PMB33E-20100-01
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The PMB33E-20100-01 is a compact panel-mounted brushless servomotor with IP20 ingress protection and a weight of just 0.85kg. Manufactured by Pacific Scientific as part of their PMB Brushless Servomotors Series, it operates at 200-240V with a frequency of 50/60 Hz. Its dimensions are 88mm x 112mm x 130mm.
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Product Description:
The Pacific Scientific PMB33E-20100-01 Brushless Servomotor comes with a specialized E type winding. It features a strong continuous stall torque of 5.42 and is able to deliver reliable operation with low thermal resistance.
The PMB33E-20100-01 brushless servomotor can run a relatively 4.41 newton meters routinely during regular operation. Its rotor has an inertia of 0.404 kg·m² × 10⁻³ and it includes a seal at the shaft for a safer operation. It consumes 7.4 ARMS of nominal stall current during rated stall conditions. In order to lock firmly into couplings or other components its shaft is cut with a keyway and square key. Its windings resistance to current is 2.2 ohms and its voltage constant of 0.56 VRMS/rad/sec shows the amount of voltage appears per unit of angular speed. It takes about 32 minutes time to reach around two thirds of its steady state temperature rise. It can briefly reach to peak turning effort of 16.1 Nm and a resolver is included in this model for precise position and speed feedback. It comes with a viscous damping coefficient of 0.038 Nm/kRPM that shows the opposing torque resulting from internal drag.
During stalled this PMB33E-20100-01 brushless servomotor can continuously handle current of up to 5.8 amperes efficiently. It needs 0.169 newton meters of torque to get the shaft moving from a completely stopped position. To achieve the peak torque output it consumes about 17.5 amperes of current. Its shaft is able to spin up to 3000 rpm under rated conditions and its wiring comes out as loose leads already fitted with AMP connectors.
Frequently Asked Questions about PMB33E-20100-01:
Q: How does the E-type winding in the PMB33E-20100-01 affect motor performance?
A: The E-type winding is optimized for balanced torque output and efficiency, reducing electrical losses under heavy loads. This leads to smoother motion control and stable thermal behavior.
Q: How does a resolver improve accuracy in the PMB33E-20100-01?
A: Resolvers provide continuous, noise-resistant feedback even in harsh environments. They ensure precise angular position data for reliable servo control.
Q: What impact does thermal resistance have on real-world motor operation?
A: Lower thermal resistance improves heat dissipation, allowing higher sustained performance. It also extends motor lifespan by reducing insulation stress.
Q: Can this servomotor run safely at high current for extended periods?
A: It can handle continuous currents within rated limits, but prolonged overloads risk overheating. Adequate cooling is necessary for stable long-term operation.
Q: Why is viscous damping relevant in dynamic motion systems?
A: Viscous damping counteracts overshoot and oscillation during rapid speed changes. This improves settling time and enhances control stability in precision systems.
