-
E-mail
3352272736@qq.com
-
Phone
13397510093
-
Address
Hunan
Product Categories
Hunan Fuxinyu Intelligent Technology Co., Ltd. (authorized agent of Siemens)
Siemens MM420 frequency converter agent merchant
NegotiableUpdate on 01/22
- Model
- Nature of the Manufacturer
- Producers
- Product Category
- Place of Origin
Overview
The Siemens MM420 frequency converter adopts high-performance vector control technology, providing low-speed high torque output and good dynamic characteristics, while also having * overload capacity to meet a wide range of application scenarios.
Product Details
The Siemens MM420 frequency converter is a new generation of multifunctional standard frequency converter that can be widely used.
It adopts high-performance vector control technology, providing low-speed high torque output and good dynamic characteristics, while possessing * overload capacity to meet a wide range of application scenarios. The innovative BiCo (internal functional interconnection) feature has * flexibility.
Main features:
200V-240V ± 10%, single-phase/three-phase, AC, 0.12kW-45kW; 380V-480V ± 10%, three-phase, AC, 0.37kW-250kW;
Vector control method can form closed-loop vector control and closed-loop torque control;
High overload capacity, built-in braking unit;
Three sets of parameter switching function. Control functions: linear v/f control, square v/f control, programmable multi-point setting v/f control, flux current control without speed measurement vector control, closed-loop vector control
Control, closed-loop torque control, energy-saving control mode;
Standard parameter structure, standard debugging software;
6 digital inputs, 2 analog inputs, 2 analog outputs, and 3 relay outputs;
Independent I/O terminal board for easy maintenance;
Using BiCo technology to achieve free connection of I/O ports;
Built in PID controller, parameter self-tuning;
Integrated RS485 communication interface, optional PROFIBUS-DP/Device Net communication module;
Has 15 fixed frequencies, 4 jump frequencies, programmable;
Capable of implementing master/slave control and torque control modes;
It has the function of 'automatic restart' when the power supply disappears or malfunctions;
A flexible ramp function generator with smooth starting and ending segments;
Fast current limiting (FCL) to prevent unnecessary tripping during operation;
There are DC braking and composite braking methods to improve braking performance.
Protection function:
Overload capacity of 200% rated load current for 3 seconds and 150% rated load current for 60 seconds;
Overvoltage and undervoltage protection;
Inverter and motor overheat protection;
Ground fault protection, short circuit protection;
Locking motor protection to prevent stall protection;
Implement parameter linkage using PIN numbers.
Parameter Settings
The frequency converter has multiple set parameters, each with a certain selection range. In use, it is common to encounter the phenomenon of the frequency converter not working properly due to improper setting of individual parameters.
Control methods: speed control, torque control, PID control, or other methods. After adopting the control method, static or dynamic identification is generally required based on the control accuracy.
Low operating frequency: refers to the low speed at which the motor operates. When the motor operates at low speeds, its heat dissipation performance is poor, and prolonged operation at low speeds can cause the motor to burn out. Moreover, at low speeds, the current in the cable will also increase, which can cause the cable to heat up.
High operating frequency: Generally, frequency converters operate at high frequencies up to 60Hz, and some even up to 400Hz. High frequencies will cause the motor to run at high speeds. For ordinary motors, their bearings cannot operate at their rated speed for a long time. Can the rotor of the motor withstand such centrifugal force.
Carrier frequency: The higher the carrier frequency is set, the larger the high-order harmonic components, which is closely related to factors such as cable length, motor heating, cable heating, and frequency converter heating.
Motor parameters: The frequency converter sets the power, current, voltage, speed, and high frequency of the motor in the parameters, which can be directly obtained from the motor nameplate.
Frequency hopping: At a certain frequency point, resonance may occur, especially when the entire device is relatively high; When controlling the compressor, avoid the surge point of the compressor.
