Huichuan frequency converter MD290

1. Speed start

· When starting a rotating motor, the frequency converter can automatically perform frequency search until a frequency that matches the real-time rotation speed of the motor is found. At this time, the frequency converter outputs the corresponding frequency and controls the motor to rotate to the target set frequency;

· The high-speed start function through speed tracking can avoid overcurrent faults caused by direct start and achieve smooth start;

· Can reduce the impact of momentary power outages on production;

· It can reduce the impact on the power grid.

· Realize closed-loop control of output voltage through voltage flux vector algorithm;

· When the motor torque requirement is low, reduce the excitation current according to the load current;

· Improve motor efficiency;

· Reduce motor losses and minimize energy losses.

· Temperature, pressure, and flow control operation can be achieved without the need for external regulators such as temperature regulators. （※Due to different characteristics of electric motors, the effects also vary

5. Instantly stop without stopping

· This function means that the frequency converter will not stop during an instantaneous power outage. In the event of a sudden power outage or voltage drop, the frequency converter reduces its output frequency and compensates for the voltage drop by feeding back energy through the load, in order to maintain the short-term operation of the frequency converter.

6. Overexcitation function

· No need to add accessories such as peripheral braking resistors to achieve fast braking effect and improve product usability;

· It can effectively suppress the rise of bus voltage during deceleration, avoid frequent overvoltage faults, and achieve rapid braking to meet the requirements of power outage and quick parking.

7. SupportInoDriverShopBackend software

· Rich backend monitoring functions, convenient for on-site data collection and debugging;

· Support online oscilloscope function;

· Support batch upload and download of parameters;

· Can achieveDI/DO、AI/AOLogical function selection settings and curve linear relationship settings;

· Real time display capabilityU0Group parameter function, with monitoring and diagnostic functions,Capable of automatically generating debugging documentation records.

Huichuan frequency converter MD290 series with external dimensions below 200P


Huichuan frequency converter MD290 series with external dimensions of 200G or more



Huichuan frequency converter MD290 series with external dimensions of 220P or above

· Based on the control of constant magnetic flux in the motor, vector decoupling is applied to the line voltage output to the motor end to achieve internal closed-loop control of the motor voltage, ensuring low-speed and heavy-duty starting effects.

· High accuracy of self-tuning motor parameters and easy-to-use functionality;

· Adaptive motor load characteristics, achieving smooth loading, fast current response during acceleration, and fast dynamic response during load changes;

· Accurate tuning of motor parameters for long-distance power cables under load conditions can be achieved, simplifying the debugging process;

· Can automatically suppress the phenomenon of motor current oscillation and reduce the negative impact of motor end shaft current;

· Implement multiple flexible voltage and frequency curve modes for operation.

· Steady speed accuracy:±1%；

· Speed range:1：100.

2. Multi point voltage and magnetic flux setting

· Three ways to set curves:

Linear curves are suitable for ordinary constant torque loads;

Multi point curves are suitable for dehydrator and centrifuge loads;

Square curves are suitable for loads such as fans and pumps;

· The curve can be adjusted at three points;

Suitable curves can be set according to the torque characteristics of the equipment;

· selectGType andPLoad curve standard of type in one mode:

· GType correspondence300sWithin the cycle period150%Continuous load60s；

· PType correspondence300sWithin the cycle period130%Continuous load60s.

4 EMCDesign specification improvement

· EMCBuilt in a set of safety capacitors, optional external capacitor set, simple filter, optional Schaffner filter can reachC2Standard;

· Adopting a dedicated grounding pile design to facilitate grounding and mitigate electromagnetic interference;

· Provided on actual harsh application sitesEMCThe complete configuration scheme of filters, common mode suppressors, and simple filters is optimizedEMCElectrical environment of on-site equipment.
Note: Optional filters can meet the requirementsCECertification, ReachC2classEMCStandard, recommend Schaffner（SCHAFFNER）And perseverance（JIANLI）Model number.

· Under the new hardware technology platform, rectifier bridges andIGBTHigher configuration, large surplus and reduced rating design;

· Compared to beforeMD280Compared to the same power, the product series has reduced its external volume by more than half;

· Save installation space and facilitate the layout of electronic control components.

6. Built in DC reactor
30kWThe above series comes standard with built-inHThe insulation grade DC reactor can effectively improve the input power factor of the frequency converter, enhance the overall efficiency and thermal stability, effectively eliminate high-order harmonics and external conducted radiation interference, and eliminate safety hazards and the problem of occupying electrical installation space caused by external DC reactors.
remarks:18.5G/22P~22G/30PBuilt in optional configurations.

7. A comprehensive braking circuit scheme

· MD290T18.5G/22P(B)~MD290T75G/90P(B)Optional built-in braking unit;

· Strong braking ability: short-term braking ability can reach1.1~1.4Doubling the rated power of the frequency converter;

· More comprehensive and intelligent braking protection: equipped with braking resistor short-circuit protection; Brake circuit overcurrent protection; Overload protection for brake pipes; Brake pipe direct inspection, etc.