德馬格中倉行車培訓(xùn)講義 dedrive pro frequency inverters for crane drives-文庫吧
2025-07-04 21:31 本頁面
【正文】 req. = fH * fT * fU * Pmax, drive, el. Chopper output: PCh, req. = fH * fT * PCh, drive, el. fH with h = 1000 ... 2020 m hmax = 4000 m Important: Above 2020 m only on request ? ?m1 0 0 0 0m1,11h??Slide 12 DCC Cranes amp。 Components dep. 1205 Prein Dedrive Pro Determining the inverter effective and chopper output fT with T = 40 176。C Tmax = 50 176。C C100]C4,11?????? TInverter effective output: Pmax, req. = fH * fT * fU * Pmax, drive, el. Chopper output: PCh, req. = fH * fT * PCh, drive, el. Slide 13 DCC Cranes amp。 Components dep. 1205 Prein Dedrive Pro Determining the inverter effective output A lower line voltage results in a lower available effective output. The max. inverter current is not reduced in this case. Inverter effective output: Pmax, req. = fH * fT * fU * Pmax, drive, el. fU with Unom, inverter = Device rated voltage (400V, 500V or 690V) Umin = minimum operating voltage 1]V[ ]V[m i nU m r i c h t e rN e n n , ??UUSlide 14 DCC Cranes amp。 Components dep. 1205 Prein Dedrive Pro Determining the inverter current Iinverter = 1,11 * fH * fT * fF * fRV * Idrive fF = Output filter factor fF = 1 No output filter = 1,05 With an output filter The temperature and site altitude factor are determined in the same way as for the output. Influence of the voltage tolerance (+ 10 %) Slide 15 DCC Cranes amp。 Components dep. 1205 Prein Dedrive Pro Determining the inverter current Iinverter = 1,11 * fH * fT * fF * fRV * Idrive fRV = Control mode factor When a motor is used which has a rated voltage voltage corresponding to the line voltage, the factor for the control method given above is increased by a factor of 1,06. Slide 16 DCC Cranes amp。 Components dep. 1205 Prein Dedrive Pro Configurations / control methods ? Scalar process (controlled V/f characteristic) without an encoder ? Travel ? Direct torque control (DTC) without an encoder ? Travel ? Direct torque control (DTC) with an encoder ? Travel and lifting Card required for rotary encoder detection Encoder with at least 1024 division marks (HTL) Slide 17 DCC Cranes amp。 Components dep. 1205 Prein Dedrive Pro Braking resistors ? When the required inverter size has been determined, the braking resistor can be selected and/or dimensioned. ? Braking resistors can be selected for ? Standard travel applications ? Special travel and hoist applications ? The following must be considered for dimensioning: ? Regenerative output ? Cyclic duty factor (regenerative operation ? motor operation / break) ? Minimum braking resistor (to protect the brake chopper) ? Maximum braking resistor (Pbrake = U2 / Rbrake) Slide 18 DCC Cranes amp。 Components dep. 1205 Prein Dedrive Pro Braking resistors For hoist applications, a resistor capable of continuous resistance (100% CDF) should be selected if the
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