HOISTS andCRANES

CRANES

(A)

(B)

HOIST

TRANSLATION

HOIST

Power supply

Brakingresistor

Brake’s command

Gearbox

HoistMotor

Load

Bridge

Brake

Electric cabinet

Braking unit

Penta

Configuration withBraking Resistor• One inverter is used

ELECTROMECHANICAL BRAKE / 1

Settings of Multifunction Digital Output (MDO)for electromechanical brake command

Digital Outputs Menu

P297 MDO4: Digital output mode ABS BRAKE

P298 MDO4: Variable A selection A80: Torque Demand

P299 MDO4: Variable B selection A73: Ramp Out

P300 MDO4: Testing variable A >

P301 MDO4: Testing variable B

P302 MDO4: Comparing value for Test A 20.00%

P303 MDO4: Comparing value for Test B 50.00 rpm

P304 MDO4: Function applied to the result of the two tests

(A) Set (B) Reset Rising Edge

P305 MDO4: Output logic level TRUE

ELECTROMECHANICAL BRAKE / 2

Settings for Master-Slave Operation (Torque Sharing)

Crane Menu

C300 Torque before Start for Positive Speed [*] 50%

C301 Time for Torque before Start for Positive Speed [**] 300ms

C300a Torque before Start for Negative Speed [*] 50%

C301a Time for Torque before Start for Negative Speed [**] 300ms

C302 MDI for Closed Brake [***] MDI8

[*] torque value reached before the speed ramp starts after sending a START command

[**] delay time passing between the START command and the speed ramp starts

[***] when the brake closure is detected after a deceleration ramp, the current required for motor fluxing is injected into the motor

ELECTROMECHANICAL BRAKE / 3

HOIST with TWO INVERTERS

Braking resistor

Brake’s command

Brakingresistor

Load

Bridge

Power supply

Brakingunit

Hoist (Argano)

Gearbox

MotorBrake

Fig. 1

Gearbox

Motor

Brakingunit

Brake

Brake’s commandBy Pass.

Penta Penta

Master Slave

Configuration w/Torque Sharing• Possibility to have a reduced operation at 50% power in case of failure of one inverter

HOIST with TWO INVERTERS / MASTER-SLAVE

Settings for Master-Slave Operation

Analog Outputs Menu andMotor Configuration Menu

MASTER:

P177 AO1 -> Displayed Quantity Selection 10:Torque Demand

P182 AO1 -> Minimum Value 0.0V

P183 AO1 -> Maximum Value 10.0V

C011 Type of Reference Speed

SLAVE:

C011 Type of Reference Torque

HOISTS and CRANES

HOIST

Power supply

Brake’s command

Gearbox

HoistMotor

Load

Bridge

Brake

Electric cabinet

Penta Penta RGN

Configuration withRegenerative Unit(AFE)• Energy is not dissipatedduring regeneration• No external resistors

HOIST with REGENERATIVE UNIT / 1

HOIST with REGENERATIVE UNIT / 2

HOIST with REGENERATIVE UNIT / 3

HOIST

Configuration withUltracapacitor• Energy is stored in Ultracapacitor

Fig. 1 – Topologia del sistema

C1: AC/DC ConverterC2: DC/AC Bidirectional ConverterC3: DC/DC Bidirectional ConverterSC: Ultracapacitor BankM3: Motor

ULTRACAPACITOR / 5

ULTRACAPACITOR / 1

Regenerative Power (energy recuperation)Ultracapacitors can absorb and store virtually all regenerative energy and then be applied when a sudden burst of power is required for lifting.The stored electrical energy in ultracapacitors is then available to assist in lifting or hoisting to reduce fuel consumption and accompanying emissions, and perform other electrical functions as necessary.

ULTRACAPACITOR / 2

Ts=Td=T0; Ts=time up, Td=time down.P1=Power during up movementP2=Power during down movement

Energy absorbed during up movement: W1=P1*T0Energy generated during down movement:W2=P2*T0

Working cycle

ULTRACAPACITOR / 3

Power as seen by C1 converter:

Pr: Max Power absorbed from AC grid K: constant between 0 and 1, depending on the dimensions of the storage system.

Power absorbed from

Mains Grid

ULTRACAPACITOR / 4