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Thanks, yes you are right, controlling temperature by controlling the flow rate appears to be the main method....but it is a poor method....just cheaper....I reviewed the specifications of some electronically controlled instant water heaters. Interestingly they are controlling the water flow by a motor valve, not the heater power.
Apart from component costs, to reduce power dissipation at 32 A below triac level, you would need less than 18 mOhms Rdson for each of the two MOSFETs. Did you identify suitable transistors?Why use back-to-back power FETs when a triac is so much cheaper and easier to control?
Thanks, no we didnt, but we will parallel them.Apart from component costs, to reduce power dissipation at 32 A below triac level, you would need less than 18 mOhms Rdson for each of the two MOSFETs. Did you identify suitable transistors?
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