DI885 3BSE013088R1
ABBDI8853BSE013088R1由同步电动机的同步转速公式和转差率公式n1=60f/PS=(n1-n)/n1可得出异步电动机的转速公式n=60f(1-S)/P由上式可见,异步电动机的调速,可采用改变电源频率f、改变转差率S和改变磁场磁极对数P等三种方法。(1)改变电源频率这种调速方法以采用交流电源为前提。一般采用可控硅变频调速系统,先将交流电变换为电压可调的直流电,然后再变换为频率可调的交流电。由于变频设备复杂,价格高昂,因而限制了这种调速方法的推广引用。(2)改变转差率这种调速方法只适用于绕线式转子异步电动机,因为通常在转子回路中串联电阻,通过改变转子回路的电阻来改变转差率,以进行调速。一般只有绕线式转子才能够通过滑环和电刷在机外连接调速电阻。这种调速方法功率损耗大、效率低,很少用来调整机床电动机的转速。(3)改变磁极对数由于磁极对数只能成对改变,因此只能是有级调整,一般可做到二速、三速或四速调速。机床上常用的是由三角形接线改为双星形接线,以对电动机进行从四级变为二极的二速调速。Rexroth4WRZ25W8-325-70Rexroth3WEH16A7-71Rexroth4WRZ10W8-50-70H+LSLE02.1-120PallHH3343F20RexrothPV7-17BERARMA02PVS363FL​RMJAHNS-HYDRAULIKMTZ4M11EA7RacinePVT-PSS0-25CR-0​1VISCOTHERM107SVALFAFeldmannnC50RexrothPGP2-22RexrothZDRE6VP3-10RexrothC14RexrothDB20-3-50HERION24104000-25FluidTeam01700124VHERION7033130ALFAC6231X10RexrothR900512505RexrothDB15G1-52RexrothDBDS15G18ParkerGR-2HRLS23MBOSCH0810091242KugelhahnPN400ASCODMXX-2FTALFAC6171X10Rexroth2FRM6B7630Römheld1815304904Rexroth4WE6D62RexrothDR6DP3-53RexrothLFA25DB2-71Rexroth4WE6J62Parker3309111070CARTERPBSC38.1-350ParkerCTC-2HRL24MCHYDRAULIKHRYA10C2HydacHDA3700-E-250-1​56MAHLEPIS-3060WIKA23330100adixCPV10-MG14-T-NCGÖTZETÜVSV113181​5DRexrothZ2S6264RexrothHSZ06A21731RexrothZ2DB6VD342BOSCH0510515004MeWestaNG68312640RexrothZ2FS6-5-44RexrothR901086081RexrothR901086051BochHED8OA20SUNRBAP-MANParkerPSB160***1A5SUNCBBCLAN9DW6SUNPRDBLDN0KX4SUNDAAAMHNSUNRB***BNDKL8HAWEMVG13HR-PYDSUNPRDB-LWNSUNDTDA-MCNPIABP3010104272SUNCCCA-LANHydac0160MA003BN314609RexrothR900316232Herion08101071081SUNECV9FX8SUNUKWO0104478SUNDFCA8DNMAHLEHC347504194SUN760224Hydac0060D003BNHCHydac0060D003BN3HCHydac0030D020BH4HCHydac0060D005BN3HCSUNCXCD-XCNSUN770-224MannW940/1)
厦门渤格电气技术有限公司
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