Zapi AC-2 User Manual download pdf (Page 20)

Page - 20/72 ADEZP0DC - AC-2 FLASH INVERTER - User Manual

5 OPERATIONAL FEATURES

- Speed control.

- Optimum behaviour an a slope due to the speed feedback:

- the motor speed follows the accelerator, starting a regenerative braking

if the speed overtakes the speed set-point.

- the system can perform an electrical stop on a ramp (the machine is

electrically hold on a slope) for a programmable time (see also chapter

8.4).

- Stable speed in every position of the accelerator.

- Regenerative release braking based upon deceleration ramps.

- Regenerative braking when the accelerator pedal is partially released

(deceleration).

- Direction inversion with regenerative braking based upon deceleration ramp.

- Regenerative braking and direction inversion without contactors: only the

main contactor is present.

- The release braking ramp can be modulated by an analog input, so that a

proportional brake feature is obtained.

- Optimum sensitivity at low speeds.

- Voltage boost at the start and with overload to obtain more torque (with

current control).

- The inverter can drive an electromechanical brake.

- Hydraulic steering function:

1) traction inverter

- the traction inverter sends a "hydraulic steering function" request to

the pump inverter on the can-bus line (see also OPTIONS chapter

8.4).

- moreover, if the pump inverter is not present (for ex: tractor

application), the traction inverter can manage an "hydraulic steering

function" by driving a hydro contactor which drive a hydraulic steering

motor (output F9), see also OPTIONS chapter.

2) pump inverter

- the pump inverter manage an "hydraulic steering function". That is, it

drives the pump motor at the programmed speed for the

programmed time.

- High efficiency of motor and battery due to high frequency commutations.

- Self diagnosis with indication of the fault shown by a flashing led.

- Modification of parameters through the programming console.

- Internal hour-meter with values that can be displayed on the console.

- Memory of the last five alarms with relative hour-meter and temperature

displayed on the console.

- Test function within console for checking main parameters.

5.1 Diagnosis

The microcontroller continually monitors the inverter and carries out a diagnostic

procedure on the main functions. The diagnosis is made in 4 points:

1) Diagnosis on key switch closing that checks: watchdog circuit, current sensor,

capacitor charging, phase's voltages, contactor drives, can-bus interface, if the

switch sequence for operation is correct and if the output of accelerator unit is

correct.

2) Standby diagnosis in standby that checks: watchdog circuit, phase's voltages,

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Zapi AC-2 User Manual Page 20

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