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Tech Head - The Technology Section
The Work Bench and Soldering Station
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<blockquote data-quote="Waveguide" data-source="post: 914191" data-attributes="member: 364636"><p>Only a diode will not work if you want to run the motor in both directions. Diodes</p><p>in series with zener diodes (two pairs anti-parallell) will limit the back emf.</p><p>Light-bulbs are nice, low resistance cold and higher resistance at full voltage.</p><p> </p><p>Another question to VS. The voltage rating of the relays is 24 V?</p><p>Running relays on voltages lower than nominal makes them much slower.</p><p>When the voltage is marginal you can hear a relay "dance the two-step".</p><p>The first part of the movement is aided by the spring action of the contact</p><p>it's leaving, the contact with the normally open part takes longer, that</p><p>contact is resisting the movement.</p><p> </p><p>Reversing a motor at full speed will create a lot of back emf. Can a SMPS handle</p><p>power dumped into the output of the PS?</p></blockquote><p></p>
[QUOTE="Waveguide, post: 914191, member: 364636"] Only a diode will not work if you want to run the motor in both directions. Diodes in series with zener diodes (two pairs anti-parallell) will limit the back emf. Light-bulbs are nice, low resistance cold and higher resistance at full voltage. Another question to VS. The voltage rating of the relays is 24 V? Running relays on voltages lower than nominal makes them much slower. When the voltage is marginal you can hear a relay "dance the two-step". The first part of the movement is aided by the spring action of the contact it's leaving, the contact with the normally open part takes longer, that contact is resisting the movement. Reversing a motor at full speed will create a lot of back emf. Can a SMPS handle power dumped into the output of the PS? [/QUOTE]
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Tech Head - The Technology Section
The Work Bench and Soldering Station
V-Box blew up :(
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