Elektrische Automatisierungs- und Antriebstechnik
EAAT GmbH Chemnitz

Motor-integrated frequency converters of the DMC series

The motor-integrated frequency converters of the DMC series are compact frequency converters for axial installation in the motor housing. Applied customer-specifically, they can be integrated into every motor. Both the signal connections and the power connections can be adapted to your application.

Due to the implementation of various algorithms, they are able to control permanent magnet synchronous motors, asynchronous motors, BLDC motors and switched reluctance motors, for example. These motors can be operated with the help of an encoder or sensorless.

The motor-integrated frequency converters of the DMC series cover a wide range of performance classes.

The compact frequency converter series DMC is e.g. suitable for fans in stationary and mobile applications, compressors and pumps.

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Motor-integrated frequency converters

Advantages of the motor-integrated frequency converters from EAAT

Due to their compact design, the motor-integrated frequency converters from EAAT can be installed in a wide variety of motor types. Our solutions are characterized by their application to customer-specific motor solutions. Our products cover a power range from 1 to 7.5 kW.

Our converters combine modern power electronics and control technology with flexibility and individuality.


Technical Data


Mains input voltage 3 x 400 V ±10 %, 50/60 Hz (more on request)
One-phase networks in implementation
Output power 1,0 kW
2,0 kW
3,5 kW
bis 7,5 kW in implementation
Nominal output current
(at 3 x 400 V-mains input voltage)
1,0 kW: 1,7 A (effektiv)
2,0 kW: 3,4 A (effektiv)
Output voltage Up to approx. 82% of mains input voltage
Output frequency 0 ... 320 Hz
Overload 1,2x for 10 s within 10 min
PWM frequency 8 ... 15 kHz


Position encoder 1 Hall sensor or sensorless
Temperature sensor of motor PTC
Interface 1x analog setpoint (0-10 VDC or PWM with f > 1kHz)
10 V-Output (max. 6 mA) for connecting a setpoint potentiometer
1x Status relay (change-over contact)
Configuration via USB interface adapter
3x digital Inputs (e.g. for separate enable / reset)
RS485 or Modbus RTU (Library file DLL available)
additional analog input
quasi-analog PWM output
Motor contacting Insulation displacement connectors or connectors

Environmental conditions

Working temperature range 0 ... 40 °C
Relative humidityt up to 90 %, without condensation
Working height up to 1000 m above sea level
Degree of pollution (without housing) 1
Degree of protection (with housing) IP54


Commutation Field-oriented control
PWM via space vector control
sinusoidal commutation
Motor types permanent magnet synchronous machines
BLDC motors
Asynchronous machines
more on request
Possible operating modes Voltage control
Speed control
Pressure control
current control
Speed control with subordinate current control
Pressure control with subordinate current control
Monitoring function Short circuit protection (output)
Overvoltage (DC-link)
Undervoltage (DC-link)
Phase failure
Overtemperature (motor, electronics)
Blocking protection
Improved error analysis Max hold functions of temperatures, voltages, power and current
Error memory for the last 4 errors, beyond group error
in addition, collective errors