Frequency inverters for three-phase motor

Manufacturer Nietz is a high-tech manufacturer and supplier of industrial automation products, founded in 2010. Nietz specialises in technological research, production and sales of high-end intelligent equipment and its main components. The main products of Nietz are frequency converters, servo systems, speed control systems, and complete equipment. Nietz's products stand out for their technological advantage and wide range at a low price, and are used in various industries such as textile industry, compressors, lifts, packaging machines, electronic equipment and others. Nietz is a leader in the industry, having gained a good reputation and deep influence. Nietz's products are exported to more than 20 countries and regions such as Europe, South America, Southeast Asia, the Middle East, etc. Nietz always aims to be a professional supplier of drive solutions and your mutually beneficial partner in the field of speed and motion control at a competitive price.

On this page, you can find frequency inverters:

SPLC-ESD Economical scalar frequency inverters SPLC-ESD are intended for use in efficient control of fans, pumps, belt conveyors, and other devices that use three-phase asynchronous motors with a voltage of 220. To supply power to the scalar frequency converters, SPLC-ESD must be connected to a single-phase network 220 V. It should be noted that these frequency inverters are not equipped with an RS-485 interface. This inverter is suitable for simple, lightly loaded motors, common applications include frequency regulation of fans, pumps, etc.

This model can be applied for manual control of the motor using a potentiometer, set the speed task from the keyboard or receive remote analog or discrete signals. It also allows the regulation of the motor speed using analogue feedback in the range from 0 to 5 V and has the function of setting 7 different speeds in multi-speed mode.

SPLC-ESD2 Economical scalar frequency inverters from the SPLC-ESD2 line are designed for effective device management, such as fans, pumps, and belt conveyors, operating on three-phase asynchronous motors with a voltage of 220 V. To supply power to the frequency inverter, SPLC-ESD2 must be connected to a single-phase network 220 V. We support the availability of different powers, you can buy an inverter for any electric motor.

Compared to the similar series NIETZ SPLC-ESD, purchasing this scalar frequency inverter is more advantageous for the following reasons:

1. The presence of an RS-485 interface allows interaction with other devices, changing the speed and direction of the motor's rotation via a PLC, as well as the remote start of the motor operation.

2. A narrow range of output frequencies, making it ideal for specific applications.

3. Higher nominal input and output current, increasing its application with high-load electrical equipment.

This inverter supports Modbus RS-485 protocol with data transfer speed up to 9600 bps. It also provides the ability to control the motor manually using a potentiometric knob, set values from the keyboard, receive remote analogue or discrete signals, and provide PID regulation of motor speed using analog feedback in the range from 0 to 5 V. Additionally, it has the function of setting 7 different speeds in multi-speed mode.

SPLC-NLP Compact and multifunctional scalar frequency inverters are designed for connection to a 220 V and 380 V network depending on the model and controlled by three-phase asynchronous motors. The main advantages of these frequency inverters are the wide range of management options for various equipment, including pumps, conveyor belts, and various types of machines, thanks to flexible start and stop settings of the motor, as well as adaptation of the V/f characteristic for different types of loads. The converter also supports PID regulation functions, remote frequency regulators, and programmed multi-step PLC instruction according to the principle of world brands and additional functions, which makes its application with your systems convenient. The converter can control the frequency of the electric motor up to 400 Hz, but the permissible currents of the electric motor need to be checked.

SPLC-AT20 Three-phase series frequency inverters SPLC-AT20 operate with three-phase voltage 380 V and single-phase 220 V, intended for use with three-phase asynchronous motors. The frequency inverter of this series changes the frequency up to 600 Hz. The frequency inverter model SPLC-AT20 offers two operating modes for the industry:

1. Precise open-loop vector control, which does not require sensors for motor control, ensuring high accuracy in torque control.

2. Simple to set scalar control, based on voltage and frequency regulation. Although less accurate, this mode allows the control of more powerful motors and is easier to set up.

A control panel with an LCD screen, indicators, and customizable keys is detachable. By standard, the removable operator panel is mounted on the device, but for remote connection capability an additional order of the appropriate connector is needed (the cost of the frequency inverter does not include this option).

SPLC-NZ2200 Frequency inverter from SPLC-NZ2200 series, designed to regulate the speed of three-phase asynchronous motors, operates at a voltage from 220 V for three-phase asynchronous motors, operates at a voltage from 220 V, converting it to the necessary output 380 V to power the motor. This inverter is distinguished by the presence of a built-in block to increase the output voltage, allowing it to be connected to a conventional single-phase network 220 V and used for controlling three-phase motors 380 V with star connection, which is important for keeping the rated torque on the motor shaft. This is one of the best single-phase inverter series for three-phase motors. This frequency inverter can generate a frequency for the electric motor up to 800 Hz. We support the availability of different power capacities, and you can buy an inverter for any electric motor.

This model has an IP20 protection degree, so it is recommended to install it on a DIN rail in specialized cabinets to ensure protection from dust and moisture.

If necessary, the panel can be removed and relocated to the front of the cabinet. The cost of the cable and mounting elements is not included in the basic configuration and is provided upon request.

SPLC-NZ8000 - High-performance vector frequency inverters from the SPLC-NZ8000 series are designed for effective control of three-phase electric motors with a voltage 380 V, especially in conditions of possible overloads, with elevated control quality requirements. These frequency inverters are equipped with a more powerful microprocessor compared to the SPLC-AT20 series, providing faster operations. This, in turn, allows SPLC-NZ8000 to implement precise sensorless vector speed control with an error of merely ±0.5%. If necessary, the inverter can switch to simple scalar control mode U/f with no greater accuracy, and also switch to "Pump" mode to connect more powerful motors with low load. The inverter can control the operation of an electric motor requiring high accuracy operation. The main application is highly loaded machine parts, where high reliability is required.

Additionally to the frequency inverter SPLC-NZ8000, a PG board can be installed, available for purchase separately. When using this board, you can connect an encoder sensor to the inverter, allowing tracking of the motor's rotational speed and rotor position. The feedback vector control ensures high response speed and accuracy in frequency regulation down to ±0.02%. It also allows torque control with an accuracy of ±5% and work with not only asynchronous but also synchronous motors.

When choosing a frequency inverter for controlling a three-phase asynchronous motor, consider the following important aspects:

1. Power and load: You need to determine the required power of the frequency inverter based on your motor's power and load characteristics. In addition, it is important to note that motor current often exceeds the rated current of the frequency inverter, so you should choose an inverter with a higher rating for safety and efficiency. Verify motor currents on the motor's plate.

2. Input and output voltage: Make sure the frequency inverter is compatible with your electric network and three-phase motor voltage. If you want to buy a frequency inverter, also check motor currents usually indicated on the nameplate, we support various power capacities.

3. Control type: Decide which control type suits your needs, remember that the price of the inverter influences its functionality. Options include vector control and scalar control. Vector control provides more precise and dynamic control over the motor, while scalar control is simpler and may be better in some situations. Also, decide if there is a need for frequency inverter encoder connection capability. The frequency inverter can be used as a soft starter device.

4. Load specifications: Evaluate the characteristics of your load, including inertia, start and stop frequency, as well as speed and accuracy requirements. Additionally, specify the conditions in which the frequency inverter will operate, as this will determine dust and moisture protection requirements.

5. Compatibility and additional features: Consider if you need compatibility with other systems, such as programmable logic controllers (PLCs), as well as what additional features are necessary, such as interfaces for remote changes, support for various communication protocols and programming capability to configure the frequency inverter for specific process needs. Our inverters support group mounting, that is, one can be designated as "master" and will control the operation of others.

Following these recommendations will help you choose the most appropriate frequency inverter, providing efficient and safe control over your three-phase asynchronous motor. At our warehouse, power converters capacities up to 55 kW are supported, with one of the largest ranges in Ukraine.

Buying a frequency inverter from us is a reliable solution for your electric motor control needs. Our company offers several advantages that make us the optimal choice:

1. Expert knowledge: We have extensive experience and expertise in the field of frequency inverters. Our experts are ready to help you choose the best option that meets your needs.

2. Quality and reliability of inverters: our online store offers high-quality frequency inverters that have undergone rigorous testing and certification. You can be confident in their reliability and durability. Our device requires installation in a cabinet for longevity, to prevent malfunction in dusty conditions. Frequency inverter series NZS is dust and moisture-resistant, which is advantageous over other series.

3. Individual approach: We work on developing solutions taking into account the specific characteristics of your project. We offer consultations and setup services to ensure optimal equipment performance at a low cost. We know the principle of the inverter's operation and can help set up your equipment even if you change the inverter for a three-phase motor of another manufacturer. Typically, equipment manufacturers hide operation protocols, but due to our great experience, you can buy a frequency inverter for frequency control and be confident not only in quality but also competitive prices. There are enough goods in stock to meet any needs, but if your request for an inverter is specific and availability does not allow for it, we offer to bring any product within a 60-day period, which are our main advantages.

4. Support and service: In our online store, we guarantee post-sale support, including maintenance and repair if needed at a low cost. We are always ready to assist in resolving any issues, as frequent failures occur due to excessive dust, the frequency inverter must be installed in a cabinet. The warranty period for frequency inverters is 12 months. If you are about to buy a frequency inverter for regulating motor speed, consult with our experts.

5. Competitive prices for inverters: Our prices for frequency inverters are competitive in the market, making us an accessible choice for a wide range of customers. Buying an inverter for a three-phase motor from us is not only simple but also affordable. Delivery in Ukraine is within 2-3 days.

Choosing our online store to purchase a frequency inverter, you get a profitable combination of quality, reliability, and professional service at a competitive price.