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Variable Frequncy Drive & Encoder Limit

Your Professional Variable Frequncy Drive & Encoder Limit Supplier

 

 

Joytech is committed to becoming a leading global manufacturer of access control automation. The company specializes in the research, development, and manufacturing of high-end intelligent drive systems for access control. Its product line includes sliding gate operators, swing gate operators, garage door operators, industrial door operators, high-speed door operators, servo barrier gates, and DC brushless barrier gates. The company provides integrated solutions and core drive technology support for applications such as intelligent access and smart parking management.

 

 
 
Why Choose Us

 

Globally Recognized
During 16-year history, we've possessed quality certificates ISO9001:2008 International Quality System, ISO14001:2015 Environmental Management System and OHSAS18001:2007 Occupational Health&Safety Management System, all products have been certified by CE and CCC.

 

Quality Assurance
We Strict quality control, flexible MOQ, efficient production, ready to ship in 15 days for MOQ300.

 

Global Markets
With stable product quality and professional service, Joytech has established long-term partnerships with customers in over 110 countries and regions around the world.

 

Achievements
Leveraging our profound technical expertise and continual innovation capabilities, we've established business relations with more than 300 overseas customers, helped them achieve significant improvements.

 

Advantages of Variable Frequncy Drive
 

Enhanced Energy Efficiency
Among the most compelling benefits of VFDs is their remarkable ability to enhance energy efficiency, which, in turn, trims down energy expenses.

 

Controlled Starting Current
VFDs offer another feather in their cap by effectively managing the startup current. They possess the capability to initiate motors at zero voltage and frequency, which not only minimizes the wear and tear on motors but also extends their operational lifespan, reducing the need for frequent maintenance and repair.

 

Equipment Safeguard
Another remarkable aspect of VFDs is their capacity to tailor and limit torque, ensuring that motors do not venture beyond their safe torque limits. This proactive measure shields machinery and equipment, preempting damage and averting potential production disruptions.

 

Voltage Sag Mitigation
Voltage sags, characterized by transient voltage drops, frequently plague industrial settings, often occurring during the activation of sizable AC motor lines. These sags can be detrimental to delicate equipment like computers and sensors.

 

Precision Process Control
In the realm of industrial manufacturing, VFDs prove invaluable for optimizing production processes by allowing fine-tuned control over motor speeds. This optimized operation ensures consistent product quality and aids in the maintenance of stringent quality standards.

 

Noise Reduction
While not their primary purpose, VFDs do the service of reducing ambient noise levels by operating motors at lower speeds. This feature is particularly advantageous in industrial environments where lowered ambient noise levels contribute to improved working conditions and smoother communication on the factory floor.

 

Advantages of Encoder Limit

 
 
01
 

Space and Weight Savings:

Encoder limits eliminate the need for bulky physical limit switches, cams, and extra wiring at the ends of the stroke. This creates a highly compact and lightweight mechanical footprint.

 
02
 

Reduced Mechanical Wear:

Physical limit switches and their actuators suffer from repeated mechanical stress and physical wear and tear. Because encoder limits function through the continuous position tracking of the encoder, they eliminate this physical contact, extending the lifespan of the equipment.

 
03
 

Dynamic Adjustments:

With traditional limit switches, changing the travel distance requires physically moving the switch or the triggering cam. Encoder limits can be instantly reprogrammed in the software, making machine adjustments faster and more flexible.

INDUS40BP/INDUS70BP/INDUS100BP/INDUS60SBP/INDUS100SBP/INDUS150SBP

 

 

Technical Parameter

 

 

Model (Three Phase AC220V)

INDUS150BP

INDUS240BP

Rated Power

850W

1100W

Torque

150N.m

240N.m

No-load Continuous Running Time

15min

Max. gate area

50m2

65m2

Model (Three Phase AC380V)

INDUS200SBP

INDUS320SBP

Rated Power

850W

1100W

Torque

200N.m

320N.m

Max. gate area

60m2

70m2

No-load Continuous Running Time

15 min

Other Parameters:

Thermal Protection Temperature

120℃

Reduction Ratio

1:70

No-load Rotation Speed

20r/min

Lubricating System

Oil-immersed

Noise

≤55dB

Hand Release Device

360°Hand-pulled chain

Maximum Travel Limit

Output shaft rotates 24rounds

Encoder Type

Single Circle Absolute Encoder

Output Shaft Diameter

Φ25.4/Φ31.8/Φ40

Environment Temperature

-20℃ ～+50℃

Working Duty

S2-15min

Protection Class

IP54

Operator Dimension(mm)

395x255x175

420x255x175

Operator Weight(kg)

17

19

 

Types of Variable Frequncy Drive
 

Electro-machine frequency drives

Electro-machine or inductive frequency drives are alternating current motors that are switched to generator mode.

Electronic frequency drives

Semiconductor frequency drives consist of the power part, based on transistors or thyristors, and control circuitry based on microcontrollers. This electrical equipment is suitable for three-phase and single-phase drives for any purpose.

Direct frequency drives

These frequency drivers are built based on thyristor converters, connected by the bridge, cross, zero, and counter-parallel schemes. Devices of this type are plugged directly into the mains.

 

Types of Encoder Limit

 

INDUS40BP/INDUS70BP/INDUS100BP/INDUS60SBP/INDUS100SBP/INDUS150SBP suppliers

Linear Encoders

 

Linear encoders measure the movement of objects along a path or line, such as in the cut-to-length application mentioned earlier. This type of encoder uses a transducer to measure the movement or distance between two points. Depending on the application, it may utilize a cable (for longer distances) or a small rod (for shorter distances).

Rotary Encoders

 

Rotary encoders provide feedback about the movement of a rotating object or device, such as a motor shaft. The encoder converts the angular position of the moving shaft into an analog or digital output signal that enables a control system to establish the shaft’s position or speed.

Angle Encoders

 

Angle encoders are similar to rotary encoders in that they monitor and provide feedback on rotational movement. However, angle encoders are distinguished by their higher accuracy, making them ideal for applications where precise angular measurements are critical.

Key Components of Variable Frequncy Drive

Converter
The converter, or AC input rectifier, help convert the AC voltage to a DC voltage. The converter is made up of multiple diodes that are connected parallel to each other and only allow the current to travel in one direction.

 

DC Link
DC Link is a filtering section made up of filter inductors and capacitors. The purpose of DC Link is to smoothen the rippled DC voltage obtained out of the rectifier circuit in the previous step. The filtered output is then fed to the input of the inverter.

Inverter

The purpose of the Inverter is to convert the output of the DC link, which is the filtered DC voltage, back into AC. The Inverter is used to control the variable voltage, variable frequency output to the motor. The Inverter is composed of IGBT switches that are connected in pairs to control the electrical flow.

User interface

To achieve optimal power usage or save energy, a user interface is needed to configure the VFD. A User interface is a control panel that is connected the VFD, allowing for manual user input. These range from a keypad to LCD touch screens.

Control logic

The user defined setting is then interpreted by the Control logic. It is the software needed for the VFD to communicate with the user interface and the feedback device on the motor.

 

Key Components of Encoder Limit

 

Code Disk or Magnetic Ring:

The code disk (in optical encoders) or magnetic ring (in magnetic encoders) defines the physical position pattern. These patterns represent specific angular or linear positions that the sensor can detect.

Sensor Array:

The sensing element detects the encoded patterns. Optical encoders use photodetectors, magnetic encoders use Hall-effect or magnetoresistive sensors, and inductive encoders rely on electromagnetic sensing structures to detect position changes.

Signal Processing Electronics:

Raw analog signals from the sensor are amplified, filtered, and converted into digital position data.

 

 

Working principle of Encoder Limit

During operation, the rotating shaft or moving scale interacts with a sensing element. This interaction produces an electrical signal that corresponds to the physical position. The signal is then conditioned and encoded into a digital format. The controller receives this data through a communication interface and uses it to regulate motion in real time within a closed-loop control system.

INDUS200SBP/INDUS320SBP

 

 
Working principle of Variable Frequency Drive
 
01/

Rectification
The VFD’s journey begins with the rectifier, where the 3-phase alternating current is converted into direct current. A typical rectifier is a six-pulse rectifier that consists of 6 diodes.

02/

Speed Control
The speed or revolutions per minute of the electric motor is related to the frequency of the inverted AC (speed equals frequency divided by poles and times 120).

03/

Filtration
Next, the rectified current flows through the filter/DC bus. The DC bus is used to smooth the ripple in DC. This is done through capacitors and resistors. Although the DC bus is only represented by only 1 capacitor and 1 resistor, there are actually various capacitors and resistors associated in series and in parallel.

04/

Inversion
This step converts the DC into AC as a pulse width modulated output through an inverter. An inverter is basically a number of IGBTs (insulated gate bipolar transistors), which can be seen as switches that can turn on/off several thousand times per sec.

 

 

FAQ

 

 

Q: What are the benefits of a variable frequency drive?

A: VFDs help adjust motor speeds to match loads and improve efficiency while conserving energy. The benefits of VFDs are widely documented and may include: Ability to compensate for changing irrigation demands (flow and pressure), which may reduce energy consumption. Reduced maintenance costs.

Q: What are the limitations of a variable frequency drive?

A: A VFD can make a motor produce more than its rated torque but only briefly. The amount of time is limited by either the drive's overload capacity or the motor's thermal capacity. A drive cannot make a motor produce more than its maximum torque. Max torque or Stall Torque is generally not shown on the motor's nameplate.

Q: Is VFD used in AC or DC?

A: A variable frequency drive (VFD) is an electronic device that controls the speed of AC induction motors.

Q: What are the advantages of an encoder?

A: Benefits of Encoders
Encoders deliver high-resolution feedback that allows systems to execute precise movements. This is essential in applications like CNC machining, where even a slight error can lead to product defects. Shaft encoders enable real-time feedback on speed, position, and direction.

Q: What are the limitations of encoders?

A: The limitations of encoders include their sensitivity to environmental factors like dust, moisture, and extreme temperatures. For instance, optical encoders can be affected by dirt, which may reduce accuracy or even disrupt functionality.

Q: What are the 4 types of encoding?

A: The four primary types of encoding are visual, acoustic, elaborative, and semantic. Encoding of memories in the brain can be optimized in a variety of ways, including mnemonics, chunking, and state-dependent learning.

As one of the most professional variable frequncy drive & encoder limit manufacturers and suppliers in China, we're featured by quality products and low price. Please rest assured to wholesale cheap variable frequncy drive & encoder limit made in China here from our factory. Customized orders are welcome.

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