PMB31D-00116-01
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The PMB31D-00116-01 is a NEMA Size 34 brushless servomotor delivering a continuous stall torque of 2.11 Nm and a peak torque of 6.26 Nm. Manufactured by Pacific Scientific as part of the PMB Brushless Servomotors series, it features a 4096 ppr digital encoder with commutation and weighs 2.5 kg.
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Product Description:
Pacific Scientific company engineered PMB31D-00116-01 servomotor offers a thermal time constant of 28 min which defines how long the winding takes to approach steady-state temperature. It also supports thermal duty modelling for intermittent cycles. The weight for this drive is 2.5 kg which reduces inertia and informs bracket and transport planning during installation. Torque constant equals 0.79 Nm per ARMS to convert commanded current into predictable torque.
The voltage constant measures 0.49 VRMS per rad/sec which links electrical frequency to back-EMF and assists in motor speed estimation inside the drive. Current at peak torque is 8.0 ARMS to indicate short-duration current capability and helps size transient drive protection for acceleration events. Offering line-to-line resistance equals 7.6 ohms which determines I²R losses and aids calculation of steady-state heating and supply voltage margin. Further, line-to-line inductance measures 19.6 mH which sets current loop bandwidth and guides drive tuning to control current ripple. With the use of flying leads with AMP connectors, it provides keyed, serviceable terminations and supports reliable mating during maintenance. NEMA Size 34 standardizes flange and bolt pattern and thus simplifies mechanical integration into existing systems.
The 4096 ppr is the encoder resolution enables finer closed-loop position control for precise indexing. The unit PMB31D-00116-01 specifies a digital encoder with commutation which supplies both position feedback and commutation signals and hence allows direct electronic commutation by the drive. Stack length multiple of “1” maintains the standard stator length and simplifies envelope and spare part selection for the variant. Nominal stall current at max 240 VAC is 5.4 ARMS which adjust the stall current baseline. Also, its continuous stall torque equals 2.11 Nm maintains sustained torque capability and guides cooling and duty-cycle planning for continuous operation.
Frequently Asked Questions about PMB31D-00116-01:
Q: What operational guidance follows from the current at peak torque rating for PMB31D-00116-01?
A: The 8.0 ARMS current at peak torque for PMB31D-00116-01 indicates the short-term current the motor draws under peak torque conditions which engineers use to set transient drive limits.
Q: What does the thermal time constant mean for PMB31D-00116-01 and how should it be applied?
A: The thermal time constant of 28 minutes for the component defines the time scale for significant winding temperature change.
Q: What handling and mounting considerations follow from the listed weight of PMB31D-00116-01?
A: With a weight of 2.5 kg, the device allows bracket stiffness and lifting requirements which informs mounting hardware selection, shipping calculations, and fixture design.
Q: How does the torque constant for PMB31D-00116-01 influence drive scaling and motion profiling?
A: A torque constant of 0.79 Nm per ARMS for PMB31D-00116-01 provides the conversion factor from current to torque which enables precise calculation of required current for target torque.
Q: How is the voltage constant used when configuring PMB31D-00116-01 with a servo drive?
A: The voltage constant of 0.49 VRMS per rad/sec links rotor speed to generated back-EMF which allows the drive to compute expected voltage at given speeds.
