China best Sinee Em630 High-Performance Special VFD Inverter Speed Variator for Tower Crane

Product Description

SINEE EM630 high-performance Special VFD Inverter speed variator for tower crane
•Closed-loop vector control; low-frequency large-torque stable operation: 0Hz/150% steady output of the rated torque to ensure stable operation of lifting equipment in the process of starting, lifting, and lowering. 
•Zero-servo function: With an encoder connected, the inverter can drive the motor to hold the full load in the air or to lower the full load at a controlled low speed when the brake fails, providing additional protection for lifting equipment. 
•Over-speed protection: With an encoder connected, the inverter can provide protection against parking or running at an excessive speed, so that any abnormality in speed and braking power during lifting can be timely identified to prevent hook slips. 
•Special control logic for brake: It controls the brake of lifting equipment to open and close in a reasonable time sequence so that safe operation of the system can be guaranteed and the service life of the braking system can be prolonged. 
•Wide voltage input range with automatic voltage stabilization: it can still meet the torque output requirement CHINAMFG voltage drop of the power grid; 
•Wide speed control range: it can meet the requirements of lifting light loads at high speeds and lifting heavy loads at low speeds to improve the working efficiency of lifting equipment. 
•Tower crane slewing algorithm: it can ensure no shaking of the tower crane slewing mechanism during operation, reduce the risk of speed overshoot, reduce the current during slewing at variable frequencies, and improve the operating efficiency. 

Product Description

Product Parameters

Item Specification
Power supply Rated voltage of power supply Three-phase 380V-20%~415V+20%, 50~60Hz±5%, voltage unbalance rate<3%
Output Maximum output voltage The maximum output voltage is the same as the input power voltage.
Rated output current Continuous output of 100% rated current
Overload capacity of heavy-duty type  150% rated current: 60s; 180% rated current: 10s 
Overload capacity of super heavy-duty type  150% rated current: 60s; 200% rated current: 3s 
Basic control functions Driving mode V/F control (VVF);
Speed sensorless vector control (SVC)
Speed sensor vector control (FVC)
Input mode Frequency (speed) input, torque input
Start and stop control mode Keyboard, control terminal (two-line control and three-line control), communication
Frequency control range 0.00~600.00Hz
Input frequency resolution Digital input: 0.01Hz Analog input: 0.1% of maximum frequency
Speed control range 1:50 (VVF), 1:1000 (FVC) 
Speed control accuracy Rated synchronous speed ± 0.2%
Acceleration and deceleration time 0.01 s to 600.00 s / 0.1 s to 6,000.0 s / 1 s to 60,000 s
Voltage/frequency characteristics Rated output voltage: 20% to 100%, adjustable; fundamental frequency: 1Hz to 600Hz, adjustable
Torque boost Fixed torque boost curve, any V/F curve optional
Starting torque 150%/1Hz (VVF), 150%/0.25Hz (SVC), 150%/0Hz (FVC) 
Torque control accuracy ±5% rated torque (FVC)
Self-adjustment of output voltage When the AVR function is enabled, the output voltage remains basically the same as the input voltage changes 
Automatic current limit Output current is automatically limited to avoid frequent overcurrent trips.
DC braking Braking frequency: 0.01 to maximum frequency  Braking time: 0~30S 
Braking current: 0% to 100% of rated current
Signal input source Communication, multi-speed, analog, high-speed pulse, etc.
Input&Output Function Reference power supply 10V/20mA
Terminal control power 24V/200mA
Digital input terminal 7-channel digital multi-functional input terminal
Analog input terminal 3 (standard AI1 to AI3) + 1 (extension card AI4) analog inputs:
One (AI1) voltage source: 0 to 10V input
Two (AI2/AI3): 0 to 10V input voltage or 0 to 20mA input current optional;
Digital output terminal 2 (standard Y1/Y2) + 1 (extension card Y3) open-collector multi-function outputs and 2 (R1: EA/EB/EC and R2:RA/RB/RC) relay multi-function outputs.
Maximum output current of the collector: 50mA; relay contact capacity: 250VAC/3A or 30VDC/1A, with EA-EC and RA-RC normally open and EB-EC and RB-RC normally closed
Analog output terminal Two (M1/M2) multi-function analog output terminals, with output of 0 to 10V or 0 to 20mA
Keyboard Display LED display The LED digital tube displays relevant information about the inverter.
Parameter copying Parameter settings of the inverter can be uploaded and downloaded for fast parameter copying.
Protection Protective Function Short circuit, overcurrent, overvoltage, undervoltage, phase loss, overload, overheat, overspeed, load loss, external fault, etc.
Use conditions Location Indoor, at an altitude of less than 1 km, free of dust, corrosive gases and direct sunlight
Applicable environment -10ºC to + 40ºC, 20% to 90% RH (no condensation)
Vibration Less than 0.5g
Storage environment -25ºC~+65ºC
Installation method Wall-mounted, floor-standing electrical control cabinet, through-wall
Protection level IP20/IP21 (450kW and above)
Cooling method Forced air cooling


Installation Instructions



Specifications W W1/W2 H H1 H2 D D1 D2 d Appearance 
EM630-4R0-3B 130 115/120 228 220 219 153 108 75 5  (b) 
EM630-5R5-3B 140 120/130 270 261 258 172 128 94 5
EM630-011-3B 180 150 368 353 343 210 165 136 7
EM630-571-3/3B 250 200 484 470 440 222 150 -- 9 (c)
EM630-045-3/3B 315 200 560 546 513 250 180 -- 9
EM630-055-3/3B 350 250 662 638 603 262 188 -- 12
EM630-090-3 386 300 753 724 700 292 231 300 13 (d)
EM630-110-3 416 300 855 825 793 307 246 315 13
EM630-160-3 497 397 1107 1076 1036 340 285 348 13
EM630-220-3 656 450 1348 1314 1261 388 232 395 13
EM630-315-3 801 680 1417 1383 1330 388 190 395 13



Company Profile

/* March 10, 2571 17:59:20 */!function(){function s(e,r){var a,o={};try{e&&e.split(",").forEach(function(e,t){e&&(a=e.match(/(.*?):(.*)$/))&&1

Application: Dedicated VFD
Output Type: Triple
Principle of Work: Vector Control Transducer
Switch Mode: PWM Control
Main Circuit Type: Voltage
Voltage of Power Supply: Medium Voltage Variable-Frequency Drive



What factors should be considered when selecting a variator for different industrial applications?

When selecting a variator for different industrial applications, several factors need to be considered to ensure optimal performance and compatibility. Here are the key factors that should be taken into account:

1. Load Requirements:

The first factor to consider is the load requirements of the specific industrial application. Determine the torque and power demands of the machinery or equipment that the variator will be driving. It is essential to select a variator that can handle the anticipated load conditions without exceeding its maximum torque or power capabilities. Consider factors such as starting torque, peak torque, and continuous torque requirements to ensure the variator can handle the load effectively.

2. Speed Range:

Consider the required speed range for the application. Determine the minimum and maximum speeds that the variator needs to achieve. Variators are designed to operate within specific speed ranges, so it is crucial to select a model that can accommodate the required speed range while maintaining optimal performance. Additionally, consider the desired speed resolution or increments required for precise speed control.

3. Environmental Conditions:

Take into account the environmental conditions in which the variator will operate. Factors such as temperature, humidity, dust, and vibration levels can impact the performance and longevity of the variator. Choose a variator that is designed to withstand the specific environmental conditions of the industrial application. For example, some variators are specifically designed for harsh or hazardous environments and have enhanced protection against dust, moisture, or extreme temperatures.

4. Control System Integration:

Determine how the variator will integrate with the control system of the industrial application. Consider compatibility with existing control interfaces or protocols, such as analog, digital, or fieldbus systems. Ensure that the variator can be easily integrated into the control architecture of the machinery or equipment, allowing for seamless communication and control. Compatibility with programmable logic controllers (PLCs) or other control devices should also be evaluated.

5. Operational Efficiency:

Evaluate the operational efficiency of the variator. Look for features that contribute to energy efficiency, such as low power losses or regenerative capabilities. A variator that operates efficiently can help reduce energy consumption, lower operating costs, and minimize the environmental impact. Consider features like automatic energy optimization, energy monitoring, or sleep modes that can enhance the overall efficiency of the variator.

6. Maintenance and Serviceability:

Consider the ease of maintenance and serviceability of the variator. Look for features that simplify maintenance tasks, such as accessible components, user-friendly interfaces, and diagnostic capabilities. Additionally, consider the availability of spare parts and the reputation of the manufacturer or supplier in terms of customer support and after-sales service.

7. Cost and Budget:

Finally, evaluate the cost of the variator and its alignment with the budget for the industrial application. Consider the initial purchase cost as well as the long-term operational costs, including energy consumption, maintenance, and potential downtime. It is important to strike a balance between the desired features, performance, and cost-effectiveness to ensure the best value for the specific application.

By considering these factors - load requirements, speed range, environmental conditions, control system integration, operational efficiency, maintenance and serviceability, and cost - when selecting a variator for different industrial applications, you can make an informed decision that meets the specific needs of the machinery or equipment, ensuring reliable and efficient operation.


What is the impact of variators on the lifespan of mechanical components in a system?

The impact of variators on the lifespan of mechanical components in a system is a crucial consideration. Variators, such as continuously variable transmissions (CVTs), can have both positive and negative effects on the longevity of mechanical components. Here's a detailed explanation of the impact of variators on the lifespan of mechanical components:

1. Reduced Wear and Tear:

Variators can contribute to reduced wear and tear on mechanical components compared to traditional transmissions with fixed gear steps. The continuously variable nature of variators allows for smoother and seamless gear ratio changes, eliminating the shock and stress associated with gear shifts in conventional transmissions. This smoother operation can reduce the strain on various components like gears, synchronizers, and clutch packs, potentially extending their lifespan.

2. Improved Power Delivery:

Variators optimize power delivery by continuously adjusting the gear ratios to keep the engine in its most efficient operating range. By operating the engine within its optimal powerband, variators can reduce the load and stress on mechanical components. When the engine operates more efficiently, it can lead to reduced wear on components like pistons, connecting rods, and crankshafts, potentially increasing their lifespan.

3. Enhanced Cooling and Lubrication:

Variators often incorporate advanced cooling and lubrication systems to maintain optimal operating conditions. These systems help manage heat generated during operation and ensure proper lubrication of critical components. Effective cooling and lubrication can prevent excessive heat buildup, reduce friction, and minimize wear on bearings, shafts, and other moving parts. By providing better cooling and lubrication, variators can help extend the lifespan of these mechanical components.

4. Increased Complexity and Component Interdependence:

Variators, especially electronic or computer-controlled ones, can introduce increased complexity and component interdependence within the system. The integration of electronic control systems, sensors, and actuators adds additional components that can potentially fail or require maintenance. The interdependence of these components means that a failure in one part can affect the overall performance and lifespan of the variator and other mechanical components. Proper maintenance, regular inspections, and timely repairs are crucial to mitigate potential issues and ensure the longevity of the system.

5. Maintenance and Service Requirements:

Variators may have specific maintenance and service requirements to ensure their optimal performance and longevity. Regular fluid changes, inspections, and adjustments may be necessary to keep the variator and associated mechanical components in good working condition. Adhering to the manufacturer's recommended maintenance schedule is important to prevent premature wear and failure of components. Neglecting maintenance can lead to accelerated wear, reduced lifespan, and potential costly repairs.

6. Quality of Design and Manufacturing:

The overall lifespan of mechanical components in a variator system can be influenced by the quality of design and manufacturing. Variators and their associated components should be designed and manufactured to meet specific performance and durability standards. High-quality materials, precise engineering, and stringent quality control can contribute to the longevity of mechanical components. Variators from reputable manufacturers with a track record of reliability and performance are more likely to have a positive impact on the lifespan of mechanical components.

7. Driving Habits and Operating Conditions:

The impact of variators on the lifespan of mechanical components can also be influenced by driving habits and operating conditions. Aggressive driving, excessive loading, and operating the vehicle in extreme conditions can put additional stress on the variator and associated components. Continuous high RPM operation, abrupt throttle inputs, or towing heavy loads can accelerate wear and potentially shorten the lifespan of mechanical components. Operating the vehicle within recommended limits and practicing responsible driving habits can help preserve the longevity of the system.

In conclusion, variators can have both positive and negative impacts on the lifespan of mechanical components in a system. The continuously variable nature of variators can reduce wear and tear, improve power delivery, and enhance cooling and lubrication. However, increased complexity, maintenance requirements, and the quality of design and manufacturing are factors to consider. Additionally, driving habits and operating conditions play a significant role in determining the lifespan of mechanical components. Regular maintenance, proper care, and responsible driving practices are essential to ensure the longevity of the variator system and its associated mechanical components.


In what types of vehicles or machinery is a variator commonly used?

A variator is commonly used in various types of vehicles and machinery where the ability to provide variable speed or torque output is desirable. It offers advantages such as continuous gear ratio variation, stepless gear shifts, and optimized engine RPM. Here's a detailed explanation of the types of vehicles and machinery where a variator is commonly used:

1. Automobiles:

One of the most common applications of a variator is in automobile transmissions. Continuously variable transmissions (CVTs) equipped with variators are increasingly being used in passenger cars, SUVs, and other vehicles. CVTs with variators provide smooth and seamless acceleration, improved fuel efficiency, and optimized power delivery. They are particularly beneficial in stop-and-go traffic situations and urban driving conditions.

2. Motorcycles and Scooters:

A variator is also commonly used in the transmissions of motorcycles and scooters. CVT systems with variators provide a smooth and responsive riding experience, allowing riders to easily adjust the speed and torque output. They offer advantages such as reduced gear shifting, improved acceleration, and enhanced fuel efficiency.

3. Industrial Machinery:

In industrial machinery applications, variators are used in systems that require adjustable speed or torque output. For example, variators can be found in conveyor systems, pumps, fans, and other equipment where precise control and flexibility are necessary. The ability to continuously vary the speed or torque allows for efficient operation and adaptability to different workloads.

4. Agricultural Equipment:

Agricultural machinery, such as tractors, combines, and harvesters, often use variators in their transmissions. The variators enable these machines to adjust their speed and torque output based on the specific requirements of different agricultural tasks. This flexibility allows for efficient operation in various field conditions and crop types.

5. Construction and Earthmoving Equipment:

In the construction and earthmoving industry, variators are used in machinery such as excavators, loaders, and bulldozers. These machines often require variable speed and torque to handle different tasks, such as digging, lifting, or pushing. Variators enable the equipment to adjust its output to match the specific requirements of each operation, improving productivity and control.

6. Marine Applications:

Variators are also utilized in marine applications, including boats, yachts, and ships. CVTs with variators provide smooth and efficient power delivery, allowing for precise control of the vessel's speed. They offer benefits such as reduced vibration, improved fuel efficiency, and enhanced maneuverability.

In summary, variators are commonly used in automobiles, motorcycles, industrial machinery, agricultural equipment, construction and earthmoving machinery, and marine applications. They provide the ability to adjust speed or torque output continuously, resulting in improved performance, efficiency, and control in a wide range of vehicles and machinery.

China best Sinee Em630 High-Performance Special VFD Inverter Speed Variator for Tower Crane  China best Sinee Em630 High-Performance Special VFD Inverter Speed Variator for Tower Crane
editor by CX 2024-01-11

Variator Gearbox Co., Ltd.

Mail: [email protected]

As one of leading manufacturers, suppliers and exporters of mechanical products in China, We offer reducers, sprockets, industrial and conveyor chain, belts, pulleys, gears, racks, gearboxes, motors, PTO Shafts, taper lock Bushing, vacuum Pumps, screw air compressors and many other products. Please contact us for details.

Recent Posts

Contact us

Ever-power Variator Gearbox Co., Ltd.

Tel: +86-571-88220653/88220971
Fax: +86-571-88220651

Mail: [email protected]

contact us


As one of leading manufacturers, suppliers and exporters of mechanical products in China, We offer reducers, sprockets, industrial and conveyor chain, belts, pulleys, gears, racks, gearboxes, motors, PTO Shafts, taper lock Bushing, vacuum Pumps, screw air compressors and many other products. Please contact us for details.

Monday—Friday: 9:00AM–6:00PM
Saturday & Sunday: 10:00AM–4:00PM