Nidec ASI Mentor MP DC Drives

Sufficient functionality, high reliability, competitive price, availability of warranty and post–warranty service are the main criteria on the basis of which technical and commercial services of enterprises choose equipment. Our company has made its choice, and for a decade we have been actively using electrical equipment in projects to modernize DC and AC electric drives Leroy-Somer and Nidec ASI (Control Techniques).

Within the framework of this website, we want to introduce you to the possibilities and features of the use of digital thyristor electric drives Mentor MP designed to control DC collector electric motors with independent excitation.

Mentor MP – this is a modern multifunctional DC drive of the 5th generation, which allows engineers and developers to find optimal solutions in the field of technology automation. Built on the basis of the Solution Platform, the Mentor MP electric drive received all the intellectual capabilities, optional modules and software products from the Unidrive SP converter.

Optimally selected configuration of analog and digital inputs and outputs, support of industrial communication protocols Profibus, CANopen, Devicenet, Interbus, Ethernet, EtherCAT provides easy integration of this electrical equipment into a control system of any level.

The construction of a control system using a Mentor MP DC electric drive can significantly improve control accuracy, reliability, and improve the dynamic characteristics of technological equipment. In most cases, an improvement in the characteristics of the equipment is achieved by using a previously installed DC electric motor (if necessary, you may be offered Leroy-Somer electric machines of the LSK series, T-T Electric series LAK, LAKC to see detailed information).

We are ready to supply the equipment you are interested in on the day of application, we have our own warehouse of thyristor drives with a current of up to 1200A (more than 70 units in stock).

Technical characteristics of Mentor MP DC drives

• Rated operating current: 25 – 1850 A (up to 7400A with parallel connection);
• Rated supply voltage: 400V /575V /690V;
• Built-in field controller in the excitation circuit: 8 А (габарит 1A, 1B), 20 А (габарит 2A, 2B, 2C, 2D);
• Additional equipment: external field control module FXMP25 up to 25A, mains chokes and reactors, EMC filters, brake resistors.

Configuration of inputs/outputs of the Mentor MP electronic speed controller

• 3 analog inputs + 2 analog outputs;
• 3 digital programmable inputs + - 3 digital programmable inputs/outputs;
• emergency shutdown input of the drive;
• 2 built-in programmable status relays for 2A current;
• built-in power supplies +10V, +24V DC (only for building control circuits);
• tachogenerator and encoder connection connectors;
• 3 built-in slots for universal SM modules (optional modules);
• a SmarCard memory card and a slot for connecting it (loading/unloading, storing, copying parameters);
• RS485 connector (Modbus RTU protocol).

Algorithms for controlling a DC electric motor:

• open-loop electric motor speed control (calculated based on voltage and field feedback);
• control of an electric machine in a closed circuit using signals from a tachogenerator, an encoder (incremental, absolute), a SinCos sensor …

List of standard functions implemented in the drive: PID controller, motorized potentiometer, digital lock (slave controlled by master encoder)...

Built-in types of electronic equipment protection: current overload, thyristor overheating, supply phase circuit breakage, armature circuit breakage, excitation field circuit breakage, feedback sensor circuit breakage. To reduce the negative effects on the supply network and parallel connected equipment, network chokes and reactors are supplied.

Areas of application: metallurgy, food processing, cable industry, machine tool construction, instrument making, pulp and paper industry, lifting and transport equipment, mining, rubber industry.

Registered number /article of electrical equipment It includes information about the nominal value of the long-term output current of the motor armature power supply circuit, the nominal voltage of the supply network and the design.

Rules for the formation of a registered number Mentor MP series DC drive

• Electric drive Mentor MP 1200A 4 R
• Mentop MP - Mentor Platform Product Family;
• 1200A is the nominal value of the long-term output current of the armature circuit in Amperes;
• Nominal voltage of the supply network: 4 – 480V, 5 – 575V, 6 – 690V;
• The design of the electric drive: R – 4-quadrant (reversible), _ – 2-quadrant (non-reversible).

The value of the rated long-term current of the Mentor MP electric drive is indicated under normal operating conditions (ambient temperature 40 °C, altitude 1000 m above sea level), under more severe operating conditions it is recommended to reduce the load rating. Graphs of the decrease in the nominal values of the electrical parameters of the Mentor MP DC electric drive with an increase in temperature are shown at the bottom of this article. Mentor MP electronic speed controllers can be connected to the supply network with a voltage of up to 480V, up to 575V, up to 690V with a frequency of 50Hz.

The value of the excitation circuit current of the built-in field controller:

• dimensions 1A, 1B (from Mentor MP25A4R to MP210A4R): 8A;
• габарит 2A, 2B, 2C, 2D (от Mentor MP350A4R до MP1850A4R): 20А

Example of the nameplate (nameplate) of an electronic speed controller

1 – model of an automatic speed control device for a DC electric machine; 
2 – rated power of the electric drive in kW and hp.; 
3 – the values of the supply voltage, the industrial frequency of the supply network, the rated current of the input circuit of the electronics; 
4 – nominal values of voltage and current of the output excitation circuit; 
5 – nominal values of voltage and current of the input power circuit (power supply circuit); 
6 – nominal values of the voltage and current of the output power circuit (anchor circuit), the value of the overload mode; 
7 – code of the manufacturer of electrical equipment of the company Lero-Somer /Control Techniques; 
8 – the factory number of the equipment; 
9 – information on compliance with international standards.

Nominal parameters of the converters at an input voltage of 400 V

In in is the rated input current of the electric drive power supply circuit, In out is the rated output current of the anchor circuit, Imax out is the maximum output current of the anchor circuit, Pn is the rated power of the electric motor, Iexc is the rated current of the field controller.

Nominal parameters of the converters at a voltage of 575 V

In in is the rated input current of the electric drive power supply circuit, In out is the rated output current of the anchor circuit, Imax out is the maximum output current of the anchor circuit, Pn is the rated power of the electric motor, Iexc is the rated current of the field controller.

Nominal parameters of the converters at a voltage of 690 V

In in is the rated input current of the electric drive power supply circuit, In out is the rated output current of the anchor circuit, Imax out is the maximum output current of the anchor circuit, Pn is the rated power of the electric motor, Iexc is the rated current of the field controller.

Graph of the time dependence of the maximum permissible output current of the electric drive during overloads

Note: 150% overcurrent for 30 seconds can be repeated up to 10 times per hour under normal conditions.