6 System Commissioning and Functions NICE3000
new
User Manual
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Figure 6-15 Leveling distance diagram
B
A
上
行
Down
leveling
signal
Up leveling signal
Car sill
Hall sill
Car
Leveling plate
If the car stop position is not xed at the same oor under different travels or loads, and height
deviation between the car position and the hall sill are inconsistent at the same oor , it may
be caused by improper speed loop parameters (group F2 parameters). To solve the problem,
increase the speed loop proportional gain or decrease the speed loop integral time properly.
6.2 System Functions
6.2.1 Recommended Shorting PMSM Stator Scheme
Shorting PMSM stator means shorting phases UVW of the PMSM, which produces resistance to restrict
movement of the elevator car. In îš¿eld application, an auxiliary NC contact is usually added to the NO
contact of the output contactor to short PMSM UVW phases to achieve the effect. It is feasible in theory
but may cause overcurrent actually. Due to the poor quality of the contactor and the wiring of adding the
auxiliary contact, the residual current of the controller is still high when the outputs UVW are shorted at
abnormal stop. This results in an overcurrent fault and may damage the controller or motor.
Monarch’s shorting PMSM stator scheme is as follows:
1. An independent contactor for shorting PMSM stator is installed, and the NC contact of this contactor
implements the function of shorting PMSM stator.
2. On the coil circuit of the RUN contactor, an NO contact of the shorting PMSM stator contactor is
connected in serial, to ensure that output short circuit does not occur when the parameter setting is
incorrect.
The following îš¿gure shows wiring of the independent shorting PMSM stator contactor.
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