For different motors, the methods used are not the same, but also with the motor manufacturers equipped with test equipment has a greater relationship. Today we will determine the efficiency of the method of generalized run through, a little open the background of energy-saving emission reduction policy of the hottest words "efficiency" of the veil of mystery.
A method is called "direct determination of efficiency", often referred to as "input - output method", because the test can be directly obtained to obtain the efficiency of the two data - input electric power and output mechanical power, so called. It is also known as the "Input-Output Method" because the test can directly obtain two data for efficiency - input electric power and output mechanical power.
Method B - input-output ဆုံးရှုံးမှုခွဲခြမ်းစိတ်ဖြာနည်းလမ်း
B method is called "input-output loss analysis method", is the efficiency of the motor for efficiency certification (mainly assess the efficiency of high-efficiency motors), requires the use of a kind of efficiency test method. GB18613 on the efficiency of the test to make specific requirements.
B method to find the efficiency of the rated voltage and rated frequency under direct load test and no-load test to obtain a number of groups of input current, output power, output power (or torque), speed, and core loss and mechanical loss values, and then the relevant test values of the relevant corrections (mainly for the temperature correction of the thermal losses and the correction of the output torque) and find the corrected input power and output power, and finally Finally, the output power compared with the input power to find out the efficiency of the test points, and draw the efficiency and output power of the relationship between the curve, in the curve to check the rated output power when the efficiency value, that is, the "full load efficiency".
C နည်းလမ်း - တုံ့ပြန်ချက်နည်းလမ်းကိုဆွဲယူရန်စက် - စက်
C method test, with a same specification or different specifications but synchronous speed and the same motor being tested, the power is not less than the motor being tested other three-phase asynchronous motor (customarily referred to as "accompanying motor") and the motor being tested with a coupling connection. The motor under test is connected to a power supply of rated frequency; the test motor is connected to a power supply of variable frequency (whose frequency is adjustable within the range of at least 90%-110% of its rated value).
In the test, there is always a motor running as an asynchronous generator, the output of which is fed back to the grid or to another motor via a variable frequency power supply (unit or electronic). This is referred to as the "feedback method".
(1) motor no-load test မှ core loss နှင့် mechanical loss တို့ကို ရရှိသည်။
(2) သတ်မှတ်ထားသော အပူချိန်တွင် ပုံသေသတ်မှတ်ထားသော rotor ကြေးနီဆုံးရှုံးမှုသတ်မှတ်ခြင်းနည်းလမ်း C နည်းလမ်း။
(၃) Load stray loss determination method ကို အောက်ဖော်ပြပါ ပြဋ္ဌာန်းချက်များနှင့်အညီ E method ကို တိုင်းတာသင့်သည်၊ E1 နည်းလမ်းကို တန်ဖိုးကို အကြံပြုရန် အသုံးပြုသင့်သည်။
f method - ညီမျှ circuit နည်းလမ်း
Equivalent circuit calculation method, is based on the motor no-load and plugging test part of the data, the use of motor equivalent circuit in the related parameters between the indirectly, the motor efficiency and the other parts of theဝိသေသလက္ခဏာများရရှိရန်, ဒေတာ, သည် သုံးဆင့် ပြတ်တောက်နေသော မော်တာများ၏ ထိရောက်မှုကို သွယ်ဝိုက်ရယူသည့် နည်းလမ်းများထဲမှ တစ်ခုဖြစ်သည်။
This measurement method is the "reduced voltage load method" and is one of the indirect methods for measuring efficiency. It is used when the power supply or load capacity does not allow full voltage and full load testing.
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