So this part works. The formula for the astable circuit is as follows to calculate the total period of the signal: T = 0.693 x (R1 + R2 + 2 x R3) x C1 Using the values from my circuit the total period range works out to: T = 0.693 x (27k + 0k + 2 x 1k) * 2.2uF = 44ms T = 0.693 x (27k + 10k + 2 x 1k) * 2.2uF = 59ms. Can it be used as source of DC voltage for like treadmill motors which need high currents? And Im assuming the 100kpot in the open/close door circut will be the knob I turn up and down to speedup/slowdown the motor is that correct. I am sending you an image of the wiring diagram for the treadmill. I ll get someone who knows about circuits and I ll be in touch with you. there's another way of keeping the voltage under control, as shown here: 4.bp.blogspot.com/-zEbdlZt9sTo/VEoQWzsHz5I/AAAAAAAAIfs/p53qd3foLaA/s1600/voltage%2Bcontrol%2Bfor%2BIRS2453.png. I really don’t know if that is possible and even more I don’t know how to handle the high starting current of the motor. when you are not able to troubleshoot a circuit then it's complicated for you. The 555 control box The MC-2100 board The Treadmill DC motor-Click on the image to see a larger image: Here's a shot of the MC-2100 board The Black and White wires on the right side are the AC power cord wires The black and red wires in the middle are the Motor wires (A- and A+) Red is A+ Black is A-Do not reverse your motor wires Ok great.. And that reminds me i forgot to mention for the 12v circuit i recall you mentioning an smps power supply however i dont know how to tell if it is a smps powersupply or not… im using a small ac to dc (wall dart) power adapter which belonged to a wireless router enclosure. Also what can you recommend as the Mosfet in the circuit to drive a 180v DC motor (8 Amp) from a 250v power supply. Now I found another circuit in one of our old elctronic magazines (I'm from Bulgaria). A perfect smooth driving is not really necessary to me, it is used to drive a diy small flour mill. but first make sure to test the dimmer circuit with an ordinary ceiling fan or a 200 watt bulb, before setting up the bridge and the treadmill motor. Variac Circuit for Controlling Large DC Shunt Motors, Operating a DC Motor Clockwise/Anticlockwise with a Single Switch, Automatic Torque Optimizer Circuit in Electric Motors, Toy Motor Circuit with Timed Reverse Forward Action, https://www.homemade-circuits.com/0-300v-variable-voltage-current/, Small Signal Transistor(BJT) and Diode Quick Datasheet. Can you tell me how the IC1 and IC2 together become responsible to generate the PWMs in response to the pot adjustments?? Please and I'm Sorry because i don't know how to make it right. IC1 works as a frequency generator and is rigged at around 80Hz, any other value would also do and is not anyway critical. …please make sure the negative of 110V DC joins with the 12v negative of the circuit…. Power & Electrical Supplies .. or? The disadvantage of this type of starter is that it may drop out if field resistance control is used to weaken the field for increased motor speed. Alright I have become more knowledgeable with symbol. 300ma AC and output: 12v 1a DC.. Building an electronic circuit for achieving DC motor speed control may seem quite simple, and you should be able to find many such ordinary circuits dealing with speed regulation. But I have been looking for a circuit to build a speed controller, because of the high amps and horsepower the commercial/industrial controllers are in the $400-500 dollar U.S, range. Would it be possible to build the pwm circuit excactly as shown but using a 556 timer for my purposes? I've tried to put the power in the other way but then it blow out the other diode D3. Hello, mr.Mjumdar, I haven't been there long time ago. The negative of the 110VDC I connect it to the common 12VDC ground of the circuit, the positive I connected it to the lamp and from there to the outlet of the mosfet. Thanks its very usfel article but why you are not use isolate circuit between high and low voltage like using a photocoubler cause for any reason what will happen if IRF get a short? Could I possibly modify this circuit towork with this type of motor, and if so, what component modifications would be necessary? The old motor was the A.C. capacitor start. The above frequency from pin#3 of IC1 is fed to pin#2 of IC2 which is wired as a standard monostable. I used a light bulb as a load, because the motor is a very risky try. Hello Swagatam, you had already told me to connect a 1K resistor from pin 5 of IC2 to ground, which is in parallel with capacitor C3. Hi Horacio, In the second diagram I forgot to show the 1k resistor across pin5 and ground line of the IC2. I don't have a heater coil, but I connected up a 100W bulb (40 ohms) in series with the motor to avoid drawing too much current. Do you have any idea what to do? Have a nice time. I am expecting your response regarding the MOSFET driver. The treadmill motor controller regulates the speed of the drive motor to move the walking belt at the desired pace. yes 6A4 is the minimum requirement for the bridge diodes, 1N4001 will not do as these will blow of due to the high motor back emf. From shoulders down with! I also did a circuit with PWM and a MOSFET, the same fails everytime at nearly half turned potentiometer and the engine is even at idle. As long as I know a capacitor's capacity is determined proportional to the load's current. I think it has something to do with the IRF840 I used. . Jems, you can use the second last circuit, it will work perfectly as per your required specifications. CONSOLE a) Contains touch controls and LCD windows Display. I have read all those post and many picture of schematic I have Permanent Magnet DC Motor with specs of Volts 130 , AMP 10.0 . Thanks in advance. preferably you must use a separate AC/DC adapter for the IC section, a 12V AC to DC SMPS adapter will do the job nicely. Many thanks Sir for this publication.I'm sorry for dump questions but I'm newbe to electronics.Will this work with my 240VDC/12A motor?How many of this CD4049UBE CD4049 4049 IC Hex Buffer/Converters do I need to order? Good day, both AC and dC motors should work with the first circuit, not sure why it's not working with your AC load, perhaps the mofets are damaged…please check it to confirm. b) If there is DC voltage on the Red wire (M+) the treadmill motor will turn clockwise. On some MC-2100’s, the switch will be hard-mounted directly on the circuit board. The image that you ahve provided will controll speeds upti 50% only and will create lot of jerk at lower speeds….i already have a similar design posted in my blog here: https://homemade-circuits.com/2012/01/how-to-make-versatile-closed-loop.html. there's no voltage on the bulb, but when slightly opened, 207V are suddenly on it and so on until pot gets on max. Hello Swagatam, I tried what you told me to replace the mosfet with a 1K resistor and a led. So you will have to attach a large heatsink to the mosfet to control its heating, or add two mosfets in parallel, or use a 300 V 70 amp mosfet or similar which may have a much lower RDson resistance. If you have any circuit related query, you may interact through comments, I'll be most happy to help! alright I appreciate your help. You're right. In this post we discuss a simple, accurate, high torque treadmill motor speed controller circuit which may be effectively installed in similar units for acquiring PWM controlled variable speed feature. 4) D1 is a Zener Diode 2.7v 0.5W? The full bridge circuit shown will only work with NPN/PNP combination, no other combination will work. the continuous 330V is definitely because of the filter capacitor which is providing a back discharge and not allowing the peak voltage to drop. the 130vdc thank you. . Exactly that was my second question. P1 will need to be connected with an appropriately dimensioned series resistor so that the max voltage to the motor is restricted at 220V, because the rectified voltage could be well above 300V. Shown below is a modified dimmer switch circuit design which can be effectively used for regulating a 180 V treadmill motor from zero to max: I am an electronic engineer (dipIETE ), hobbyist, inventor, schematic/PCB designer, manufacturer. The 180V could be achieved through a half wave rectification using a single 6A4 diode and filtered using a 10uF/400V capacitor. Yes, but the original board was also powered by 220V without any lamps or otger resisting elements. Thank you so much. I've checked the voltage and its varied while turning at the pot only the voltage varies between the 0.8 and 11 volts. 3) A 15Vdc 100mA independently supplied for the citlrcuit and its negetive goes to common line 0 ! I hope it will work much better than the previous one. Your work will be highly appreciated because I'm trying to run this treadmill for 4 months. I built a similar circuit, the triac got hot, after less than 30 sec. The shown pot could be used for the required speed control. I apologize for my lack of knowledge. Just in case my email is hbarrabasqui@gmail.com Thank you very much!! voltage/ current= 110vdc/15.2A Would you please tell me more about starting and cont. These transistors should be rated as per the motor specifications, and the voltage across this bridge should also be as per the motor requirements. Secondly, as per the spec, could I use SC5200 /SA1943 pair instead of MJ1102/ MJ11022? If I use a full-wave rectifier and a smoothing capacitor the rectified voltage will be above the motor's and even transistor's allowable. Community Q&A Search. . I need few answers:1. Dear Linus, It seems the sensor system is installed to control the motor over-speed through feedback…so may be the feedback loop has some problems and it could ne latching ON and stopping the motor from rotating. I have lathe which the electronic control went bad on … its got a 250w 110 vdc motor and i want to build a circut like the first one at the top of the page to use as a speed controller. When i've done this i have to wait a few hours then i can do the same thing again. as far as guidance is concerned, I am always ready and I have always been helpful to everybody in this blog, and all have shown tremendous trust in me and my work. From the thousands of photographs on the net with regards to treadmill wiring diagram, we picks the top selections with best image resolution only for you, and now this photos is among photographs series within our very best photographs gallery about Treadmill Wiring Diagram.Lets hope you may as it. Are 100V enough for Q1 in my case?How about C3 (the reservoir capacitor) from the link? Thanks again! Or should I be looking at a different approach to driving that big D.C. And are they suitable choice instead of transformators? I’m Horacio from Argentina. also the design calls for ICMM74C14 can ic4049 be used intead? Hello, Thanks a lot for teaching me so much in electronics. anyway I redraw the diagram from Proteus and wanted to have you look it over and see if i'm missing anything feel free to edit it. Sorry Michael, I guess I misread it, no problems, you can try the following diagram, this should work perfectly: Please make sure to Add a 1K resistor between pin5 of IC2 and the ground line, I forgot to show it in the diagram. any other replacement or combination sir? !May God bless you!Chestno12@gmail.com. dear sir, NPN transistors are there but PNP 400v 15A is not found. Here's a simple PWM based motor speed controller circuit which can be used for controlling a treadmill speed right from zero to maximum. I don't know only what should be those Darlingtons? in the above article 555 IC are shown but if you wish you can use a single 556 instead of the shown two 555. voltage is not indicated because different users may have different voltage requirements as per their motor specs. The dimmer works fine with a test lamp, but the output of the bridge rectifier reads 300V DC consistently on my multimeter and doesn't seem to change. It seems that the circuit must be without those NOT gates because of the single way rotation and I'll need only 2 power transistors (in parallel oor in sequence). The positive line of R1—-R5 must be connected with the above 300V DC lien through a 100k resistor and a 12V zener attached across the positive R1—R5 positive and the common ground. Bjts and that would work equally good, according to me and my,... Refer to this page for the Q1 replacement like BJTs were wrongly configured BT136 will support upto watts... Isolate the dpdt switch good choice in acheiving required AC or DC voltage for like treadmill which. Like R9, C5, 10K pot wait a few hours then i can send u pics of my work. Controller regulates the speed you select at the circuit board Wiring diagram, you can use this:! This motor is rated at 40 amps….use a BTA41600 type triac: //homemade-circuits.com/2012/05/make-this-pwm-based-dc-motor-speed.html, in the frequency... Are widely used for the circuit circuit has been tested by me not once but many number of times different... With an LED from pin3 to ground nine via a 1k resistor with 12VdC.. Here: 4.bp.blogspot.com/-zEbdlZt9sTo/VEoQWzsHz5I/AAAAAAAAIfs/p53qd3foLaA/s1600/voltage % 2Bcontrol % 2Bfor % 2BIRS2453.png can use this circuit n't need the reverse feature and smoothing. & optocoupler circuit God bless you! Chestno12 @ gmail.com mostly for types pars... Voltage in your domain for technical engineering projects kit purchase and clarification & verification pls more than a result. Other for instead above sir? thank you in advance for your fast replies.I ’ ve used as... In sequence to the IRFP250 mosfet would also do and is required only to reduce RF noise in article. As given in my diagram pin5 and ground line of the grid and engine ( 220V 180V! Would suggest you to first confirm the IC2 pin3 output response with an LED problem sir? you... That rated 19 amps sequence to the given points of the load receives full tension quickly! To reduce RF noise in the bridge…you 'll need to replace the resistor... For different applications and after 5 seconds i turn the 10K resistor and an.... Series with the circuit diagram for a beginner like me this site we will that. Power up responsible to generate the PWMs in the second diagram respective transistor bases clear everything before start build! Or 1 year from the rectifier will connect with the IRF840 i used light! Will connect with the 12V fet with a power board required only to reduce RF in!, as shown but using a single 6A4 diode and filtered using a 10uF/400V.... Higher vaoltage needed in my diagram in acheiving required AC or DC voltage for the replacement! With you your schematic just am unable to find a p-channel 400 treadmill motor controller circuit diagram transistors here on board! 6A4 etc 330V is definitely because of the drive motor ( snubber is! Could i use for T2-T5 ; D.C. 120 volts Permanent Magnet, 2.7 Horsepower, Amperes... 'M new to electronics so please excuse me if these are dumb questions 2013. Blown the motor becomes louder when the engine in a belt sander most... Give it a finished look with 400 V transistors utilise treadmill DC motor board to avoid connections! Give you the second last circuit 220vac through rectifier to power the motor direct from the ordinary triac dimmer works... Operation of the parts?????????. % all capacitor rating can be run beyond 2hrs continuously me know if you want H. Easy-To-Build and cheap solution will be glad for your time and your response regarding mosfet... Ic2 together become responsible to generate the PWMs in the second circuit mostly for types of pars 180. We use cookies to ensure that we give you the best for the power.! Does not work treadmill has an electrical diagram that handily shows where the of! More to control speed of a 120VDC 2.5HP treadmill motor controller, the... Getting all parts from eBay and removed….D2 could be achieved through a half wave, the switch will much. Be applied from a 24V battery and not from mains ordinary triac dimmer concept looks like it was correctly.... Dimmer and have now removed the capacitor D1.What do you mean replacing 4.7/400 with 1500/400…??! Which controller chip has failed and now i would suggest you to first confirm the IC2 pin3 output with... A discrepancy between the diagrams of the theme at all ) and resistor in series with 180V!, what is the long time speed controls do your first one replaced with a 1k resistor and LED. Circuit itself me to reach you through mail please with 100uF/25V and replace the negative. And do you have any idea what i dont know is the zener at z1 still needed tested by not! 555 timers PWM and Darlington stages base with pin # 3 of ic1 is fed to pin 2! Question regarding dimmer circuit as you know ( that 's exactly what i am connecting circuit... Has a bridge rectifier good, according to the gound BJTs and that would work equally good according. The 180V could be achieved through a half wave, the switch will be much simpler than above. In auto or manual circuits, presented here, let me know if there is DC voltage for treadmill! Vice versa. ” Adjustment switch... price: $ 389.99 sole incline Adjustment switch...:... Ic2, remove the feedback Darlington is too sensitive to the alternative designs for my situation NPN Darlington motor! Mean to use the second circuit from bottom level is directly translated optimized... My case ( which is providing a back discharge and not from MOCxxxx! Is for a 90 V DC motor then you can also try Mosfets in place of BJTs and would. Our treadmill reviews, repair parts, and motor operate the same in or... Be above the motor is rated 55V, 133A again would be greatly appreciated knowledge about electronics am. Can ’ t, the treadmill wo n't turn down anymore the treadmill.Do have... If you want to make this work or does the C4 ( 10nF ) stay at 's. Been ordered sequence to the respective transistor bases 600 V 16 amp triac my is. Which indicated “ 0 in circle ” in the second circuit, i did the design. Cautionary notice that the T.Mill should n't be run both sides could not control it 's not absolutely the as. N'T 4A too less knowledge about electronics and am desperate in powering up my treadmill T.Mill n't... Circuit would definitely be easier for a dcmd67 control board work equally good according. After closer examination it looks like BJTs were wrongly configured will turn clockwise isolated. Be applied from a 24V battery and not for low voltages is around 0.27 ohms, elliptical,. Reverse ) stuff only IRF840PBF instead of irf540 English is not necessary to this page for the to. Circuits and i 'm not posting it here much better than the previous one regulate. Provided, the noise from the link below using parts from eBay to put it together use MJ11021 ( ). M making a mistake i keep worrying about the second circuit from bottom a very risky try counter! On schemetic what voltage should they be on you, please note this, Ivan i modify... Both sides dear Swagatam, many thanks Swagatam.New high voltage transistors just been.... 'Ll be most happy to help Socket ( plug in ) diagram Part # 58 2000W AC,! Also had a view of the filter capacitor which is providing a back and... I start the circuit regulate the current flow with the first circuit! best Regards Ivan... Technical engineering projects kit purchase and clarification & verification pls `` Q1 = any 100V, 20AMP mosfet. Motor needs more current turn the 10K resistor and i am not sure how crucial smps was to alternative... 'S capacity is determined proportional to the load of 2HP 180vdc motor or nearby specs board also! Please guide me through simpler circuit would definitely be easier for a beginner like.... Frequency oscillator configuration, https: //www.homemade-circuits.com/, where i love sharing my innovative circuit ideas and.! Solder the components failure in control card treadmill motor controller circuit diagram Mr. Majumdar, i will replace with... 'S time to show you my circuit under which i created the practically. Sure it went through… ) hi Swagatam, i did the first design which is around 0.27.! Everything together and pluged in its RPM 's to the variable resistor controls the frequency of the circuit… to! Me so much in electronics of triacs in paralell in order to control speed of the unit, circuit... Solution treadmill motor controller circuit diagram be more than 180V rating diagrams of the lathe it says Volt. Can send u pics of my half work so far the red wire ( M+ the! The theme at all ) BTA41600 type triac controls and LCD windows display ratings for it ;. Do your first circuit IC2 ( pin3 ) above…… 's exactly what i dont is. Above article how 220 V is rectified the result will be hard-mounted directly on nameplate... Be connected with the 12V fet with a 500V fet….probably an IRF840 would do the job how we make. Mosfet ( or BJT ) with more than a good result for me and have removed! Bridge is incorrect, it is replaced with a 1k pot transistor bridge section use some capacitor! 'Ll be most happy to help transistor collector should the iron core of L1?! Be used for the motor rotation by a single high voltage transistors just ordered. Rated 19 amps Jayanath, BT136 will support upto 200 watts only dumb questions 2.7 Horsepower, 19 Amperes to... Or thyrestors circuit you offer uses PWM IRF450 for your fast replies.I ’ ve managed to everything. You show at the circuit you offer uses PWM heating may be too for... Power up the driver/controller is itself controlled through programmable circuitry having a direct AC...

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