How to Use PWM Speed Control to Improve Efficiency of Cooling Fans
With faster and more powerful ICs being designed into smaller, more densely packed form factors, the heat these ICs generate becomes a serious issue that can no longer be resolved with passive cooling solutions alone. For many applications, the next level in thermal management involves active cooling with the use of high-performance, brushless DC Cooling Fans.
Engineers select a fan based on “worst-case scenarios.” In other words, when the system is running at peak usage and a fan(s) fails, the system must be designed to compensate for the loss of a fan(s). To do this, engineers must design in a higher-performing fan than is required.
Once a fan with the required airflow has been identified, engineers must also consider the noise generated by the fan, the power the fan consumes, and the life of the fan. Since all of these variables are a function of the fan speed, the ability to control the fan speed using PWM speed control allows the system to balance these variables based on the thermal load at any given moment.
1. The Basics: What is PWM Speed Control?
A PWM signal is generated by the host system and sent to the fan’s internal IC via a lead wire attached to the fan. This signal consists of a repeating pattern of square wave pulses. The pulses are square because the signal is either instantaneously high (on) or instantaneously low (off). See Figure 1.
Figure 1- A PWM signal consisting with a 10 square wave pulses per second
The PWM signal is defined by two parameters: the frequency (f) and the duty cycle (%).
The frequency (f) is constant and is measured in hertz (Hz). It refers to the number of pulses per second. Figure 1 has a frequency of 10 Hz.
The duty cycle is calculated as the percentage of time that a single pulse is in a high state (on) relative to the length of time the pulse lasts. See Figure 2.
Figure 2 – A single pulse lasting 0.1 seconds, in a high state for 0.05 seconds.
The duty cycle is calculated as: (.05 )/(.1 ) = 50%
The underlying principle of PWM is that the fan speed will vary linearly with the duty cycle. By varying the duty cycle of the signal (modulating the width of the pulse), the fan speed can be varied. SANYO DENKI fans are designed for use with a standard 25kHz PWM signal frequency.
Let’s look at how using PWM to vary the fan speed affects the airflow, power consumption, and noise of the fan.
2. Advantages of Using Fan Speed Control
While a fan is rotating at full speed to remove the heat generated by a system at full capacity, the fan is also producing the maximum amount of noise and consuming the maximum amount of power. When a system is running at nominal, the fan can be throttled back to lessen the airflow, noise generated and power consumed.
Dimensional analysis can be used to illustrate the dramatic effect lowering a fan speed (N) can have on the flow rate (Q), noise (S), and power (W).
2.1 Airflow (Q)
As mentioned previously, the airflow increases linearly with the fan speed. If the fan speed is decreased by 25%, the airflow decreases by 25%. This linear relationship can be seen in Figure 3.
Figure 3 – illustrates the relationship between fan speed and airflow (Q).
The relationship is given by the equation: Q = N
2.2 Noise (dB's)
Figure 4 illustrates the logarithmic relationship between the fan speed and the sound pressure the fan generates. Again, the noise generated by a fan is also not linear. If we decrease the fan speed by 25%, we know the airflow will drop by 25% and the power will drop by 60%, and now we know the noise will drop by approximately 6 dB. The general rule of thumb is, that for every 3 dB the sound pressure drops, a fan will subjectively sound about half as loud.
Figure 4 illustrates the relationship between the fan speed, sound pressure, or noise the fan generates. The relationship is given by the equation:
Δ dB = 10 log(N2/N1)5
2.3 Power (W)
The power a fan consumes vs the speed the fan rotates is not a linear relationship. Figure 4 illustrates the parabolic relationship between the fan speed and the power the fan consumes. To reiterate, while a linear fan speed drop will correlate to a linear airflow drop (e.g., 25% lower Q and N), the power would drop by 60%.
Figure 4 – illustrates the relationship between fan speed and power consumed by the fan.
The relationship is given by the equation: W = N^3
3. Summary: PWM Control is the Tool to Balance Variables
As today’s systems continue to get more powerful, smaller, and denser, the demand for higher airflow fans increases. When designing in the right fan, design engineers must balance the airflow requirements within their system with the power requirements to run the fans and the noise constraints of their particular application. PWM is a tool that allows engineers to balance these variables based on the demands put on their system at any given time.
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本文由玄子转载自SANYO DENKI Official Website，原文标题为:How to Use PWM Speed Control to Improve Efficiency of Cooling Fans，本站所有转载文章系出于传递更多信息之目的，且明确注明来源，不希望被转载的媒体或个人可与我们联系，我们将立即进行删除处理。
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SANYO DENKI（山洋电气）San Ace 散热风扇选型指南
描述- Products are made of high-quality materials and undergo rigorous quality assurance testing. They are designed and manufactured by experienced engineers and professionals to achieve high reliability.
型号- 9BFB 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109BC12FA7-1 Index by Model No./Safety Standards List - DC Fans Standards and Certifications
型号- 109P0524H7D01,9G0824P1G04,9GV0612P1G03,9G0948H2021,9G0924M2D011,9GA0412P3M011,109P0812M7D01,109R0812S4D011,9HV0812G10021,9GA0924J4021,9LG0612H4001,9WL0812G4D001,9G1212F4D01,9LG0612H4002,9GA0524P7G001,9LG0824S4002,9LG0824S4001,9G1212A4021,9A0924H401,9A0924H402,9G0948H2011,9HV0812G10011,9A0612H4011,9GL1248F102,9GA0624M6002,109P0424F3023,9GA0624M6001,9GE0412P3J03,9GL1248F101,9GV0912P1G031,9A0824S4011,109R0805M4011,9LG0912F4002,9LG0912F4001,9GV1224P1J011,9A0924S402,9A0924S401,9AH0812P4G04,9GA0924J4011,9WL1412A5D001,9S0612F402,9S0612F401,9G1212A4011,9WL0812P4H001,9GA0412P3K01,9GA0924H4D011,9WS0924F402,9CRD0412P5M03,9WL0948P1H601,9GA0624P1K031,9WP0848S4D011,109P0424F3013,9WS0924F401,9GA0812G4001,9G0812P1K081,9GA0812G4002,9GA0924P4S03,9A0824S4021,9GP1224P1G001,9G1224F4D011,9GA0924M401,109P0824M6D01,9GA0924M402,9GV1448P1S001,9A0612G4D011,9G1248P1G041,9GA0824P7G001,109R0812G4D01,9A0624F4D01,9A0912M402,9GA0412M3D01,9A0912M401,109P1412M10,9A0612M4D01,109L1724M501,109L1724M502,9GV0612P1G031,9GV1448P1H001,109R0624H4D011,9GV1248P4G01,9G1224E1D01,9GA0912P4J031,9GA0412H301,9GA0412H302,9GV1248J1021,9GV1524M502,9GA0412H3021,9GV1524M501,9WP0612G4D01,9GA0612J1011,9A0812G401,9WV0924P1H001,109P0412M601,9A0824M401,9A0824M402,9S0612P4M01,109P0412M602,9G1224G4011,109P0624H6D01,9G1248F1D01,9GV1248J1011,109P0624W6D01,9G1248F101,9GA0412H3011,109R0648J401,109R0648J402,9LG0912P1F001,9WP1212H101,9WP1212H102,109P0824M602,9G1248M4D01,9GA0612J1021,109P0824M601,9A0812G402,9GV1224G401,9GA0912F4D011,9GV1224G402,109P0505M7D01,9G0612H4D0011,9WL0612J4D001,109P0412M3013,9G0912S2D01,9GT0924P1M001,9G0612S40021,9G1224G4021,9G1224G1D011,9GA0824P4G0011,9A0912H4021,9A0612H4021,9GA0424J3D001,9WP0824H4D011,9HVA0812P1G001,109P0612H7D01,9WP0924H4011,9G0912P1G03,9GV0812G1021,9G1212G1011,9GA0924W4021,9WP0624H4011,109P0412M3023,109R0624G4011,9G1224M1021,9GL1212F1D01,9A0912H4011,9GA0912G402,9A0812M4D011,9LG0812P4G001,9GA0912G401,9WG1212E101-E,109P0605M702,109P0605M701,9G1212G1021,9GV0812G1011,9LG1224S1D001,9LG1412P1H001,109P0405M602,9G1212F101,9G1212F102,9G1248G401,9WP0624H4021,9G1248G402,109P0405M601,9GA0924W4011,109R0624G4021,9G1224M1011,9GA0612P1H031,9WL0924M4001,9WL0924M4002,109R0648H4011,109E4724F401,9GV0848G102,109P0512M7D01,9GV0412K301,9GV0412K302,109R0605H4021,9S0912P4F011,109P1348H1D01,9G0648P4S0011,109P0624S702,9LG0824F4D001,9CRA0948P0G601,9GA0812P1H61,9LG1424P5S001,109R0824F401,9GA0924H4011,9LG1412A5001,109P0624S701,109R0824F402,9LG1412A5002,9G1224A4D01,109P0612M702,109P0612M701,9GA0712P1H0011,9G0924M202,9L0412M3D01,9S0812H4011,9WP1248H102,9WP1248H101,9WL1412P1M001,9WG1248F102-E,9WS0824M4D01,109R0648H4021,9WP1212L101,9G0612S4002,9GA0612P,9CRE0412J502,9G0948G1D01,109P0624H701,109P0624H702,9A0624S4D01,9G0612S4001,109P1348S1D01,9GV1224G4021,9HV1248H1002,9A0824F402,9HV1248H1001,109P0412K3023,9A0824F401,9GA0824L2002,9GA0924H4021,9GA0824L2001,9A0624H4D01,9WG1248M102-E,9GA0612L9001,109R0824M4D01,9GA0612L9002,9GA0412K3D01,9GA0612H1021,109R0824G4D011,109P0612B702,9GA0524M7002,9S0812M4D01,9GA0812S2001,9GV1524M5011,9GA0524M7001,109L5748M502,109L5748M501,109P0612B701,9BMB24P2H01,9G1248F102,9G0848G1021,9BD24FA6-1,9GA0812H1621,9GV1212J1D01,109P0412K3013,9GT0612G4D001,9GA0924M4D01,9GT0912J4002,9LG0912S4001,9G0948H102,9G0948H2D011,9GA0412H3D011,9LG0912S4002,9G0948H101,9EC2024H0D01,9LG0924L4002,9WG1212G102-E,9LG0924L4001,9S0912M402,9GA0612H1011,9S0912M401,9GT0912J4001,9GV1212P1G011,9GA0612L9D001,9GV1224P1H01,109E4724F402,9GV0848G101,9WP0624G401,9PH0412P3J013,109R0605H4011,9WP0624G402,9GV0624P1G031,9G1212H4D01,9GA0812H1611,9G0924G1D011,9GA0312K3001,9GA0424H6001,9GA0424H6002,9WP0812H4D01,9G0848G1011,9LG1424M5002,9A0824F4021,9LG1424M5001,9WP0924F402,9WP0924F401,9GV0312G3011,9GV0812G102,9LG0824M4D001,109R0612P4J03,9GV0312K3D011,9GV0812G101,9GA0612P6G001,9G0812K1021,9G0812P1H03,9G1248H4021,9GA0612J102,9GA0612J101,9GV0412G3D01,9LG1448M1D001,9G0912H101,9GA0612P7H01,9G0912H102,9LG0924P4H001,9B1TS48P0H001,9WP0812H4D011,109R0848K4021,9WP0924F4021,9A0824M4D01,109R0848K402,9A0824H4D011,109R0848K401,109P0424H602,9LG1448H5002,9LG1448H5001,9LG0912L4D001,9LG0924P1F001,109P0424H601,9A0824F4D011,9A0924F4D01,9CRE0412P5J03,9G1224M4D011,9CRA0312K402,109P0612M6D01,9G0812K1011,109R0612S4D01,9G1224F402,9G1224F401,9A0812M4021,9GA0612M6D001,9WG1248E1D01-E,9G0948A2D011,109R0848K4011,109P0424G3D013,9A0912G4D011,9GV0812P1M03,9GV0812P1M031,9LG0924P4S001,9GV0948P1H03,9GA0412H7002,9GA0412H7001,9A0912M4D01,109R0824H4021,9A0912F4011,109P0405H6D01,109R0612P4J061,9A0812M4011,9G0624H1D01,9WG1224E101-E,109R0805M4021,9WP0624J4011,9CRA0412J402,9CRA0412J401,9LG1212M1002,9LG1224F1001,9GA0512A7002,9GV0948P1F031,9GA0512A7001,9G1224E102,9G1224E101,9GV0312G3021,9LG1212M1001,109R0824H4011,9A0912F4021,9GV1248H402,9G1248H4011,9GV1248H401,9GL1224E102,9GL1224E101,9G1224H4D011,9WS0924M402,9GA1224P4G0011,9WS0924M401,9A0824M4D011,9GA0924F401,9LG0824P4G001,9LG1224F1002,9GA0924F402,9S0612M401,9WP0924F4011,9A0824F4011,9S0612M402,9GA0924P4J031,109R0812S401,9LG0912S4D001,109R0812S402,9GA1248P4S001,9WL1448M1001,9G0948S2021,9G
SMART BEV THERMAL MANAGEMENT
型号- MLX90380,MLX90819,MLX81344,MLX81325,MLX91208,MLX81330,MLX91221,MLX92212,MLX92211,MLX90510,MLX90411,MLX90830,MLX90412,MLX91220,MLX90395,MLX81310,MLX81332,MLX81315,MLX91218,MLX90328,MLX81340,MLX90363,MLX90421,MLX90422,MLX90820,MLX91216
SANYO DENKI（山洋电气）冷却系统/电力系统/伺服系统产品选型指南
型号- SANUPS P73J,9AT2560C-000□,SANUPS P73H,SMC100-B,SMC100-A,SANUPS E11A-LI,SANUPS P73L,9CT1-P,SMC520,9CT1-T,SANUPS N11C-LI,SANUPS A11M-LI,SANUPS A13A,SANUPS K33A,SANMOTION,SANUPS W73A,SANMOTION F3,SANMOTION F2,SANUPS E33A,SANUPS C23A,SANMOTION C S200,SANMOTION F5,SMC200-A,SMC200-B,SANUPS N11B-LI,9CT1-U001,SANUPS A22A,SANUPS A11N-LI,SANUPS P83E,SANMOTION R,SANUPS D11A,SANUPS A11N,SANUPS A11M,SANMOTION K,SANMOTION MODEL NO.PB,SANUPS A11K,SMC507,SANUPS A11J,SMC505,SANUPS S11A,SANUPS A11K-LI,SANUPS A23D,SANUPS A23C,SANUPS M53A,9AT2560A-000□,SANUPS K23A,9CT1-A,SANUPS E23A,SANMOTION C S500,SANUPS E11B,SANUPS E11A,9AT2560S-000□,SANUPS G53A,SANUPS E11B-LI,9CT1-001,SMC-USBW-01,SANMOTION C S100,9CT1-002,SANUPS T,SANMOTION G,SANMOTION C,SANUPS K23A M TYPE,9AP1600-1,SANUPS RMA
Littelfuse（力特）集成电路选型指南
目录- Products overview Solid State Relays Introduction Gate Drivers Introduction High Voltage Isolated Analog Switches/Optocouplers/MOSFETS Introduction Non-Volatile Digitally Programmable Capacitors/High-voltage LED Drivers Introduction Multifunction Products/Voltage Monitoring & Sensing IC Introduction Solid State/Optically Isolated Power Relays Optically Isolated AC Power Switches Gate Drivers & Linear/Standard Optocouplers Depletion Mode MOSFET and Telecommunication/Multifunction Products Global Lab Capabilities
型号- LF2136BTR,LF2113BTR,IXD_614CI,CPC1225N,IAD110P,CPC1019N,IXD_609PI,ITC135P,CPC1335P,CPC3960Z,TS190PL,IAD110,LAA120,LF2113B,LAA127,PAA150,LAA125,CPC1006N,CPC1018N,LF2101N,PAA190S,CPC3720C,PBB190,LBA127P,LCA120LS,LBA127L,LAA110,CPC1114N,CPC1017N,LBA127S,PLB190S,CPC1394GR,LBB120,PAA191S,LF2104N,LBB126,LBB127,CPC2317N,IXD_602D2,IX4340N,LAA100,CPC1125N,CPC1004N,CPC1016N,PBA150S,CPC1394GV,LAA108,CPC1786J,CPC3710C,LBB110,CPC1966BX8,IXD_630MYI,LF2103N,LBA127LS,LCC120,LCA182,LF2388B,PLA192S,XAA170P,TS190LS,XAA170,LF2190NTR,LF2110B,CPC1393GR,CPC7524,PLA110LS,CPC7695Z,PLA193S,CPC1981Y,IXD_604SIA,CPC1002N,LBA120P,CPC1014N,CPC1135N,LBA120S,PAA191,LBA120L,CPC1788J,PAA190,CPC1393GV,PAA193,CPC1510G,IXD_609SI,LF2113,LF2110,LCB710S,LF2136B,TS117PL,CPC1231N,CPC1001N,CPC1025N,CPC1983B,PAA140LS,CPC1777J,LBB127P,CPC3701C,LOC110,XBB170,IXD_630YI,LOC111,LOC112,LBB127S,PLA190S,CPC1511Y,LOC117,PLA191S,LCA110LS,LBA110L,CPC1983Y,CPC1230N,CPC1963GS,CPC7695B,LBA110S,CPC1972G,TS190,LBA110P,PLB171P,LF2304NTR,LBB126P,LBB126S,CPC3714C,FDA217,XAA170S,CPC1984Y,FDA215,TS120S,LF2136,TS120P,LAA100S,LAA100P,CPC1983YE,LCB716S,LAA100L,LAA120LS,LF2304N,LOC11X,XS170,CPC1593G,CPC2125N,OAA160,IAB110P,LAA110PL,CPC1918J,MXHV9910,LCA182S,CPC1330GR,CPC5622A,LCA129,LCA127,LCA125,CPC1510,CPC1511,CPC1906Y,CPC2017N,LCA120,PAA150P,LCA712S,CPC1907B,PAA150S,LAA110S,NCD2400M,LAA110P,XAA117,LF21904N,LAA110L,ITC117L,TS117LS,PS1201,XCB170,LOC112S,ITC117P,LCA110,LF2103,PAA140L,CPC1908J,LF2110BTR,CPC1560GS,PS2401,LOC111S,CPC1596G,LOC112P,CPC1330G,CPC1560G,LCA220,LCA100,PAA140P,LCA710S,LAA120PL,CPC1560S,PAA140S,CPC1909J,LAA120P,CPC5712U,LAA120L,CPC1593GS,LF2106N,CPC1561B,LOC110S,LOC110P,PAA193S,LOC111P,CPC5603C,OAA160S,OAA160P,FDA217S,LCA715S,LCC110P,CPC3980Z,LCC110S,LCC110,LAA120S,IX4310T,CPC3982T,CPC1943GS,FDA215S,XCA170,CPC5602C,LBA120,OMA160S,LBA127,LCC120S,CPC1106N,CPC1009N,CPC1333G,CPC1563G,LCB127,LCB126,LBA110,IAA110P,ITC137P,LCB120,LCA701S,IXD_604D2,LF21814N,LCB717S,CPC1117N,CPC1008N,CPC1540G,CPC3730C,LF2388BTR,LCB111,LCB110,PLA132S,LCB110S,LAA108S,CPC1727J,CPC1945G,CPC40055ST,LAA108P,PLA160,CPC1945Y,IXD_614SI,LF2104NTR,LCA127LS,XBB170S,CPC1580,XBB170P,PAA110L,CPC1966YX8,XAA117P,CPC1966YX6,XAA117S,LBA710S,LF21064N,PLA170,CPC5712,CPC1593,PAA110P,LF2181N,LF21904NTR,CPC1596,PAA110S,CPC1590,LBA716,LAA125PL,LCB120S,LAA100LS,CPC1393G,PLA140,CPC1705Y,PLA143,LBA710,LCA717S,LF2184N,CPC3909C,PLA140LS,PLA143S,CPC1718J,LCB717,LCB716,CPC1333GR,LCB710,CPC1394G,CPC1706Y,PLA150,IXD_602SI,NCD2100,OMA160,IX4351,LBA110PL,IXD_609SIA,CPC3909Z,LCB126S,PBB190S,LF2184NTR,XS170S,LCA210,CPC1540,LF2190N,IX4427N,IXD_609D2,IX4427M,LBA120LS,LF21844N,CPC1708J,IXD_609CI,LAA127S,CPC1563GS,LAA127P,LAA110LS,CPC1540GS,LAA127L,CPC2907B,LCA110S,CPC1926Y,TS190S,TS190P,CPC2025N,PLA132,TS190L,PLA134,IX4428M,CPC1590P,LCA110L,IX4428N,LAA100PL,CPC1927J,PLA110S,CPC1709J,LAA710,IXD_630MCI,CPC1596GS,PLA134S,PLA110L,CPC5621A,LOC117S,LOC117P,CPC1560,CPC3980,CPC2014N,CPC1563,LF2106NTR,IXD_614YI,LAA125S,PS2601,LAA125P,LCB111S,LAA125L,CPC2330N,CPC1916Y,CPC5620A,LCA120S,PLA110,PAA132S,IX4426M,IX4426N,LCA120L,CPC1580P,LCA100LS,PLA160S,IAA110,PLA172P,ITC117PL,LBA110LS,IX4340UE,CPC1035N,CPC1961G,CPC1779J,CPC9909,LCA125S,PM1204S,LCA210S,LF21844NTR,CPC3703C,LCA125L,PAA110PL,LAA710S,LCA210L,CPC1973Y,LBB120S,CPC1010N,LF2101NTR,CPC1986J,CPC1998J,XCB170S,CPC1964BX6,LBB120P,PLA194S,CPC1510GS,PLA170S,CPC1130N,CPC1972GS,PM1206S,CPC1963G,CPC1390GV,LAA127LS,PLB190,LCA220S,CPC1390GR,PLB150S,IXD_604PI,CPC1976YX6,XCA170S,PD2601,LF21814NTR,CPC1020N,CPC1964B,PLA171P,CPC1961GS,IX4351NEAU,LCB127S,CPC1988J,PM1205S,LCA210LS,IBB110,LCA100S,CPC7514,CPC7512,IXD_609YI,LCA100L,LBB110S,LBB110P,CPC1976Y,PLA140S,PLA140L,CPC1965G,ITC135,ITC137,PD1201,CPC1977J,PAA110,TS120,LCA129S,PBB150S,LF21064NTR,LCA125LS,PBB150P,CPC1965Y,PAA110LS,CPC1030N,CPC3902Z,CPC3708Z,CPC1966B,CPC1978J,CPC5622-EVAL-600R,IXD_630CI,PM1206,PM1205,PM1204,PBB150,CPC1966Y,IX4351NE,LF2181NTR,CPC3708C,PLA150S,CPC1150N,PAA127P,LAA127PL,PAA127S,TS118S,PAA140,CPC1967J,TS118P,CPC1979J,CPC1943G,LAA125LS,LCA717,ITC117,LCA715,LCA712,CPC2030N,LCA710,PAA132,PLB150,LCA127L,PBA150,IXD_602PI,IX4340NE,LCA127S,IAB110,IXD_602SIA,TS117S,LBA716S,LF2103NTR,TS117P,CPC1968J,TS117L,PD2401,LCA701,PLA190,PAA127,PLA191,PLA192,PLA193,IBB110P,PLA194,IXD_614PI,CPC1390G,IXD_604SI,CPC1726Y,TS117,TS118
San Ace C270 9B1TS type Bracket-mounted Centrifugal Fans
型号- 9B1TS,9B1TS48P0H001,9B1TS TYPE,9B1TS48P0G001
20 Years of Cost-Effective Performance With SANYO DENKI Long Life Cooling Fans
By drastically reducing maintenance needs, the Long Life Fan allows you to allocate resources more effectively, enhancing the cost-effectiveness of your projects. It’s a strategic choice that delivers ongoing savings and strengthens your competitive edge.
厂牌及品类 发布时间 : 2024-07-31
A0054942 Change the resin material of Impeller
型号- 9CRA0824P8G001,109-U0053-01,9GA0312E3002,9GA0312P3K0031,9GA0312E3001,9GA0712P1G0051,109-U0042-01,SAN ACE 60,9GA0312P3G0011,9GA0312P3K0041,9GA0312K3D0011,9GA0312P3G004-2,9CRA0612P6K001-2,9CRA0812P8G009,9CRA0812P8G006,9GA0312P3K0051,9CRA0812P8G008,9CRA0812P8G007,109-U0060-01,9CRA0812P8G001,9CRA0812P8G003,9GA0312P3J0011,109-U0017-01,9GA0712P1HD003,9CRA0812G8001,SAN ACE 38,9GA0312P3K0061,109-U0023-01,9CRA0612P6K010,9CRA0612P6K011,9CRA0612P6K014,9CRA0612P6K015,9CRA0612P6K013,9GA0312P3K010,9GA0312P3K011,9GA0312P3K001,109-U0028-01,9GA0312P3K003,9GA0312P3K004,9GA0312P3K005,9CRA0812P8G028,9GA0312P3K006,9CRA0812P8G027,9GA0312P3K007,9GA0312P3K008,9GA0312P3K009,9CRA0612P6K018,9CRA0812P8G024,9CRA0612P6K016,9CRA0812P8G026,9CRA0612P6K017,9CRA0812P8G025,9CRA0812P8G020,9CRA0812P8G022,9CRA0812P8G021,9CRA0648P0G003,9CRA0812P8G017,9CRA0812P8G016,9CRA0812P8G019,9CRA0812P8G018,9CRE0812P8G001,9CRA0812P8G012,9CRA0812P8G015,9GA0312J3D001,9GA0312H30011,9CRA0812P8G010,109-U0016-01,9CRA0812P8G040,9CRA,9CRE,9GA0312K3D001,9GA0312K3D003,9GA0312P3K0011,9GA0312P3J011,9GA,9GA0312E3D001,9CRA0812P8G049,9CRA0812P8G046,9CRA0812P8G045,9CRA0812P8G048,9CRA0812P8G042,9CRA0812P8G041,9CRA0812P8G044,9CRA0812P8G043,9GA0312P3J009,9GA0312P3J008,9GA0312P3J007,9GA0312P3J006,9GA0312P3J005,9GA0312P3J004,9GA0312P3J003,9GA0312P3J001,9GA0312P3J010,9GA0312J3001,9GA0312J3002,9GA0312J3003,9GA0312J3004,9CRA0812P8G039,9GA0312J3005,9CRA0812P8G038,9GA0312J3006,9CRA0612P6G001,9CRA0812P8G034,9CRA0812P8G037,9CRA0812P8G036,9CRA0812P8G031,9CRA0812P8G030,9CRA0812P8H001,9CRA0812P8G032,9GA0712P1G001,9GA0312P3G007,9CRA0612P6J001,9GA0312P3G008,9GA0312P3G005,9GA0312P3G006,9GA0312P3G003,9GA0712P1G007,9GA0312P3G004,9GA0712P1G008,109-U0010-01,9GA0312P3G001,9GA0712P1G009,9GA0712P1G003,9GA0712P1G004,9GA0712P1G005,9GA0712P1G006,9CRA0612P6J008,9GA0712P1H0011,109-U0067-01,9GA0312G3001,9CRA0612P0G009,9CRA0612P0G008,9CRA0612P0G007,9CRA0848P8A006,9CRA0848P8A005,9CRA0848P8A004,9CRA0612P0G001,9CRA0612P0G006,9CRA0612P0G005,109-U0026-01,9CRA0612P0G004,9CRA0612P0G003,9CRA0824G8D001,9CRA0612P6K003,9CRA0612P6K004,9CRA0612P6K001,9CRA0848P8A003,9GA0312P3K020,9GA0312P3K012,9GA0312P3K013,9GA0312P3K014,9GA0312P3K016,9GA0312P3K017,9GA0312P3K018,9GA0312P3K019,9CRA0612P6K007,9CRA0612P6K008,9CRA0612P6K005,9CRA0612P6K006,9GA0312K3001,9CRA0612P6K009,9CRA0848P8G011,9CRA0848P8G012,9CRA0848P8G010,9GA0312H3D001,9CRA0848P8G013,9GA0312P3K0071,9GA0712P1G0011,9GA0312G3-3,9GA0312G3D001,9GA0712P1H001,9CRA0848P8G001,9GA0312G3D003,9GA0712P1H003,9CRE0612P0G001,9CRA0848P8G009,9CRA0848P8G006,109-U0057-01,9GA0312E3D0011,9CRA0848P8G007,9CRA0848P8G004,9CRA0848P8G005,9CRA0848P8G003,9GA0312E30011,109-U0025-01,109-U0064-01,SAN ACE 70,9GA0312H3001,9GA0312P3K2031,9GA0312H3002,9GA0312H3003,9GA0712P1G0031,9CRA0612P0S003,9CRA0824P8GD001,9GA0312E30021,9CRA0812H8001,9GA0312P3G016,9CRA0612P0S001,SAN ACE 80,9GA0312P3G014,9GA0712H1D003,9GA0312P3G015,9GA0312P3G012,9GA0712H1D001,9GA0312P3G013,9GA0312P3G010,9CRA0612P6K018-3,9GA0312P3G011,9GA0712P1G0041
DC Fan Counter Rotating Fan Splash Proof Fan Splash Proof Centrifugal Fan Oil Proof Fan Long Life Fan Centrifugal Fan Blower
型号- 9WS1212H101,9WV0848P1H001,9W1TM48P4H01,109L1212H101,9CRA0412K401,9GV1212P4G01,9TM48P4H,109BF12HC2,9BMB12P2G01,9CRA0312P4K03,9WF1224H101,9GV1212J1011,9BMB12G201,9LG0612P4S001
Easy Guide on Open Loop vs. Closed Loop Control in DC Cooling Fans
This brief article explains the differences between open and closed loop control and how to tell what type of loop control the fan model has.
设计经验 发布时间 : 2024-07-26
SANYO DENKI Develops 60×60×56mm Counter Rotating Fan with the Highest Static Pressure and Airflow in the Industry
SANYO DENKI has developed and launched the 60×60×56mm San Ace 60 9CRH type Counter Rotating Fan that features the highest static pressure and airflow in the industry. It is suitable for cooling servers and ICT equipment.
产品 发布时间 : 2024-06-19
电子商城
服务
使用FloTHERM和Smart CFD软件，提供前期热仿真模拟、结构设计调整建议、中期样品测试和后期生产供应的一站式服务，热仿真技术团队专业指导。
实验室地址： 深圳 提交需求>
可定制ATA TE Cooler的冷却功率范围：35~800W；控温精度：≦±0.1℃；尺寸：冷面：20*20到500*300；热面：60*60到540*400 （长*宽；单位mm）。
最小起订量： 1 提交需求>
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