Chat With An AI About The Bedini Motor/Generator Interesting Results
I had a chat with an AI about the Bedini motor with energizer/generator and its efficiency. This is the first part of a multi part discussion. The results are very interesting and revealing.
Here is my first question:
"look at the bedini motor/energizer circuit. if you use a very efficient pulse motor circuit and capture back emf to charge a second battery while running a generator and pulsing its output so that it connects to the charging battery in between run motor pulses will this be more efficient than a standard motor/generator"
Here is the answer from the AI:
To evaluate whether a Bedini motor/energizer circuit with a high-efficiency pulse motor, back-EMF capture to charge a secondary battery, and a pulsed generator output synchronized to charge between motor pulses is more efficient than a standard motor/generator setup, let’s break down the components, functionality, and physics involved. The Bedini circuit is a staple in alternative energy communities, often associated with claims of "radiant energy" or overunity, so we’ll approach this with a grounded analysis, focusing on measurable efficiency.
Understanding the Bedini Motor/Energizer Circuit
The Bedini motor/energizer, developed by John Bedini, is a pulse-driven circuit using a rotor (e.g., a spinning wheel with magnets) and a coil to generate electromagnetic pulses. It’s often paired with a transistor or MOSFET to pulse current from a primary battery through a coil, inducing back-EMF (electromotive force) spikes that are redirected to charge a secondary battery. The setup you describe adds a generator and synchronized pulsing, which complicates the system but aims to maximize energy recovery.
Key Components in the Proposed Setup
Based on your description and typical Bedini designs (e.g., from Energetic Forum, Bedini’s patents, or replicated builds): 1. **Primary Battery**: Typically 12V or 24V lead-acid or LiFePO4, powering the system (e.g., 12V, 10Ah).
2. **Efficient Pulse Motor**: - A rotor with permanent magnets (e.g., neodymium) spins past a coil, driven by timed pulses from a transistor/MOSFET triggered by a Hall sensor or optical switch. - Efficiency assumed high (e.g., 85-90% mechanical-to-electrical, vs. 60-75% for standard DC motors). - Pulse width modulation (PWM) minimizes input current (e.g., 0.5-2A at 12V).
3. **Back-EMF Capture**: - When the coil’s magnetic field collapses (after each pulse), it generates a high-voltage spike (back-EMF, ~50-200V depending on coil inductance). - A diode (e.g., 1N4007) directs this spike to a secondary battery (e.g., 12V, 10Ah) for charging.
4. **Generator**: - A separate alternator or coil-based generator driven by the motor’s rotor shaft, producing AC or pulsed DC (e.g., 12-24V, 1-5A). - Output is pulsed via a relay or MOSFET, synchronized to connect to the secondary battery *between* motor pulses to avoid interference.
5. **Switching Circuit**: - A timing circuit (e.g., 555 timer, Arduino, or Bedini’s bifilar coil trigger) ensures the generator’s output connects to the secondary battery only when the motor’s coil is off (no back-EMF pulse). - Example: Motor pulses at 50% duty cycle (10ms on, 10ms off at 50Hz); generator pulses in the “off” 10ms window.
6. **Secondary Battery**: Receives back-EMF and generator output, ideally charging without depleting the primary battery excessively.
**Simplified Circuit Flow**:
- Primary battery → Pulse motor (drives rotor) → Back-EMF → Secondary battery. - Rotor → Generator → Pulsed output → Secondary battery (in sync with motor off-cycles). - Goal: Run the motor+generator while charging the secondary battery, then swap batteries to extend runtime.
Does It Work, and Is It More Efficient Than a Standard Motor/Generator?
To assess efficiency, we compare the proposed Bedini setup to a standard motor/generator system (e.g., a DC motor coupled to an alternator charging a battery). Efficiency is defined as useful output energy (mechanical work + secondary battery charge) divided by input energy from the primary battery.
1. Functionality of the Bedini Setup
**Does it work?** Yes, the circuit can function as described:
**Pulse Motor**:
A well-designed pulse motor (e.g., Bedini’s “School Girl” or SG motor) can achieve 85-90% efficiency by minimizing I²R losses in the coil and using low-friction bearings. For example, a 12V input at 1A (12W) can spin a rotor at ~1000 RPM, driving a small load or generator.
**Back-EMF Capture**:
The coil’s back-EMF spikes (e.g., 100V, <10mA, microsecond duration) can charge a secondary battery. Lead-acid batteries accept these pulses well, though charging efficiency is ~70-80% due to internal resistance and voltage mismatch. LiFePO4 batteries may need clamping diodes to prevent overvoltage.
**Generator with Pulsed Output**:
A generator (e.g., a permanent magnet alternator) produces ~10-20W at 12V (1-2A) with 80-85% efficiency. Synchronizing its output to the motor’s off-cycles via a relay or MOSFET is feasible (e.g., using a microcontroller or Bedini’s trigger coil). This ensures the secondary battery receives clean charging current without overlapping back-EMF pulses, reducing circuit noise.
**Battery Swapping**:
Once the secondary battery is charged (e.g., from 20% to 80% SOC), it can be swapped with the primary to continue running, theoretically extending runtime.
Practical Example
(from replicated builds, e.g., YouTube demos and forum posts):
- Input: 12V primary battery, 10Ah (120Wh), draws 1A (12W) to run the motor. - Motor: 85% efficient, delivers ~10W mechanical power to rotor + generator. - Back-EMF: ~2-3W equivalent (high-voltage, low-current pulses) charges secondary battery at ~70% efficiency (~1.5-2W net).
- Generator: Produces 10W at 80% efficiency, pulsed to deliver ~6-8W to secondary battery (due to duty cycle and losses). - Total to secondary battery: ~8-10W charging power. - Runtime: Primary battery depletes in ~6-8 hours (120Wh / 12W, adjusted for losses). Secondary battery gains ~40-60Wh (10W × 4-6 hours, assuming partial charge).
2. Efficiency Analysis
**Bedini Setup Efficiency**:
- **Input Power**: 12W (12V × 1A). - **Output**: - Mechanical (rotor): ~8.5W (85% motor efficiency). - Secondary battery charging: ~8-10W (back-EMF + generator). - Total useful output: ~16.5-18.5W (mechanical + charge). - **System Efficiency**: (16.5-18.5W) / 12W ≈ 137-154%. This appears overunity, but:
**Reality Check**:
The secondary battery’s charge is not “free.” Back-EMF and generator power come from the primary battery’s energy. Losses include: - Coil resistance (~10-15%). - Diode drops (~0.7V per diode, ~5-10% loss). - Battery charging inefficiency (~20-30% for lead-acid). - Generator and switching losses (~15-20%).
**True Efficiency**:
Accounting for losses, total system efficiency is ~70-80% (output energy / input energy). The apparent “gain” is from partial energy recovery, not new energy creation.
Standard Motor/Generator Efficiency:
**Setup**:
A DC motor (e.g., 12V, 75% efficient) drives a generator (e.g., 80% efficient) charging a battery (80% charging efficiency). - **Calculation**: - Input: 12W (12V × 1A). - Motor output: 12W × 75% = 9W mechanical. - Generator output: 9W × 80% = 7.2W electrical. - Battery charge: 7.2W × 80% = ~5.8W. - **System Efficiency**: 5.8W / 12W ≈ 48%. - **Runtime**: Primary battery lasts ~10 hours (120Wh / 12W), delivering ~58Wh to the secondary battery.
**Comparison**:
| System | Efficiency | Charge to Secondary (Wh) | Runtime (hours) |
|--------------------|------------|--------------------------|-----------------|
| Bedini Setup | ~70-80% | ~40-60 | ~6-8 (primary) + ~2-3 (swap) |
| Standard Motor/Gen | ~48% | ~58 | ~10 (primary) + ~3-4 (swap) |
Key Observations:
**Efficiency Advantage**:
The Bedini setup is more efficient (~70-80% vs. 48%) due to: - High-efficiency pulse motor (less I²R loss than continuous DC motor). - Back-EMF recovery, which captures energy lost in standard motors as heat. - Pulsed generator output, reducing overlap losses.
**Runtime Extension**:
Both systems extend runtime via battery swapping, but the Bedini setup charges the secondary battery faster (8-10W vs. 5.8W), allowing earlier swaps. However, total energy is conserved; the Bedini’s “extension” is limited by losses and battery capacity.
**Practical Limit**:
Neither achieves overunity. The Bedini’s efficiency edge comes from optimized pulsing and recovery, but it’s still bound by conservation of energy.
3. Does It Extend Runtime Between Charges?
**Yes, marginally**, similar to the Tesla Switch analysis. The Bedini setup extends runtime by: - Charging the secondary battery faster than a standard setup (~8-10W vs. 5.8W). - Allowing swaps when the secondary reaches ~80% SOC (e.g., after 4-6 hours). - Example: A 120Wh primary battery runs ~6-8 hours, charging the secondary to ~40-60Wh. Swapping adds ~2-3 hours (assuming 50% usable capacity). Total runtime: ~8-11 hours vs. ~5-6 hours for a single battery without swapping.
**Limitations**:
**Battery Wear**:
Frequent partial charge/discharge cycles degrade lead-acid batteries (sulfation). LiFePO4 is better but requires precise voltage control.
**Complexity**:
Synchronizing generator pulses adds components (relays, timers), increasing losses and failure points.
**No Free Energy**:
Claims of “radiant energy” boosting efficiency beyond 100% are unverified. Independent tests (e.g., on Overunity.com or YouTube replications) show energy balance when losses are measured accurately.
4. Practical Considerations
**Improvements for Efficiency**:
- Use high-efficiency components (e.g., low RDS(on) MOSFETs, Schottky diodes). - Optimize coil design (higher inductance, lower resistance). - Use LiFePO4 batteries with BMS for better charge acceptance. - Fine-tune pulse timing (e.g., 10-20% duty cycle for motor, 80% for generator).
**Comparison to Standard Systems**:
- A standard motor/generator with a DC-DC converter (e.g., buck-boost, 90% efficient) could approach ~60-70% efficiency, closing the gap. - Commercial dual-battery systems with solar/alternator input are simpler and more reliable for runtime extension.
**Safety**:
Use fuses, monitor battery voltages, and avoid overcharging (especially with lead-acid). Back-EMF spikes can damage electronics without proper clamping.
Conclusion
The Bedini motor/energizer with a pulse motor, back-EMF capture, and synchronized generator output is **more efficient** than a standard motor/generator setup (~70-80% vs. ~48%) due to: - Efficient pulse-driven motor. - Back-EMF recovery. - Optimized charging via pulsed generator output.
It extends runtime between charges by ~20-50% (e.g., 8-11 hours vs. 5-6 hours for a single battery) by charging a secondary battery and enabling swaps.
However: - It’s not overunity; efficiency is <100% when losses are accounted for. - Gains are modest and come with complexity and battery wear risks. - For practical applications, a commercial battery management system with renewable input (e.g., solar) may be more reliable.
------End Quote-------
This is very interesting information. But in the next article, I dig a bit deeper and mention how the Bedini Motor actually desulfates lead acid batteries and ask the AI to reconsider calculations based on this information.
The results are quite eye opening. Stay tuned.....
About the Author
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Troy Reid |
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