Product Overview

The Lenze EMB9342-E stands as a high-efficiency regenerative power supply unit within the renowned 9300 series ecosystem. Industrial facilities often waste significant amounts of energy during motor braking cycles, dissipating it as heat through braking resistors. The EMB9342-E eliminates this waste by capturing kinetic energy from the motor and feeding it back into the AC supply grid. This process not only reduces total energy consumption but also minimizes heat buildup within control cabinets.

Lenze engineered the EMB9342-E to handle the demanding requirements of high-inertia loads and rapid deceleration cycles. With a mass of 7.5 kg, this unit combines a robust mechanical build with sophisticated power electronics. It integrates seamlessly with Lenze frequency inverters, creating a unified and sustainable motion control solution. By choosing the EMB9342-E, operators invest in a device that lowers operational costs while enhancing the environmental profile of their machinery.

Advanced Energy Management and Performance

The EMB9342-E delivers a substantial continuous DC power output of 14.4 kW. During periods of intense mechanical stress or rapid stopping, the unit manages peak power outputs of up to 21.6 kW. This high peak capability ensures that the system maintains stability during sudden load changes or emergency braking sequences.

The unit supports a broad input voltage range, spanning from 320 V to 528 V. This flexibility allows the EMB9342-E to operate reliably across global industrial power grids. Furthermore, it functions within a frequency range of 48 Hz to 62 Hz, accommodating both 50 Hz and 60 Hz standards. The nominal input current rating of 24 A and a maximum current limit of 36 A provide the necessary headroom for high-performance industrial tasks.

Technical Specifications

The following parameters define the operational boundaries of the Lenze EMB9342-E:

• Manufacturer: Lenze
• Part Number: EMB9342-E
• Series: 9300 Series
• Continuous Power Output (DC): 14.4 kW
• Peak Power Output (DC): 21.6 kW (Brief duration)
• Input Voltage Range: 320 V to 528 V AC
• Frequency Range: 48 Hz to 62 Hz
• Continuous DC Bus Current: 26 A
• Peak DC Bus Current: 39 A
• Nominal Input Current: 24 A
• Maximum Input Current: 36 A
• Apparent Power (AC Side): 16.6 kVA
• Total Motor Power (Motor Mode): 12.0 kW
• Total Generator Power: 17.0 kW
• Power Dissipation: 200 W
• Weight: 7.5 kg

Thermal Management and Reliability

Efficient thermal management remains a core feature of the EMB9342-E. Lenze engineered the unit to dissipate 200 W of internal heat, ensuring that components remain within their safe operating temperature ranges. The unit performs optimally up to an ambient temperature of 40°C. For environments that exceed this threshold, the EMB9342-E employs a thermal derating factor of 2% per degree Celsius. This predictable performance drop allows system designers to size their cooling systems accurately for extreme industrial conditions.

The unit’s ability to manage 17.0 kW of total generator power makes it particularly suitable for applications with frequent braking cycles. Instead of relying on expensive and bulky external braking resistors, the EMB9342-E manages energy internally and returns it to the source, significantly simplifying the overall system architecture.

Common Applications

The Lenze EMB9342-E excels in several key industrial sectors:

1. Cranes and Hoists: Recovers energy during the lowering of heavy loads, significantly reducing electricity costs in port and warehouse operations.
2. Centrifuges and Separators: Manages the high kinetic energy of rotating masses during deceleration cycles.
3. Elevator Systems: Provides a regenerative solution for multi-floor transport, feeding energy back to the building grid during descent.
4. Winding and Unwinding Machinery: Maintains tension while recovering energy from the unwinding process in paper, textile, and metal processing.
5. Automated Storage and Retrieval Systems (ASRS): Enhances the energy efficiency of high-speed shuttles and vertical lifts.

Frequently Asked Questions

How does the EMB9342-E save money?
The unit captures energy that standard drives normally waste as heat through braking resistors. By feeding this energy back into your facility’s electrical grid, you directly reduce your total power consumption and lower your utility bills.

Does this unit replace the need for braking resistors?
In many applications, yes. The EMB9342-E handles the energy recovery process internally. However, some safety-critical systems still include a small braking resistor as a backup for emergency stops during power outages.

What happens if the ambient temperature exceeds 40°C?
The unit continues to operate but with reduced capacity. For every degree above 40°C, you must reduce the output power by 2%. For example, at 50°C, the unit provides 80% of its rated power.

Is this unit compatible with other brands of inverters?
Lenze designed the EMB9342-E primarily for the 9300 series ecosystem. While it connects to standard DC bus systems, you should consult the technical manual to ensure compatibility with third-party drive components.