Frequency Inverter

Stepless speed control of three-phase motors is very important for the productivity and the durability of electric drive. With the help of frequency inverters, one achieves a constant uniform quality of drive train. The inverter generates a voltage of alternating current, which can be adjusted in amplitude and frequency. The three-phase motor is driven by means of this "re-targeted" voltage. Depending on the area of application, there are different types of frequency inverters. For example, for use in pump and fan applications in building technologies or in servo drives in industrial robots and production machines. With the aid of frequency inverters, all these engines can stand strong speed- and torque alternations without getting damaged. The frequency inverter ST9100 G1 and ST9100 G3 by Sourcetronic are stocked with an automatism and self-regulating ramps, so the startup procedure is very simple. All you have to do is to press the start button and the frequency inverter starts working. Sophisticated security features, include but are not limited to "PID Feedback-Abnormity" and "Over Voltage Stall", protect the engine even in difficult working environments. In addition to all power connectors, all frequency inverters are equipped with digital and analogue inputs and outputs and an optional RS485 interface. Other measuring devices, for instance a potentiometer (analogue) to set the output frequency, are easily and quickly to connect. Some of many other functions are four-quadrant drive, encoderless field oriented control with freely programmable, linear V / f characteristic line and sensorless vector control.

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  1. /
    Frequency Inverter ST9100A 0.75KW 400V
    €184.90
    • Power: 0.75 KW
    • Current: 2.5 A
    • Voltage 400V 3-phase (mains/motor)
    • Digital and analogue I/Os
    • Extended PID control
    • Double display (e.g. actual/target freq.)
    • Parameter sets switchable (4 sets of ramps)
    • Overload ability: 1min. 150% / 2 sec. 180%
    • Integrated DC brake
    • Control panel switchable (LAN-cable)
    • Automatically identification of motor parameters
    • Integrated protection concept
    • Integrated RS485 interface
    • Several accessories: CANbus, Profibus, PG cards, EMI filter, brake resistors, Software ST®9000 Bundle, ST®DLV 1.0 LabView, ST®APP 1.1 Android
    Learn More
  2. /
    Frequency Inverter ST9100A 1.5KW 400V
    €203.36
    • Power: 1.5 KW
    • Current: 3.8 A
    • Voltage 400V 3-phase (mains/motor)
    • Digital and analogue I/Os
    • Extended PID control
    • Double display (e.g. actual/target freq.)
    • Parameter sets switchable (4 sets of ramps)
    • Overload ability: 1min. 150% / 2 sec. 180%
    • Integrated DC brake
    • Control panel switchable (LAN-cable)
    • Automatically identification of motor parameters
    • Integrated protection concept
    • Integrated RS485 interface
    • Several accessories: CANbus, Profibus, PG cards, EMI filter, brake resistors, Software ST®9000 Bundle, ST®DLV 1.0 LabView, ST®APP 1.1 Android
    Learn More
  3. /
    Frequency Inverter ST9100A 2.2KW 400V
    €224.90
    • Power: 2.2KW
    • Current: 5.1 A
    • Voltage 400V 3-phase (mains/motor)
    • Digital and analogue I/Os
    • Extended PID control
    • Double display (e.g. actual/target freq.)
    • Parameter sets switchable (4 sets of ramps)
    • Overload ability: 1min. 150% / 2 sec. 180%
    • Integrated DC brake
    • Control panel switchable (LAN-cable)
    • Automatically identification of motor parameters
    • Integrated protection concept
    • Integrated RS485 interface
    • Several accessories: CANbus, Profibus, PG cards, EMI filter, brake resistors, Software ST®9000 Bundle, ST®DLV 1.0 LabView, ST®APP 1.1 Android
    Learn More
  4. /
    Frequency Inverter ST9100A 4KW 400V
    €269.90
    • Power: 4KW
    • Current: 9 A
    • Voltage 400V 3-phase (mains/motor)
    • Digital and analogue I/Os
    • Extended PID control
    • Double display (e.g. actual/target freq.)
    • Parameter sets switchable (4 sets of ramps)
    • Overload ability: 1min. 150% / 2 sec. 180%
    • Integrated DC brake
    • Control panel switchable (LAN-cable)
    • Automatically identification of motor parameters
    • Integrated protection concept
    • Integrated RS485 interface
    • Several accessories: CANbus, Profibus, PG cards, EMI filter, brake resistors, Software ST®9000 Bundle, ST®DLV 1.0 LabView, ST®APP 1.1 Android
    Learn More
  5. /
    Frequency Inverter ST9100A 5.5KW 400V
    €315.13
    • Power: 5.5KW
    • Current: 13 A
    • Voltage 400V 3-phase (mains/motor)
    • Digital and analogue I/Os
    • Extended PID control
    • Double display (e.g. actual/target freq.)
    • Parameter sets switchable (4 sets of ramps)
    • Overload ability: 1min. 150% / 2 sec. 180%
    • Integrated DC brake
    • Control panel switchable (LAN-cable)
    • Automatically identification of motor parameters
    • Integrated protection concept
    • Integrated RS485 interface
    • Several accessories: CANbus, Profibus, PG cards, EMI filter, brake resistors, Software ST®9000 Bundle, ST®DLV 1.0 LabView, ST®APP 1.1 Android
    Learn More
  6. /
    Frequency Inverter ST9100A 7.5KW 400V
    €375.63
    • Power: 7.5KW
    • Current: 17 A
    • Voltage 400V 3-phase (mains/motor)
    • Digital and analogue I/Os
    • Extended PID control
    • Double display (e.g. actual/target freq.)
    • Parameter sets switchable (4 sets of ramps)
    • Overload ability: 1min. 150% / 2 sec. 180%
    • Integrated DC brake
    • Control panel switchable (LAN-cable)
    • Automatically identification of motor parameters
    • Integrated protection concept
    • Integrated RS485 interface
    • Several accessories: CANbus, Profibus, PG cards, EMI filter, brake resistors, Software ST®9000 Bundle, ST®DLV 1.0 LabView, ST®APP 1.1 Android
    Learn More
  7. Frequency Inverter ST9200 11KW
    Frequency Inverter ST9200 11KW
    €491.60
    • Power: 11KW
    • Current: 25 A
    • Voltage 400V 3-phase (mains/motor)
    • Digital- and analogue I/O's
    • Extended PID control
    • Double display (e.g. acutal-/target freq.)
    • Parameter sets switchable (4)Overload ability: 1min. 150% / 2 sec. 180%
    • Integrated DC brake
    • Control panel switchable (LAN-cable)
    • Automatically identification of motor parameters
    • Integrated protection concept
    • Several accessories: RS485, EMI filter, brake resistors, Software ST®9000 Bundle, ST®DLV 1.0 LabView, ST®APP 1.1 Android
    Learn More
  8. Frequency Inverter ST9200 15KW
    Frequency Inverter ST9200 15KW
    €638.66
    • Power: 15KW
    • Current: 32 A
    • Voltage 400V 3-phase (mains/motor)
    • Digital- and analogue I/O's
    • Extended PID control
    • Double display (e.g. acutal-/target freq.)
    • Parameter sets switchable (4)Overload ability: 1min. 150% / 2 sec. 180%
    • Integrated DC brake
    • Control panel switchable (LAN-cable)
    • Automatically identification of motor parameters
    • Integrated protection concept
    • Several accessories: RS485, EMI filter, brake resistors, Software ST®9000 Bundle, ST®DLV 1.0 LabView, ST®APP 1.1 Android
    Learn More
  9. Frequency Inverter ST9200 18KW
    Frequency Inverter ST9200 18KW
    €714.29
    • Power: 18.5KW
    • Current: 37 A
    • Voltage 400V 3-phase (mains/motor)
    • Digital- and analogue I/O's
    • Extended PID control
    • Double display (e.g. acutal-/target freq.)
    • Parameter sets switchable (4)Overload ability: 1min. 150% / 2 sec. 180%
    • Control panel switchable (LAN-cable)
    • Automatically identification of motor parameters
    • Integrated protection concept
    • Several accessories: RS485, EMI filter, brake resistors, Software ST®9000 Bundle, ST®DLV 1.0 LabView, ST®APP 1.1 Android
    Learn More
  10. Frequency Inverter ST9200 22KW
    Frequency Inverter ST9200 22KW
    €907.56
    • Power: 22KW
    • Current: 45 A
    • Voltage 400V 3-phase (mains/motor)
    • Digital- and analogue I/O's
    • Extended PID control
    • Double display (e.g. acutal-/target freq.)
    • Parameter sets switchable (4)Overload ability: 1min. 150% / 2 sec. 180%
    • Control panel switchable (LAN-cable)
    • Automatically identification of motor parameters
    • Integrated protection concept
    • Several accessories: RS485, EMI filter, brake resistors, Software ST®9000 Bundle, ST®DLV 1.0 LabView, ST®APP 1.1 Android
    Learn More
  11. Frequency Inverter ST9200 30KW
    Frequency Inverter ST9200 30KW

    Price on request

    • Power: 30KW
    • Current: 60 A
    • Voltage 400V 3-phase (mains/motor)
    • Digital- and analogue I/O's
    • Extended PID control
    • Double display (e.g. acutal-/target freq.)
    • Parameter sets switchable (4)Overload ability: 1min. 150% / 2 sec. 180%
    • Control panel switchable (LAN-cable)
    • Automatically identification of motor parameters
    • Integrated protection concept
    • Several accessories: RS485, EMI filter, brake resistors, Software ST®9000 Bundle, ST®DLV 1.0 LabView, ST®APP 1.1 Android
    Learn More
  12. /
    Frequency Inverter ST9100A 0.75KW 230V
    €154.90
    • Power: 0.75 KW
    • Current: 4 A
    • Voltage 230V 1-phase/3-phase (mains/motor)
    • Digital- and analogue I/Os
    • Extended PID control
    • Double display (e.g. acutal-/target freq.)
    • Parameter sets switchable (4)
    • Overload ability: 1min. 150% / 2 sec. 180%
    • Integrated DC brake
    • Control panel switchable (LAN-cable)
    • Automatically identification of motor parameters
    • Integrated protection concept
    • Several accessories: EMI filter, brake resistors, Software ST®9000 Bundle, ST®DLV 1.0 LabView, ST®APP 1.1 Android
    Learn More
  13. /
    Frequency Inverter ST9100A 1.5KW 230V
    €164.90
    • Power: 1.5 KW
    • Current: 7 A
    • Voltage 230V 1-phase/3-phase (mains/motor)
    • Digital and analogue I/O's
    • Extended PID control
    • Double display (e.g. actual/target freq.)
    • Parameter sets switchable (4)
    • Overload ability: 1min. 150% / 2 sec. 180%
    • Integrated DC brake unit
    • Control panel relocatable (LAN-cable RJ45)
    • Automatically identification of motor parameters
    • Integrated protection concept
    • Several accessories: EMI filter, brake resistors, Software ST®9000 Bundle, ST®DLV 1.0 LabView, ST®APP 1.1 Android
    Learn More
  14. /
    Frequency Inverter ST9100A 2.2KW 230V
    €184.87
    • Power: 2.2 KW
    • Current: 10 A
    • Voltage 230V 1-phase/3-phase (mains/motor)
    • Digital- and analogue I/O's
    • Extended PID control
    • Double display (e.g. acutal-/target freq.)
    • Parameter sets switchable (4)Overload ability: 1min. 150% / 2 sec. 180%
    • Integrated DC brake
    • Control panel switchable (LAN-cable)
    • Automatically identification of motor parameters
    • Integrated protection concept
    • Several accessories: EMI filter, brake resistors, Software ST®9000 Bundle, ST®DLV 1.0 LabView, ST®APP 1.1 Android
    Learn More
  15. /
    Frequency Inverter ST9100A 4KW 230V
    €231.09
    • Power: 4 KW
    • Current: 17 A
    • Voltage 230V 1-phase/3-phase (mains/motor)
    • Digital- and analogue I/O's
    • Extended PID control
    • Double display (e.g. acutal-/target freq.)
    • Parameter sets switchable (4)Overload ability: 1min. 150% / 2 sec. 180%
    • Integrated DC brake
    • Control panel switchable (LAN-cable)
    • Automatically identification of motor parameters
    • Integrated protection concept
    • Several accessories: EMI filter, brake resistors, Software ST®9000 Bundle, ST®DLV 1.0 LabView, ST®APP 1.1 Android
    Learn More
  16. /
    Frequency Inverter ST9200 5.5KW 230V
    €417.65
    • Power: 5.5 KW
    • Current: 25 A
    • Voltage 230V 1-phase/3-phase (mains/motor)
    • Digital- and analogue I/O's
    • Extended PID control
    • Double display (e.g. acutal-/target freq.)
    • Parameter sets switchable (4)Overload ability: 1min. 150% / 2 sec. 180%
    • Integrated DC brake
    • Control panel switchable (LAN-cable)
    • Automatically identification of motor parameters
    • Integrated protection concept
    • Several accessories: EMI filter, brake resistors, Software ST®9000 Bundle, ST®DLV 1.0 LabView, ST®APP 1.1 Android
    Learn More
  17. /
    Frequency Inverter ST9200 7.5KW 230V
    €629.00
    • Power: 7.5 KW
    • Current: 32 A
    • Voltage 230V 1-phase/3-phase (mains/motor)
    • Digital- and analogue I/O's
    • Extended PID control
    • Double display (e.g. acutal-/target freq.)
    • Parameter sets switchable (4)Overload ability: 1min. 150% / 2 sec. 180%
    • Integrated DC brake
    • Control panel switchable (LAN-cable)
    • Automatically identification of motor parameters
    • Integrated protection concept
    • Several accessories: RS485, EMI filter, brake resistors, Software ST®9000 Bundle, ST®DLV 1.0 LabView, ST®APP 1.1 Android
    Learn More
  18. /
    Frequency Inverter ST9200 11KW 230V
    €982.00
    • Power: 11 KW
    • Current: 45 A
    • Voltage 230V 1-phase/3-phase (mains/motor)
    • Digital- and analogue I/O's
    • Extended PID control
    • Double display (e.g. acutal-/target freq.)
    • Parameter sets switchable (4)Overload ability: 1min. 150% / 2 sec. 180%
    • Integrated DC brake
    • Control panel switchable (LAN-cable)
    • Automatically identification of motor parameters
    • Integrated protection concept
    • Several accessories: RS485, EMI filter, brake resistors, Software ST®9000 Bundle, ST®DLV 1.0 LabView, ST®APP 1.1 Android
    Learn More
  19. /
    Frequency Inverter ST9200 15KW 230V
    €1,316.00
    • Power: 15 KW
    • Current: 60 A
    • Voltage 230V 1-phase/3-phase (mains/motor)
    • Digital- and analogue I/O's
    • Extended PID control
    • Double display (e.g. acutal-/target freq.)
    • Parameter sets switchable (4)Overload ability: 1min. 150% / 2 sec. 180%
    • Integrated DC brake
    • Control panel switchable (LAN-cable)
    • Automatically identification of motor parameters
    • Integrated protection concept
    • Several accessories: RS485, EMI filter, brake resistors, Software ST®9000 Bundle, ST®DLV 1.0 LabView, ST®APP 1.1 Android
    Learn More
  20. /
    Frequency Inverter ST9200 18KW 230V
    €1,388.00
    • Power: 18 KW
    • Current: 75 A
    • Voltage 230V 1-phase/3-phase (mains/motor)
    • Digital and analogue I/Os
    • Extended PID control
    • Double display (e.g. acutal-/target freq.)
    • Parameter sets switchable (4)
    • Overload ability: 1min. 150% / 2 sec. 180%
    • Control panel switchable (LAN-cable)
    • Automatically identification of motor parameters
    • Integrated protection concept
    • Several accessories: RS485, EMI filter, brake resistors, Software ST®9000 Bundle, ST®DLV 1.0 LabView, ST®APP 1.1 Android
    Learn More
  21. Frequency Inverter ST130 0.4KW 230V
    Frequency Inverter ST130 0.4KW 230V
    €104.00
    • Power: 0.4 KW
    • Current: 2.5 A
    • Voltage 230V 1-phase/3-phase (mains/motor)
    • Digital- and analogue I/O's
    • Extended PID control
    • Overload ability: 1min. 150% / 2 sec. 180%
    • Automatically identification of motor parameters
    • Integrated protection concept
    Learn More
  22. Frequency Inverter ST130 0.75KW 230V
    Frequency Inverter ST130 0.75KW 230V
    €109.00
    • Power: 0.75 KW
    • Rated output Current: 4 A
    • Voltage 230V 1-phase/3-phase (mains/motor)
    • Digital- and analogue I/O's
    • Extended PID control
    • Overload ability: 1min. 150% / 2 sec. 180%
    • Automatically identification of motor parameters
    • Integrated protection concept
    Learn More
  23. Frequency Inverter ST130 0.75KW G2
    Frequency Inverter ST130 0.75KW G2
    €139.00
    • Power: 0.75 KW
    • Rated output current: 4 A
    • Voltage 230V 3-phase/3-phase (mains/motor)
    • Digital- and analogue I/O's
    • Extended PID control
    • Overload ability: 1min. 150% / 2 sec. 180%
    • Automatically identification of motor parameters
    • Integrated protection concept
    Learn More
  24. Frequency Inverter ST130 1.5KW 230V
    Frequency Inverter ST130 1.5KW 230V
    €119.00
    • Power: 1.5 KW
    • Current: 7 A
    • Voltage 230V 1-phase/3-phase (mains/motor)
    • Digital- and analogue I/Os
    • Extended PID control
    • Overload ability: 1min. 150% / 2 sec. 180%
    • Automatically identification of motor parameters
    • Integrated protection concept
    Learn More
  25. Frequency Inverter ST9200 37KW
    Frequency Inverter ST9200 37KW

    Price on request

    • Power: 37KW
    • Current: 75 A
    • Voltage 400V 3-phase (mains/motor)
    • Digital- and analogue I/O's
    • Extended PID control
    • Double display (e.g. acutal-/target freq.)
    • Parameter sets switchable (4)Overload ability: 1min. 150% / 2 sec. 180%
    • Control panel switchable (LAN-cable)
    • Automatically identification of motor parameters
    • Integrated protection concept
    • Several accessories: RS485, EMI filter, brake resistors, Software ST®9000 Bundle, ST®DLV 1.0 LabView, ST®APP 1.1 Android
    Learn More

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What is a frequency converter? - A definition

A frequency converter ensures the proper transformation of the current from the local distribution network. The current from the power socket is a uniform alternating voltage. However, many devices require an alternating voltage, where the amplitude and the frequency can be adjusted. This is done by means of a frequency converter, which, for instance, also allows for the use of a three-phase motor. A frequency converter usually consists of a rectifier, feeding a DC link.This DC link includes several buffer condensators to prevent any disturbances and smoothen the DC voltage.This is followed by an inverter, which, by means of pulse width modulation, transforms the DC voltage into a thee-phase alternating voltage with adjustable frequency and amplitude. Concerning three-phase motors, it is especially important to apply a frequency converter. Without the converter, you would not be able to control the speed of the motor. In this case, the motor would run with its typical, mains frequency-dependent nominal speed.Frequency converters also support additional functions, such as the load-dependent control of powertrains, gears and pumps. Frequency converters are available with different input configurations. Most notably,two- or three-phase converters are common. One-phase or two-wire operation is suitable for the use with common shockproof sockets, 230V, whereas three-phase operation is intended for 400V three-phase current supply only.

How do I connect a frquency converter?

You can connect every single frequency converter from the Sourcetronic shop with effortless ease.Here you can learn how to do so, using the example of the ST-9000 frequency converter.

  • Open up the casing at the lower edge of the frequency converter, by removing both flaps. You can now see the control clamps (above) and the power clamps (below). Insert the mains supply lines: For a one-phase 230V G1 converter, apply phase and neutral wire to the "R" and "T" clamps.
  • The phase position can be disregarded.
  • Connect the protective conductor to the ground terminal on the right side of the terminal strip. If you own a 400V G3 converter, the clamps "R", "S" and "T" must be used for the three phase wires.
  • The neutral wire is not required.
  • Turning on the power supply, the number 50 will appear on the display, indicating a frequency of 50 Hertz.
  • If everything is working properly, you should remove your frequency converter from the mains supply once again.
  • Afterwards, connect the motor straight to the converter. Use the "U", "V" and "W" clamps as well as the ground terminal. Switch the the mains supply back on. You can now start and stop the motor via the control panel and adjust the frequency with the control dial.
  • Advice: You can simply remove the control panel and extend it by means of a LAN cable. By doing so, you can also control the converter from a distance.