That's an interesting idea. When I tested it without the 3-phase motor, it only produces a single phase output. So, in theory, it can supply a single phase load, within its capacity. But since the user's manual specifically mentions that it was designed for 3-phase motors only, so I'm not sure how it will perform when used in single-phase application.
Thank you very much for the information, I thought about buying the equipment to test frequency converters in my laboratory but it will definitely not help me, a great contribution, greetings from Peru
Thank you for the video, I have a question for you. With no motor hooked up the DPS outputs single phase, two wires have power going out. When a 3 phase motor is powered on single phase, 2 wires having power to it, the third wire on the motor will output power ( like a motor for a rotary phase converter ). When you checked voltage with the motor running how do you know the DPS was putting out 3 lines of power? Couldn't it still be putting out single phase ( two lines ) and the third line was incoming power from the motor that showed your voltage reading?
You made an interesting observation. I appreciate it. This somehow reminded me of an open-delta transformer. As you know, a 3-phase motor will not self-start on single phase power. This one does, even though only single phase voltage is output by the DPS when no motor is connected. It would seem that the DPS designers have some sort of proprietary circuit in the DPS that supplies the missing 3rd phase as soon as it detects the presence of a 3-phase motor winding. How do I know? In a practical sense, when I tested the phase sequence with a Kyoritsu KEW2062BT, I got a proper indication of a 3-phase power supply coming out of the DPS. Here's a link to that: ruclips.net/user/shorts9j-Jbf1WRZ4?si=5fTlC0W0KsAkt7fE I cannot, however, cite formulas or EE principles in support since only the DPS manufacturer really knows what's going on at the DPS.
Hi, thanks for you video...i have one question ? Do you know if this DPS can work with 2 phases 110 volt as in america Dont have one single fase 220 as europ
@@alexeydearanaespinosa1667 Thanks for watching. Unfortunately they seem to only have 200-240V units available. I looked at their website (Myung Youn Electronics) but there's no 100-130V DPS at this time.
After two years, would you still recommend this unit? I contacted the company through ebay regarding my 1.5 hp motor and they were less than helpful regarding whether this unit would work or not. I was quite disappointed. But I don't want to damage my motor. Thank you.
I apologize, as I haven't used it to run a loaded 3-phase motor. I use it only to get a 3-phase voltage for testing my digital multimeters/clamp meters. As you know, it will not produce a 3-phase output unless connected to a 3-phase AC motor. So, I don't have a first hand experience how it will perform under load. Although it successfully converted a single-phase input to 3-phase output when the unloaded motor was hooked up, it did so at a higher than usual voltage unbalance. As they mentioned in the user's guide, the no-load voltage unbalance will drop to normal values once the motor is loaded to its capacity. But again, I've not tried it. You're right to be reluctant, especially if your motor will be turning an important or sensitive load.
Hello! Excellent video! Question. Will this Digital Phase Shifter work for an industrial fan application with a 1hp 3-Phase motor? My concern is if the fan blades would provide enough load to balance the voltages across the legs, since they're not balanced when the motor is unloaded. The blade on this fan is about 30 inches diameter. Would you recommend this for a fan application?
Thanks for watching! The printed notice on the box says it's best for 1Hp motor, so on paper it should be able to handle the 1Hp 3-phase fan motor (220V, 60Hz). I have not tested it though. My suggestion, if possible, connect a 3A single phase breaker at the input side of the DPS before operating the 3-phase fan load. (746W, 1Hp/220= 3.3A) The breaker should at least provide over current protection in case excessive current unbalance occurs while the fan is running.
@@ramschannelreviews Thank you for your reply. So just making sure, connect the 3A single phase breaker at the input side of the DPS? Would there any benefit on installing another 3A breaker (3 phase) on the load/output side of the DPS?
@@bigtimlikewhoa Thanks for your interest in this matter. I have to caution you though that I am not expert on DPS. So please take my opinion with a grain of salt. At the 3-phase side, the load current is not 3A but 2.2A (assuming pf=0.85). The obvious benefit of a 3-phase breaker is that it becomes the overcurrent protection and disconnect device. I am not certain however, how this 3-phase breaker would respond to the current imbalance of the DPS. You may want to consult with an electrician on this matter.
Hello sir, may I clarify first. I had not loaded the motor due to restrictions on my test. I just let it run without load for the main purpose of getting a 3-phase supply for testing my DMMs and clamp meters. The voltage unbalance at the output of the DPS with unloaded motor running was what you see in the video. The 3-phase motor line currents were: 1A, 3.8A, & 2.7A without load- also unbalanced. While the rated LOAD current of the motor at 220V is 3.5A. As you can see, Line 2 (3.8A) was already at the rated load current due to voltage unbalance. Unfortunately I could not test my motor at its rated load at this time so I can't check the manufacturer's claim that voltage and current will just balance out when the motor is loaded. I would suggest that you also read reviews on amazon about the DPS as a lot of users share their experience while using the DPS with a loaded motor. Thanks for your support!
@@ramschannelreviews this is excellent video, thank you for the reply, I’m going to copy exact setup you have, I have a 5hp 3 phase motor on a jet pump which is used for high volume and high pressure In irrigation and or water supply, I have two uses one for irrigation let it run wide open, I have a vfd as well to use when running it on a pond fountain, I only need 1.5 hp to do the pond really well, I picked this pump up for 80$ used and retail is over 2,000, thank you for this video
@@BloodCover Glad you found it useful. Just as a reminder, do check the compatibility of ratings of the DPS with your motors and have over current protection as well. Thanks for your support and appreciation. You got a great deal on that pump. Good luck!
Hello po! I wouldn't recommend it primarily because I don't run my DPS on a loaded motor. So I don't have enough data in this regard. It's only for providing 3-phase voltage for my test instruments. For a 5 ton HVAC equipment you'd expect to draw around 17kW of power. Although the DPS manufacturer offers a unit for that size I'd advise you to talk to your electrical contractor whether it's safer & more practical to just apply for a 3-phase electric service. Thanks for your support.
Nowhere in the user's manual that I have and in their website was a VFD setup used in an example, so I don't think so. If you wish you may contact the manufacturer, Myung Youn, directly to be sure. Thanks for watching!
Hello, I have DPS and it does the same as your test shows on the voltage imbalance…. I am disappointed however in my unit… it claims to have excellent start up torque….But it won’t start my machine unless it is in low speeds. It doesnt seem to have good start up torque as claimed. I run a 3 hp motor on a milling machine. I have to start it in low speed 1st and once running then I can turn my variable hand crank to maximum speed. It makes it difficult if I forget to turn it back to low speed before shutting machine off because machine needs to be running to change speeds. My speed change is done via 2 pulleys opening/closing while running only.
Hi Earl, I believe this is one of the compromises of running the DPS. At least you did not burn out your motor, as happened with other users. I understand the inconvenience. In my case I only wanted a three-phase voltage for my test equipment. But the DPS, as you discovered, will not provide 3-phase voltage unless there is a 3-phase motor load *and it must be running.* May be you can place a sticker to remind you to change speed before turning it off?
I'm not sure, but I'm sure a retrofit would be possible. You'd have to check if the motor on the compressor is compatible with this device. The same goes for VFDs, digital phase converters, and rotary phase converters. I've also seen static phase converters based on capacitors and various electrical wizardry far beyond my paygrade. My understanding is that digital phase converters and VFDs are generally the best options in terms of efficiency.
Could these DPS devices be used to power a heating element instead of a motor (within it's output capacity of course)?
That's an interesting idea. When I tested it without the 3-phase motor, it only produces a single phase output. So, in theory, it can supply a single phase load, within its capacity. But since the user's manual specifically mentions that it was designed for 3-phase motors only, so I'm not sure how it will perform when used in single-phase application.
I love how you bend your wires. Some of them may be bent past the maximum bend radius though.
I appreciate the heads up on bend radius, Tom. Thanks for watching!
Thank you very much for the information, I thought about buying the equipment to test frequency converters in my laboratory but it will definitely not help me, a great contribution, greetings from Peru
Glad the video was useful to you. Have a great day, people of Peru!
As usual to every uploaded videos sir Ram, very informative content to sir! Looking forward to see more videos from your channel 😀
Thanks sir Ky. Ingat po kayo!☺️
Excellent is precisely the information I was looking for, I congratulate you for your work!! Greetings from Mexico
Thanks a lot for your support and comments.
Great review. Nice work, I appreciate the detail. Thanks
I appreciate your comments. Thanks for your support!
great review. I believe that there is only one capacitor placed inside the phase shifter.
Thanks for your insights. I appreciate it.
Thank you for the video, I have a question for you. With no motor hooked up the DPS outputs single phase, two wires have power going out. When a 3 phase motor is powered on single phase, 2 wires having power to it, the third wire on the motor will output power ( like a motor for a rotary phase converter ). When you checked voltage with the motor running how do you know the DPS was putting out 3 lines of power? Couldn't it still be putting out single phase ( two lines ) and the third line was incoming power from the motor that showed your voltage reading?
You made an interesting observation. I appreciate it. This somehow reminded me of an open-delta transformer. As you know, a 3-phase motor will not self-start on single phase power. This one does, even though only single phase voltage is output by the DPS when no motor is connected. It would seem that the DPS designers have some sort of proprietary circuit in the DPS that supplies the missing 3rd phase as soon as it detects the presence of a 3-phase motor winding. How do I know? In a practical sense, when I tested the phase sequence with a Kyoritsu KEW2062BT, I got a proper indication of a 3-phase power supply coming out of the DPS. Here's a link to that: ruclips.net/user/shorts9j-Jbf1WRZ4?si=5fTlC0W0KsAkt7fE
I cannot, however, cite formulas or EE principles in support since only the DPS manufacturer really knows what's going on at the DPS.
good morning sir i like how you explain on your demo very clear and i understand good job.
Thanks sir for your comments. I appreciate your support!
Hi, thanks for you video...i have one question ? Do you know if this DPS can work with 2 phases 110 volt as in america Dont have one single fase 220 as europ
@@alexeydearanaespinosa1667 Thanks for watching. Unfortunately they seem to only have 200-240V units available. I looked at their website (Myung Youn Electronics) but there's no 100-130V DPS at this time.
After two years, would you still recommend this unit? I contacted the company through ebay regarding my 1.5 hp motor and they were less than helpful regarding whether this unit would work or not. I was quite disappointed. But I don't want to damage my motor. Thank you.
I apologize, as I haven't used it to run a loaded 3-phase motor. I use it only to get a 3-phase voltage for testing my digital multimeters/clamp meters. As you know, it will not produce a 3-phase output unless connected to a 3-phase AC motor. So, I don't have a first hand experience how it will perform under load. Although it successfully converted a single-phase input to 3-phase output when the unloaded motor was hooked up, it did so at a higher than usual voltage unbalance. As they mentioned in the user's guide, the no-load voltage unbalance will drop to normal values once the motor is loaded to its capacity. But again, I've not tried it. You're right to be reluctant, especially if your motor will be turning an important or sensitive load.
Ram, have you tried other similar products that have less imbalance?
Hello E.K. no I haven't found one yet with less imbalance.
Hello! Excellent video! Question. Will this Digital Phase Shifter work for an industrial fan application with a 1hp 3-Phase motor? My concern is if the fan blades would provide enough load to balance the voltages across the legs, since they're not balanced when the motor is unloaded. The blade on this fan is about 30 inches diameter. Would you recommend this for a fan application?
Thanks for watching! The printed notice on the box says it's best for 1Hp motor, so on paper it should be able to handle the 1Hp 3-phase fan motor (220V, 60Hz). I have not tested it though. My suggestion, if possible, connect a 3A single phase breaker at the input side of the DPS before operating the 3-phase fan load. (746W, 1Hp/220= 3.3A) The breaker should at least provide over current protection in case excessive current unbalance occurs while the fan is running.
@@ramschannelreviews Thank you for your reply. So just making sure, connect the 3A single phase breaker at the input side of the DPS? Would there any benefit on installing another 3A breaker (3 phase) on the load/output side of the DPS?
@@bigtimlikewhoa Thanks for your interest in this matter. I have to caution you though that I am not expert on DPS. So please take my opinion with a grain of salt. At the 3-phase side, the load current is not 3A but 2.2A (assuming pf=0.85). The obvious benefit of a 3-phase breaker is that it becomes the overcurrent protection and disconnect device. I am not certain however, how this 3-phase breaker would respond to the current imbalance of the DPS. You may want to consult with an electrician on this matter.
excellent
I appreciate your support!
Hi sir, how about the current output of the motor? Tama po ba sa rating while running? Thanks
Hello sir, may I clarify first. I had not loaded the motor due to restrictions on my test. I just let it run without load for the main purpose of getting a 3-phase supply for testing my DMMs and clamp meters. The voltage unbalance at the output of the DPS with unloaded motor running was what you see in the video. The 3-phase motor line currents were: 1A, 3.8A, & 2.7A without load- also unbalanced. While the rated LOAD current of the motor at 220V is 3.5A. As you can see, Line 2 (3.8A) was already at the rated load current due to voltage unbalance. Unfortunately I could not test my motor at its rated load at this time so I can't check the manufacturer's claim that voltage and current will just balance out when the motor is loaded. I would suggest that you also read reviews on amazon about the DPS as a lot of users share their experience while using the DPS with a loaded motor. Thanks for your support!
Hello sir is it applicable to PMSM motor 3 phase .38 HP
Hello po. Sorry I have not handled a pmsm motor. It seems it needs precision control. Baka hindi sya pwede sa DPS. Ingat po.
Thank you for the advise.
Are both wires on the top of the phase shifter hot wires 120v each or is one a ground wire
Both are hot wires in my case since that's our residential utility service voltage configuration: 230V, 60Hz, single phase nominal.
@@ramschannelreviews this is excellent video, thank you for the reply, I’m going to copy exact setup you have, I have a 5hp 3 phase motor on a jet pump which is used for high volume and high pressure In irrigation and or water supply, I have two uses one for irrigation let it run wide open, I have a vfd as well to use when running it on a pond fountain, I only need 1.5 hp to do the pond really well, I picked this pump up for 80$ used and retail is over 2,000, thank you for this video
@@BloodCover Glad you found it useful. Just as a reminder, do check the compatibility of ratings of the DPS with your motors and have over current protection as well. Thanks for your support and appreciation. You got a great deal on that pump. Good luck!
hi siir! my question is, is it posible to use this device (DPS) for aircon 5TR? thanks for your answere? Godbless
Hello po! I wouldn't recommend it primarily because I don't run my DPS on a loaded motor. So I don't have enough data in this regard. It's only for providing 3-phase voltage for my test instruments. For a 5 ton HVAC equipment you'd expect to draw around 17kW of power. Although the DPS manufacturer offers a unit for that size I'd advise you to talk to your electrical contractor whether it's safer & more practical to just apply for a 3-phase electric service. Thanks for your support.
can this be used to run a vfd that will run the motor?
Nowhere in the user's manual that I have and in their website was a VFD setup used in an example, so I don't think so. If you wish you may contact the manufacturer, Myung Youn, directly to be sure. Thanks for watching!
Can I use that on forward reverse control And wye delta control?
No. This DPS simply converts single phase to 3-phase by electronic means. It has no mechanical parts or switches. Thanks for watching.
Pwd bh yn sir sa 7.5 hp
Hello, I have DPS and it does the same as your test shows on the voltage imbalance…. I am disappointed however in my unit… it claims to have excellent start up torque….But it won’t start my machine unless it is in low speeds. It doesnt seem to have good start up torque as claimed. I run a 3 hp motor on a milling machine. I have to start it in low speed 1st and once running then I can turn my variable hand crank to maximum speed. It makes it difficult if I forget to turn it back to low speed before shutting machine off because machine needs to be running to change speeds. My speed change is done via 2 pulleys opening/closing while running only.
Hi Earl, I believe this is one of the compromises of running the DPS. At least you did not burn out your motor, as happened with other users. I understand the inconvenience. In my case I only wanted a three-phase voltage for my test equipment. But the DPS, as you discovered, will not provide 3-phase voltage unless there is a 3-phase motor load *and it must be running.* May be you can place a sticker to remind you to change speed before turning it off?
Anyone running a 7.5 hp compressor with this
I'm not sure, but I'm sure a retrofit would be possible. You'd have to check if the motor on the compressor is compatible with this device. The same goes for VFDs, digital phase converters, and rotary phase converters. I've also seen static phase converters based on capacitors and various electrical wizardry far beyond my paygrade. My understanding is that digital phase converters and VFDs are generally the best options in terms of efficiency.