PMB33F-20200-00
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The PMB33F-20200-00 is a closed linear ball bearing with a bore diameter of 20 mm and an outer diameter of 32 mm. Manufactured by Pacific Scientific, it belongs to the PMB Brushless Servomotors series and features double seals. The bearing is made of bearing steel and operates from -20°C to 80°C.
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Product Description:
The Pacific Scientific PMB33F-20200-00 Brushless Motor balances responsiveness and stability with average inertial. It incorporates a rugged resolver for precise feedback and it manages changes in current with 2.8 mH inductance. It runs dependably up to 240 volts AC, suitable for demanding applications that require accuracy, durability and controlled performance.
The PMB33F-20200-00 motor resistance to current flow within its windings is 0.96 ohms. The steady rotational force it is able to generate for an indefinite time is 5.42 newton meters. To ensure power is transmitted firmly to pulleys, gears or couplings its shaft has a machined slot and key shape. The amount of rotational force it is capable of delivering usually under normal working conditions at speed is 4.04 Nm. It requires over 27 amps of current to consume to reach its maximum burst of rotational force. Its housing temperature rises about 0.78 degree Celsius for every watt of power lost as heat. Its winding design and insulation style is labeled as F, and it needs 0.169 Nm torque just to break the rotor free from zero speed position. It features loose wires that terminate in AMP brand connectors and it produces 0.60 newton meters for every ampere of current supplied.
This PMB33F-20200-00 motor draws 9 amperes of current to keep generating its continuous stall torque at standstill position. The amount of opposing torque that appears for each thousand revolutions per minute is 0.038 newton meters. It is able to accept rated current of 11 ARMS at stall under its intended operating conditions. This module is built as a standard motor and it has no unusual modifications or customer specific adjustments.
Frequently Asked Questions about PMB33F-20200-00:
Q: How does the inertia value affect the responsiveness of the PMB33F-20200-00 motor?
A: Moderate inertia balances smooth motion with reasonably fast acceleration. It helps stabilize loads without causing sluggish response in dynamic applications.
Q: Why is a resolver sensor used instead of an optical encoder?
A: Resolvers are highly durable and maintain accuracy in harsh environments with vibration, dust, or temperature swings. They provide continuous feedback without being affected by electrical noise.
Q: What impact does the motor’s inductance have on drive compatibility?
A: Higher inductance reduces current ripple but slows high-frequency response. Drives with fast switching must be tuned carefully to avoid instability.
Q: Does the PMB33F-20200-00 require a specific type of drive controller?
A: Yes, it requires a compatible servo amplifier capable of handling its voltage, current, and resolver feedback. Mismatched controllers may lead to inefficient performance or errors.
Q: How does thermal resistance influence long-term reliability?
A: Lower thermal resistance allows better heat dissipation, reducing winding temperature rise. This directly extends insulation life and improves continuous duty reliability.
