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參數(shù)資料
| 型號： | AN1354 |
| 英文描述： | SINGLE-PHASE INDUCTION MOTOR DRIVE FOR REFRIGERATOR COMPRESSOR APPLICATION |
| 中文描述： | 單相異步電機驅動的冷柜壓縮機的應用 |
| 文件頁數(shù)： | 9/10頁 |
| 文件大?。?/td> | 118K |
| 代理商： | AN1354 |
APPLICATION NOTE
9/10
Case 1
(Hyst. Thres. = 5.3°C)
Case 2
(Hyst. Threh. = 4.2°C)
MEASURE
Compressor ON time
12' 50''
9' 10''
Compressor OFF time
16' 20''
15' 10''
Average power during
ON time
136 W
138 W
CALCULATION
Cycle period
29' 10''
24' 20''
Duty cycle
0.44
0.38
Average power
consumption
60 W
52 W
Table 1: Power consumption versus Hysteresis threshold
So, it is shown that reducing the temperature ripple improves the appliance efficiency. This is can be ex-
plained by the fact that the useful energy is not wasted in vain.
The Case 2 control law enables to save 8 W, just by reducing the threshold level by a little bit more than 1 °C.
For electromechanically controlled refrigerators, where the temperature ripple is in the range of 10-20 °C, a
decrease down to a few degree Celsius, will enable to save up to 20 % of energy consumption. This means
a 18 W saving for a 140 W compressor (90 W average power with a 2/3 duty cycle).
Reducing the temperature ripple changes the compressor behavior. The motor running cycle frequency is
increasing. In our example, this frequency increases by around 20 % (2.06 cycles per hour with Case 1, and
2.46 cycles per hour with Case 2). This is not a problem for electronic switches where the cycle length of life
isfarfromthepoorcapabilityofelectromechanicalswitches.Forthemotorpointofview,thehighernumber
of cycles should not reduce its reliability as:
I
Its temperature ripple is decreased thanks to a higher cycle frequency
I
The start winding conduction length is reduced thanks to an electronic control instead of a thermal-active
solution (PTC)
I
An overcurrent protection is ensured by the MCU, that reduces the motor stress.
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0:40:00
1:00:00
1:20:00
Time
T
0
50
100
150
200
P
Evap.
Cab.
Power
Fig. 11 Temperature control (Case 1)
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| AN6562) | Voltage-Feedback Operational Amplifier |
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| AN1358 | 制造商:PANASONIC 制造商全稱:Panasonic Semiconductor 功能描述:Dual Operational Amplifiers |
| AN1358S | 制造商:Panasonic Industrial Company 功能描述:IC |
| AN1358S(AN6562S) | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Voltage-Feedback Operational Amplifier |
| AN1358S-E1 | 制造商:Panasonic Industrial Company 功能描述:IC |
| AN136 | 制造商:Panasonic Industrial Company 功能描述:IC |
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