In modern power generation, stability, reliability, and efficiency are not just desired features—they are essential requirements. Innotec Power’s Permanent Magnet Generator (PMG) exciter systems are designed to meet these demands, offering unmatched performance in applications where consistent excitation power and voltage stability are crucial. From industrial standby units to marine auxiliary power systems, our PMG exciters ensure your generator delivers dependable power, even in the toughest operating environments.
What makes a PMG exciter system different is its ability to supply independent, constant excitation power to the generator’s field windings. This means your system is not affected by voltage fluctuations from the main alternator output, allowing it to respond instantly to sudden load changes or heavy inrush currents. This reliability makes PMG exciters ideal for industries where downtime or unstable power is simply not an option.
Superior Excitation for Demanding Loads
A PMG exciter system ensures that the generator’s field windings receive a stable source of excitation power at all times. This stability is especially important when the generator is supplying variable or non-linear loads. In many applications, electrical systems must react quickly to challenging conditions, such as:
High inrush currents – Occur during large motor starts or pump activation.
Sudden load changes – Seen when switching between power sources.
Non-linear loads – Includes equipment like variable frequency drives, welders, and UPS systems.
By delivering consistent excitation power, a PMG improves the generator’s ability to handle these situations without voltage dips or instability. In turn, this reduces the risk of stalling motors, tripping breakers, or damaging sensitive equipment. Additionally, PMG systems enhance fault discrimination, which helps protect the generator and the entire electrical system during short-circuits or overload events.
Brushless Exciter Design for Long-Term Reliability
One of the main advantages of Innotec Power’s PMG excitation systems is their brushless design. Unlike conventional excitation methods that rely on carbon brushes, our PMG alternators operate without physical contact points that wear out over time. This means:
Extended service life – Fewer replacements over time.
Reduced maintenance requirements – No brushes to inspect or replace.
Reliable first-load response – Consistent performance immediately after startup.
The PMG alternator in our system acts as a brushless exciter, producing clean, regulated excitation voltage through a solid-state, three-phase full-wave bridge rectifier. This design not only delivers smooth and efficient excitation power but also minimizes downtime caused by maintenance or unexpected part failures.
Integrated Over-Excitation Protection
Safety is built into every Innotec Power PMG exciter system. Over-excitation can damage the generator’s components, overheat windings, and compromise connected loads. To prevent this, our PMG systems include integrated over-excitation protection.
This intelligent feature continuously monitors the excitation voltage and, if it exceeds preset limits, initiates a controlled shutdown of the regulator within seconds. This rapid response ensures that the generator and all downstream equipment are protected from harm.
Practical Example – PMG Exciter in a Marine Backup Generator
Consider a 400 kW marine backup generator installed on an offshore vessel. This generator is responsible for starting large seawater pumps and air compressors in emergency situations. Without a PMG exciter, the generator’s voltage could drop sharply when these motors start, potentially causing them to stall and putting safety systems at risk.
With an Innotec Power PMG exciter in place:
Dedicated excitation power – Provided independently from the main generator output.
Stable performance under heavy load – Even when faced with high inrush current.
Built-in protection – Integrated over-excitation safeguards against extreme conditions.
The result is immediate load response, continuous power supply, and protection for critical ship systems. This same benefit applies to other environments, such as mining operations, industrial plants, and standby power systems where sudden heavy loads are common.
Advantages of Innotec Power PMG Exciter Systems
Higher starting power – Ideal for large motors, pumps, and compressors.
Voltage stability – Consistent generator output under varying loads.
Brushless reliability – Reduced maintenance and long service life.
Enhanced protection – Over-excitation monitoring and quick shutdown.
Custom configurations – Voltage and output options to fit your needs.
Applications of PMG Exciter Systems
Industrial standby generators – For critical power backup.
Marine auxiliary systems – Stable power for vessel operations.
Construction and mining power units – Rugged reliability in harsh conditions.
Renewable energy hybrids – Stable performance in integrated systems.
Emergency response power – Quick and reliable backup in disaster situations.
Why Choose Innotec Power for Your PMG Exciter System?
At Innotec Power, we combine engineering expertise with real-world application knowledge. Our PMG exciter systems are designed not just to meet specifications but to excel in practical operation. Every unit is tested for performance, durability, and safety before delivery.
We understand that each project has unique requirements. That is why we offer customizable voltage outputs, power ratings, and design configurations to match your generator system perfectly. Our support team works closely with customers to provide technical guidance, installation support, and after-sales service, ensuring that every PMG system delivers long-term value.
Delivering Performance and Reliability Where It Matters Most
In demanding environments, the smallest electrical instability can cause big problems. Innotec Power’s Permanent Magnet Generator exciter systems are built to prevent such issues, ensuring that your power generation system operates smoothly and reliably. From instant motor starts to stable voltage under fluctuating loads, our PMG exciters keep your operations running without interruption.