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Hello I am planning to use an hcs12 for a windgenerator controler and was wondering if anyone has had any experience using its PWM output to drive an IGBT. Here the IGBT would be used to control the battery charge current (120 V, max 20 Amp). Could one simply put something like a Darlington IC between the PWM output and the gate of the IGBT or does it require more complex driver circuitry? The datasheets for the IGBTs I have found so far did not provide any examples ... Many thanks in advance! Robert Imhoff |
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PWM driver for IGBTs
Started by ●September 15, 2003
Reply by ●September 15, 20032003-09-15
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An app engineer at Fairchild swore to me that I could drive the IGBT gate directly from the uP using their ISL9V2040D3S. I put a 100 Ohm resistor in series, 'cause I recall some mechanism that caused oscillation in FETs when driving large inductive loads, and a pulldown for a backup shut-down, but it seems to work OK. The IGBT I'm using actually has both those resistors internal, so I'm calling my two resistors options. It just seemed too easy to add no parts. I'll be interested in what you learn. Bob White ----- Original Message ----- From: "ra" <> To: <> Sent: Monday, September 15, 2003 9:53 AM Subject: [68HC12] PWM driver for IGBTs Hello I am planning to use an hcs12 for a windgenerator controler and was wondering if anyone has had any experience using its PWM output to drive an IGBT. Here the IGBT would be used to control the battery charge current (120 V, max 20 Amp). Could one simply put something like a Darlington IC between the PWM output and the gate of the IGBT or does it require more complex driver circuitry? The datasheets for the IGBTs I have found so far did not provide any examples ... Many thanks in advance! Robert Imhoff -------------------- ">http://docs.yahoo.com/info/terms/ |
Reply by ●September 15, 20032003-09-15
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Here is way more information than you need on the subject: http://www.semikron.com/skcweb/e/applica/applica_help.html I don't work for Semikron; we use their IGBT modules in applications that are somewhat higher power than you are contemplating (up to 450V, 800A). Have you considered power MOSFETs? Gary Olmstead Toucan Technology Ventura CA At 06:53 PM 9/15/03 +0200, you wrote: >Hello > >I am planning to use an hcs12 for a windgenerator controler and was >wondering if anyone has had any experience using its PWM output to >drive an IGBT. >Here the IGBT would be used to control the battery charge current (120 >V, max 20 Amp). |
Reply by ●September 16, 20032003-09-16
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...yes i am using the hc12 in combination with the L6353-driver-IC to
drive an IGBT. it ist not ease to bring the hardware to work. the hc12-PWM is not the problem, but you will get a lot of problems wit the powersupply and emc-themes, because of the stron di/dt-values. even the decoupling of GND-signals an is a theme! i had to design thre drivercards. then it worked ;-) do not try to get an good integrated result - this is VERY difficult! stefan brandt |
Reply by ●September 16, 20032003-09-16
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The drive circuit depends on if the IGBT will be a high or low side switch. I suspect You will be using it on the high side, in which case You will need a sort of driver (ic or discrete). Take a look at International Rectifiers (IR) circuits. Note also that some driver circuits won't allow 100% on in a PWM circuit (since it uses the pulsing to generate a higher voltage than the positive supply, which is needed to drive the gate in a high side switch circuit). Ruben --- In , ra <swar@c...> wrote: > Hello > > I am planning to use an hcs12 for a windgenerator controler and was > wondering if anyone has had any experience using its PWM output to > drive an IGBT. > Here the IGBT would be used to control the battery charge current (120 > V, max 20 Amp). > Could one simply put something like a Darlington IC between the PWM > output and the gate of the IGBT or does it require more complex driver > circuitry? > The datasheets for the IGBTs I have found so far did not provide any > examples ... > > Many thanks in advance! > Robert Imhoff |
