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FAQ
Under normal circumstances, it is not allowed. Above 60Hz (there are also modes above 50Hz), with constant voltage, it generally has a constant power characteristic. When the same torque is required at high speeds, attention must be paid to the selection of the motor and inverter capacity.
Power can still be output below 6Hz, but depending on conditions such as motor temperature rise and starting torque, the minimum operating frequency is set around 6Hz. At this point, the motor can output rated torque without causing serious heating issues. The actual output frequency (starting frequency) of the inverter varies by model, ranging from 0.5 to 3Hz.
When the frequency decreases, the voltage is reduced in direct proportion. Since the AC impedance decreases while the DC resistance remains unchanged, this will tend to reduce the starting torque at low speeds. Therefore, at low frequencies, to achieve a certain starting torque, the output voltage should be increased somewhat when V/f is given. This compensation is called enhanced starting. Various methods can be used to achieve this, including automatic methods, selecting V/f modes, or adjusting potentiometers.
When the frequency decreases, the voltage V also decreases proportionally. This issue has been explained in answer 4. The proportional relationship between V and f is predetermined considering the motor characteristics, and several characteristics are usually stored in the controller's storage device (ROM), which can be selected using a switch or a dial.
Using a frequency converter for operation, the frequency and voltage increase correspondingly with the acceleration of the motor, and the starting current is limited to below 150% of the rated current (depending on the model, it can be 125% to 200%). When starting directly with a power frequency supply, the starting current is 6 to 7 times higher, which can cause mechanical and electrical shocks. Using a frequency converter allows for a smooth start (the starting time is extended). The starting current is 1.2 to 1.5 times the rated current, and the starting torque is 70% to 120% of the rated torque; for frequency converters with automatic torque boost function, the starting torque can exceed 100%, allowing for full load starting.
When the frequency decreases (low speed), if the output power remains the same, the current increases, but under the condition of constant torque, the current remains almost unchanged.
The torque of the motor is generated by the interaction between the magnetic flux and the current flowing through the rotor. At the rated frequency, if the voltage is constant and only the frequency is reduced, the magnetic flux becomes too large, the magnetic circuit saturates, and in severe cases, it can burn out the motor. Therefore, the frequency and voltage must change proportionally, meaning that while changing the frequency, the output voltage of the inverter should be controlled to keep the magnetic flux of the motor constant, avoiding weak magnetism and magnetic saturation phenomena. This control method is often used in energy-saving variable frequency drives for fans and pumps.
The main circuit of the inverter can be roughly divided into two categories: the voltage type, which converts the DC of a voltage source into AC, with the filtering of the DC circuit done by capacitors; and the current type, which converts the DC of a current source into AC, with the filtering of the DC circuit done by inductors.
Product Introduction
Product Introduction:
Easy Arm™ - Suspended
1. The G-Force, Easy Arm, and G-Jib series together form a new family of material handling equipment - Intelligent Auxiliary Devices (IAD). The products utilize unique patented technology and servo motor drive programs controlled by industrial processors, providing customers with unparalleled lifting speed and precision.
2. This series of products integrates advanced technology with basic personnel guidance, maximizing production efficiency and minimizing the risk of injury to operators.
3. Lifting capacity: 75kg
4. Span up to 3m
5. Lifting speed up to 45 meters/minute
6. Suspended from the ceiling or operating platform
7. The structure of the suspended equipment must meet the requirements for overturning moment.
8. A safe, efficient, and user-friendly overall handling solution.
9. The Easy Arm intelligent lifting device can be equipped with G-Force-Q/iQ series servo motor drives, combining the advantages of a folding arm crane and G-Force's stepless speed change, allowing users to freely adjust the material handling speed.
Product Features:
Advantage Analysis:
1. Saves workshop floor space
2. Suspended on existing beam cranes
3. Two support points make it easy for the equipment to bypass obstacles or enter machine tools and machinery.
4. Unmatched precision
5. G360™ air and electrical collector and rotating components prevent cables from tangling.
Optional Accessories:
1. iQ series with more intelligent features
2. Floating mode
3. Sliding handle or suspended handle options
4. Universal trolley design
5. Shock-absorbing stop device
6. Safety hook
7. Portable base plate
8. Air hose
9. Transformer
Product Applications:
1. Extend into a work unit or bypass obstacles
2. Avoid overhead obstacles, such as conveyor belts or exhaust pipes.
3. High-frequency handling
4. Loading and unloading machined parts
5. Transporting workpieces between two work units.
Easy Arm - Self-supporting
Product Introduction:
1. The G-Force, Easy Arm, and G-Jib series together form a new family of material handling equipment - Intelligent Auxiliary Devices (IAD). The products utilize unique patented technology and servo motor drive programs controlled by industrial processors, providing customers with unparalleled lifting speed and precision.
2. This series of products integrates advanced technology with basic personnel guidance, maximizing production efficiency and minimizing the risk of injury to operators.
3. Lifting capacity: 75kg and 150kg
4. Span 1.8m - 4.3m
5. Hook height range 1.8m - 3.4m
6. Lifting speed up to 45 meters/minute
7. Cost-effective overall handling solution
8. The Easy Arm™ intelligent lifting device can be equipped with G-Force™-Q/iQ series servo motor drives, combining the advantages of a folding arm crane and G-Force™'s stepless speed change, allowing users to freely adjust the material handling speed.
Product Features:
Advantage Analysis:
1. Saves workshop floor space
2. Suspended on existing beam cranes
3. Two support points make it easy for the equipment to bypass obstacles or enter machine tools and machinery.
4. Unmatched precision
G360™ air and electrical collector and rotating components prevent cables from tangling.
Optional Accessories:
1. iQ series with more intelligent features
2. Floating mode
3. Sliding handle or suspended handle options
4. Universal trolley design
5. Shock-absorbing stop device
6. Safety hook
7. Portable base plate
8. Air hose
9. Transformer
Product Applications:
1. Extend into a work unit or bypass obstacles
2. Avoid overhead obstacles, such as conveyor belts or exhaust pipes.
3. High-frequency handling
4. Loading and unloading machined parts
5. Transporting workpieces between two work units.
G-Force-iQ series
Product Introduction:
1. The G-Force, Easy Arm, and G-Jib series together form a new family of material handling equipment - Intelligent Auxiliary Devices (IAD). The products utilize unique patented technology and servo motor drive programs controlled by industrial processors, providing customers with unparalleled lifting speed and precision.
2. This series of products integrates advanced technology with basic personnel guidance, maximizing production efficiency and minimizing the risk of injury to operators.
3. Higher lifting capacity: capable of lifting 75kg - 600kg.
4. Faster speed: maximum speed up to 61 meters/minute.
5. Stronger responsiveness: quicker acceleration and deceleration.
6. Using one G-Force™ device can effectively cover multiple work units.
7. Can cover a larger area of a single work zone.
8. High lifting capacity, low product damage rate, quick return on investment.
9. Low accident risk, safe working environment.
10. More environmentally friendly (dust-resistant, moisture-resistant).
11. The G-Force™-iQ series is a unique product of our company, adding input/output port functionality compared to the Q series, making it more intelligent.
Product Features:
Advantage Analysis:
1. The patented G360™ collector and rotating components effectively prevent damage to standard hoses and (optional) air hoses.
2. Handles can be changed on-site, making configuration convenient.
3. Free and intelligent servo motor controlled lifting.
4. Standard floating mode.
5. Standard retractable hose, with optional air hose.
6. The hand controller is equipped with an LCD display, showing more information such as system status, diagnostic information, etc.
7. Continuous operation completed through photoelectric sensors.
8. User-friendly sliding handle design.
9. Saves installation time and costs, easy to install.
Optional Accessories:
1. Sliding handle or suspended handle options.
2. Simple virtual limit function settings.
3. Deceleration point settings.
4. Shock-absorbing stop device.
5. Hook.
6. Extended steel cable drop device.
7. Air Hose Sliding Device
8. Transformer
9. Universal Trolley Adapter
G-Force-Q Series
Product Introduction:
1. The G-Force, Easy Arm, and G-Jib series together form a new family of material handling equipment - Intelligent Auxiliary Devices (IAD). The products utilize unique patented technology and servo motor drive programs controlled by industrial processors, providing customers with unparalleled lifting speed and precision.
2. This series of products integrates advanced technology with basic personnel guidance, maximizing production efficiency and minimizing the risk of injury to operators.
3. Higher lifting capacity: capable of lifting 75kg - 600kg.
4. Faster speed: maximum speed up to 61 meters/minute.
5. Stronger responsiveness: quicker acceleration and deceleration.
6. Using one G-Force™ device can effectively cover multiple work units.
7. Can cover a larger area of a single work zone.
8. High lifting capacity, low product damage rate, quick return on investment.
9. Low accident risk, safe working environment.
10. More environmentally friendly (dust-resistant, moisture-resistant).
11. The G-Force™-Q series is the basic model of our company's proprietary products, providing the same speed and accuracy as our high-end iQ series, but without the additional input/output port features of the iQ series.
Product Features:
Advantage Analysis:
1. The patented G360™ collector and rotating components effectively prevent damage to standard hoses and (optional) air hoses.
2. Handles can be changed on-site, making configuration convenient.
3. Free and intelligent servo motor controlled lifting.
4. Standard floating mode.
5. Standard retractable hose, with optional air hose.
6. The hand controller is equipped with an LCD display, showing more information such as system status, diagnostic information, etc.
7. Continuous operation completed through photoelectric sensors.
8. User-friendly sliding handle design.
9. Saves installation time and costs, easy to install.
Optional Accessories:
1. Sliding handle or suspended handle options.
2. Simple virtual limit function settings.
3. Deceleration point settings.
4. Shock-absorbing stop device.
5. Hook.
6. Extended steel cable drop device.
7. Air Hose Sliding Device
8. Transformer
9. Universal Trolley Adapter
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Manufacturing address：intersection of Caibin West Street and Deren Road in Changchun China-Korea (Changchun) International Cooperation Demonstration Zone
Service Address：No.3 Fumin Street, Lvyuan District, Changchun City
Website：www.兴泰起重.中国
www.crane-china.cc
WeChat service number： xingtaiqizhong
Zip Code：130012
Sales Advisory Phone：400-044-6608/13578886608WeChat Synchronization (Mr. Zhang)
After-sales service telephone：18343082566(Mr. Yu)/400-044-6608
Landline：0431-87096377
Fax：0431-87096377
Copyright：Changchun Xingtai Crane Machinery Co.,Ltd