UNIFREM 690
The latest generation of unique frequency inverters with artificial intelligence designed for motors from 315 kW to 1400 kW and a supply voltage of 3 x 690 V.
The latest generation of frequency converters with artificial intelligence
Differences compared to UNIFREM 400
01. Output from 315 kW to 1400 kW
The UNIFREM 690 is predestined to solve higher power drive problems in the toughest applications with engine outputs up to 1400 kW.
02. Supply voltage 3 X 690 V
UNIFREM 690 are designed for voltage class 3 x 690 V, in contrast to UNIFREM 400, which are designed for 3 x 400 V, or UNIFREM 500, which are designed for 3 x 500 V.
Characteristics and advantages of UNIFREM
High fault tolerance
UNIFREM has integrated protections against overvoltage, undervoltage, overcurrent, ground fault, short circuit between phases and thermal overheating. The system reacts to input or output phase failures and the calculation of the thermal integral of the motor prevents overheating, thus increasing the long-term service life of the equipment.
Minimal impact on the power grid
Three-phase commutating input chokes minimize the extraction of higher harmonic currents, while standard suppression filters ensure minimal interference to the power grid according to EN 61800-3 and EN 61000-6-4.
Minimal losses – “lossless” inverter
The use of state-of-the-art solid-state power elements virtually eliminates losses in the inverter, minimizing energy dissipation while reducing interference in and around the power system.
Minimised dimensions
The optimization of the power-designed heat sinks and the strategic placement of the power elements allows to achieve significantly reduced device dimensions without compromising on performance.
High reliability
A new generation of power capacitors with increased temperature range and extended lifetime, together with fans equipped with quality bearings, guarantee long-term reliability and quiet operation of the inverter.
Advanced vector control
UNIFREM enables open and closed vector control of asynchronous and synchronous motors with high precision and dynamics. Automatic online parameter adaptation, for example identifying changes in winding resistance or inductance saturation, ensures optimal performance even under changing conditions.
Speed, torque and position control
The device is designed for the most demanding applications where the required speed, torque and position must be precisely maintained. With a high sampling period of 200 µs, it also enables extremely precise position control.
Precise scalar control
Scalar control with U/f curve and slip compensation provides very precise adherence to the desired speed, with control quality comparable to simpler vector control – ideal for applications with smaller requirements.
Rich software equipment
Interactive display listings and a clear parameter structure simplify setup and monitoring of the device. Parameter access is possible in several ways and is supported by different levels of user authority. Integrated logic blocks (PLC) and independent communication lines (RS485, USB, CAN) ensure uniform and flexible operation.
Comprehensive features and flexible optimisation
The device offers kinetic backup for short-term power failures, a fly start on a revved motor and three different braking modes. A versatile PID controller, a fully configurable input and output system, dedicated crane software and the ability to switch between four sets of parameters with user macros allow optimization of power input or maximization of power output to suit specific requirements.
Wide communication compatibility
Support for CANopen, MODBUS and PROFIBUS communication protocols ensures seamless integration with other systems and devices, greatly expanding the inverter’s application possibilities.
Complete history of events and faults
The configurable system logs up to 1,000 fault, warning and event records, greatly facilitating equipment diagnostics and maintenance.
VONSCH Drive Studio
The innovative VONSCH Drive Studio software allows setting up, diagnostics and archiving of data to a PC. It allows firmware upload, parameter reading and archiving, processing of diagnostic data from the “black box” and display of graphical waveforms, thus simplifying the operation and maintenance of the inverter.
VF version for high frequency or special motors up to 3000Hz
All frequency converters are also available in HF versions for high frequency or special motors up to 3000Hz. UNIFREM VFs allow independent adjustment of output voltage and frequency.
Standard equipment
Three-phase commutating choke KT1
Minimises the extraction of higher harmonic currents from the power system (STN EN 61800-3)
Suppression filter
Eliminates interference to the power system (STN EN 61000-6-4)
Brake module
Electronics controlling the switching of the brake resistor when the drive is running in generator mode.
Additional equipment
MT1 motor choke
MT1 motor output chokes are designed for cases where the cable length between the inverter and the motor exceeds 100 meters for an unshielded cable or 50 meters for a shielded cable. The use of these chokes eliminates the effect of cable capacitance on inverter operation.
Braking resistance BO1
Properly sized BO1 braking resistors allow the frequency converters to efficiently convert the energy from a revved engine during rapid braking or generator operation into heat, thus providing controlled engine deceleration and stopping.
Sinusoidal filter SF1
The sinusoidal filter SF1 filters the output pulse voltages of the inverter into sinusoidal voltages of variable frequency and amplitude. This reduces capacitive current peaks and motor insulation stress. When using a special EMC sinusoidal filter, there is no need to use a shielded cable at the inverter output. However, it is necessary to set the switching frequency of the IGBT transistors to at least 4 kHz.
UNIPANEL control panel
UNIPANEL is the universal control device for the latest generation of VONSCH products. The panel can be attached directly to the inverter housing or connected by a cable with a maximum length of 100 meters. It communicates via a fast CAN bus and allows control of up to 99 VONSCH devices. A USB interface is used for communication between the UNIPANEL and a PC, allowing diagnostics, parameter setting, backup and copying of settings between devices. The panel has 13 buttons and a graphical display with support for four languages.
Expansion modules
RM-UNI_IRC1
This module is designed to connect the incremental encoder to the UNIFREM processor board via a plug-in connector. It is used in vector closed-loop control of speed, position or torque. It supports push-pull incremental rotary encoders type HTL with 24 V DC power supply. The module contains circuitry to detect and evaluate encoder errors such as erroneous or disconnected signals.
RM-RDC
This module allows the connection of a resolver-type sensor to the UNIFREM processor board via a plug-in connector. It is designed for vector closed-loop control of speed, position or torque of asynchronous and synchronous motors. The module contains circuitry to detect and evaluate sensor errors such as erroneous or disconnected signals and excessive interference.
Profibus DP
This module is used to connect frequency converters to the PROFIBUS DP network, which is designed for fast master-slave communication. It is suitable for the fast transmission of process signals using decentralized peripherals such as frequency inverters. The communication medium is a twisted-pair cable according to the RS-485 standard.
RM-SERVO
This module allows the connection of absolute position sensors and the interconnection of multiple RM-SERVO modules for multi-axis synchronization. It supports various types of absolute position sensors such as ENDAT, sin/cos and others.
Technical data
| Inverter type | PNOM motor power [kW] | Nominal. inverter output current IN [A] |
|---|---|---|
| UNIFREM 690 500 | 500 | 550 |
| UNIFREM 690 630 | 630 | 660 |
| UNIFREM 690 710 | 710 | 750 |
| UNIFREM 690 800 | 800 | 860 |
| UNIFREM 690 1000 | 1000 | 1080 |
| UNIFREM 690 1200 | 1200 | 1230 |
| UNIFREM 690 1400 | 1400 | 1470 |
– permissible current overload permanent by 7.5% IN, overload by 10% IN for 60 s
Do you need inverters in a different frequency?
Dimensions
| Inverter type | height [mm] | width [mm] | depth [mm] |
|---|---|---|---|
| UNIFREM 690 500 ÷ 630 | 2000 | 1000 | 600 |
| UNIFREM 690 710 ÷ 800 | 2000 | 1400 | 600 |
| UNIFREM 690 1000 ÷ 1400 | 2000 | 2000 | 800 |
General technical data
| Supply voltage: | 3 x 690 V ±10% |
| Frequency e.g. voltages: | 47 to 63 Hz |
| Output voltage: | 3 x 0 to 100% supply voltage |
| Output frequency: | 0 ÷ 500 Hz |
| Converter efficiency: | more than 98.5% |
| Analog inputs: | 4 analog programmable inputs. Possible choices: 0 ÷ 20 mA, 4 ÷ 20 mA, 0 ÷ 10 V, 2 ÷ 10 V auxiliary voltage for potentiometer + 10 V (short-circuit proof) |
| Digital inputs: | 6 digital programmable inputs 1 digital safety input EN 13849-1 category 3 control voltage program selectable + 24 V or 0 V |
| Digital outputs: | 3 relay programmable outputs |
| Analog outputs: | 3 analog programmable outputs 0 ÷ 20 mA or 4 ÷ 20 mA |
| Engine starting torque: | up to 200% Mn (depending on engine type) |
| Electronic inverter protections: | current overload of the converter, overvoltage in the network, undervoltage in the network, ground connection at the output, short circuit between the output phases, thermal integral of the engine, thermal overheating of the converter, input and output phase failure |
| Cooling: | forced air cooling using built-in fans |
| Electromagnetic compatibility (EMC): | Built-in RFI filter for industrial environments according to STN EN 61000-6-4 |
| Elimination of higher harmonic voltages and currents: | built-in three-phase choke reduces harmonics, extends the life of power capacitors, protects the inverter from overvoltage peaks in accordance with ST EN 61800-3 |
| Ambient working temperature: | +1 °C to +40 °C ( STN EN 50178 ), in special version (option) -10 °C to + 40 °C |
| Relative air humidity: | ≤ 90% without corrosive and explosive gases, without water vapor and condensates |
| Coverage: | IP20 as standard, in switchboard version up to IP55 |
