Nidec Unidrive M600 Series Design Manual

Also see for Unidrive M600: Installation sheet User guide Mounting Installation Sheet Installation sheet

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Nidec Unidrive M600 Series Design Manual Manual pdf 104 page image

Safetyinformation Introduction ProductInformationSystemdesignMechanicalInstallationElectricalInstallationGettingstarted Optimization Parameters TechnicaldataComponentsizing Diagnostics ULInformation104 Unidrive M Regen Design GuideIssue Number: 4Inserting H = 2m and D = 0.6m, obtain the minimum width:= 2.8 m (111.78 in)If the enclosure is too large for the space available, it can be madesmaller only by attending to one or all of the following:• Using a lower PWM switching frequency to reduce the dissipation inthe drives• Reducing the ambient temperature outside the enclosure, and/orapplying forced-air cooling to the outside of the enclosure• Reducing the number of drives in the enclosure• Removing other heat-generating equipmentCalculating the air-flow in a ventilated enclosureThe dimensions of the enclosure are required only for accommodatingthe equipment. The equipment is cooled by the forced air flow.Calculate the minimum required volume of ventilating air from:Where:V Air-flow in m³ per hour (1 m³/hr = 0.59 ft³/min)Text Maximum expected temperature in °C outside the enclosureTint Maximum permissible temperature in °C inside the enclosureP Power in Watts dissipated by all heat sources in theenclosurek Ratio ofWhere:P 0 is the air pressure at sea levelP I is the air pressure at the installationTypically use a factor of 1.2 to 1.3, to allow also for pressure-drops indirty air-filters.ExampleTo calculate the size of an enclosure for the following:• Two M600-03400100 (1 x Regen and 1 x motoring drive) modelsoperating at the Normal Duty rating• Each drive to operate at 6kHz PWM switching frequency• External EMC filter (4200-3480) for each drive• Maximum ambient temperature inside the enclosure: 40 °C• Maximum ambient temperature outside the enclosure: 30 °CDissipation of each drive: 209 W (see Chapter 10 Technical data onpage 276).Dissipation of external EMC filter: 13 W (max) (see Chapter 10 Technicaldata on page 276).Dissipation of external Regen inductor (4401-0002): 146 W x 1(see section 10.4.2 Regen filter components for high quality/lowharmonic power supplies on page 294)Dissipation of external switching frequency filter (4401-0163): 35 W x 1(see switching frequency filter (4401-0163): 35 W x 1 (see Chapter 10Technical data on page 276).Total dissipation: ((209 x 2) + (13 + 146 + 35) = 612 WInsert the following values:Tint 40 °CText 30 °Ck 1.3P 612 WThen:= 238.68 m³/hr (140.82 ft³/min) (1 m³/hr = 0.59 ft³/min)5.6 Cubicle design and drive ambienttemperatureDrive derating is required for operation in high ambient temperatures(derating information is provided in Chapter 10 Technical data onpage 276).Totally enclosing or through panel mounting the drive in either a sealedcabinet (no airflow) or in a well ventilated cabinet makes a significantdifference on drive cooling.The chosen method affects the ambient temperature value (Trate ) whichshould be used for any necessary derating to ensure sufficient coolingfor the whole of the drive.The ambient temperature for the four different combinations is definedbelow:1. Totally enclosed with no air flow (<2 m/s) over the driveTrate = Tint + 5 °C2. Totally enclosed with air flow (>2 m/s) over the driveTrate = Tint3. Through panel mounted with no airflow (<2 m/s) over the driveTrate = the greater of Text +5 °C, or Tint4. Through panel mounted with air flow (>2 m/s) over the driveTrate = the greater of Text or TintWhere:Text = Temperature outside the cabinetTint = Temperature inside the cabinetTrate = Temperature used to select current rating from tables inChapter 10 Technical data on page 276.W 9,782 2 2× 0,6×( )–2 0,6+-----------------------------------------------------=V 3kPT int T ext–---------------------------=P oP l-------V 3 1,3× 612×40 30–----------------------------------=Regen inductors can produce significant losses with a normaloperating temperature in the region of 150 °C dependantupon the ambient temperature. Location of the Regeninductors should be considered to prevent damage to heatsensitive components or create a fire risk.CAUTION