S21HNAA-RNNE-00
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The S21HNAA-RNNE-00 brushless motor offers a continuous stall torque of 0.5 Nm, a peak torque of 1.36 Nm, a rotor inertia of 0.042 kgm^2 x10^-3, and features Interconnection Connectors for termination. Part of the S Brushless Motors series by Pacific Scientific, it adheres to the NEMA 23 frame size and weighs just 1.4 kg.
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Product Description:
The Pacific Scientific S21HNAA-RNNE-00 is a small brushless service motor with a NEMA 23-frame that is intended for precise guidance applications.
Its 1-stack design and 1.4 kg weight eliminate unnecessary mass, resulting in a decent torque output throughout the operation. With a specified starting torque of 0.5 Nm, the motor guarantees consistent operation under constant load. Any light-duty application, such as packing machines or automation robots, that requires high-torque loads in brief bursts can utilize it, since it can also provide an all-time high torque of 1.36 Nm. The motor's torque constant of 0.2 Nm/ARMS enables consistent torque production with current input. It also satisfies industrial product specifications with a voltage constant of 0.13 VRMS/rad/sec. Its induction line-to-line is 3.7 mH, which favorably contributes to stable electrical performance. It has a resistance of 3.0 ohms, which assists in effective power consumption and good performance.
Even with a rotor inertia of only 0.042 x 10⁻³ kg·m², the motor has quick control response, making it suitable for tight motion loops and fast start-stop applications. The primary piece of equipment that responds to this feedback is a frameless Size 21 resolver. While the resolvers are robust, optical encoders are prone to failure. Since it lacks supplementary input, this model ought to be used in situations where a coarse or resolver-level resolution is appropriate. Because it doesn't have a shaft seal, it shouldn't be used or stored in areas with a lot of liquids or dust unless precautions are taken outside. Interconnection connectors, which are less common but common in systems that use that standard, are used to terminate this one as opposed to the more common use of MS connectors.
Frequently Asked Questions about S21HNAA-RNNE-00:
Q: What are the torque capabilities of the S21HNAA-RNNE-00?
A: The S21HNAA-RNNE-00 delivers 0.5 Nm continuous stall torque and up to 1.36 Nm peak torque, ideal for robotics, light automation, and packaging systems.
Q: What kind of feedback does the S21HNAA-RNNE-00 provide?
A: It features a frameless Size 21 resolver, offering reliable, rugged feedback in environments where optical encoders might fail. No secondary feedback is included.
Q: What are the electrical characteristics of the S21HNAA-RNNE-00?
A: It has a torque constant of 0.2 Nm/ARMS, a voltage constant of 0.13 VRMS/rad/sec, 3.7 mH inductance, and 3.0 ohms resistance—balanced for control and efficiency.
Q: How does the S21HNAA-RNNE-00 connect electrically?
A: Unlike standard MS connectors, the S21HNAA-RNNE-00 uses Interconnection connectors, which are compatible with certain motion systems that follow that wiring standard.
Q: Is the S21HNAA-RNNE-00 protected against harsh environments?
A: No, it lacks a shaft seal, so it should not be used in environments with dust, fluids, or contaminants unless protected externally.
