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Liquid Resistance Speed Control Cabinet: Efficient and Smooth Motor Speed Control Solution

fluidsResistance speed control cabinet: Efficient and smooth motor speed control solutions

In the field of industrial motor control, liquid resistance speed control cabinet has become the ideal choice for speed control and soft starting of large and medium-sized wire-wound asynchronous motors with its unique technical advantages and reliable performance.

Liquid resistance speed control cabinet (also known as liquid resistance)starter cabinet(or water resistance cabinet) is a type of water resistance cabinet that employsaqueous electrolyte solutionSpeed control devices as conductive media. It is realized by changing the resistance value of the liquid resistor strung in the rotor circuit of the motor.Large and medium winding asynchronous motorsSoft start and speed controlWidely used inBuilding materials, metallurgy, mining, petroleum, chemical industryand other industrial sectors。

I. Working principle and technical characteristics

1. Intelligent working principle

The liquid resistance speed control cabinet is based onPrinciple of conductivity of aqueous electrolyte solutions(of a machine) operate. The resistance between the two electrodes is changed by varying the distance between the two electrodes in the aqueous electrolyte solution, or by adjusting the concentration of the electrolyte solution。

For fan and pump loads, the unit is designed according to theThe relationship between P ∝ n³(P is the output shaft power, n is the rotational speed), by changing the resistance value of the liquid resistance strung on the motor rotor to change the motor speed, so as to achieve the purpose of speed regulation, energy saving. For motors used in rolling mills in the metallurgical industry, by changing the resistance value of the liquid resistor, it can effectivelySuppresses the inrush current of the motor at the moment of the start of zappingThe purpose is to protect the motor.。

2. Technical excellence features

Smooth stepless speed regulation: Smooth starting of the main motor by changing the concentration of the solution or by steplessly adjusting the resistance value within the range.
Large thermal capacity design: Liquid resistors have a large thermal capacity and can be started continuously for 5 to 10 times.
Low starting current: The ratio of starting current to rated current is satisfactory at ≤1.3.Small starting current: Iq≤1.3Ie (A)
Low voltage starting capability: Smooth starting when the grid voltage is lower than 10% of the motor's rated voltage.
Rugged constructionResistance box adopts high-temperature resistant material, which can withstand high temperature of 160℃ without deformation, and its service life can reach more than 20 years.

II. Core structure and component design

Liquid resistance speed control cabinet mainly consists ofLiquid Variable Resistors, Plate Type High Efficiency Heat Exchangers and Electronic Control Systemsmake up。

1. Cabinet structure

The cabinet frame consists ofProfile WeldingThe internal and external surfaces are made ofspray-plasticizedThe product is highly resistant to heat and humidity, and corrosion.The Protection class up toIP20 or IP30It can also be customized with higher protection level according to the requirements. Cabinet design is reasonable, firm, beautiful, and has good sealing and dustproof performance.。

2. Conducting electrodes

Conductive plates (including dynamic and static plates) are made ofRare metal plating on the surface of purple copper platetechnology, with non-oxidizing, non-corrosive, maintenance-free characteristics, to achieve the purpose of long-term reliable use. The poles are insulated from each other by means of an insulating device to ensure the safe operation of the equipment.。

3. Liquid resistance systems

Liquid resistance box usingpolymer polytetrafluoroethyleneWelding of high-temperature-resistant plastic sheets. The box is equipped with an electronic device made ofSodium carbonate aqueous solutionComposition of the electrolyteIt has good electrical conductivity and heat capacity. Each tank is fixed with static pole plate at the bottom, and the static pole plate leads to the terminal using high-voltage heat-shrinkable insulating sleeve, which ensures reliable insulation between the poles.。

4. Electrical control systems

The electrical control part is centrally placed in the electrical control unit box inside the cabinet to realize theControl, multiple protections, display of operating conditions, and operating and actuating functions. Optional Configurationhuman-machine interface (HMI) systemsIt realizes remote monitoring and operation with human-machine dialogue function, simple operation and high reliability.。

Third, the performance characteristics and advantages

1. Energy efficient performance

Liquid resistance speed control cabinet in the fan, pump load applications, operating power saving rate up to10-30%. Through smooth starting and speed control, it can significantlyReduced energy consumption, improve the efficiency of equipment operation.

2. Excellent starting performance

Smooth startingNo mechanical stress on the equipment, which can prolong the life of mechanical equipment and motors.
Low starting current: Starting current less than 1.3 times the rated motor current
High starting success rate: Unaffected by grid voltage fluctuations and load variations, ensuring a successful start.

3. Reliable protection functions

The device hasMultiple protection functions such as start-up timeout, overpressure, over-travel, over-temperature, etc.to ensure the safe operation of the equipment under various operating conditions. To the power gridno harmonic pollutionHigh power factor, mill type load COS¢ can be increased by 0.18 to 0.22 (compared with series reactor).。

IV. Application areas and scenarios

Liquid resistance speed control cabinets are widely used in the following areas:

1. Heavy industry

Building materials industry: Cement plant ball mills, crushers, fans and other equipment
Metallurgical industry: Equipment such as mills, compressors, fans, etc.
Mining industry: Elevators, crushers, conveyors and other heavy equipment

2. Energy and infrastructure industries

petrochemicals: Various types of pumps, compressors and other equipment
Power industry: Boiler feed pumps, supply fans, induced draft fans and other auxiliary equipment

3. Range of applicable motors

Liquid resistance speed control cabinet is suitable for rated voltage380V-10kVThe power ranges from75kW to 10,000kWThe heavy load smooth soft start of wound asynchronous motors in all industries, especially suitable forLarge inertia loads和Heavy duty startingsituation。

V. Technical parameters and specifications

Main technical parameters

parameter category	technical specification
Applicable Voltage	380V-10kV
power range	75-10000kW
Starting current	≤1.3 times rated current
speed ratio	Fan and pump loads are approximately 2:1
power saving ratio	Fans, pumps load about 10-30%
Electrohydraulic working temperature	5～60℃
protection class	IP20, IP30
environmental temperature	-40℃~+50℃

VI. Selection and Installation Guide

1. Selection considerations

When selecting a liquid resistance speed control cabinet, users are required to provide the following technical information：

Main parameters of the main motor:Rated power, stator voltage/current, rotor voltage/current等
Load Characteristics: Load type (fans, pumps, mills, etc.),inertia (mechanics)
Use of environmental conditions: ambient temperature, humidity, altitude, etc.
Special function requirements: whether remote monitoring, automatic control and other functions are required

2. Installation environmental requirements

In order to ensure the normal operation of the liquid resistance speed control cabinet, the installation environment should meet the following requirements：

environmental temperature: -40℃~+50℃
Relative air humidityNot to exceed 90%
altitudeNot exceeding 2000m (special design can be made according to specific working conditions if the altitude is above 2000m)
slopeNot more than 5°
installation locationNo fire, explosion hazards, chemical corrosion or strenuous exercise

VII. Maintenance and Troubleshooting

The maintenance of the liquid resistance speed control cabinet is relatively simple and focuses on the following aspects:

1. Periodic inspection and maintenance

Electrolyte examination: Regularly check fluid levels and electrolyte concentrations to ensure they are within normal limits
Polar Plate Inspection: Check pole plates for corrosion or scale buildup and clean if necessary
Insulation Testing: Regular testing of insulation resistance to ensure safe operation of equipment

2. Common Troubleshooting

Abnormal resistance value: It is possible that the electrolyte concentration is not correct or the pole plate is not positioned correctly.
overheating: Check that the cooling system is working properly and that the ambient temperature is not too high
Reduced starting performance: Check whether the electrolyte needs to be replaced or adjusted

Liquid resistance speed control cabinet with itsSmooth starting characteristics、Reliable operational performance和Significant energy savingsThe newest version of the product has been developed for the control of large and medium-sized wire-wound asynchronous motors. ItsSimple structure and easy maintenanceThe characteristics of theBuilding materials, metallurgy, mining, petroleum, chemical industryWidely used in industrial sectors such as。

With the continuous development of industrial technology, liquid resistance speed control cabinets will continue to be used in theIndustrial energy saving and automation controlThe field plays an important role in creating greater economic benefits for users.

Tags：Resistance speed control cabinet

Simo motorsAfter-sales service policy: quality-oriented, the user first!

Sincere, intimate, and devoted, Simo will always be attentive.

preamble

Thank you for choosing Simo Motor products. As an enterprise with many years of experience in motor manufacturing, Simo Motor always insists on “Quality oriented, customer first”For the purpose, through the perfect service system, to ensure that every customer can enjoy efficient and professional after-sales service.

Our products have been awarded the honorary titles of “High Quality Products”, “China Famous Brand Products”, “National Inspection-free Products” and “China Well-known Trademark” for many times by provinces, cities and ministries. Famous Trademark" honorary title. In order to further enhance customer experience, we have formulated this after-sales service policy, aiming to provide customers with comprehensive, fast and satisfactory service guarantee.

I. Quality Assurance Commitments

Simo Motor implements comprehensive quality control in strict accordance with international standards, national standards, machinery industry standards and enterprise standards:

All products are listed in the “GB/T 19001-2008/ISO 9001:2008 quality management system”Production is carried out under effective operation to ensure that raw materials are strictly and perfectly inspected from the time they enter the factory to the time the products leave the factory.
Commitment that all products offered areNew and unusedand meets the quality requirements specified in the user's contract.
Adhere to the quality management system in accordance with “GB/T 19001-2000 idt ISO 9001:2000 standard”, and keep the quality management system running effectively.

Second, pre-sale service content

To help customers make the best choice, Simo Motors offers comprehensive pre-sales support:

Specialized technical consulting: Receive inquiries from customers about the business and technical aspects of motors, and answer all kinds of questions from customers.
Personalized Solutions: Objectively introduce the performance and characteristics of Simo's motor products and provide customized power solutions according to customer needs.
Comprehensive product information: Provide detailed quotations, drawings and motor samples and other information to help customers fully understand the characteristics of the product.

III. Ordering instructions

To ensure that the motor meets your needs, please specify the following parameters when ordering:

Basic parameters: Motor model, rated power, rated voltage, number of poles, rated frequency
installation environment: Protection class, cooling method, mounting method, rotation direction, environmental conditions, outlet location
Conditions of use: Altitude and working temperature of the installation site, type of load of the motor

if anyspecial requirementIf you have any questions about our products, please feel free to contact us, we need to sign another technical agreement before signing the order contract. You can also directly call our customer service hotline:15902923228 Access to professional guidance.

IV. Warranty Policy Details

1. Warranty period

Simo Motors offersNot more than two years from date of shipmentThe warranty service. Within this specified time period, if the motor is damaged or fails to function properly due to poor manufacturing quality, Simo Motors willRepairing or replacing parts or motors at no cost to the user。

2. Warranty coverage

Warranty covers product quality problems caused by our company, the company will replace the relevant parts or provide free repair.
Warranty services need to be based onProper use and normal maintenanceThe machine should be used correctly in accordance with the original operating manual and maintained, lubricated and cleaned in accordance with the original manufacturer's recommendations.

3. Non-warranty coverage

The following are not covered by the warranty:

由Non-designated maintenance staffDamage caused
Unauthorized modifications or self-disassembly
utilizationUnofficial spare parts or software
Failure to comply with operating manualsPrescribed guidelines for use, handling and maintenance
因natural disaster（Damage to products caused by wind, fire, flood, earthquake, etc.
Natural wear and tear under normal use

V. Post-warranty services

After the expiration of the warranty period, Simo motors provide continuous service support:

Reimbursable services for life: After the expiration of the warranty period, if the product malfunctions, our company implements lifelong paid service, the required wearing parts and spare parts toCost price supply。
(pay a) regular return visit: After-sales service staffFrom time to time, we will make return visits to the usersUnderstand the status of product usage and resolve potential issues in a timely manner.
Professional Repair ServiceThe company undertakes the repair of all kinds of motors, regardless of whether they are under warranty or not, and can provide professional overhaul and maintenance services.

VI. Service commitments and standards

Simo Motors is committed to “Sincerity, thoughtfulness, devotion, Simo will always be attentive.”The “Three Hearts” service concept ensures customer experience through standardized service processes:

Professional Services Team: The company has set up a specialized service team to provide installation guidance, troubleshooting and maintenance services to ensure the efficient operation of the products in the process of use.
Rapid Response Mechanism: The after-sales service team will respond promptly to customer feedback and quickly develop solutions.
Full track record: Detailed records are kept for all service sessions to ensure traceability of the service process and continuous improvement of service quality.

VII. User complaint channels

If you are not satisfied with the services provided by Simo Motors, you are welcome to provide feedback through the following channels:

direct marketingComplaints from Service Department and Headquarters
Call the customer service line:15902923228

We will take every piece of feedback seriously and continue to improve the quality of our services.

concluding remarks

Simo Motors will continue to provide customers withHigh quality products and professional after-sales serviceWe will solve your worries through a perfect service system. We firmly believe that only the success of the customer, the development of Simo. Choosing Simo motor is choosingQuality and Trust。

Simo motors--Service with heart, create the future together!

Simo motorsBrand advantage: excellent quality, leading the motor industry innovation and development

More than sixty years of professional precipitation, to create a benchmark brand in the motor industry

Brand heritage and strength

Simo Motors (former)Xi'an Electric Machinery Factory) was founded in 1955, as China's motor industryleading enterprisesThe company is one of the leading manufacturers of electric motors in the world, with more than sixty years of experience and expertise in the manufacturing of electric motors. The company has now developed intoIntegration of R&D, manufacturing and sales of motor productsOur products are widely used in many important fields such as electric power, coal, petroleum, mining, metallurgy, railroad, transportation, chemical industry, agriculture, water conservancy, aviation and so on.

Simo motors are recognized for theirDeep technical heritage和Continuous spirit of innovationThe company has established an excellent brand image in the motor industry, and its products are exported to more than 40 countries and regions such as North America, Europe, the Middle East, Southeast Asia, Africa, Australia, etc., which are trusted and highly praised by users all over the world.

Core Technology Advantage

1. Leading research and development innovation capabilities

Simo Electric always takes technological innovation as the core driving force of enterprise development:

Professional R&D Team: Has a team ofSenior engineers and technologistsThe R&D team, which is composed of a team of researchers, focuses on the cutting-edge research and application development of motor technology.
Continuous technical investment: invest an annual percentage of sales5%-7% As R&D funding to ensure continuous technological innovation and product upgrades
Patented Technology Achievements: Cumulative access toMore than a hundred national patentsA number of products have won national and provincial awards for scientific and technological progress.
Industry-University-Research Cooperation: Establishing strategic cooperative relationships with many well-known universities and scientific research institutions to jointly promote the development of motor technology.

2. Excellent product quality system

Simo Motors has established a comprehensive quality assurance system to ensure that every motor meets the highest quality standards:

International Standard Certification: Fully adoptedISO9001 Quality Management System Certification、ISO14001 Environmental Management System Certification和OHSAS18001 Occupational Health and Safety Management System Certification
Strict quality control: Implementation from raw material procurement to finished product shipment68 strict quality control proceduresEnsure zero defects in products
Advanced testing equipment: Equipped with international advancedMotor Performance Test System、Vibration Analyzer、Noise test equipmentetc., comprehensive testing of various performance indicators of the motor
Continuous Quality Improvement: Establish a perfect quality feedback mechanism, continuously optimize the production process, and improve product quality and stability.

Product Advantage Characteristics

1. Energy efficient technologies

Simo Motors actively responds to the national energy-saving and emission reduction policy and launches a series of energy-efficient products:

High Efficiency Motor Series: To meet the nationalGB18613-2020 standardEnergy efficiency rating, some products reachIE4, IE5 ultra-high efficiency level
Application of energy-saving technologies: AdoptionHigh Quality Silicon Steel Sheet、Low loss bearings、High efficiency cooling systemetc., significantly reducing operational energy consumption
Intelligent control technology: Supporting the advancedFrequency control systemThe optimal control of the motor operating state is realized, and the energy-saving effect is improved 15%-30%

2. Excellent performance

Simo Motor products are characterized byHigh reliability, long service life, low maintenance costsAnd famous:

Powerful power output: Optimized electromagnetic design solutions to ensure that the motorHigh starting torque and high overload capacity
Low vibration and low noise: AdoptionDynamic balancing process和noise reduction technologyThe vibration and noise values are better than the national standards.
Highly adaptable to the environmentProduct design takes into account all kinds of severe working conditions, withResistant to high temperature, humidity and corrosionand other properties
Long life design: The key components are made of special treatment and high quality materials, and are designed to last up to100,000 hoursthat amount or more

3. Complete product range

Simo Motors offers a comprehensive range of products to meet the needs of different customers:

High voltage motorsrange: Voltage level coverage6kV, 10kVMultiple ratings, power range200-10000kW
Low Voltage Motor Series:: IncludesYX3, YE3, YE4and other series, power range0.55-1000kW
Explosion-proof motorsrange: ByNational explosion-proof certificationFor use in flammable and explosive hazardous areas
Specialized motor series: Developed for specific industry needsSpecialized for coal mine, metallurgy, and shipsSpecialty motors
Non-standard customization capability: Strong customization and development capability, according to the customer's needsPersonalized Solutions

Service System Advantage

Simo Motor has established a comprehensive customer service system:

pre-sales technical support: Provide professional selection guidance, program design and product demonstration
Intimate service during the sale: Strict contractual performance, ensuring on-time delivery and providing installation guidance
Comprehensive after-sales protection：24 months warranty，7×24 hours technical support，48-hour on-site servicepromise
Lifetime maintenance support: Establish customer equipment files and provide full life-cycle service support

Industry Application Advantages

Simo motors have accumulated a wealth of application experience in a number of key industries:

Power industry: Provide supporting motors for thermal power, hydropower and nuclear power, with stable and reliable operation.
coal industry: Explosion-proof motor products passed the coal mine safety certification, safety recognized by the industry
petrochemicalsCorrosion-resistant, explosion-proof special motors to adapt to the harsh working conditions and ensure safe production.
Metallurgical industry: High overload capacity, high temperature resistant motors to meet the special needs of metallurgical equipment
Transportation: Specialized motor solutions for railroads, rail transit, ports, etc.

Brand Honors and Certifications

Simo motors have won many honors for their excellent product quality and good market performance:

China Famous Brand Products、National Inspection-free Products、China Famous Trademarks
High-tech enterprises、Provincial Enterprise Technology Center
A number of products won the provincial and ministerial-level scientific and technological progress awards
Contract and Trustworthy Enterprise、Quality and reputation AAA grade enterprise

concluding remarks

Choosing Simo motors is choosingReliable quality assurance、Leading Technical Strength和Complete service supportSimo Motors is a leading manufacturer of electric motors in China. With more than sixty years of professional accumulation, Simo motors have a profound technical background and rich industry experience, and are able to provide customers in various industries with the best quality motor products and perfect power solutions.

In the future, Simo Motor will continue to uphold the "Quality-oriented, innovation-driven, customer first"business philosophy, and constantly improve the level of product technology and quality level, to create greater value for customers, and make greater contributions to the development of China's motor industry.

Simo motors - strong power, excellent energy efficiency and perfect service!