Delta Electronics VFD-S manual 3kHz, 10kHz, 115V/230V/460V Series

Chapter 5 ParametersVFD-S Series

Frequency	Frequency
output
	output
frequency
	frequency
motor	motor
speed
	speed

			Time			Time
operation		stops according to		operation		free run to stop
	RUN	decel eration time			RUN	STOP
command		STOP		command

ramp to stop and free run to stop

2-03

PWM Carrier Frequency Selections Unit: 1

	115V/230V/460V Series
Power	0.25 to 3hp (0.2kW to 2.2kW)
Setting Range	d3 to d10 kHz
Factory Setting	d10 kHz

This parameter determines the PWM carrier frequency of the AC motor drive.

Carrier	Acoustic	Electromagnetic	Heat	Current
Frequency	Noise	Noise or leakage	Dissipation	Wave
		current
3kHz	Significant	Minimal	Minimal	Minimal

10kHz

Minimal

Significant

Significant

Significant

From the table, we see that the PWM carrier frequency has a significant influence on the electromagnetic noise, AC motor drive heat dissipation, and motor acoustic noise.

2-04Motor Direction Control

		Factory Setting: d0
Settings	d0	Enable forward/reverse operation
	d1	Disable reverse operation

The parameter determines whether the AC drive can operate in the reverse direction.

Revision August 2008, SE09, SW V2.61 5-29