ATO Single Phase VFD 1HP Single Phase Motor Speed Controller 220V 0.75kW Single Phase Output VFD Variable Frequency Drive (Single-Phase Input, 1-Phase Output)

I like the design. Very programmable. Self protecting. Many motor control applications. I used it for single phase slow starting motors.

I like the design. Very programmable. Self protecting. Many motor control applications. I used it for single phase slow starting motors.

I have a 4 ton heat pump that was too powerful for some of my loads. This VFD reduced the frequency of my heat pump to lower its capacity to about a 2.7 ton unit. All my loads are happy now. Technical support was great in helping with my setup. This VFD has a wide range of capabilities. I just needed a frequency reduction. An added benefit was the soft start of my heat pump. I can also monitor the amperage of my heat pump.

I wanted this drive (which is rated on its nameplate as 10 amps) to soft start an HVAC PSC single phase compressor that runs normally on a measured 6 amps. Despite much changing of the set up parameters I could not get the drive to start the compressor. The drive remained stalled taking up to 13 amps before tripping the overload. Even using the extended data for these drives on the Gozuk website to change parameters did not work. There was also very good technical support from ATO who finally agreed that my compressor motor probably had a problem with the ATO output waveform. Amazon has agreed to a full refund.

The VFD is working well for my single phase motor.The most valuable, the customer support is very responsive, and very helpful !