Synchronous Motors
Standard type sensorless GNB2 Series

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High efficiency and energy savings
Motor efficiency same level as IE3 (premium efficiency)!
Note: IE3 is an efficiency class based on IEC 60034-30. -
Compact and lightweight
Volume ratio: On average 35% improvement,
Mass ratio: On average 40% improvement ! (in-company comparison)
The motor frame number of frames 1 to 3 is lower than that of induction motors. Machinery can be made compact and space-saving. -
High power factor
Reduces the power receiving equipment capacity !
In addition to high efficiency, the higher power factor than the induction motor can lower current capacity of the equipment. -
Maintenance friendly
Easy bearing replacement !
A structure that facilitates bearing replacement work without taking out the rotor improves on-site replacement and work efficiency.
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Note 1
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Special-purpose motors with base rotor speeds of 1000, 1200, 1500, 3000, and 3600 min-1 can also be manufactured.
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Note 2
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Contact us when switching from commercial operation.
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Note 3
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Flange mounting type can be manufactured for motor frame numbers of 160 and below.
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Note 4
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Contact us if you require a special-purpose motor with a rated output of 3.7 kW or less, or a motor over 315 kW.
Slide base rails
Dimensions for the standard type GNB and GNF2 series only
〔Unit: mm〕
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Note 1
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Only available for the GNB2 Series (sensorless) and GNF2 Series (with sensor) standard type synchronous motors.
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Note 2
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The above are all standard inventory products.
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Note 3
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The paint color is Munsell N1.2 (black).
Grounding rings

In general, a grounding brush is incorporated in motors with frame numbers of 225 or higher to prevent bearing electric corrosion. The grounding brush is a consumable part and must be replaced periodically. A maintenance-free grounding ring (Aegis® SGR) is also available as an option when it is difficult to replace the grounding brush depending on the installation location or operating conditions.