SANYO Denki QF1P Series Servo Motors QF1PA270N1

Technical Dossier

Product Details And Specifications

SANYO Denki QF1P Series Technical Notes

The SANYO Denki QF1P Series represents a mature, widely deployed line of AC servo motors engineered for precision motion control in heavy industrial environments. These units are installed across global process industries including petrochemical refineries, nuclear power auxiliary systems, offshore platform control systems, and large-scale chemical processing plants. The QF1P Series is characterized by its high torque density, resolver-based feedback architecture, and compatibility with SANYO Denki's proprietary servo amplifier ecosystem. The QF1PA270N1 is a representative mid-range unit within this series, rated for continuous duty in demanding ambient conditions.

The Evolution of QF1P Series Architecture

The QF1P Series was developed as part of SANYO Denki's second-generation servo platform, succeeding the earlier P5 and BL Super Series. The architecture transitioned from brush-type DC servo to brushless AC servo, adopting resolver feedback as the primary position sensing method — a design choice that prioritized robustness over absolute encoder resolution, making the series well-suited for high-vibration and high-temperature industrial installations.

QF1P Series Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly sourced models within the QF1P Series. Units are classified by frame size and rated output torque. All models use brushless AC servo motor construction with resolver feedback unless otherwise noted.

QF1PA270N1: Mid-frame AC servo motor, 270W continuous rated output, resolver feedback, flange mount
QF1PA400N1: 400W continuous output, standard flange, resolver, general-purpose motion axis
QF1PA750N1: 750W frame, high-torque density, suitable for conveyor and indexing table drives
QF1PA100N1: 100W compact servo, low-inertia rotor, used in small-axis positioning applications
QF1PA200N1: 200W mid-compact frame, resolver, compatible with SANYO Denki BL amplifiers
QF1PA550N1: 550W output, intermediate frame, used in packaging and assembly line axes
QF1PA850N1: 850W high-output frame, heavy-duty duty cycle, industrial robot joint drives
QF1PA1K0N1: 1.0kW rated, large frame, high inertia load compatibility
QF1PA1K5N1: 1.5kW continuous, used in CNC spindle assist and heavy conveyor applications
QF1PA2K0N1: 2.0kW frame, resolver, high-speed winding and unwinding axis drives
QF1PA270N1B: 270W variant with brake option, vertical axis and gravity-load applications
QF1PA400N1B: 400W with integrated holding brake, vertical lift and Z-axis positioning
QF1PA750N1B: 750W brake-equipped variant, crane auxiliary and vertical transfer systems
QF1PA100N1B: 100W with brake, compact vertical axis servo for small assembly equipment
QF1PA550N1B: 550W brake variant, used in press-feed and intermittent motion applications
QF1PA1K0N1B: 1.0kW with brake, heavy vertical load holding, industrial elevator auxiliary drives

Sourcing Hard-to-Find & Obsolete QF1P Series Parts

The QF1P Series is no longer in active production by SANYO Denki. Facilities operating equipment built around these motors — including legacy CNC machines, process control actuators, and automated assembly lines — face increasing difficulty sourcing direct replacements through standard distribution channels.

Quality Control for the QF1P Series Range

QF1P Series motors present specific test challenges due to their resolver-based feedback systems and the age-related degradation patterns common in long-fielded servo motors. DriveKNMS applies a structured inspection and test protocol to all QF1P units processed through our facility:

Resolver excitation and output signal verification is performed using a dedicated resolver analyzer to confirm R1/R2/S1/S2/S3/S4 winding integrity and transformation ratio within OEM specification. Winding insulation resistance is measured at 500VDC between each phase and ground, with acceptance threshold set at ≥100MΩ. Bearing condition is assessed via vibration spectrum analysis at rated speed, with replacement mandatory if axial or radial play exceeds OEM tolerance. Back-EMF waveform symmetry is verified at controlled RPM to confirm rotor magnet integrity. Brake holding torque (for N1B variants) is tested at rated voltage against the published holding torque specification. Final run-in is performed under load for a minimum of 30 minutes with thermal monitoring to confirm stable operating temperature.