TECO A510s - Direction Lock Selection; Carrier Frequency; Carrier Frequency Settings; Cable Length and Carrier Frequency

4-237
11-Auxiliary Parameters
11-00 Direction Lock Selection
Range
0:
Allow forward and reverse rotation
1: Only allow forward rotation
2: Only allow reverse rotation
If motor operation direction is set to 1 or 2, the motor can only operate in that specific direction. Run commands in
the opposite direction are not accepted.
Forward or reverse commands can be issued via the control terminals or keypad.
Note: The Direction Lock Selection can be used in fan and pump application where reverse rotation is prohibited.
11-01 Carrier frequency
Range
0: Carrier Output Frequency Tuning
1: 1KHz
2~16: 2~16KHz
Notes:
(1) Value 1 to 16 represents KHz.
(2) When 11-01=0, variable carrier frequency is used see parameter 11-30~11-32.
(3) For SLV and SV mode, the minimum value of 11-01 is 4 kHz.
(4) Setting range is determined by the inverter rating (13-00) and HD/ND mode (00-27).
(5) Refer to section 3 inverter derating based on carrier frequency.
(6) A low carrier frequency increases motor noise but reduces motor losses and temperature.
(7) A low carrier frequency decreases RFI, EMI interference and motor leakage current.
Refer to the carrier frequency Table 4.4.14.
Table 4.4.14 Carrier frequency settings
Carrier frequenc
y
(
11-01=2 to 16
))
2KHz--6K--10K--16KHz
Motor noise
High -------------------- Low
Output current waveform
Fair --------------------- Better
Noise interference
Low--------------------- high
Leakage current
Low--------------------- high
If cable length between the inverter and the motor is too long, the high-frequency leakage current will cause an
increase in inverter output current, which might affect peripheral devices. Adjust the carrier frequency to avoid this
as shown in table 4.4.15.
Table 4.4.15 Cable length and carrier frequency
Wire length < 30 Meter (98ft)
up to 50 Meter
(164 ft)
up to 100 Meter
(328ft)
> 100 Meter*
> 328ft
Carrier frequency
(11-01 value )
Max. value 16KHz
(11-01=16KHz)
Max. value 10KHz
(11-01=10KHz)
Maxi. value 5KHz
(11-01=5KHz)
Max. value 2KHz
(11-01=2KHz)
*. If Cable is longer than 200m, the output dv/dt filter or output reactor is required.
Notes:
(1) Reduce the carrier frequency if the torque does not match the speed.
(2) In V/F and V/F + PG control modes, the carrier frequency is determined by parameters 11-30 (Carrier
frequency max. limit), 11-31 (Carrier frequency lower limit) and 11-32 (Carrier frequency proportional gain).