IEC standard induction motors
MADE IN ITALY ELECTRIC MOTORS
SINCE 1966
SOGA® is the historic brand of the Soga Energy Team Group dedicated to the development and production of low voltage asynchronous electric motors. We manufacture our motors in Italy inside the factories of the Group, according to the Lean Manufacturing method by following with great flexibility all the production steps, from the windings up to the mechanical workings (shafts, flanges, shields), from the carpentry (housings and terminal boxes) to the assembly and testing of
each unit, thanks to latest generation automatized equipment and our specialized and constantly trained internal staff.
The range of SOGA IEC asynchronous motors includes more than 240 models up to 37 kW: starting from the standard versions, we can act on each component with electrical and mechanical customizations, offering unrevealed, unique and totally "tailor-made" solutions for any type of construction need and application.
Single Phase Motors Series:
MM1
Single phase
motors
MMD1
with centrifugal switch
MME1
with capacitor electronic switch
Three-phase Motors series:
MT1
Single speed
MT1
Two speed
MT3
IE3
TECHNICAL FEATURES
To choose an electric motor properly, the technical features to be considered are referred to following categories:
1 - Standards and certifications
2 - Electrical data
3 - Mechanical data
4 - Environment conditions
5 - Special executions and customizations
This catalogue presents SOGA induction electric motors in execution low voltage, single and three phase, designed and manufactured in our production plants in Italy according to our standard execution:
- Accordance with IEC 60034-1 and IEC 60072-1
- S6-75% continuous-operation periodic duty, 50Hz frequency for standard single speed three-phase motors (MT1)
- S1 continuous duty operation, 50Hz frequency, IE3 efficiency class for three-phase models (MT3)
- IEC frame sizes from 63 to 200, B3 constructive form
- Environment temperature up to 40°C, altitude up to 1,000 mt a.s.l.
- Ventilation IC411
1. STANDARDS AND CERTIFICATIONS
Standards
Soga electric motors are manufactured according to international standards IEC 60034- 1 and IEC 60072-1.
Our motors are also in accordance with following European directives:
- IEC 60034-30 efficiency classes
- IEC 60034-2-1 methods for determining efficiencies
- 2014/35/EU Low Voltage Directive
- 2014/30/EU electromagnetic compatibility (EMC) directive.
Certifications
SOGA SpA management system is ISO 9001:2015 certified. We can produce motors according to following certifications and certificate of conformity (Type approval) upon the motor type/model:
- Railway sector approvals.
- UL1446 insulation system
- ATEX zone 22 (2014/34/EU)
2. ELECTRICAL DATA
Duty cycles
The data of the outputs for our electric motors are generally referred to S3 and S6 duty cycles. At these duty cycles, motors can operate following a sequence of identical cycles each including a time of operation at constant load and a time at rest or at no-load. Motors operating at S1 duty cycle are indicated in their tables.
Nominal output
The outputs of Soga electric motors refer to the nominal output expressed in kW, that is the output power supplied by the motor to the shaft.
Frequency and voltage
All described technical data refer to motors supplied at 50Hz. Our electric motors are available in single and three-phase version. IEC EN 60034-1 admits a voltage variation of ±5% with a maximum increase of temperature rise of 10°C.
Efficiency classes
Soga three-phase electric motors are available in standard single speed three-phase version and IE3 version in compliance with IEC 60034-30 defining IE efficiency classes (International Efficiency) for single speed squirrel cage three-phase asynchronous motors with outputs from 0,75 kW to 375 kW, voltage up to 1000V and continuous duty operation.
STANDARD VERSION SINGLE SPEED THREE-PHASE
Motors in execution 2, 4, 6, 8 poles for extra EU markets or for EU markets used in applications not requiring high efficiency, operating in S6-75% duty.
IE3 PREMIUM EFFICIENCY
Motors realized by Soga in 2 and 4 pole execution from 0,75 kW. They offer a high premium efficiency by ensuring a strong decrease in electricity consumption, allowing to recover the investment from the first year of use. Thanks to their design optimized for high efficiency, IE3 motors ensure the windings a much lower thermal stress than motors with IE1 standard efficiency, allowing a longer motor life. For IE3 models, executions different from the standard 50Hz may change variations in the efficiency levels.
60 Hz use
The standard frequency for Soga motors is 50Hz. Standard three-phase motors can also operate at 60Hz. On request we can manufacture motors with special voltage.
Insulation classes
Soga single and three-phase motors in standard execution are Class F insulated. IE3 premium efficiency motors are Class F insulated with temperature rise Class B. Motors in Class H are available on request.
Windings treatment and post-treatments systems
Primary processes applied on stator windings for Soga motors are the following:
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Impregnation by dip with water-based varnish: treatment for single and three phase motors up to size IEC132. Windings are dipped in an open tank containing wa-ter-based varnish (single-component).
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Impregnation by dip with polyester resin: treatment for three phase motors from size IEC132 to IEC200. Windings are dipped in an open tank containing insulating polyester resin (single-component) while an active and constant check of the temperature is also applied.
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VPI vacuum encapsulation with epoxy resin: it is a treatment on request. The epoxy resin (single-component) is applied in autoclave through VPI (Vacuum Pressure Impregnation) system in aim to eliminate any moisture, air and gas in the windings. It is suitable for high voltage applications.
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Vacuum encapsulation with bi-component resin: treatment on request through epoxy bi-component resin, recommended for rotating electrical machines used in extreme contexts and, more generally, when the priority is to ensure the highest reliability level of the windings, for instance in automotive, wind and railway industry.
Always on request, on windings which have been previously impregnated, it is possible to apply tropicalization process on stators as a post-treatment, when the motors are used in high moisture (>95%) and saline environments (marine applications). As a special execution we can also supply windings with UL1446 insulation system.
Use with inverter
The standard series of our motors starting from size IEC112 is suitable for use with inverter, being equipped with phase separators on the end windings. Motors with this execution can also be realized on sizes below IEC112, on request.
Testing
Each of our motors is tested directly in our production lines. Our testing room and staff are available to customers who want or need to do further tests on custom-made motors manufactured by Soga, for applications requiring this such as railway.
Motor plates
Soga motors are supplied with metal plates or stickers describing the main electrical data.
3. MECHANICAL DATA
Rotor balancing
The rotor balancing is applied from size IEC112. For IE3 range the balancing 6.3 grade is applied to all motors starting from IEC80. On request we can ensure balancing grade 2.5 such as for railway sector, reducing mechanical vibrations while the motor is running
at full speed.
Construction forms
Standard coupling is B3 with feet.
Different couplings are available on request.
Protection degree
Soga single and three-phase motors are IP54 or IP55 depending on the frame size. IE3 premium efficiency motors are IP55 standard. Higher protection degrees are available as customized execution
4. ENVIRONMENT CONDITIONS
Correction factors
IEC 60034-1 and IEC 60072-1 standards refer to ambient temperature not exceeding 40°C and altitude up to 1000 m a.s.l. When the motors operate in different conditions, it is necessary to apply a correction factor. The table below expresses the percentage values of power that can be obtained by a motor when temperature and altitude change.
Humid environments
For motors used in humid environments, anticondensation heaters and holes can be applied on the housing.
Noise level
The table below shows the average noise values in Sound Pressure (LpA) and Sound Power (LwA) admissible by electrical machines established by IEC EN60034-9. Noise values are measured at a distance of one meter according to ISO 1680.
5. SPECIAL EXECUTIONS
Soga designs and produces motors with custom-made electrical and mechanical features by taking action on each component starting from our standard range, designed by our technical office or in accordance with the specifications indicated by the customer, to create motors fully integrated with his construction needs. We manufacture special executions for many applications from industry to railway (few examples: compressors, pumps, cranes, machines for food industry, elevators, cutting machines, aspirators, car-washers, hydro-cleaners, sprayers, ventilators). Customizations are possible for production quantities agreed with our sales office.
Examples of electrical customizations:
-Special windings (double impregnation, double speed rotation, double phase, encapsulation, VPI impregnation, insulation systems, special voltage, special frequency, tropicalization, etc.)
-Class H insulation
-Thermal protections and klixon
-Phase separators
-Thermistors
-Addition of bipolar and tripolar switches, encoders.
Examples of mechanical customizations:
-Special shafts (ceramic coating, hardening, stainless steel and other special materials,
splined shafts, etc.)
-Special housings (made to measure and with materials on request)
-Outgoing cables
-Special flanges and shields (reduced dimension, cast iron, on customer’s project)
-Safety brakes
-Gearboxes
-TEFV Totally Enclosed Force ventilated (IC416).
More customizations:
-Painting with epoxy powder in blue RAL 5010 or black RAL 9005
Certifications:
- Railway sector approvals
- UL 1446 insulation system
- ATEX zone 22 (2014/34/UE).
MM1
The Soga MM1 series features versatile single-phase electric motors available in 2, 4, and 6 pole configurations with IEC frame sizes 63 to 100. These robust motors combine Italian engineering with reliable performance across diverse industrial applications. Specialized versions for compressors offer enhanced starting characteristics and thermal protection, while concrete mixer variants provide superior durability in harsh construction environments. With multiple mounting options, protection class IP55, and power ranges from 0.18kW to 3.0kW, the MM1 series delivers exceptional reliability and efficiency in a compact, standardized package.
1) Isp/I= starting current / full-load current
2) Msp/M= starting torque / full-load torque
MM1 Overall dimensions (mm)
Shaft extension tolerances: j6 up to 28 mm diameter.
Key complying with N ISO h9.
MMD1
The Soga MMD1 series delivers powerful single-phase electric motors featuring an integrated centrifugal switch for exceptional starting performance. Available in 2 or 4 pole configurations with IEC frame sizes 80 to 100, these Italian-manufactured motors provide high starting torque for demanding applications. The robust squirrel cage design with aluminum housing and IP54 (TEFC) protection ensures outstanding durability in various operating environments. Built to last through any usage scenario, the MMD1 series combines reliability with premium craftsmanship. Special executions are available upon request to meet specific application requirements.
1) Isp/I= starting current / full-load current
2) Msp/M= starting torque / full-load torque
MMD1 Overall dimensions (mm):
Shaft extension tolerances: j6 up to 28 mm diameter.
Key complying with N ISO h9.
Shaft extension tolerances: j6 up to 28 mm diameter.
Key complying with N ISO h9.
MME1
The Soga MME1 series features premium single-phase motors with innovative capacitor electronic switch technology, available in 2 and 4 pole configurations on larger IEC frame sizes 112 to 132. These Italian-crafted motors combine advanced electronic switching with traditional squirrel cage design in aluminum housing, delivering superior performance and reliability. With IP54 (TEFC) protection, they ensure excellent resistance to environmental factors, guaranteeing longevity regardless of operating conditions.
1) Isp/I= starting current / full-load current
2) Msp/M= starting torque / full-load torque
MME1 series dimensions on request
MT1
Single speed three-phase motors.
The Soga MT1 Series delivers versatile single-speed three-phase motors available in 2, 4, 6, and 8 pole configurations across IEC frame sizes 63 to 200. Italian-manufactured with precision engineering, these motors feature robust squirrel cage design with aluminum housing optimized for S6 75% periodic duty at 50Hz frequency. Protection ratings of IP54 (up to IEC112) and IP55 (from IEC132) ensure reliable operation in challenging environments.
* Rated Output Power out of standard CEI EN 50347:2002-01
1) Isp/I= starting current / full-load current
2) Msp/M= starting torque / full-load torque
MT1
Two speed three-phase motors.
The Soga MT1 Series offers advanced two-speed three-phase motors designed for versatile industrial applications. Available in multiple configurations—2-4 and 4-8 poles with Single Dahlander type winding, and 4-6 poles with dual separated windings—these motors span IEC frame sizes 71 to 200. Italian-crafted with premium squirrel cage design in aluminum housing, they deliver reliable S6 75% periodic duty performance at 50Hz frequency. Protection ratings of IP54 (up to IEC112) and IP55 (from IEC132) ensure operational integrity across diverse environments.
MT1 Overall dimensions (mm):
* Shaft extension tolerances: j6 up to D = 28 mm, k6 from 38 to 48 mm, m6 for D = 55 mm
Key complying with N ISO h9
MT3
The Soga MT3 Series delivers high-efficiency three-phase motors meeting IE3 Premium Efficiency standards, available in 2 and 4 pole configurations across IEC frame sizes 80 to 180. These Italian-engineered motors operate at 400V@50Hz in standard execution, featuring premium-quality ZZ bearings and V-ring seals for superior protection and reliability
* Rated Output Power out of standard CEI EN 50347:2002-01
1) Isp/I= starting current / full-load current
2) Msp/M= starting torque / full-load torque
> Efficiency testing method according to IEC 60034-2-1
> IE3 Efficiency class according to IEC 60034-30 continuous duty
MT3 Overall dimensions (mm):
*Shaft extension tolerances: j6 up to D = 28 mm, k6 from 38 to 48 mm, m6 for D = 55 mm
Key complying with N ISO h9
(1) MT3 100 LB/4 model: L = 324 mm (2) MT3 112 MB/2 model: L = 353,5 mm (3) MT3 132 MB/2 model: L = 455 mm
*Shaft extension tolerances: j6 up to D = 28 mm, k6 from 38 to 48 mm, m6 for D = 55 mm
Key complying with N ISO h9