PMB33F-20201-02
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The PMB33F-20201-02 is a NEMA Size 34 brushless servomotor with electronic commutation and three phases. Manufactured by Pacific Scientific within their PMB Brushless Servomotors series, it features Hall sensors for feedback and supports encoders with resolutions up to 4096 lines.
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Product Description:
The PMB33F-20201-02 Servo Motor by Pacific Scientific incorporates a modest static friction of 0.169 Nm. It includes a factory installed thermistor for monitoring temperature precisely and safeguarding against potential overheating in a demanding environment.
The PMB33F-20201-02 servo motor will consume steady electric current of 11 amperes if the shaft is locked in place and generating its maximum holding force at standby position. It can deliver the greatest torque of 16.1 Nm for short bursts before overheating or risking damage. This module takes 32 minutes to heat up or cool down by about 63 percent of the difference between its current temperature and a new temperature after a change in workload. Its drive rod has a machined slot for a square shaped metal key and its intended supply pressure of electricity is 240 volts. It has a winding designation of F and its rotor reluctance to change its spinning speed is measured as 0.404 kg·m² × 10⁻³. It can deliver 5.4 Nm of rotational push constantly while locked without increase in its heat level. It comes with magnetic field detectors that help the control device know the position and movement of the motor.
This PMB series motor can keep indefinitely the average torque of 4.04 newton meters under normal running conditions with the specified voltage. Its temperature rises with 0.78 °C for every watt of heat generated and it comes with a standardized physical footprint of type NEMA 34 which means the front face measures about 3.4 inches. When it is providing maximum short term rotational force, it gulps down about 27.1 amperes current. Its wiring comes as loose and flexible cables already fitted with military style connectors.
Frequently Asked Questions about PMB33F-20201-02:
Q: How does the static friction value affect the starting performance of the PMB33F-20201-02 motor?
A: A low static friction means less torque is needed to initiate rotation, improving responsiveness. This can reduce energy waste and improve control accuracy during start-up sequences.
Q: What is the significance of the thermal time constant in real-world operation?
A: It determines how quickly the motor’s temperature reacts to load changes. A longer time constant allows more stable thermal behavior but delays cooling between heavy cycles.
Q: How does frame size NEMA 34 influence installation flexibility?
A: It ensures compatibility with a wide range of standard mounts and gearboxes. This reduces the need for custom mechanical adapters during integration.
Q: Why is a PTC thermistor important for motor safety?
A: It changes resistance sharply at high temperatures, triggering protection circuits before overheating occurs. This safeguards both the motor and connected drive electronics.
Q: How does the rotor’s inertia value influence acceleration and deceleration rates?
A: Lower inertia allows quicker speed changes, enhancing positioning accuracy. Higher inertia provides smoother motion but slows rapid directional changes.
