PMB33C-20200-02
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The PMB33C-20200-02 brushless servomotor features a nominal diameter of 33 mm, a shaft length of 2000 mm, a light preload, and a surface treated with nitriding for durability. Part of the PMB Brushless Servomotors series by Pacific Scientific, it is constructed from high carbon steel.
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Product Description:
The PMB33C-20200-02 is a PMB brushless series motor that is manufactured by Pacific Scientific. Its inductance between phases is 27.20 mH to support smooth current transitions under dynamic loads and it requires a 240 V AC source to operate, while its maximum DC bus voltage requirement is 320 V.
The PMB33C-20200-02 motor features compatibility with standard mounts with a mounting face that uses a 4-bolt pattern and it comes in a NEMA 34 structure with a rotor stack length three for enhanced torque output. It possesses a rated peak torque capability of 16.10 Nm under limited duty with a maximum current draw of 8.70 A and its rated continuous turn effect at the speed of 1300 rev/minute is 4.840 Nm. The unit has a measured torque constant of value 1.860 Nm/A and its back EMF constant stands at 1.110 Vrms/rad/sec. It winding impedance between two lines is specified as 8.60 Ohms and its thermal protection of category F allows maximum winding temperature rise up to 100°C. This PMB motor has a thermal resistance of 0.78 °C/W and 0.533 h of heat dissipation time to stay in operatable temperature range. It supports an optional heatsink mount for efficient natural cooling with a size of 25.4 x 25.4 x 0.635 cm.
The PMB33C-20200-02 motor is presented with a seal less square design of shaft and circular MS connectors for wiring. Its internal structure is made of eight pole Neodymium-based permanent magnets for high torque delivery and it includes a thermistor that enables thermal overload sensing via a control drive. The unit’s feedback depends on the built-in resolver system and its angular inertia is 0.404 ×10⁻³ kg·m² to support motion stability in rapid axis changes.
Frequently Asked Questions about PMB33C-20200-02:
Q: Why does the PMB33C-20200-02 motor use Neodymium permanent magnets?
A: The Neodymium magnets provide higher torque density compared to ferrite magnets, allowing the motor to deliver more output power within compact dimensions. This ensures efficient performance in high-load applications.
Q: Why is thermal resistance important in the PMB33C-20200-02 motor?
A: The lower thermal resistance enables faster dissipation of heat into the environment. This protects the windings and increases long-term motor reliability under continuous operation.
Q: What role does the built-in thermistor play in the PMB33C-20200-02 motor?
A: The thermistor monitors winding temperature in real time. This data allows the drive controller to prevent thermal overload through automatic current adjustments.
Q: How does angular inertia of 0.404 kg·m²×10⁻³ benefit motor operation?
A: This optimized inertia value balances acceleration response with stability. It minimizes overshooting during rapid axis changes in automation setups.
Q: Why does the PMB33C-20200-02 motor use MS circular connectors for wiring?
A: Its MS circular connectors provide secure locking with vibration resistance. They ensure stable power and signal transmission in industrial conditions.
