How do we choose power source module in power source design, so the premise of the choice is, we must know all sorts of power source, understand the distinction of all sorts of power source, in that way we just can choose power source module correctly.

 

Imitate power source introduces

 

 

Imitate power source: Namely transformer power source, will come true through core, coil, the v/LIT all over the ground number of coil decided the voltage of two end is compared, the action of core is to deliver metabolic magnetic field, (Our country) the magnetic field that masterstroke circle produced to change below 50HZ frequency, the magnetic field of this change delivers deputy coil through core, produced inductive tension in deputy coil, then transformer implemented the change of voltage.

 

The defect of imitate power source: Itself of coil, core is conductor, so because flow and the meeting in the course that they are changing voltage gives out heat from electrification (loss) , the efficiency of transformer is very so low, won’t exceed 35% commonly.

 

Sound equipment meritorious service puts in the application of transformer: High-power result puts need transformer to offer more power output, so, only those who carry coil v/LIT all over the ground number increase, of core bulk increase will come true, the addition of v/LIT all over the ground number and core bulk can accentuate its loss, so, what the transformer that high-power result puts must do is very big, can bring about so: Cumbersome, calorific amount is large.

 

Switch power source introduces

 

Switch power source: Before electric current enters transformer, pass the switch function of transistor, normally us the voltaic frequency of 50HZ promotes number HZ, below so tall frequency, frequency of magnetic field change also achieves tens of thousands of HZ, so, can reduce coil to circle bulk of number, core obtains same voltage to change than, as a result of bulk of coil v/LIT all over the ground number, core decrease, loss is reduced greatly, efficiency of general switch power source is achieved 90% , and what bulk can do is very small, and output stability, so switch power source has the good point that imitate power source reachs hard.

 

(Switch power source also has his inadequacy, if output voltage to have ripple and switch noise, linear power source is done not have)

 

Sound equipment – result the application of power source of the switch in putting: The description of switch power source has indicated the dominant position of switch power source in the process, so even if high-power result is put, what can do like switch power source is very careful, cabinet, at present digital meritorious service of home puts the digital meritorious service with company of equipment of sound of number of Shenzhen Cui Paasche most banner, they had developed T at present kind pure number meritorious service is put, and issue generation S kind result in putting ongoing also hair, specific consult as follows please data:

 

Digital power source introduces

 

Using easily simply, the applied circumstance with parameter change not much requirement, product of imitate power source has an advantage more, the specific aim that applies because of its can come true through hardware solidify, and in can control an element rate of response of more, real time faster, need of source control of report of many imitate system, in complex high-powered system application, digital power source has an advantage. In addition, in intricate much system professional work, relative to imitate power source, digital power source is the application that will realize many sided through software process designing, its have but expansibility and repeat use sex to make the user can go to the lavatory change working parameter, optimize power source system. Cross voltaic protection and management through real time, it still can reduce the amount of periphery parts of an apparatus.

 

In intricate much system professional work, relative to imitate power source, digital power source is the application that will realize many sided through software process designing, its have but expansibility and repeat use sex to make the user can go to the lavatory change working parameter, optimize power source system. Cross voltaic protection and management through real time, it still can reduce the amount of periphery parts of an apparatus.

 

Digital power source is useful DSP pilot, return useful MCU pilot. Comparatively, DSP pilot power source uses means of digital filter wave, relatively MCU pilot power source can satisfy rate of response of complex power source demand, real time more performance of stabilized voltage of faster, power source is better.

 

Digital power source has what profit it is programmable above all, for instance communication, detect, usable software process designing realizes all functions such as telemetering. Additional, digital power source is had high-powered with high reliability, very agile.

 

Interference: Odd between a number in machine and imitate, because digital signal is the pulse signal with very broad spectrum, because this basically is digital part,very strong to the interference of imitate part; uses digital power source and imitate power source commonly not only join with filter between apart, both, in a few requirements taller circumstance, for example certain sheet piece when the AD converter of machine interior undertakes AD is changed, often want to let digital part enter dormancy state, majority number logic quits the job, form interference in order to prevent them to imitate part. If interference is serious, can use two power source respectively even, went with inductance and capacitance segregation commonly. Also can mix the number on whole bat the power source of imitate part parts couplet is together, on the solder point that receives capacitance of wave of power source filter directly with the access that part. If antagonism interference demand is not high, also can receive together casually.

 

Sweet clew

 

(If 1) does not use the A/D of chip or D/A function, need not distinguish digital power source and imitate power source.

 

(If 2) used A/D or D/A, still need to consider to consult power source is designed.

 

Above is a few simple introductory imitate power source only, digital power source, the distinction of switch power source, want to become an engineer, want to learn more things of course.