Transducer is technology of applied frequency conversion and microelectronics technology, the electric power that through changing electric machinery means of frequency of working power source controls AC motor controls device. Transducer is main by rectification (communication becomes straight to flow) , filter wave, inversion (dc changes communication) , the composition such as unit of small processing of unit of apply the brake, driving unit, detecting element. Transducer relies on the leaves to adjust output power supply voltage of in-house IGBT and frequency, will offer the power source voltage that its need according to the real need of electric machinery, achieve the goal of energy-saving, timing then, additional, transducer still has a lot of protection functions, if flow too, press too, overload protection is waited a moment. As industrial automation degree rise ceaselessly, transducer also received very wide application.

 

 

Choose the type of transducer, the requirement according to precision of speed of scope of the type that produces machine, timing, static state, starting torsion, decide the transducer that chooses the sort of control way is the most appropriate. Alleged and appropriate it is to be close friends already with, want economy again, in order to satisfy the postulate of craft and production and requirement.

 

 

 

Of electric machinery extremely several. Commonly electric machinery pole is counted with not over (extremely advisable, otherwise transducer capacity is about to be increased appropriately. Torsion character, critical torsion, quicken torsion. Below circumstance of power of coequal electric machinery, opposite at mode of tall overload torsion, transducer norms can fall the forehead is chosen. Electromagnetism compatibility. To decrease advocate electrical interference, when using reactor can increase in inter circuit or transducer input, or the buy before installation keeps apart transformer. When exceeding 50m with transducer distance when electric machinery commonly, should be among them string enter reactor, filter or use screen to defend cable.

 

 

Systematic efficiency is equal to the product of transducer efficiency and electromotor efficiency, when only both leaves the job at taller efficiency, criterion systematic efficiency talent is higher. Set out from efficiency angle, when choosing transducer power, want to notice the following:

 

When transducer power worth and electromotor power worth match the most appropriate, run below high efficiency cost with benefit transducer.

 

Classification in the power of transducer classification with electromotor power not identical when, criterion the power that the power of transducer wants to be close to electromotor as far as possible, but the power that should be more than electromotor slightly.

 

Belong to when electromotor start often, apply the brake works or be in burden to start and when more frequent job, can choose big the transducer of one class, in order to use transducer long-term, move surely.

 

Classics test, real power has electromotor really have more than needed, can consider to choose power to be less than the transducer of electromotor power, but should notice whether electric current of instantaneous peak value can have caused electric current to protect a movement.

 

When transducer is not as identical as electromotor power, must adjust the setting of energy-saving program accordingly, achieve taller energy-saving result with benefit.

 

 

 

The casing structure of transducer should suit with ambient conditions photograph, must consider the factor such as temperature, humidity, dust, acid-base value, caustic gas namely. Common have following type of a few kinds of structures can choose for the user:

 

Open wide model IPOO itself does not have box, applicable outfit is in electronic-controlled inside box or electric and indoor screen, dish, frame on, especially when much stage transducer is used centrally, it is better to choose this kind of type, but ambient conditions asks taller; closes model IP20 applicable and general use, the circumstance; that can have a few dust or a few temperature, humidity is sealed model the environmental; with poorer condition of spot of IP45 applicable industry is airtight model IP65 applicable ambient conditions is poor, have the situation of water, dirt and certain caustic gas.

 

 

Reasonable capacity choice itself is a kind energy-saving fall bad news measure. The basis has data and experience, simpler method has 3 kinds:

 

Real power sends electric machinery certainly. Determine above all the real power of electric machinery, will choose the capacity of transducer with this.

 

Formulary law. Use at much stage electric machinery when a transducer, should satisfy: ? Does distant Xi  throb with terror and does Jian of Si of  of stern of  of  of anxiety ǖ Duo flinch postscript Yu  member ⅰ of  of Xiao of  of Bei of acenaphthene Jue Gan Deng?

 

Electric machinery is rated voltaic law transducer. Process of transducer capacity make choice of, be a transducer and electric machinery actually is optimal match a course, the commonnest, safer also is to make the capacity of transducer is more than or the rated power that is equal to electric machinery, but how much to want to consider the real power of electric machinery and rated power to differ in matching actually, it is equipment place chooses ability to slant normally big, and the capacity of real need is small, because this presses the real power of electric machinery to choose transducer,be reasonable, the transducer that avoids to choose is too big, make investment increases.

 

To light load kind, transducer electric current should be electromotor by 1.1N(N commonly rated electric current) will choose, or the power of covers suitably with the output power rating of transducer the biggest electric machinery that indicates in the product by manufacturer will choose.

 

 

Power source voltage reachs wave motion. Should protection of low voltage of special attention and transducer rectifies the photograph that decide a value to suit, in because be in,be being used actually, the possibility of on the low side of voltage of electrified wire netting is larger.

 

Advocate wave motion of power source frequency and harmonic interference. The interference of this respect can increase the hot loss of transducer system, bring about noise to increase, output is reduced.

 

When transducer and electric machinery are working, the power of oneself is used up. Having a system advocate when power source power supply is designed, both power uses up an element to should consider to go in.

 

Mastered these basic transducer to choose a technology, homebred transducer rises abruptly stage by stage. Now already gradually market of high end of race to control. Shanghai and Shenzhen become the forward position that homebred transducer expands, emerge in large numbers went out to resemble collecting plain transducer, Ying Wei vacates a batch of famous and homebred transducer such as transducer, An Bangxin transducer, Ou Rui transducer.