PMB32D-00200-02
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The PMB32D-00200-02 is a brushless DC motor with a rated power of 200W and a rated speed of 3000 rpm. Manufactured by Pacific Scientific as part of the PMB Brushless Servomotors Series, it features a protection class of IP54. The motor delivers a peak torque of 1.92 Nm and has an encoder resolution of 2500 PPR.
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Product Description:
The Pacific Scientific manufactures the servo motor PMB32D-00200-02 with a brushless design for industrial machines. It is built with eight pole pairs of high-quality Neodymium-Iron-Boron magnets for maximum torque density and optimal performance. This motor is equipped with inbuilt NTC thermal sensor for feeding the control drive discrete temperature values to avoid thermal stress.
The PMB32D-00200-02 servo motor achieves smooth operations with a continuous current of 5.20 A and 15.60 A of peak current at full load scenario for a brief time. It has an inertia of 0.000270 kgm² to ensure minimal energy loss and efficient operation. The unit generates 2.85 Nm of nominal torque and its peak torque reaches 11.40 Nm. It operates at a rated speed of 3500 rounds/min, while its double shielded bearings make a maximum speed of 6000 rounds/min possible. The PMB32 servo motor features a resistance of 2.30 Ohms between phases and an inductive value of 7.400 mH. It uses a resolver system for precise motion control and accurate position sensing. The motor offers MS-type connectors for power and feedback connection that are pre-attached to 45.7 cm cables of gauges 18 AWG and 26 AWG. It is designed with an IP40 construction rating to safeguard the internal components from dust and debris, while it is suitable for enclosed industrial environments only.
The PMB32D-00200-02 servo motor uses natural heat dissipation method through a mounting heat sink and its thermal time constant of 30 minutes, along with a low thermal resistance of 0.920 °C/W helps the unit stay in ambient thermal range. Its winding supports up to 212 °F of temperature and it is designed for 240 VAC along with 320 VDC bus supply. The motor possesses static friction of 0.120 Nm for effortless startup and carries a weight of 4.4 kg.
Frequently Asked Questions about PMB32D-00200-02:
Q: Why does PMB32D-00200-02 use eight pole pairs in its brushless design?
A: Increasing pole pairs raises torque density and improves low-speed responsiveness. Eight pole pairs enhance smoothness while maintaining high torque in a compact form.
Q: How does the low inertia (0.00027 kg·m²) of the PMB32D-00200-02 affect dynamic performance?
A: The minimal inertia allows rapid acceleration and deceleration, improving responsiveness in motion control. This reduces settling time in high-speed operations.
Q: Why is the resolver chosen for the PMB32D-00200-02 instead of optical encoders?
A: Resolvers are robust against dust, vibration, and temperature variations, making them ideal for industrial environments. The PMB32D-00200-02 benefits from precise position sensing without delicate optics.
Q: How does the thermal time constant of 30 minutes benefit the PMB32D-00200-02?
A: A 30-minute thermal time constant means the motor gradually heats, allowing the thermal protection system to respond before damage. This smooth temperature response supports sustained peak loads.
Q: What role does the 0.92 °C/W thermal resistance play in the PMB32D-00200-02?
A: Low thermal resistance means efficient heat transfer from winding to the heat-sink, keeping temperatures within safe limits. This helps maintain continuous operation at higher currents.
