Permanent Magnet DC Generators
Permanent Magnet DC Generators for Industrial & OEM Applications
High-efficiency 24V, 48V, 72V, and 96V DC generator solutions for industrial, mobile, and energy-focused applications — engineered for stable DC output, compact packaging, and low-maintenance long-term operation.
93%+
Peak Efficiency
80,000+ hrs
MTBF
~30%
Smaller & Lighter
24V – 96V
Standard Range
- Engineered to:
- CE Marking
- ISO 9001 Quality Management
- RoHS Compliance
High-Efficiency DC Power Generation
Reliable DC generator solutions for modern power systems
Innotec Power designs and manufactures permanent magnet DC generators for industrial, mobile, and energy-focused applications that demand stable performance, compact packaging, and high conversion efficiency.
Our DC generators are engineered for:
- Industrial equipment
- Battery charging systems
- Mobile machinery
- Renewable energy integration
- Off-grid power systems
- OEM applications
Available in multiple voltage and power configurations, our generators support demanding operating environments with stable performance and low maintenance requirements.
Specifications & Configurations
DC generator configurations engineered for OEM integration
For engineers and OEM buyers, selecting the correct generator configuration is critical for system efficiency, thermal stability, and long-term reliability. Our DC generators are available in multiple configurations based on:
- Voltage requirements
- RPM operating range
- Power output
- Mounting requirements
- Cooling methods
- Continuous-duty performance
- High power density
- Stable DC output
- Reduced maintenance
Key design advantages
High-efficiency PM design
Permanent magnet topology eliminates field excitation losses, sustaining 93%+ efficiency across the operating RPM range.
Compact & lightweight
Up to 30% smaller and lighter than traditional wound-field generators — ideal for mobile and space-constrained systems.
Low maintenance
Bearingless DC-PMG design eliminates brushes, slip rings, exciters, and diodes. MTBF exceeds 80,000 hours.
Product Catalog
Browse DC generators by voltage
Pick a voltage to see engine-mounted heads, PTO-driven generators, and complete ready-to-run DC generator sets.
24V DC Generators
Designed for compact mobile systems, battery charging applications, and lower-voltage industrial systems.
24V Engine Mounted Generators
Compact generator heads designed for direct engine integration in mobile and industrial applications. 5—10 kW.
24V PTO Generators
PTO-driven DC generators for agricultural equipment, utility systems, and mobile power applications.
Complete 24V DC Generator Sets
Integrated 5 kW / 14 kW DC genset packages for standalone power generation and battery charging systems.
48V DC Generators
Ideal for EV support systems, battery charging platforms, and industrial power applications that need balanced efficiency and performance.
48V Engine Mounted Generators
Compact 48V generator solutions for direct engine coupling and efficient mobile power generation. 3—18 kW.
48V PTO Generators
48V PTO-driven generator systems optimized for agricultural, industrial, and utility equipment applications.
Complete 48V DC Generator Sets
Complete 48V DC genset packages (14 kW & 25 kW) engineered for battery charging and continuous-duty applications.
72V DC Generators
Optimized for higher-efficiency systems and applications operating under increased power demands.
72V Engine Mounted Generators
72V engine-mounted generators designed for compact integration and improved high-efficiency performance. Custom-configured.
72V PTO Generators
72V PTO generator systems engineered for demanding industrial and mobile equipment applications.
Complete 72V DC Generator Sets
Integrated 72V DC generator systems for advanced charging and industrial power applications.
96V DC Generators
Designed for industrial and heavy-duty applications requiring higher operating voltages and improved efficiency.
96V Engine Mounted Generators
96V engine-driven generator systems for high- efficiency industrial integration. 5—40 kW.
96V PTO Generators
Heavy-duty PTO DC generators engineered for high-power industrial and off-highway applications.
Complete 96V DC Generator Sets
Complete 48V DC genset packages (14 kW & 25 kW) engineered for battery charging and continuous-duty applications.
Technical Reference
Understanding DC generator output characteristics
Our DC generator heads produce stable output voltage when operating at a constant RPM and electrical load. Changes in RPM or load directly affect output voltage behavior, so most real-world applications require an active regulation strategy.
RPM changes
Output voltage is approximately proportional to shaft speed.
- Increasing RPM → increases output voltage
- Decreasing RPM → decreases output voltage
Load changes
Electrical load conditions also shift the output voltage of an unregulated generator head.
- Increasing current draw → decreases voltage
- Decreasing current draw → increases voltage
Regulation Strategies
Regulating DC output: control architectures
Innotec Power supports multiple control architectures depending on application requirements, voltage stability targets, operating RPM range, and system integration constraints.
Option 1 — Engine speed control with closed-loop feedback
This approach creates a closed-loop system between engine speed and generator output voltage measured at the rectifier. The system continuously adjusts engine speed to maintain a stable DC output voltage.
How closed-loop regulation works
- Rectifier output voltage is continuously monitored
- Measured voltage is compared against a target setpoint
- If the voltage deviates, the engine speed is adjusted
- RPM is increased or decreased to return the voltage to the range
Advantages
- Stable output voltage
- Automatic compensation for load variation
- Simplified voltage regulation
- Improved system efficiency
- Reduced external control complexity
Typical applications
- Engine-driven generator systems
- Mobile equipment
- Battery charging systems
- Variable-load applications
Option 2 — Regulated output voltage using an external controller
When engine speed control is not practical or available, output voltage can be regulated by a dedicated controller. The controller continuously monitors and regulates generator output independently of engine speed.
Controller Topologies
Innotec Power uses several controller topologies depending on voltage range, current requirements, RPM operating range, and application demands.
Advantages
- Independent voltage regulation
- Flexible system integration
- Improved control flexibility
- Suitable for fixed-speed systems
- Supports broader operating conditions
Typical applications
- Fixed RPM systems
- Electrified platforms
- Advanced charging systems
- Systems requiring tighter voltage control
Choosing the right control architecture
The ideal regulation method depends on engine control capability, load variability, voltage stability requirements, operating RPM conditions, and system complexity targets. Closed-loop speed control is often preferred for simpler integrated systems, while external controllers provide greater flexibility and precision for more advanced power architectures.
Why PM Wins
Permanent magnet DC generators vs traditional designs
| Feature | Permanent Magnet DC Generator | Wound Field Generator |
|---|---|---|
| Efficiency | Higher (93%+) | Moderate |
| Maintenance | Lower | Higher |
| System complexity | Lower | Higher |
| External excitation | Not required | Required |
| Size & weight | Compact (~30% smaller) | Larger |
| Reliability | High (MTBF > 80,000 hrs) | Moderate |
Why OEMs choose permanent magnet generators
PM generator designs eliminate field excitation losses and reduce system complexity, making them ideal for compact systems, energy-efficient applications, mobile equipment, and industrial power systems. They also provide improved efficiency, reduced maintenance, and simplified integration.
Engineering Considerations
Factors that affect DC generator performance
Generator performance depends on multiple engineering factors beyond power output alone.
RPM stability
Fluctuating RPM directly impacts output voltage, efficiency, and thermal behavior. Variable-speed applications may require optimized winding and controller strategies.
Thermal management
Continuous-duty systems require efficient cooling to maintain stable output, long service life, and consistent efficiency. Cooling strategy strongly affects reliability.
Load characteristics
Continuous load demand, startup current, transient load behavior, and charging characteristics all influence generator sizing and configuration.
Applications
Permanent magnet DC generator applications
Industrial equipment
Compact power generation, stable DC output, and reliable continuous operation for industrial systems.
Battery charging systems
Battery charging platforms, mobile charging systems, and off-grid power solutions where efficiency and stable output are critical.
Mobile & off-highway equipment
Utility vehicles, construction equipment, agricultural systems, and mobile machinery requiring compact, high-efficiency power.
Renewable energy systems
Renewable and hybrid power systems where efficiency, reliability, and compact design are essential.
OEM Engineering Support
Custom DC generator solutions
We support OEM and application-specific generator configurations, including:
- Custom voltage outputs
- Winding optimization
- Mounting adaptations
- Thermal design modifications
- Controller integration support
Our engineering team works directly with customers to develop generator solutions optimized for specific operating requirements.
Why Innotec Power
Engineered DC generator solutions built for industrial reliability
PM generator expertise
Decades of focused experience designing permanent magnet alternators and DC generator heads.
OEM-focused support
We work directly with engineering teams to integrate generators into specific platforms.
High-efficiency designs
93%+ efficiency reduces fuel use, heat, and total cost of ownership.
Compact & lightweight
Up to 30% smaller than comparable wound-field units.
Custom configuration
Voltage, winding, mounting, and controller integration to fit your application.
Long-term reliability
MTBF > 80,000 hours with no brushes, slip rings, or wear components.
FAQ
Frequently asked questions about DC generators
A permanent magnet DC generator uses permanent magnets instead of wound field excitation to generate electrical power, improving efficiency and reducing
system complexity.
Yes. Permanent magnet generator designs eliminate excitation losses and typically deliver higher overall efficiency — Innotec PM generators sustain peak efficiency above 93% across a wide RPM range.
Required RPM depends on generator design, voltage target, and application. Innotec standard DC generator heads typically operate in the 2,200–2,700 RPM range, but custom configurations are available for higher or lower-speed prime movers.
Yes. DC generators are commonly used in battery charging systems and off-grid power applications because their direct DC output avoids the conversion losses associated with AC generators feeding rectifier/charger stages.
Common industries include industrial automation, mobile equipment, renewable energy, agriculture, utility systems, and battery charging applications.
Standard Innotec PM DC generators are available in 24V, 48V, 72V, and 96V configurations, with higher-voltage 240V, 300V, and 400V options also available. Custom voltage outputs can be developed for OEM applications.