✔ Power Supply: Single-phase 230V
✔ Motor Rated Power: 0.4 kW to 2.2 kW
✔ Power Supply: 400V
✔ Motor Rated Power: 1.5 kW to 110 kW
✔ Power Supply: 400V
✔ Motor Rated Power: 1.5 kW to 500 kW
Features
✔Robustness
✔Safety
✔Reliability
Enjoy a worry-free operating environment thanks to integrated features such as C3 filters, DC chokes, braking choppers, and STO for enhanced safety.
Benefit from protection against voltage and current fluctuations, ground faults, overloads, overheating, phase loss, and communication errors.
✔Precise Control
✔Exceptional Performance
Experience precise motor control and seamlessly handle overload situations with advanced V/f and vector control, as well as PID functionality.
Achieve outstanding performance even with sudden load changes and ensure consistent operation in demanding scenarios.
✔User-Friendly
✔Easy Installation & Maintenance
Effortlessly control the VFD’s functions, even without programming experience, thanks to its intuitive commissioning and parameterization.
Benefit from effortless installation and maintenance due to the compact design and convenient plug-in cooling fan.
✔Cost Efficiency
✔Value for Money
Benefit from top-notch VFD performance without breaking your budget – our products are more than 20% cheaper than comparable offerings on the market.
Receive premium features and capabilities at an affordable price to ensure a great return on your investment.
Trustworthiness & Recognition
1.000.000 +
Over 1,000,000 satisfied customers worldwide
22
Each unit undergoes 22 rigorous tests before shipping.
5
5 testing laboratories
748
Achieved 748 invention patents in the field of drive technology
TÜV SÜD A.C.T. (ACCEPTANCE OF CLIENT TESTING)
FAQ
We understand that concerns about installation can arise. We want to assure you that our Variable Frequency Drive installation process is designed to be straightforward. Each VFD unit is accompanied by a detailed step-by-step installation guide tailored to the specific model. Additionally, our support team is ready to provide expert assistance if needed. Whether you are an experienced technician or new to working with VFDs, our installation resources and team are here to help you confidently set up your VFD for optimal performance.
Our Variable Frequency Drives are optimally designed to work with various types of motors, including direct-drive motors, asynchronous servo motors, permanent magnet synchronous motors, inverter motors, motorized spindles, and asynchronous motors. This versatility ensures seamless integration of our Variable Frequency Drives with your specific motor type, enabling efficient and precise control tailored to your needs. If you have specific motor requirements or questions, please don’t hesitate to reach out to us. Our expert team is available to provide individualized guidance based on your motor needs.
Our Variable Frequency Drives are manufactured with high-quality components and undergo up to 22 rigorous tests throughout the entire production process. Our products consistently meet international industry standards and often exceed them, including certifications from TÜV SÜD and UL. This commitment to quality is further reinforced by our consistently positive customer feedback and the industry-recognized reliability and performance of our products.
We provide comprehensive technical support to ensure your success. Our experts are available to answer your questions and assist you with any challenges you may encounter.
Yes, we also place great importance on the satisfaction of our customers even after the purchase. Our customer service includes maintenance tips, troubleshooting assistance, and updates to ensure that your Variable Frequency Drive always operates optimally.
Absolutely. We understand that price is an important consideration. Our prices are not only competitive but strategically designed to offer exceptional value. In fact, our prices consistently remain at least 20% lower than comparable products offered by other providers in the market. This means that you not only receive high-quality Variable Frequency Drives but also make significant savings on your investment. We are committed to transparency and provide cost-effective solutions that exceed your expectations.
Absolutely, we have extensive experience across various industries. Our expert team understands the unique challenges and requirements of different sectors. This deep understanding allows us to provide tailored solutions that address the specific needs of your industry. Rest assured, we are well-equipped to deliver the right Variable Frequency Drive solution perfectly aligned with the demands of your industry.
WHAT TO CONSIDER WITH A VARIABLE FREQUENCY DRIVE?
Application Requirements
Understand the specific requirements of your application. Consider factors such as motor power, voltage and current ratings, type of load, and its characteristics.
Think about the required speed range and torque control. Also, consider any special performance requirements, such as high starting torque or precise speed control, that the Variable Frequency Drive (VFD) needs to meet.
Motor Compatibility
Ensure that the VFD is compatible with your motor.
Check whether it’s an asynchronous motor, synchronous motor, or another motor type. Review the VFD’s specifications to confirm motor compatibility.
Control Methods
Evaluate the control methods of the VFD. Choose the method that best suits your application.
Variable Frequency Control (V/f) is often used for simple applications. For more demanding applications requiring precise speed and torque control, sensorless vector control or closed-loop vector control is preferred.
Protection Features
Look for integrated protection features such as overload protection, short-circuit protection, over- or under-voltage protection, emergency stop functionality, and motor protection.
These features contribute to safe operation and protect your equipment and personnel.
Communication and Integration
Check if the VFD supports the necessary communication protocols, including Modbus, Profibus, or Ethernet/IP. This enables communication capabilities with other systems or devices.
This allows for seamless integration into your existing automation infrastructure.
Environmental Conditions
Assess the environmental conditions in which the VFD will operate. Consider factors like temperature, humidity, dust, and vibration levels.
Select a VFD while paying attention to protection classes and environmental specifications. This ensures reliable operation in your specific environment.
TIPS FOR SIZING THE VFD FOR THE MOTOR
Sizing a Variable Frequency Drive (VFD) involves determining the appropriate size based on the motor’s power rating, which can be in kilowatts (kW) or horsepower (HP). Factors such as Full Load Amps (FLA), derating factors, and specific application requirements must also be considered. Here’s an example:
Motor Power
Determine the motor power rating in kilowatts (kW) or horsepower (HP). This information is typically found in the motor’s specifications or on its nameplate. For example, let’s consider a motor with a power rating of 10 HP, which is approximately 7.5 kW.
Full Load Amps (FLA)
Find the Full Load Amps (FLA) value for the motor. FLA represents the current the motor draws at full load. For instance, let’s assume the FLA value for the 10 HP motor is 15 amperes.
Derating Factors
Take into account any derating factors, which depend on specific application conditions such as altitude, ambient temperature, and the number of VFDs installed in close proximity.
Derating factors consider variations in operating conditions and ensure that the VFD operates within its specified limits. A common derating factor is 0.8 (80%), meaning that under certain conditions, the VFD should be rated for 125% of the motor’s FLA to ensure reliable operation.
Calculation Method
Choose a VFD with a current rating that meets or exceeds the motor’s FLA: The VFD should be capable of handling at least the full load current of the motor.
Apply Derating if Necessary: If your application conditions require derating, select a VFD with a higher nominal current rating to compensate. For instance, if the motor’s FLA is 15 Amps and the derating factor is 0.8 due to high ambient temperature, the VFD should have a nominal current rating of at least 18.75 Amps (15 A ÷ 0.8) to ensure safe operation.
Consider Overload Capacity: Many VFDs are designed to handle short-term overloads (e.g., 150% of rated current for one minute). Ensure that the VFD you choose can handle any potential overloads that may occur during operation.
Example Calculation:
Let’s apply this method to our example:
- Motor Power: 10 HP (7.5 kW)
- FLA: 15 Amps
- Environment: Standard conditions, no derating needed
In this scenario, you would select a VFD with a nominal current rating of at least 15 Amps. However, if the environment required a derating factor of 0.8, you would need to choose a VFD with a current rating of at least 18.75 Amps to ensure it can handle the motor’s FLA under the specific conditions.
FACTS ABOUT VARIABLE FREQUENCY DRIVES
What is a Variable Frequency Drive?
A Variable Frequency Drive, also known as a VFD or inverter, is an essential electronic device in the industry.
It converts the provided alternating current from the local power grid into individually adjustable alternating current with a variable amplitude and frequency. This allows voltages to be precisely tailored to the connected device, enabling optimal performance.
The primary purpose of Variable Frequency Drives is to optimize the starting and speed control of three-phase induction motors. VFDs enable the continuous adjustment of a motor’s speed, expanding the speed range without altering the torque. However, the output torque decreases when the motor’s rated speed is exceeded.
Variable Frequency Drives can be powered by different types of currents, depending on the type and model, including single-phase alternating current and three-phase alternating current.
How does a Variable Frequency Drive work?
The operation is based on the motor’s speed being directly dependent on the frequency of the applied alternating current. The Variable Frequency Drive (VFD) first converts the input voltage from the power grid into direct current, which is then stored in the DC link.
Subsequently, this DC voltage is converted by the inverter into variable alternating current, the frequency of which can be changed. The variable alternating current is then fed to the motor to control its speed. The VFD continuously controls the frequency of the alternating current to regulate the motor’s speed.
Basic Components:
Rectifier The rectifier is responsible for converting the alternating current supply of the VFD into direct current. It consists of a bridge circuit of diodes that rectify the alternating current into direct current.
The rectifier is equipped with electromagnetic interference (EMI) filters to ensure that no network disturbances enter the VFD and that no disturbances are emitted into the power grid.
DC Link The DC link consists of a capacitor and, optionally, inductors. The capacitor smoothes the direct voltage generated by a rectifier. Inductors help reduce current fluctuations.
The brake chopper, also known as a chopper, is an important component of the DC link and is integrated into the circuit.
The brake chopper consists of an electronic switch (Transistor T7) and a braking resistor (R). During braking, the motor generates excess energy. The brake chopper then activates the braking resistor.
This converts the excess energy into heat, effectively braking the motor. This improves energy efficiency and protects the motor.
Inverter It converts direct current into three-phase alternating current, supplying the connected motor with variable frequency and voltage. The inverter consists of power electronic switches like MOSFETs, IGBTs, or IGC thyristors.
These are controlled through pulse-width modulation (PWM), regulating the amplitude and frequency of the output voltage. The inverter is controlled by sophisticated control electronics.
Control Electronics It controls the power transistors, regulating the frequency and voltage of the output signal according to the specific requirements and desired application and motor load.
Types of Variable Frequency Drives
- Depending on the voltage level, there are different types of Variable Frequency Drives: low-voltage VFDs, medium-voltage VFDs, and high-voltage VFDs. Low-voltage VFDs include single-phase 220V VFDs, three-phase 220V VFDs, and three-phase 380V VFDs.
Medium-voltage VFDs typically operate at voltages of 500V, 660V, and 1140V.
High-voltage VFDs operate at voltages of 6 kV and 10 kV.”
- In terms of the method of frequency conversion, there are two main categories: AC-AC Variable Frequency Drives and AC-DC-AC Variable Frequency Drives. The AC-AC Variable Frequency Drive directly converts the network alternating current. It is referred to as a direct Variable Frequency Drive because the AC voltage is both frequency and voltage controllable.
The AC-DC-AC Variable Frequency Drive first converts the network alternating current into direct current, which is then converted into frequency and voltage controllable alternating current. Hence, it is referred to as an indirect Variable Frequency Drive.
- The operation of the main circuit allows for a distinction between voltage-controlled Variable Frequency Drives and current-controlled Variable Frequency Drives. The Variable Frequency Drive converts network alternating current into direct current. This direct current is then converted into adjustable frequency using a three-phase bridge inverter circuit. This frequency is supplied to the motor. The DC link of the voltage-controlled Variable Frequency Drive uses a large capacitor.
The current-controlled Variable Frequency Drive differs from the voltage-controlled one. The main difference lies in the DC link of the direct current, which employs significant inductive filtering. This also leads to differences in energy storage between the two.
- Based on the operating principle, Variable Frequency Drives can be categorized into V/f control Variable Frequency Drives and vector control Variable Frequency Drives. The V/f control Variable Frequency Drive is simple in construction but uses an open-loop control and cannot achieve high control performance. Torque compensation is required at low frequencies to modify the torque characteristic at low frequencies.
Vector control is also known as field-oriented control (FOC). It is a technique used to control three-phase induction motors using Variable Frequency Drives. It adjusts the output frequency, the output voltage, and the angle of the Variable Frequency Drive to control the motor’s output power.
Its uniqueness lies in its ability to separately control the magnetic field and torque of the motor, similar to a separately excited DC motor.
The output current and voltage are represented in vector form, known as vector control. This occurs during the processing stage. The output current is three-phase.
When do you need a Variable Frequency Drive?
A Variable Frequency Drive (VFD) is necessary when precise control of motor speed or rotation is required. Simple electrical voltage control is insufficient for this purpose.
VFDs are commonly used to regulate pump or fan speeds, thereby controlling flow rates or airflow.
VFDs can be employed to improve the energy efficiency of electric motors. They reduce energy consumption when the motor is not operating at full load.
Motor protection applications extend further. They can reduce startup shock loads, thereby extending the motor’s lifespan.
Additional applications include conveyors, cranes, or hoists, which require precise control of movement speed.
Which motors are suitable for Variable Frequency Drives?
Variable Frequency Drives (VFDs) can be operated with various types of motors, provided that the motors have compatible voltage and power ratings. When selecting a motor for use with a VFD, it’s important to choose the right one, and certain motor types may be better suited for specific applications.
An asynchronous three-phase induction motor is the most commonly used motor in conjunction with a VFD. It is simple in construction, robust, and offers good performance at low to medium speeds. The VFD adjusts the frequency and voltage of the current supplied to the motor, allowing the induction motor to operate effectively over a wide range of speeds.
Another option is synchronous motors, which maintain a constant speed regardless of the load. These motors are ideal for applications that require precise speed control, such as robotics and high-torque drives.
Direct current (DC) motors can also be operated with VFDs, but it requires special control to vary the speed. These motors are less common due to their complexity and cost.
It’s important to note that not all motors are compatible with VFDs. In particular, older motors may not be designed for variable frequency operation. Using a VFD with an incompatible motor can lead to damage. Therefore, it’s essential to check the compatibility of the existing motor with a VFD and seek expert advice if needed before using a VFD.
What are the benefits of a Variable Frequency Drive?
- Energy Savings through Demand-Based Speed Control
One of the key benefits of variable frequency drives (VFDs) is the ability to precisely control the speed of machinery and equipment. Precise control saves energy, as only as much energy as needed is consumed.
Machines without VFDs always consume the same amount of energy, regardless of whether it’s needed or not. Energy savings for fans, pumps, compressors, etc., can be around 30-50% compared to traditional speed control methods.
For instance, consider a pump that transfers water from one container to another. Without a VFD, the pump always runs at the same speed, regardless of how much water needs to be transported. With a VFD, the pump’s speed can be precisely adjusted to match the demand, resulting in significant energy savings and cost reduction.
- Extended Machine and Equipment Lifespan through Reduced Stress
The use of VFDs can also extend the lifespan of machines and equipment. When a machine operates at the same speed continuously, it can lead to overloading over time. A VFD can reduce the machine’s load, allowing it to operate only as fast as necessary.
Another example is a conveyor system transporting heavy objects from one place to another. Without a VFD, the system always runs at the same speed and quickly wears out due to the heavy load. A VFD can adjust the conveyor’s speed based on the load, prolonging its lifespan.
- Increased Productivity through Precise Speed Control
VFDs can also boost productivity by enabling precise speed control of machinery and equipment. Precise speed control allows machines and systems to be tailored precisely to a company’s needs. This means production processes can be accelerated or slowed down to achieve higher efficiency.
For example, consider a cutting machine in a factory. Without a VFD, it cuts at the same speed, regardless of the material being processed. A VFD allows the speed to be precisely adjusted to the material, resulting in higher precision and increased productivity.
- Reduced Noise and Vibration for a Pleasant Working Environment
VFDs can also contribute to improving working conditions in companies. Precise speed control reduces noise and vibrations, creating a more pleasant work environment.
For example, in an office building, an HVAC system without a VFD would run at a fixed speed, generating a lot of noise. A VFD allows the HVAC system’s speed to be adjusted precisely according to demand, reducing noise and vibrations
