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Diy plans: converter for woodworking machines
1. Plans and tips to build a digitally controlled rotary single to three-phase converters between 4kW and 24kW (5hp to 30hp).
2. Plan and tips to build a non-digital rotary converter 4kW (5hp).
Phase converters are used in metalworking or woodworking workshops, in meat processing, in bakeries, on dairy farms, in print shops.
They run one or several three-phase machines on single phase power.
Non-digital converters are often used with simple machines in home workshops.
Digital converters are needed when phase voltages balance is wanted (CNC / PLC, plasma cutters, VSDs, welders, high motor output).
Digital rotary converters (plans included here under 1) offer advanced features but require a controller:
* Voltages remain symmetrical under all load conditions.
* CNC, PLC, VFD, welders, plasma cutters work fine.
* Motors will develop their full nameplate power.
* No contactors, no electrolytic capacitors are used.
* Expected operating life 80.000 hours.
* No EMC emission, no RFI, no harmonics are generated.
* Power quality and emissions meet all industry standards.
* Motors and machines accelerate and reverse fast.
* Specifications are as with Digi-Phase in the UK and Boosters in the US, Australia, New Zealand.
* No restrictions, all loads are permitted: Motors, electronics, heaters, transformers, rectifiers.
* Quiet operation with modern high efficient motors.
* Controllers are available in Australia, New Zealand, UK, USA.
Non-digital rotary converters (plans included here under 2) have some drawbacks but do not require a controller:
- The generated phase output voltage varies with changing loads.
- CNC / PLC, plasma cutters, VSDs, welders will most likely trip out due to voltage unbalance.
- Motors and machines cannot develop their full nameplate power.
- Contactors wear and fail after some years.
Digital non-rotary converters (see my other listings) can be lightweight but have some drawbacks too:
- Machines must be modified electrically before a VFD based system can be used (in 50Hz networks only).
- Electrolytic capacitors used have a limited lifetime (temperature dependent).
- Power factor is poor (if not very expensive).
- Harmonics found in input current are high (if not very expensive).
- RFI (Radio Frequency Interference) filtering is needed.
- EMI (Electromagnetic Interference) requires shielding of output cables.
Assemble the parts inside the box.
Let an electrician finish the wiring and connect the new converter to your machines.
A standard three-phase induction motor, 2 pole, high efficiency style. Soft motor mounts.
Standard motor-run capacitors.
If you go digital: Get a EuroTech digital controller (available in several countries).
Appliances wires, connector blocks, wire terminals.
If this is to be made for 50Hz: a single phase step-up autotransformer.
Parts, controllers, complete kits, support, complete solutions are available in the UK, the US, in Australia, in NZ.
Sources, parts and other details are published (google them) and are listed in the supplied documents.
Reading the wiring diagrams requires electrical knowledge.
1. Wiring diagrams covering nine different converters 4 8 12 16 24kW (5 10 15 22 30HP) based on controller types E, T and F.
Part specifications, building instructions, tips.
15 pages. No movies, no books, not the internal circuitry of the digital controllers.
2. One wiring diagram for a 4kW or 5hp single to three-phase converter using contactors instead of a controller.
3. Email and phone support for an electrician if needed.
Money back guarantee if you are not satisfied.
Supply voltage to your new Booster converter will be single phase 240V (220-240V).
Three-phase output will be (voltages are balanced if you choose T or F):
