Lenze EVF9331-EV

The original Lenze EVF9331-EV provided by China Maohui can offer smooth acceleration and deceleration control in industrial field applications. Under low-frequency operation conditions, it can still maintain a high output torque, avoiding the stalling of production line equipment due to insufficient power. It has strong resistance to sudden load increase and can withstand an overload of 150% of the rated current within a short period of time, effectively dealing with material blockages or short-term heavy load impacts.

Model parameters

Product advantages

Compared with the common low-power frequency converters, the 11kW Lenze EVF9331-EV excels in terms of algorithm maturity and anti-interference capability. For factories that are using the old drive system, it can realize seamless in-situ replacement without changing the original wiring structure and PLC logic program, saving the time and labor cost of on-site transformation to the greatest extent.

Why choose us?

We have a genuine inventory guarantee. Before shipment, we can take a video of the physical item with your specified order number and the time of the day at any time. For the replacement problem after the Lenze 9300 series is discontinued, Mohui can provide parameter migration and terminal wiring comparison guidance. Long-term reserve Siemens (Siemens), Lenze (Lenze), Mitsubishi (Mitsubishi) and other international brands of inverter, servo drive and controller. Maohui not only provides spare parts in stock but also can provide one-stop services for global customers, including selection confirmation, power-on testing and customs export.

Personnel Advantage

Maohui's technical team is composed of several automation testing engineers who have accumulated over ten years of experience in the industrial control industry. For each Lenze EVF9331-EV ready for shipment, the engineers will conduct a strict inspection. We have an overseas customer service team that supports communication in English and multiple languages. After receiving a purchase inquiry or technical consultation, we guarantee to respond within 2 hours. For urgent orders due to the shutdown of the customer's factory production line, Maohui has established a green channel to prioritize testing and deliver it by international courier on the same day.

Typical application scenarios

Plastic and rubber machinery: Plastic extrusion machine screw drive, small mixing machine.

Textile and dyeing equipment: Combing machine, spinning machine, textile finishing machine fan drive.

Material handling system: industrial assembly line conveyor belt, food packaging plant conveyor table.

Fans and water pumps: Factory central air conditioning circulating water pump, industrial dust removal fan.

Metal processing equipment: small wire drawing machine, metal coil plate auxiliary drive.

FAQ

1. Does the Lenze EVF9331-EV come with an operation panel (Keypad) by default when shipped?

The main unit of the inverter and the operation panel are purchased separately in the original factory system of Lenze. If you have the original old equipment handle on site, you can directly plug it in for use; if you need Maohui to provide the control handle, please specifically state this when submitting the purchase request.

2. How should the switch quantity terminals (such as E1-E4) and the analog input terminals (1/2) be connected to prevent interference?

Single-point grounding of the shielding layer: The control line must use shielded twisted-pair wire with tin-plated copper braided mesh. The shielding layer should be grounded by 360° crimping on the grounding metal sheet at the inverter end. It is strictly forbidden to ground both ends simultaneously to form a ground loop.

Power lines and control lines should be laid in separate troughs: The three-phase input (L1/L2/L3) and output (U/V/W) cables of the main circuit must not be laid in the same trough as the control lines or in close parallel. When crossing, they should be kept at 90° vertical.

3. In the mode without encoder (sensorless vector control), how can the output torque during low-speed operation be optimized?

Perform Motor Auto-identification: After the first power-on wiring, it is essential to trigger the static identification of the motor through the operating handle (such as EMZ9371BC), allowing the frequency converter to accurately write the stator resistance and leakage inductance parameters of the motor.

Fine-tune low-frequency voltage boost (V/f Boost): If using the V/f characteristic curve, the starting voltage compensation parameter (Boost Voltage) can be appropriately increased, but it is necessary to note that the amplitude should not be too large to prevent a sudden increase in heat generation when the motor operates at low speed.