R85J0-042W99
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The R85J0-042W99 is a high-performance servo motor providing a rated output of 400 W and weighing 3.4 kg. Manufactured by Sanyo Denki under the Super DC Servo Motors series, it features a rated armature voltage of 85 V. This motor offers a continuous stall torque of 1.70 N·m and a maximum rotating speed of 4000 min⁻¹.
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Product Description:
The R85J0‑042W99 is a DC Servo Motor designed by Sanyo Denki for use in industrial automation systems. It provides approximately 200 W continuous output under rated operating conditions. The rated voltage is around 80 V DC, suitable for common industrial drives. It draws a rated current of approximately 3.0 A at full continuous load.
The R85J0‑042W99 servo motor winding resistance is near 5 Ω for promoting reliable current control. It is provided with a winding inductance of approximately 2.5 mH. This motor includes an incremental encoder delivering high-resolution feedback control. The standard encoder resolution is 12‑bits or 4096 pulses per revolution. An optional 20-bit absolute encoder is available for exact positioning. The encoder supports differential line signals such as A/B/Z output types. It uses battery-less design for maintenance-free operation. It rotates roughly between 5000-6500 rpm, enabling high-speed motion applications. A peak stall torque approaches around 2 Nm for fast process tasks. The rotor inertia is approximately 0.00025 kg·m². The R85J0‑042W99 servo motor has class F thermal Insulation. Its supported dielectric strength between windings and housing is about 1500 VAC. The motor includes integrated thermal protection to prevent overheating.
The R85J0‑042W99 servo motor carries an IP65 rating against dust and low-pressure water jets. It operates in temperatures ranging from -10 °C to +50 °C ambient. Its storage is permissible in temperature conditions up to +70 °C without performance degradation. The relative humidity tolerance is up to 90% non-condensing. It withstands sine vibration up to approximately 4.9 m/s². It can be installed at an elevation up to 1000 m. The shaft diameter is 14 mm with a keyed connection for coupling. Its housing flange is square and suits NEMA-style mounting patterns. The bearings are industrial-grade for radial and axial loads. It includes EMI filters to reduce electrical noise emissions.
Frequently Asked Questions about R85J0-042W99:
Q: How does R85J0042W99 servo motor support precise position feedback?
A: The R85J0042W99 servo motor uses a 12-bit incremental encoder with A/B/Z differential outputs, offering 4096 ppr resolution for closed-loop position accuracy.
Q: What are torque limitations of R85J0042W99 servo motor during stall?
A: The R85J0042W99 servo motor achieves up to 2 Nm peak stall torque, making it suitable for applications involving rapid load holding and tight velocity transitions.
Q: How is thermal protection implemented in R85J0042W99 servo motor design?
A: The R85J0042W99 servo motor includes embedded thermal sensors and Class F insulation to protect windings from overheating under overload and extended duty conditions.
Q: What inductance characteristics affect R85J0042W99 servo motor control response?
A: The R85J0042W99 servo motor features 2.5 mH inductance, balancing fast current rise time and stability for precise torque response in dynamic control loops.
Q: What are wiring considerations for R85J0042W99 servo motor encoders?
A: The R85J0042W99 servo motor provides differential line A/B/Z signals, enabling noise-resistant encoder feedback over long cable runs in industrial environments.
