PG DRIVES TECHNOLOGY AC TRACTION – MOTOR SET-UP EXAMPLE
1 Example Set-up Procedure
If no detailed information is available, the motor label can be used to generate the set-up values. Below is an example of a
typical motor label from a Chinese motor manufacturer.
The following information is shown.
Motor Type
Type: 132/4-195
Power: 8kW Frequency: 44Hz Speed: 1280RPM
Voltage: 34V Current: 190A
Rating: S2 60min Insulation: F
This motor has a nominal rating of 8kW for 60 minutes.
8 kW is delivered at 44Hz, (rotor speed 1280rpm). The required voltage is 34Vrms and the current is shown as 190A.
To begin with, the number of pulses per revolution of the encoder and the number of poles in the motor must be programmed
into the controller. The keyswitch must then be cycled.
This information is vital; if the encoder pulses or the number of poles is wrong, you can get high
motor currents or possibly a runaway motor.
Let us assume that in this case, the parameter 4.3 Number of Teeth is set to 64 and the parameter 4.4 Number of Motor Poles is
set to 4.
1.1 Drive speed set-up
The next step is to define the 4 speed points that form the motor graph for voltage and slip. As described in the Motor Set-up
chapter, each speed point has got a separate setting for the maximum voltage and maximum slip.
The 4 speed points should be programmed as follows.
• Motor Speed Minimum, set to 0Hz.
• Motor Speed Boost, set to 70% of the base speed shown on the motor label, in this example 30Hz.
• Motor Speed Base, set to the base speed shown on the motor label, in this example 44Hz.
• Motor Speed Maximum, set to 1.5 times Motor Speed Base value or 10% higher than the maximum motor
rpm required, whichever is greater, e.g. 125Hz.
SK79646-01 6
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