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AC Servo Motors and Gearheads

AC Servo Motors and Gearheads
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AC Servo Motors and Gearheads

Product catalog summary
Overview
Baldor has been a leader in energy-efficient industrial motors since the 1920s, expanding into servo and motion control in 1983. The company offers a wide range of servo motor solutions, emphasizing reliability, innovation, and customer satisfaction.
Product Offerings
  • BSM C-Series: Low and standard inertia brushless servo motors designed for high performance and reliability.
  • BSM N-Series: Features low inertia and high torque for excellent performance response, utilizing Neodymium Iron Boron magnetics.
  • SSBSM-Series: Stainless steel servo motors for harsh environments.
  • Servo Rated Gearheads: Includes low backlash planetary gearheads and stainless steel gearheads.
Key Features
  • High temperature and moisture-resistant designs for durability.
  • Wide variety of feedback devices and mounting options.
  • Innovative features like auto-commissioning and auto-tune wizards for ease of use.
  • Agency approvals (UL/CSA/CE/BISSC) ensuring quality and safety.
Performance and Applications
Baldor's servo motors are used in high-performance industrial applications such as robotics, factory automation, and machine tools. They offer high torque to inertia ratios, rapid positioning capabilities, and are available in various configurations to meet specific application needs.
Technical Specifications
The document provides detailed specifications for various models, including continuous stall torque, peak torque, speed ratings, and electrical characteristics. The BSM N-Series, for example, offers continuous stall torques from 3.9 lb-in to 354 lb-in, with peak torques four times the continuous rating.
Conclusion
Baldor provides comprehensive motion control solutions with a focus on quality, reliability, and customer support. Their products are designed to enhance productivity, improve quality, and reduce costs in demanding industrial environments.
Specifications and Safety Considerations
The document emphasizes that the brake is a safety feature and not intended for deceleration of loads. Special considerations are necessary when mounting brake/encoder motors vertically, and detailed engineering drawings are available upon request.
Servo Motor Selection
Choosing a motion control package involves understanding the mechanics of the load, including friction and inertia. Friction can be measured or estimated, while inertia requires calculation. The document outlines methods for calculating inertia based on different mechanical linkage systems: direct drive, gear drive, tangential drive, and ballscrew drive.
Calculating Servo Motor Requirements
Direct Drive: The simplest system where load parameters do not need to be reflected back. Equations for speed, torque, and inertia are provided.
Gear Drive: Involves reflecting load parameters back to the motor shaft. Equations for speed, torque, and inertia are given, with an example calculation.
Tangential Drive: Requires reflecting load parameters back to the motor shaft, with formulas for speed, torque, and inertia.
Ballscrew Drive: Similar to tangential drive, with additional considerations for ballscrew inertia and preload torque.
Move Profile and Torque Calculations
The move profile defines acceleration, run time, speed, and deceleration. The document provides equations for calculating acceleration torque, continuous torque over the duty cycle, and RMS torque. An example calculation is provided, demonstrating the need for the motor to supply sufficient torque to overcome friction and inertia.
Specifications and Requirements:
The document outlines the torque requirements for a specific application, which is 7.73 lb-in (0.86 N-m). The motor selected can provide a continuous torque of 14 lb-in (1.6 N-m). The control or drive (amplifier) must supply sufficient acceleration current and continuous current for the application’s duty cycle.
Control Section:
Acceleration current is calculated using the formula: Iacc = Tacc / KtHOT, where KtHOT is the derated motor torque constant. The RMS current required is calculated similarly, ensuring the control can supply 3.18 amps for acceleration and 1.78 amps continuously.
Temperature Approximation:
The motor winding temperature is determined by power dissipation and thermal resistance. The document provides formulas to calculate power dissipation and temperature rise, ensuring the motor operates within its design limits of 155 deg C.
Temperature Rise:
The temperature rise over time is described using an exponential model, with key points plotted to show the rise to steady state temperature. The document provides an example calculation for a motor with specific power dissipation and thermal resistance.
Servo Motor Requirement Sheet:
This section includes a template for specifying application details, including load conditions, velocity profile, and other operational parameters.
Quick Selection of Planetary Gearheads:
The document provides guidance on selecting gearheads based on input torque ratings, emphasizing the importance of not exceeding these ratings to prevent damage. It discusses the use of current limiting to protect gearheads and the importance of considering duty cycles in gearhead selection.
Duty Cycle Considerations:
Different duty cycles (S1 and S5) are explained, with recommendations for gearhead selection based on these cycles. The document advises on using electronic ramping to control loads and the potential for emergency stops.
Gearhead Life Extending Considerations:
Recommendations are provided for extending gearhead life, such as using larger gearheads, operating at lower speeds, and maintaining appropriate temperatures. The document also discusses the impact of radial and axial loads on gearhead performance.
Conversion Tables:
The document includes conversion tables for rotary inertia and torque, providing a reference for converting between different units.
Material Densities: The document provides density values for various materials in different units: Aluminum, Brass, Bronze, Copper, Plastic, and Steel. For example, Aluminum has a density of 2.72 gm/cm3.
Mechanism Efficiencies: Efficiency values are given for different mechanisms such as Acme Screws, Ball Screws, Helical Gears, Spur Gears, and Timing Belt/Pulley, with Ball Screws having the highest efficiency at 0.9.
Friction Coefficients: Coefficients for sliding friction between different material pairs are listed, such as Steel on Steel (0.58) and Plastic on Steel (0.20).
Temperature Conversion: Formulas for converting between Fahrenheit and Celsius are provided.
Gravity: The acceleration constant is given as 9.8 m/s2.
Conversion Tables: Extensive tables for converting units of length, power, mass, force, and linear velocity are included.
Servo Drive Solutions: Details on Baldor's VS1SD Servo Drive, including features like an easy-to-use keypad, auto-tuning, and compatibility with various power ratings.
Brushless Servo Motors: Information on Baldor's FlexDrive-II, Flex+Drive-II, and MintDrive-II, highlighting their high performance and compatibility with different feedback options and fieldbusses.
Motion Controllers: The NextMove series is described as high-performance controllers for coordinated motion, enhancing manufacturing efficiency.
Motor Solutions: Baldor's servo motors are noted for their reliability and suitability for industrial applications, with options for harsh environments.
Linear Motors and Stages: Baldor offers a wide range of linear motors and stages, emphasizing their precision and speed advantages.
Integrated Stepper Motor and Drive: The DSMS integrates a micro-stepping drive with a stepper motor, offering a compact solution with reduced wiring.
DC Servo Motors: Baldor's DC servo motors provide continuous torque and are designed for demanding industrial applications.
Contact Information: Contact details for Baldor's offices worldwide are provided for further inquiries.
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Catalog excerpts

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table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:5.00pt "Franklin Gothic Medium", sans-serif; } .font1 { font:7.00pt "Franklin Gothic Medium", sans-serif; } BSM C-Series Performance Curves B5M132C-6200AA BSM132C-7200AA

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table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:42.00pt "Courier New", monospace; } .font1 { font:4.00pt "Franklin Gothic Medium", sans-serif; } .font2 { font:11.00pt "Franklin Gothic Medium", sans-serif; } .font3 { font:12.00pt "Franklin Gothic Medium", sans-serif; } .font4 { font:35.00pt "Franklin Gothic Medium", sans-serif; } .font5 { font:6.00pt "Tahoma", sans-serif; } Prcision Gearheads Designed specifically for BSM Servo Motors Par ci tory so.nt : ■rlc;.isnr.;t1 loi' kiwi ai):il ■ratin.-i's ^.iiini.iii" wri.ion. djrability and long (rouble free op霩ration....

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table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:4.00pt "Franklin Gothic Medium", sans-serif; } .font1 { font:5.00pt "Franklin Gothic Medium", sans-serif; } .font2 { font:6.00pt "Franklin Gothic Medium", sans-serif; } .font3 { font:7.00pt "Franklin Gothic Medium", sans-serif; } Characteristlcs of Standard Planetary Gearheads MRP 090 No of Stases Hatlo 3 4 | 5 | 7 | 10 16 | 20 25 35 | 40 | 50 70 | 100 «««1^.1111 2.18 2. 21 .40 44. 50 4.S 46 45 42 4.1 44 M 44 4.2 40 3.S KiHiiill) 52 45 3rc-n,lns 12 Mal Lՙd N/l±l HH0H5O MRP 120 No Ol Stages 1 - Stage 2 - Stages Rated...

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*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.