1. Overview
Converting an industrial lathe from a direct-on-line (DOL) two-speed induction motor to a Variable Speed Drive (VSD) is one of the most effective retrofits available to a machine shop. A modern VSD replaces the contactor stack, the mechanical pole-change switch, and the start winding protection with software-configurable soft start, programmable acceleration ramps, integrated thermal modeling, and selectable speed presets. The Yaskawa V1000 (CIMR-VU series) is a compact, sensorless vector drive well suited to this application because it accepts 200 V class single-phase input, regenerates a true three-phase output, exposes a generous programmable I/O complement, and ships with an inbuilt PLC for sequence logic.
This reference covers the engineering design of a 4 kW (5 HP) VSD conversion for a 220 V three-phase two-speed induction motor on a 230 V single-phase utility supply. The control architecture follows a Yaskawa V1000 drive with:
- Type B 63 A RCD at the distribution board for harmonic-tolerant ground fault protection.
- Lockable rotary isolator at the machine.
- 3% line impedance AC choke (provisioned but not fitted initially).
- Yaskawa-recommended EMC filter on the input side.
- Independent cooling fan on a 5 A MCB.
- 24 VDC power supply for relay coils and LED indication.
- Programmable V1000 I/O for forward/reverse run, jog, fast stop, coolant enable, and two preset speeds.
- Digital panel meters driven from the analog monitor outputs for spindle speed and motor load.
The article is written for an electrical designer or maintenance engineer responsible for building the control panel, programming the drive, and commissioning the machine. Where a parameter or function is drive-specific, the official Yaskawa V1000 technical documentation set should be treated as the controlling reference; this article reproduces the conventions but does not substitute for the parameter manual.
2. Drive Selection and Sizing
The original two-speed 3-phase motor on a typical mid-size Nardini-class lathe is rated 3.9 kW on the nameplate with a peak mechanical load that has been measured (by other owners) to approach 6 kW on heavy cuts. The replacement VSD must therefore be sized to deliver continuous current equal to or greater than the motor's full-load current, and short-term overload current to support the constant-torque region of the speed range.
| Model (CIMR-VU2A) | Continuous Output Current (A) | Motor kW (ND) | Motor HP (ND) | Input Phases | Fuse/Breaker (A) |
|---|---|---|---|---|---|
| 0020 | 17.5 | 3.7 | 5 | 1 or 3 | 40 |
| 0030 | 25.0 | 5.5 | 7.5 | 1 or 3 | 50 |
| 0040 | 33.0 | 7.5 | 10 | 1 or 3 | 70 |
The V1000 catalog rating at 17.5 A continuous / 4 kW is adequate for a 3.7 kW continuous load, with a 150% overload for 60 s available to absorb the inrush of heavy facing cuts. The key caveat is the single-phase input derating, addressed in the next section.
1.73 × I_3ph_output for the same mechanical power, because the full kW must flow through two wires instead of three. Always size upstream wiring, breaker, and RCD to single-phase nameplate current, not to the 3-phase rating.
3. Single-Phase Input Derating
The Yaskawa V1000 user manual permits single-phase input on 200 V class models with an explicit derating factor. For the CIMR-VU2A0020 (17.5 A), the continuous output current rating must be reduced to approximately 15.3 A when the drive is wired L1 + L2 (or L1 + L3) with L3 (or L2) left open. The procedure in TOEPC71060641 requires parameter C6-01 set to 1 (Heavy Duty rating) to enforce the lower ceiling automatically, and parameter L8-03 left at factory default to enable the output phase loss detection.
For a 4 kW single-phase fed drive, the upstream protective device must be sized as follows. With the derated 15.3 A three-phase output driving a 4-pole 50 Hz 4 kW motor, the input single-phase current will be:
I_line = P_motor / (V_LL × PF × η) (single-phase) = 4000 / (230 × 0.85 × 0.95) ≈ 21.5 A RMS, plus rectifier ripple and VSD switching losses. A 40 A Type B MCB provides the headroom needed for the 1.5–2× inrush during pre-charge.
| Quantity | 3-Phase Input | Single-Phase Input |
|---|---|---|
| Supply voltage | 3 × 230 V + N | 1 × 230 V + N |
| Drive output current | 17.5 A | 15.3 A (derated) |
| Approx. supply current | 14.5 A | 21.5 A |
| Recommended MCB | 25 A Type C | 40 A Type B |
| Earth leakage device | 30 mA Type B | 63 A / 30 mA Type B |
4. Main Power Circuit Design
The panel layout divides into three zones: incomer and filtering on the left, the V1000 in the center, and motor / load terminations on the right. Wire colors follow IEC 60446 conventions: brown (L), black (L1), grey (L2), blue (N), and green/yellow (PE).
4.1 Incomer
- Distribution-board RCD: 63 A, 30 mA, Type B (essential for VFD loads - Type AC RCDs misfire on the high-frequency leakage of the rectifier front end). A 63 A device is selected to also feed an adjacent workshop circuit without nuisance tripping.
- Lockable rotary isolator at the machine, IP65 minimum, mounted on the rear of the enclosure. Padlockable in the OFF position for lockout/tagout compliance with ISO 14118.
- Branch circuit fuse or MCB sized per the V1000 installation manual (40 A for the 0020 frame on single-phase input).
- Line contactor: AC-3 rated, coil voltage 230 VAC or 24 VDC per design, with mechanical interlock aux. The contactor is controlled by a push-button station at the operator panel, not by the drive, so that power can be removed in software-disabled states.
4.2 DC Link and Braking
The V1000 has an internal braking transistor on frames 0020 and larger. For a lathe, a small dynamic braking resistor (DBR) is recommended to absorb the energy of decelerating the spindle and chuck assembly. The minimum resistance for the 200 V 17.5 A frame is 16 Ω. A 200 W continuous / 4 kW peak aluminum-clad resistor mounted on the enclosure sidewall is sufficient. Wire the DBR between B1 and B2 terminals with the conductor kept short and twisted to limit radiated emissions.
4.3 Output Reactor and Cable
For cable runs between the V1000 and the lathe motor in excess of 10 m, fit a V1000-spec output reactor (code 3G3IV-PUZB40, or equivalent from the Yaskawa accessories catalog) to limit dV/dt and reflected-wave voltage at the motor terminals. Use a symmetric 4-core CY-type cable (e.g., 4G2.5 mm²) for the motor feeder, with the PE conductor bonded at both ends and the shield bonded to the drive ground bar via a 360° gland.
5. Harmonic Mitigation: Chokes and EMC Filters
A diode-rectifier VSD draws current in narrow pulses near the AC peak, generating significant harmonic current (predominantly 5th and 7th). On a single-phase supply feeding a small machine-shop distribution transformer, the worst symptom is flicker on neighboring loads. Two mitigation devices should be provisioned, but installed conditionally based on measurement.
5.1 AC Line Reactor (3% Impedance)
A 3% line reactor is mounted between the contactor and the drive input. For the 0020 frame on single-phase supply, a 25 A continuous / 50 A peak reactor is appropriate. The reactor is wired with provision (terminal block with jumper) so it can be inserted after measurement confirms the harmonic emission is unacceptable. The 3% impedance also softens the inrush during DC bus pre-charge.
5.2 DC Link Choke
The V1000 supports an optional DC link choke (Yaskawa catalog UZDA-B) connected to terminals +1 and +2. The DC choke is more effective per ampere than the AC line reactor at reducing input current distortion (THDi from ~80% down to ~40%) and is the preferred mitigation when the drive is fed from a single-phase source. The chassis has provision for the choke on the lower heatsink bracket.
5.3 EMC Filter
Yaskawa publishes a filter selection table for the V1000 in the installation manual. For the 200 V 17.5 A frame, the recommended filter is the Schaffner FN3270H-25-33 or equivalent (e.g., TDK B84143A0025R166). The filter must be mounted within 30 cm of the drive input terminals, with the input cable and the drive input cable kept physically separated from the output cable to the motor. Bond both filter housings to the backplane ground bar with a short, wide braid.
| Component | Catalog | Rated Current | Function | Fit by Default? |
|---|---|---|---|---|
| AC line reactor 3% | UZBA-B / 3G3IV-PUI 25A | 25 A | Limit di/dt, reduce harmonics | No, on measurement |
| DC link choke | UZDA-B for VU2A0020 | 25 A | Reduce input THDi to ~40% | Provisional |
| EMC input filter | FN3270H-25-33 / B84143A0025R166 | 25 A | Conducted emissions to EN 61800-3 | Yes |
6. 24 VDC Control Power and Coolant Pump Interface
A separate 24 VDC power supply is required for relay coils, the interface/isolating modules, and the LED pilot lamps. A 100 W DIN-rail switch-mode supply (e.g., Phoenix Contact QUINT-PS-100 or equivalent) provides adequate headroom for the coil inrush of three or four relays and the LED indicators. The 0 VDC is bonded to the cabinet ground bar at one point only to avoid ground loops that inject noise into the analog reference signals.
6.1 Coolant Pump Relay
The V1000 has a programmable photo-coupler output (P2/PC) that can be set (parameter H2-02 = 0, "During Run") to close whenever the drive is in the Run state. This is wired into a 24 VDC relay (Phoenix PLC-RSC-24DC/21) whose output contact closes a separate AC-3 contactor that feeds the coolant pump. A switch on the operator panel enables or disables coolant; when enabled, the yellow "Coolant On" LED illuminates and the pump runs only while the spindle is running. This prevents the operator from leaving the pump running dry.
6.2 Operator Panel LEDs
All pilot lamps are 24 VDC LED indicators with built-in current-limiting resistors. The color scheme follows the original lathe factory convention: red for fault, yellow for coolant enable, green for run, blue for preset-1 selected, red for preset-2 selected (distinct from fault by location and labeling), and white for variable-speed mode.
7. Spindle Control I/O Mapping
The Nardini apron lever provides forward, stop, and reverse. The two detents on the lever close switches wired to V1000 digital inputs S1 and S2. Both are configured as momentary; the drive's internal PLC latches the run command and tracks the direction. The control architecture uses the V1000's built-in PLC (function set of parameters U2 through U9) to implement the interlock logic without an external controller.
| Terminal | Function (H1-xx) | Value | Source |
|---|---|---|---|
| S1 | H1-01 | 40 (Forward Run, 2-wire) | Apron Fwd switch |
| S2 | H1-02 | 41 (Reverse Run, 2-wire) | Apron Rev switch |
| S3 | H1-03 | 6 (Jog, 1 = jog fwd, 0 = jog rev) | Self-centering jog pot |
| S4 | H1-04 | 8 (External Fault, NC) | NC feed limit / Door interlock |
| S5 | H1-05 | 14 (Fault Reset) | Reset push-button |
| S6 | H1-06 | 3 (Multi-step speed ref 1) | Preset selector position 1 |
| S7 | H1-07 | 4 (Multi-step speed ref 2) | Preset selector position 2 |
| Terminal | Function (H2-xx) | Value | Drives |
|---|---|---|---|
| MA-MB-MC | H2-01 | 0 (During Run) | Spindle running contactor (after MC delay) |
| P1-PC | H2-02 | 37 (During Run 2) | Coolant pump enable (via relay) |
| P2-PC | H2-03 | E (Fault) | Red fault lamp |
7.1 NC Feed Limit and Door Interlock
The lathe originally has no electrical feed limit, so the NC limit switch (mounted on the apron) and the cabinet door interlock are wired in series into S4 as External Fault inputs. When the door opens or the feed limit is reached, the V1000 trips on "EFx" (External Fault) and executes the fast stop sequence described in Section 8. The feed limit is calibrated to disengage the leadscrew at the carriage stroke end, replicating the function of the original mechanical clutch.
7.2 Jog Control
The jog switch is a self-centering rotary switch. The two contact directions close to ground through S3 and to 24 VDC through a separate path, providing the jog forward and jog reverse commands. Parameter d1-09 (Jog Reference) is set to 10 Hz to keep the jog speed within safe manual-setting limits.
8. Emergency Stop and Safe Stop Behavior
The lathe is fitted with a panel-mounted emergency stop button and a kick switch on the operator platform. Both are latching, palm-style, and conform to ISO 13850. The two E-stop contacts are wired in series into the V1000's hardware baseblock circuit (terminals H1-HC and H2-HC), which when opened disables the gate signals to the IGBT bridge within 1 ms. This is the "safe torque off" function; the drive will not restart until the E-stop is released and the run command is re-asserted.
8.1 Fast Stop Sequence
In addition to the hardware baseblock, a software "fast stop" is configured by parameter b1-03 (Stopping Method Selection) = 4 (Fast Stop). When the E-stop is activated, the V1000 ramps the output frequency to zero at the rate defined by C1-09 (Fast Stop Time), typically 0.5–1.0 s, rather than free-wheeling the spindle. The motor acts as a generator into the DC bus, and the braking resistor dissipates the kinetic energy of the chuck and workpiece.
8.2 Output Contactor Drop-Out Delay
The drive's relay output MA-MB-MC is configured to open after a programmed delay (C1-11 / H2-01 timer extension via PLC block), typically 10 s after the fast-stop command. This is implemented by writing a small ladder block in the inbuilt PLC. The purpose is to ensure the spindle has actually stopped before power is removed from the cable run, eliminating the risk of contactor chatter during the fast-stop ramp.
8.3 Restart Lock-Out
After any E-stop activation, the run command must be removed and re-applied to restart. This is enforced by the V1000's 2-wire control mode and the H1-01 = 40 / H1-02 = 41 input functions, which are level-sensitive rather than edge-sensitive. The operator must move the apron lever to Stop and then to Forward/Reverse to resume.
9. Speed Reference and Preset Configuration
The original two-speed motor had fixed speeds defined by the pole-pair winding. The V1000 can replicate these two fixed speeds exactly using multi-step speed references, while also offering a continuously variable speed via the operator panel potentiometer.
| Parameter | Function | Value | Notes |
|---|---|---|---|
| b1-01 | Frequency reference source | 1 (Analog input A1) | Default for variable speed |
| b1-02 | Run command source | 1 (Digital inputs) | S1, S2 for run, S3 for jog |
| d1-01 | Preset 1 (low speed) | 25.0 Hz | Matches original low speed ≈ 750 rpm |
| d1-02 | Preset 2 (high speed) | 75.0 Hz | Matches original high speed ≈ 2250 rpm |
| d1-09 | Jog reference | 10.0 Hz | ≈ 300 rpm jog speed |
| H3-02 | A1 input gain | 100.0% | 10 VDC = 100 Hz |
| H3-03 | A1 input bias | 0.0% | 0 VDC = 0 Hz |
| E1-04 | Maximum output frequency | 80.0 Hz | Allow headroom above 50 Hz base |
| E1-06 | Base voltage | 220 VAC | Motor nameplate |
9.1 Preset Selector Switch
The three-position rotary switch on the operator panel selects between Preset 1, Preset 2, and Variable. The switch is wired to inputs S6 and S7, which are mapped to multi-step speed ref 1 and multi-step speed ref 2 respectively. The truth table is:
| Switch Position | S6 | S7 | Active Reference | Indicator |
|---|---|---|---|---|
| Preset 1 (Low) | 1 | 0 | d1-01 (25 Hz) | Blue LED |
| Preset 2 (High) | 0 | 1 | d1-02 (75 Hz) | Red LED |
| Variable | 0 | 0 | A1 (Potentiometer) | White LED |
| Invalid | 1 | 1 | Held at 0 Hz | Both LEDs off, fault logged |
9.2 V/f Pattern
The V/f pattern (parameters E1-04 through E1-13) must match the motor nameplate. For a standard 50 Hz 220 V delta-connected induction motor, the pattern is a straight line from 0 Hz/0 V to 50 Hz/220 V, with no field-weakening region used (the maximum 80 Hz reference is reached by increasing the voltage proportionally only up to 50 Hz, then constant-voltage above). Set E1-07 = 1.0 (no boost) for a modern efficient motor; set E1-08 = 8% for a lightly-loaded older motor that needs torque boost at low speed.
9.3 Acceleration and Deceleration
Acceleration time (C1-01) is set to 5.0 s from 0 to maximum frequency. Deceleration time (C1-02) is set to 3.0 s. Fast stop time (C1-09) is set to 0.5 s for the E-stop condition. S-curve (C2-01 and C2-02) is set to 0.2 s at the start and end of the ramp to soften the mechanical shock on the leadscrew nut.
10. Fault Indication and Analog Monitor Outputs
The V1000 stores the last 10 faults in the U3 monitor group and exposes the most recent fault code on the LED operator. The fault relay (P2/PC) is wired to a red LED on the panel and to a 24 VDC buzzer (with manual mute). The fault codes most likely to appear on a lathe installation are:
| Code | Name | Typical Cause | Field Action |
|---|---|---|---|
| OC | Overcurrent during accel | Locked rotor, accel too short, V/f pattern wrong | Increase C1-01, verify E1-04/06 |
| OV | DC bus overvoltage | Decel too fast, missing DBR | Install braking resistor, increase C1-02 |
| OH1 | Drive overheat | Cooling fan blocked, ambient > 50 °C | Clean heatsink, check fan operation |
| OL1 | Motor overload | Cutting load too high for rating | Reduce feed/depth, check L1-01 setting |
| EF0 | External fault from option | Door interlock open | Close door, verify S4 wiring |
| EF3 | External fault on S3 | Jog switch stuck | Release jog, replace switch if needed |
| UV1 | DC bus undervoltage | Supply dip, contactor chatter | Check contactor coil, L2-02 ride-through |
| CE | Modbus/comm error | Noise on RS-485 | Shielded cable, 120 Ω terminator |
10.1 Analog Monitor Outputs (AM, AC)
The V1000 provides a single analog monitor output (AM terminal, with AC as signal common) configurable via parameter H4-01. For a lathe, two useful signals are spindle speed (output frequency) and motor load (output current). The simplest instrumentation is:
- AM → frequency-to-voltage converter (1 Hz = 0.1 VDC) → digital panel meter scaled 0–200.0 Hz (representing 0–6000 rpm on a 4-pole motor).
- A second AM output is not available on the V1000 (only one AM terminal); for power indication, install a separate current transformer on the output phase and feed a 0–10 VDC panel meter, or use the V1000's serial interface to an external display.
Configure H4-01 = 102 (Output Frequency) with H4-02 (gain) = 50.0% and H4-03 (bias) = 0.0% to give 0–10 VDC over 0–50 Hz. The panel meter's scaling can be tuned to read 0–2500 rpm directly using the calibration trim on the meter.
11. Commissioning Procedure
Follow this sequence in order. Do not energize the motor output until step 6.
- Visual inspection. Verify all terminals are torqued to the values in the V1000 installation manual (control terminals 0.5–0.6 N·m, power terminals 2.5–3.0 N·m for the 0020 frame). Check that the EMC filter is bonded to ground at both ends and that the PE conductor is continuous from the isolator to the motor frame.
- Insulation test. Megger the motor feeder (with the drive disconnected) at 500 VDC. Reading should be > 100 MΩ. Megger the supply side after the contactor is open.
- Power-on with motor disconnected. Close the isolator and the line contactor. Verify the V1000 powers up with no fault indication. Navigate to monitor U1-01 (frequency reference) and confirm it reads 0.00 Hz. Verify the 24 VDC supply is at 24.0 ± 0.5 V.
- Input check. With motor still disconnected, close the Fwd switch. The drive should display "Run" with output frequency 0.00 Hz. Open the switch. Repeat for Rev. Cycle each input (S1 through S7) using the monitor U1-10 (input status) to confirm wiring polarity.
- Analog check. Apply 0/5/10 VDC to terminal A1 in turn. The displayed reference (U1-01) should track 0.0/25.0/50.0 Hz (with H3-02 = 100%).
- Output check, no load. Reconnect the motor. With the chuck empty, command 5 Hz forward. Verify rotation direction. If reversed, swap any two of the motor U/V/W leads. Increase to 50 Hz in 5 Hz steps, listening for abnormal noise and feeling for vibration at each step.
- Auto-tune. Run the motor nameplate auto-tune (T1-01 = 0, rotational; T1-02 = motor rated kW; T1-03 = motor rated voltage; T1-04 = motor rated current; T1-05 = motor base frequency; T1-06 = motor poles; T1-07 = motor rated speed). The drive will lock the motor to a standstill and apply pulses to identify stator resistance, leakage reactance, and rotor time constant. Save the result to A1-03 = 1 (Initialize using user parameters).
- Full speed test. Run unloaded to 75 Hz (the high preset). Monitor motor current (U1-03) — should be < 50% of rated current at no load. Monitor DC bus voltage (U1-07) — should be ≈ 320 VDC at 230 VAC input. Verify the AM output reads 7.5 VDC ± 0.1 V at 75 Hz output.
- Load test. Make a facing cut. Verify current rises smoothly and the drive does not trip on OC or OL1. Verify the coolant pump starts and stops in synchronism with the spindle.
- E-stop test. Press the E-stop button while running at 50 Hz. Verify the spindle ramps down within 1 s, the red fault lamp illuminates, and the line contactor drops out 10 s later. Reset and confirm normal restart.
12. Verification and Acceptance Test
Document the following values at the end of commissioning, in a label affixed inside the cabinet door:
| Parameter | Value | Measured / Set |
|---|---|---|
| Supply voltage L1-N | 230 VAC | ____ V |
| Supply current at 50 Hz no-load | — | ____ A |
| Motor nameplate kW | 3.7 (or as fitted) | ____ kW |
| Auto-tune result (T1-12 rotor time const) | — | ____ ms |
| Preset 1 output frequency | 25.0 Hz | ____ Hz |
| Preset 2 output frequency | 75.0 Hz | ____ Hz |
| Jog output frequency | 10.0 Hz | ____ Hz |
| E-stop ramp time | 0.5 s | ____ s |
| Braking resistor fitted? | Yes/No | ____ |
| DC link choke fitted? | Yes/No | ____ |
| AC line reactor fitted? | Yes/No | ____ |
| EMC filter fitted? | Yes (Schaffner FN3270H-25-33) | ____ |
| Type B RCD trip test (30 mA) | < 30 ms at 30 mA | ____ ms |
13. Field Notes and Caveats
- The V1000's built-in PLC supports up to 100 ladder steps, which is more than enough for the fast-stop delay and the multi-step reference logic. The program is loaded via DriveWizard or the LCD operator's PRG input.
- Single-phase input on the V1000 is on terminals L1 and L2 (with L3 left open). On some import models the convention is L1 and L3; verify against the wiring diagram printed on the front cover of the specific drive before energizing.
- Type B RCDs are mandatory for VFD loads in residential and light-commercial environments. Type AC RCDs (the most common in older distribution boards) will nuisance-trip due to the DC leakage component of the rectifier front end.
- If the lathe has an existing encoder or tachogenerator, the V1000 can be configured for closed-loop vector control (A1-02 = 3) using the PG-B2 option card. For a 4 kW lathe retrofit, sensorless vector (A1-02 = 1) is generally sufficient and avoids the encoder wiring.
- The 24 VDC control supply should be on a separate MCB from the V1000 so that a fault on the drive does not disable the fault lamp, the coolant interlock, or the E-stop baseblock.
What Yaskawa V1000 model do I need for a 4 kW lathe motor on single-phase 230 V?
Use the CIMR-VU2A0020. It is rated 17.5 A continuous on 3-phase input and approximately 15.3 A on single-phase input after derating. The 0020 frame supports both 1-phase and 3-phase input on the 200 V class. For a heavier continuous load, step up to the CIMR-VU2A0030 (25 A) with the same input flexibility.
Do I need to derate the V1000 when running on single-phase input?
Yes. The 200 V class V1000 must be derated to approximately 87% of the 3-phase output current rating when fed from single-phase supply (terminals L1 and L2 only, L3 open). Set parameter C6-01 to 1 (Heavy Duty rating) to enforce the lower ceiling automatically. The upstream protective device and supply wiring must be sized to the single-phase input current, not the 3-phase rating.
How do I wire the E-stop so the V1000 performs a controlled fast stop rather than free-wheeling?
Wire the E-stop contacts in series into the hardware baseblock terminals H1-HC and H2-HC for safe torque off, and assign one digital input (typically S3 or S4) to the Fast Stop function via H1-xx = 15 (Fast Stop, NC). Set b1-03 = 4 (Fast Stop) and C1-09 to the desired ramp time, typically 0.5–1.0 s. The drive will decelerate along the ramp and the braking resistor will absorb the regenerative energy.
Why does the V1000 trip on UV1 or CE immediately on a single-phase input?
UV1 (DC bus undervoltage) on a single-phase input usually indicates a missing phase — verify the supply is on L1 and L2 (or L1 and L3, per the wiring diagram on the drive) and that the third terminal is left open, not bridged. CE (communication error) typically indicates a noise problem on the RS-485; ensure shielded twisted-pair cable is used and a 120 Ω terminator is fitted at the last node. The V1000 installation manual has a complete fault code reference.
Can I use the V1000 with a 220 V three-phase motor originally wired in star for 380 V?
Yes — rewire the motor from star to delta for 220 V operation. The V1000 200 V class output is 0–240 V phase-to-phase, which matches a delta-connected 220 V motor. Set the V/f pattern with E1-04 (Max Frequency) = 50 Hz, E1-06 (Base Voltage) = 220 V, and run the auto-tune routine. Do not exceed 50 Hz base unless the motor is nameplate-rated for 60 Hz or higher; the V1000 can be pushed to 80 Hz in field-weakening but at reduced torque.
