Shenzhen Inomax Technology Co., Ltd.
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Simple introduction of Inomax
Inomax is professional manufacturer for Lowe voltage AC variable frequency drives ,Inomax VFD position is for complex application ,for the applicatin which have high request of technology of AC drives.
Inomax frequency converters which can compete with AB ACS580 ACS880 ,SIEMENS S120 ,S150, Schneider ATV9000,Yaskawa U1000, Mitshbishi FR800 ,Rockwell power flex 755T,700L,Fuji Frenic-VG,Eaton RGX series
Inomax also provide good solutions for our customer for -Industrial transmission,tension control,lifting,High-speed centrifuge,Precision machine tools,Multi-speed feedback control....
With the super good quality and competitive price , Inomax AC frequency invertet widely application for Steels, Cement, Chemical, Oil & Gas, Power, Polymer & Rubber, Pulp & Paper, Sugar, Minerals & Mining....
Inomax ACS880 multidrive
The Difference between Standard Regen and Low Harmonic Drives
There can be some confusion about inverter types – standard / 6-pulse, low harmonic, or regen drives. In this article, we explain the differences with their pros and cons.
6-Pulse Drives
These are the most common type of inverter and they have a diode rectifier on the input.
Advantages:
Relatively cost effective
Compact
Efficient (around 98%)
Readily available
Disadvantages:
Generates harmonics on the mains, especially those without a dc or ac choke
Wastes energy when braking (via a brake resistor)
Low Harmonic Drives
These fall into two categories – those utilising a passive filter and those with active front end. Inomax refer to their active front end inverters as Ultra Low Harmonic Drives to be clear about the technology employed.
Passive Filter Advantages:
Relatively cost effective
Simple
Passive Filter Disadvantages
Tuned for a specific load
Can get overloaded if load or supply changes
Non-dynamic
Bulky
Active Front End Advantages:
Transistor input bridge effectively does not create harmonics
Compact
Easy to install and use
Active Front End Disadvantages:
More expensive
Reduced inverter efficiency to around 95%. However, since there are effectively no harmonics generated, this efficiency loss is compensated within the power system by reducing the losses in the transformer, cables and motor when compared to a 6-pulse inverter
Regenerative (Regen) Drives
These drives share the same hardware as the low harmonic drives with active front end. In this case the input transistors are programmed to allow power to flow both ways i.e. into the motor and when under deceleration, from the motor back into the mains. This is particularly useful on cyclic loads such as hoists.
Advantages:
They can allow energy that would be wasted to regenerate back to the mains; this saves money
Excellent braking characteristics
Disadvantages:
High capital outlay
Reduced efficiency (the same argument applies as per low harmonic drives with active front end)
Inomax Low harmonic drive additional major benefits include:
1,Encoder-less Motor Operation - Superior dynamic-response performance of Inomax's patented Direct Torque Control (DTC) motor control algorithm. Many applications can be run without encoder feedback.
2,Flexibility - Only four types of diode rectifiers are used to invert AC three-phase input power to the common DC bus bar across the entire ACS880 power range (200 - 4600 HP). Inverter modules (drives) are available in five sizes (R4 - R8 frame sizes) and cover the 1 - 7000 HP range; single R8 units, or R8 units in parallel, supply the motors.
3,Compact Design - Improvements in technology and power components have reduced the total footprint of these multidrives by up to 50 percent, compared to the Traditional design.
4,Wide Range of Options - I/O extensions, field buses and a pulse encoder module all fit inside the inverters.
5,Adaptive Programming - This program extends the freely programmable I/O and extensive parameter selections built into the multidrives and accessed via the PC tool.
6,Reduced Installation Costs - Since the modular configuration utilizes a common DC bus, the cabling input power required is a single three-phase AC connection. Further, the cabling is wired to the rectifier module through a unique plug-in connector, which then powers the entire common DC line-up.
7,Redundancy - Common spare parts and the ability to keep running at reduced load, if module is disabled.
Overview of the construction An Inomax multidrive is built from several different sections.
The key units within these multidrive systems include:
1. Basic Line Modules (Basic Line Modules):
It is only designed for pure rectification, and the interior is composed of thyristor diodes and DC incoming line reactors. Electricity needs to be equipped with a brake module.
2. Feedback rectifier SLM module (Smart Line Module): [Not recommended]
Composed of IGBT and DC smoothing capacitor, it can rectify power supply and feed energy back to the grid. There must be a suitable front-end interface reactor SIM(L) for feedback. The DC bus voltage cannot be constant and adjustable. Usually under rated
load, the typical value of grid-side current harmonic THDi<30-35%
3. Active rectifier ALM module (Active Line Module): [Recommended and preferred use]
Composed of IGBT and DC smoothing capacitor, it has the function of feedback and rectification, and can also be controlled intelligently.
Control and maintain the bus voltage. The actual current effect produced on the power supply side is close to a sine wave, thereby suppressing harmful harmonics. This rectifier module must use a matching AIM incoming module.
At this time, the typical grid-side current and voltage harmonics under rated load
Applications
Inomax multidrive widely application for different area ,for example,Steels, Cement, Chemical, Oil & Gas, Power, Polymer & Rubber, Pulp & Paper, Sugar, Minerals & Mining, Electrical Engineering, Automobile & Building automation sector to provide the complete high quality energy efficient solution.
As the important role for marine automation ,Inomax VFD undertake important responsibility.
No matter for the Azimuth thruster or bow thruster ,or the Crane or the winch.Inomax always can give you a stisfied solution by super performacne and high quality.
Tunnelling shield machines play a crucial role in the construction of underground tunnels and are widely used in various industries such as transportation, mining and hydroelectric power. However,control the tunnelling shiled machine need have big torque and also need VFD with smaller size because the space limited. A reliable and efficient frequency control system is therefore essential for successful tunneling operations. INOMAX liquid cooling frequency drive solution offers an optimal control system that meets the demands of tunnelling operations.
The system consists of frequency drives, water-cooling system. can realize high-precision control of common induction motors and high-efficiency permanent magnet motors in the large power range under the condition of 380...690Vac power supply. The ultra-compact structure and high power density make it especially suitable for applications with limited installation space and harsh environments, and has excellent performance in various extreme environmental conditions.
Advantages of INOMAX Liquid Cooling Frequency Drive Solution
High Efficiency
INOMAX liquid cooling frequency drive solution is highly efficient and can provide up to 70% energy savings compared to conventional air-cooled systems. This is achieved through the use of water-cooled motors, which have a higher efficiency than air-cooled motors. The liquid coolers also ensure that the system operates at optimal temperatures, reducing energy consumption and minimizing wear on the components.
Reliable Performance
The INOMAX liquid cooling frequency drive solution is designed to offer reliable performance in harsh environments. The system is sealed and protected from dust, moisture and other contaminants.
Easy Maintenance
INOMAX liquid cooling frequency drive solution is easy to maintain and requires minimal downtime. The system is designed with easily accessible components, making it easy to replace or repair any faulty components. The liquid coolers are also designed with removable panels for easy cleani
Inomax multi-module drive ACS880 comes with various types of supply units including diode supply units and regenerative supply units and they are available as air and liquid cooled versions. Single supply and DC bus arrangement with several inverters reduce line power and system size.
Utilize premium control of virtually any type of AC motor with direct torque control (DTC), including induction and permanent magnet motors and synchronous machines. Solutions to many different applications (such as paper machines, winders, rolling mills, processing lines, cranes, drilling and marine) are possible with flexible connectivity and an extensive range of options.