Danfoss VLT AutomationDrive FC 360 Programming Manual

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Danfoss VLT AutomationDrive FC 360 Programming Manual Manual pdf 40 page image

4.3 Parameters: 2-** Brakes4.3.1 2-0* DC BrakeUse this parameter group to configure DC brake and DChold functions.2-00 DC Hold/Motor Preheat CurrentRange: Function:50%*[0 -160 %]Set holding current as a percentage of the ratedmotor current IM,N 1-24 Motor Current. Thisparameter holds the motor function (holdingtorque) or pre-heats the motor. This parameter isactive if [0] DC hold is selected inparameter 1-72 Start Function, or if [1] DC hold/pre-heat is selected in parameter 1-80 Function atStop.NOTICEThe maximumm value depends on therated motor current. Avoid 100% currentfor too long. It may damage the motor.2-01 DC Brake CurrentRange: Function:50%*[0 -150 %]Set current as % of rated motor current,parameter 1-24 Motor Current. DC brake current isapplied on stop command, when speed is belowthe limit set in parameter 2-04 DC Brake Cut InSpeed; when the DC Brake Inverse function isactive; or via the serial port. Seeparameter 2-02 DC Braking Time for duration.NOTICEThe maximum value depends on the ratedmotor current. Avoid 100% current for toolong. It may damage the motor.2-02 DC Braking TimeRange: Function:10 s* [0 - 60 s] Set the duration of the DC brake current set inparameter 2-01 DC Brake Current, onceactivated.2-04 DC Brake Cut In SpeedRange: Function:0 Hz* [ 0 - 400Hz]This parameter is for setting the DC brakecut-in speed at which the DC brake currentparameter 2-01 DC Brake Current is to beactive, in connection with a stop command.NOTICEParameters 2-01, 2-02 and 2-04 have no effect when1-10 Motor Construction = [1] PM, non-salient SPM.2-06 Parking CurrentRange: Function:50 %* [ 0 - 1000 %] Set current as percentage of rated motorcurrent, 1-24 Motor Current.2-07 Parking TimeRange: Function:3 s* [0.1 - 60 s] Set the duration of the parking current set inparameter 2-06 Parking Current, once activated.4.3.2 2-1* Brake Energy Funct.Parameter group for selecting dynamic braking parameters.Only valid for frequency converters with brake chopper.2-10 Brake FunctionOption: Function:[0]*Off No brake resistor is installed.[1] ResistorbrakeA brake resistor is incorporated in the system fordissipation of surplus brake energy as heat.Connecting a brake resistor allows a higher DC-link voltage during braking (generatingoperation). The brake resistor function is onlyactive in frequency converters with an integraldynamic brake.[2] AC brake Improves braking without using a brake resistor.This parameter controls an overmagnetisation ofthe motor when running with a generatoric load.This function can improve the OVC-function.Increasing the electrical losses in the motorallows the OVC-function to increase brakingtorque without exceeding the voltage limit.NOTICEThe AC brake is not as efficient asdynamic braking with resistor.AC brake is for VVC+ mode in both openand closed loop.2-11 Brake Resistor (ohm)Range: Function:Sizerelated*[ 0 -65535Ohm]Set the brake resistor value in Ω. Thisvalue is used for monitoring the power tothe brake resistor. Parameter 2-11 BrakeResistor (ohm) is only active in frequencyconverters with an integral dynamic brake.Use this parameter for values withoutdecimals.Parameter Descriptions Programming Guide38 Danfoss A/S © Rev. 2014-03-31 All rights reserved. MG06C40244