When a machine needs three-phase power but your shop only has single-phase service, you're not just buying a motor starter-you're solving a power compatibility problem. For variable frequency drives and motor speed controls, the key question is whether a single unit can handle both phase conversion and speed adjustment. This guide walks through the 1 To 3 Phase 7.5KW 10HP 220V CNC Variable Frequency Drive Inverter VFD VSD to help you decide if it fits your setup.
Quick Verdict
If you need to run a 7.5KW 10HP three-phase motor from a 220V single-phase supply, this VFD is a direct match on paper. It combines phase conversion and speed control in one unit, using SPWM (sine wave PWM) control, with adjustable frequency from 0 to 400Hz and flexible digital and analog control terminals.
Who It Suits
This drive makes sense for equipment with constant torque loads, such as air compressors and HVAC units, as well as variable torque loads like pumps and fans. It also suits shops where single-phase input is the only available power source, since the connection method is straightforward: for 1-phase input, connect the input wires to the R and S terminals. That makes it a practical candidate for CNC machinery and other three-phase equipment in a residential or light-commercial setting.
What Stands Out from the Listed Details
A few details make this VFD worth attention. It accepts 220V AC input (with +/-5% tolerance) in either 1-phase or 3-phase configuration, and outputs 3-phase 220V. That's the classic single-phase-to-three-phase conversion scenario. The frequency range of 0-400Hz gives you room beyond standard 50/60Hz operation, which can be useful for specialized spindle or fan applications. The maximum output of 20A per phase gives a clear current ceiling for matching your motor. The drive also includes multiplex terminal functions, meaning the control terminals are flexible for different wiring and automation needs.
The listed price of USD 119.34 puts this in a reasonable range for a drive that combines phase conversion with variable speed control.
Meaningful Trade-Offs
The output is 220V three-phase, so this is not a universal solution for motors wired for 380V or higher. You'll need a motor that matches that output voltage. The input voltage tolerance is +/-5%, so your supply should be reasonably stable to stay within the drive's operating window. The 20A per-phase maximum also means you need to confirm your motor's full-load current stays under that level. The single-phase input wiring uses only the R and S terminals, which is specific and easy to miss if you're used to three-phase terminal layouts.
Bottom Line
For a 7.5KW 10HP 220V three-phase motor in a single-phase shop, this VFD offers a compact, cost-effective way to add variable speed and phase conversion without needing a separate converter box. It's best suited for constant torque and variable torque loads where you want adjustable speed, not just on/off control. If the 220V output and 20A ceiling match your motor, this is a straightforward choice at the listed price.
1 To 3 Phase 7.5KW 10HP 220V CNC Variable Frequency Drive Inverter VFD VSD
At USD 119.34, this drive lists a maximum frequency of 400Hz and includes multiplex terminal functions, so it covers more than basic fixed-speed starting. The trade-off is that it outputs 220V three-phase, so it won't match motors wired for higher voltage. Before you commit, make sure your motor's voltage and current ratings line up with the 220V output and 20A per-phase limit.
