Multiplexing drive circuit for an AC ignition system

Multiplexing drive circuit for an AC ignition system

  • CN 102,713,254 B
  • Filed: 08/17/2010
  • Issued: 02/22/2017
  • Est. Priority Date: 08/18/2009
  • Status: Active Grant
First Claim
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1. a kind of multiplex drive circuit for AC ignition system module, including:

  • Public branch line, described public branch line includes two switches of series coupled;

    One or more bay-line, wherein every bay-line includes two switches of series coupled;

    For the non-central tapped transformer of each bay-line in described one or more bay-line, each transformerThere is the armature winding between a branch line being coupling in described one or more bay-line and described public branch line, whereinEach transformer has the secondary windings with spark plug parallel coupled;

    Pulsewidth modulation (PWM) on-off controller, described pulsewidth modulation (PWM) on-off controller is configured to operate public branch line to openClose and bay-line switch to control the spark discharge characteristic of described spark plug,Described two opening in one of described two switches in wherein said public branch line switch and every bay-lineOne of pass switch works in couples, and another in the described two switches in described public branch line switchs and described everyAnother switch in described two switches in bay-line works in couples, and operate in described public branch line inOne opening in the described two switches in one switch and described every bay-line in described two switchesClose in contrary state,Wherein said on-off controller uses high-frequency pulsed width modulation, wherein controls shared switch and special switch to include:

    Control manyThe spark discharge characteristic of individual described spark plug;

    Wherein said controller is configured to change the characteristic of specific spark discharge while flashing discharges,Wherein each transformer has the primary inductance of 109 microhenrys and the secondary inductance of 3.7 henries,Wherein each transformer has the primary leakage inductance of 28 microhenrys and the secondary leakage inductance of 0.95 henry, andWherein each transformer has 0.8630 primary coupling factor and 0.8630 secondary coupling factor.

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