Could four of these TRIACs be used to build an H-bridge?
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An H-bridge usually is used to get fwd and reverse direction with pwm
speed control on a brushed dc motor. A triac is usually used to switch
on the AC line to a load like a lamp part way through the half cycle.
Perhaps you have a new idea to combine these two normally entirely
different applications in a unique and unobvious way? Tell us more.
Re: building an H-bridge ... An H-bridge usually is used to get fwd and reverse direction with pwm...speed control on a brushed dc motor....identical triacs can be used instead of 2 npn and 2 pnp transistors. ... (sci.electronics.basics)
Re: DIY speed control of ~1hp PM DC motor? ... I'm using it to replace the driver board that used to be in my just bought Bridgeport's x feed motor.... People took exception to the design, and an Intel guru took pity on us and set it up in a circuit simulator and, with the benefit of his experience, he recommended some circuit changes. ... "I have finally had a chance to examine the PM-DC motor speed control article that appeared in the May/June 1996 and the January/February 1997 issues of HSM. ... Without significant resistance the SCR could be destroyed by excessive gate current if power were applied when the line voltage was at peak value and the speed control happened to be at the maximum possible motor speed. ... (rec.crafts.metalworking)
Re: Do you think NI can fix my PLL? ... It seems like you may need a much higher bandwidth than the typical servo amp provides. ... I am assuming there is some digital circuitry in the servo amp (has to be at least a PWM... The PM motor was driven with a linear amp, a transistor boosted power op-amp, like you speak of below. ... The PLL loop compensation filter took care of the rest. ... (sci.electronics.design)
DIY speed control of ~1hp PM DC motor? ... People took exception to the design, and an Intel guru took pity on us and set it up in a circuit simulator and, with the benefit of his experience, he recommended some circuit changes. ... "I have finally had a chance to examine the PM-DC motor speed control article that appeared in the May/June 1996 and the January/February 1997 issues of HSM. ... Without significant resistance the SCR could be destroyed by excessive gate current if power were applied when the line voltage was at peak value and the speed control happened to be at the maximum possible motor speed. ... (rec.crafts.metalworking)
Re: Do you think NI can fix my PLL? ... It seems like you may need a much higher bandwidth than the typical servo amp provides. ... I am assuming there is some digital circuitry in the servo amp (has to be at least a PWM... The PM motor was driven with a linear amp, a transistor boosted power op-amp, like you speak of below. ... The PLL loop compensation filter took care of the rest. ... (sci.electronics.design)
