103H7522-70B1 Sanyo Denki
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The Sanyo Denki 103H7522-70B1 is part of the StepSyn Stepping Motors series and features a 60 mm frame size with a mass of 0.6 kg. This 5-phase motor provides a holding torque of 0.735 N·m and has a rated current of 0.75 A per phase. It has a step angle of 0.72 degrees per step and a motor length of 53.8 mm.
Internal Product Review
The 103H7522-70B1 is a Sanyo Denki StepSyn stepping motor with a 5-phase configuration and a precise 0.72° step angle. Holding torque of 0.735 N·m and rated current of 0.75 A/phase give this unit an excellent balance of positioning strength and controlled power demand. A compact build makes this motor a strong choice for accurate motion applications.
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Product Description:
The 103H7522-70B1 is a hybrid stepping motor built by Sanyo Denki and belongs to the StepSyn Stepping Motors series. As a five-phase device that advances in fixed increments, it converts digital pulse commands into repeatable shaft rotation, letting CNC tables, small pick-and-place units, and indexing mechanisms achieve precise positioning without closed-loop feedback. Its compact housing provides consistent holding capability during dwell periods while fitting into space-constrained machinery.
The motor’s square frame measures 60 mm across, providing a standardized mounting face that matches many miniature gearboxes and brackets. Its overall stack depth is 53.8 mm, so the motor can fit inside shallow enclosures while accommodating the required magnetic length. A mass of 0.6 kg keeps the added weight low when the unit is mounted on linear stages or end effectors. Static holding torque is rated at 0.735 N·m, indicating how much load the rotor can restrain when the coils are energized but no step command is issued. Dynamic behavior during acceleration is influenced by the rotor’s moment of inertia of 1.8 × 10⁻⁵ kg·m², which supports quick speed changes with moderate drive current.
The stator uses a five-phase winding, allowing the drive to issue smaller electrical step increments and reduce resonance compared with three-phase designs. Each phase draws a continuous 0.75 A per phase, establishing the output current requirement for the microstepping driver. Mechanical resolution is based on a native step angle of 0.72° per step, allowing 500 full steps per revolution before electronic subdivision. Coil inductance is rated at 7.5 mH per phase, affecting voltage rise time and the speed at which current can change during high-speed operation. The per-phase winding resistance is 3.3 Ω, which affects steady-state power dissipation and must be considered when selecting a compatible drive. Proper current regulation helps the motor maintain predictable torque while limiting excess heat in the windings.
