PMB31B-20200-01
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The Pacific Scientific PMB31B-20200-01 is part of the PMB Brushless Servomotors series and features a Power Module (IGBT Module) design. It supports a maximum collector-emitter voltage of 1200V and a continuous collector current of 200A. The module weighs approximately 400g and operates within a temperature range of -40 to +125°C.
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Product Description:
The PMB31B-20200-01 Brushless Motor features a winding resistance of 7.6 Ohms, which aids effective electrical management. Made by Pacific Scientific, this motor’s shaft is constructed using a shaft seal and square key, improving security and mechanical stability in stressful conditions.
ThisPMB31B-20200-01 servo motor has a 240V AC input capability with the provision of a 320V DC bus for maximum operation flexibility in handling different system demands. This servo motor has a thermal resistance of 1.08 °C/Watt, facilitating controlled heat dissipation for long duty cycles. Engineered for dependable speed control, this motor produces a nominal speed of 2900 RPM, making it appropriate for high-cycle operations. This brushless motor’s build is strong but compact, and its weight is 2.5 kg to guarantee a smooth integration with motion systems. This motor’s feedback is controlled through a resolver encoder, a reliable option for precise position and velocity measurement in automation applications. The PMB31B-20200-01 servo motor is specified with a nominal stall current of 2.7 Arms, determining its ability to provide torque at rated stall without overloading design specifications. It has a continuous stall current of 2.66 Arms to determine the current it can sustain continuously under continuous stall torque conditions.
The PMB31B-20200-01 servo motor achieves a static friction of 0.09 Nm, thus ensuring smoothness during start-up and low speed. The torque output is one of the prominent features of this motor, with a maximum torque rating of 6.26 Nm. This torque makes this motor capable of driving high acceleration or abrupt load changes. It is also aided by a torque constant of 0.79 Nm/Arms (RMS), providing precise conversion of current to mechanical torque. This motor’s design standard meets IP40 classification for immunity against huge solid particles while assuring efficient ventilation for motor cooling.
Frequently Asked Questions about PMB31B-20200-01:
Q: How does the resolver encoder improve performance in PMB31B-20200-01?
A: The resolver encoder provides accurate position sensing under harsh conditions. It ensures noise immunity and stable feedback for consistent motor control.
Q: Why is the torque constant of 0.79 Nm/Arms significant?
A: It ensures predictable torque output based on current input. This simplifies control tuning and improves efficiency in automation systems.
Q: What benefit does the 7.6 Ohms winding resistance provide?
A: It regulates current flow to optimize energy usage. This helps balance heating and efficiency during continuous operation.
Q: How does the shaft seal extend motor life in PMB31B-20200-01?
A: The shaft seal protects against dust and contaminants. This prevents premature wear and maintains stable mechanical performance.
Q: Why is static friction rating important in servo motors?
A: A low static friction of 0.09 Nm ensures smooth starts. It reduces jerks and enhances low-speed accuracy.
