Quick verdict
Choosing between these two motor controls comes down to the job the motor has to do. If you need to run a three-phase motor from a 220V single-phase supply, the findmall 1 To 3 Phase 7.5KW 10HP 220V CNC Variable Frequency Drive Inverter VFD VSD is the more complete unit. If the motor is already single-phase and simply starts hard, the Single Phase Motor Soft Starter Single-phase Soft Starting Module Soft Start gives you a gentler startup for about USD 68.35 less.
At a glance
| Product | Listed price | What it does |
|---|---|---|
| findmall 1 To 3 Phase 7.5KW 10HP 220V CNC Variable Frequency Drive Inverter VFD VSD | USD 119.34 | Converts 220V single- or three-phase input to 220V three-phase output. |
| Single Phase Motor Soft Starter Single-phase Soft Starting Module Soft Start | USD 50.99 | Soft-starts a single-phase motor with adjustable start voltage and ramp time. |
Where each product wins
- Pick the VFD when you want one unit that handles both phase conversion and speed control. Its SPWM control, 20A per-phase rating, and multiplex terminals suit constant-torque loads like hard-starting air compressors and HVAC units, as well as variable-torque loads like pumps and fans. The drive accepts 220V input on R and S terminals and outputs three-phase 220V, with frequency adjustable from 0 to 400 Hz.
- Pick the soft starter when the motor is single-phase and the issue is only at startup. The module gives you a start potentiometer and a soft-start potentiometer, so you set the starting voltage and how quickly the voltage ramps up to full, with a maximum ramp time around 30 seconds. That is a more direct solution when you do not need to change running speed.
Product notes
1 To 3 Phase 7.5KW 10HP 220V CNC Variable Frequency Drive Inverter VFD VSD
The findmall VFD is the do-more option in this pairing. It can serve as a motor speed control and a phase converter: feed it 220V from a single-phase line (or three-phase line) and it outputs three-phase 220V for a 7.5KW, 10HP motor. The control mode is SPWM, input frequency is rated at 48-63 Hz, and the unit is listed for up to 20A per phase. Two sets of terminal functions give you digital and analog control terminals, so it is comfortable with constant-torque loads such as hard-starting air compressors and HVAC units and variable-torque loads such as pumps and fans. The catch is that you are paying for speed control and phase conversion even if your application only needs a smooth start. If variable speed is not part of the plan, the VFD is more machine than the startup problem requires.
Single Phase Motor Soft Starter Single-phase Soft Starting Module Soft Start
This soft starter focuses on the first few seconds of a single-phase motor's run. It uses a start potentiometer to set the initial voltage and a soft-start potentiometer to control the ramp up to full voltage, with a maximum ramp time of about 30 seconds. The model designation is SSR-60WA-R1 (2KW), so it is sized for a 2KW-class single-phase motor rather than a three-phase motor. That makes it a straightforward add-on for a single-phase pump, fan, or other fixed-speed motor that starts hard. The limit is equally clear: it only manages the starting phase. You do not get adjustable running speed, and it cannot convert single-phase power to three-phase. For those jobs you need the VFD.
Final choice by use case
- Need to run a three-phase 220V motor from a single-phase line? Choose the 1 To 3 Phase 7.5KW 10HP 220V CNC Variable Frequency Drive Inverter VFD VSD.
- Need a simple way to smooth out startup on a single-phase 2KW-class motor? Choose the Single Phase Motor Soft Starter Single-phase Soft Starting Module Soft Start.
