compact, efficient, dynamic - optimized! - edrive … mf inverter motor we present the inverter...

Lenze MF Inverter Motor

We present

the Inverter MotorCompact, Efficient, Dynamic - Optimized!

L-forceLenze Inverter Motor


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ƒ Standard AC motors: – Optimized for mains operation (nominal frequency: 50/60Hz)– For inverter operation with special isolated windings

ƒ Servo motors: – Optimized for high performance servo applications

Costs

Inverter operationMains operation Servo operation

Performance

„Think out of the box“ – fill the void!

Inverter operation



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ƒ Inverter Duty Motors: – Optimized for inverter duty– Basis: Classical AC motor– Not suitable for mains operation

Performance

Costs

Mains operation Servo operation

„Think out of the box“ – Develop an Inverter Duty Motor!

NEW

Inverter operation



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Standard AC Motor

ƒ Designed for across the line starting

ƒ Designed for use at normal speed

ƒ 3:1 speed range

ƒ Designed for continuous duty

ƒ Torque drops off after 60 Hz

ƒ Not Compact



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Synchronous Servo Motor

ƒ Higher Efficiency

ƒ More Compact

ƒ Lower inertia

ƒ Field weakening range is smaller

ƒ High Power density

ƒ Low Field Weakening



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Asynchronous Servo Motor

ƒ Low Inertia

ƒ Designed for high dynamic applications

ƒ Better balanced for highest speeds

ƒ High Dynamic response

ƒ Very High Overload capacity

ƒ High Power Density

ƒ High Field Weakening



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New Inverter Optimized Motor

ƒ 24:1 Speed range w/o field weakening

ƒ 1 to 2 frame sizes smaller than standard motor

ƒ 4 pole motor optimized for 120 hz operation

ƒ Designed for variable speed applications

ƒ High Dynamic Response

ƒ High Field weakening

ƒ High power density



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NEMA AC Motor

Inverter Optimized

MotorSynchronous Servo Motor

Asynchronous Servo Motor

Dynamic Response

Average High Very High High

Mass Inertia Average Low Very Low LowOverload Capacity

Average High Very High Very High

Power Density

Average High Very High High

Field Weakening

Average High Low High

Encoder N/A Inc Encoder

Resolver

SIN/COS Enc

Absolute Enc

Inc Encoder

Resolver

SIN/COS Enc

Absolute Enc

Inc Encoder

Resolver

SIN/COS Enc

Absolute Enc



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Performance

Torque

Frequency(≈ speed)

Frequency

Frequency

Voltage

Power

60 Hz≈20 Hz

Nominal torque

Max. torque

60 Hz

60 Hz

120 Hz

120 Hz

120 Hz

Y400V ∆230V

AC motor (60Hz)

L-force AC motor MF



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Construction

Bearing: from servo motors (HT-grease)

Terminal box: Adjustment of clamping bolts (higher ampacity)

Shaft sealing: Material FKM (Viton) with reduced spring force



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Nominal power kW (HP) IE1 (Std) IE2 (Std) MF

0.55 (0.74) 71 630.75 (1.0) 80 80 631.10 (1.5) 80 90 711.50 (2.0) 90 90 712.20 (3.0) 100 100 803.00 (4.0) 100 100 804.00 (5.4) 112 112 905.50 (7.4) 112 132 100

7.50 (10.0) 132 132 10011.00 (14.7) 160 160 11215.00 (20.1) 160 160 13218.50 (25.0) 180 180 13222.00 (30.0) 180 180 132

Benefits: Compact and dynamic

ƒ Up to 2 sizes smaller than an IE2-motor of the same power

ƒ Highly dynamic due to its low inertia

Comparison of shaft height per motor power



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Your benefits: Flexible due to a wide speed setting range

ƒ Wide speed setting range of 1:24 (without field weakening)

ƒ Full torque over a broad speed range – also without a separate fan

1560 150

M2 [Nm]

n2 [r/min]256

IE2-geared motor (4-poled) with ratio i=10 • With integrated fan: The torque must be reduced

below 60 r/min• Otherwise: Separate fan

Inverter Motor with ratio i=23• Integrated fan: The torque must be reduced below

25 r/min• Separate fan only necessary for constant torque below

25r/min• Increased setting range down to 6 r/min

More flexibility



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ƒ For variable-speed-applications, e.g.:– Turn tables– Storage and retrieval units– Lift tables– Conveyors with lower duty cycle– Pumps/fans– Rapid action doors...

ƒ Space and cost saving alternative to inverter-driven IE2-motors (ErP-directive)

The applications



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Textile machine

ƒ Winding Application

ƒ Customer requirement:– Fulfillment of the efficiency-directive

while using no more space

ƒ Solution:– Inverter Motor

ƒ Success factors:– Compactness: Conventional IE2-motors

are bigger and do not fit in the machine. – A modification of the machine was not

necessary.– Inverter Motors are not affected by the

efficiency-directive.

“Meeting the ErP-directive without a bigger motor size makes the MF-

motor to the perfect solution for the customer.”



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Heavy duty twister

ƒ Winding machine for production of rope yarns and industrial fibers

ƒ Customer requirement:– Fulfillment of the efficiency-directive while

using no more space (e. g. in the USA, EU)

– Compactness

ƒ Success factors:– Robust and small size– Because of ErP these motors would have

been with a bigger volume and there wasn’t space.

– Inverter Motor can be used all over the world.• Especially in USA, where IE3 are

common.

“Optimal solution from one supplier. MF solution can be

used world-wide.”



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Pallet handling systemsƒ Application(s):

– Roll conveyor, chain conveyor, link conveyor, chain slide, lifting table, turntable, turnstile– Periodic duty– Potential of deep freeze

ƒ Customer requirement:– Compactness, variant reduction, decentralized drive technology

ƒ Success factors:– Needed all three motor technologies– Decentralized drive technology

• assembly time reduced by 50% while the total costs stay the same– Generally benefits of a frequency inverter

• soft acceleration and retard for unsecured pallets = gentle handling– Smaller construction volume of the drive packages– Energy-efficiency (Inverter Motors + VFCeco are an economical alternative.)– Wide speed setting range: variant reduction, which causes a reduction of costs for

warehousing and reorders



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High-speed doors for industrial applications

ƒ High-speed doors for parking systems, airport applications and isolating doors

ƒ Customer requirement:– Wide speed setting range– Dynamic

ƒ Success factors:– Wide speed setting range– Well balanced ratio of external and internal

masses (optimal load matching factor)– Optimal cost-performance ratio



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ƒ First projects show great success, e.g.• Intralogistics: Roller conveyor/chain conveyor• Machine building: Rotary indexing table• Gate-manufacturer: Gate-drives• Bakery machines: Filling-drive• Pump motor

ƒ Feedback:– „Significant higher dynamics than a standard motor.“– „Standard motors of the sizes 71..90 can be replaced by

an Inverter motor of size 71, i.e. reduced variance, reduced stocks, larger batches => better price“

– „The Inverter motor can replace a 2-pole standard motor almost 1:1 without big changes of the pump geometry.“

– „The motor fits perfectly to the machine concept due to its features.“

Successful projects



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FAQƒ Why is the nominal voltage lower than 230V/400V?

– Especially at inverter operation, the full mains voltage is sometimes not available at the motor terminals (inverter losses, long cables etc.). Due to this, a small voltage reserve was considered, when the L-force AC motors MF were designed.

– This voltage reserve may also be used for acceleration up to nominal speed (as for a classical servo motor).

– Depending on the motor type, the nominal voltage of the MF-motors varies by a few volts. Cause: The wire number of the motor winding was choosen that the motor will be utilized at the best. This results in an optimal efficiency.



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FAQƒ Why has the permissible torque to be reduced below 20Hz?

– Below 20Hz, the motor and blower speed is so low, that the motorcooling has to be reduced.

– To use the full nominal torque below 20Hz, a seperate fan may be used (available as an option).



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Compactness + Wide speed setting range = Standardizing

ƒ With the wide speed setting range of 1:24, many applications with different speeds can be solved by one geared motor-variant.

ƒ By using a frequency inverter, the speed can be adjusted to the application exactly. Several different gear ratios are not necessary anymore.

ƒ The wide speed setting range results in standardizing. Storage costs and purchasing effort will be reduced.

ƒ Inverter motors provide a significant higher output power than conventional AC motors of the same size.

Required power Conventional AC motor L-force AC motor MF0.7 kW Size 80 (0.75 kW)

071-42 (1.5 kW)1.4 kW Size 90 (1.5 kW)



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Conclusion

ƒ Inverter Motors are the consequent implemented solution for inverter operation.

ƒ Compared to a conventional AC motor, there are lots of benefits:– Compact– Dynamic – Efficient– Global– Flexible– Well priced

Optimize your machine: The „L-force MF“ Inverter Motors give you the choice.

compact, efficient, dynamic - optimized! - edrive … mf inverter motor we present the inverter...

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