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very first setup

(december 11, 2004)

• It's the very first setup.

Synopsis of first setup

• 1. RV prime mover works with single phase as described
• 2. RV alternator works in resonant modes as described
• 3. circulating power is much bigger than input power, even if the system is still untuned (PM needs 165 Volt, not 220 for correct impedance match).

Test Results

• blue motor as prime mover:
  • 380/660 V Delta/WHY, 5.5 kw, 2830 rpm, 50 Hz, wired for 660 V, from croatia (Koncar A03587)
• green motor as alternator:
  • 380 Volt Delta, 5.5 kw, 2780 u/min, 50 Hz, old GDR-motor from industrial washing machine.
• Caps are ac 450 V rated oil caps.

• Input :
  • 221 V, 3.16 A ac
• virtual Output:
  • 415 V, 10.72 A ac

System is untuned as yet. No power extraction yet.

Images of setup

alternator shows 415 V @ 10.72 amps

30 kw EM RV and first test run

(March, 14, 2006)

• Tests with 30Kw 3ph EM alternator in RV mode

Description of Setup

• info about 30Kw EM RV and first test run

Some values of the blue unit: - german "Finsterwalde"-Type 4-pol 3 ph EM excited alternator..still UNPAINTED ;) - 300 kg - 30 kw; 380 Volt - 4 exciter coils (stator) and 3 phase rotor - 4 slip.rings (3 phases + GND) - DC commutator for driving exciter coils with 75 volt

RV setup:

Unit is modified to run as EM-RV prime mover. Its the very first setup...nothing tuned yet.

- brushes from DC-commutator are removed

- DC coils are driven from extern by 220 volt battery assembly (34 x 6V batteries in series, from emergency power supply), in series with 1000 watt heating cartridge to limit excitation current

- connection:

- GND is floating

- cap size is 95µF (400 volt AC rated)

- unit is accelerated towards its synchron speed (1500 rpm) via 1.5 kw 3 ph asynchron acceleration motor(the green one in "EMRV2.jpg"), linked via V-belt

- 220 volt ac is connected as soon the unit reaches the rated rpms, and acceleration motor is switched OFF

- unit stays still in slip and trails the off-state acceleration motor at 1500 rpms in RV mode and remains stable

- more tests and numbers (and more color ;)) will follow...

Images of setup

30 kw unit with 5EU bank note as size reference

30 kw unit linked with 1.5 kw 3ph acceleration motor

coupled

Further images of 30Kw setup

self built 3 phase FWBR. Each diode is 30 amps 1200 V rated.

2 identical 30 kw EM alternators on top of a hydraulic driver system. Both are linked face to face. On axis are 2 friction gears (left side). A bit below is small but powerful hydraulic motor which normaly has a friction gear mounted as well to drive both units into its necessary RPMs. On left side below is 4.5 kw 3 phase motor that powers the hydraulic pump.

Close-up of hydraulic motor and friction gears. Hydraulic motor still without friction gear.

Close-up of the used big 5-pol cables for the 30 KW units to withstand the high amperage.

3 cap bundles for 3 phase resonant RV alternator test

Controller for RPM tuning of the unit (0 to 3200 RPM tested...more possible).

Inverter out of hospital...originally emergency power supply. DC power comes from about 40 x 6 V big power cells.

Setup today

Today this units are sitting on top of a hydraulic driver system that is able to turn both 300 kg RVed EM alternators far over 3000 RPMs, and speed is stepless tunable for resonance fine tuning. We got more than 50 kW in resonant 3 phase rotation even without exciter current.

We got more than 50 kW in resonant 3 phase rotation even without exciter current.

"First I tested whether such a big unit can run in RV prime mover mode. Next is, that we can create high Q 3 phase resonance in RV alternator mode with that mounsters. Hector stated that every PMed or EMed RV prime mover is OU already. Alternator is OU in any case."

See Also

• Directory:Rotoverter
• Directory:Rotoverter:Replications