Tag Archives: udl speed variator

China factory Udl Series Speed Variator Both in Foot and Flange Mounted with Great quality

Solution Description

Solution Description

Item Characteristics:
one.Substantial speed-regulating precision :.5-1 rotation
two.Higher pace-changing assortment: ratio from 1:1.4 to 1:7 freely
three.High energy and long support life
4.Hassle-free to control speed
five.Can operate continuously, front to back again working course, smooth running,secure efficiency, and low sound.
six.Sealed totally and suitable for any atmosphere
seven.Companct structure and small volume
eight.Made of large good quality aluminium alloy diecast into foarming, good appearance,light fat and non-rusty.9.Very good adaptation:UDL series speed variators can be blended with all kinds of pace reducers to achive lower stepless pace regulating(such as R-K-F-S Series and NMRV worm reducers).
Programs:
UDL collection stepless speed variators are broadly employed for foodstaffs, packing, substances,pharmacy,plastics, paper-producing, machine resources,communications and all sorts of computerized strains,pipelines and assembly strains which need pace regulating. It is a good companion for manufacturing equipment.

Detailed Pictures

Solution Parameters

 

Outline Dimension:

Company Profile

About our organization:
We are a professional reducer manufacturer found in HangZhou, ZHangZhoug province.Our foremost merchandise is  full range of RV571-a hundred and fifty worm reducers , also supplied hypoid helical gearbox, Personal computer models, UDL Variators and AC Motors.Products are broadly utilised for programs this sort of as: foodstuffs, ceramics, packing, chemical substances, pharmacy, plastics, paper-producing, construction machinery, metallurgic mine, environmental security engineering, and all types of automated traces, and assembly strains.With quick delivery, exceptional soon after-product sales services, innovative creating facility, our items sell well  both at home and overseas. We have exported our reducers to Southeast Asia, Eastern Europe and the Center East and so on.Our aim is to build and innovate on the foundation of substantial high quality, and create a good reputation for reducers.
 Workshop:
Exhibition:

We take part Germany Hannver Exhibition-ZheJiang PTC Honest-Turkey Earn Eurasia

Packaging & Transport

Packing info:Plastic Luggage+Cartons+Wood Cases , or on ask for.

Set up Directions

To install the reducer, it is needed to notice the pursuing problems:
one)Check the right rotation path of output shaft just before fitting reducer to machines.
two)Prior to mounting, pls verify shaft diameter, bore diameter, important and keyway, to be certain their dimension are not deviation In purchase to keep very good overall performance, also pls keep away from assembling way too tight or also free. 
three)Reducer must be mounted to devices stably to keep away from vibration.
four)Each time achievable,defend the reducer in opposition to photo voltaic radiation and undesirable weather conditions.
five)In the scenario of especially lengthy time period of storage(4-6 months), if the oil seal is not immersed in CZPT inside of the unit, it is advised to change it considering that the rubber could stick to the shaft or may even have missing the elasticity.
six)Painting have to undoubtedly not go in excess of rubber elements and the holes on breather plug if any.
seven)When join with hollow or reliable shaft, pls grease the joint to keep away from lock or oxidation.
eight)Verify the right CZPT degree by means of indicator if there is a single.
nine)Starting should consider location progressively, without instantly applying the greatest load.
10)When utilizing different of motors to match reducer directly, supporting device is necessary if motor is way too heavy.
11)Make sure very good warmth dissipation by trying to keep great ventilation close to the motor supporter.
twelve)In the scenario of ambient temperature40ºC, pls call the technical division.

Following Revenue Services

1.Routine maintenance Time and Guarantee:Inside of 1 year soon after receiving merchandise.
2.Other ProviderWhich includes modeling assortment guide, installation information, and issue resolution guidebook, etc.

FAQ

one.Q:Can you make as for every consumer drawing?
A: Sure, we provide customized services for buyers accordingly. We can use customer’s nameplate for gearboxes.

two.Q:What is your conditions of payment ?
   A: 30% deposit ahead of production,equilibrium T/T before shipping and delivery.
3.Q:Are you a trading firm or company?
   A:We are a manufacurer with superior tools and experienced staff.
4.Q:What’s your production capacity?
   A:8000-9000 PCS/Month
five.Q:Free sample is accessible or not?
   A:Sure, we can provide totally free sample if customer agree to pay for the courier price
six.Q:Do you have any certification?
   A:Indeed, we have CE certificate and SGS certificate report.
Get in touch with info:
Ms Lingel Pan
For any concerns just come to feel free ton make contact with me. Numerous many thanks for your kind attention to our firm!

How to Pick a Planetary Gearbox for Your Purposes

You can choose the most appropriate Planetary Gearbox for your applications right after very carefully checking the a variety of functions. You should also think about secondary features like sounds stage, corrosion resistance, development, price, delivery time and support. You ought to also examine if the constructor is available across the entire world, because some constructors work more quickly than other people. Some constructors even react to your requests on the identical day, although other people supply every planetary gearbox even if they are out of stock.
planetarygearbox

CZPT gearbox

An CZPT planetary gearbox is a high-quality, compact, and lightweight gearbox that distributes loads above many gears. The planetary gearbox has a polymer scenario that ensures quiet operation. The firm is fully commited to the round economic system, investing in chemical recycling and marketing the use of recycled components wherever achievable. For far more information, pay a visit to CZPT’s web site or contact an CZPT skilled nowadays.
A planetary gearbox includes a sunlight equipment, which is recognized as the enter equipment. The other gears are known as planets, and these are mounted on a carrier, which is linked to an output shaft. A planetary gearbox is characterised by its higher reduction ratios, power cost savings, and compact design. It offers excellent sturdiness and trouble-free support. Whether or not you need a massive or tiny planetary gearbox, you can uncover one to suit your wants.
The Normal sequence planetary gearboxes are a cost-effective different to quality sequence gearboxes. These gearboxes are ideal for apps necessitating only delicate backlash or with lower IP65 security. ABB positioners function seven different gear device variants, permitting for standardized mounting and stranded wire connections. The drygear(r) strain wave equipment has a stranded wire connector and is obtainable with a three-year guarantee.
A planetary gearbox can be utilised for different purposes, from lifting products to loading and unloading products in a factory. The company has a broad merchandise assortment for diverse purposes, like plastic equipment and equipment tools, decide-and-area robots, mill drives, and wind turbines. It can also be used to run robotic gripper systems. Its large-top quality planetary gears are developed to final for many several years, creating it an excellent solution for a lot of industries.

CZPT

A planetary gearbox is an vital element of many transport programs. These products perform by aligning the output and enter shafts. The Reggiana planetary gearbox 2000 series consists of bevel levels and linear variants. The business provides modularity and adaptability with output configurations in ten various equipment dimensions. Every planetary gearbox can also be custom-made to meet up with the distinct requirements of a distinct application.
CZPT is the Australian department of CZPT, a leading world-wide maker of planetary gearboxes. CZPT is found in Carrum Downs, south east of Melbourne, and is a single of the top suppliers of planetary reduction gears, hydraulic failsafe brakes, and wheel drives. The organization aims to offer high-top quality, resilient goods that can be used in a range of apps.
A CZPT Additionally Collection Gear is created to maximize overall flexibility in a variety of purposes. The gearbox’s modular design and style allows for unlimited scalability. The CZPT In addition Sequence Gear is generally utilised in mining operations, and is known for its raw output abilities and minimal upkeep design. It is created with substantial-quality components, and it is also accessible in several sizes for tailored applications.
The multi-phase planetary gearbox can mix individual ratios to enhance the all round multiplicative element. The planetary gears may possibly also be blended to enhance the transmittable torque. The output shaft and drive shaft might rotate in opposite directions, or they can be fixed so the gearbox can perform in both path. If the ring gear is mounted, planetary gearboxes can be realized as multi-phase.
planetarygearbox

CZPT

The CZPT Planetary Gearbox is the perfect mix of compact dimension and large performance in electricity transmission. The compact style allows this gearbox to operate silently even though still offering higher energy density and transmission efficiency. The CZPT Planetary Gearbox has several positive aspects. Unlike standard planetary gearboxes, CZPT’s planetary gearbox characteristics high electrical power density, lower torque, and ideal transmission effectiveness.
CZPT’s products have been utilized in a selection of purposes for a lot of a long time, proving their trustworthiness and top quality. These merchandise are renowned in the entire world for their reliability and top quality. CZPT’s planetary gearboxes are backed by a five-yr warranty. These attributes help buyers decide on a planetary gearbox that fulfills their wants and stays in prime condition for several years to arrive. But how do you test a planetary gearbox?
Figure seventeen exhibits the reaction of a planetary gearbox to vibration. The optimum displacement in xg direction at a fifty% crack level is demonstrated by the dashed line. The signal in xg course is called the xsignal. Furthermore, the CZPT Planetary Gearbox’s vibration response is extremely delicate to the location of the bearings. For this purpose, dynamic modeling of a planetary gearbox must consider bearing clearance.
CZPT’s hollow cup motor generate program features substantial dependability and reduced power usage. The gearbox is compatible with industries with large top quality standards, as there is no cogging torque. Its compact dimension and minimal electromagnetic noise make it ideal for a variety of apps. For industries with large solution high quality requirements, the CZPT Hollow Cup Motor Drive System is an outstanding option. It is also made for vertical set up. You can even buy several CZPT goods to fulfill your specific demands.

CZPT

With its PL sequence planetary gearboxes, CZPT has expanded its merchandise portfolio to incorporate much more varieties of drive solutions. CZPT is one of the number of businesses to have won the Schneider Electrical Supplier Award for High quality. In addition, its high-quality planetary gearboxes are highly customizable, making it possible for designers to customize every single gearbox for the application at hand. Whether or not it is a geared pump or a stepper motor, CZPT’s PLE planetary gearboxes are built to fulfill the precise specs of the application at hand.
The flange-mounted edition of the planetary gearbox is similar to its planetary counterpart. Using a flange-mounted planetary gearbox enables for a smaller sized, a lot more compact design. This design also attributes a massive-diameter output shaft, which helps achieve a greater degree of torsional stiffness. This can make CZPT flange gearboxes especially useful for programs exactly where the course of movement can adjust frequently. These gearboxes can be employed with a wide range of belts.
The PLQE sixty-mm gearbox is used in Outrider’s single-phase design. Its gear ratio is 5:1, whilst its dual-stage edition has a fifteen:1 equipment ratio. Each gearboxes have similar mounting configurations, but the two-phase edition is a bit longer.
The PLN series of planetary gearheads from CZPT are the regular for large-precision purposes. They’re compatible with all major motor manufacturers and measurements, and the company’s adapter kits are offered to fit practically any motor. This makes CZPT gearheads one of the easiest to integrate into a complex equipment. They are also incredibly simple to set up, with the same torque as their corresponding spur gears.
planetarygearbox

CZPT’s

If you are looking for an productive answer for screw press programs, think about making use of CZPT’s 300M Planetary Gearbox. It has high axial and radial load capacities, compact design, large torque output, and torque arm. The 300M planetary gearbox is suitable with a assortment of screw presses, including hydraulic push methods and digester techniques. Its Torque manage and direct coupling characteristic can make it effortless to install.
CZPT’s small planetary gearboxes have an output torque of twenty:1 from individual ratios of 5:1 and 4:1. They operate silently and produce highest transmission efficiency. The planetary gears are mounted on a ring that is fastened close to the center solar gear. The ring functions as an output torque converter for the up coming world phase. This planetary gearbox has multiple phases and a optimum ratio of 20:1 can be designed from specific ratios of 5:1 and 4:1.
CZPT Motor is an innovator in the design and style and manufacture of miniature motors for industrial robots. Its choices incorporate brushless DC and brushed DC motors, as well as planetary gearboxes, encoders, and brakes. CZPT’s products have a assortment of utilizes in robotics, clever appliances, healthcare products, interaction, and industrial automation. The firm is also fully commited to offering custom made designs based on buyer specifications.
An additional advantage of a planetary gearbox is its large energy transmission effectiveness. It is capable of about 3% per phase, enabling it to transmit a lot more torque than a typical single-stage gearbox. Planetary gearboxes are also compact and have a large torque-to-bodyweight ratio. CZPT’s Planetary Gearbox is the best decision for numerous apps. This gearbox provides the highest effectiveness and is perfect for small-scale creation.

China factory Udl Series Speed Variator Both in Foot and Flange Mounted     with Great qualityChina factory Udl Series Speed Variator Both in Foot and Flange Mounted     with Great quality

China Best Sales Udl Series Speed Variator for AC Electrical Motor with Best Sales

Item Description

Solution Description

Product Traits:
one.Higher velocity-regulating precision :.5-1 rotation
two.Higher pace-modifying selection: ratio from 1:1.4 to 1:7 freely
three.High strength and extended support lifestyle
4.Practical to control speed
5.Can operate continually, entrance to back again working course, smooth operating,secure efficiency, and lower sound.
six.Sealed entirely and appropriate for any environment
seven.Companct construction and modest quantity
eight.Created of higher high quality aluminium alloy diecast into foarming, wonderful visual appeal,light-weight bodyweight and non-rusty.9.Excellent adaptation:UDL series pace variators can be merged with all types of pace reducers to achive lower stepless speed regulating(this sort of as R-K-F-S Collection and NMRV worm reducers).
Programs:
UDL sequence stepless speed variators are broadly utilised for foodstaffs, packing, substances,pharmacy,plastics, paper-producing, equipment instruments,communications and all varieties of computerized lines,pipelines and assembly lines which want velocity regulating. It is a good companion for manufacturing equipment.

In depth Photos

Item Parameters

 

Define Dimension:

Company Profile

About our company:
We are a professional reducer maker positioned in HangZhou, ZHangZhoug province.Our foremost goods is  full selection of RV571-a hundred and fifty worm reducers , also equipped hypoid helical gearbox, Personal computer units, UDL Variators and AC Motors.Goods are commonly utilised for programs these kinds of as: foodstuffs, ceramics, packing, chemical compounds, pharmacy, plastics, paper-generating, construction machinery, metallurgic mine, environmental protection engineering, and all kinds of automated lines, and assembly strains.With fast supply, exceptional following-product sales provider, superior producing facility, our goods offer well  both at residence and overseas. We have exported our reducers to Southeast Asia, Japanese Europe and the Center East and so on.Our goal is to build and innovate on the basis of large high quality, and create a good popularity for reducers.
 Workshop:
Exhibition:

We take part Germany Hannver Exhibition-ZheJiang PTC Reasonable-Turkey Get Eurasia

Packaging & Shipping and delivery

Packing information:Plastic Baggage+Cartons+Wooden Instances , or on ask for.

Set up Instructions

To install the reducer, it is needed to notice the pursuing problems:
1)Check out the correct rotation direction of output shaft ahead of fitting reducer to equipment.
two)Before mounting, pls verify shaft diameter, bore diameter, crucial and keyway, to be sure their dimension are not deviation In get to maintain great efficiency, also pls stay away from assembling too restricted or also unfastened. 
three)Reducer need to be mounted to devices stably to steer clear of vibration.
four)Anytime feasible,defend the reducer in opposition to photo voltaic radiation and poor weather conditions.
five)In the circumstance of particularly prolonged period of time of storage(4-6 months), if the oil seal is not immersed in CZPT inside the device, it is suggested to modify it since the rubber could stick to the shaft or could even have missing the elasticity.
six)Painting should certainly not go above rubber elements and the holes on breather plug if any.
7)When join with hollow or strong shaft, pls grease the joint to avoid lock or oxidation.
8)Verify the appropriate CZPT amount via indicator if there is one.
nine)Beginning have to take place progressively, with out immediately making use of the optimum load.
10)When using various of motors to match reducer directly, supporting unit is needed if motor is also large.
11)Guarantee good heat dissipation by maintaining great air flow near the motor enthusiast.
twelve)In the case of ambient temperature40ºC, pls call the technical department.

Soon after Sales Service

1.Upkeep Time and Guarantee:In 1 yr after acquiring items.
two.Other SupportSuch as modeling selection information, installation guidebook, and difficulty resolution manual, etc.

FAQ

one.Q:Can you make as per client drawing?
A: Sure, we offer personalized provider for consumers accordingly. We can use customer’s nameplate for gearboxes.

2.Q:What is your terms of payment ?
   A: thirty% deposit prior to manufacturing,harmony T/T ahead of supply.
3.Q:Are you a trading firm or company?
   A:We are a manufacurer with innovative tools and knowledgeable employees.
four.Q:What is actually your manufacturing potential?
   A:8000-9000 PCS/Month
5.Q:Cost-free sample is offered or not?
   A:Indeed, we can offer totally free sample if consumer agree to shell out for the courier cost
6.Q:Do you have any certification?
   A:Sure, we have CE certificate and SGS certificate report.
Speak to information:
Ms Lingel Pan
For any concerns just feel free ton make contact with me. Numerous many thanks for your variety interest to our organization!

A Quick Overview of the Spur Gear and the Helical Planetary Gearbox

This report will give a transient overview of the Spur gear and the helical planetary gearbox. To discover a lot more about the benefits of these gearboxes, go through on. Below are a number of common employs for planetary gears. A planetary gearbox is utilised in a lot of automobiles. Its performance tends to make it a well-known option for tiny engines. Below are a few examples. Each has its rewards and downsides. Let us investigate every 1.
planetarygearbox

helical planetary gearbox

In terms of price, the CZPT is an entry-level, extremely trustworthy helical planetary gearbox. It is suitable for apps exactly where place, fat, and torque reduction are of high concern. On the other hand, the X-Treme sequence is suitable for programs requiring higher-acceleration, high-axial and radial masses, and substantial-pace functionality. This post will examine the rewards of each sort of planetary gearbox.
A planetary gearbox’s traction-based layout is a variation of the stepped-earth style. This variation relies on the compression of the components of the stepped-earth design and style. The ensuing style avoids restrictive assembly problems and timing marks. When compared to standard gearboxes, compound planetary gears have a greater transmission ratio, and they do so with an equal or scaled-down volume. For instance, a 2:1 ratio compound earth would be employed with a 50-ton ring gear, and the result would be the same as a one hundred-ton ring equipment, but the planetary disks would be half the diameter.
The Helical planetary gearbox makes use of 3 factors: an input, an output, and a stationary place. The simple model is hugely productive and transmits 97% of the input energy. There are 3 main sorts of planetary gearboxes, every concentrating on a various performance characteristic. The CZPT simple line is an excellent place to start your analysis into planetary gearboxes. In addition to its efficiency and flexibility, this gearbox has a host of modular functions.
The Helical planetary gearbox has numerous rewards. It is flexible, lightweight, and easy to keep. Its construction brings together a sunlight equipment and a earth equipment. Its teeth are organized in a way that they mesh with every single other and the sun equipment. It can also be employed for stationary programs. The sunshine gear holds the carrier stationary and rotates at the fee of -24/sixteen and -3/2, based on the number of teeth on every single gear.
A helical planetary gearbox can minimize sound. Its form is also smaller sized, reducing the dimension of the program. The helical gears are normally quieter and run more effortlessly. The zero helix-angle gears, in distinction, have smaller sized dimensions and larger torque density. This is a reward, but the latter also boosts the existence of the program and is much less expensive. So, even though the helical planetary gearbox has several benefits, the latter is suggested when place is limited.
The helical gearbox is far more efficient than the spur equipment, which is constrained by its lack of axial load component. The helical gears, on the other hand, produce significant axial forces in the equipment mesh. They also exhibit much more sliding at the points of tooth get in touch with, incorporating friction forces. As such, the Helical planetary gearbox is the favored choice in servo applications. If you happen to be searching for a gearbox to lessen sounds and increase performance, Helical planetary gearboxes are the right choice.
The major distinctions in between the two kinds of planetary gears can be discovered in the design and style of the two outer rings. The outer ring is also known as the solar gear. The two gears mesh jointly in accordance to their very own axes. The outer ring is the planetary gear’s provider. Its weight is proportional to the part of the ring that is stationary. The carrier sets the gaps amongst the two gears.
Helical gears have angled teeth and are best for purposes with substantial loads. They are also incredibly durable and can transfer a higher load. A standard Helical gearbox has two pairs of teeth, and this assures easy transmission. In addition, the improved get in touch with ratio qualified prospects to lower fluctuations in mesh stiffness, which indicates far more load ability. In conditions of price, Helical planetary gears are the most reasonably priced gearbox variety.
The outer ring equipment drives the internal ring equipment and surrounding planetary components. A wheel generate planetary gearbox may possibly have as much as 332,000 N.m. torque. An additional frequent kind of planetary gearbox is wheel drive. It is related to a hub, but the outer ring gear drives the wheels and the sunshine gear. They are usually mixed in excess of a housing to optimize size. One particular-stage Helical gears can be utilized in bicycles, even though a two-phase planetary equipment technique can handle up to 113,000 N.m. torque.
The style of a helical planetary geartrain is complex. It must comply with a number of constraints. These constraints relate to the geometrical relationship of the planetary geartrains. This review of the feasible design room of a Helical geartrain utilizes geometric layouts. The ring equipment, sunshine, and ring gear have no effect on the ratio of the planetary transmission. Nonetheless, helical geartrains are a excellent option for several apps.
planetarygearbox

Spur equipment planetary gearbox

The combination of planetary gears and spur gears in a transmission technique is known as a planetary or spur gearbox. Both the planetary gear and spur gear have their personal characteristics and are employed in numerous sorts of autos. They function in a related way, but are created otherwise. Listed here are some critical variances among the two types of gears. Detailed beneath are some of the most critical variations between them:
Helical gears: As opposed to spur gears, helical gears generate significant axial forces in the equipment mesh. They also characteristic greater sliding make contact with at the point of tooth get in touch with. The helix angle of a gearbox is typically in the variety of fifteen to thirty levels. The higher the helix angle, the more axial forces will be transmitted. The axial power in a helical gearbox is higher than that of a spur equipment, which is the cause why helical gears are far more efficient.
As you can see, the planetary gearhead has numerous versions and apps. However, you ought to consider treatment in deciding on the variety of tooth for your planetary equipment program. A five:1 spur gear push ratio, for illustration, implies that the sunlight equipment demands to comprehensive five revolutions for every single output carrier revolution. To attain this, you are going to want to choose a sun gear with 24 teeth, or 5 mm for every revolution. You may need to have to know the metric units of the planetary gearhead for it to be compatible with diverse types of devices.
An additional important characteristic of a planetary gearbox is that it doesn’t need all of the spur gears to rotate about the axis of the drive shaft. Alternatively, the spur gears’ interior teeth are fastened and the generate shaft is in the identical direction as the output shaft. If you select a planetary gearbox with fastened inside teeth, you’ll need to make certain that it has adequate lubrication.
The other significant distinction between a spur gear and a planetary gearbox is the pitch. A planetary gearbox has a higher pitch diameter, even though a spur equipment has reduced pitch. A spur gear is ready to deal with higher torques, but is not as productive. In addition, its increased torque capacity is a large disadvantage. Its performance is comparable to that of a spur gear, but it is much significantly less noisy.
One more big difference in between planetary and spur gear motors is their cost. Planetary equipment motors have a tendency to be far more expensive than spur gear motors. But spur gears are less expensive to make, as the gears themselves are smaller sized and simpler. Nevertheless, planetary equipment motors are more efficient and effective. They can take care of decrease torque purposes. But every equipment carries a fastened load, restricting their torque. A spur equipment motor also has fewer interior frictions, so it is usually suited for lower torque purposes.
An additional variation amongst spur gears and planetary gears is their orientation. One spur gears are not coaxial gearboxes, so they’re not coaxial. On the other hand, a planetary gearbox is coaxial, which means its enter shaft is also coaxial. In addition to this, a planetary gearbox is produced of two sets of equipment wheels with the identical orientation. This provides it the ability to attain concentricity.
One more difference between spur gears and planetary gears is that a planetary equipment has an integer variety of tooth. This is crucial because each gear should mesh with a sunshine equipment or a ring gear. Moreover, each and every world must have a corresponding amount of enamel. For every single world to mesh with the sunshine, the tooth have to have a specified length apart from the other. The spacing amongst planets also matters.
Besides the dimensions, the planetary gear system is also acknowledged as epicyclic gearing. A planetary equipment program has a sun equipment in the heart, which serves as the enter gear. This gear has at least 3 driven gears. These gears engage with every single other from the inside and type an inner spur gear style. These gear sets are hugely resilient and ready to modify ratios. If preferred, a planetary equipment prepare can be converted to yet another ratio, thereby maximizing its performance.
An additional essential variation between a spur gear and a planetary gearbox is the kind of enamel. A spur equipment has enamel that are parallel to the shaft, while a planetary equipment has enamel that are angled. This kind of gear is most suited for minimal-velocity applications, where torque is essential to shift the actuation item. Spur gears also create noise and can harm gear enamel due to recurring collisions. A spur gear can also slip, stopping torque from achieving the actuation item.

China Best Sales Udl Series Speed Variator for AC Electrical Motor     with Best SalesChina Best Sales Udl Series Speed Variator for AC Electrical Motor     with Best Sales