparisonVFD comparison

The output cable length without any limitation. Beneficial to system expansion

The output cable length without any limitation. Beneficial to system expansion

The system is difficult for maintenance The system is difficult for maintenance

The system is modularized structure, it easy for maintenance The system is modularized structure, it easy for maintenance

The output reactor and filter is unnecessaryThe output reactor and filter is unnecessary

The operation interface is not friendly for customer. The operation interface is not friendly for customer.

HMI is used, the system is easy to be operated and monitored,

the interface is more friendly.

HMI is used, the system is easy to be operated and monitored,

the interface is more friendly.

690V, motor

Volume of the motor is big

The output current is big, the cross section of cable should be big, wiring connection is difficult.

11KV, motor

Motor comparisonMotor comparison

The output current is small, big cross section of cable is unnecessary, wiring connection is easy.

The output current is small, big cross section of cable is unnecessary, wiring connection is easy.

Copper loss of motor is bigCopper loss of motor is big Copper loss of motor is small Copper loss of motor is small

Volume of the motor is smallVolume of the motor is small

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Thank you!

INVT always aim to be your mutual benefit partner and

professional drive solution provider.