Zapi AC-2, Руководство пользователя

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chapter 5.4 for more explanation.
2.3.4 Speed feedback
The motor control is based upon the motor speed feedback. The speed
transducer is an incremental encoder, with two phases shifted at 90°. The
encoder can be of different types:
-
power supply: +5 V or +12 V
- electric output: open collector ( NPN or PNP), push-pull, line driver
- standard (A and B) or differential
) B B, , A (A,
output.
For more details about encoder installation see also chapter 4.6.
2.4
U
Protection features
1) Battery polarity inversion
It is necessary to fit a MAIN CONTACTOR to protect the inverter against
reverse battery polarity and for safety reasons.
2) Connection Errors
All inputs are protected against connection errors.
3) Thermal protection
If the controller temperature exceeds 75 °C, the maximum current is reduced
in proportion to the thermal increase. The temperature can never exceeds
100 °C.
4) External agents
The inverter is protected against dust and the spray of liquid to a degree of
protection meeting IP54.
5) Protection against uncontrolled movements
The main contactor will not close if:
-
The Power unit is not functioning.
- The Logic is not functioning perfectly.
- The output voltage of the accelerator does not fall below the minimum
voltage value stored, with 1 V added.
- Running microswitch in closed position.
6) Low battery charge
When the battery charge is low, the maximum current is reduced to the half
of the maximum current programmed.
7) Protection against accidental Start up
A precise sequence of operations are necessary before the machine will
start.
Operation cannot begin if these operations are not carried out correctly.
Requests for drive, must be made after closing the key switch.
2.5 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
5.4).
- Stable speed in every position of the accelerator.
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