15M020D MCLENNAN | Alldatasheet

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∅ D2 ∅ D1 ∅D4 L4 ∅ D3 L8 L6 L8 Form 1A Form 2 Permanent magnet stepper motors Commercial series The M series instrument stepper motors are high quality permanent magnet types providing a choice of 18,15, 7.5 or 3.6 degree step angle. The motors may be specified fitted with gearheads where increased torque and resolution are required at reduced operating speed. The M series motors offer excellent performance combined with low pricing. They are ideally suited to instru mentation applications where large production volumes are likely. A co mprehensive programme of drives, power supplies and controllers are available for the small volume user to construct advanced single and multi-axis positioning systems. Dimensions: motor type form dimensions mm D1 D2 D3 D4 L1 L2 L3 L4 L5 L6 L7 L8 26S024B 26M048B 1 A 26.2 2.0 7.92 3.3 13.3 13.72 12.7 11.3 42.8 35 3.8 1.52

0.8 Nil

3.4 191 Specification motor type step holding rotor resistance current inductance number mass angle torque inertia per phase per phase per phase of leads or degrees Ncm Kgcm ohms amps mH terminals gms 15M020D-1B 18 0.388 0.00011 40 0.125 14 4 14 26S024B-2U 15 0.5 0.00045 118 0.1 33.8 6 28 26M048B-2U 110 0.1 36.5 26M048B-1U 7.5 0.9 0.0011 19.6 0.25 5.3 6 28 35L048B-2U 7.5 2.5 0.004 64 0.18 40 6 88 MV82801-P2 7.5 19.8 0.095 26 0.46 33 6 440 note The above motors are 4 phase units suitable for use with uni-polar or bi-polar drive circuits with the exception of the 15M029D-1B motor which is designed specifically for Bi-polar operation . Bi-polar versions of the other motors in the range are available to special order. Mclennan Servo Supplies Ltd. Tel: +44 (0)8707 700 700 www.mclennan.co.uk

FIG. 1

24 Vdc

FIG. 2 DRIVE CIRCUIT Typical permanent magnet stepper motor performance Uni-polar drive Uni-polar drive Uni-polar drive Uni-polar drive Suitable modular drives for above motors: MSE422, PVP134, PM542 Explanation of terminology The motors may be connected directly to a dc supply of the same value as the motor rating. For example, the 35L048B-2U motor is a 12 Volt rated unit and therefore may be connected directly to a 12 Vdc supply as shown in Fig 1. This is often referred to as L/R Drive For increased high speed performance however it is quite usual to connect the motor to a higher supply voltage via series resistors since the current rise time in the motor’s coils is proportional to the inductance ( L ) divided by the resistance ( R ) in the drive circuit. For example, the 42M048C-1U motor is a 5 Volt rated unit. When connected to a 24 Vdc supply via series resistors the ratio of inductance/ resistance will be greatly improved. In this case the system, as shown in Fig 2 would approximate an L/5R drive. Alternatively a more sophisticated drive system can be employed using chopped constant current techniques when the series resistors are not required. A suitable drive of this type is PM542 26 series 0.1 0.2 0.3 0.4 0.5 0 250 500 750 1000 steps per second Torque ( Ncm ) 26S024B 26M048B 35L048B series 0.5 1.5 0 500 1000 1500 steps per sec. ( 7.5 degrees ) Torque ( Ncm ) L/R Drive L/4R drive 42M048C series 0.5 1.5 2.5 3.5 4.5 0 250 500 750 1000 steps per sec. ( 7.5 degrees ) Torque ( Ncm )L/R Drive L/5R Drive 60L048 & MV82 series 0 250 500 750 1000 steps per sec. ( 7.5 degrees ) Torque ( Ncm ) L/R Drive L / 5R Drive DRIVE CIRCUIT Mclennan Servo Supplies Ltd. Tel: +44 (0)8707 700 700 www.mclennan.co.uk