MV4206-1 AC-Motor Drive


MV4206-1 AC-Motor Drive. Three-Phase supply, semi 4-Quadrant Drive

Semi 4Q frequency converter with MOS FET technique and a fixed intermediate DC-link.

Covers the latest development in AC-motor operation with frequency converters. The equipment is designed to work according to different function principles and it is possible to explain several different types of frequency converters existing today.

4-Q-Drive: The Frequency Converter can be used in the conception of speed/torque control and electro-machine theory. The equipment is also suitable for experiments and tests in industries i.e. far beyond the area that the experiments show.

When braking, the energy is transferred by the DC-link and a brake chopper to a built-in load resistor.

There is also an additional adjustable DC-injection brake.

Technical Specification


Input voltage:

3-phase 3 x 400 V + N + PE, 50-60 Hz

Input current:

16 A max

Output Power:

1.5 kW

Output voltage:

3 x 230 V

Max output current:

7 A

Max output frequency:

100 Hz

Choice of polygon:


Breaking points:


Internal switch frequency:

3 kHz max

Type of modulation:

PWM sensorless vector

Intermediate DC-voltage:

average value 300 V DC

Inverter bridge:


Control voltage:

+/- 10V DC analog, 0-24V DC Digital


520 x 450 x 280 mm


16 kg

Built-in Instruments Functions

The enclosed software will make it possible to configure the internal connections and operating principles by using a standard PC. On the screen it is possible to monitor 3 analogue instruments and scroll a number of signals/parameters in parallel, which can be saved and printed. The number of parameters/tags possible to study exceeds 200.

Standard Settings and Advanced Settings

Most parameters are set by default but settings can also be done manually from the front controls: Typically: Speed,  Max Speed, Acc ram,  Flux, Ret ramp,  I-lim etc.

Advanced settings: >200 parameters/tags, are performed by Operator Station on the unit, PC nearby the unit, connected via the comport.


consist of a theory section and exercise section together with a software description. The theory part explains for example general theory of the conditions for torque developed in an arbitrary machine, while the exercise section contains theory that are directly connected to the different experiments.

The instruction manual is enclosed as a complete binder together with a corresponding CD.

Electrical Machines Laboratory