Yaskawa G5HHP Drive - Manual (Page 65)

3.7 Installing and Wiring PG Speed Control Cards
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3.7.5 Selecting the Number of PG (Encoder) Pulses
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PG-A2/PG-B2
The maximum response frequency is 32,767 Hz.
Use a PG that outputs a maximum frequency of approximately 20 kHz for the rotational speed of the motor.
Motor speed at maximum frequency output ( r∕min )
60
× PG rating ( p∕rev ) = 20, 000 Hz
Some examples of PG output frequency (number of pulses) for the maximum frequency output are shown
in Table 3.10.
Table 3.10 PG Pulse Selection Examples
Motor’s Maximum Speed (r/min) PG Rating
(p/rev)
PG Output Frequency for Maximum
Frequency Output (Hz)
1800 600 18,000
1500 800 20,000
1200 1000 20,000
900 1200 18,000
Note 1.The motor speed at maximum frequency output is expressed as the sync rotation speed.
2. The PG power supply is 12 V.
3. A separate power supply is required if the PG power supply capacity is greater than
200 mA. (If momentary power loss must be handled, use a backup capacitor or other meth-
od.)
PG power supply
Capacitor for power mo-
mentary power loss
Signals
Fig 3.19 PG-B2 Connection Example
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PG-D2/PG-X2
Both 12V and 15V are available as PG power supply. Verify the PG power supply specifications before
connection.
The maximum response frequency is 300 kHz.
Use the following equation to computer the output frequency of the PG (fPG).
f
PG
( Hz ) =
Motor speed at maximum frequency output ( r∕min )
60
× PG rating ( p∕rev )
A separate power supply is required if the PG power supply capacity is greater than 200 mA. (If momentary
power loss must be handled, use a backup capacitor or other method .)
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