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You can see this on our nameplate. There is a P at the end of our serial number.
The higher the number, the more efficient the motor.
Energy efficiency class:
IE1=Standard efficiency
IE2=High efficiency (HE)
IE3=Premium efficiency (PHE)
IE4=Super Premium Efficiency (SPE)
The use of a frequency converter can drastically reduce energy consumption compared to direct mains operation, where the motor runs at full speed regardless of demand. The use of a frequency converter typically results in electricity or fuel savings of approximately 40%.
The most basic difference is the power supply.
AC motors are alternating current motors, while DC motors are direct current motors.
The physical operating principle of an electric motor is based on electromagnetic induction and the conversion of electrical power into mechanical power - a motor can therefore be described as an energy converter. Basically, an electric motor consists of two parts: The fixed part, called the stator, and the moving part, called the rotor. The purpose of an electric motor is to make the rotor rotate. The basis for this motion is magnetism. Both the rotor and the stator contain coils. When current is applied, magnetic fields are created that attract or repel each other. When this force is applied to the rotor - physically speaking, it is 'induced' - it moves. But only a little. This impulse movement is the basis of any electric motor.
Our pole-changing motors are designed to operate at two constant speeds which can be switched between. Typical applications include fans or air conditioners in the ventilation industry. Our two-speed motors are available in all common designs.
For installation in hazardous areas, the motors can be modified to Zone 2 and/or Zone 22.
Zone designations:
- Zone 2 (old designation) = II 3G Ex nA II(B, C) T(2, 3, 4)
- Zone 2 (new designation) = II 3G Ex ec II(B, C) T(2, 3, 4)
- Zone 22 = II 3D Ex tc III(B, C) T125°C
Our IEC standard motors are available in all designs to suit your requirements.
The terminal box is in the "top" position. For motors with aluminium housings, the position of the terminal box can be changed to the left or right (view to drive side, also called A-side). For cast iron housings, the terminal box position can also be changed to the side, depending on the project.
The standard position of the terminal box is "close" to the A-side.
For applications where space is at a premium, the terminal box can be rotated. The terminal box housing will then be "close" to the B-side.
For motors in aluminium enclosures, the feet can be screwed on and off as required.
For vertical installation (especially outdoors) with the shaft downwards, a canopy is recommended.
For use in higher ambient temperatures, we can upgrade your electric motor for climatic conditions up to 120°C. In addition to selecting the appropriate insulation class H, we configure the individual motor protection and ventilation solutions.
The motors are fitted with plastic or aluminium radial fans that cool independently of the direction of rotation of the motor (IC 411 according to DIN EN 60034-6).
If this cooling is not sufficient, a forced cooling fan can be installed.
For your specific application, we can complement your electric motor with an optical, magnetic incremental or absolute encoder that will provide you with an accurate digital reading. Due to the wide range of encoders available, please contact us.
For dusty and humid environments it is recommended to upgrade the IP rating.
Our motors are manufactured to IP55 as standard in accordance with DIN EN 60529.
Optionally, motors can be ordered in IP 56, 65 and 66.
Special finishes, thicknesses and RAL colour coding can be supplied to meet your requirements.
Coatings can be applied in C2, C3, C4 and C5 thicknesses.
The motors are fitted with high quality ball bearings from reputable manufacturers. Please refer to our catalogue for a detailed list of bearing types and permissible axial and radial loads.
We adapt the bearing design of your motor to the specific application, e.g. by using cylindrical roller bearings for increased radial loads, or by using current-insulated roller bearings, e.g. for frequency converter operation.
If required, we can equip the motors with a regreasing device.
Various protection devices are available to protect the motor from thermal overload:
- Thermal resistor in the form of a PTC thermistor (PTC)
- Motor protection switch in the form of a bimetal (PTO) or PT100 / PT1000
Please contact us if you require advice or further information on this subject.