22B-B024F104

22B-B024F104

22B-B024F104一种脉冲调制技术，调制信号的频率随输入信号幅值而变化，其占空比不变。由于调制信号通常为频率变化的方波信号，因此，PFM也叫做方波FM

PWM是频率的宽和窄的变化,PFM是频率的有和无的变化, PWM是利用波脉冲宽度控制输出,PFM是利用脉冲的有无控制输出。

其中PWM是目前应用在开关电源中为广泛的一种控制方式，它的特点是噪音低、满负载时效率高且能工作在连续导电模式，现在市场上有多款性能好、价格低的PWM集成芯片，如UCl842／2842／3842、TDAl6846、TL494、SGl525／2525／3525等；PFM具有静态功耗小的优点，但它没有限流的功能也不能工作于连续导电方式，具有PFM功能的集成芯片有MAX641、TL497等；PWM-PFM兼有PWM和PFM的优点。

22B-B024F104

1747-L511

1747-L514

1747-L524

1747-L531

1747-L532

1747-L541

1747-L542

1747-L542P

1747-L543

1747-L543P

1747-L551

1747-L552

1747-L553

1747-L553P

1747-M1

1747-M13

1747-M15

1747-M2

1747-M5

1747-BSN

ALLEN BRADLEY 505-BOD SIZE 1 REVERSING STARTER

GENERAL ELECTRIC CIRCUIT BREAKER 150 AMP 600 VOLT

WESTINGHO NUMA LOGIC 24 VAV DC INPUT MODULE NL-708

PARTLOW LIMIT SWTICH CHL63X

Norgren Air Valves

PERCEPTION CAMERA TRICAM CONTOUR SENSOR MODEL 911-0018

I-T-E CIRCUIT BREAKER 2 POLE 200A FRAME EQ TYPE QPP

SOLA 24 VOLT POWER SUPPLY 6 AMP OUTPUT 83-24-260-03

GE FANUC 115VAC INPUT MODULE IC610MDL125B

MEASUREMENT TECHNOLOGIES 3046B REPEATER POWER SUPPLY

CUTLER HAMMER CONTROL TRANSFORMER C0100E2AFB

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CUTLER-HAMMER INDUSTRIAL CIRCUIT BREAKER 30A,480V 2P

SQ D SAFETY SWITCH SINGLE THROW FUSIBLE 30 AMP 600 VAC

BURLE SECURITY PRODUCTS RECIEVER/DRIVER TYPE TC8560-2

SQUARE D 60 AMP 600 VOLT BLACK FRONT I LINE BREAKER

ANALOG DEVICES 5B37 CUSTOM RELAY bid is for 3

RELIANCE SP200 1 HP .75 KW VARIABLE FREQUENCY DRIVE

ORIENTAL MOTOR CO. LTD INDUCTION MOTOR 51K60GS-ST3F

SQUARE D SAFETY SWITCH, 3 POLE, 30 AMP, 600 VAC NEMA 1

Allen Bradley Size 1 Starter 509-BOD SERIES A

SPEEDAIRE AIR CYLINDER 6X381A

GENERAL ELECTRIC CIRCUIT BREAKER 3 POLE 40 A, 600 VAC

SQ D SAFETY SWITCH SINGLE THROW NO F 60 AMP 600 VAC

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JOHNSON CONTROLS DIFFERENTIAL PRESSURE CONTROL P74DA-15

 SQUARE D 9998 RA-82 4 POLE CONTACT KIT TYPE

CONTACTOR 3 POLE 80A, 600V

SQUARE D MAG-GARD MOTOR CIRCUIT PROTECTOR 3 AMP 480 V

HONEYWELL GAS PRESSURE SWITCH C437D 1005

MTE CORPORATION 3 PHASE LINE REACTOR , 600V, 18 AMP

SCHLEICHER TIME DELAY RELAY, TYP SZT32, 24 V, 0,15-3s

CROMPTON CURRENT TRANSFORMER 1600:5 797941U TELS

 GE HEAVY DUTY SAFETY SWITCH, 30 AMP, 3P, 240V, FUSI

ACOPIAN REGULATED POWER SUPPLY B24G50 1/4 AMP F

ALLEN BRADLEY SIZE 0 CONTACTOR 120 VOLT COIL 3 POLE

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TRANS COIL INC. 3 PHASE LINE REACTOR , 600V, 6 AMP

SQUARE D I-LINE CIRCUIT BREAKER 15 A 240 V 2 POLE

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CSI PULSE WIDTH MODULATION TO PNEUMATIC TRANSDUCER

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CUTLER HAMMER MPC1C30 I/O EXPANDER 2 INPUT 6 OUTPUT

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SIEMENS SIZE 0 ENCLOSED STARTER 14CSB12BF

EXERGEN COOLING JACKET KIT CJK-1 101200

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RELIANCE ELECTRIC 602909-66AE TRANSISTOR

WESTINGHO NUMA LOGIC 24 VAV DC INPUT MODULE NL-708

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 SQUARE D 9998 BA-81 CONTACT KIT SIZE 0 TYPE

 GE HEAVY DUTY SAFETY SWITCH, 30 AMP, 3P, 240V, FUSI

GENERAL ELECTRIC CIRCUIT BREAKER 110 AMP 600 VOLT

SQUARE D EDB24020 CIRCUIT BREAKER, 20A, 2 POLE EDB

SOLA 24 VOLT POWER SUPPLY 2.5 AMP OUTPUT 832422503

JOSLYN CLARK REVERSING CONTACTOR NEMA SIZE 00, 10 AMP

DWYER SERIES 3000 PHOTOHELIC PRESSURE SWITCH with GAGE

 GENERAL ELECTRIC LOAD CENTER 200 AMP RAINPR

ASCO RED HAT FUEL RATED GENERAL PURPOSE VALVE 120 VOLT

Sqaure D Telemecanique NON Reversing Starter

RED LION CONTROL MODEL 680 ANALOG COUNTER

RED LION RPGC0041 ROTARY PULSE GENERATOR

 CUTLER HAMMER 1357A-6513 55 SERIES PHOTOELEC 0592－5580708

NORGREN 12" STROKE STAINLESS AIR CYLINDER RLF12A-DAN-AA

SQUARE D COMPACT ENCLOSED LIMIT SWITCH 9007MS09S0102

UNITED ELECTRIC PRESSURE DIFFERENTIAL SWITCH J21K S127B

SQUARE D LUG IN LUG OUT CIRCUIT BREAKER 30 AMP 480 V

THERMON HEAT TRACE SPLICE KIT MOD ECA-1-SR

ALLEN BRADLEY SIZE 0 ENCLOSED STARTER 120 VOLT COIL