7.5 hp (5.5 kW) Single Phase Output VFD

Factory price 7.5 hp 1 phase VFD, specialized design for single phase AC induction motor speed controls, 220V - 240V 32 amps, manufacturer direct sale.
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7.5 hp single phase variable frequency drive, 5.5 kW, 1 phase 220V - 240V for single phase AC motor.

GoHz single phase output VFDs work for both L-N-G motors and split phase (L1-L2, +N, G) motors.


Basics Model GK3000-1S0055
Capacity 7.5 hp (5.5 kW)
Shipping weight 9 kg
Dimension 330*200*200 mm
I/O Feature Rated current 32 A
Input voltage single phase AC 220V±15%
Input frequency 47~63Hz
Output voltage 0~rated input voltage
Output frequency V/f control: 0~500Hz
Over load capacity 150% of rated current for 60s, 180% of rated current for 10s, 200% of rated current for 3s
Control Features Control mode V/f control
Operation command mode Keypad control, Terminal control, Serial communication control
Frequency setting mode Digital setting, analog setting, pulse frequency setting, serial communication setting, multi-step speed setting & simple PLC, PID setting, etc. These frequency settings can be combined & switched in various modes.
Starting torque 1 Hz/150%
Speed adjustment range 1:50
Carrier frequency 1.0-16.0kHz, automatically adjusted according to temperature and load characteristics
Frequency accuracy Digital setting: 0.01Hz
Analog setting: Maximum frequency * 0.05%
Torque boost Automatically torque boost; manually torque boost: 0.1%~30.0%
V/f curve Three types: linear, multiple point and square type (1.2 power, 1.4 power, 1.6 power, 1.8 power, square)
Acceleration/deceleration mode Straight line/S curve; four kinds of acceleration/deceleration time, range: 0.1s~3600.0s
DC braking DC braking when starting and stopping
DC braking frequency: 0.0Hz~maximum frequency, braking time: 0.0s~100.0s
Jog operation Jog operation frequency: 0.0Hz~maximum frequency
Jog acceleration/deceleration time: 0.1s~3600.0s
Simple PLC & multi-step speed operation It can realize a maximum of 16 segments speed running via the built-in PLC or control terminal.
Built-in PID Built-in PID control to easily realize the close loop control of the process parameters (such as pressure, temperature, flow, etc.)
Automatic voltage regulation Keep output voltage constant automatically when input voltage fluctuating
Control Function Common DC bus Common DC bus for several VFDs, energy balanced automatically
Torque control Torque control without PG
Torque limit "Rooter" characteristics, limit the torque automatically and prevent frequent over-current tripping during the running process
Wobble frequency control Multiple triangular-wave frequency control, special for textile
Timing/length/counting control Timing/length/counting control function
Over-voltage & over-current stall control Limit current & voltage automatically during the running process, prevent frequent over-current & over-voltage tripping
Fault protection function Up to 30 fault protections including over-current, over-voltage, under-voltage, overheating, default phase, overload, shortcut, etc., can record the detailed running status during failure & has fault automatic reset function
Input/output terminals Input terminals Programmable DI: 7 on-off inputs, 1 high-speed pulse input 2 programmable AI:
AI1: 0~10V or 0/4~20mA
A12: 0~10V or 0/4~20mA
Output terminals 1 programmable open collector output: 1 analog output (open collector output or high-speed pulse output)
2 relay output
2 analog output: 0/4~20mA or 0~10V
Communication terminals Offer RS485 communication interface, support MODBUS-RTU communication protocol
Human machine interface LED display Display frequency setting, output frequency, output voltage, output current, etc.
Multifunction key QUICK/JOG key, can be used as multifunction key
Environment Ambient temperature -10℃~40℃, derated 4% when the temperature rise by every 1℃ (40℃~50℃).
Humidity 90%RH or less (non-condensing)
Altitude ≤1000M: Output rated power, >1000M: Output derated
Storage temperature -20℃~60℃

Note: The single phase motor should Not be adjusted to run based on a lower frequency than 80% of its rated frequency for along time, otherwise the motor may fail.

Single phase induction motor has specific wiring requirements in connecting with GoHz single phase VFD, to enable your single phase motor running properly, please follow below instructions step by step:

Wiring instruction of removing motor capacitor
Remove capacitor of the single phase motor, connect the common terminal Z2/U2 (single phase motor has two windings) to the VFD's V phase, connect the other two windings U1/V1 & Z1 to the U & W phase of the VFD output terminals.
Power on the VFD, set P9-13=0, run the VFD and observe the current. If the current is too high, stop the VFD, set P0-15=10, P1-02=160, and run again. If the current still too high, stop the VFD and switch the motor connection of U & W phase.
GoHz VFD wiring for single phase induction motor


Wiring instruction of keeping motor capacitor
Connect single phase motor input lines (L, N) to the VFD's (V, U).
Power on the VFD, set P9-13=0, run the VFD and observe the current. If the current is too high, stop the VFD, set P0-15=10, P1-02=160, and run again. If the current still too high, stop the VFD and switch the VFD's U phase to W phase.
GoHz VFD wiring for single phase motor without disassembling capacitors

Download GoHz single phase motor wiring instructions (pdf).

Tips: Main circuit of single phase VFD

The main circuit of the VFD is the power conversion part that provides voltage regulation and frequency regulation power to the asynchronous motor. The main circuit can be roughly divided into two types: the voltage type is a frequency converter that converts the DC of the voltage source into an AC, and the filter of the DC circuit is a capacitor. The current type is a frequency converter that converts the DC of the current source into an AC, and its DC loop filter is an inductance. It consists of a rectifier, a smoothing loop and an inverter.

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