ITG gearless machines for elevator, homelift and freight elevator
GEARLESS MACHINES
ITG gearless machines
Small, with smooth operations like silk and boasting a really high energy efficiency.
The ITG gearless machines for elevator react smoothly to every impulse they receive, because their 24 or 32 pole motors have been designed for having the lowest torque ripple and the outmost efficiency. Discover all the models of the large range of ITG gearless machines, you will see that each of them has unique and unusual features.
ITG geared machines
All ITG geared machines, whatever their application, ensure the highest level of safety and reliability. They have been designed to last a long time and are tested, one by one, with complete and advanced control instruments that allow to verify the efficiency of each single phase of the electric motor in addition to the average one, the speed of rotation of the motor, its electrical absorption, the efficiency of the motor and the overall efficiency of the machine, the control of the correct operation of the brake and its current absorption and sound level.
Each ITG geared elevator machine leaves the assembly line only if the vibration level does not exceed 0.6mm / second square. To better understand this value, we invite you to check the vibration level of other machines.
Finally, each geared ITG machine leaves the assembly line with the brake perfectly adjusted and the adjustment position marked.
Gearless machines for elevator
Browse in order to discover the ITG gearless machines. Press the buttons
ITG 01
ITG 02
ITG 03
ITG 04
ITG 05
ITG 06
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The product philosophy
All the ITG gearless machines have been designed following the same, stringent, product philosophy. This information is not intended to be
an exhaustive description of the technical design of the ITG gearless machines, but to provide only a few details about the technical choices that have been followed for their design.
All the ITG gearless machines are equipped by Radial Flux synchronous PM motors. Radial flux PM synchronous machines (RFPM) are the most conventional PM machines, and are widely used in many Industries. In a RFPM machine the electromagnetic flux flows radially in the machine, while the current flows in the axial direction.
The "inset" PM motor design retaining the advantages of the SMPM design
All the ITG gearless machines for elevator are all of the inset PM motor design.
As the standard Surface Mounted PM machines (SMPM), the inset PM machines have permanent magnets mounted on the rotor surface, but the gaps between the permanent magnets are however partially filled with steel. The steel between the permanent magnets creates a saliency and gives a reluctance torque in addition to the torque from the magnets. The reluctance torque of the inset PM motor design contributes around 5 % to the required nominal torque. This allows a lighter stator, and determines the reason why the inset PM motor can be lighter than the SMPM motor. This notwithstanding, the inset PM motors can have other potential weaks if the dimension of the steel between the magnets is not properly designed accordinlgy also to the poles number, and for this reason, at ITG we do this by using sophisticated FEM methods, with the goal to retain the advantages of both the SMPM and inset motors design.
Finally, the magnets of the ITG gearless machines are not only glued to the rotors, but they are also mechanically fixed to them, so to make sure that they will never detach, under no circumstances.
The high number of poles
Despite the number of permanent magnets and the production cost increase with a higher pole number, and therefore it is normally found a compromise between the weight and the number of magnets, the technical configuration of the ITG gearless machines is always based on the 24 or 32 pole design, since the higher the pole number, the lower the torque ripple, because the torque ripple varies between different configurations and pole numbers.
In order to further decrease the torque ripple (which can also jeopardise the working lifetime of the motor) the ITG gearless machines are all designed with skewing, which is an additional way to decrease the torque ripple.
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Vibrations free
ITG has developed its own technology to ensure a constant air gap between the rotor and stator of the electric motor, which allows the manufacturing of vibration-free gearless machines with homogeneous performance.
As always, the control of PM motors requires experience and the use of good quality inverters capable of delivering the right voltage and the right current, because if exceeding, they would compromise the silence of the machine.
Precisely for this reason, at ITG we can supply the gearless machine for the lift and also the pre-calibrated inverter to drive it at its best.
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Gearless machine for elevator ITG 01
The ITG 01 is a versatile range of gearless hoisting machines designed for payloads included between 320 and 550 Kg, with specific versions designed for 1:1 and 2:1 roping.
Equipped with traction sheaves having the diameter of 200, 210, 240 and 320mm, the ITG 01 variants are available for speeds varying from 0,5 up to 2 metres per second.
Accordingly to the specific variants, the static load of the ITG 01 range is included from 1.750 kg. up to 1950 kg in all directions in 1:1 roping, and therefore up to 3.900 Kg in 2:1 roping.
Thanks to the SmCo magnets, the ITG 01 range or products produces the best performance also with high working temperatures, and its magnets are not prone to oxidate over the time and loose performance.
The 24 pole permanent magnet motor assures the best possible performance and the most compact dimensions.
The widht of the ITG 01 is reduced down to 271 millimetres. This allows to have a larger cabin within a standard shaft, which means for a load of 550 rather than the standard 480 Kg.
The reduced dimensions of the ITG 01 facilitate the easier installation of the machine
Flexibility of installation
The compact dimensions of the ITG 01 gearless machine for elevators facilitate its installation in any MRL elevator system.
Thanks to the specific bedplates, it can be easily installed also in systems with machine room and 1: 1 roping
Package with inverter
The gearless machines for elevator ITG 01 have been designed to provide the best possible efficiency, which can be achieved only by using an inverter up to the job and capable to deliver also very reduced currents.
ITG can supply the complete package, made of the machine and the inverter, specifically tuned up for the supplied machine
Technical selection and configuration software
ITG Customers may avail themselves of the "ITG Configuration Wizard" software which allows to upload the complete data of the elevator system and provides a selection of the suitable gearless ITG machines. It also provides the comparison between the machine nameplate data and actual values provided in the lift system, in addition to the calculations relating to the safety and traction of the ropes, the space for emergency braking and the operating cost for electricity and the efficiency class
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Elevator gearless machine
ITG 02: a cashbox of versatile solutions
The ITG 02 is a versatile range of gearless hoisting machines for elevator designed for payloads included between 450 and 800 kg, with specific versions designed for 1:1 and 2:1 roping.
Equipped with traction sheaves having the diameter of 200, 210, 240 and 320mm, the ITG 02 variants are available for speeds varying from 0,5 up to 2 metres per second.
Accordingly to the specific variants, the static load of the ITG 02 range is included from 1.750 kg. up to 1.950 kg in all directions.
Thanks to the SmCo magnets, the ITG 02 range of gearless machines for elevator produces the best performance also with high working temperatures, and its magnets are not prone to rust over the time.
The 24 pole motor assures the best possible performance with the most compact dimensions to each one of the countless versions of the gearless machines for elevator ITG 02.
The "Curén" ventilated versions allow you to combine the smallest dimensions with the highest efficiency.
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Gearless hoisting machine
ITG 03
The ITG 03 is a sophisticated range of gearless hoisting machines designed for payloads included between 630 and 1000 kg, with specific versions designed for 1:1 roping.
Equipped with traction sheaves having the diameter of 200, 240, 320 and 400 mm, the ITG 03 variants are available for speeds varying from 0,5 up to 2,0 metres per second.
The static load of the ITG 03 is of 3.500 kg. in all directions.
Thanks to the SmCo magnets, the ITG 03 range or products produces the best performance also with high working temperatures, and its magnets are not prone to rust over the time.
The 32 pole motor assures the best possible performance with the most compact dimensions, and the width of the ITG 03 is only 320mm.
The "Curén" ventilated versions allow you to combine the smallest dimensions with the highest efficiency.
Gearless hoisting machine
ITG 04
The gearless machine for elevator ITG 04 is the natural development of the range for higher payload rates than previous models, since it has been designed for payload varying from 800 up to 1600 kg, in 2:1 roping, in addition to the several variants designed for 1:1 roping.
Equipped with traction sheaves having the diameter up to 500 mm, the ITG 04 variants are available for speeds varying from 0,5 up to 2,0 metres per second.
The static load of the ITG 04 is of 3.500 kg. in all directions.
As the other ITG gearless machines, thanks to the SmCo magnets, the geartless machine ITG 04 range or products produces the best performance also with high working temperatures, and its magnets are not prone to rust over the time.
The 32 and 34 pole PM motor assures the best possible performance with the most compact dimensions, and the width of the ITG 04 is only 320mm.
The "Curén" ventilated versions allow you to combine the smallest dimensions with the highest efficiency.
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High polarity for the smoother motion
The high polarity of the gearless machines for elevator ITG 03 and ITG, perfectly combined to the number of slots of their stators, assures the minimum possible torque ripple and cogging, for the best possbile and the smoothest motion of the motor
Efficient cooling
The widely finned cast iron casing of the ITG 03 and ITG 04 gearless traction units have excellent heat dissipation properties, promoting optimal heat exchange and avoiding overheating even in the most demanding conditions.
The "Curén" versions have an apron unit with one or at most two fans to force the air on the device for those installations in which the motor rotation speed is very low, also in function of large diameter traction sheaves. However, ITG gearless machines are never characterized by a variety of cooling fans, which often hide a deficiency in the magnetic mass that would be really necessary for optimal engine operation at the correct temperature
Efficiency
Like all the other ITG gearless traction units, the ITG 03 and ITG 04 models are also characterized by a specific mechanical machining of the already wound motors which ensure the constant air gap between the rotor and the stator, to ensure the best energy efficiency, homogeneity of the performances in the machines produced and their low noise
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Gearless hoisting machine ITG 05
The ITG 05 is a range on its own of gearless machines for elevators tailored for payloads included between 630 and 1000 kg., and although being visually similar to the ITG 03 and ITG 04 gearless machines, the ITG 05 machines have totally different and specific PM motors.
Equipped with traction sheaves having the diameter of 210, 240, 320 and 400 mm, the varaints of the gearless machine ITG 05 are available for speeds varying from 0,5 up to 2,0 metres per second.
The static load of the ITG 05 is of 3.200 kg. in all directions.
Thanks to the SmCo magnets, the ITG 05 range or products produces the best performance also with high working temperatures, and its magnets are not prone to rust over the time.
The 32 pole motor assures the best possible performance with the most compact dimensions, and the width of the ITG 05 is only 320mm.
The "Curén" ventilated versions allow you to combine the smallest dimensions with the highest efficiency.
An ITG habit: high static load
Thanks to its 3.200 kg in 1:1 suspension, the elevator gearless hoisting machine ITG 05 has the highest static load of its segment.
The very high static load allows the ITG 05 to be used in many applications normally reserved for much more bulky, and expensive machines.
The sound of silence
The ITG 05 elevator gearless traction units are designed and manufactured to offer noiseless operations. Everything, from the design of the PM motor to the disk brake, has been designed and chosen in oder to produce silents operations.
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Convenience
The ITG 05 lift gearless machine is a perfect balance between high performance and economy. It is a pity that Customers do not have the possibility of checking the consistency of the magnetic mass of a traction unit for an elevator, or the quantity of magnets, copper and magnetic sheet, but if so, he would easily discover that the ITG 05 is really rich in substance
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Gearless hoisting machine ITG 06
TECHNOLOGY AS ITS BEST
Designed for payloads even exceeding 2,000 Kg. in 2:1 roping, the new gearless machine ITG 06, in line with the features of of gthe current ITG gearless traction units:
- 32-pole motor, ensuring the least possible torque ripple and the greatest fluidity of operation;
- small dimension footprint, allowing the best use of the space of the lift shaft and facilitating installation;
- design for heavy duty cycle to prevent magnets from reaching maximum working temperature (*);
- high static load, providing maximum flexibility of use and the highest safety level;
- particularly reduced starting and nominal currents, favoring the effective energy efficiency and lower operating temperature, for obtaining the higher reliability, over time, of all the components of the
traction unit;
- Design favouring natural heat dissipation.The included table shows only some of the possible applications of the new gearless hoisting machine ITG 06, since its multiple variants allow to develophundreds of possible installation alternatives.(*) = N-type Neodymium magnets permanently lose part of their magnetization at atemperature above 80°C
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