6674.260 ? MR 74 AC servo motors
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AC Servo Motors with High Power Density AC servo motors with rated torques between 0.1 and 70 Nm and eight different flange sizes, rated speeds up to 6,000 r.p.m., other speeds on request. All motors are available with brakes. Main Characteristics • maintenance-free, since brushless • high dynamics • compact dimensions due to high-performance neodymium magnet material • built-in resolver for sinusoidal commutation, other position sensors as options ESR Drive System Packages MR 74 servo motors are adapted to the digital and analog ESR servo drives. Servo drives and servo motors with or without gearbox, complete with position sensors and, if required, brakes are avail- able as drive system packages. For further infor- mation, see the back of this data sheet. Positioning and feed movements with high dy- • Handling and assembly systems • Electronics production machinery • Semiconductor production machinery • Measuring and testing machinery • Optical discs production machinery (CDs, • Machine tools and metal working machinery • Packaging machinery • Textile machinery • Plastics processing machinery • Coiling machinery • and many other applications

Contents Operating Principle of a Servo Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Construction of the Servo Motors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Type Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....

Construction types and equipment An overview of the different types and the available equipment (holding brake, key, etc.) is given in the type code below. Special design In addition to the stated types and equipment, special designs are possible, e. g. motors with hollow shafts, special flange, adjusted winding, etc. Motors with highgrade steel flange and shaft, e. g. for applications in the foods industry, are also available. If required, please contact ESR. Type Code The type code clearly identifies a servo motor equipped in a certain way. Example: Frame size and rotor length Xx first...

* K = without brake (-M0), K1 = with brake (-MS) - referring to motors with resolver (-G01), other dimensions see respective drawings All dimensions in millimeters. CAD files are available on request (DXF/2D). ESR Pollmeier GmbH, 64372 Ober-Ramstadt, phone +49 6167 9306-0, fax +49 6167 9306-77, www.esr-pollmeier.de

Mechanical Data Mounting standards Mounting positions Construction types Flange accuracy Bearings lubrication Vibration intensity Protection Class Flange motor, flange according to DIN 42 677; special flange on request Abbreviation acc. to DIN IEC 34 part 7: IM B 5; special construction types on Standard acc. to DIN 42 955; higher accuracy on request Connector, rotatable (except for MR 740x: cable connection and MR747x: straight High-quality light-alloy Rotor dynamically balanced according to vibration intensity stage R, S according Rotor with rare earth permanent magnets IP 65, shaft...

Electrical Data General The motors are three-phase synchronous motors with 3 pole pairs. They comply with the DIN EN 60034-1 (VDE 0530) Rules for Electrical Machines. The motors are designed for connection to servo drives with DC-bus voltages of 320 V or 560 V, see back of this data sheet. Other voltages on request. Insulation class F acc. to DIN VDE 0530. Suitable for use in tropical climates. The rated output in the technical specifications applies to operating conditions defined according to DIN EN 60834-1 (VDE 0530): installation location below 1000m above sea level, cooling air...

Optical position sensors: High-resolution incremental encoder (Option -G06) Sincos (Hiperface) encoder (Option -G09 and -G10) EnDat encoder (Option -G11 and -G12) In connection with the digital servo drives and the ESR multi-axis servo system, a high-resolution incremental encoder, a Sincos (Hiperface) encoder, or an EnDat encoder (with optical position acquisition) can be used. The high resolution improves control quality and smooth running. Furthermore, by using analog incremental signals a reduction of the band width is achieved compared to the transmission of the actual position value...

Holding Brake General The optional holding brake is a permanent-magnet brake. The supply voltage of The brake is designed as holding brake, it usually serves for holding the motor shaft at standstill. Occasional load brakings, e. g. in case of an emergency-stop, are permitted. It is recommended to protect the brake rectifier using a voltage- dependent resistor (varistor). Function The braking force is generated by permanent magnets. There is no air gap in the magnetic circuit. To lift the brake, a magnetic field of opposing polarity to the permanent magnet is built up. A spring element...

Torque Increase at Intermittent Duty S3 General The typical working cycle of a servo drive consists of load phases in which the motor runs at high speed or torque interrupted by periods in which it is operated at reduced power or is standing still. Therefore, the design of the drive should not only consider the desired rated speed but the ratio of load and rest phases to specify a drive which meets the requirements optimally. Operating modes in compliance with VDE 0530 The servo drive technology differs between the following operating modes: C S1 = continuous duty C S3 = intermittent duty;...

Selection Criteria for Servo Motors and General Overview Selection criteria Major criteria for selecting a servo motor are: C standstill torque M0 200 C rated speed nN C torque at rated speed MN C ratio moment of inertia Jmotor to Jload On the basis of rated current IN, the corresponding servo drive or servo power module is selected for the motor. General overview Values for standstill torque and rated speed can be found in the overview below. For an assignment of servo motors to ESR servo drives or servo power modules, see page 11ff (320 V) and page 16ff (560 V). All other electrical and...