Bridge Rectifier
As the output of the bridge rectifier approaches its maximum voltage
Conventional bridge rectifier circuits are not well equipped to handle high start-up currents and short-circuits which stress circuit components such as fuses, bridge diodes and smoothing capacitors. Typically, for example, the occurrence of an output short circuit destroys a protection fuse between the power supply and the bridge rectifier, requiring replacement of the fuse. To limit the in-rush current at turn-on, conventional circuits include a thermistor or a relay in series with the output of the rectifier bridge. However, thermistor protection, although inexpensive, is suitable only for low-power applications. Relay protection, while more reliable and efficient than a thermistor, presents a significant cost premium, typically 50% to more than 100% of the bridge rectifier cost, and occupies a significant amount of space, usually more than the bridge rectifier itself.
Therefore, a need exists for a self-contained bridge rectifier circuit which can be provided in a module or package similar to that of a conventional bridge rectifier, but which also provides in-rush current protection on start-up and short-circuit protection during operation without a significant cost premium.
The present invention overcomes the disadvantages of the prior art and achieves the objectives set forth above by providing an apparatus and method for rectifying an AC input voltage to produce a DC output voltage with control circuitry for automatically ramping the rectified output voltage up to a predetermined maximum output voltage. The control circuitry is preferably provided in the form of a power integrated circuit, such that the entire bridge rectifier circuit with the control circuitry can be packaged together in a standard-sized module.
The present invention includes a bridge rectifier circuit with at least one silicon controlled rectifier (SCR). The conduction interval of the SCR is governed by a ramped-up voltage provided by the control circuitry. The ramped-up voltage automatically widens the conduction interval of the SCR, generating a firing signal at the gate of the silicon controlled rectifier at increasingly earlier times in the input signal phase. During the initial portion of the voltage ramp-up, the control circuitry fires the SCR only during periods in which the AC input voltage has a negative slope.
As the output of the bridge rectifier approaches its maximum voltage, a continuous firing signal is provided to the gate of the silicon controlled rectifier to minimize current drain by the control circuitry.
Undesired firing of the SCR during spikes in the AC voltage is prevented by the control circuitry. Snubbers connected in parallel with the silicon controlled rectifier provide dV/dt immunity. Housekeeping power for the control circuitry is self-contained within the module.
The soft start bridge rectifier circuit using one or more SCRs to control the charging current of the dc bus capacitor is a prime candidate for motor control power trains. The circuit offers the following advantages when compared to an uncontrolled diode bridge with a precharge resistor and shorting relay: eliminating the precharge resistor and relay, saving space, improving reliability, providing automatic current limiting in the event of bus capacitor failure or output inverter leg failure, and providing regulation of the dc bus voltage thereby reducing the required voltage ratings of the bus capacitor and the inverter output switches.
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BRIDGE RECTIFIER 70 Amp 1-1000 volt- KBPC70A10 – Aluminum, FAN COOLED, DUAL 140A $39.99 |
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25A 1000V Metal Case Bridge Rectifier with Heatsink KBPC2510 $4.99 |
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QL25A 25A 1000V Single Phase Bridge Rectifier + Heatsink New $8.16 |
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IOR Bridge Rectifier E78996 $12.98 |
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800v 35a Bridge Rectifier 36mb80a $6.00 |
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KBPC2510 Single Phase 1000V 25A Square Bridge Rectifier $4.28 |
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1971-81 CADILLAC BUICK 1969-81 CHEVROLET OLDSMOBILE PONTIAC RECTIFIER BRIDGE $9.99 |
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Bridge Rectifier Single Phase Diode 25A Amp 1000V Volt KBPC2510 $3.99 |
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10A 1000V Volt Metal Case Bridge Rectifier with Heatsink QL10A $8.46 |
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35A 1000V Metal Case Bridge Rectifier,SEP KBPC3510, x 4 $7.80 |
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1PC PHILIPS ECG5335 3-PHASE BRIDGE RECTIFIER 600V 60A $7.50 |
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12 PCS MOTOROLA MDA3502 FULL WAVE BRIDGE RECTIFIER 200V 35A $6.50 |
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1PC FUJI 6RI75E-060 3-PHASE RECTIFIER BRIDGE 600V 75A $8.00 |
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12 PCS NEW SHINDENGEN D25XB60 BRIDGE RECTIFIER 600V 25A $6.50 |
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NTE ELECTRONICS 5324 BRIDGE RECTIFIER NTE5324 ***NEW*** $7.61 |
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Lot of 3 x NOS NTE167 Bridge Rectifier Replaces ECG167 GEBR-206 SK3697 $2.89 |
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MB2510 Single Phase Bridge Rectifier Half-Wave 1000V 25A $4.89 |
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2x 1000V 25A SEP KBP C2510 square bridge rectifier $7.99 |
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1984638 ACDelco RECTIFIER BRIDGE ASM $23.74 |
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SEMIKRON Power Bridge Rectifier SKD100/12 SEMIPONT 2 $24.99 |
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2x Bridge Rectifier 3 Phase Diode 20A Amp 1000V SQL20A $11.00 |
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2x Bridge Rectifier 3 Phase Diode 35A Amp 1000V SQL35A $10.99 |
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10x Bridge Rectifier 3 Phase Diode 35A Amp 1000V SQL35A $44.99 |
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40x Bridge Rectifier 3 Phase Diode 35A Amp 1000V SQL35A $150.00 |
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10x Bridge Rectifier 3 Phase Diode 20A Amp 1000V SQL20A $44.99 |
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40x Bridge Rectifier 3 Phase Diode 20A Amp 1000V SQL20A $150.00 |
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10x Bridge Rectifier 3 Phase Diode 50A Amp 1000V SQL40A $44.99 |
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40x Bridge Rectifier 3 Phase Diode 40A Amp 1000V SQL40A $150.00 |
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2x Bridge Rectifier 3 Phase Diode 50A Amp 1000V SQL50A $10.99 |
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10x Bridge Rectifier 3 Phase Diode 50A Amp 1000V SQL50A $45.00 |
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40x Bridge Rectifier 3 Phase Diode 50A Amp 1000V SQL50A $150.00 |
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D3991 ACDelco BRIDGE-RECTIFIER $52.52 |
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2x MDS150A 3-Phase Diode Bridge Rectifier 150A Amp 1600V $34.99 |
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5x MDS150A 3-Phase Diode Bridge Rectifier 150A Amp 1600V $85.00 |
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5 pcs KBP202 Full Wave Bridge Rectifier 100V $2.29 |
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NEW 25A 800V KBJ2508 Bridge Rectifier [E720] $0.01 |
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22 PCS 2W06 2A 600V Bridge Rectifier High-Speed /FREE registered mail $9.59 |
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300 PCS 2W06 2A 600V Bridge Rectifier High-Speed /FREE registered mail $84.99 |
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10A Amp 1200V Diode Bridge Rectifier Aluminum QLF10A $9.27 |
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10A 1000V 3 Phase Diode Bridge Rectifier with Heatsink SQL10A $7.66 |
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10 pcs 1000 Volt Bridge Rectifier 3Amp 310 $9.99 |
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100pcs D25BA80 D25XBA80 25A Bridge Rectifier $99.99 |
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100pcs DB107 DB-107 1A 700V Bridge Rectifier $17.99 |
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100pcs GBJ2508 GBJ-2508 25A 800V Bridge Rectifier $99.99 |
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100pcs GBU406 GBU-406 4A 600V Bridge Rectifier $79.99 |
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100pcs GBU808 GBU-808 8A 800V Bridge Rectifier $129.99 |
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100pcs KBL406 KBL-406 4A 600V Bridge Rectifier $64.99 |
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100pcs KBL608 KBL-608 6A 800V Bridge Rectifier $64.99 |
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100pcs KBL610 KBL-610 6A 1000V Bridge Rectifier $79.99 |
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100pcs KBP206 KBP-206 2A 600V Bridge Rectifier $64.99 |
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100pcs KBP210 KBP-210 2A 1000V Bridge Rectifier $44.99 |
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100pcs KBPC1010 KBPC-1010 10A 1000V Bridge Rectifier $99.99 |
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100pcs KBPC2510 KBPC-2510 25A 1000V Bridge Rectifier $149.99 |
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100pcs KBPC606 KBPC-606 6A 600V Bridge Rectifier $79.99 |
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100pcs KBPC610 KBPC-610 6A 1000V Bridge Rectifier $64.99 |
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100pcs KBU1010 KBU-1010 10A 1000V Bridge Rectifier $129.99 |
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100pcs KBU808 KBU-808 8A 800V Bridge Rectifier $64.99 |
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100pcs RS808 RS-808 8A 800V Bridge Rectifier $99.99 |
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100x MB6S 0.5A 600V Miniature Mini SMD Bridge Rectifier $34.99 |
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10pcs 1000 Volt Full-Wave Bridge Rectifier 2 Amp 2W10 $7.99 |
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KBU8D BRIDGE RECTIFIER, , 200V $4.35 |
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W08 X2 Bridge Rectifier $3.94 |
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40PCS MB6S SOP4 Bridge Rectifier IC $6.99 |
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10pcs Bridge Rectifier 3 Phase Diode 50A 1000V SQL50A $49.99 |
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KBPC5010 50A 1000V Single Phase Bridge Rectifier + Heatsink New $4.69 |
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10pcs D25BA80 D25XBA80 25A Bridge Rectifier $14.99 |
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10pcs GBJ2508 GBJ-2508 25A 800V Bridge Rectifier $14.99 |
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10pcs GBJ2510 2510 25A 1000V 25AMP Bridge Rectifier $14.99 |
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10pcs GBU406 GBU-406 4A 600V Bridge Rectifier $9.99 |
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10pcs GBU808 GBU-808 8A 800V Bridge Rectifier $17.99 |
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10pcs KBL406 KBL-406 4A 600V Bridge Rectifier $8.99 |
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10pcs KBL608 KBL-608 6A 800V Bridge Rectifier $8.99 |
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10pcs KBL610 KBL-610 6A 1000V Bridge Rectifier $9.99 |
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10pcs KBP206 KBP-206 2A 600V Bridge Rectifier $8.99 |
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10pcs KBP210 KBP-210 2A 1000V Bridge Rectifier $5.99 |
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10pcs KBPC1010 KBPC-1010 10A 1000V Bridge Rectifier $14.99 |
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10pcs KBPC2510 KBPC-2510 25A 1000V Bridge Rectifier $19.99 |
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10pcs KBPC3510 KBPC-3510 35A 1000V Bridge Rectifier $15.99 |
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10pcs KBPC5010 KBPC-5010 50A 1000V Bridge Rectifier $16.50 |
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10pcs KBPC606 KBPC-606 6A 600V Bridge Rectifier $9.99 |
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10pcs KBPC610 KBPC-610 6A 1000V Bridge Rectifier $8.99 |
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10pcs KBU1010 KBU-1010 10A 1000V Bridge Rectifier $17.99 |
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10pcs KBU808 KBU-808 8A 800V Bridge Rectifier $8.99 |
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10pcs RS808 RS-808 8A 800V Bridge Rectifier $14.99 |
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10x MB6S 0.5A 600V Miniature Mini SMD Bridge Rectifier $4.99 |
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10 x 2W10M Single Phase Silicon Bridge Rectifier 1000V 2A $4.89 |
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KBPC5010 50A 1000V Single Phase Bridge Rectifier + Heatsink New $5.03 |
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25A 1000V Bridge Rectifier high quality KBJ2510 [E721] $0.01 |
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Aluminum Heat Transfer Heatsink for KBPC Single Phase Bridge Rectifier $3.69 |
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2 pcs 1000 Volt Bridge Rectifier 3Amp 310 $4.99 |
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2 pcs 1000 Volt Full-Wave Bridge Rectifier 2 Amp 2W10 $3.99 |
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POWERSEM PSD 105/16 3-Phase Bridge Rectifier NEW! $45.00 |
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POWERSEM PSD 105/18 3-Phase Bridge Rectifier NEW! $50.00 |
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Ixys VUO 82-18 NO7 3-phase rectifier bridge NEW $45.00 |
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Ixsys VUO 125-16 NO7 3-Phase Bridge Rectifier $49.00 |
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Stack Diode Bridge Rectifier KBPC2510 $5.99 |
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20pcs Metal Case Bridge Rectifier SEP KBPC5010 50A 1000V $17.99 |
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20pcs D25BA80 D25XBA80 25A Bridge Rectifier $24.99 |
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20pcs DB107 DB-107 1A 700V Bridge Rectifier $4.99 |
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IXYS VUO160-12 NO7 Bridge Rectifier 3 Phase 1200V $45.00 |