PMB33F-20200-03
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The PMB33F-20200-03 is a pneumatic cylinder with a bore size of 33mm and a stroke length of 200mm. Manufactured by Pacific Scientific, it is part of the PMB Brushless Servomotors series, featuring a front flange mounting style and an operating pressure range of 0.1–1.0 MPa. The cylinder is made from aluminum alloy with NBR seals.
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Product Description:
Pacific Scientific produces PMB33F-20200-03 as an AC brushless motor that features MS-style connectors with 18” flying leads for electrical connectivity to a 240 V AC source. It is constructed with a frame of NEMA 34 that conforms to standard mounting interfaces. The unit features natural cooling through heat dissipation via an optional mounting heatsink that measure 10” x 10” x 1/4” in dimension.
The PMB33F-20200-03 motor is presented with a square design of shaft accompanied by a key fitting for mechanical stability. Its winding is optimized for continuous locked current of 9.0 A, along with a peak current capacity of 27.1 A. This motor delivers 5.42 Nm of continuous torque and 16.10 Nm of peak torque, while at 4600 rounds/min of rated speed it maintains 4.04 Nm of output torque. It is equipped with resolver feedback for keeping track of position and speed. The PMB motor provides a turn effect constant of 0.600 Nm/A and 0.37V/rad/s of voltage constant for accurate commutation control. It employs a combination of neodymium, iron and boron magnets for high torque-to-size efficiency. Its rotor support is provided by double-shielded bearings designed for continuous-duty operation and the unit has a total mass of 6.3 kg, along with an overall length of 210.3 mm.
The PMB33F-20200-03 motor possess rotor angular inertia of 0.0004040 kg·m² for mid-inertia load applications and its static friction is limited to 1.50 Nm, while its damping factor is rated as 0.03800 Nm/krpm. Its heat resistance is specified as 0.780 °C/W and it take 1920 sec of time under standard ambient conditions to normalize in temperature. The unit has an IP40-rated housing to guard against solid ingress above 1 mm and its shaft sealing as well as inbuilt thermal sensing equipment makes this motor even more protective.
Frequently Asked Questions about PMB33F-20200-03:
Q: Why does the PMB33F-20200-03 utilize resolver feedback?
A: Resolver feedback ensures real-time, high-resolution position and speed data, improving control accuracy. It is also robust under harsh electrical noise or temperature variations.
Q: How does the natural cooling via heatsink benefit PMB33F-20200-03?
A: Passive heatsink cooling removes heat without additional power or noise, enhancing reliability. It maintains temperature stability under sustained load, extending motor life.
Q: Why is the NEMA 34 frame significant for PMB33F-20200-03?
A: NEMA 34 ensures compatibility with standard mounts and simplifies integration into industrial systems. It also supports a higher torque density relative to smaller frames.
Q: What advantage does the square shaft with key fitting provide in PMB33F-20200-03?
A: The keyed square shaft ensures secure coupling to drives and guards against slippage under load. It simplifies alignment during installations in precision assemblies.
Q: How do the neodymium-iron-boron magnets benefit PMB33F-20200-03?
A: These magnets deliver high magnetic field strength, improving torque-to-size ratio. They also enhance responsiveness and efficiency during dynamic operations.
