Panasonic M41A1G4L Operating Instructions Manual

Contents

– A-56 –Panasonic Corporation Electromechanical Control Business Divisionindustrial.panasonic.com/ac/e/ © Panasonic Corporation 2018 AQCTB02E 201806-E – A-57 –Panasonic Corporation Electromechanical Control Business Divisionindustrial.panasonic.com/ac/e/ © Panasonic Corporation 2018 AQCTB02E 201806-EMotor selection1. Speed suitable for useFig. 1 shows the typical torque curve, input dissipation curve andvibration curve.In Fig. 1, the motor shows variations of 1100 [r/min] to 1800 [r/min]according to the load. The speed most suitable for the load of theequipment is as follows:1200 [r/min] to 1250 [r/min] for 50 Hz1500 [r/min] to 1550 [r/min] for 60 HzIn this speed range, as can be seen from Fig. 1, the inputdissipation becomes minimum, which means that the temperaturerise of the motor is reduced accordingly.As a result, the life of the motor, the insulation life, ball bearinggrease life, etc. in particular, is prolonged. Also the vibration isminimized: in particular the gear noise caused when a gear head isused is reduced optimally. As described above, an optimum speedshould be considered in selecting a motor.2. Examination of load of equipmentExamine the torque required for the load regarding the followingthree items.• Minimum required torque at starting of the equipment• Maximum load torque at load variations of the equipment• Load torque at stable rotationWhen the load torque is (1) to (4) in Fig. 2, the starting torque for(1), the stalling torque for (2) both the starting torque and stallingtorque for (3) and (4) should be considered.Life expectancy of motor varies depending on load fluctuation. To determine the life expectancy, a factor calledservice factor, as shown in the table below is used.First choose the appropriate service factor according to thetype of load and multiply the result by the required power to determine the design power.• Standard life expectancy• Service factorConstantLight-impactMedium-impactHeavy-impactBelt conveyor, One-directional rotationStart/Stop, Cam-driveInstant FWD/REV, Instant stopFrequent medium-impact5 hours/day0.81.21.52.5Service factor8 hours/day1.01.52.03.024 hours/day1.52.02.53.5Type of load Typical loadBall bearingMetal bearingRight-angleLife (hours)10000 hours*2000 hours5000 hoursW (Overhung load)F (Thrust load)dLL2L2M4GA FMX6G B(A)MX6G M(A)MX7G B(A)MX7G M(A)MX8G BMX8G MMX9G BMX9G MMZ9G BMY9G BMR9G BMP9G BMX9G RMZ9G R4.422114422664488661321768813220 (2)98 (10)49 (5)196 (20)98 (10)294 (30)196 (20)392 (40)294 (30)588 (60)784 (80)392 (40)588 (60)3.36.68.811223333223315 (1.5)29 (3)39 (4)49 (5)98 (10)147 (15)147 (15)98 (10)147 (15)42 mm sq.(1.65 inch sq.)Size ModelMX G, MZ9G, MY9G, MR9G, MP9G typePermissibleoverhung load(W)Permissiblethrust load(F)42 mm sq.Round shaftfor C&B motorLife (hours)2000 hours10000 hours*5000 hours* 5,000 hours when used on reversible motorThe overhung load is defined as a load applied to the output shaft in theright-angle direction. This load is generated when the gear head is coupled tothe machine using a chain, belt, etc., but not when the gear head is directlyconnected to the coupling. As shown in the right figure, the permissible valueis determined based on the load applied to the L/2 position of the output shaft.The thrust load is defined as a load applied to the output shaft in the axialdirection. Because the overhung load and thrust load significantly affect thelife of the bearing, take care not to allow the load during operation to exceedthe permissible overhung load and thrust load shown in the table below.The standard life can be expected when the product is operated at service factor 1.0.The life of a component during particular application is estimated by dividing the standard life expectancy by theservice factor. If the service factor is 2.0, then the actual life will be one half the expected life.Torque curveVibration curveInput dissipation curve1100Speed (r/min)1500 1800TorqueN·m (kgf·cm)Fig. 1 Example of VariousCharacteristics (60 Hz)Fig. 2 Type of Load(Speed)Torque0 (Rated speed)(1)(2)(3)(4)3. Calculation of required torque• When the load of the equipment is (1), (3) or (4) in Fig. 2Calculate the approximate value of the required starting torque Ts. InFig. 3 (Conveyor), for example, calculate the required force F from“T = Fr”. Then select suitable motors from our catalog or the attachedS-T data and check the minimum starting voltage, the minimum stablevoltage and the speed in stable rotation. In accordance with theequipment load status calculated based on the above-mentionedexamination, select a motor with the most suitable S-T curve.Fig. 3. Example of belt ConveyorrF4. Measurement of minimum starting voltageCouple the motor to the load to be measured and connect a variabletransformer and voltmeter as shown in the figure to the right.Increase the voltage continuously from 0 volt at the rate of 3 V/secwith this variable transformer and measure when the rotating part ofthe equipment starts and gets ready for acceleration.Variable transformer5.Measurement of minimum stable voltageDrive the equipment in a stable state. Using the above-mentioned variable transformer, decrease the voltagegradually. Measure the voltage at the limit of the motor speed allowing the equipment to function, that is, whenthe equipment begins to stop.N (kf) lbf N (kf) lbf1 W3 W3 W to 6 W10 W to 15 W15 W to 25 W20 W to 60 W40 W60 W to 90 W60 W90 W to 150 W4P2P4P4P4P2P4P4P2P2P8.88.8111124263556263339 (4)39 (4)49 (5)49 (5)108 (11)118 (12)157 (16)255 (26)118 (12)147 (15)1.5 (0.15)1.5 (0.15)7 (0.7)7 (0.7)12 (1.2)12 (1.2)20 (2)20 (2)20 (2)20 (2)42 mm sq.(1.65 inch sq.)60 mm sq.(2.36 inch sq.)70 mm sq.(2.76 inch sq.)80 mm sq.(3.15 inch sq.)90 mm sq.(3.54 inch sq.)60 mm sq.(2.36 inch sq.)70 mm sq.(2.76 inch sq.)80 mm sq.(3.15 inch sq.)90 mm sq.(3.54 inch sq.)90 mm sq.(3.54 inch sq.)High torque90 mm sq.(3.54 inch sq.)Right-angleSize OutputPermissibleoverhung load(W)Permissiblethrust load(F)N (kf) lbf0.30.31.51.52.62.64.44.44.44.4N (kf) lbfMotorunit(roundshaft)Overhung load and thrust loadCalculation of motor capacityService factor

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