PMB33F-20200-01
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The Pacific Scientific PMB33F-20200-01 is part of the PMB Brushless Servomotors series and features a 20 mm sensing distance with an inductive sensing method. This proximity sensor has an operating voltage range of 10-30 VDC and a max load current of 200 mA. It is housed in nickel-plated brass and boasts an IP67 protection rating.
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Product Description:
The PMB33F-20200-01 is a permanent magnet servomotor from the PMB series designed by Pacific Scientific. It uses 8 pole high-energy neodymium-iron-boron magnets in its construction for high torque density in compact applications. The motor’s shaft style is configured with a square key and its diameter is 12.7 mm, along with a length of 25.4 mm.
The PMB33F-20200-01 motor includes a shaft seal for added protection and its sealing rating is IP40. It is built with a NEMA 34 frame size and a long stack length. This motor delivers a continuous stall torque of 5.42 Nm and it provides a peak torque output of 16.1 Nm for intermittent duty. The rated speed of the motor is 4600 RPM and its maximum speed limit is 6000 RPM for short bursts. Its winding supports 9.0 Arms continuous current and it can handle up to 27.1 Arms at peak operation. This PMB33F servo motor has a winding resistance of 0.96 Ohms between two lines and its inductance is rated as 2.8 mH. The torque constant is 0.60 Nm/Arms and the total rotor inertia with encoder is 0.404 kg·cm². The motor is equipped with a resolver feedback system for closed-loop control. It uses flying leads with MS connectors for power and feedback, both cables are 457 mm long and shielded for signal protection.
The PMB33F-20200-01 servo motor’s front mounting flange is 87.4 mm square and mounting hole are 69.6 mm apart, while the four mounting holes accept 5.5 mm fasteners. It features double-shielded bearings for extended service life and possess class F insulation for thermal protection that supports winding temperatures up to 155°C. This PMB33F servo motor supports 240V AC and 320V DC bus systems.
Frequently Asked Questions about PMB33F-20200-01:
Q: How does the resolver feedback in PMB33F-20200-01 improve control?
A: The resolver provides precise angular position feedback even under high-speed rotation, enhancing closed-loop stability. It is robust in harsh environments and ensures accurate commutation for the PMB33F-20200-01.
Q: What advantage do double-shielded bearings give in PMB33F-20200-01?
A: Double shielding reduces contamination and retains lubrication, extending bearing life under demanding duty cycles. For the PMB33F-20200-01, this means higher reliability in high-speed and intermittent torque operation.
Q: Why is a square-key shaft chosen for PMB33F-20200-01?
A: A square key provides positive mechanical engagement for high-torque transmission, minimizing slippage. In PMB33F-20200-01, the 12.7 mm×25.4 mm shaft ensures rigid coupling to loads.
Q: How does long-stack construction affect PMB33F-20200-01?
A: A long-stack rotor increases torque output by extending the magnetic interaction length. In PMB33F-20200-01, this contributes to its high continuous (5.42 Nm) and peak torque (16.1 Nm) capabilities.
Q: What is the benefit of using resistive winding details in PMB33F-20200-01?
A: The 0.96 Ω winding resistance influences current draw and thermal characteristics, aiding accurate drive tuning. For PMB33F-20200-01, tuning with that value ensures optimal current-limited performance.
